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Paul Elliott2238eed2022-07-08 18:19:12 +01001Mbed TLS ChangeLog (Sorted per branch, date)
2
Minos Galanakis974388f2023-10-03 22:07:22 +01003= Mbed TLS 3.5.0 branch released 2023-10-05
Minos Galanakis80a81562023-10-03 22:03:50 +01004
5API changes
6 * Mbed TLS 3.4 introduced support for omitting the built-in implementation
7 of ECDSA and/or EC J-PAKE when those are provided by a driver. However,
8 their was a flaw in the logic checking if the built-in implementation, in
9 that if failed to check if all the relevant curves were supported by the
10 accelerator. As a result, it was possible to declare no curves as
11 accelerated and still have the built-in implementation compiled out.
12 Starting with this release, it is necessary to declare which curves are
13 accelerated (using MBEDTLS_PSA_ACCEL_ECC_xxx macros), or they will be
14 considered not accelerated, and the built-in implementation of the curves
15 and any algorithm possible using them will be included in the build.
16 * Add new millisecond time type `mbedtls_ms_time_t` and `mbedtls_ms_time()`
17 function, needed for TLS 1.3 ticket lifetimes. Alternative implementations
18 can be created using an ALT interface.
19
20Requirement changes
21 * Officially require Python 3.8 now that earlier versions are out of support.
22 * Minimum required Windows version is now Windows Vista, or
23 Windows Server 2008.
24
25New deprecations
26 * PSA_WANT_KEY_TYPE_xxx_KEY_PAIR and
27 MBEDTLS_PSA_ACCEL_KEY_TYPE_xxx_KEY_PAIR, where xxx is either ECC or RSA,
28 are now being deprecated in favor of PSA_WANT_KEY_TYPE_xxx_KEY_PAIR_yyy and
29 MBEDTLS_PSA_ACCEL_KEY_TYPE_xxx_KEY_PAIR_yyy. Here yyy can be: BASIC,
30 IMPORT, EXPORT, GENERATE, DERIVE. The goal is to have a finer detail about
31 the capabilities of the PSA side for either key.
32 * MBEDTLS_CIPHER_BLKSIZE_MAX is deprecated in favor of
33 MBEDTLS_MAX_BLOCK_LENGTH (if you intended what the name suggests:
34 maximum size of any supported block cipher) or the new name
35 MBEDTLS_CMAC_MAX_BLOCK_SIZE (if you intended the actual semantics:
36 maximum size of a block cipher supported by the CMAC module).
37 * mbedtls_pkcs5_pbes2() and mbedtls_pkcs12_pbe() functions are now
38 deprecated in favor of mbedtls_pkcs5_pbes2_ext() and
39 mbedtls_pkcs12_pbe_ext() as they offer more security by checking
40 for overflow of the output buffer and reporting the actual length
41 of the output.
42
43Features
44 * All modules that use hashes or HMAC can now take advantage of PSA Crypto
45 drivers when MBEDTLS_PSA_CRYPTO_C is enabled and psa_crypto_init() has
46 been called. Previously (in 3.3), this was restricted to a few modules,
47 and only in builds where MBEDTLS_MD_C was disabled; in particular the
48 entropy module was not covered which meant an external RNG had to be
49 provided - these limitations are lifted in this version. A new set of
50 feature macros, MBEDTLS_MD_CAN_xxx, has been introduced that can be used
51 to check for availability of hash algorithms, regardless of whether
52 they're provided by a built-in implementation, a driver or both. See
53 docs/driver-only-builds.md.
54 * When a PSA driver for ECDH is present, it is now possible to disable
55 MBEDTLS_ECDH_C in the build in order to save code size. For TLS 1.2
56 key exchanges based on ECDH(E) to work, this requires
57 MBEDTLS_USE_PSA_CRYPTO. Restartable/interruptible ECDHE operations in
58 TLS 1.2 (ECDHE-ECDSA key exchange) are not supported in those builds yet,
59 as PSA does not have an API for restartable ECDH yet.
60 * When all of ECDH, ECDSA and EC J-PAKE are either disabled or provided by
61 a driver, it is possible to disable MBEDTLS_ECP_C (and MBEDTLS_BIGNUM_C
62 if not required by another module) and still get support for ECC keys and
63 algorithms in PSA, with some limitations. See docs/driver-only-builds.txt
64 for details.
65 * Add parsing of directoryName subtype for subjectAltName extension in
66 x509 certificates.
67 * Add support for server-side TLS version negotiation. If both TLS 1.2 and
68 TLS 1.3 protocols are enabled, the TLS server now selects TLS 1.2 or
69 TLS 1.3 depending on the capabilities and preferences of TLS clients.
70 Fixes #6867.
71 * X.509 hostname verification now supports IPAddress Subject Alternate Names.
72 * Add support for reading and writing X25519 and X448
73 public and private keys in RFC 8410 format using the existing PK APIs.
74 * When parsing X.509 certificates, support the extensions
75 SignatureKeyIdentifier and AuthorityKeyIdentifier.
76 * Don't include the PSA dispatch functions for PAKEs (psa_pake_setup() etc)
77 if no PAKE algorithms are requested
78 * Add support for the FFDH algorithm and DH key types in PSA, with
79 parameters from RFC 7919. This includes a built-in implementation based
80 on MBEDTLS_BIGNUM_C, and a driver dispatch layer enabling alternative
81 implementations of FFDH through the driver entry points.
82 * It is now possible to generate certificates with SubjectAltNames.
83 Currently supported subtypes: DnsName, UniformResourceIdentifier,
84 IP address, OtherName, and DirectoryName, as defined in RFC 5280.
85 See mbedtls_x509write_crt_set_subject_alternative_name for
86 more information.
87 * X.509 hostname verification now partially supports URI Subject Alternate
88 Names. Only exact matching, without any normalization procedures
89 described in 7.4 of RFC5280, will result in a positive URI verification.
90 * Add function mbedtls_oid_from_numeric_string() to parse an OID from a
91 string to a DER-encoded mbedtls_asn1_buf.
92 * Add SHA-3 family hash functions.
93 * Add support to restrict AES to 128-bit keys in order to save code size.
94 A new configuration option, MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH, can be
95 used to enable this feature.
96 * AES performance improvements. Uplift varies by platform,
97 toolchain, optimisation flags and mode.
98 Aarch64, gcc -Os and CCM, GCM and XTS benefit the most.
99 On Aarch64, uplift is typically around 20 - 110%.
100 When compiling with gcc -Os on Aarch64, AES-XTS improves
101 by 4.5x.
102 * Add support for PBKDF2-HMAC through the PSA API.
103 * New symbols PSA_WANT_KEY_TYPE_xxx_KEY_PAIR_yyy and
104 MBEDTLS_PSA_ACCEL_KEY_TYPE_xxx_KEY_PAIR_yyy (where xxx is either ECC, RSA
105 or DH) were introduced in order to have finer accuracy in defining the
106 PSA capabilities for each key. These capabilities, named yyy above, can be
107 any of: BASIC, IMPORT, EXPORT, GENERATE, DERIVE.
108 - DERIVE is only available for ECC keys, not for RSA or DH ones.
109 - implementations are free to enable more than what it was strictly
110 requested. For example BASIC internally enables IMPORT and EXPORT
111 (useful for testing purposes), but this might change in the future.
112 * Add support for FFDH key exchange in TLS 1.3.
113 This is automatically enabled as soon as PSA_WANT_ALG_FFDH
114 and the ephemeral or psk-ephemeral key exchange mode are enabled.
115 By default, all groups are offered; the list of groups can be
116 configured using the existing API function mbedtls_ssl_conf_groups().
117 * Improve mbedtls_x509_time performance and reduce memory use.
118 * Reduce syscalls to time() during certificate verification.
119 * Allow MBEDTLS_CONFIG_FILE and MBEDTLS_USER_CONFIG_FILE to be set by
120 setting the CMake variable of the same name at configuration time.
121 * Add getter (mbedtls_ssl_cache_get_timeout()) to access
122 `mbedtls_ssl_cache_context.timeout`.
123 * Add getter (mbedtls_ssl_get_hostname()) to access
124 `mbedtls_ssl_context.hostname`.
125 * Add getter (mbedtls_ssl_conf_get_endpoint()) to access
126 `mbedtls_ssl_config.endpoint`.
127 * Support for "opaque" (PSA-held) ECC keys in the PK module has been
128 extended: it is now possible to use mbedtls_pk_write_key_der(),
129 mbedtls_pk_write_key_pem(), mbedtls_pk_check_pair(), and
130 mbedtls_pk_verify() with opaque ECC keys (provided the PSA attributes
131 allow it).
132 * The documentation of mbedtls_ecp_group now describes the optimized
133 representation of A for some curves. Fixes #8045.
134 * Add a possibility to generate CSR's with RCF822 and directoryName subtype
135 of subjectAltName extension in x509 certificates.
136 * Add support for PBKDF2-CMAC through the PSA API.
137 * New configuration option MBEDTLS_AES_USE_HARDWARE_ONLY introduced. When
138 using CPU-accelerated AES (e.g., Arm Crypto Extensions), this option
139 disables the plain C implementation and the run-time detection for the
140 CPU feature, which reduces code size and avoids the vulnerability of the
141 plain C implementation.
142 * Accept arbitrary AttributeType and AttributeValue in certificate
143 Distinguished Names using RFC 4514 syntax.
144 * Applications using ECC over secp256r1 through the PSA API can use a
145 new implementation with a much smaller footprint, but some minor
146 usage restrictions. See the documentation of the new configuration
147 option MBEDTLS_PSA_P256M_DRIVER_ENABLED for details.
148
149Security
150 * Fix a case where potentially sensitive information held in memory would not
151 be completely zeroized during TLS 1.2 handshake, in both server and client
152 configurations.
153 * In configurations with ARIA or Camellia but not AES, the value of
154 MBEDTLS_CIPHER_BLKSIZE_MAX was 8, rather than 16 as the name might
155 suggest. This did not affect any library code, because this macro was
156 only used in relation with CMAC which does not support these ciphers.
157 This may affect application code that uses this macro.
158 * Developers using mbedtls_pkcs5_pbes2() or mbedtls_pkcs12_pbe() should
159 review the size of the output buffer passed to this function, and note
160 that the output after decryption may include CBC padding. Consider moving
161 to the new functions mbedtls_pkcs5_pbes2_ext() or mbedtls_pkcs12_pbe_ext()
162 which checks for overflow of the output buffer and reports the actual
163 length of the output.
164 * Improve padding calculations in CBC decryption, NIST key unwrapping and
165 RSA OAEP decryption. With the previous implementation, some compilers
166 (notably recent versions of Clang and IAR) could produce non-constant
167 time code, which could allow a padding oracle attack if the attacker
168 has access to precise timing measurements.
169 * Updates to constant-time C code so that compilers are less likely to use
170 conditional instructions, which can have an observable difference in
171 timing. (Clang has been seen to do this.) Also introduce assembly
172 implementations for 32- and 64-bit Arm and for x86 and x86-64, which are
173 guaranteed not to use conditional instructions.
174 * Fix definition of MBEDTLS_MD_MAX_BLOCK_SIZE, which was too
175 small when MBEDTLS_SHA384_C was defined and MBEDTLS_SHA512_C was
176 undefined. Mbed TLS itself was unaffected by this, but user code
177 which used MBEDTLS_MD_MAX_BLOCK_SIZE could be affected. The only
178 release containing this bug was Mbed TLS 3.4.0.
179 * Fix a buffer overread when parsing short TLS application data records in
180 null-cipher cipher suites. Credit to OSS-Fuzz.
181 * Fix a remotely exploitable heap buffer overflow in TLS handshake parsing.
182 In TLS 1.3, all configurations are affected except PSK-only ones, and
183 both clients and servers are affected.
184 In TLS 1.2, the affected configurations are those with
185 MBEDTLS_USE_PSA_CRYPTO and ECDH enabled but DHM and RSA disabled,
186 and only servers are affected, not clients.
187 Credit to OSS-Fuzz.
188
189Bugfix
190 * Fix proper sizing for PSA_EXPORT_[KEY_PAIR/PUBLIC_KEY]_MAX_SIZE and
191 PSA_SIGNATURE_MAX_SIZE buffers when at least one accelerated EC is bigger
192 than all built-in ones and RSA is disabled.
193 Resolves #6622.
194 * Add missing md.h includes to some of the external programs from
195 the programs directory. Without this, even though the configuration
196 was sufficient for a particular program to work, it would only print
197 a message that one of the required defines is missing.
198 * Fix declaration of mbedtls_ecdsa_sign_det_restartable() function
199 in the ecdsa.h header file. There was a build warning when the
200 configuration macro MBEDTLS_ECDSA_SIGN_ALT was defined.
201 Resolves #7407.
202 * Fix an error when MBEDTLS_ECDSA_SIGN_ALT is defined but not
203 MBEDTLS_ECDSA_VERIFY_ALT, causing ecdsa verify to fail. Fixes #7498.
204 * Fix missing PSA initialization in sample programs when
205 MBEDTLS_USE_PSA_CRYPTO is enabled.
206 * Fix the J-PAKE driver interface for user and peer to accept any values
207 (previously accepted values were limited to "client" or "server").
208 * Fix clang and armclang compilation error when targeting certain Arm
209 M-class CPUs (Cortex-M0, Cortex-M0+, Cortex-M1, Cortex-M23,
210 SecurCore SC000). Fixes #1077.
211 * Fix "unterminated '#pragma clang attribute push'" in sha256/sha512.c when
212 built with MBEDTLS_SHAxxx_USE_A64_CRYPTO_IF_PRESENT but don't have a
213 way to detect the crypto extensions required. A warning is still issued.
214 * Fixed an issue that caused compile errors when using CMake and the IAR
215 toolchain.
216 * Fix very high stack usage in SSL debug code. Reported by Maximilian
217 Gerhardt in #7804.
218 * Fix a compilation failure in the constant_time module when
219 building for arm64_32 (e.g., for watchos). Reported by Paulo
220 Coutinho in #7787.
221 * Fix crypt_and_hash decryption fail when used with a stream cipher
222 mode of operation due to the input not being multiple of block size.
223 Resolves #7417.
224 * Fix a bug in which mbedtls_x509_string_to_names() would return success
225 when given a invalid name string if it did not contain '=' or ','.
226 * Fix compilation warnings in aes.c, which prevented the
227 example TF-M configuration in configs/ from building cleanly:
228 tfm_mbedcrypto_config_profile_medium.h with
229 crypto_config_profile_medium.h.
230 * In TLS 1.3, fix handshake failure when a client in its ClientHello
231 proposes an handshake based on PSK only key exchange mode or at least
232 one of the key exchange modes using ephemeral keys to a server that
233 supports only the PSK key exchange mode.
234 * Fix CCM* with no tag being not supported in a build with CCM as the only
235 symmetric encryption algorithm and the PSA configuration enabled.
236 * Fix the build with MBEDTLS_PSA_INJECT_ENTROPY. Fixes #7516.
237 * Fix a compilation error on some platforms when including mbedtls/ssl.h
238 with all TLS support disabled. Fixes #6628.
239 * Fix x509 certificate generation to conform to RFC 5480 / RFC 5758 when
240 using ECC key. The certificate was rejected by some crypto frameworks.
241 Fixes #2924.
242 * Fix a potential corruption of the passed-in IV when mbedtls_aes_crypt_cbc()
243 is called with zero length and padlock is not enabled.
244 * Fix compile failure due to empty enum in cipher_wrap.c, when building
245 with a very minimal configuration. Fixes #7625.
246 * Fix some cases where mbedtls_mpi_mod_exp, RSA key construction or ECDSA
247 signature can silently return an incorrect result in low memory conditions.
248 * Don't try to include MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE when
249 MBEDTLS_PSA_CRYPTO_CONFIG is disabled.
250 * Fix IAR compiler warnings.
251 * Fix an issue when parsing an otherName subject alternative name into a
252 mbedtls_x509_san_other_name struct. The type-id of the otherName was not
253 copied to the struct. This meant that the struct had incomplete
254 information about the otherName SAN and contained uninitialized memory.
255 * Fix the detection of HardwareModuleName otherName SANs. These were being
256 detected by comparing the wrong field and the check was erroneously
257 inverted.
258 * Fix a build error in some configurations with MBEDTLS_PSA_CRYPTO_CONFIG
259 enabled, where some low-level modules required by requested PSA crypto
260 features were not getting automatically enabled. Fixes #7420.
261 * Fix undefined symbols in some builds using TLS 1.3 with a custom
262 configuration file.
263 * Fix log level for the got supported group message. Fixes #6765
264 * Functions in the ssl_cache module now return a negative MBEDTLS_ERR_xxx
265 error code on failure. Before, they returned 1 to indicate failure in
266 some cases involving a missing entry or a full cache.
267 * mbedtls_pk_parse_key() now rejects trailing garbage in encrypted keys.
268
269Changes
270 * Enable Arm / Thumb bignum assembly for most Arm platforms when
271 compiling with gcc, clang or armclang and -O0.
272 * Enforce minimum RSA key size when generating a key
273 to avoid accidental misuse.
274 * Use heap memory to allocate DER encoded RSA private key.
275 This reduces stack usage significantly for RSA signature
276 operations when MBEDTLS_PSA_CRYPTO_C is defined.
277 * Update Windows code to use BCryptGenRandom and wcslen, and
278 ensure that conversions between size_t, ULONG, and int are
279 always done safely. Original contribution by Kevin Kane #635, #730
280 followed by Simon Butcher #1453.
281 * Users intergrating their own PSA drivers should be aware that
282 the file library/psa_crypto_driver_wrappers.c has been renamed
283 to psa_crypto_driver_wrappers_no_static.c.
284 * When using CBC with the cipher module, the requirement to call
285 mbedtls_cipher_set_padding_mode() is now enforced. Previously, omitting
286 this call accidentally applied a default padding mode chosen at compile
287 time.
288
Gilles Peskine4a415fd2023-08-02 12:51:44 +0200289= Mbed TLS 3.4.1 branch released 2023-08-04
Gilles Peskine82c159f2023-08-02 12:51:01 +0200290
291Bugfix
292 * Fix builds on Windows with clang
293
294Changes
295 * Update test data to avoid failures of unit tests after 2023-08-07.
296
Paul Elliottdbe435c2023-03-23 10:43:15 +0000297= Mbed TLS 3.4.0 branch released 2023-03-28
298
299Default behavior changes
300 * The default priority order of TLS 1.3 cipher suites has been modified to
301 follow the same rules as the TLS 1.2 cipher suites (see
302 ssl_ciphersuites.c). The preferred cipher suite is now
303 TLS_CHACHA20_POLY1305_SHA256.
304
305New deprecations
306 * mbedtls_x509write_crt_set_serial() is now being deprecated in favor of
307 mbedtls_x509write_crt_set_serial_raw(). The goal here is to remove any
308 direct dependency of X509 on BIGNUM_C.
309 * PSA to mbedtls error translation is now unified in psa_util.h,
310 deprecating mbedtls_md_error_from_psa. Each file that performs error
311 translation should define its own version of PSA_TO_MBEDTLS_ERR,
312 optionally providing file-specific error pairs. Please see psa_util.h for
313 more details.
314
315Features
316 * Added partial support for parsing the PKCS #7 Cryptographic Message
317 Syntax, as defined in RFC 2315. Currently, support is limited to the
318 following:
319 - Only the signed-data content type, version 1 is supported.
320 - Only DER encoding is supported.
321 - Only a single digest algorithm per message is supported.
322 - Certificates must be in X.509 format. A message must have either 0
323 or 1 certificates.
324 - There is no support for certificate revocation lists.
325 - The authenticated and unauthenticated attribute fields of SignerInfo
326 must be empty.
327 Many thanks to Daniel Axtens, Nayna Jain, and Nick Child from IBM for
328 contributing this feature, and to Demi-Marie Obenour for contributing
329 various improvements, tests and bug fixes.
330 * General performance improvements by accessing multiple bytes at a time.
331 Fixes #1666.
332 * Improvements to use of unaligned and byte-swapped memory, reducing code
333 size and improving performance (depending on compiler and target
334 architecture).
335 * Add support for reading points in compressed format
336 (MBEDTLS_ECP_PF_COMPRESSED) with mbedtls_ecp_point_read_binary()
337 (and callers) for Short Weierstrass curves with prime p where p = 3 mod 4
338 (all mbedtls MBEDTLS_ECP_DP_SECP* and MBEDTLS_ECP_DP_BP* curves
339 except MBEDTLS_ECP_DP_SECP224R1 and MBEDTLS_ECP_DP_SECP224K1)
340 * SHA224_C/SHA384_C are now independent from SHA384_C/SHA512_C respectively.
341 This helps in saving code size when some of the above hashes are not
342 required.
343 * Add parsing of V3 extensions (key usage, Netscape cert-type,
344 Subject Alternative Names) in x509 Certificate Sign Requests.
345 * Use HOSTCC (if it is set) when compiling C code during generation of the
346 configuration-independent files. This allows them to be generated when
347 CC is set for cross compilation.
348 * Add parsing of uniformResourceIdentifier subtype for subjectAltName
349 extension in x509 certificates.
350 * Add an interruptible version of sign and verify hash to the PSA interface,
351 backed by internal library support for ECDSA signing and verification.
352 * Add parsing of rfc822Name subtype for subjectAltName
353 extension in x509 certificates.
354 * The configuration macros MBEDTLS_PSA_CRYPTO_PLATFORM_FILE and
355 MBEDTLS_PSA_CRYPTO_STRUCT_FILE specify alternative locations for
356 the headers "psa/crypto_platform.h" and "psa/crypto_struct.h".
357 * When a PSA driver for ECDSA is present, it is now possible to disable
358 MBEDTLS_ECDSA_C in the build in order to save code size. For PK, X.509
359 and TLS to fully work, this requires MBEDTLS_USE_PSA_CRYPTO to be enabled.
360 Restartable/interruptible ECDSA operations in PK, X.509 and TLS are not
361 supported in those builds yet, as driver support for interruptible ECDSA
362 operations is not present yet.
363 * Add a driver dispatch layer for EC J-PAKE, enabling alternative
364 implementations of EC J-PAKE through the driver entry points.
365 * Add new API mbedtls_ssl_cache_remove for cache entry removal by
366 its session id.
367 * Add support to include the SubjectAltName extension to a CSR.
368 * Add support for AES with the Armv8-A Cryptographic Extension on
369 64-bit Arm. A new configuration option, MBEDTLS_AESCE_C, can
370 be used to enable this feature. Run-time detection is supported
371 under Linux only.
372 * When a PSA driver for EC J-PAKE is present, it is now possible to disable
373 MBEDTLS_ECJPAKE_C in the build in order to save code size. For the
374 corresponding TLS 1.2 key exchange to work, MBEDTLS_USE_PSA_CRYPTO needs
375 to be enabled.
376 * Add functions mbedtls_rsa_get_padding_mode() and mbedtls_rsa_get_md_alg()
377 to read non-public fields for padding mode and hash id from
378 an mbedtls_rsa_context, as requested in #6917.
379 * AES-NI is now supported with Visual Studio.
380 * AES-NI is now supported in 32-bit builds, or when MBEDTLS_HAVE_ASM
381 is disabled, when compiling with GCC or Clang or a compatible compiler
382 for a target CPU that supports the requisite instructions (for example
383 gcc -m32 -msse2 -maes -mpclmul). (Generic x86 builds with GCC-like
384 compilers still require MBEDTLS_HAVE_ASM and a 64-bit target.)
385 * It is now possible to use a PSA-held (opaque) password with the TLS 1.2
386 ECJPAKE key exchange, using the new API function
387 mbedtls_ssl_set_hs_ecjpake_password_opaque().
388
389Security
390 * Use platform-provided secure zeroization function where possible, such as
391 explicit_bzero().
392 * Zeroize SSL cache entries when they are freed.
393 * Fix a potential heap buffer overread in TLS 1.3 client-side when
394 MBEDTLS_DEBUG_C is enabled. This may result in an application crash.
395 * Add support for AES with the Armv8-A Cryptographic Extension on 64-bit
396 Arm, so that these systems are no longer vulnerable to timing side-channel
397 attacks. This is configured by MBEDTLS_AESCE_C, which is on by default.
398 Reported by Demi Marie Obenour.
399 * MBEDTLS_AESNI_C, which is enabled by default, was silently ignored on
400 builds that couldn't compile the GCC-style assembly implementation
401 (most notably builds with Visual Studio), leaving them vulnerable to
402 timing side-channel attacks. There is now an intrinsics-based AES-NI
403 implementation as a fallback for when the assembly one cannot be used.
404
405Bugfix
406 * Fix possible integer overflow in mbedtls_timing_hardclock(), which
407 could cause a crash in programs/test/benchmark.
408 * Fix IAR compiler warnings. Fixes #6924.
409 * Fix a bug in the build where directory names containing spaces were
410 causing generate_errors.pl to error out resulting in a build failure.
411 Fixes issue #6879.
412 * In TLS 1.3, when using a ticket for session resumption, tweak its age
413 calculation on the client side. It prevents a server with more accurate
414 ticket timestamps (typically timestamps in milliseconds) compared to the
415 Mbed TLS ticket timestamps (in seconds) to compute a ticket age smaller
416 than the age computed and transmitted by the client and thus potentially
417 reject the ticket. Fix #6623.
418 * Fix compile error where MBEDTLS_RSA_C and MBEDTLS_X509_CRT_WRITE_C are
419 defined, but MBEDTLS_PK_RSA_ALT_SUPPORT is not defined. Fixes #3174.
420 * List PSA_WANT_ALG_CCM_STAR_NO_TAG in psa/crypto_config.h so that it can
421 be toggled with config.py.
422 * The key derivation algorithm PSA_ALG_TLS12_ECJPAKE_TO_PMS cannot be
423 used on a shared secret from a key agreement since its input must be
424 an ECC public key. Reject this properly.
425 * mbedtls_x509write_crt_set_serial() now explicitly rejects serial numbers
426 whose binary representation is longer than 20 bytes. This was already
427 forbidden by the standard (RFC5280 - section 4.1.2.2) and now it's being
428 enforced also at code level.
429 * Fix potential undefined behavior in mbedtls_mpi_sub_abs(). Reported by
430 Pascal Cuoq using TrustInSoft Analyzer in #6701; observed independently by
431 Aaron Ucko under Valgrind.
432 * Fix behavior of certain sample programs which could, when run with no
433 arguments, access uninitialized memory in some cases. Fixes #6700 (which
434 was found by TrustInSoft Analyzer during REDOCS'22) and #1120.
435 * Fix parsing of X.509 SubjectAlternativeName extension. Previously,
436 malformed alternative name components were not caught during initial
437 certificate parsing, but only on subsequent calls to
438 mbedtls_x509_parse_subject_alt_name(). Fixes #2838.
439 * Make the fields of mbedtls_pk_rsassa_pss_options public. This makes it
440 possible to verify RSA PSS signatures with the pk module, which was
441 inadvertently broken since Mbed TLS 3.0.
442 * Fix bug in conversion from OID to string in
443 mbedtls_oid_get_numeric_string(). OIDs such as 2.40.0.25 are now printed
444 correctly.
445 * Reject OIDs with overlong-encoded subidentifiers when converting
446 them to a string.
447 * Reject OIDs with subidentifier values exceeding UINT_MAX. Such
448 subidentifiers can be valid, but Mbed TLS cannot currently handle them.
449 * Reject OIDs that have unterminated subidentifiers, or (equivalently)
450 have the most-significant bit set in their last byte.
451 * Silence warnings from clang -Wdocumentation about empty \retval
452 descriptions, which started appearing with Clang 15. Fixes #6960.
453 * Fix the handling of renegotiation attempts in TLS 1.3. They are now
454 systematically rejected.
455 * Fix an unused-variable warning in TLS 1.3-only builds if
456 MBEDTLS_SSL_RENEGOTIATION was enabled. Fixes #6200.
457 * Fix undefined behavior in mbedtls_ssl_read() and mbedtls_ssl_write() if
458 len argument is 0 and buffer is NULL.
459 * Allow setting user and peer identifiers for EC J-PAKE operation
460 instead of role in PAKE PSA Crypto API as described in the specification.
461 This is a partial fix that allows only "client" and "server" identifiers.
462 * Fix a compilation error when PSA Crypto is built with support for
463 TLS12_PRF but not TLS12_PSK_TO_MS. Reported by joerchan in #7125.
464 * In the TLS 1.3 server, select the preferred client cipher suite, not the
465 least preferred. The selection error was introduced in Mbed TLS 3.3.0.
466 * Fix TLS 1.3 session resumption when the established pre-shared key is
467 384 bits long. That is the length of pre-shared keys created under a
468 session where the cipher suite is TLS_AES_256_GCM_SHA384.
469 * Fix an issue when compiling with MBEDTLS_SHA512_USE_A64_CRYPTO_IF_PRESENT
470 enabled, which required specifying compiler flags enabling SHA3 Crypto
471 Extensions, where some compilers would emit EOR3 instructions in other
472 modules, which would then fail if run on a CPU without the SHA3
473 extensions. Fixes #5758.
474
475Changes
476 * Install the .cmake files into CMAKE_INSTALL_LIBDIR/cmake/MbedTLS,
477 typically /usr/lib/cmake/MbedTLS.
478 * Mixed-endian systems are explicitly not supported any more.
479 * When MBEDTLS_USE_PSA_CRYPTO and MBEDTLS_ECDSA_DETERMINISTIC are both
480 defined, mbedtls_pk_sign() now use deterministic ECDSA for ECDSA
481 signatures. This aligns the behaviour with MBEDTLS_USE_PSA_CRYPTO to
482 the behaviour without it, where deterministic ECDSA was already used.
483 * Visual Studio: Rename the directory containing Visual Studio files from
484 visualc/VS2010 to visualc/VS2013 as we do not support building with versions
485 older than 2013. Update the solution file to specify VS2013 as a minimum.
486 * programs/x509/cert_write:
487 - now it accepts the serial number in 2 different formats: decimal and
488 hex. They cannot be used simultaneously
489 - "serial" is used for the decimal format and it's limted in size to
490 unsigned long long int
491 - "serial_hex" is used for the hex format; max length here is
492 MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN*2
493 * The C code follows a new coding style. This is transparent for users but
494 affects contributors and maintainers of local patches. For more
495 information, see
496 https://mbed-tls.readthedocs.io/en/latest/kb/how-to/rewrite-branch-for-coding-style/
497 * Changed the default MBEDTLS_ECP_WINDOW_SIZE from 6 to 2.
498 As tested in issue 6790, the correlation between this define and
499 RSA decryption performance has changed lately due to security fixes.
500 To fix the performance degradation when using default values the
501 window was reduced from 6 to 2, a value that gives the best or close
502 to best results when tested on Cortex-M4 and Intel i7.
503 * When enabling MBEDTLS_SHA256_USE_A64_CRYPTO_* or
504 MBEDTLS_SHA512_USE_A64_CRYPTO_*, it is no longer necessary to specify
505 compiler target flags on the command line; the library now sets target
506 options within the appropriate modules.
507
Dave Rodgman69591e92022-12-08 14:59:54 +0000508= Mbed TLS 3.3.0 branch released 2022-12-14
509
Dave Rodgman69591e92022-12-08 14:59:54 +0000510Default behavior changes
511 * Previously the macro MBEDTLS_SSL_DTLS_CONNECTION_ID implemented version 05
512 of the IETF draft, and was marked experimental and disabled by default.
513 It is now no longer experimental, and implements the final version from
514 RFC 9146, which is not interoperable with the draft-05 version.
515 If you need to communicate with peers that use earlier versions of
516 Mbed TLS, then you need to define MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT
517 to 1, but then you won't be able to communicate with peers that use the
518 standard (non-draft) version.
519 If you need to interoperate with both classes of peers with the
520 same build of Mbed TLS, please let us know about your situation on the
521 mailing list or GitHub.
522
523Requirement changes
524 * When building with PSA drivers using generate_driver_wrappers.py, or
525 when building the library from the development branch rather than
526 from a release, the Python module jsonschema is now necessary, in
527 addition to jinja2. The official list of required Python modules is
528 maintained in scripts/basic.requirements.txt and may change again
529 in the future.
530
531New deprecations
532 * Deprecate mbedtls_asn1_free_named_data().
533 Use mbedtls_asn1_free_named_data_list()
534 or mbedtls_asn1_free_named_data_list_shallow().
535
536Features
537 * Support rsa_pss_rsae_* signature algorithms in TLS 1.2.
538 * make: enable building unversioned shared library, with e.g.:
539 "SHARED=1 SOEXT_TLS=so SOEXT_X509=so SOEXT_CRYPTO=so make lib"
540 resulting in library names like "libmbedtls.so" rather than
541 "libmbedcrypto.so.11".
542 * Expose the EC J-PAKE functionality through the Draft PSA PAKE Crypto API.
543 Only the ECC primitive with secp256r1 curve and SHA-256 hash algorithm
544 are supported in this implementation.
545 * Some modules can now use PSA drivers for hashes, including with no
546 built-in implementation present, but only in some configurations.
547 - RSA OAEP and PSS (PKCS#1 v2.1), PKCS5, PKCS12 and EC J-PAKE now use
548 hashes from PSA when (and only when) MBEDTLS_MD_C is disabled.
549 - PEM parsing of encrypted files now uses MD-5 from PSA when (and only
550 when) MBEDTLS_MD5_C is disabled.
551 See the documentation of the corresponding macros in mbedtls_config.h for
552 details.
553 Note that some modules are not able to use hashes from PSA yet, including
554 the entropy module. As a consequence, for now the only way to build with
555 all hashes only provided by drivers (no built-in hash) is to use
556 MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG.
557 * When MBEDTLS_USE_PSA_CRYPTO is enabled, X.509, TLS 1.2 and TLS 1.3 now
558 properly negotiate/accept hashes based on their availability in PSA.
559 As a consequence, they now work in configurations where the built-in
560 implementations of (some) hashes are excluded and those hashes are only
561 provided by PSA drivers. (See previous entry for limitation on RSA-PSS
562 though: that module only use hashes from PSA when MBEDTLS_MD_C is off).
563 * Add support for opaque keys as the private keys associated to certificates
564 for authentication in TLS 1.3.
565 * Add the LMS post-quantum-safe stateful-hash asymmetric signature scheme.
566 Signature verification is production-ready, but generation is for testing
567 purposes only. This currently only supports one parameter set
568 (LMS_SHA256_M32_H10), meaning that each private key can be used to sign
569 1024 messages. As such, it is not intended for use in TLS, but instead
570 for verification of assets transmitted over an insecure channel,
571 particularly firmware images.
572 * Add the LM-OTS post-quantum-safe one-time signature scheme, which is
573 required for LMS. This can be used independently, but each key can only
574 be used to sign one message so is impractical for most circumstances.
575 * Mbed TLS now supports TLS 1.3 key establishment via pre-shared keys.
576 The pre-shared keys can be provisioned externally or via the ticket
577 mechanism (session resumption).
578 The ticket mechanism is supported when the configuration option
579 MBEDTLS_SSL_SESSION_TICKETS is enabled.
580 New options MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_xxx_ENABLED
581 control the support for the three possible TLS 1.3 key exchange modes.
582 * cert_write: support for setting extended key usage attributes. A
583 corresponding new public API call has been added in the library,
584 mbedtls_x509write_crt_set_ext_key_usage().
585 * cert_write: support for writing certificate files in either PEM
586 or DER format.
587 * The PSA driver wrapper generator generate_driver_wrappers.py now
588 supports a subset of the driver description language, including
589 the following entry points: import_key, export_key, export_public_key,
590 get_builtin_key, copy_key.
591 * The new functions mbedtls_asn1_free_named_data_list() and
592 mbedtls_asn1_free_named_data_list_shallow() simplify the management
593 of memory in named data lists in X.509 structures.
594 * The TLS 1.2 EC J-PAKE key exchange can now use the PSA Crypto API.
595 Additional PSA key slots will be allocated in the process of such key
596 exchange for builds that enable MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED and
597 MBEDTLS_USE_PSA_CRYPTO.
598 * Add support for DTLS Connection ID as defined by RFC 9146, controlled by
599 MBEDTLS_SSL_DTLS_CONNECTION_ID (enabled by default) and configured with
600 mbedtls_ssl_set_cid().
601 * Add a driver dispatch layer for raw key agreement, enabling alternative
602 implementations of raw key agreement through the key_agreement driver
603 entry point. This entry point is specified in the proposed PSA driver
604 interface, but had not yet been implemented.
Dave Rodgman552e1072022-12-14 17:01:51 +0000605 * Add an ad-hoc key derivation function handling EC J-PAKE to PMS
606 calculation that can be used to derive the session secret in TLS 1.2,
607 as described in draft-cragie-tls-ecjpake-01. This can be achieved by
608 using PSA_ALG_TLS12_ECJPAKE_TO_PMS as the key derivation algorithm.
Dave Rodgman69591e92022-12-08 14:59:54 +0000609
610Security
611 * Fix potential heap buffer overread and overwrite in DTLS if
612 MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and
613 MBEDTLS_SSL_CID_IN_LEN_MAX > 2 * MBEDTLS_SSL_CID_OUT_LEN_MAX.
Tom Cosgroveb3c6a1e2023-03-08 15:47:00 +0000614 * Fix an issue where an adversary with access to precise enough information
615 about memory accesses (typically, an untrusted operating system attacking
616 a secure enclave) could recover an RSA private key after observing the
617 victim performing a single private-key operation if the window size used
618 for the exponentiation was 3 or smaller. Found and reported by Zili KOU,
Dave Rodgman69591e92022-12-08 14:59:54 +0000619 Wenjian HE, Sharad Sinha, and Wei ZHANG. See "Cache Side-channel Attacks
620 and Defenses of the Sliding Window Algorithm in TEEs" - Design, Automation
621 and Test in Europe 2023.
622
623Bugfix
624 * Refactor mbedtls_aes_context to support shallow-copying. Fixes #2147.
625 * Fix an issue with in-tree CMake builds in releases with GEN_FILES
626 turned off: if a shipped file was missing from the working directory,
627 it could be turned into a symbolic link to itself.
628 * Fix a long-standing build failure when building x86 PIC code with old
629 gcc (4.x). The code will be slower, but will compile. We do however
630 recommend upgrading to a more recent compiler instead. Fixes #1910.
631 * Fix support for little-endian Microblaze when MBEDTLS_HAVE_ASM is defined.
632 Contributed by Kazuyuki Kimura to fix #2020.
633 * Use double quotes to include private header file psa_crypto_cipher.h.
634 Fixes 'file not found with <angled> include' error
635 when building with Xcode.
636 * Fix handling of broken symlinks when loading certificates using
637 mbedtls_x509_crt_parse_path(). Instead of returning an error as soon as a
638 broken link is encountered, skip the broken link and continue parsing
639 other certificate files. Contributed by Eduardo Silva in #2602.
640 * Fix an interoperability failure between an Mbed TLS client with both
641 TLS 1.2 and TLS 1.3 support, and a TLS 1.2 server that supports
642 rsa_pss_rsae_* signature algorithms. This failed because Mbed TLS
643 advertised support for PSS in both TLS 1.2 and 1.3, but only
644 actually supported PSS in TLS 1.3.
645 * Fix a compilation error when using CMake with an IAR toolchain.
646 Fixes #5964.
647 * Fix a build error due to a missing prototype warning when
648 MBEDTLS_DEPRECATED_REMOVED is enabled.
649 * Fix mbedtls_ctr_drbg_free() on an initialized but unseeded context. When
650 MBEDTLS_AES_ALT is enabled, it could call mbedtls_aes_free() on an
651 uninitialized context.
652 * Fix a build issue on Windows using CMake where the source and build
653 directories could not be on different drives. Fixes #5751.
654 * Fix bugs and missing dependencies when building and testing
655 configurations with only one encryption type enabled in TLS 1.2.
656 * Provide the missing definition of mbedtls_setbuf() in some configurations
657 with MBEDTLS_PLATFORM_C disabled. Fixes #6118, #6196.
658 * Fix compilation errors when trying to build with
659 PSA drivers for AEAD (GCM, CCM, Chacha20-Poly1305).
660 * Fix memory leak in ssl_parse_certificate_request() caused by
661 mbedtls_x509_get_name() not freeing allocated objects in case of error.
662 Change mbedtls_x509_get_name() to clean up allocated objects on error.
663 * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not
664 MBEDTLS_USE_PSA_CRYPTO or MBEDTLS_PK_WRITE_C. Fixes #6408.
665 * Fix build failure with MBEDTLS_RSA_C and MBEDTLS_PSA_CRYPTO_C but not
666 MBEDTLS_PK_PARSE_C. Fixes #6409.
667 * Fix ECDSA verification, where it was not always validating the
668 public key. This bug meant that it was possible to verify a
669 signature with an invalid public key, in some cases. Reported by
670 Guido Vranken using Cryptofuzz in #4420.
671 * Fix a possible null pointer dereference if a memory allocation fails
672 in TLS PRF code. Reported by Michael Madsen in #6516.
673 * Fix TLS 1.3 session resumption. Fixes #6488.
674 * Add a configuration check to exclude optional client authentication
675 in TLS 1.3 (where it is forbidden).
676 * Fix a bug in which mbedtls_x509_crt_info() would produce non-printable
677 bytes when parsing certificates containing a binary RFC 4108
678 HardwareModuleName as a Subject Alternative Name extension. Hardware
679 serial numbers are now rendered in hex format. Fixes #6262.
680 * Fix bug in error reporting in dh_genprime.c where upon failure,
681 the error code returned by mbedtls_mpi_write_file() is overwritten
682 and therefore not printed.
683 * In the bignum module, operations of the form (-A) - (+A) or (-A) - (-A)
684 with A > 0 created an unintended representation of the value 0 which was
685 not processed correctly by some bignum operations. Fix this. This had no
686 consequence on cryptography code, but might affect applications that call
687 bignum directly and use negative numbers.
688 * Fix a bug whereby the list of signature algorithms sent as part of
689 the TLS 1.2 server certificate request would get corrupted, meaning the
690 first algorithm would not get sent and an entry consisting of two random
691 bytes would be sent instead. Found by Serban Bejan and Dudek Sebastian.
692 * Fix undefined behavior (typically harmless in practice) of
693 mbedtls_mpi_add_mpi(), mbedtls_mpi_add_abs() and mbedtls_mpi_add_int()
694 when both operands are 0 and the left operand is represented with 0 limbs.
695 * Fix undefined behavior (typically harmless in practice) when some bignum
696 functions receive the most negative value of mbedtls_mpi_sint. Credit
697 to OSS-Fuzz. Fixes #6597.
698 * Fix undefined behavior (typically harmless in practice) in PSA ECB
699 encryption and decryption.
700 * Move some SSL-specific code out of libmbedcrypto where it had been placed
701 accidentally.
702 * Fix a build error when compiling the bignum module for some Arm platforms.
703 Fixes #6089, #6124, #6217.
704
705Changes
706 * Add the ability to query PSA_WANT_xxx macros to query_compile_time_config.
707 * Calling AEAD tag-specific functions for non-AEAD algorithms (which
708 should not be done - they are documented for use only by AES-GCM and
709 ChaCha20+Poly1305) now returns MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE
710 instead of success (0).
711
Paul Elliott869298b2022-07-12 10:39:42 +0100712= Mbed TLS 3.2.1 branch released 2022-07-12
713
714Bugfix
Paul Elliott4ecb1b52022-09-20 14:33:13 +0100715 * Re-add missing generated file library/psa_crypto_driver_wrappers.c
Paul Elliott869298b2022-07-12 10:39:42 +0100716
Paul Elliott2238eed2022-07-08 18:19:12 +0100717= Mbed TLS 3.2.0 branch released 2022-07-11
718
719Default behavior changes
720 * mbedtls_cipher_set_iv will now fail with ChaCha20 and ChaCha20+Poly1305
721 for IV lengths other than 12. The library was silently overwriting this
722 length with 12, but did not inform the caller about it. Fixes #4301.
723
724Requirement changes
725 * The library will no longer compile out of the box on a platform without
726 setbuf(). If your platform does not have setbuf(), you can configure an
727 alternative function by enabling MBEDTLS_PLATFORM_SETBUF_ALT or
728 MBEDTLS_PLATFORM_SETBUF_MACRO.
729
730New deprecations
731 * Deprecate mbedtls_ssl_conf_max_version() and
732 mbedtls_ssl_conf_min_version() in favor of
733 mbedtls_ssl_conf_max_tls_version() and
734 mbedtls_ssl_conf_min_tls_version().
735 * Deprecate mbedtls_cipher_setup_psa(). Use psa_aead_xxx() or
736 psa_cipher_xxx() directly instead.
737 * Secure element drivers enabled by MBEDTLS_PSA_CRYPTO_SE_C are deprecated.
738 This was intended as an experimental feature, but had not been explicitly
739 documented as such. Use opaque drivers with the interface enabled by
740 MBEDTLS_PSA_CRYPTO_DRIVERS instead.
741 * Deprecate mbedtls_ssl_conf_sig_hashes() in favor of the more generic
742 mbedtls_ssl_conf_sig_algs(). Signature algorithms for the TLS 1.2 and
743 TLS 1.3 handshake should now be configured with
744 mbedtls_ssl_conf_sig_algs().
745
746Features
747 * Add accessor to obtain ciphersuite id from ssl context.
748 * Add accessors to get members from ciphersuite info.
749 * Add mbedtls_ssl_ticket_rotate() for external ticket rotation.
750 * Add accessor to get the raw buffer pointer from a PEM context.
751 * The structures mbedtls_ssl_config and mbedtls_ssl_context now store
752 a piece of user data which is reserved for the application. The user
753 data can be either a pointer or an integer.
754 * Add an accessor function to get the configuration associated with
755 an SSL context.
756 * Add a function to access the protocol version from an SSL context in a
757 form that's easy to compare. Fixes #5407.
758 * Add function mbedtls_md_info_from_ctx() to recall the message digest
759 information that was used to set up a message digest context.
760 * Add ALPN support in TLS 1.3 clients.
761 * Add server certificate selection callback near end of Client Hello.
762 Register callback with mbedtls_ssl_conf_cert_cb().
763 * Provide mechanism to reset handshake cert list by calling
764 mbedtls_ssl_set_hs_own_cert() with NULL value for own_cert param.
765 * Add accessor mbedtls_ssl_get_hs_sni() to retrieve SNI from within
766 cert callback (mbedtls_ssl_conf_cert_cb()) during handshake.
767 * The X.509 module now uses PSA hash acceleration if present.
768 * Add support for psa crypto key derivation for elliptic curve
769 keys. Fixes #3260.
770 * Add function mbedtls_timing_get_final_delay() to access the private
771 final delay field in an mbedtls_timing_delay_context, as requested in
772 #5183.
773 * Add mbedtls_pk_sign_ext() which allows generating RSA-PSS signatures when
774 PSA Crypto is enabled.
775 * Add function mbedtls_ecp_export() to export ECP key pair parameters.
776 Fixes #4838.
777 * Add function mbedtls_ssl_is_handshake_over() to enable querying if the SSL
778 Handshake has completed or not, and thus whether to continue calling
779 mbedtls_ssl_handshake_step(), requested in #4383.
780 * Add the function mbedtls_ssl_get_own_cid() to access our own connection id
781 within mbedtls_ssl_context, as requested in #5184.
782 * Introduce mbedtls_ssl_hs_cb_t typedef for use with
783 mbedtls_ssl_conf_cert_cb() and perhaps future callbacks
784 during TLS handshake.
785 * Add functions mbedtls_ssl_conf_max_tls_version() and
786 mbedtls_ssl_conf_min_tls_version() that use a single value to specify
787 the protocol version.
788 * Extend the existing PSA_ALG_TLS12_PSK_TO_MS() algorithm to support
789 mixed-PSK. Add an optional input PSA_KEY_DERIVATION_INPUT_OTHER_SECRET
790 holding the other secret.
791 * When MBEDTLS_PSA_CRYPTO_CONFIG is enabled, you may list the PSA crypto
792 feature requirements in the file named by the new macro
793 MBEDTLS_PSA_CRYPTO_CONFIG_FILE instead of the default psa/crypto_config.h.
794 Furthermore you may name an additional file to include after the main
795 file with the macro MBEDTLS_PSA_CRYPTO_USER_CONFIG_FILE.
796 * Add the function mbedtls_x509_crt_has_ext_type() to access the ext types
797 field within mbedtls_x509_crt context, as requested in #5585.
798 * Add HKDF-Expand and HKDF-Extract as separate algorithms in the PSA API.
799 * Add support for the ARMv8 SHA-2 acceleration instructions when building
800 for Aarch64.
801 * Add support for authentication of TLS 1.3 clients by TLS 1.3 servers.
802 * Add support for server HelloRetryRequest message. The TLS 1.3 client is
803 now capable of negotiating another shared secret if the one sent in its
804 first ClientHello was not suitable to the server.
805 * Add support for client-side TLS version negotiation. If both TLS 1.2 and
806 TLS 1.3 protocols are enabled in the build of Mbed TLS, the TLS client now
807 negotiates TLS 1.3 or TLS 1.2 with TLS servers.
808 * Enable building of Mbed TLS with TLS 1.3 protocol support but without TLS
809 1.2 protocol support.
810 * Mbed TLS provides an implementation of a TLS 1.3 server (ephemeral key
811 establishment only). See docs/architecture/tls13-support.md for a
812 description of the support. The MBEDTLS_SSL_PROTO_TLS1_3 and
813 MBEDTLS_SSL_SRV_C configuration options control this.
814 * Add accessors to configure DN hints for certificate request:
815 mbedtls_ssl_conf_dn_hints() and mbedtls_ssl_set_hs_dn_hints()
816 * The configuration option MBEDTLS_USE_PSA_CRYPTO, which previously
817 affected only a limited subset of crypto operations in TLS, X.509 and PK,
818 now causes most of them to be done using PSA Crypto; see
819 docs/use-psa-crypto.md for the list of exceptions.
820 * The function mbedtls_pk_setup_opaque() now supports RSA key pairs as well.
821 Opaque keys can now be used everywhere a private key is expected in the
822 TLS and X.509 modules.
823 * Opaque pre-shared keys for TLS, provisioned with
824 mbedtls_ssl_conf_psk_opaque() or mbedtls_ssl_set_hs_psk_opaque(), which
825 previously only worked for "pure" PSK key exchange, now can also be used
826 for the "mixed" PSK key exchanges as well: ECDHE-PSK, DHE-PSK, RSA-PSK.
827 * cmake now detects if it is being built as a sub-project, and in that case
828 disables the target export/installation and package configuration.
829 * Make USE_PSA_CRYPTO compatible with KEY_ID_ENCODES_OWNER. Fixes #5259.
830 * Add example programs cipher_aead_demo.c, md_hmac_demo.c, aead_demo.c
831 and hmac_demo.c, which use PSA and the md/cipher interfaces side
832 by side in order to illustrate how the operation is performed in PSA.
833 Addresses #5208.
834
835Security
836 * Zeroize dynamically-allocated buffers used by the PSA Crypto key storage
837 module before freeing them. These buffers contain secret key material, and
838 could thus potentially leak the key through freed heap.
839 * Fix potential memory leak inside mbedtls_ssl_cache_set() with
840 an invalid session id length.
841 * Add the platform function mbedtls_setbuf() to allow buffering to be
842 disabled on stdio files, to stop secrets loaded from said files being
843 potentially left in memory after file operations. Reported by
844 Glenn Strauss.
845 * Fix a potential heap buffer overread in TLS 1.2 server-side when
846 MBEDTLS_USE_PSA_CRYPTO is enabled, an opaque key (created with
847 mbedtls_pk_setup_opaque()) is provisioned, and a static ECDH ciphersuite
848 is selected. This may result in an application crash or potentially an
849 information leak.
850 * Fix a buffer overread in DTLS ClientHello parsing in servers with
851 MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE enabled. An unauthenticated client
852 or a man-in-the-middle could cause a DTLS server to read up to 255 bytes
853 after the end of the SSL input buffer. The buffer overread only happens
854 when MBEDTLS_SSL_IN_CONTENT_LEN is less than a threshold that depends on
855 the exact configuration: 258 bytes if using mbedtls_ssl_cookie_check(),
856 and possibly up to 571 bytes with a custom cookie check function.
857 Reported by the Cybeats PSI Team.
858 * Fix a buffer overread in TLS 1.3 Certificate parsing. An unauthenticated
859 client or server could cause an MbedTLS server or client to overread up
860 to 64 kBytes of data and potentially overread the input buffer by that
861 amount minus the size of the input buffer. As overread data undergoes
862 various checks, the likelihood of reaching the boundary of the input
863 buffer is rather small but increases as its size
864 MBEDTLS_SSL_IN_CONTENT_LEN decreases.
865 * Fix check of certificate key usage in TLS 1.3. The usage of the public key
866 provided by a client or server certificate for authentication was not
867 checked properly when validating the certificate. This could cause a
868 client or server to be able to authenticate itself through a certificate
869 to an Mbed TLS TLS 1.3 server or client while it does not own a proper
870 certificate to do so.
871
872Bugfix
873 * Declare or use PSA_WANT_ALG_CCM_STAR_NO_TAG following the general
874 pattern for PSA_WANT_xxx symbols. Previously you had to specify
875 PSA_WANT_ALG_CCM for PSA_ALG_CCM_STAR_NO_TAG.
876 * Fix a memory leak if mbedtls_ssl_config_defaults() is called twice.
877 * Fixed swap of client and server random bytes when exporting them alongside
878 TLS 1.3 handshake and application traffic secret.
879 * Fix several bugs (warnings, compiler and linker errors, test failures)
880 in reduced configurations when MBEDTLS_USE_PSA_CRYPTO is enabled.
881 * Fix a bug in (D)TLS curve negotiation: when MBEDTLS_USE_PSA_CRYPTO was
882 enabled and an ECDHE-ECDSA or ECDHE-RSA key exchange was used, the
883 client would fail to check that the curve selected by the server for
884 ECDHE was indeed one that was offered. As a result, the client would
885 accept any curve that it supported, even if that curve was not allowed
886 according to its configuration. Fixes #5291.
887 * The TLS 1.3 implementation is now compatible with the
888 MBEDTLS_USE_PSA_CRYPTO configuration option.
889 * Fix unit tests that used 0 as the file UID. This failed on some
890 implementations of PSA ITS. Fixes #3838.
891 * Fix mbedtls_ssl_get_version() not reporting TLSv1.3. Fixes #5406.
892 * Fix API violation in mbedtls_md_process() test by adding a call to
893 mbedtls_md_starts(). Fixes #2227.
894 * Fix compile errors when MBEDTLS_HAVE_TIME is not defined. Add tests
895 to catch bad uses of time.h.
896 * Fix a race condition in out-of-source builds with CMake when generated data
897 files are already present. Fixes #5374.
898 * Fix the library search path when building a shared library with CMake
899 on Windows.
900 * Fix bug in the alert sending function mbedtls_ssl_send_alert_message()
901 potentially leading to corrupted alert messages being sent in case
902 the function needs to be re-called after initially returning
903 MBEDTLS_SSL_WANT_WRITE. Fixes #1916.
904 * In configurations with MBEDTLS_SSL_DTLS_CONNECTION_ID enabled but not
905 MBEDTLS_DEBUG_C, DTLS handshakes using CID would crash due to a null
906 pointer dereference. Fix this. Fixes #3998.
907 The fix was released, but not announced, in Mbed TLS 3.1.0.
908 * Fix incorrect documentation of mbedtls_x509_crt_profile. The previous
909 documentation stated that the `allowed_pks` field applies to signatures
910 only, but in fact it does apply to the public key type of the end entity
911 certificate, too. Fixes #1992.
912 * Fix undefined behavior in mbedtls_asn1_find_named_data(), where val is
913 not NULL and val_len is zero.
914 * Fix compilation error with mingw32. Fixed by Cameron Cawley in #4211.
915 * Fix compilation error when using C++ Builder on Windows. Reported by
916 Miroslav Mastny in #4015.
917 * psa_raw_key_agreement() now returns PSA_ERROR_BUFFER_TOO_SMALL when
918 applicable. Fixes #5735.
919 * Fix a bug in the x25519 example program where the removal of
920 MBEDTLS_ECDH_LEGACY_CONTEXT caused the program not to run. Fixes #4901 and
921 #3191.
922 * Fix a TLS 1.3 handshake failure when the peer Finished message has not
923 been received yet when we first try to fetch it.
924 * Encode X.509 dates before 1/1/2000 as UTCTime rather than
925 GeneralizedTime. Fixes #5465.
926 * Add mbedtls_x509_dn_get_next function to return the next relative DN in
927 an X509 name, to allow walking the name list. Fixes #5431.
928 * Fix order value of curve x448.
929 * Fix string representation of DNs when outputting values containing commas
930 and other special characters, conforming to RFC 1779. Fixes #769.
931 * Silence a warning from GCC 12 in the selftest program. Fixes #5974.
932 * Fix check_config.h to check that we have MBEDTLS_SSL_KEEP_PEER_CERTIFICATE
933 when MBEDTLS_SSL_PROTO_TLS1_3 is specified, and make this and other
934 dependencies explicit in the documentation. Fixes #5610.
935 * Fix mbedtls_asn1_write_mpi() writing an incorrect encoding of 0.
936 * Fix a TLS 1.3 handshake failure when the first attempt to send the client
937 Finished message on the network cannot be satisfied. Fixes #5499.
938 * Fix resource leaks in mbedtls_pk_parse_public_key() in low
939 memory conditions.
940 * Fix server connection identifier setting for outgoing encrypted records
941 on DTLS 1.2 session resumption. After DTLS 1.2 session resumption with
942 connection identifier, the Mbed TLS client now properly sends the server
943 connection identifier in encrypted record headers. Fix #5872.
944 * Fix a null pointer dereference when performing some operations on zero
945 represented with 0 limbs (specifically mbedtls_mpi_mod_int() dividing
946 by 2, and mbedtls_mpi_write_string() in base 2).
947 * Fix record sizes larger than 16384 being sometimes accepted despite being
948 non-compliant. This could not lead to a buffer overflow. In particular,
949 application data size was already checked correctly.
950 * Fix MBEDTLS_SVC_KEY_ID_GET_KEY_ID() and MBEDTLS_SVC_KEY_ID_GET_OWNER_ID()
951 which have been broken, resulting in compilation errors, since Mbed TLS
952 3.0.
953 * Ensure that TLS 1.2 ciphersuite/certificate and key selection takes into
954 account not just the type of the key (RSA vs EC) but also what it can
955 actually do. Resolves #5831.
956 * Fix CMake windows host detection, especially when cross compiling.
957 * Fix an error in make where the absence of a generated file caused
958 make to break on a clean checkout. Fixes #5340.
959 * Work around an MSVC ARM64 compiler bug causing incorrect behaviour
960 in mbedtls_mpi_exp_mod(). Reported by Tautvydas Žilys in #5467.
Dave Rodgman2b52a2e2022-12-12 15:23:44 +0000961 * Removed the prompt to exit from all windows build programs, which was causing
Paul Elliott2238eed2022-07-08 18:19:12 +0100962 issues in CI/CD environments.
963
964Changes
965 * The file library/psa_crypto_driver_wrappers.c is now generated
966 from a template. In the future, the generation will support
967 driver descriptions. For the time being, to customize this file,
968 see docs/proposed/psa-driver-wrappers-codegen-migration-guide.md
969 * Return PSA_ERROR_INVALID_ARGUMENT if the algorithm passed to one-shot
970 AEAD functions is not an AEAD algorithm. This aligns them with the
971 multipart functions, and the PSA Crypto API 1.1 specification.
972 * In mbedtls_pk_parse_key(), if no password is provided, don't allocate a
973 temporary variable on the heap. Suggested by Sergey Kanatov in #5304.
974 * Assume source files are in UTF-8 when using MSVC with CMake.
975 * Fix runtime library install location when building with CMake and MinGW.
976 DLLs are now installed in the bin directory instead of lib.
977 * cmake: Use GnuInstallDirs to customize install directories
978 Replace custom LIB_INSTALL_DIR variable with standard CMAKE_INSTALL_LIBDIR
979 variable. For backward compatibility, set CMAKE_INSTALL_LIBDIR if
980 LIB_INSTALL_DIR is set.
981 * Add a CMake option that enables static linking of the runtime library
982 in Microsoft Visual C++ compiler. Contributed by Microplankton.
983 * In CMake builds, add aliases for libraries so that the normal MbedTLS::*
984 targets work when MbedTLS is built as a subdirectory. This allows the
985 use of FetchContent, as requested in #5688.
Paul Bakker99ed6782011-01-05 14:48:42 +0000986
Ronald Cron1ffa6a52021-12-14 15:57:17 +0100987= mbed TLS 3.1.0 branch released 2021-12-17
Ronald Cron831cf482021-12-15 09:02:38 +0100988
989API changes
990 * New error code for GCM: MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL.
991 Alternative GCM implementations are expected to verify
992 the length of the provided output buffers and to return the
993 MBEDTLS_ERR_GCM_BUFFER_TOO_SMALL in case the buffer length is too small.
994 * You can configure groups for a TLS key exchange with the new function
995 mbedtls_ssl_conf_groups(). It extends mbedtls_ssl_conf_curves().
996 * Declare a number of structure fields as public: the fields of
997 mbedtls_ecp_curve_info, the fields describing the result of ASN.1 and
998 X.509 parsing, and finally the field fd of mbedtls_net_context on
999 POSIX/Unix-like platforms.
1000
1001Requirement changes
1002 * Sign-magnitude and one's complement representations for signed integers are
1003 not supported. Two's complement is the only supported representation.
1004
1005New deprecations
1006 * Deprecate mbedtls_ssl_conf_curves() in favor of the more generic
1007 mbedtls_ssl_conf_groups().
1008
1009Removals
1010 * Remove the partial support for running unit tests via Greentea on Mbed OS,
1011 which had been unmaintained since 2018.
1012
1013Features
1014 * Enable support for Curve448 via the PSA API. Contributed by
1015 Archana Madhavan in #4626. Fixes #3399 and #4249.
1016 * The identifier of the CID TLS extension can be configured by defining
1017 MBEDTLS_TLS_EXT_CID at compile time.
1018 * Implement the PSA multipart AEAD interface, currently supporting
1019 ChaChaPoly and GCM.
1020 * Warn if errors from certain functions are ignored. This is currently
1021 supported on GCC-like compilers and on MSVC and can be configured through
1022 the macro MBEDTLS_CHECK_RETURN. The warnings are always enabled
1023 (where supported) for critical functions where ignoring the return
1024 value is almost always a bug. Enable the new configuration option
1025 MBEDTLS_CHECK_RETURN_WARNING to get warnings for other functions. This
1026 is currently implemented in the AES, DES and md modules, and will be
1027 extended to other modules in the future.
1028 * Add missing PSA macros declared by PSA Crypto API 1.0.0:
1029 PSA_ALG_IS_SIGN_HASH, PSA_ALG_NONE, PSA_HASH_BLOCK_LENGTH, PSA_KEY_ID_NULL.
1030 * Add support for CCM*-no-tag cipher to the PSA.
1031 Currently only 13-byte long IV's are supported.
1032 For decryption a minimum of 16-byte long input is expected.
1033 These restrictions may be subject to change.
Ronald Cron1ffa6a52021-12-14 15:57:17 +01001034 * Add new API mbedtls_ct_memcmp for constant time buffer comparison.
Ronald Cron831cf482021-12-15 09:02:38 +01001035 * Add functions to get the IV and block size from cipher_info structs.
1036 * Add functions to check if a cipher supports variable IV or key size.
1037 * Add the internal implementation of and support for CCM to the PSA multipart
1038 AEAD interface.
1039 * Mbed TLS provides a minimum viable implementation of the TLS 1.3
1040 protocol. See docs/architecture/tls13-support.md for the definition of
1041 the TLS 1.3 Minimum Viable Product (MVP). The MBEDTLS_SSL_PROTO_TLS1_3
1042 configuration option controls the enablement of the support. The APIs
1043 mbedtls_ssl_conf_min_version() and mbedtls_ssl_conf_max_version() allow
1044 to select the 1.3 version of the protocol to establish a TLS connection.
1045 * Add PSA API definition for ARIA.
1046
1047Security
1048 * Zeroize several intermediate variables used to calculate the expected
1049 value when verifying a MAC or AEAD tag. This hardens the library in
1050 case the value leaks through a memory disclosure vulnerability. For
1051 example, a memory disclosure vulnerability could have allowed a
1052 man-in-the-middle to inject fake ciphertext into a DTLS connection.
1053 * In psa_aead_generate_nonce(), do not read back from the output buffer.
1054 This fixes a potential policy bypass or decryption oracle vulnerability
1055 if the output buffer is in memory that is shared with an untrusted
1056 application.
1057 * In psa_cipher_generate_iv() and psa_cipher_encrypt(), do not read back
1058 from the output buffer. This fixes a potential policy bypass or decryption
1059 oracle vulnerability if the output buffer is in memory that is shared with
1060 an untrusted application.
1061 * Fix a double-free that happened after mbedtls_ssl_set_session() or
1062 mbedtls_ssl_get_session() failed with MBEDTLS_ERR_SSL_ALLOC_FAILED
1063 (out of memory). After that, calling mbedtls_ssl_session_free()
1064 and mbedtls_ssl_free() would cause an internal session buffer to
1065 be free()'d twice.
1066
1067Bugfix
1068 * Stop using reserved identifiers as local variables. Fixes #4630.
1069 * The GNU makefiles invoke python3 in preference to python except on Windows.
1070 The check was accidentally not performed when cross-compiling for Windows
1071 on Linux. Fix this. Fixes #4774.
1072 * Prevent divide by zero if either of PSA_CIPHER_ENCRYPT_OUTPUT_SIZE() or
1073 PSA_CIPHER_UPDATE_OUTPUT_SIZE() were called using an asymmetric key type.
1074 * Fix a parameter set but unused in psa_crypto_cipher.c. Fixes #4935.
1075 * Don't use the obsolete header path sys/fcntl.h in unit tests.
1076 These header files cause compilation errors in musl.
1077 Fixes #4969.
1078 * Fix missing constraints on x86_64 and aarch64 assembly code
1079 for bignum multiplication that broke some bignum operations with
1080 (at least) Clang 12.
1081 Fixes #4116, #4786, #4917, #4962.
1082 * Fix mbedtls_cipher_crypt: AES-ECB when MBEDTLS_USE_PSA_CRYPTO is enabled.
1083 * Failures of alternative implementations of AES or DES single-block
1084 functions enabled with MBEDTLS_AES_ENCRYPT_ALT, MBEDTLS_AES_DECRYPT_ALT,
1085 MBEDTLS_DES_CRYPT_ECB_ALT or MBEDTLS_DES3_CRYPT_ECB_ALT were ignored.
1086 This does not concern the implementation provided with Mbed TLS,
1087 where this function cannot fail, or full-module replacements with
1088 MBEDTLS_AES_ALT or MBEDTLS_DES_ALT. Reported by Armelle Duboc in #1092.
1089 * Some failures of HMAC operations were ignored. These failures could only
1090 happen with an alternative implementation of the underlying hash module.
1091 * Fix the error returned by psa_generate_key() for a public key. Fixes #4551.
1092 * Fix compile-time or run-time errors in PSA
1093 AEAD functions when ChachaPoly is disabled. Fixes #5065.
1094 * Remove PSA'a AEAD finish/verify output buffer limitation for GCM.
1095 The requirement of minimum 15 bytes for output buffer in
1096 psa_aead_finish() and psa_aead_verify() does not apply to the built-in
1097 implementation of GCM.
1098 * Move GCM's update output buffer length verification from PSA AEAD to
1099 the built-in implementation of the GCM.
1100 The requirement for output buffer size to be equal or greater then
1101 input buffer size is valid only for the built-in implementation of GCM.
1102 Alternative GCM implementations can process whole blocks only.
1103 * Fix the build of sample programs when neither MBEDTLS_ERROR_C nor
1104 MBEDTLS_ERROR_STRERROR_DUMMY is enabled.
1105 * Fix PSA_ALG_RSA_PSS verification accepting an arbitrary salt length.
1106 This algorithm now accepts only the same salt length for verification
1107 that it produces when signing, as documented. Use the new algorithm
1108 PSA_ALG_RSA_PSS_ANY_SALT to accept any salt length. Fixes #4946.
1109 * The existing predicate macro name PSA_ALG_IS_HASH_AND_SIGN is now reserved
1110 for algorithm values that fully encode the hashing step, as per the PSA
1111 Crypto API specification. This excludes PSA_ALG_RSA_PKCS1V15_SIGN_RAW and
1112 PSA_ALG_ECDSA_ANY. The new predicate macro PSA_ALG_IS_SIGN_HASH covers
1113 all algorithms that can be used with psa_{sign,verify}_hash(), including
1114 these two.
1115 * Fix issue in Makefile on Linux with SHARED=1, that caused shared libraries
1116 not to list other shared libraries they need.
Ronald Cron1ffa6a52021-12-14 15:57:17 +01001117 * Fix a bug in mbedtls_gcm_starts() when the bit length of the iv
1118 exceeds 2^32. Fixes #4884.
Ronald Cron831cf482021-12-15 09:02:38 +01001119 * Fix an uninitialized variable warning in test_suite_ssl.function with GCC
1120 version 11.
1121 * Fix the build when no SHA2 module is included. Fixes #4930.
1122 * Fix the build when only the bignum module is included. Fixes #4929.
1123 * Fix a potential invalid pointer dereference and infinite loop bugs in
1124 pkcs12 functions when the password is empty. Fix the documentation to
1125 better describe the inputs to these functions and their possible values.
1126 Fixes #5136.
1127 * The key usage flags PSA_KEY_USAGE_SIGN_MESSAGE now allows the MAC
1128 operations psa_mac_compute() and psa_mac_sign_setup().
1129 * The key usage flags PSA_KEY_USAGE_VERIFY_MESSAGE now allows the MAC
1130 operations psa_mac_verify() and psa_mac_verify_setup().
1131
1132Changes
1133 * Explicitly mark the fields mbedtls_ssl_session.exported and
1134 mbedtls_ssl_config.respect_cli_pref as private. This was an
1135 oversight during the run-up to the release of Mbed TLS 3.0.
1136 The fields were never intended to be public.
1137 * Implement multi-part CCM API.
1138 The multi-part functions: mbedtls_ccm_starts(), mbedtls_ccm_set_lengths(),
1139 mbedtls_ccm_update_ad(), mbedtls_ccm_update(), mbedtls_ccm_finish()
1140 were introduced in mbedTLS 3.0 release, however their implementation was
1141 postponed until now.
1142 Implemented functions support chunked data input for both CCM and CCM*
1143 algorithms.
1144 * Remove MBEDTLS_SSL_EXPORT_KEYS, making it always on and increasing the
1145 code size by about 80B on an M0 build. This option only gated an ability
1146 to set a callback, but was deemed unnecessary as it was yet another define
1147 to remember when writing tests, or test configurations. Fixes #4653.
1148 * Improve the performance of base64 constant-flow code. The result is still
1149 slower than the original non-constant-flow implementation, but much faster
1150 than the previous constant-flow implementation. Fixes #4814.
1151 * Ignore plaintext/ciphertext lengths for CCM*-no-tag operations.
1152 For CCM* encryption/decryption without authentication, input
1153 length will be ignored.
1154 * Indicate in the error returned if the nonce length used with
1155 ChaCha20-Poly1305 is invalid, and not just unsupported.
Ronald Cron1ffa6a52021-12-14 15:57:17 +01001156 * The mbedcrypto library includes a new source code module constant_time.c,
1157 containing various functions meant to resist timing side channel attacks.
1158 This module does not have a separate configuration option, and functions
1159 from this module will be included in the build as required. Currently
1160 most of the interface of this module is private and may change at any
1161 time.
1162 * The generated configuration-independent files are now automatically
1163 generated by the CMake build system on Unix-like systems. This is not
1164 yet supported when cross-compiling.
Ronald Cron831cf482021-12-15 09:02:38 +01001165
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001166= Mbed TLS 3.0.0 branch released 2021-07-07
Dave Rodgman10ba5532021-04-26 14:58:26 +01001167
1168API changes
1169 * Remove HAVEGE module.
1170 The design of HAVEGE makes it unsuitable for microcontrollers. Platforms
1171 with a more complex CPU usually have an operating system interface that
1172 provides better randomness. Instead of HAVEGE, declare OS or hardware RNG
1173 interfaces with mbedtls_entropy_add_source() and/or use an entropy seed
1174 file created securely during device provisioning. See
Dave Rodgmanb3196842022-10-12 16:47:08 +01001175 https://mbed-tls.readthedocs.io/en/latest/kb/how-to/add-entropy-sources-to-entropy-pool/ for
Dave Rodgman10ba5532021-04-26 14:58:26 +01001176 more information.
1177 * Add missing const attributes to API functions.
1178 * Remove helpers for the transition from Mbed TLS 1.3 to Mbed TLS 2.0: the
1179 header compat-1.3.h and the script rename.pl.
1180 * Remove certs module from the API.
1181 Transfer keys and certificates embedded in the library to the test
1182 component. This contributes to minimizing library API and discourages
1183 users from using unsafe keys in production.
1184 * Move alt helpers and definitions.
1185 Various helpers and definitions available for use in alt implementations
1186 have been moved out of the include/ directory and into the library/
1187 directory. The files concerned are ecp_internal.h and rsa_internal.h
Gilles Peskine6a2fb612021-05-24 22:25:04 +02001188 which have also been renamed to ecp_internal_alt.h and rsa_alt_helpers.h
Dave Rodgman10ba5532021-04-26 14:58:26 +01001189 respectively.
1190 * Move internal headers.
1191 Header files that were only meant for the library's internal use and
1192 were not meant to be used in application code have been moved out of
1193 the include/ directory. The headers concerned are bn_mul.h, aesni.h,
1194 padlock.h, entropy_poll.h and *_internal.h.
1195 * Drop support for parsing SSLv2 ClientHello
1196 (MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO).
1197 * Drop support for SSLv3 (MBEDTLS_SSL_PROTO_SSL3).
Dave Rodgman10ba5532021-04-26 14:58:26 +01001198 * Drop support for TLS record-level compression (MBEDTLS_ZLIB_SUPPORT).
1199 * Drop support for RC4 TLS ciphersuites.
1200 * Drop support for single-DES ciphersuites.
1201 * Drop support for MBEDTLS_SSL_HW_RECORD_ACCEL.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001202 * Update AEAD output size macros to bring them in line with the PSA Crypto
1203 API version 1.0 spec. This version of the spec parameterizes them on the
1204 key type used, as well as the key bit-size in the case of
1205 PSA_AEAD_TAG_LENGTH.
1206 * Add configuration option MBEDTLS_X509_REMOVE_INFO which
1207 removes the mbedtls_x509_*_info(), mbedtls_debug_print_crt()
1208 as well as other functions and constants only used by
1209 those functions. This reduces the code footprint by
1210 several kB.
1211 * Remove SSL error codes `MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED`
1212 and `MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH` which are never
1213 returned from the public SSL API.
1214 * Remove `MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE` and return
1215 `MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL` instead.
Dave Rodgman814b0992021-07-02 12:11:14 +01001216 * The output parameter of mbedtls_sha512_finish, mbedtls_sha512,
1217 mbedtls_sha256_finish and mbedtls_sha256 now has a pointer type
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001218 rather than array type. This removes spurious warnings in some compilers
1219 when outputting a SHA-384 or SHA-224 hash into a buffer of exactly
1220 the hash size.
1221 * Remove the MBEDTLS_TEST_NULL_ENTROPY config option. Fixes #4388.
1222 * The interface of the GCM module has changed to remove restrictions on
1223 how the input to multipart operations is broken down. mbedtls_gcm_finish()
Dave Rodgmaneaef0b72021-07-01 16:59:13 +01001224 now takes extra output parameters for the last partial output block.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001225 mbedtls_gcm_update() now takes extra parameters for the output length.
1226 The software implementation always produces the full output at each
1227 call to mbedtls_gcm_update(), but alternative implementations activated
1228 by MBEDTLS_GCM_ALT may delay partial blocks to the next call to
1229 mbedtls_gcm_update() or mbedtls_gcm_finish(). Furthermore, applications
1230 no longer pass the associated data to mbedtls_gcm_starts(), but to the
1231 new function mbedtls_gcm_update_ad().
1232 These changes are backward compatible for users of the cipher API.
1233 * Replace MBEDTLS_SHA512_NO_SHA384 config option with MBEDTLS_SHA384_C.
1234 This separates config option enabling the SHA384 algorithm from option
1235 enabling the SHA512 algorithm. Fixes #4034.
1236 * Introduce MBEDTLS_SHA224_C.
1237 This separates config option enabling the SHA224 algorithm from option
1238 enabling SHA256.
Dave Rodgman745e3582021-07-05 18:53:31 +01001239 * The getter and setter API of the SSL session cache (used for
1240 session-ID based session resumption) has changed to that of
1241 a key-value store with keys being session IDs and values
1242 being opaque instances of `mbedtls_ssl_session`.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001243 * Remove the mode parameter from RSA operation functions. Signature and
1244 decryption functions now always use the private key and verification and
1245 encryption use the public key. Verification functions also no longer have
1246 RNG parameters.
Dave Rodgman745e3582021-07-05 18:53:31 +01001247 * Modify semantics of `mbedtls_ssl_conf_[opaque_]psk()`:
1248 In Mbed TLS 2.X, the API prescribes that later calls overwrite
1249 the effect of earlier calls. In Mbed TLS 3.0, calling
1250 `mbedtls_ssl_conf_[opaque_]psk()` more than once will fail,
1251 leaving the PSK that was configured first intact.
1252 Support for more than one PSK may be added in 3.X.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001253 * The function mbedtls_x509write_csr_set_extension() has an extra parameter
1254 which allows to mark an extension as critical. Fixes #4055.
1255 * For multi-part AEAD operations with the cipher module, calling
1256 mbedtls_cipher_finish() is now mandatory. Previously the documentation
1257 was unclear on this point, and this function happened to never do
1258 anything with the currently implemented AEADs, so in practice it was
1259 possible to skip calling it, which is no longer supported.
1260 * The option MBEDTLS_ECP_FIXED_POINT_OPTIM use pre-computed comb tables
1261 instead of computing tables in runtime. Thus, this option now increase
1262 code size, and it does not increase RAM usage in runtime anymore.
1263 * Remove the SSL APIs mbedtls_ssl_get_input_max_frag_len() and
1264 mbedtls_ssl_get_output_max_frag_len(), and add a new API
1265 mbedtls_ssl_get_max_in_record_payload(), complementing the existing
1266 mbedtls_ssl_get_max_out_record_payload().
1267 Uses of mbedtls_ssl_get_input_max_frag_len() and
1268 mbedtls_ssl_get_input_max_frag_len() should be replaced by
1269 mbedtls_ssl_get_max_in_record_payload() and
1270 mbedtls_ssl_get_max_out_record_payload(), respectively.
1271 * mbedtls_rsa_init() now always selects the PKCS#1v1.5 encoding for an RSA
1272 key. To use an RSA key with PSS or OAEP, call mbedtls_rsa_set_padding()
1273 after initializing the context. mbedtls_rsa_set_padding() now returns an
1274 error if its parameters are invalid.
Dave Rodgman745e3582021-07-05 18:53:31 +01001275 * Replace MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE by a runtime
1276 configuration function mbedtls_ssl_conf_preference_order(). Fixes #4398.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001277 * Instead of accessing the len field of a DHM context, which is no longer
1278 supported, use the new function mbedtls_dhm_get_len() .
1279 * In modules that implement cryptographic hash functions, many functions
1280 mbedtls_xxx() now return int instead of void, and the corresponding
1281 function mbedtls_xxx_ret() which was identical except for returning int
1282 has been removed. This also concerns mbedtls_xxx_drbg_update(). See the
1283 migration guide for more information. Fixes #4212.
1284 * For all functions that take a random number generator (RNG) as a
1285 parameter, this parameter is now mandatory (that is, NULL is not an
1286 acceptable value). Functions which previously accepted NULL and now
1287 reject it are: the X.509 CRT and CSR writing functions; the PK and RSA
1288 sign and decrypt function; mbedtls_rsa_private(); the functions
1289 in DHM and ECDH that compute the shared secret; the scalar multiplication
1290 functions in ECP.
1291 * The following functions now require an RNG parameter:
1292 mbedtls_ecp_check_pub_priv(), mbedtls_pk_check_pair(),
1293 mbedtls_pk_parse_key(), mbedtls_pk_parse_keyfile().
1294 * mbedtls_ssl_conf_export_keys_ext_cb() and
1295 mbedtls_ssl_conf_export_keys_cb() have been removed and
1296 replaced by a new API mbedtls_ssl_set_export_keys_cb().
1297 Raw keys and IVs are no longer passed to the callback.
1298 Further, callbacks now receive an additional parameter
1299 indicating the type of secret that's being exported,
1300 paving the way for the larger number of secrets
1301 in TLS 1.3. Finally, the key export callback and
1302 context are now connection-specific.
1303 * Signature functions in the RSA and PK modules now require the hash
1304 length parameter to be the size of the hash input. For RSA signatures
1305 other than raw PKCS#1 v1.5, this must match the output size of the
1306 specified hash algorithm.
1307 * The functions mbedtls_pk_sign(), mbedtls_pk_sign_restartable(),
1308 mbedtls_ecdsa_write_signature() and
1309 mbedtls_ecdsa_write_signature_restartable() now take an extra parameter
1310 indicating the size of the output buffer for the signature.
1311 * Implement one-shot cipher functions, psa_cipher_encrypt and
1312 psa_cipher_decrypt, according to the PSA Crypto API 1.0.0
1313 specification.
1314 * Direct access to fields of structures declared in public headers is no
1315 longer supported except for fields that are documented public. Use accessor
1316 functions instead. For more information, see the migration guide entry
1317 "Most structure fields are now private".
Dave Rodgman9bd03892021-07-01 16:59:49 +01001318 * mbedtls_ssl_get_session_pointer() has been removed, and
1319 mbedtls_ssl_{set,get}_session() may now only be called once for any given
1320 SSL context.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001321
1322Default behavior changes
1323 * Enable by default the functionalities which have no reason to be disabled.
1324 They are: ARIA block cipher, CMAC mode, elliptic curve J-PAKE library and
1325 Key Wrapping mode as defined in NIST SP 800-38F. Fixes #4036.
1326 * Some default policies for X.509 certificate verification and TLS have
1327 changed: curves and hashes weaker than 255 bits are no longer accepted
1328 by default. The default order in TLS now favors faster curves over larger
1329 curves.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001330
1331Requirement changes
1332 * The library now uses the %zu format specifier with the printf() family of
1333 functions, so requires a toolchain that supports it. This change does not
1334 affect the maintained LTS branches, so when contributing changes please
1335 bear this in mind and do not add them to backported code.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001336 * If you build the development version of Mbed TLS, rather than an official
1337 release, some configuration-independent files are now generated at build
1338 time rather than checked into source control. This includes some library
1339 source files as well as the Visual Studio solution. Perl, Python 3 and a
1340 C compiler for the host platform are required. See “Generated source files
1341 in the development branch” in README.md for more information.
1342 * Refresh the minimum supported versions of tools to build the
1343 library. CMake versions older than 3.10.2 and Python older
1344 than 3.6 are no longer supported.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001345
1346Removals
1347 * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
1348 compile-time option, which was off by default. Users should not trust
1349 certificates signed with SHA-1 due to the known attacks against SHA-1.
Manuel Pégourié-Gonnard143b1e32021-05-05 09:46:01 +02001350 If needed, SHA-1 certificates can still be verified by using a custom
Manuel Pégourié-Gonnarde7563062021-04-26 10:08:29 +02001351 verification profile.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001352 * Removed deprecated things in psa/crypto_compat.h. Fixes #4284
1353 * Removed deprecated functions from hashing modules. Fixes #4280.
1354 * Remove PKCS#11 library wrapper. PKCS#11 has limited functionality,
1355 lacks automated tests and has scarce documentation. Also, PSA Crypto
1356 provides a more flexible private key management.
1357 More details on PCKS#11 wrapper removal can be found in the mailing list
1358 https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000024.html
1359 * Remove deprecated error codes. Fix #4283
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001360 * Remove MBEDTLS_ENABLE_WEAK_CIPHERSUITES configuration option. Fixes #4416.
1361 * Remove the MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES
1362 compile-time option. This option has been inactive for a long time.
1363 Please use the `lifetime` parameter of `mbedtls_ssl_ticket_setup()`
1364 instead.
1365 * Remove the following deprecated functions and constants of hex-encoded
1366 primes based on RFC 5114 and RFC 3526 from library code and tests:
1367 mbedtls_aes_encrypt(), mbedtls_aes_decrypt(), mbedtls_mpi_is_prime(),
1368 mbedtls_cipher_auth_encrypt(), mbedtls_cipher_auth_decrypt(),
1369 mbedtls_ctr_drbg_update(), mbedtls_hmac_drbg_update(),
1370 mbedtls_ecdsa_write_signature_det(), mbedtls_ecdsa_sign_det(),
1371 mbedtls_ssl_conf_dh_param(), mbedtls_ssl_get_max_frag_len(),
1372 MBEDTLS_DHM_RFC5114_MODP_2048_P, MBEDTLS_DHM_RFC5114_MODP_2048_G,
1373 MBEDTLS_DHM_RFC3526_MODP_2048_P, MBEDTLS_DHM_RFC3526_MODP_2048_G,
1374 MBEDTLS_DHM_RFC3526_MODP_3072_P, MBEDTLS_DHM_RFC3526_MODP_3072_G,
1375 MBEDTLS_DHM_RFC3526_MODP_4096_P, MBEDTLS_DHM_RFC3526_MODP_4096_G.
1376 Remove the deprecated file: include/mbedtls/net.h. Fixes #4282.
1377 * Remove MBEDTLS_SSL_MAX_CONTENT_LEN configuration option, since
1378 MBEDTLS_SSL_IN_CONTENT_LEN and MBEDTLS_SSL_OUT_CONTENT_LEN replace
1379 it. Fixes #4362.
1380 * Remove the MBEDTLS_SSL_RECORD_CHECKING option and enable by default its
1381 previous action. Fixes #4361.
1382 * Remove support for TLS 1.0, TLS 1.1 and DTLS 1.0, as well as support for
1383 CBC record splitting, fallback SCSV, and the ability to configure
1384 ciphersuites per version, which are no longer relevant. This removes the
1385 configuration options MBEDTLS_SSL_PROTO_TLS1,
1386 MBEDTLS_SSL_PROTO_TLS1_1, MBEDTLS_SSL_CBC_RECORD_SPLITTING and
1387 MBEDTLS_SSL_FALLBACK_SCSV as well as the functions
1388 mbedtls_ssl_conf_cbc_record_splitting(),
1389 mbedtls_ssl_get_key_exchange_md_ssl_tls(), mbedtls_ssl_conf_fallback(),
1390 and mbedtls_ssl_conf_ciphersuites_for_version(). Fixes #4286.
1391 * The RSA module no longer supports private-key operations with the public
1392 key and vice versa.
1393 * Remove the MBEDTLS_SSL_DTLS_BADMAC_LIMIT config.h option. Fixes #4403.
1394 * Remove all the 3DES ciphersuites:
1395 MBEDTLS_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA,
1396 MBEDTLS_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA,
1397 MBEDTLS_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA,
1398 MBEDTLS_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA,
1399 MBEDTLS_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
1400 MBEDTLS_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA,
1401 MBEDTLS_TLS_PSK_WITH_3DES_EDE_CBC_SHA,
1402 MBEDTLS_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA,
1403 MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA. Remove the
1404 MBEDTLS_REMOVE_3DES_CIPHERSUITES option which is no longer relevant.
1405 Fixes #4367.
1406 * Remove the MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3 option and let the code
1407 behave as if it was always disabled. Fixes #4386.
1408 * Remove MBEDTLS_ECDH_LEGACY_CONTEXT config option since this was purely for
1409 backward compatibility which is no longer supported. Addresses #4404.
1410 * Remove the following macros: MBEDTLS_CHECK_PARAMS,
1411 MBEDTLS_CHECK_PARAMS_ASSERT, MBEDTLS_PARAM_FAILED,
1412 MBEDTLS_PARAM_FAILED_ALT. Fixes #4313.
1413 * Remove the MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION config.h
1414 option. The mbedtls_x509_crt_parse_der_with_ext_cb() is the way to go for
1415 migration path. Fixes #4378.
Dave Rodgman745e3582021-07-05 18:53:31 +01001416 * Remove the MBEDTLS_X509_CHECK_KEY_USAGE and
1417 MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE config.h options and let the code
1418 behave as if they were always enabled. Fixes #4405.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001419 * MBEDTLS_ECP_MAX_BITS is no longer a configuration option because it is
1420 now determined automatically based on supported curves.
Dave Rodgman745e3582021-07-05 18:53:31 +01001421 * Remove the following functions: mbedtls_timing_self_test(),
1422 mbedtls_hardclock_poll(), mbedtls_timing_hardclock() and
1423 mbedtls_set_alarm(). Fixes #4083.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001424 * The configuration option MBEDTLS_ECP_NO_INTERNAL_RNG has been removed as
1425 it no longer had any effect.
Dave Rodgman745e3582021-07-05 18:53:31 +01001426 * Remove all support for MD2, MD4, RC4, Blowfish and XTEA. This removes the
1427 corresponding modules and all their APIs and related configuration
1428 options. Fixes #4084.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001429 * Remove MBEDTLS_SSL_TRUNCATED_HMAC and also remove
1430 MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT config option. Users are better served by
1431 using a CCM-8 ciphersuite than a CBC ciphersuite with truncated HMAC.
1432 See issue #4341 for more details.
1433 * Remove the compile-time option
1434 MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001435
1436Features
1437 * Add mbedtls_rsa_rsassa_pss_sign_ext() function allowing to generate a
1438 signature with a specific salt length. This function allows to validate
1439 test cases provided in the NIST's CAVP test suite. Contributed by Cédric
1440 Meuter in PR #3183.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001441 * Added support for built-in driver keys through the PSA opaque crypto
1442 driver interface. Refer to the documentation of
1443 MBEDTLS_PSA_CRYPTO_BUILTIN_KEYS for more information.
1444 * Implement psa_sign_message() and psa_verify_message().
1445 * The multi-part GCM interface (mbedtls_gcm_update() or
1446 mbedtls_cipher_update()) no longer requires the size of partial inputs to
1447 be a multiple of 16.
1448 * The multi-part GCM interface now supports chunked associated data through
1449 multiple calls to mbedtls_gcm_update_ad().
1450 * The new function mbedtls_mpi_random() generates a random value in a
1451 given range uniformly.
1452 * Alternative implementations of the AES, DHM, ECJPAKE, ECP, RSA and timing
1453 modules had undocumented constraints on their context types. These
1454 constraints have been relaxed.
1455 See docs/architecture/alternative-implementations.md for the remaining
1456 constraints.
1457 * The new functions mbedtls_dhm_get_len() and mbedtls_dhm_get_bitlen()
1458 query the size of the modulus in a Diffie-Hellman context.
1459 * The new function mbedtls_dhm_get_value() copy a field out of a
1460 Diffie-Hellman context.
1461 * Use the new function mbedtls_ecjpake_set_point_format() to select the
1462 point format for ECJPAKE instead of accessing the point_format field
1463 directly, which is no longer supported.
1464 * Implement psa_mac_compute() and psa_mac_verify() as defined in the
1465 PSA Cryptograpy API 1.0.0 specification.
1466
1467Security
Dave Rodgman5b13f602021-07-05 18:09:16 +01001468 * Fix a bias in the generation of finite-field Diffie-Hellman-Merkle (DHM)
1469 private keys and of blinding values for DHM and elliptic curves (ECP)
1470 computations. Reported by FlorianF89 in #4245.
1471 * Fix a potential side channel vulnerability in ECDSA ephemeral key generation.
1472 An adversary who is capable of very precise timing measurements could
1473 learn partial information about the leading bits of the nonce used for the
1474 signature, allowing the recovery of the private key after observing a
1475 large number of signature operations. This completes a partial fix in
1476 Mbed TLS 2.20.0.
Tom Cosgroveb3c6a1e2023-03-08 15:47:00 +00001477 * Fix an issue where an adversary with access to precise enough information
1478 about memory accesses (typically, an untrusted operating system attacking
1479 a secure enclave) could recover an RSA private key after observing the
1480 victim performing a single private-key operation. Found and reported by
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001481 Zili KOU, Wenjian HE, Sharad Sinha, and Wei ZHANG.
Tom Cosgroveb3c6a1e2023-03-08 15:47:00 +00001482 * Fix an issue where an adversary with access to precise enough timing
1483 information (typically, a co-located process) could recover a Curve25519
1484 or Curve448 static ECDH key after inputting a chosen public key and
1485 observing the victim performing the corresponding private-key operation.
1486 Found and reported by Leila Batina, Lukas Chmielewski, Björn Haase, Niels
1487 Samwel and Peter Schwabe.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001488
1489Bugfix
1490 * Fix premature fopen() call in mbedtls_entropy_write_seed_file which may
1491 lead to the seed file corruption in case if the path to the seed file is
1492 equal to MBEDTLS_PLATFORM_STD_NV_SEED_FILE. Contributed by Victor
1493 Krasnoshchok in #3616.
1494 * PSA functions creating a key now return PSA_ERROR_INVALID_ARGUMENT rather
1495 than PSA_ERROR_INVALID_HANDLE when the identifier specified for the key
1496 to create is not valid, bringing them in line with version 1.0.0 of the
1497 specification. Fix #4271.
1498 * Add printf function attributes to mbedtls_debug_print_msg to ensure we
1499 get printf format specifier warnings.
1500 * PSA functions other than psa_open_key now return PSA_ERROR_INVALID_HANDLE
1501 rather than PSA_ERROR_DOES_NOT_EXIST for an invalid handle, bringing them
1502 in line with version 1.0.0 of the specification. Fix #4162.
1503 * Fix a bug in ECDSA that would cause it to fail when the hash is all-bits
1504 zero. Fixes #1792
Gilles Peskinef4998b02021-06-10 15:51:54 +02001505 * Fix some cases in the bignum module where the library constructed an
1506 unintended representation of the value 0 which was not processed
1507 correctly by some bignum operations. This could happen when
1508 mbedtls_mpi_read_string() was called on "-0", or when
1509 mbedtls_mpi_mul_mpi() and mbedtls_mpi_mul_int() was called with one of
1510 the arguments being negative and the other being 0. Fixes #4643.
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001511 * Fix a compilation error when MBEDTLS_ECP_RANDOMIZE_MXZ_ALT is
1512 defined. Fixes #4217.
1513 * Fix an incorrect error code when parsing a PKCS#8 private key.
1514 * In a TLS client, enforce the Diffie-Hellman minimum parameter size
1515 set with mbedtls_ssl_conf_dhm_min_bitlen() precisely. Before, the
1516 minimum size was rounded down to the nearest multiple of 8.
1517 * In library/net_sockets.c, _POSIX_C_SOURCE and _XOPEN_SOURCE are
1518 defined to specific values. If the code is used in a context
1519 where these are already defined, this can result in a compilation
1520 error. Instead, assume that if they are defined, the values will
1521 be adequate to build Mbed TLS.
1522 * With MBEDTLS_PSA_CRYPTO_C disabled, some functions were getting built
1523 nonetheless, resulting in undefined reference errors when building a
1524 shared library. Reported by Guillermo Garcia M. in #4411.
1525 * The cipher suite TLS-RSA-WITH-CAMELLIA-256-GCM-SHA384 was not available
1526 when SHA-1 was disabled and was offered when SHA-1 was enabled but SHA-384
1527 was disabled. Fix the dependency. Fixes #4472.
1528 * Do not offer SHA384 cipher suites when SHA-384 is disabled. Fixes #4499.
1529 * Fix test suite code on platforms where int32_t is not int, such as
1530 Arm Cortex-M. Fixes #4530.
1531 * Fix some issues affecting MBEDTLS_ARIA_ALT implementations: a misplaced
1532 directive in a header and a missing initialization in the self-test.
1533 * Fix a missing initialization in the Camellia self-test, affecting
1534 MBEDTLS_CAMELLIA_ALT implementations.
1535 * Restore the ability to configure PSA via Mbed TLS options to support RSA
1536 key pair operations but exclude RSA key generation. When MBEDTLS_GENPRIME
1537 is not defined PSA will no longer attempt to use mbedtls_rsa_gen_key().
1538 Fixes #4512.
1539 * Fix a regression introduced in 2.24.0 which broke (D)TLS CBC ciphersuites
1540 (when the encrypt-then-MAC extension is not in use) with some ALT
1541 implementations of the underlying hash (SHA-1, SHA-256, SHA-384), causing
1542 the affected side to wrongly reject valid messages. Fixes #4118.
1543 * Remove outdated check-config.h check that prevented implementing the
1544 timing module on Mbed OS. Fixes #4633.
1545 * Fix PSA_ALG_TLS12_PRF and PSA_ALG_TLS12_PSK_TO_MS being too permissive
1546 about missing inputs.
1547 * Fix mbedtls_net_poll() and mbedtls_net_recv_timeout() often failing with
1548 MBEDTLS_ERR_NET_POLL_FAILED on Windows. Fixes #4465.
1549 * Fix a resource leak in a test suite with an alternative AES
1550 implementation. Fixes #4176.
1551 * Fix a crash in mbedtls_mpi_debug_mpi on a bignum having 0 limbs. This
1552 could notably be triggered by setting the TLS debug level to 3 or above
1553 and using a Montgomery curve for the key exchange. Reported by lhuang04
1554 in #4578. Fixes #4608.
1555 * psa_verify_hash() was relying on implementation-specific behavior of
1556 mbedtls_rsa_rsassa_pss_verify() and was causing failures in some _ALT
1557 implementations. This reliance is now removed. Fixes #3990.
1558 * Disallow inputs of length different from the corresponding hash when
1559 signing or verifying with PSA_ALG_RSA_PSS (The PSA Crypto API mandates
1560 that PSA_ALG_RSA_PSS uses the same hash throughout the algorithm.)
1561 * Fix a null pointer dereference when mbedtls_mpi_exp_mod() was called with
1562 A=0 represented with 0 limbs. Up to and including Mbed TLS 2.26, this bug
1563 could not be triggered by code that constructed A with one of the
1564 mbedtls_mpi_read_xxx functions (including in particular TLS code) since
1565 those always built an mpi object with at least one limb.
1566 Credit to OSS-Fuzz. Fixes #4641.
1567 * Fix mbedtls_mpi_gcd(G,A,B) when the value of B is zero. This had no
1568 effect on Mbed TLS's internal use of mbedtls_mpi_gcd(), but may affect
1569 applications that call mbedtls_mpi_gcd() directly. Fixes #4642.
1570 * The PSA API no longer allows the creation or destruction of keys with a
1571 read-only lifetime. The persistence level PSA_KEY_PERSISTENCE_READ_ONLY
1572 can now only be used as intended, for keys that cannot be modified through
1573 normal use of the API.
1574 * When MBEDTLS_PSA_CRYPTO_SPM is enabled, crypto_spe.h was not included
1575 in all the right places. Include it from crypto_platform.h, which is
1576 the natural place. Fixes #4649.
1577 * Fix which alert is sent in some cases to conform to the
1578 applicable RFC: on an invalid Finished message value, an
1579 invalid max_fragment_length extension, or an
1580 unsupported extension used by the server.
Dave Rodgmana84a8eb2021-07-01 17:01:04 +01001581 * Correct (change from 12 to 13 bytes) the value of the macro describing the
1582 maximum nonce length returned by psa_aead_generate_nonce().
Dave Rodgman10ba5532021-04-26 14:58:26 +01001583
1584Changes
1585 * Fix the setting of the read timeout in the DTLS sample programs.
1586 * Add extra printf compiler warning flags to builds.
1587 * Fix memsan build false positive in x509_crt.c with clang 11
Dave Rodgmanbb2eece2021-06-30 18:07:19 +01001588 * Alternative implementations of CMAC may now opt to not support 3DES as a
1589 CMAC block cipher, and still pass the CMAC self test.
1590 * Remove the AES sample application programs/aes/aescrypt2 which shows
1591 bad cryptographic practice. Fix #1906.
1592 * Remove configs/config-psa-crypto.h, which no longer had any intended
1593 differences from the default configuration, but had accidentally diverged.
1594 * When building the test suites with GNU make, invoke python3 or python, not
1595 python2, which is no longer supported upstream.
1596 * fix build failure on MinGW toolchain when __USE_MING_ANSI_STDIO is on.
1597 When that flag is on, standard GNU C printf format specifiers
1598 should be used.
1599 * Replace MBEDTLS_SSL_CID_PADDING_GRANULARITY and
1600 MBEDTLS_SSL_TLS1_3_PADDING_GRANULARITY with a new single unified option
1601 MBEDTLS_SSL_CID_TLS1_3_PADDING_GRANULARITY. Fixes #4335.
1602 * Reduce the default value of MBEDTLS_ECP_WINDOW_SIZE. This reduces RAM usage
1603 during ECC operations at a negligible performance cost.
1604 * mbedtls_mpi_read_binary(), mbedtls_mpi_read_binary_le() and
1605 mbedtls_mpi_read_string() now construct an mbedtls_mpi object with 0 limbs
1606 when their input has length 0. Note that this is an implementation detail
1607 and can change at any time, so this change should be transparent, but it
1608 may result in mbedtls_mpi_write_binary() or mbedtls_mpi_write_string()
1609 now writing an empty string where it previously wrote one or more
1610 zero digits when operating from values constructed with an mpi_read
1611 function and some mpi operations.
1612 * Add CMake package config generation for CMake projects consuming Mbed TLS.
1613 * config.h has been split into build_info.h and mbedtls_config.h
1614 build_info.h is intended to be included from C code directly, while
1615 mbedtls_config.h is intended to be edited by end users wishing to
1616 change the build configuration, and should generally only be included from
1617 build_info.h.
1618 * The handling of MBEDTLS_CONFIG_FILE has been moved into build_info.h.
1619 * A config file version symbol, MBEDTLS_CONFIG_VERSION was introduced.
1620 Defining it to a particular value will ensure that Mbed TLS interprets
1621 the config file in a way that's compatible with the config file format
1622 used by the Mbed TLS release whose MBEDTLS_VERSION_NUMBER has the same
1623 value.
1624 The only value supported by Mbed TLS 3.0.0 is 0x03000000.
1625 * Various changes to which alert and/or error code may be returned
1626 * during the TLS handshake.
1627 * Implicitly add PSA_KEY_USAGE_SIGN_MESSAGE key usage policy flag when
1628 PSA_KEY_USAGE_SIGN_HASH flag is set and PSA_KEY_USAGE_VERIFY_MESSAGE flag
1629 when PSA_KEY_USAGE_VERIFY_HASH flag is set. This usage flag extension
1630 is also applied when loading a key from storage.
Dave Rodgman10ba5532021-04-26 14:58:26 +01001631
Dave Rodgman74755e42021-03-08 18:35:44 +00001632= mbed TLS 2.26.0 branch released 2021-03-08
1633
1634API changes
1635 * Renamed the PSA Crypto API output buffer size macros to bring them in line
1636 with version 1.0.0 of the specification.
1637 * The API glue function mbedtls_ecc_group_of_psa() now takes the curve size
1638 in bits rather than bytes, with an additional flag to indicate if the
1639 size may have been rounded up to a whole number of bytes.
1640 * Renamed the PSA Crypto API AEAD tag length macros to bring them in line
1641 with version 1.0.0 of the specification.
1642
1643Default behavior changes
1644 * In mbedtls_rsa_context objects, the ver field was formerly documented
1645 as always 0. It is now reserved for internal purposes and may take
1646 different values.
1647
1648New deprecations
1649 * PSA_KEY_EXPORT_MAX_SIZE, PSA_HASH_SIZE, PSA_MAC_FINAL_SIZE,
1650 PSA_BLOCK_CIPHER_BLOCK_SIZE, PSA_MAX_BLOCK_CIPHER_BLOCK_SIZE and
1651 PSA_ALG_TLS12_PSK_TO_MS_MAX_PSK_LEN have been renamed, and the old names
1652 deprecated.
1653 * PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH and PSA_ALG_AEAD_WITH_TAG_LENGTH
1654 have been renamed, and the old names deprecated.
1655
1656Features
1657 * The PSA crypto subsystem can now use HMAC_DRBG instead of CTR_DRBG.
1658 CTR_DRBG is used by default if it is available, but you can override
1659 this choice by setting MBEDTLS_PSA_HMAC_DRBG_MD_TYPE at compile time.
1660 Fix #3354.
1661 * Automatic fallback to a software implementation of ECP when
1662 MBEDTLS_ECP_xxx_ALT accelerator hooks are in use can now be turned off
1663 through setting the new configuration flag MBEDTLS_ECP_NO_FALLBACK.
1664 * The PSA crypto subsystem can now be configured to use less static RAM by
1665 tweaking the setting for the maximum amount of keys simultaneously in RAM.
1666 MBEDTLS_PSA_KEY_SLOT_COUNT sets the maximum number of volatile keys that
1667 can exist simultaneously. It has a sensible default if not overridden.
1668 * Partial implementation of the PSA crypto driver interface: Mbed TLS can
1669 now use an external random generator instead of the library's own
1670 entropy collection and DRBG code. Enable MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG
1671 and see the documentation of mbedtls_psa_external_get_random() for details.
1672 * Applications using both mbedtls_xxx and psa_xxx functions (for example,
1673 applications using TLS and MBEDTLS_USE_PSA_CRYPTO) can now use the PSA
1674 random generator with mbedtls_xxx functions. See the documentation of
1675 mbedtls_psa_get_random() for details.
1676 * In the PSA API, the policy for a MAC or AEAD algorithm can specify a
1677 minimum MAC or tag length thanks to the new wildcards
1678 PSA_ALG_AT_LEAST_THIS_LENGTH_MAC and
1679 PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG.
1680
1681Security
1682 * Fix a security reduction in CTR_DRBG when the initial seeding obtained a
1683 nonce from entropy. Applications were affected if they called
1684 mbedtls_ctr_drbg_set_nonce_len(), if they called
1685 mbedtls_ctr_drbg_set_entropy_len() with a size that was 3/2 times the key
1686 length, or when the entropy module uses SHA-256 and CTR_DRBG uses AES-256.
1687 In such cases, a random nonce was necessary to achieve the advertised
1688 security strength, but the code incorrectly used a constant instead of
1689 entropy from the nonce.
1690 Found by John Stroebel in #3819 and fixed in #3973.
1691 * Fix a buffer overflow in mbedtls_mpi_sub_abs() when calculating
1692 |A| - |B| where |B| is larger than |A| and has more limbs (so the
1693 function should return MBEDTLS_ERR_MPI_NEGATIVE_VALUE). Only
1694 applications calling mbedtls_mpi_sub_abs() directly are affected:
1695 all calls inside the library were safe since this function is
1696 only called with |A| >= |B|. Reported by Guido Vranken in #4042.
1697 * Fix an errorneous estimation for an internal buffer in
1698 mbedtls_pk_write_key_pem(). If MBEDTLS_MPI_MAX_SIZE is set to an odd
1699 value the function might fail to write a private RSA keys of the largest
1700 supported size.
1701 Found by Daniel Otte, reported in #4093 and fixed in #4094.
1702 * Fix a stack buffer overflow with mbedtls_net_poll() and
1703 mbedtls_net_recv_timeout() when given a file descriptor that is
1704 beyond FD_SETSIZE. Reported by FigBug in #4169.
1705 * Guard against strong local side channel attack against base64 tables by
1706 making access aceess to them use constant flow code.
1707
1708Bugfix
1709 * Fix use-after-scope error in programs/ssl/ssl_client2.c and ssl_server2.c
1710 * Fix memory leak that occured when calling psa_close_key() on a
1711 wrapped key with MBEDTLS_PSA_CRYPTO_SE_C defined.
1712 * Fix an incorrect error code if an RSA private operation glitched.
1713 * Fix a memory leak in an error case in psa_generate_derived_key_internal().
1714 * Fix a resource leak in CTR_DRBG and HMAC_DRBG when MBEDTLS_THREADING_C
1715 is enabled, on platforms where initializing a mutex allocates resources.
1716 This was a regression introduced in the previous release. Reported in
1717 #4017, #4045 and #4071.
1718 * Ensure that calling mbedtls_rsa_free() or mbedtls_entropy_free()
1719 twice is safe. This happens for RSA when some Mbed TLS library functions
1720 fail. Such a double-free was not safe when MBEDTLS_THREADING_C was
1721 enabled on platforms where freeing a mutex twice is not safe.
1722 * Fix a resource leak in a bad-arguments case of mbedtls_rsa_gen_key()
1723 when MBEDTLS_THREADING_C is enabled on platforms where initializing
1724 a mutex allocates resources.
1725 * Fixes a bug where, if the library was configured to include support for
1726 both the old SE interface and the new PSA driver interface, external keys were
1727 not loaded from storage. This was fixed by #3996.
1728 * This change makes 'mbedtls_x509write_crt_set_basic_constraints'
1729 consistent with RFC 5280 4.2.1.9 which says: "Conforming CAs MUST
1730 include this extension in all CA certificates that contain public keys
1731 used to validate digital signatures on certificates and MUST mark the
1732 extension as critical in such certificates." Previous to this change,
1733 the extension was always marked as non-critical. This was fixed by
1734 #3698.
1735
1736Changes
1737 * A new library C file psa_crypto_client.c has been created to contain
1738 the PSA code needed by a PSA crypto client when the PSA crypto
1739 implementation is not included into the library.
1740 * On recent enough versions of FreeBSD and DragonFlyBSD, the entropy module
1741 now uses the getrandom syscall instead of reading from /dev/urandom.
1742
Janos Follath56b38c22020-12-09 01:34:21 +00001743= mbed TLS 2.25.0 branch released 2020-12-11
Janos Follath7ac5fd12020-12-09 15:03:46 +00001744
1745API changes
1746 * The numerical values of the PSA Crypto API macros have been updated to
1747 conform to version 1.0.0 of the specification.
1748 * PSA_ALG_STREAM_CIPHER replaces PSA_ALG_CHACHA20 and PSA_ALG_ARC4.
1749 The underlying stream cipher is determined by the key type
1750 (PSA_KEY_TYPE_CHACHA20 or PSA_KEY_TYPE_ARC4).
1751 * The functions mbedtls_cipher_auth_encrypt() and
1752 mbedtls_cipher_auth_decrypt() no longer accept NIST_KW contexts,
1753 as they have no way to check if the output buffer is large enough.
1754 Please use mbedtls_cipher_auth_encrypt_ext() and
1755 mbedtls_cipher_auth_decrypt_ext() instead. Credit to OSS-Fuzz and
1756 Cryptofuzz. Fixes #3665.
1757
1758Requirement changes
Janos Follathe9216262020-12-10 11:03:01 +00001759 * Update the minimum required CMake version to 2.8.12. This silences a
1760 warning on CMake 3.19.0. #3801
Janos Follath7ac5fd12020-12-09 15:03:46 +00001761
1762New deprecations
Bence Szépkútife9a4252021-02-08 18:13:02 +01001763 * PSA_ALG_CHACHA20 and PSA_ALG_ARC4 have been deprecated.
Janos Follath7ac5fd12020-12-09 15:03:46 +00001764 Use PSA_ALG_STREAM_CIPHER instead.
1765 * The functions mbedtls_cipher_auth_encrypt() and
1766 mbedtls_cipher_auth_decrypt() are deprecated in favour of the new
1767 functions mbedtls_cipher_auth_encrypt_ext() and
1768 mbedtls_cipher_auth_decrypt_ext(). Please note that with AEAD ciphers,
1769 these new functions always append the tag to the ciphertext, and include
1770 the tag in the ciphertext length.
1771
1772Features
Janos Follathd6ce1162020-12-09 16:32:01 +00001773 * Partial implementation of the new PSA Crypto accelerator APIs. (Symmetric
1774 ciphers, asymmetric signing/verification and key generation, validate_key
1775 entry point, and export_public_key interface.)
Janos Follath7ac5fd12020-12-09 15:03:46 +00001776 * Add support for ECB to the PSA cipher API.
Janos Follath7ac5fd12020-12-09 15:03:46 +00001777 * In PSA, allow using a key declared with a base key agreement algorithm
1778 in combined key agreement and derivation operations, as long as the key
1779 agreement algorithm in use matches the algorithm the key was declared with.
1780 This is currently non-standard behaviour, but expected to make it into a
1781 future revision of the PSA Crypto standard.
1782 * Add MBEDTLS_TARGET_PREFIX CMake variable, which is prefixed to the mbedtls,
1783 mbedcrypto, mbedx509 and apidoc CMake target names. This can be used by
1784 external CMake projects that include this one to avoid CMake target name
1785 clashes. The default value of this variable is "", so default target names
1786 are unchanged.
1787 * Add support for DTLS-SRTP as defined in RFC 5764. Contributed by Johan
1788 Pascal, improved by Ron Eldor.
1789 * In the PSA API, it is no longer necessary to open persistent keys:
1790 operations now accept the key identifier. The type psa_key_handle_t is now
1791 identical to psa_key_id_t instead of being platform-defined. This bridges
1792 the last major gap to compliance with the PSA Cryptography specification
1793 version 1.0.0. Opening persistent keys is still supported for backward
1794 compatibility, but will be deprecated and later removed in future
1795 releases.
Janos Follath7ac5fd12020-12-09 15:03:46 +00001796 * PSA_AEAD_NONCE_LENGTH, PSA_AEAD_NONCE_MAX_SIZE, PSA_CIPHER_IV_LENGTH and
1797 PSA_CIPHER_IV_MAX_SIZE macros have been added as defined in version
1798 1.0.0 of the PSA Crypto API specification.
1799
1800Security
1801 * The functions mbedtls_cipher_auth_encrypt() and
1802 mbedtls_cipher_auth_decrypt() would write past the minimum documented
1803 size of the output buffer when used with NIST_KW. As a result, code using
1804 those functions as documented with NIST_KW could have a buffer overwrite
1805 of up to 15 bytes, with consequences ranging up to arbitrary code
1806 execution depending on the location of the output buffer.
1807 * Limit the size of calculations performed by mbedtls_mpi_exp_mod to
1808 MBEDTLS_MPI_MAX_SIZE to prevent a potential denial of service when
1809 generating Diffie-Hellman key pairs. Credit to OSS-Fuzz.
1810 * A failure of the random generator was ignored in mbedtls_mpi_fill_random(),
1811 which is how most uses of randomization in asymmetric cryptography
1812 (including key generation, intermediate value randomization and blinding)
1813 are implemented. This could cause failures or the silent use of non-random
1814 values. A random generator can fail if it needs reseeding and cannot not
1815 obtain entropy, or due to an internal failure (which, for Mbed TLS's own
1816 CTR_DRBG or HMAC_DRBG, can only happen due to a misconfiguration).
1817 * Fix a compliance issue whereby we were not checking the tag on the
1818 algorithm parameters (only the size) when comparing the signature in the
1819 description part of the cert to the real signature. This meant that a
1820 NULL algorithm parameters entry would look identical to an array of REAL
1821 (size zero) to the library and thus the certificate would be considered
1822 valid. However, if the parameters do not match in *any* way then the
1823 certificate should be considered invalid, and indeed OpenSSL marks these
1824 certs as invalid when mbedtls did not.
1825 Many thanks to guidovranken who found this issue via differential fuzzing
1826 and reported it in #3629.
1827 * Zeroising of local buffers and variables which are used for calculations
1828 in mbedtls_pkcs5_pbkdf2_hmac(), mbedtls_internal_sha*_process(),
1829 mbedtls_internal_md*_process() and mbedtls_internal_ripemd160_process()
1830 functions to erase sensitive data from memory. Reported by
1831 Johan Malmgren and Johan Uppman Bruce from Sectra.
1832
1833Bugfix
Janos Follath76027f62020-12-09 16:28:35 +00001834 * Fix an invalid (but nonzero) return code from mbedtls_pk_parse_subpubkey()
1835 when the input has trailing garbage. Fixes #2512.
Janos Follath7ac5fd12020-12-09 15:03:46 +00001836 * Fix build failure in configurations where MBEDTLS_USE_PSA_CRYPTO is
1837 enabled but ECDSA is disabled. Contributed by jdurkop. Fixes #3294.
1838 * Include the psa_constant_names generated source code in the source tree
1839 instead of generating it at build time. Fixes #3524.
1840 * Fix rsa_prepare_blinding() to retry when the blinding value is not
1841 invertible (mod N), instead of returning MBEDTLS_ERR_RSA_RNG_FAILED. This
1842 addresses a regression but is rare in practice (approx. 1 in 2/sqrt(N)).
1843 Found by Synopsys Coverity, fix contributed by Peter Kolbus (Garmin).
1844 Fixes #3647.
1845 * Use socklen_t on Android and other POSIX-compliant system
1846 * Fix the build when the macro _GNU_SOURCE is defined to a non-empty value.
1847 Fix #3432.
1848 * Consistently return PSA_ERROR_INVALID_ARGUMENT on invalid cipher input
1849 sizes (instead of PSA_ERROR_BAD_STATE in some cases) to make the
1850 psa_cipher_* functions compliant with the PSA Crypto API specification.
1851 * mbedtls_ecp_curve_list() now lists Curve25519 and Curve448 under the names
1852 "x25519" and "x448". These curves support ECDH but not ECDSA. If you need
1853 only the curves that support ECDSA, filter the list with
1854 mbedtls_ecdsa_can_do().
1855 * Fix psa_generate_key() returning an error when asked to generate
1856 an ECC key pair on Curve25519 or secp244k1.
1857 * Fix psa_key_derivation_output_key() to allow the output of a combined key
1858 agreement and subsequent key derivation operation to be used as a key
1859 inside of the PSA Crypto core.
1860 * Fix handling of EOF against 0xff bytes and on platforms with unsigned
1861 chars. Fixes a build failure on platforms where char is unsigned. Fixes
1862 #3794.
1863 * Fix an off-by-one error in the additional data length check for
1864 CCM, which allowed encryption with a non-standard length field.
1865 Fixes #3719.
1866 * Correct the default IV size for mbedtls_cipher_info_t structures using
1867 MBEDTLS_MODE_ECB to 0, since ECB mode ciphers don't use IVs.
1868 * Make arc4random_buf available on NetBSD and OpenBSD when _POSIX_C_SOURCE is
1869 defined. Fix contributed in #3571.
1870 * Fix conditions for including string.h in error.c. Fixes #3866.
1871 * psa_set_key_id() now also sets the lifetime to persistent for keys located
1872 in a secure element.
1873 * Attempting to create a volatile key with a non-zero key identifier now
1874 fails. Previously the key identifier was just ignored when creating a
1875 volatile key.
1876 * Attempting to create or register a key with a key identifier in the vendor
1877 range now fails.
1878 * Fix build failures on GCC 11. Fixes #3782.
1879 * Add missing arguments of debug message in mbedtls_ssl_decrypt_buf.
1880 * Fix a memory leak in mbedtls_mpi_sub_abs() when the result was negative
1881 (an error condition) and the second operand was aliased to the result.
1882 * Fix a case in elliptic curve arithmetic where an out-of-memory condition
1883 could go undetected, resulting in an incorrect result.
1884 * In CTR_DRBG and HMAC_DRBG, don't reset the reseed interval in seed().
1885 Fixes #2927.
1886 * In PEM writing functions, fill the trailing part of the buffer with null
1887 bytes. This guarantees that the corresponding parsing function can read
1888 the buffer back, which was the case for mbedtls_x509write_{crt,csr}_pem
1889 until this property was inadvertently broken in Mbed TLS 2.19.0.
1890 Fixes #3682.
1891 * Fix a build failure that occurred with the MBEDTLS_AES_SETKEY_DEC_ALT
1892 option on. In this configuration key management methods that are required
1893 for MBEDTLS_CIPHER_MODE_XTS were excluded from the build and made it fail.
1894 Fixes #3818. Reported by John Stroebel.
1895
1896Changes
1897 * Reduce stack usage significantly during sliding window exponentiation.
1898 Reported in #3591 and fix contributed in #3592 by Daniel Otte.
1899 * The PSA persistent storage format is updated to always store the key bits
1900 attribute. No automatic upgrade path is provided. Previously stored keys
1901 must be erased, or manually upgraded based on the key storage format
1902 specification (docs/architecture/mbed-crypto-storage-specification.md).
1903 Fixes #3740.
1904 * Remove the zeroization of a pointer variable in AES rounds. It was valid
1905 but spurious and misleading since it looked like a mistaken attempt to
1906 zeroize the pointed-to buffer. Reported by Antonio de la Piedra, CEA
1907 Leti, France.
1908
Janos Follath6012f0e2020-08-26 15:32:10 +01001909= mbed TLS 2.24.0 branch released 2020-09-01
Janos Follathc18a7b82020-08-26 14:49:16 +01001910
1911API changes
Janos Follath6012f0e2020-08-26 15:32:10 +01001912 * In the PSA API, rename the types of elliptic curve and Diffie-Hellman
1913 group families to psa_ecc_family_t and psa_dh_family_t, in line with the
1914 PSA Crypto API specification version 1.0.0.
Janos Follathc18a7b82020-08-26 14:49:16 +01001915 Rename associated macros as well:
1916 PSA_ECC_CURVE_xxx renamed to PSA_ECC_FAMILY_xxx
1917 PSA_DH_GROUP_xxx renamed to PSA_DH_FAMILY_xxx
1918 PSA_KEY_TYPE_GET_CURVE renamed to to PSA_KEY_TYPE_ECC_GET_FAMILY
1919 PSA_KEY_TYPE_GET_GROUP renamed to PSA_KEY_TYPE_DH_GET_FAMILY
1920
1921Default behavior changes
1922 * Stop storing persistent information about externally stored keys created
1923 through PSA Crypto with a volatile lifetime. Reported in #3288 and
1924 contributed by Steven Cooreman in #3382.
1925
1926Features
1927 * The new function mbedtls_ecp_write_key() exports private ECC keys back to
1928 a byte buffer. It is the inverse of the existing mbedtls_ecp_read_key().
1929 * Support building on e2k (Elbrus) architecture: correctly enable
1930 -Wformat-signedness, and fix the code that causes signed-one-bit-field
1931 and sign-compare warnings. Contributed by makise-homura (Igor Molchanov)
1932 <akemi_homura@kurisa.ch>.
1933
1934Security
1935 * Fix a vulnerability in the verification of X.509 certificates when
1936 matching the expected common name (the cn argument of
1937 mbedtls_x509_crt_verify()) with the actual certificate name: when the
1938 subjecAltName extension is present, the expected name was compared to any
1939 name in that extension regardless of its type. This means that an
1940 attacker could for example impersonate a 4-bytes or 16-byte domain by
1941 getting a certificate for the corresponding IPv4 or IPv6 (this would
1942 require the attacker to control that IP address, though). Similar attacks
1943 using other subjectAltName name types might be possible. Found and
1944 reported by kFYatek in #3498.
1945 * When checking X.509 CRLs, a certificate was only considered as revoked if
1946 its revocationDate was in the past according to the local clock if
1947 available. In particular, on builds without MBEDTLS_HAVE_TIME_DATE,
1948 certificates were never considered as revoked. On builds with
1949 MBEDTLS_HAVE_TIME_DATE, an attacker able to control the local clock (for
1950 example, an untrusted OS attacking a secure enclave) could prevent
1951 revocation of certificates via CRLs. Fixed by no longer checking the
1952 revocationDate field, in accordance with RFC 5280. Reported by
1953 yuemonangong in #3340. Reported independently and fixed by
1954 Raoul Strackx and Jethro Beekman in #3433.
1955 * In (D)TLS record decryption, when using a CBC ciphersuites without the
1956 Encrypt-then-Mac extension, use constant code flow memory access patterns
1957 to extract and check the MAC. This is an improvement to the existing
1958 countermeasure against Lucky 13 attacks. The previous countermeasure was
1959 effective against network-based attackers, but less so against local
1960 attackers. The new countermeasure defends against local attackers, even
1961 if they have access to fine-grained measurements. In particular, this
1962 fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz,
1963 Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler
1964 (University of Florida) and Dave Tian (Purdue University).
1965 * Fix side channel in RSA private key operations and static (finite-field)
1966 Diffie-Hellman. An adversary with precise enough timing and memory access
1967 information (typically an untrusted operating system attacking a secure
1968 enclave) could bypass an existing counter-measure (base blinding) and
1969 potentially fully recover the private key.
1970 * Fix a 1-byte buffer overread in mbedtls_x509_crl_parse_der().
1971 Credit to OSS-Fuzz for detecting the problem and to Philippe Antoine
1972 for pinpointing the problematic code.
1973 * Zeroising of plaintext buffers in mbedtls_ssl_read() to erase unused
1974 application data from memory. Reported in #689 by
1975 Johan Uppman Bruce of Sectra.
1976
1977Bugfix
1978 * Library files installed after a CMake build no longer have execute
1979 permission.
Janos Follath6012f0e2020-08-26 15:32:10 +01001980 * Use local labels in mbedtls_padlock_has_support() to fix an invalid symbol
1981 redefinition if the function is inlined.
Janos Follathc18a7b82020-08-26 14:49:16 +01001982 Reported in #3451 and fix contributed in #3452 by okhowang.
1983 * Fix the endianness of Curve25519 keys imported/exported through the PSA
1984 APIs. psa_import_key and psa_export_key will now correctly expect/output
1985 Montgomery keys in little-endian as defined by RFC7748. Contributed by
1986 Steven Cooreman in #3425.
1987 * Fix build errors when the only enabled elliptic curves are Montgomery
1988 curves. Raised by signpainter in #941 and by Taiki-San in #1412. This
1989 also fixes missing declarations reported by Steven Cooreman in #1147.
1990 * Fix self-test failure when the only enabled short Weierstrass elliptic
1991 curve is secp192k1. Fixes #2017.
1992 * PSA key import will now correctly import a Curve25519/Curve448 public key
1993 instead of erroring out. Contributed by Steven Cooreman in #3492.
1994 * Use arc4random_buf on NetBSD instead of rand implementation with cyclical
1995 lower bits. Fix contributed in #3540.
1996 * Fix a memory leak in mbedtls_md_setup() when using HMAC under low memory
1997 conditions. Reported and fix suggested by Guido Vranken in #3486.
1998 * Fix bug in redirection of unit test outputs on platforms where stdout is
1999 defined as a macro. First reported in #2311 and fix contributed in #3528.
2000
2001Changes
2002 * Only pass -Wformat-signedness to versions of GCC that support it. Reported
2003 in #3478 and fix contributed in #3479 by okhowang.
2004 * Reduce the stack consumption of mbedtls_x509write_csr_der() which
2005 previously could lead to stack overflow on constrained devices.
2006 Contributed by Doru Gucea and Simon Leet in #3464.
2007 * Undefine the ASSERT macro before defining it locally, in case it is defined
2008 in a platform header. Contributed by Abdelatif Guettouche in #3557.
2009 * Update copyright notices to use Linux Foundation guidance. As a result,
2010 the copyright of contributors other than Arm is now acknowledged, and the
2011 years of publishing are no longer tracked in the source files. This also
2012 eliminates the need for the lines declaring the files to be part of
2013 MbedTLS. Fixes #3457.
2014 * Add the command line parameter key_pwd to the ssl_client2 and ssl_server2
2015 example applications which allows to provide a password for the key file
2016 specified through the existing key_file argument. This allows the use of
2017 these applications with password-protected key files. Analogously but for
2018 ssl_server2 only, add the command line parameter key_pwd2 which allows to
2019 set a password for the key file provided through the existing key_file2
2020 argument.
2021
Janos Follath13cba682020-06-26 12:40:52 +01002022= mbed TLS 2.23.0 branch released 2020-07-01
Janos Follath19590102020-06-26 11:26:02 +01002023
2024Default behavior changes
2025 * In the experimental PSA secure element interface, change the encoding of
2026 key lifetimes to encode a persistence level and the location. Although C
2027 prototypes do not effectively change, code calling
2028 psa_register_se_driver() must be modified to pass the driver's location
2029 instead of the keys' lifetime. If the library is upgraded on an existing
2030 device, keys created with the old lifetime value will not be readable or
2031 removable through Mbed TLS after the upgrade.
2032
2033Features
2034 * New functions in the error module return constant strings for
2035 high- and low-level error codes, complementing mbedtls_strerror()
2036 which constructs a string for any error code, including compound
2037 ones, but requires a writable buffer. Contributed by Gaurav Aggarwal
2038 in #3176.
2039 * The new utility programs/ssl/ssl_context_info prints a human-readable
2040 dump of an SSL context saved with mbedtls_ssl_context_save().
2041 * Add support for midipix, a POSIX layer for Microsoft Windows.
2042 * Add new mbedtls_x509_crt_parse_der_with_ext_cb() routine which allows
2043 parsing unsupported certificate extensions via user provided callback.
2044 Contributed by Nicola Di Lieto <nicola.dilieto@gmail.com> in #3243 as
2045 a solution to #3241.
2046 * Pass the "certificate policies" extension to the callback supplied to
2047 mbedtls_x509_crt_parse_der_with_ext_cb() if it contains unsupported
2048 policies (#3419).
2049 * Added support to entropy_poll for the kern.arandom syscall supported on
2050 some BSD systems. Contributed by Nia Alarie in #3423.
2051 * Add support for Windows 2000 in net_sockets. Contributed by opatomic. #3239
2052
2053Security
2054 * Fix a side channel vulnerability in modular exponentiation that could
2055 reveal an RSA private key used in a secure enclave. Noticed by Sangho Lee,
2056 Ming-Wei Shih, Prasun Gera, Taesoo Kim and Hyesoon Kim (Georgia Institute
2057 of Technology); and Marcus Peinado (Microsoft Research). Reported by Raoul
2058 Strackx (Fortanix) in #3394.
2059 * Fix side channel in mbedtls_ecp_check_pub_priv() and
2060 mbedtls_pk_parse_key() / mbedtls_pk_parse_keyfile() (when loading a
2061 private key that didn't include the uncompressed public key), as well as
2062 mbedtls_ecp_mul() / mbedtls_ecp_mul_restartable() when called with a NULL
2063 f_rng argument. An attacker with access to precise enough timing and
2064 memory access information (typically an untrusted operating system
2065 attacking a secure enclave) could fully recover the ECC private key.
2066 Found and reported by Alejandro Cabrera Aldaya and Billy Brumley.
2067 * Fix issue in Lucky 13 counter-measure that could make it ineffective when
2068 hardware accelerators were used (using one of the MBEDTLS_SHAxxx_ALT
2069 macros). This would cause the original Lucky 13 attack to be possible in
2070 those configurations, allowing an active network attacker to recover
2071 plaintext after repeated timing measurements under some conditions.
2072 Reported and fix suggested by Luc Perneel in #3246.
2073
2074Bugfix
2075 * Fix the Visual Studio Release x64 build configuration for mbedtls itself.
2076 Completes a previous fix in Mbed TLS 2.19 that only fixed the build for
2077 the example programs. Reported in #1430 and fix contributed by irwir.
2078 * Fix undefined behavior in X.509 certificate parsing if the
2079 pathLenConstraint basic constraint value is equal to INT_MAX.
2080 The actual effect with almost every compiler is the intended
2081 behavior, so this is unlikely to be exploitable anywhere. #3192
2082 * Fix issue with a detected HW accelerated record error not being exposed
2083 due to shadowed variable. Contributed by Sander Visser in #3310.
2084 * Avoid NULL pointer dereferencing if mbedtls_ssl_free() is called with a
2085 NULL pointer argument. Contributed by Sander Visser in #3312.
2086 * Fix potential linker errors on dual world platforms by inlining
2087 mbedtls_gcc_group_to_psa(). This allows the pk.c module to link separately
2088 from psa_crypto.c. Fixes #3300.
2089 * Remove dead code in X.509 certificate parsing. Contributed by irwir in
2090 #2855.
2091 * Include asn1.h in error.c. Fixes #3328 reported by David Hu.
2092 * Fix potential memory leaks in ecp_randomize_jac() and ecp_randomize_mxz()
2093 when PRNG function fails. Contributed by Jonas Lejeune in #3318.
2094 * Remove unused macros from MSVC projects. Reported in #3297 and fix
2095 submitted in #3333 by irwir.
2096 * Add additional bounds checks in ssl_write_client_hello() preventing
2097 output buffer overflow if the configuration declared a buffer that was
2098 too small.
2099 * Set _POSIX_C_SOURCE to at least 200112L in C99 code. Reported in #3420 and
2100 fix submitted in #3421 by Nia Alarie.
2101 * Fix building library/net_sockets.c and the ssl_mail_client program on
2102 NetBSD. Contributed by Nia Alarie in #3422.
2103 * Fix false positive uninitialised variable reported by cpp-check.
2104 Contributed by Sander Visser in #3311.
2105 * Update iv and len context pointers manually when reallocating buffers
2106 using the MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH feature. This caused issues
2107 when receiving a connection with CID, when these fields were shifted
2108 in ssl_parse_record_header().
2109
2110Changes
2111 * Fix warnings about signedness issues in format strings. The build is now
2112 clean of -Wformat-signedness warnings. Contributed by Kenneth Soerensen
2113 in #3153.
2114 * Fix minor performance issue in operations on Curve25519 caused by using a
2115 suboptimal modular reduction in one place. Found and fix contributed by
2116 Aurelien Jarno in #3209.
2117 * Combine identical cases in switch statements in md.c. Contributed
2118 by irwir in #3208.
2119 * Simplify a bounds check in ssl_write_certificate_request(). Contributed
2120 by irwir in #3150.
2121 * Unify the example programs termination to call mbedtls_exit() instead of
2122 using a return command. This has been done to enable customization of the
2123 behavior in bare metal environments.
2124 * Fix mbedtls_x509_dn_gets to escape non-ASCII characters as "?".
2125 Contributed by Koh M. Nakagawa in #3326.
2126 * Use FindPython3 when cmake version >= 3.15.0
2127 * Abort the ClientHello writing function as soon as some extension doesn't
2128 fit into the record buffer. Previously, such extensions were silently
2129 dropped. As a consequence, the TLS handshake now fails when the output
2130 buffer is not large enough to hold the ClientHello.
2131 * The unit tests now rely on header files in tests/include/test and source
2132 files in tests/src. When building with make or cmake, the files in
2133 tests/src are compiled and the resulting object linked into each test
2134 executable.
2135 * The ECP module, enabled by `MBEDTLS_ECP_C`, now depends on
2136 `MBEDTLS_CTR_DRBG_C` or `MBEDTLS_HMAC_DRBG_C` for some side-channel
2137 coutermeasures. If side channels are not a concern, this dependency can
2138 be avoided by enabling the new option `MBEDTLS_ECP_NO_INTERNAL_RNG`.
2139 * Align MSVC error flag with GCC and Clang. Contributed by Carlos Gomes
2140 Martinho. #3147
2141 * Remove superfluous assignment in mbedtls_ssl_parse_certificate(). Reported
2142 in #3182 and fix submitted by irwir. #3217
2143 * Fix typo in XTS tests. Reported and fix submitted by Kxuan. #3319
2144
Janos Follath876e0252020-04-08 17:15:18 +01002145= mbed TLS 2.22.0 branch released 2020-04-14
Andres Amaya Garcia84b4e792018-12-05 22:39:38 +00002146
2147New deprecations
2148 * Deprecate MBEDTLS_SSL_HW_RECORD_ACCEL that enables function hooks in the
2149 SSL module for hardware acceleration of individual records.
Andrzej Kurek90c6e842020-04-03 05:25:29 -04002150 * Deprecate mbedtls_ssl_get_max_frag_len() in favour of
2151 mbedtls_ssl_get_output_max_frag_len() and
2152 mbedtls_ssl_get_input_max_frag_len() to be more precise about which max
2153 fragment length is desired.
Andres Amaya Garcia84b4e792018-12-05 22:39:38 +00002154
Manuel Pégourié-Gonnard824655c2020-03-11 12:51:42 +01002155Security
2156 * Fix issue in DTLS handling of new associations with the same parameters
2157 (RFC 6347 section 4.2.8): an attacker able to send forged UDP packets to
2158 the server could cause it to drop established associations with
2159 legitimate clients, resulting in a Denial of Service. This could only
2160 happen when MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE was enabled in config.h
2161 (which it is by default).
Manuel Pégourié-Gonnarda4aa89b2020-03-25 12:41:29 +01002162 * Fix side channel in ECC code that allowed an adversary with access to
2163 precise enough timing and memory access information (typically an
2164 untrusted operating system attacking a secure enclave) to fully recover
2165 an ECDSA private key. Found and reported by Alejandro Cabrera Aldaya,
2166 Billy Brumley and Cesar Pereida Garcia. CVE-2020-10932
Gilles Peskine1c668132019-09-27 14:07:00 +02002167 * Fix a potentially remotely exploitable buffer overread in a
2168 DTLS client when parsing the Hello Verify Request message.
Manuel Pégourié-Gonnard824655c2020-03-11 12:51:42 +01002169
Janos Follathee856862020-04-08 16:58:36 +01002170Features
2171 * The new build option MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH automatically
2172 resizes the I/O buffers before and after handshakes, reducing the memory
2173 consumption during application data transfer.
2174
Manuel Pégourié-Gonnard830540b2020-02-26 09:58:26 +01002175Bugfix
2176 * Fix compilation failure when both MBEDTLS_SSL_PROTO_DTLS and
2177 MBEDTLS_SSL_HW_RECORD_ACCEL are enabled.
irwir6527bd62019-09-21 18:51:25 +03002178 * Remove a spurious check in ssl_parse_client_psk_identity that triggered
2179 a warning with some compilers. Fix contributed by irwir in #2856.
Janos Follath940bc002020-04-09 09:34:47 +01002180 * Fix a function name in a debug message. Contributed by Ercan Ozturk in
2181 #3013.
Manuel Pégourié-Gonnard830540b2020-02-26 09:58:26 +01002182
Gilles Peskine2f084fe2020-03-02 21:48:03 +01002183Changes
2184 * Mbed Crypto is no longer a Git submodule. The crypto part of the library
2185 is back directly in the present repository.
Andrzej Kurek90c6e842020-04-03 05:25:29 -04002186 * Split mbedtls_ssl_get_max_frag_len() into
2187 mbedtls_ssl_get_output_max_frag_len() and
2188 mbedtls_ssl_get_input_max_frag_len() to ensure that a sufficient input
2189 buffer is allocated by the server (if MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
2190 is defined), regardless of what MFL was configured for it.
Gilles Peskine2f084fe2020-03-02 21:48:03 +01002191
Janos Follath138c2ea2020-02-19 14:32:24 +00002192= mbed TLS 2.21.0 branch released 2020-02-20
Jaeden Amero62236d72020-01-24 18:20:22 +00002193
Andres Amaya Garcia09634242018-11-29 09:55:41 +00002194New deprecations
2195 * Deprecate MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO that enables parsing
2196 SSLv2 ClientHello messages.
Andres Amaya Garcia88c2cc72018-11-29 09:56:02 +00002197 * Deprecate MBEDTLS_SSL_PROTO_SSL3 that enables support for SSLv3.
Gilles Peskine907e95a2020-01-23 15:51:40 +01002198 * Deprecate for MBEDTLS_PKCS11_C, the wrapper around the pkcs11-helper
2199 library which allows TLS authentication to use keys stored in a
2200 PKCS#11 token such as a smartcard.
Andres Amaya Garcia09634242018-11-29 09:55:41 +00002201
Gilles Peskinef142d4c2020-02-11 19:05:03 +01002202Security
2203 * Fix potential memory overread when performing an ECDSA signature
2204 operation. The overread only happens with cryptographically low
2205 probability (of the order of 2^-n where n is the bitsize of the curve)
2206 unless the RNG is broken, and could result in information disclosure or
2207 denial of service (application crash or extra resource consumption).
2208 Found by Auke Zeilstra and Peter Schwabe, using static analysis.
Gilles Peskine25a5c092020-02-11 19:12:49 +01002209 * To avoid a side channel vulnerability when parsing an RSA private key,
2210 read all the CRT parameters from the DER structure rather than
2211 reconstructing them. Found by Alejandro Cabrera Aldaya and Billy Bob
2212 Brumley. Reported and fix contributed by Jack Lloyd.
2213 ARMmbed/mbed-crypto#352
Gilles Peskinef142d4c2020-02-11 19:05:03 +01002214
2215Features
2216 * The new build option MBEDTLS_SHA512_NO_SHA384 allows building SHA-512
2217 support without SHA-384.
2218
2219API changes
2220 * Change the encoding of key types and curves in the PSA API. The new
2221 values are aligned with the upcoming release of the PSA Crypto API
2222 specification version 1.0.0. The main change which may break some
2223 existing code is that elliptic curve key types no longer encode the
2224 exact curve: a psa_ecc_curve_t or psa_key_type_t value only encodes
2225 a curve family and the key size determines the exact curve (for example,
2226 PSA_ECC_CURVE_SECP_R1 with 256 bits is P256R1). ARMmbed/mbed-crypto#330
2227
Jaeden Amero62236d72020-01-24 18:20:22 +00002228Bugfix
Gilles Peskine4073d4e2020-01-22 18:58:20 +01002229 * Fix an unchecked call to mbedtls_md() in the x509write module.
Gilles Peskine80fcace2020-01-22 19:18:35 +01002230 * Fix build failure with MBEDTLS_ZLIB_SUPPORT enabled. Reported by
2231 Jack Lloyd in #2859. Fix submitted by jiblime in #2963.
Gilles Peskine393defe2020-02-11 15:31:18 +01002232 * Fix some false-positive uninitialized variable warnings in X.509. Fix
2233 contributed by apple-ihack-geek in #2663.
Gilles Peskine25a5c092020-02-11 19:12:49 +01002234 * Fix a possible error code mangling in psa_mac_verify_finish() when
2235 a cryptographic accelerator fails. ARMmbed/mbed-crypto#345
Janos Follathd1692ee2020-02-19 11:23:55 +00002236 * Fix a bug in mbedtls_pk_parse_key() that would cause it to accept some
2237 RSA keys that would later be rejected by functions expecting private
2238 keys. Found by Catena cyber using oss-fuzz (issue 20467).
2239 * Fix a bug in mbedtls_pk_parse_key() that would cause it to
2240 accept some RSA keys with invalid values by silently fixing those values.
Jaeden Amero62236d72020-01-24 18:20:22 +00002241
Jaeden Amerod56a2af2020-01-15 18:07:20 +00002242= mbed TLS 2.20.0 branch released 2020-01-15
irwir6c0da642019-09-26 21:07:41 +03002243
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002244Default behavior changes
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002245 * The initial seeding of a CTR_DRBG instance makes a second call to the
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002246 entropy function to obtain entropy for a nonce if the entropy size is less
2247 than 3/2 times the key size. In case you want to disable the extra call to
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002248 grab entropy, you can call mbedtls_ctr_drbg_set_nonce_len() to force the
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002249 nonce length to 0.
2250
2251Security
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002252 * Enforce that mbedtls_entropy_func() gathers a total of
2253 MBEDTLS_ENTROPY_BLOCK_SIZE bytes or more from strong sources. In the
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002254 default configuration, on a platform with a single entropy source, the
2255 entropy module formerly only grabbed 32 bytes, which is good enough for
2256 security if the source is genuinely strong, but less than the expected 64
2257 bytes (size of the entropy accumulator).
Gilles Peskinee3b285d2020-01-27 14:01:42 +01002258 * Zeroize local variables in mbedtls_internal_aes_encrypt() and
2259 mbedtls_internal_aes_decrypt() before exiting the function. The value of
2260 these variables can be used to recover the last round key. To follow best
2261 practice and to limit the impact of buffer overread vulnerabilities (like
2262 Heartbleed) we need to zeroize them before exiting the function.
2263 Issue reported by Tuba Yavuz, Farhaan Fowze, Ken (Yihang) Bai,
2264 Grant Hernandez, and Kevin Butler (University of Florida) and
2265 Dave Tian (Purdue University).
2266 * Fix side channel vulnerability in ECDSA. Our bignum implementation is not
2267 constant time/constant trace, so side channel attacks can retrieve the
2268 blinded value, factor it (as it is smaller than RSA keys and not guaranteed
2269 to have only large prime factors), and then, by brute force, recover the
2270 key. Reported by Alejandro Cabrera Aldaya and Billy Brumley.
2271 * Fix side channel vulnerability in ECDSA key generation. Obtaining precise
2272 timings on the comparison in the key generation enabled the attacker to
2273 learn leading bits of the ephemeral key used during ECDSA signatures and to
2274 recover the private key. Reported by Jeremy Dubeuf.
2275 * Catch failure of AES functions in mbedtls_ctr_drbg_random(). Uncaught
2276 failures could happen with alternative implementations of AES. Bug
2277 reported and fix proposed by Johan Uppman Bruce and Christoffer Lauri,
2278 Sectra.
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002279
2280Features
2281 * Key derivation inputs in the PSA API can now either come from a key object
2282 or from a buffer regardless of the step type.
2283 * The CTR_DRBG module can grab a nonce from the entropy source during the
2284 initial seeding. The default nonce length is chosen based on the key size
2285 to achieve the security strength defined by NIST SP 800-90A. You can
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002286 change it with mbedtls_ctr_drbg_set_nonce_len().
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002287 * Add ENUMERATED tag support to the ASN.1 module. Contributed by
Gilles Peskine50f57702020-01-22 19:02:59 +01002288 msopiha-linaro in ARMmbed/mbed-crypto#307.
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002289
2290API changes
2291 * In the PSA API, forbid zero-length keys. To pass a zero-length input to a
2292 key derivation function, use a buffer instead (this is now always
2293 possible).
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002294 * Rename psa_asymmetric_sign() to psa_sign_hash() and
2295 psa_asymmetric_verify() to psa_verify_hash().
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002296
irwir6c0da642019-09-26 21:07:41 +03002297Bugfix
2298 * Fix an incorrect size in a debugging message. Reported and fix
2299 submitted by irwir. Fixes #2717.
2300 * Fix an unused variable warning when compiling without DTLS.
2301 Reported and fix submitted by irwir. Fixes #2800.
2302 * Remove a useless assignment. Reported and fix submitted by irwir.
2303 Fixes #2801.
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002304 * Fix a buffer overflow in the PSA HMAC code when using a long key with an
Gilles Peskine50f57702020-01-22 19:02:59 +01002305 unsupported algorithm. Fixes ARMmbed/mbed-crypto#254.
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002306 * Fix mbedtls_asn1_get_int to support any number of leading zeros. Credit
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002307 to OSS-Fuzz for finding a bug in an intermediate version of the fix.
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002308 * Fix mbedtls_asn1_get_bitstring_null to correctly parse bitstrings of at
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002309 most 2 bytes.
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002310 * mbedtls_ctr_drbg_set_entropy_len() and
2311 mbedtls_hmac_drbg_set_entropy_len() now work if you call them before
2312 mbedtls_ctr_drbg_seed() or mbedtls_hmac_drbg_seed().
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002313
2314Changes
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002315 * Remove the technical possibility to define custom mbedtls_md_info
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002316 structures, which was exposed only in an internal header.
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002317 * psa_close_key(0) and psa_destroy_key(0) now succeed (doing nothing, as
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002318 before).
2319 * Variables containing error codes are now initialized to an error code
2320 rather than success, so that coding mistakes or memory corruption tends to
2321 cause functions to return this error code rather than a success. There are
2322 no known instances where this changes the behavior of the library: this is
Gilles Peskine50f57702020-01-22 19:02:59 +01002323 merely a robustness improvement. ARMmbed/mbed-crypto#323
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002324 * Remove a useless call to mbedtls_ecp_group_free(). Contributed by
Gilles Peskine50f57702020-01-22 19:02:59 +01002325 Alexander Krizhanovsky in ARMmbed/mbed-crypto#210.
Gilles Peskine6a4c3402020-01-22 18:28:24 +01002326 * Speed up PBKDF2 by caching the digest calculation. Contributed by Jack
Gilles Peskine50f57702020-01-22 19:02:59 +01002327 Lloyd and Fortanix Inc in ARMmbed/mbed-crypto#277.
Gilles Peskine8c7d2c22020-01-22 19:02:09 +01002328 * Small performance improvement of mbedtls_mpi_div_mpi(). Contributed by
Gilles Peskine50f57702020-01-22 19:02:59 +01002329 Alexander Krizhanovsky in ARMmbed/mbed-crypto#308.
irwir6c0da642019-09-26 21:07:41 +03002330
Jaeden Amero914a5072019-09-18 13:35:57 +01002331= mbed TLS 2.19.1 branch released 2019-09-16
2332
2333Features
Zachary J. Fields96134ef2020-01-27 16:12:02 -06002334 * Declare include headers as PUBLIC to propagate to CMake project consumers
2335 Contributed by Zachary J. Fields in PR #2949.
Jaeden Amero914a5072019-09-18 13:35:57 +01002336 * Add nss_keylog to ssl_client2 and ssl_server2, enabling easier analysis of
2337 TLS sessions with tools like Wireshark.
2338
2339API Changes
2340 * Make client_random and server_random const in
2341 mbedtls_ssl_export_keys_ext_t, so that the key exporter is discouraged
2342 from modifying the client/server hello.
2343
Gilles Peskine3ca1bcc2019-09-30 17:20:23 +02002344Bugfix
Gilles Peskine393defe2020-02-11 15:31:18 +01002345 * Fix some false-positive uninitialized variable warnings in crypto. Fix
Gilles Peskine3ca1bcc2019-09-30 17:20:23 +02002346 contributed by apple-ihack-geek in #2663.
2347
Jaeden Amero4197f0e2019-09-06 14:40:10 +01002348= mbed TLS 2.19.0 branch released 2019-09-06
Jaeden Amerod5d01a02019-03-26 14:50:06 +00002349
Gilles Peskine52157832018-08-11 00:51:04 +02002350Security
Jaeden Amero4197f0e2019-09-06 14:40:10 +01002351 * Fix a missing error detection in ECJPAKE. This could have caused a
2352 predictable shared secret if a hardware accelerator failed and the other
2353 side of the key exchange had a similar bug.
Gilles Peskine52157832018-08-11 00:51:04 +02002354 * When writing a private EC key, use a constant size for the private
2355 value, as specified in RFC 5915. Previously, the value was written
2356 as an ASN.1 INTEGER, which caused the size of the key to leak
2357 about 1 bit of information on average and could cause the value to be
2358 1 byte too large for the output buffer.
Janos Follath12fff152019-01-04 16:18:46 +00002359 * The deterministic ECDSA calculation reused the scheme's HMAC-DRBG to
2360 implement blinding. Because of this for the same key and message the same
2361 blinding value was generated. This reduced the effectiveness of the
2362 countermeasure and leaked information about the private key through side
2363 channels. Reported by Jack Lloyd.
Gilles Peskine52157832018-08-11 00:51:04 +02002364
Jaeden Ameroc73fde72019-03-27 14:50:21 +00002365Features
Manuel Pégourié-Gonnard64722632019-05-24 10:23:55 +02002366 * Add new API functions mbedtls_ssl_session_save() and
Manuel Pégourié-Gonnard686adb42019-06-03 09:55:16 +02002367 mbedtls_ssl_session_load() to allow serializing a session, for example to
Manuel Pégourié-Gonnard64722632019-05-24 10:23:55 +02002368 store it in non-volatile storage, and later using it for TLS session
2369 resumption.
Jarno Lamsa9e90df52019-08-23 09:08:31 +03002370 * Add a new API function mbedtls_ssl_check_record() to allow checking that
2371 an incoming record is valid, authentic and has not been seen before. This
2372 feature can be used alongside Connection ID and SSL context serialisation.
2373 The feature is enabled at compile-time by MBEDTLS_SSL_RECORD_CHECKING
2374 option.
Jaeden Amero49fcbea2019-08-30 15:50:45 +01002375 * New implementation of X25519 (ECDH using Curve25519) from Project Everest
2376 (https://project-everest.github.io/). It can be enabled at compile time
2377 with MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED. This implementation is formally
2378 verified and significantly faster, but is only supported on x86 platforms
2379 (32-bit and 64-bit) using GCC, Clang or Visual Studio. Contributed by
2380 Christoph Wintersteiger from Microsoft Research.
Jaeden Amero8dd6bc72019-09-03 16:41:51 +01002381 * Add mbedtls_net_close(), enabling the building of forking servers where
2382 the parent process closes the client socket and continue accepting, and
2383 the child process closes the listening socket and handles the client
2384 socket. Contributed by Robert Larsen in #2803.
Jaeden Ameroc73fde72019-03-27 14:50:21 +00002385
Gilles Peskine60b29d62019-08-14 18:37:59 +02002386API Changes
Gilles Peskine60b29d62019-08-14 18:37:59 +02002387 * Add DER-encoded test CRTs to library/certs.c, allowing
2388 the example programs ssl_server2 and ssl_client2 to be run
2389 if MBEDTLS_FS_IO and MBEDTLS_PEM_PARSE_C are unset. Fixes #2254.
2390 * The HAVEGE state type now uses uint32_t elements instead of int.
Jaeden Amero49fcbea2019-08-30 15:50:45 +01002391 * The functions mbedtls_ecp_curve_list() and mbedtls_ecp_grp_id_list() now
2392 list all curves for which at least one of ECDH or ECDSA is supported, not
2393 just curves for which both are supported. Call mbedtls_ecdsa_can_do() or
2394 mbedtls_ecdh_can_do() on each result to check whether each algorithm is
2395 supported.
Jaeden Amero4197f0e2019-09-06 14:40:10 +01002396 * The new function mbedtls_ecdsa_sign_det_ext() is similar to
2397 mbedtls_ecdsa_sign_det() but allows passing an external RNG for the
2398 purpose of blinding.
Janos Follath12fff152019-01-04 16:18:46 +00002399
2400New deprecations
2401 * Deprecate mbedtls_ecdsa_sign_det() in favor of a functions that can take an
2402 RNG function as an input.
2403 * Calling mbedtls_ecdsa_write_signature() with NULL as the f_rng argument
2404 is now deprecated.
Gilles Peskine60b29d62019-08-14 18:37:59 +02002405
Jaeden Amerod5d01a02019-03-26 14:50:06 +00002406Bugfix
Hanno Becker3c03a882019-06-04 10:27:43 +01002407 * Fix missing bounds checks in X.509 parsing functions that could
2408 lead to successful parsing of ill-formed X.509 CRTs. Fixes #2437.
2409 * Fix multiple X.509 functions previously returning ASN.1 low-level error
2410 codes to always wrap these codes into X.509 high level error codes before
2411 returning. Fixes #2431.
Simon Butcherf35bb5a2019-04-18 15:57:30 +01002412 * Fix to allow building test suites with any warning that detects unused
2413 functions. Fixes #1628.
Jaeden Ameroa152e422019-05-29 09:38:29 +01002414 * Fix typo in net_would_block(). Fixes #528 reported by github-monoculture.
Jaeden Ameroa1809262019-05-30 13:15:33 +01002415 * Remove redundant include file in timing.c. Fixes #2640 reported by irwir.
Jaeden Amero32eb58f2019-05-30 13:18:24 +01002416 * Fix build failure when building with mingw on Windows by including
2417 stdarg.h where needed. Fixes #2656.
Jaeden Amero4f4af6e2019-06-03 08:13:10 +01002418 * Fix Visual Studio Release x64 build configuration by inheriting
2419 PlatformToolset from the project configuration. Fixes #1430 reported by
2420 irwir.
Jaeden Amerod4311042019-06-03 08:27:16 +01002421 * Enable Suite B with subset of ECP curves. Make sure the code compiles even
2422 if some curves are not defined. Fixes #1591 reported by dbedev.
Gilles Peskinef3820e32019-06-07 16:42:35 +02002423 * Fix misuse of signed arithmetic in the HAVEGE module. #2598
Hanno Becker73540c02019-05-04 08:18:09 +01002424 * Avoid use of statically sized stack buffers for certificate writing.
2425 This previously limited the maximum size of DER encoded certificates
2426 in mbedtls_x509write_crt_der() to 2Kb. Reported by soccerGB in #2631.
Sébastien Duquette661d7252019-06-23 17:45:26 -04002427 * Fix partial zeroing in x509_get_other_name. Found and fixed by ekse, #2716.
Gilles Peskine55603ee2019-08-03 14:08:46 +02002428 * Update test certificates that were about to expire. Reported by
2429 Bernhard M. Wiedemann in #2357.
Gilles Peskinea5cb7d42019-08-05 11:34:11 +02002430 * Fix the build on ARMv5TE in ARM mode to not use assembly instructions
2431 that are only available in Thumb mode. Fix contributed by Aurelien Jarno
2432 in #2169.
Hanno Beckerbf84d502019-07-19 12:52:08 +01002433 * Fix propagation of restart contexts in restartable EC operations.
2434 This could previously lead to segmentation faults in builds using an
2435 address-sanitizer and enabling but not using MBEDTLS_ECP_RESTARTABLE.
Jaeden Ameroa66fc942019-09-03 13:45:34 +01002436 * Fix memory leak in in mpi_miller_rabin(). Contributed by
2437 Jens Wiklander <jens.wiklander@linaro.org> in #2363
Andy Gross1f627142019-01-30 10:25:53 -06002438 * Improve code clarity in x509_crt module, removing false-positive
2439 uninitialized variable warnings on some recent toolchains (GCC8, etc).
2440 Discovered and fixed by Andy Gross (Linaro), #2392.
Jaeden Ameroaeb5a4a2019-09-05 14:43:14 +01002441 * Fix bug in endianness conversion in bignum module. This lead to
2442 functionally incorrect code on bigendian systems which don't have
2443 __BYTE_ORDER__ defined. Reported by Brendan Shanks. Fixes #2622.
Jaeden Amero4e0db562019-08-27 11:18:28 +01002444
Jaeden Amerod5d01a02019-03-26 14:50:06 +00002445Changes
Hanno Becker136512b2019-05-30 11:16:02 +01002446 * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821.
Gilles Peskinec7ad1222019-06-13 16:44:19 +02002447 * Make it easier to define MBEDTLS_PARAM_FAILED as assert (which config.h
2448 suggests). #2671
Jaeden Amerobefe1e152019-06-03 09:14:14 +01002449 * Make `make clean` clean all programs always. Fixes #1862.
Peter Kolbuse4e2d3a2018-12-24 09:04:54 -06002450 * Add a Dockerfile and helper scripts (all-in-docker.sh, basic-in-docker.sh,
2451 docker-env.sh) to simplify running test suites on a Linux host. Contributed
2452 by Peter Kolbus (Garmin).
Jaeden Amerof473fa82019-07-09 13:41:54 +01002453 * Add `reproducible` option to `ssl_client2` and `ssl_server2` to enable
2454 test runs without variability. Contributed by Philippe Antoine (Catena
2455 cyber) in #2681.
2456 * Extended .gitignore to ignore Visual Studio artifacts. Fixed by ConfusedSushi.
Philippe Antoine801194b2019-06-04 14:17:41 +02002457 * Adds fuzz targets, especially for continuous fuzzing with OSS-Fuzz.
2458 Contributed by Philippe Antoine (Catena cyber).
Gilles Peskine2f084fe2020-03-02 21:48:03 +01002459 * Remove the crypto part of the library from Mbed TLS. The crypto
2460 code and tests are now only available via Mbed Crypto, which
2461 Mbed TLS references as a Git submodule.
Jaeden Amerod5d01a02019-03-26 14:50:06 +00002462
Jaeden Amero3aeb13e2019-06-18 17:27:20 +01002463= mbed TLS 2.18.1 branch released 2019-07-12
2464
Jaeden Ameroded319d2019-05-30 13:18:24 +01002465Bugfix
2466 * Fix build failure when building with mingw on Windows by including
2467 stdarg.h where needed. Fixes #2656.
2468
Jaeden Amero3aeb13e2019-06-18 17:27:20 +01002469Changes
2470 * Enable building of Mbed TLS as a CMake subproject. Suggested and fixed by
2471 Ashley Duncan in #2609.
2472
Jaeden Amerob1c72f52019-06-11 17:18:09 +01002473= mbed TLS 2.18.0 branch released 2019-06-11
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002474
Hanno Beckerac4172c2019-01-31 09:27:04 +00002475Features
2476 * Add the Any Policy certificate policy oid, as defined in
2477 rfc 5280 section 4.2.1.4.
2478 * It is now possible to use NIST key wrap mode via the mbedtls_cipher API.
2479 Contributed by Jack Lloyd and Fortanix Inc.
Andres Amaya Garciace049512019-02-20 10:00:03 +00002480 * Add the Wi-SUN Field Area Network (FAN) device extended key usage.
2481 * Add the oid certificate policy x509 extension.
Andres Amaya Garcia4a512282018-10-30 18:21:41 +00002482 * It is now possible to perform RSA PKCS v1.5 signatures with RIPEMD-160 digest.
Andres Amaya Garcia22a89052018-11-26 20:57:49 +00002483 Contributed by Jack Lloyd and Fortanix Inc.
2484 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes,
Hanno Beckerac4172c2019-01-31 09:27:04 +00002485 and the used tls-prf.
2486 * Add public API for tls-prf function, according to requested enum.
2487 * Add support for parsing otherName entries in the Subject Alternative Name
2488 X.509 certificate extension, specifically type hardware module name,
Hanno Beckere31505d2019-02-07 13:42:45 +00002489 as defined in RFC 4108 section 5.
2490 * Add support for parsing certificate policies extension, as defined in
2491 RFC 5280 section 4.2.1.4. Currently, only the "Any Policy" policy is
2492 supported.
2493 * List all SAN types in the subject_alt_names field of the certificate.
2494 Resolves #459.
2495 * Add support for draft-05 of the Connection ID extension, as specified
Paul Bakker5121ce52009-01-03 21:22:43 +00002496 in https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05.
2497 The Connection ID extension allows to keep DTLS connections beyond the
Paul Bakker99ed6782011-01-05 14:48:42 +00002498 lifetime of the underlying transport by adding a connection identifier
2499 to the DTLS record header. This identifier can be used to associated an
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002500 incoming record with the correct connection data even after the peer has
2501 changed its IP or port. The feature is enabled at compile-time by setting
Hanno Beckerac4172c2019-01-31 09:27:04 +00002502 MBEDTLS_SSL_DTLS_CONNECTION_ID (disabled by default), and at run-time
2503 through the new APIs mbedtls_ssl_conf_cid() and mbedtls_ssl_set_cid().
2504
Paul Bakker5121ce52009-01-03 21:22:43 +00002505
Jaeden Amero4e0db562019-08-27 11:18:28 +01002506API Changes
2507 * Extend the MBEDTLS_SSL_EXPORT_KEYS to export the handshake randbytes,
2508 and the used tls-prf.
2509 * Add public API for tls-prf function, according to requested enum.
2510
Paul Bakker5121ce52009-01-03 21:22:43 +00002511Bugfix
2512 * Fix private key DER output in the key_app_writer example. File contents
2513 were shifted by one byte, creating an invalid ASN.1 tag. Fixed by
2514 Christian Walther in #2239.
2515 * Fix potential memory leak in X.509 self test. Found and fixed by
2516 Junhwan Park, #2106.
2517 * Reduce stack usage of hkdf tests. Fixes #2195.
2518 * Fix 1-byte buffer overflow in mbedtls_mpi_write_string() when
2519 used with negative inputs. Found by Guido Vranken in #2404. Credit to
2520 OSS-Fuzz.
2521 * Fix bugs in the AEAD test suite which would be exposed by ciphers which
2522 either used both encrypt and decrypt key schedules, or which perform padding.
2523 GCM and CCM were not affected. Fixed by Jack Lloyd.
2524 * Fix incorrect default port number in ssl_mail_client example's usage.
2525 Found and fixed by irwir. #2337
2526 * Add psa_util.h to test/cpp_dummy_build to fix build_default_make_gcc_and_cxx.
2527 Fixed by Peter Kolbus (Garmin). #2579
2528 * Add missing parentheses around parameters in the definition of the
Paul Bakker99ed6782011-01-05 14:48:42 +00002529 public macro MBEDTLS_X509_ID_FLAG. This could lead to invalid evaluation
2530 in case operators binding less strongly than subtraction were used
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002531 for the parameter.
2532 * Add a check for MBEDTLS_X509_CRL_PARSE_C in ssl_server2, guarding the crl
Hanno Beckerac4172c2019-01-31 09:27:04 +00002533 sni entry parameter. Reported by inestlerode in #560.
2534 * Set the next sequence of the subject_alt_name to NULL when deleting
2535 sequence on failure. Found and fix suggested by Philippe Antoine.
2536 Credit to OSS-Fuzz.
2537
Paul Bakker5121ce52009-01-03 21:22:43 +00002538Changes
2539 * Server's RSA certificate in certs.c was SHA-1 signed. In the default
2540 mbedTLS configuration only SHA-2 signed certificates are accepted.
2541 This certificate is used in the demo server programs, which lead the
2542 client programs to fail at the peer's certificate verification
2543 due to an unacceptable hash signature. The certificate has been
2544 updated to one that is SHA-256 signed. Fix contributed by
2545 Illya Gerasymchuk.
2546 * Return from various debugging routines immediately if the
2547 provided SSL context is unset.
2548 * Remove dead code from bignum.c in the default configuration.
2549 Found by Coverity, reported and fixed by Peter Kolbus (Garmin). Fixes #2309.
2550 * Add test for minimal value of MBEDTLS_MPI_WINDOW_SIZE to all.sh.
2551 Contributed by Peter Kolbus (Garmin).
2552 * Change wording in the `mbedtls_ssl_conf_max_frag_len()`'s documentation to
2553 improve clarity. Fixes #2258.
2554
2555= mbed TLS 2.17.0 branch released 2019-03-19
Paul Bakker99ed6782011-01-05 14:48:42 +00002556
2557Features
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002558 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`
2559 which allows copy-less parsing of DER encoded X.509 CRTs,
Hanno Beckerac4172c2019-01-31 09:27:04 +00002560 at the cost of additional lifetime constraints on the input
2561 buffer, but at the benefit of reduced RAM consumption.
2562 * Add a new function mbedtls_asn1_write_named_bitstring() to write ASN.1
2563 named bitstring in DER as required by RFC 5280 Appendix B.
2564 * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites
2565 from the default list (enabled by default). See
2566 https://sweet32.info/SWEET32_CCS16.pdf.
2567
2568API Changes
2569 * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`.
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002570 See the Features section for more information.
2571 * Allow to opt in to the removal the API mbedtls_ssl_get_peer_cert()
2572 for the benefit of saving RAM, by disabling the new compile-time
2573 option MBEDTLS_SSL_KEEP_PEER_CERTIFICATE (enabled by default for
2574 API stability). Disabling this option makes mbedtls_ssl_get_peer_cert()
2575 always return NULL, and removes the peer_cert field from the
2576 mbedtls_ssl_session structure which otherwise stores the peer's
Gilles Peskineccf8ba02018-11-07 22:39:16 +01002577 certificate.
2578
2579Security
2580 * Make mbedtls_ecdh_get_params return an error if the second key
2581 belongs to a different group from the first. Before, if an application
2582 passed keys that belonged to different group, the first key's data was
2583 interpreted according to the second group, which could lead to either
2584 an error or a meaningless output from mbedtls_ecdh_get_params. In the
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002585 latter case, this could expose at most 5 bits of the private key.
2586
2587Bugfix
2588 * Fix a compilation issue with mbedtls_ecp_restart_ctx not being defined
2589 when MBEDTLS_ECP_ALT is defined. Reported by jwhui. Fixes #2242.
2590 * Run the AD too long test only if MBEDTLS_CCM_ALT is not defined.
2591 Raised as a comment in #1996.
2592 * Reduce the stack consumption of mbedtls_mpi_fill_random() which could
2593 previously lead to a stack overflow on constrained targets.
2594 * Add `MBEDTLS_SELF_TEST` for the mbedtls_self_test functions
2595 in the header files, which missed the precompilation check. #971
2596 * Fix returning the value 1 when mbedtls_ecdsa_genkey failed.
2597 * Remove a duplicate #include in a sample program. Fixed by Masashi Honma #2326.
Hanno Becker1b6d2b22019-01-10 09:22:16 +00002598 * Remove the mbedtls namespacing from the header file, to fix a "file not found"
2599 build error. Fixed by Haijun Gu #2319.
Ron Eldor8a6917d2018-11-27 10:33:38 +02002600 * Fix signed-to-unsigned integer conversion warning
2601 in X.509 module. Fixes #2212.
Peter Kolbus995d5c12019-02-03 08:41:41 -06002602 * Reduce stack usage of `mpi_write_hlp()` by eliminating recursion.
2603 Fixes #2190.
Andres Amaya Garciad588ff72018-09-26 10:59:20 +01002604 * Fix false failure in all.sh when backup files exist in include/mbedtls
2605 (e.g. config.h.bak). Fixed by Peter Kolbus (Garmin) #2407.
2606 * Ensure that unused bits are zero when writing ASN.1 bitstrings when using
2607 mbedtls_asn1_write_bitstring().
2608 * Fix issue when writing the named bitstrings in KeyUsage and NsCertType
2609 extensions in CSRs and CRTs that caused these bitstrings to not be encoded
Simon Butcher41f95192018-12-01 18:42:47 +00002610 correctly as trailing zeroes were not accounted for as unused bits in the
2611 leading content octet. Fixes #1610.
Hanno Beckerbd9d51d2019-01-30 15:14:21 +00002612
2613Changes
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002614 * Reduce RAM consumption during session renegotiation by not storing
2615 the peer CRT chain and session ticket twice.
2616 * Include configuration file in all header files that use configuration,
2617 instead of relying on other header files that they include.
2618 Inserted as an enhancement for #1371
Andrzej Kurek8764ccc2019-02-05 04:57:13 -05002619 * Add support for alternative CSR headers, as used by Microsoft and defined
2620 in RFC 7468. Found by Michael Ernst. Fixes #767.
2621 * Correct many misspellings. Fixed by MisterDA #2371.
2622 * Provide an abstraction of vsnprintf to allow alternative implementations
2623 for platforms that don't provide it. Based on contributions by Joris Aerts
2624 and Nathaniel Wesley Filardo.
2625 * Fix clobber list in MIPS assembly for large integer multiplication.
2626 Previously, this could lead to functionally incorrect assembly being
2627 produced by some optimizing compilers, showing up as failures in
k-stachowiakc5a4a132019-02-05 09:11:58 +01002628 e.g. RSA or ECC signature operations. Reported in #1722, fix suggested
2629 by Aurelien Jarno and submitted by Jeffrey Martin.
Andres Amaya Garciaaabe52f2018-10-16 22:18:53 +01002630 * Reduce the complexity of the timing tests. They were assuming more than the
2631 underlying OS actually guarantees.
k-stachowiakcddbd012019-02-19 12:40:34 +01002632 * Fix configuration queries in ssl-opt.h. #2030
2633 * Ensure that ssl-opt.h can be run in OS X. #2029
Andres Amaya Garciaf8dffb32019-02-19 20:14:00 +00002634 * Re-enable certain interoperability tests in ssl-opt.sh which had previously
2635 been disabled for lack of a sufficiently recent version of GnuTLS on the CI.
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002636 * Ciphersuites based on 3DES now have the lowest priority by default when
2637 they are enabled.
2638
2639= mbed TLS 2.16.0 branch released 2018-12-21
2640
2641Features
2642 * Add a new config.h option of MBEDTLS_CHECK_PARAMS that enables validation
2643 of parameters in the API. This allows detection of obvious misuses of the
2644 API, such as passing NULL pointers. The API of existing functions hasn't
2645 changed, but requirements on parameters have been made more explicit in
2646 the documentation. See the corresponding API documentation for each
2647 function to see for which parameter values it is defined. This feature is
2648 disabled by default. See its API documentation in config.h for additional
2649 steps you have to take when enabling it.
2650
2651API Changes
2652 * The following functions in the random generator modules have been
2653 deprecated and replaced as shown below. The new functions change
2654 the return type from void to int to allow returning error codes when
2655 using MBEDTLS_<MODULE>_ALT for the underlying AES or message digest
2656 primitive. Fixes #1798.
2657 mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret()
2658 mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret()
2659 * Extend ECDH interface to enable alternative implementations.
2660 * Deprecate error codes of the form MBEDTLS_ERR_xxx_INVALID_KEY_LENGTH for
2661 ARIA, CAMELLIA and Blowfish. These error codes will be replaced by
2662 the more generic per-module error codes MBEDTLS_ERR_xxx_BAD_INPUT_DATA.
2663 * Additional parameter validation checks have been added for the following
2664 modules - AES, ARIA, Blowfish, CAMELLIA, CCM, GCM, DHM, ECP, ECDSA, ECDH,
2665 ECJPAKE, SHA, Chacha20 and Poly1305, cipher, pk, RSA, and MPI.
2666 Where modules have had parameter validation added, existing parameter
2667 checks may have changed. Some modules, such as Chacha20 had existing
2668 parameter validation whereas other modules had little. This has now been
2669 changed so that the same level of validation is present in all modules, and
2670 that it is now optional with the MBEDTLS_CHECK_PARAMS flag which by default
2671 is off. That means that checks which were previously present by default
2672 will no longer be.
2673
2674New deprecations
2675 * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update
2676 in favor of functions that can return an error code.
2677
2678Bugfix
2679 * Fix for Clang, which was reporting a warning for the bignum.c inline
2680 assembly for AMD64 targets creating string literals greater than those
2681 permitted by the ISO C99 standard. Found by Aaron Jones. Fixes #482.
2682 * Fix runtime error in `mbedtls_platform_entropy_poll()` when run
2683 through qemu user emulation. Reported and fix suggested by randombit
2684 in #1212. Fixes #1212.
2685 * Fix an unsafe bounds check when restoring an SSL session from a ticket.
2686 This could lead to a buffer overflow, but only in case ticket authentication
2687 was broken. Reported and fix suggested by Guido Vranken in #659.
2688 * Add explicit integer to enumeration type casts to example program
2689 programs/pkey/gen_key which previously led to compilation failure
2690 on some toolchains. Reported by phoenixmcallister. Fixes #2170.
2691 * Fix double initialization of ECC hardware that made some accelerators
2692 hang.
2693 * Clarify documentation of mbedtls_ssl_set_own_cert() regarding the absence
Andrzej Kurek8764ccc2019-02-05 04:57:13 -05002694 of check for certificate/key matching. Reported by Attila Molnar, #507.
2695
2696 = mbed TLS 2.15.1 branch released 2018-11-30
2697
2698 Changes
2699 * Update the Mbed Crypto submodule to version 0.1.0b2.
2700
2701 = mbed TLS 2.15.0 branch released 2018-11-23
2702
2703 Features
2704 * Add an experimental build option, USE_CRYPTO_SUBMODULE, to enable use of
2705 Mbed Crypto as the source of the cryptography implementation.
2706 * Add an experimental configuration option, MBEDTLS_PSA_CRYPTO_C, to enable
2707 the PSA Crypto API from Mbed Crypto when additionally used with the
2708 USE_CRYPTO_SUBMODULE build option.
2709
2710 Changes
2711 * Add unit tests for AES-GCM when called through mbedtls_cipher_auth_xxx()
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002712 from the cipher abstraction layer. Fixes #2198.
2713
2714= mbed TLS 2.14.1 branch released 2018-11-30
2715
2716Security
2717 * Fix timing variations and memory access variations in RSA PKCS#1 v1.5
2718 decryption that could lead to a Bleichenbacher-style padding oracle
2719 attack. In TLS, this affects servers that accept ciphersuites based on
2720 RSA decryption (i.e. ciphersuites whose name contains RSA but not
2721 (EC)DH(E)). Discovered by Eyal Ronen (Weizmann Institute), Robert Gillham
2722 (University of Adelaide), Daniel Genkin (University of Michigan),
2723 Adi Shamir (Weizmann Institute), David Wong (NCC Group), and Yuval Yarom
2724 (University of Adelaide, Data61). The attack is described in more detail
2725 in the paper available here: http://cat.eyalro.net/cat.pdf CVE-2018-19608
2726 * In mbedtls_mpi_write_binary(), don't leak the exact size of the number
2727 via branching and memory access patterns. An attacker who could submit
2728 a plaintext for RSA PKCS#1 v1.5 decryption but only observe the timing
2729 of the decryption and not its result could nonetheless decrypt RSA
2730 plaintexts and forge RSA signatures. Other asymmetric algorithms may
2731 have been similarly vulnerable. Reported by Eyal Ronen, Robert Gillham,
2732 Daniel Genkin, Adi Shamir, David Wong and Yuval Yarom.
2733 * Wipe sensitive buffers on the stack in the CTR_DRBG and HMAC_DRBG
2734 modules.
2735
2736API Changes
2737 * The new functions mbedtls_ctr_drbg_update_ret() and
2738 mbedtls_hmac_drbg_update_ret() are similar to mbedtls_ctr_drbg_update()
2739 and mbedtls_hmac_drbg_update() respectively, but the new functions
Andrzej Kurekc470b6b2019-01-31 08:20:20 -05002740 report errors whereas the old functions return void. We recommend that
Simon Butcherc1b98922018-11-19 18:31:40 +00002741 applications use the new functions.
Manuel Pégourié-Gonnard171a4812017-05-15 17:23:37 +02002742
Hanno Beckerd3445da2018-11-02 09:36:45 +00002743= mbed TLS 2.14.0 branch released 2018-11-19
Simon Butcher681edee2018-11-07 16:25:38 +00002744
Simon Butcherb35e59d2018-11-19 15:49:26 +00002745Security
Simon Butcher681edee2018-11-07 16:25:38 +00002746 * Fix overly strict DN comparison when looking for CRLs belonging to a
2747 particular CA. This previously led to ignoring CRLs when the CRL's issuer
2748 name and the CA's subject name differed in their string encoding (e.g.,
2749 one using PrintableString and the other UTF8String) or in the choice of
Hanno Beckerdc71ef82018-10-08 13:51:38 +01002750 upper and lower case. Reported by Henrik Andersson of Bosch GmbH in issue
Simon Butcherb35e59d2018-11-19 15:49:26 +00002751 #1784.
Hanno Beckerdc71ef82018-10-08 13:51:38 +01002752 * Fix a flawed bounds check in server PSK hint parsing. In case the
Simon Butcherb35e59d2018-11-19 15:49:26 +00002753 incoming message buffer was placed within the first 64KiB of address
2754 space and a PSK-(EC)DHE ciphersuite was used, this allowed an attacker
Janos Follathe0e7ddf2018-09-06 10:40:04 +01002755 to trigger a memory access up to 64KiB beyond the incoming message buffer,
2756 potentially leading to an application crash or information disclosure.
2757 * Fix mbedtls_mpi_is_prime() to use more rounds of probabilistic testing. The
2758 previous settings for the number of rounds made it practical for an
Simon Butcher681edee2018-11-07 16:25:38 +00002759 adversary to construct non-primes that would be erroneously accepted as
2760 primes with high probability. This does not have an impact on the
Janos Follathe0e7ddf2018-09-06 10:40:04 +01002761 security of TLS, but can matter in other contexts with numbers chosen
2762 potentially by an adversary that should be prime and can be validated.
2763 For example, the number of rounds was enough to securely generate RSA key
2764 pairs or Diffie-Hellman parameters, but was insufficient to validate
2765 Diffie-Hellman parameters properly.
Hanno Beckerd3445da2018-11-02 09:36:45 +00002766 See "Prime and Prejudice" by by Martin R. Albrecht and Jake Massimo and
Manuel Pégourié-Gonnard171a4812017-05-15 17:23:37 +02002767 Kenneth G. Paterson and Juraj Somorovsky.
Manuel Pégourié-Gonnardf0bbd7e2018-10-15 13:22:41 +02002768
Simon Butcherb35e59d2018-11-19 15:49:26 +00002769Features
2770 * Add support for temporarily suspending expensive ECC computations after
2771 some configurable amount of operations. This is intended to be used in
2772 constrained, single-threaded systems where ECC is time consuming and can
2773 block other operations until they complete. This is disabled by default,
Manuel Pégourié-Gonnardf0bbd7e2018-10-15 13:22:41 +02002774 but can be enabled by MBEDTLS_ECP_RESTARTABLE at compile time and
2775 configured by mbedtls_ecp_set_max_ops() at runtime. It applies to the new
2776 xxx_restartable functions in ECP, ECDSA, PK and X.509 (CRL not supported
2777 yet), and to existing functions in ECDH and SSL (currently only
Simon Butcher4a865ef2018-10-28 18:00:51 +00002778 implemented client-side, for ECDHE-ECDSA ciphersuites in TLS 1.2,
2779 including client authentication).
2780 * Add support for Arm CPU DSP extensions to accelerate asymmetric key
2781 operations. On CPUs where the extensions are available, they can accelerate
Simon Butcherb35e59d2018-11-19 15:49:26 +00002782 MPI multiplications used in ECC and RSA cryptography. Contributed by
2783 Aurelien Jarno.
2784 * Extend RSASSA-PSS signature to allow a smaller salt size. Previously, PSS
2785 signature always used a salt with the same length as the hash, and returned
2786 an error if this was not possible. Now the salt size may be up to two bytes
Simon Butcher06d80cf2018-11-06 23:46:04 +00002787 shorter. This allows the library to support all hash and signature sizes
2788 that comply with FIPS 186-4, including SHA-512 with a 1024-bit key.
Manuel Pégourié-Gonnard823c9152018-07-02 12:05:49 +02002789 * Add support for 128-bit keys in CTR_DRBG. Note that using keys shorter
Simon Butchere51d4b32018-11-09 19:57:53 +00002790 than 256 bits limits the security of generated material to 128 bits.
Simon Butcher2ab14bb2018-11-09 20:09:33 +00002791
2792API Changes
2793 * Add a common error code of `MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED` for
2794 a feature that is not supported by underlying alternative
Simon Butchere51d4b32018-11-09 19:57:53 +00002795 implementations implementing cryptographic primitives. This is useful for
Ron Eldor6aa9fb42018-10-04 14:32:05 +03002796 hardware accelerators that don't implement all options or features.
Simon Butcher2ab14bb2018-11-09 20:09:33 +00002797
2798New deprecations
2799 * All module specific errors following the form
2800 MBEDTLS_ERR_XXX_FEATURE_UNAVAILABLE that indicate a feature is not
Simon Butcher681edee2018-11-07 16:25:38 +00002801 supported are deprecated and are now replaced by the new equivalent
Simon Butcher2ab14bb2018-11-09 20:09:33 +00002802 platform error.
2803 * All module specific generic hardware acceleration errors following the
Janos Follathe0e7ddf2018-09-06 10:40:04 +01002804 form MBEDTLS_ERR_XXX_HW_ACCEL_FAILED that are deprecated and are replaced
2805 by the equivalent plaform error.
2806 * Deprecate the function mbedtls_mpi_is_prime() in favor of
Ron Eldor6aa9fb42018-10-04 14:32:05 +03002807 mbedtls_mpi_is_prime_ext() which allows specifying the number of
Simon Butcherb3633822018-07-30 22:10:48 +01002808 Miller-Rabin rounds.
Simon Butcher2b5be1e2018-10-30 15:55:10 +00002809
2810Bugfix
2811 * Fix wrong order of freeing in programs/ssl/ssl_server2 example
2812 application leading to a memory leak in case both
Simon Butcherc86993e2018-09-27 09:48:54 +01002813 MBEDTLS_MEMORY_BUFFER_ALLOC_C and MBEDTLS_MEMORY_BACKTRACE are set.
2814 Fixes #2069.
Simon Butcher1afc7672018-09-27 11:35:19 +01002815 * Fix a bug in the update function for SSL ticket keys which previously
2816 invalidated keys of a lifetime of less than a 1s. Fixes #1968.
Hanno Beckerf24c3362018-10-17 14:53:05 +01002817 * Fix failure in hmac_drbg in the benchmark sample application, when
2818 MBEDTLS_THREADING_C is defined. Found by TrinityTonic, #1095
2819 * Fix a bug in the record decryption routine ssl_decrypt_buf()
Hanno Becker617a3212018-10-05 09:51:36 +01002820 which lead to accepting properly authenticated but improperly
2821 padded records in case of CBC ciphersuites using Encrypt-then-MAC.
Simon Butcher681edee2018-11-07 16:25:38 +00002822 * Fix memory leak and freeing without initialization in the example
2823 program programs/x509/cert_write. Fixes #1422.
Hanno Becker7e1f3be2018-10-15 13:20:28 +01002824 * Ignore IV in mbedtls_cipher_set_iv() when the cipher mode is
2825 MBEDTLS_MODE_ECB. Found by ezdevelop. Fixes #1091.
2826 * Zeroize memory used for buffering or reassembling handshake messages
2827 after use.
Hanno Beckerf143a782018-11-06 17:43:16 +00002828 * Use `mbedtls_platform_zeroize()` instead of `memset()` for zeroization
2829 of sensitive data in the example programs aescrypt2 and crypt_and_hash.
2830 * Change the default string format used for various X.509 DN attributes to
Simon Butcher681edee2018-11-07 16:25:38 +00002831 UTF8String. Previously, the use of the PrintableString format led to
2832 wildcards and non-ASCII characters being unusable in some DN attributes.
Hanno Beckere4f965d2018-10-11 10:54:45 +01002833 Reported by raprepo in #1860 and by kevinpt in #468. Fix contributed by
2834 Thomas-Dee.
2835 * Fix compilation failure for configurations which use compile time
2836 replacements of standard calloc/free functions through the macros
Simon Butcherc86993e2018-09-27 09:48:54 +01002837 MBEDTLS_PLATFORM_CALLOC_MACRO and MBEDTLS_PLATFORM_FREE_MACRO.
2838 Reported by ole-de and ddhome2006. Fixes #882, #1642 and #1706.
Simon Butcherc0514bf2018-09-26 18:07:18 +01002839
Simon Butcherc86993e2018-09-27 09:48:54 +01002840Changes
Gilles Peskine604ccc62018-07-10 15:55:52 +02002841 * Removed support for Yotta as a build tool.
2842 * Add tests for session resumption in DTLS.
2843 * Close a test gap in (D)TLS between the client side and the server side:
Simon Butcherddc9e262018-10-27 18:27:41 +01002844 test the handling of large packets and small packets on the client side
2845 in the same way as on the server side.
Simon Butcher404aa652018-10-01 14:44:22 +01002846 * Change the dtls_client and dtls_server samples to work by default over
2847 IPv6 and optionally by a build option over IPv4.
2848 * Change the use of Windows threading to use Microsoft Visual C++ runtime
Simon Butcher681edee2018-11-07 16:25:38 +00002849 calls, rather than Win32 API calls directly. This is necessary to avoid
2850 conflict with C runtime usage. Found and fixed by irwir.
2851 * Remember the string format of X.509 DN attributes when replicating
2852 X.509 DNs. Previously, DN attributes were always written in their default
2853 string format (mostly PrintableString), which could lead to CRTs being
2854 created which used PrintableStrings in the issuer field even though the
2855 signing CA used UTF8Strings in its subject field; while X.509 compliant,
2856 such CRTs were rejected in some applications, e.g. some versions of
Hanno Becker0bb204c2018-10-30 10:08:33 +00002857 Firefox, curl and GnuTLS. Reported in #1033 by Moschn. Fix contributed by
2858 Thomas-Dee.
Janos Follath33329372018-09-06 10:41:33 +01002859 * Improve documentation of mbedtls_ssl_get_verify_result().
2860 Fixes #517 reported by github-monoculture.
2861 * Add MBEDTLS_MPI_GEN_PRIME_FLAG_LOW_ERR flag to mbedtls_mpi_gen_prime() and
Simon Butcherc86993e2018-09-27 09:48:54 +01002862 use it to reduce error probability in RSA key generation to levels mandated
Simon Butcher5d40f672018-09-06 16:24:48 +01002863 by FIPS-186-4.
Simon Butcherb3633822018-07-30 22:10:48 +01002864
Andres Amaya Garciaa7b9f152018-08-16 21:46:35 +01002865= mbed TLS 2.13.1 branch released 2018-09-06
Hanno Beckeracef2922018-09-05 16:19:07 +01002866
Hanno Becker921b76d2018-09-05 16:21:36 +01002867API Changes
Andres Amaya Garciaa7b9f152018-08-16 21:46:35 +01002868 * Extend the platform module with an abstraction mbedtls_platform_gmtime_r()
Hanno Beckeracef2922018-09-05 16:19:07 +01002869 whose implementation should behave as a thread-safe version of gmtime().
2870 This allows users to configure such an implementation at compile time when
2871 the target system cannot be deduced automatically, by setting the option
Andres Amaya Garciaa7b9f152018-08-16 21:46:35 +01002872 MBEDTLS_PLATFORM_GMTIME_R_ALT. At this stage Mbed TLS is only able to
Simon Butcherb3633822018-07-30 22:10:48 +01002873 automatically select implementations for Windows and POSIX C libraries.
Andres Amaya Garcia8c9a6202018-09-05 11:30:28 +01002874
2875Bugfix
Simon Butcherb3633822018-07-30 22:10:48 +01002876 * Fix build failures on platforms where only gmtime() is available but
Simon Butcher4d075cd2018-08-31 15:59:10 +01002877 neither gmtime_r() nor gmtime_s() are present. Fixes #1907.
Gilles Peskine5bdb6712018-03-22 21:34:15 +01002878
k-stachowiak21feae52018-07-09 14:42:35 +02002879= mbed TLS 2.13.0 branch released 2018-08-31
k-stachowiak6ca436a2018-07-16 12:20:10 +02002880
2881Security
2882 * Fix an issue in the X.509 module which could lead to a buffer overread
2883 during certificate extensions parsing. In case of receiving malformed
k-stachowiak21feae52018-07-09 14:42:35 +02002884 input (extensions length field equal to 0), an illegal read of one byte
Manuel Pégourié-Gonnard01ec4af2017-09-21 13:16:52 +02002885 beyond the input buffer is made. Found and analyzed by Nathan Crandall.
Manuel Pégourié-Gonnard6e7aaca2018-08-20 10:37:23 +02002886
2887Features
Manuel Pégourié-Gonnardf2f1d402018-08-21 09:53:22 +02002888 * Add support for fragmentation of outgoing DTLS handshake messages. This
Manuel Pégourié-Gonnard6e7aaca2018-08-20 10:37:23 +02002889 is controlled by the maximum fragment length as set locally or negotiated
Manuel Pégourié-Gonnardb8eec192018-08-20 09:34:02 +02002890 with the peer, as well as by a new per-connection MTU option, set using
2891 mbedtls_ssl_set_mtu().
2892 * Add support for auto-adjustment of MTU to a safe value during the
Hanno Beckerd87a59c2018-08-14 16:34:55 +01002893 handshake when flights do not get through (RFC 6347, section 4.1.1.1,
2894 last paragraph).
Hanno Becker02f6f5a2018-08-28 12:54:27 +01002895 * Add support for packing multiple records within a single datagram,
Hanno Beckeraa249372018-08-22 10:27:13 +01002896 enabled by default.
2897 * Add support for buffering out-of-order handshake messages in DTLS.
2898 The maximum amount of RAM used for this can be controlled by the
Hanno Beckerd87a59c2018-08-14 16:34:55 +01002899 compile-time constant MBEDTLS_SSL_DTLS_MAX_BUFFERING defined
2900 in mbedtls/config.h.
Hanno Becker1841b0a2018-08-24 11:13:57 +01002901
Hanno Beckerd87a59c2018-08-14 16:34:55 +01002902API Changes
Manuel Pégourié-Gonnard01ec4af2017-09-21 13:16:52 +02002903 * Add function mbedtls_ssl_set_datagram_packing() to configure
Gilles Peskine104d8582018-06-27 10:57:33 +02002904 the use of datagram packing (enabled by default).
Simon Butcherb5afb972018-08-31 11:59:56 +01002905
2906Bugfix
Gilles Peskine104d8582018-06-27 10:57:33 +02002907 * Fix a potential memory leak in mbedtls_ssl_setup() function. An allocation
2908 failure in the function could lead to other buffers being leaked.
Jaeden Amerof48163a2018-08-10 10:49:10 +01002909 * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if
2910 MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890
Ron Eldor3f38cf72018-06-21 16:40:24 +03002911 * Fix a memory leak in ecp_mul_comb() if ecp_precompute_comb() fails.
Ron Eldor84e62f82018-06-28 11:09:09 +03002912 Fix contributed by Espressif Systems.
2913 * Add ecc extensions only if an ecc based ciphersuite is used.
Simon Butcherb5afb972018-08-31 11:59:56 +01002914 This improves compliance to RFC 4492, and as a result, solves
2915 interoperability issues with BouncyCastle. Raised by milenamil in #1157.
Hanno Becker9dc3be72018-08-14 15:22:05 +01002916 * Replace printf with mbedtls_printf in the ARIA module. Found by
Hanno Becker361f2542018-08-13 16:36:58 +01002917 TrinityTonic in #1908.
Hanno Beckereb2b15a2018-08-17 09:47:22 +01002918 * Fix potential use-after-free in mbedtls_ssl_get_max_frag_len()
2919 and mbedtls_ssl_get_record_expansion() after a session reset. Fixes #1941.
2920 * Fix a bug that caused SSL/TLS clients to incorrectly abort the handshake
2921 with TLS versions 1.1 and earlier when the server requested authentication
2922 without providing a list of CAs. This was due to an overly strict bounds
Hanno Becker44814642018-08-03 09:53:48 +01002923 check in parsing the CertificateRequest message,
2924 introduced in Mbed TLS 2.12.0. Fixes #1954.
2925 * Fix a miscalculation of the maximum record expansion in
Simon Butcherb5afb972018-08-31 11:59:56 +01002926 mbedtls_ssl_get_record_expansion() in case of ChachaPoly ciphersuites,
2927 or CBC ciphersuites in (D)TLS versions 1.1 or higher. Fixes #1913, #1914.
Hanno Beckera70fb952017-10-08 16:13:03 +01002928 * Fix undefined shifts with negative values in certificates parsing
2929 (found by Catena cyber using oss-fuzz)
Simon Butcherb5afb972018-08-31 11:59:56 +01002930 * Fix memory leak and free without initialization in pk_encrypt
Gilles Peskine104d8582018-06-27 10:57:33 +02002931 and pk_decrypt example programs. Reported by Brace Stout. Fixes #1128.
Jaeden Amero372b50b2018-08-10 10:56:31 +01002932 * Remove redundant else statement. Raised by irwir. Fixes #1776.
2933
2934Changes
Jaeden Amero03bd4842018-08-10 11:17:14 +01002935 * Copy headers preserving timestamps when doing a "make install".
2936 Contributed by xueruini.
Jaeden Amerod8f416982018-08-10 11:23:15 +01002937 * Allow the forward declaration of public structs. Contributed by Dawid
2938 Drozd. Fixes #1215 raised by randombit.
Hanno Beckerf1035422018-08-16 16:07:27 +01002939 * Improve compatibility with some alternative CCM implementations by using
Janos Follath08a4aeb2018-08-06 14:20:15 +01002940 CCM test vectors from RAM.
2941 * Add support for buffering of out-of-order handshake messages.
2942 * Add warnings to the documentation of the HKDF module to reduce the risk
2943 of misusing the mbedtls_hkdf_extract() and mbedtls_hkdf_expand()
Gilles Peskine5bdb6712018-03-22 21:34:15 +01002944 functions. Fixes #1775. Reported by Brian J. Murray.
2945
Gilles Peskine104d8582018-06-27 10:57:33 +02002946= mbed TLS 2.12.0 branch released 2018-07-25
2947
2948Security
2949 * Fix a vulnerability in TLS ciphersuites based on CBC and using SHA-384,
2950 in (D)TLS 1.0 to 1.2, that allowed an active network attacker to
2951 partially recover the plaintext of messages under some conditions by
2952 exploiting timing measurements. With DTLS, the attacker could perform
2953 this recovery by sending many messages in the same connection. With TLS
2954 or if mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only
2955 worked if the same secret (for example a HTTP Cookie) has been repeatedly
2956 sent over connections manipulated by the attacker. Connections using GCM
2957 or CCM instead of CBC, using hash sizes other than SHA-384, or using
2958 Encrypt-then-Mac (RFC 7366) were not affected. The vulnerability was
2959 caused by a miscalculation (for SHA-384) in a countermeasure to the
Manuel Pégourié-Gonnard1cc1fb02018-06-28 12:10:27 +02002960 original Lucky 13 attack. Found by Kenny Paterson, Eyal Ronen and Adi
2961 Shamir.
2962 * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to
Manuel Pégourié-Gonnard830ce112018-07-11 18:27:08 +02002963 1.2, that allowed a local attacker, able to execute code on the local
Antonin Décimo36e89b52019-01-23 15:24:37 +01002964 machine as well as manipulate network packets, to partially recover the
Manuel Pégourié-Gonnard830ce112018-07-11 18:27:08 +02002965 plaintext of messages under some conditions by using a cache attack
2966 targeting an internal MD/SHA buffer. With TLS or if
2967 mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if
2968 the same secret (for example a HTTP Cookie) has been repeatedly sent over
2969 connections manipulated by the attacker. Connections using GCM or CCM
Manuel Pégourié-Gonnard7b420302018-06-28 10:38:35 +02002970 instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected.
2971 Found by Kenny Paterson, Eyal Ronen and Adi Shamir.
2972 * Add a counter-measure against a vulnerability in TLS ciphersuites based
2973 on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to
2974 execute code on the local machine as well as manipulate network packets,
2975 to partially recover the plaintext of messages under some conditions (see
2976 previous entry) by using a cache attack targeting the SSL input record
2977 buffer. Connections using GCM or CCM instead of CBC or using
Gilles Peskine104d8582018-06-27 10:57:33 +02002978 Encrypt-then-Mac (RFC 7366) were not affected. Found by Kenny Paterson,
Manuel Pégourié-Gonnardce8314f2018-05-03 12:49:58 +02002979 Eyal Ronen and Adi Shamir.
2980
Manuel Pégourié-Gonnard1f092b42018-06-19 12:48:24 +02002981Features
Simon Butcherf11a7cd2018-07-25 17:26:56 +01002982 * Add new crypto primitives from RFC 7539: stream cipher Chacha20, one-time
Manuel Pégourié-Gonnard1f092b42018-06-19 12:48:24 +02002983 authenticator Poly1305 and AEAD construct Chacha20-Poly1305. Contributed
Simon Butcher231d7e52018-07-10 11:56:19 +01002984 by Daniel King.
2985 * Add support for CHACHA20-POLY1305 ciphersuites from RFC 7905.
Simon Butcher00af4472018-07-10 15:35:43 +01002986 * Add platform support for the Haiku OS. (https://www.haiku-os.org).
2987 Contributed by Augustin Cavalier.
2988 * Make the receive and transmit buffers independent sizes, for situations
2989 where the outgoing buffer can be fixed at a smaller size than the incoming
2990 buffer, which can save some RAM. If buffer lengths are kept equal, there
Ron Eldor9cf0d532018-07-15 09:34:35 +03002991 is no functional difference. Contributed by Angus Gratton, and also
Simon Butcherf11a7cd2018-07-25 17:26:56 +01002992 independently contributed again by Paul Sokolovsky.
Manuel Pégourié-Gonnardce8314f2018-05-03 12:49:58 +02002993 * Add support for key wrapping modes based on AES as defined by
Simon Butcher9e02b972018-06-28 11:56:57 +01002994 NIST SP 800-38F algorithms KW and KWP and by RFC 3394 and RFC 5649.
2995
2996Bugfix
niisatob7d39db2018-06-25 20:44:57 +09002997 * Fix the key_app_writer example which was writing a leading zero byte which
niisato164b9cd2018-06-25 20:47:05 +09002998 was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257.
Simon Butcher1d97cab2018-06-28 12:06:16 +01002999 * Fix compilation error on C++, because of a variable named new.
Simon Butcherf11a7cd2018-07-25 17:26:56 +01003000 Found and fixed by Hirotaka Niisato in #1783.
Andres Amaya Garciaa562c262017-07-11 14:39:30 +01003001 * Fix "no symbols" warning issued by ranlib when building on Mac OS X. Fix
3002 contributed by tabascoeye.
Simon Butcher1ab9b572018-06-28 12:10:56 +01003003 * Clarify documentation for mbedtls_ssl_write() to include 0 as a valid
3004 return value. Found by @davidwu2000. #839
Simon Butcher05fa46e2018-07-02 12:00:54 +01003005 * Fix a memory leak in mbedtls_x509_csr_parse(), found by catenacyber,
3006 Philippe Antoine. Fixes #1623.
Ron Eldorda2a3122018-06-17 14:51:59 +03003007 * Remove unused headers included in x509.c. Found by Chris Hanson and fixed
3008 by Brendan Shanks. Part of a fix for #992.
Simon Butcherf11a7cd2018-07-25 17:26:56 +01003009 * Fix compilation error when MBEDTLS_ARC4_C is disabled and
3010 MBEDTLS_CIPHER_NULL_CIPHER is enabled. Found by TrinityTonic in #1719.
Simon Butcher6c344422018-06-24 16:20:56 +01003011 * Added length checks to some TLS parsing functions. Found and fixed by
3012 Philippe Antoine from Catena cyber. #1663.
Ron Eldor6332e362017-10-01 17:11:54 +03003013 * Fix the inline assembly for the MPI multiply helper function for i386 and
Ron Eldor6fd941f2017-05-14 16:17:33 +03003014 i386 with SSE2. Found by László Langó. Fixes #1550
Simon Butcherecb635e2018-07-24 10:03:41 +01003015 * Fix namespacing in header files. Remove the `mbedtls` namespacing in
3016 the `#include` in the header files. Resolves #857
3017 * Fix compiler warning of 'use before initialisation' in
Simon Butcher05330542018-07-24 12:54:15 +01003018 mbedtls_pk_parse_key(). Found by Martin Boye Petersen and fixed by Dawid
3019 Drozd. #1098
3020 * Fix decryption for zero length messages (which contain all padding) when a
3021 CBC based ciphersuite is used together with Encrypt-then-MAC. Previously,
3022 such a message was wrongly reported as an invalid record and therefore lead
3023 to the connection being terminated. Seen most often with OpenSSL using
Andres Amaya Garcia81f06332018-07-04 10:01:39 +01003024 TLS 1.0. Reported by @kFYatek and by Conor Murphy on the forum. Fix
3025 contributed by Espressif Systems. Fixes #1632
3026 * Fix ssl_client2 example to send application data with 0-length content
Simon Butcherf11a7cd2018-07-25 17:26:56 +01003027 when the request_size argument is set to 0 as stated in the documentation.
3028 Fixes #1833.
Simon Butcher2c929492018-07-24 17:20:17 +01003029 * Correct the documentation for `mbedtls_ssl_get_session()`. This API has
Simon Butcher9e02b972018-06-28 11:56:57 +01003030 deep copy of the session, and the peer certificate is not lost. Fixes #926.
Simon Butcher9fa21bf2018-06-27 10:50:58 +01003031 * Fix build using -std=c99. Fixed by Nick Wilson.
Simon Butcherf11a7cd2018-07-25 17:26:56 +01003032
3033Changes
3034 * Fail when receiving a TLS alert message with an invalid length, or invalid
3035 zero-length messages when using TLS 1.2. Contributed by Espressif Systems.
3036 * Change the default behaviour of mbedtls_hkdf_extract() to return an error
Simon Butcher9fa21bf2018-06-27 10:50:58 +01003037 when calling with a NULL salt and non-zero salt_len. Contributed by
3038 Brian J Murray
Nicholas Wilson512b4ee2017-12-05 12:07:33 +00003039 * Change the shebang line in Perl scripts to look up perl in the PATH.
3040 Contributed by fbrosson.
3041 * Allow overriding the time on Windows via the platform-time abstraction.
Simon Butcher9fa21bf2018-06-27 10:50:58 +01003042 Fixed by Nick Wilson.
Manuel Pégourié-Gonnard823c9152018-07-02 12:05:49 +02003043 * Use gmtime_r/gmtime_s for thread-safety. Fixed by Nick Wilson.
3044
3045= mbed TLS 2.11.0 branch released 2018-06-18
Simon Butcher4ed38802018-06-12 17:35:06 +01003046
3047Features
3048 * Add additional block mode, OFB (Output Feedback), to the AES module and
3049 cipher abstraction module.
3050 * Implement the HMAC-based extract-and-expand key derivation function
Jaeden Amerof4474e72018-05-23 14:21:02 +01003051 (HKDF) per RFC 5869. Contributed by Thomas Fossati.
3052 * Add support for the CCM* block cipher mode as defined in IEEE Std. 802.15.4.
Gilles Peskineb44692f2018-04-24 12:18:19 +02003053 * Add support for the XTS block cipher mode with AES (AES-XTS).
3054 Contributed by Aorimn in pull request #414.
3055 * In TLS servers, support offloading private key operations to an external
Simon Butcherebe23ed2018-06-12 16:46:45 +01003056 cryptoprocessor. Private key operations can be asynchronous to allow
Simon Butcher601144e2018-06-12 17:04:58 +01003057 non-blocking operation of the TLS server stack.
Simon Butcher4ed38802018-06-12 17:35:06 +01003058
3059Bugfix
Simon Butchere5cd8682018-06-14 10:30:19 +01003060 * Fix the cert_write example to handle certificates signed with elliptic
3061 curves as well as RSA. Fixes #777 found by dbedev.
Simon Butcher600c5e62018-06-14 08:58:59 +01003062 * Fix for redefinition of _WIN32_WINNT to avoid overriding a definition
3063 used by user applications. Found and fixed by Fabio Alessandrelli.
Simon Butcher925568a2018-06-18 11:54:44 +01003064 * Fix compilation warnings with IAR toolchain, on 32 bit platform.
Simon Butcher4ed38802018-06-12 17:35:06 +01003065 Reported by rahmanih in #683
3066 * Fix braces in mbedtls_memory_buffer_alloc_status(). Found by sbranden, #552.
3067
Simon Butcherb6a5bff2018-06-18 11:51:36 +01003068Changes
3069 * Changed CMake defaults for IAR to treat all compiler warnings as errors.
3070 * Changed the Clang parameters used in the CMake build files to work for
Manuel Pégourié-Gonnard171a4812017-05-15 17:23:37 +02003071 versions later than 3.6. Versions of Clang earlier than this may no longer
Simon Butcherd5a09f12018-06-06 14:47:47 +01003072 work. Fixes #1072
Gilles Peskine5bdb6712018-03-22 21:34:15 +01003073
Manuel Pégourié-Gonnard08d1e912018-02-27 12:43:35 +01003074= mbed TLS 2.10.0 branch released 2018-06-06
3075
3076Features
3077 * Add support for ARIA cipher (RFC 5794) and associated TLS ciphersuites
Gilles Peskine80aa3b82018-04-04 10:33:45 +02003078 (RFC 6209). Disabled by default, see MBEDTLS_ARIA_C in config.h
Andres Amaya Garcia19624052018-03-08 20:06:03 +00003079
3080API Changes
3081 * Extend the platform module with a util component that contains
3082 functionality shared by multiple Mbed TLS modules. At this stage
3083 platform_util.h (and its associated platform_util.c) only contain
3084 mbedtls_platform_zeroize(), which is a critical function from a security
3085 point of view. mbedtls_platform_zeroize() needs to be regularly tested
3086 against compilers to ensure that calls to it are not removed from the
3087 output binary as part of redundant code elimination optimizations.
Hanno Becker2bd57572018-03-28 14:52:35 +01003088 Therefore, mbedtls_platform_zeroize() is moved to the platform module to
Simon Butcherd72700a2018-06-01 19:11:55 +01003089 facilitate testing and maintenance.
3090
3091Bugfix
3092 * Fix an issue with MicroBlaze support in bn_mul.h which was causing the
Gilles Peskineb2f09c32018-03-21 12:38:00 +01003093 build to fail. Found by zv-io. Fixes #1651.
3094
Moran Pekera64fba42018-02-25 13:29:03 +02003095Changes
3096 * Support TLS testing in out-of-source builds using cmake. Fixes #1193.
Gilles Peskineb2f09c32018-03-21 12:38:00 +01003097 * Fix redundant declaration of mbedtls_ssl_list_ciphersuites. Raised by
Jaeden Amero7d7bad62018-04-27 13:07:13 +01003098 TrinityTonic. #1359.
Ron Eldorfb46c322016-12-16 16:15:56 +02003099
Simon Butcherf85c90a2017-07-27 15:11:52 +01003100= mbed TLS 2.9.0 branch released 2018-04-30
Simon Butcherb03120a2018-04-30 16:40:25 +01003101
3102Security
3103 * Fix an issue in the X.509 module which could lead to a buffer overread
3104 during certificate validation. Additionally, the issue could also lead to
3105 unnecessary callback checks being made or to some validation checks to be
3106 omitted. The overread could be triggered remotely, while the other issues
3107 would require a non DER-compliant certificate to be correctly signed by a
3108 trusted CA, or a trusted CA with a non DER-compliant certificate. Found by
3109 luocm. Fixes #825.
3110 * Fix the buffer length assertion in the ssl_parse_certificate_request()
3111 function which led to an arbitrary overread of the message buffer. The
3112 overreads could be caused by receiving a malformed message at the point
3113 where an optional signature algorithms list is expected when the signature
Andrzej Kurekb7a18c02018-04-25 05:25:30 -04003114 algorithms section is too short. In builds with debug output, the overread
Simon Butcherb03120a2018-04-30 16:40:25 +01003115 data is output with the debug data.
3116 * Fix a client-side bug in the validation of the server's ciphersuite choice
3117 which could potentially lead to the client accepting a ciphersuite it didn't
3118 offer or a ciphersuite that cannot be used with the TLS or DTLS version
Gilles Peskine5bdb6712018-03-22 21:34:15 +01003119 chosen by the server. This could lead to corruption of internal data
Gilles Peskine15ad5792018-03-22 22:21:55 +01003120 structures for some configurations.
Simon Butcherb03120a2018-04-30 16:40:25 +01003121
3122Features
3123 * Add an option, MBEDTLS_AES_FEWER_TABLES, to dynamically compute smaller AES
Gilles Peskine15ad5792018-03-22 22:21:55 +01003124 tables during runtime, thereby reducing the RAM/ROM footprint by ~6KiB.
3125 Suggested and contributed by jkivilin in pull request #394.
3126 * Add initial support for Curve448 (RFC 7748). Only mbedtls_ecp_mul() and
Simon Butchere6a2a1a2018-05-01 13:57:53 +01003127 ECDH primitive functions (mbedtls_ecdh_gen_public(),
Hanno Becker371f31c2017-06-07 15:56:54 +01003128 mbedtls_ecdh_compute_shared()) are supported for now. Contributed by
3129 Nicholas Wilson in pull request #348.
Simon Butcherb03120a2018-04-30 16:40:25 +01003130
3131API Changes
3132 * Extend the public API with the function of mbedtls_net_poll() to allow user
3133 applications to wait for a network context to become ready before reading
3134 or writing.
3135 * Add function mbedtls_ssl_check_pending() to the public API to allow
Gilles Peskine557e77d2018-04-04 09:18:11 +02003136 a check for whether more more data is pending to be processed in the
3137 internal message buffers.
Hanno Becker371f31c2017-06-07 15:56:54 +01003138 This function is necessary to determine when it is safe to idle on the
Andres AGee7157e2016-12-07 10:25:19 +00003139 underlying transport in case event-driven IO is used.
Simon Butcherb03120a2018-04-30 16:40:25 +01003140
Gilles Peskine08185402018-03-22 21:50:48 +01003141Bugfix
Gilles Peskine51d93942018-03-23 01:42:44 +01003142 * Fix a spurious uninitialized variable warning in cmac.c. Fix independently
3143 contributed by Brian J Murray and David Brown.
3144 * Add missing dependencies in test suites that led to build failures
Jaeden Amerob6049602018-03-26 18:25:58 +01003145 in configurations that omit certain hashes or public-key algorithms.
3146 Fixes #1040.
Gilles Peskinef69ad5a2018-03-27 23:08:53 +02003147 * Fix C89 incompatibility in benchmark.c. Contributed by Brendan Shanks.
Simon Butcherb03120a2018-04-30 16:40:25 +01003148 #1353
3149 * Add missing dependencies for MBEDTLS_HAVE_TIME_DATE and
3150 MBEDTLS_VERSION_FEATURES in some test suites. Contributed by
3151 Deomid Ryabkov. Fixes #1299, #1475.
Jethro Beekmand2df9362018-02-16 13:11:04 -08003152 * Fix the Makefile build process for building shared libraries on Mac OS X.
Simon Butcherb03120a2018-04-30 16:40:25 +01003153 Fixed by mnacamura.
Jethro Beekmancb122372018-04-11 08:40:38 -07003154 * Fix parsing of PKCS#8 encoded Elliptic Curve keys. Previously Mbed TLS was
Simon Butcherb03120a2018-04-30 16:40:25 +01003155 unable to parse keys which had only the optional parameters field of the
3156 ECPrivateKey structure. Found by Jethro Beekman, fixed in #1379.
3157 * Return the plaintext data more quickly on unpadded CBC decryption, as
Gilles Peskineb9e86962018-04-04 09:20:59 +02003158 stated in the mbedtls_cipher_update() documentation. Contributed by
3159 Andy Leiserson.
Hanno Beckerc53826b2017-10-12 07:46:41 +01003160 * Fix overriding and ignoring return values when parsing and writing to
3161 a file in pk_sign program. Found by kevlut in #1142.
3162 * Restrict usage of error code MBEDTLS_ERR_SSL_WANT_READ to situations
3163 where data needs to be fetched from the underlying transport in order
3164 to make progress. Previously, this error code was also occasionally
Simon Butcherb03120a2018-04-30 16:40:25 +01003165 returned when unexpected messages were being discarded, ignoring that
3166 further messages could potentially already be pending to be processed
Gilles Peskinef2b76cd2018-04-19 17:41:39 +02003167 in the internal buffers; these cases led to deadlocks when event-driven
3168 I/O was used. Found and reported by Hubert Mis in #772.
3169 * Fix buffer length assertions in the ssl_parse_certificate_request()
Andrzej Kurek5462e022018-04-20 07:58:53 -04003170 function which leads to a potential one byte overread of the message
3171 buffer.
Simon Butchere6a2a1a2018-05-01 13:57:53 +01003172 * Fix invalid buffer sizes passed to zlib during record compression and
3173 decompression.
3174 * Fix the soversion of libmbedcrypto to match the soversion of the
3175 maintained 2.7 branch. The soversion was increased in Mbed TLS
Gilles Peskine08185402018-03-22 21:50:48 +01003176 version 2.7.1 to reflect breaking changes in that release, but the
Gilles Peskine5bdb6712018-03-22 21:34:15 +01003177 increment was missed in 2.8.0 and later releases outside of the 2.7 branch.
3178
Simon Butcherb03120a2018-04-30 16:40:25 +01003179Changes
3180 * Remove some redundant code in bignum.c. Contributed by Alexey Skalozub.
Gilles Peskine51d93942018-03-23 01:42:44 +01003181 * Support cmake builds where Mbed TLS is a subproject. Fix contributed
3182 independently by Matthieu Volat and Arne Schwabe.
3183 * Improve testing in configurations that omit certain hashes or
Andres Amaya Garcia768bbaf2018-03-21 15:05:12 +00003184 public-key algorithms. Includes contributions by Gert van Dijk.
3185 * Improve negative testing of X.509 parsing.
3186 * Do not define global mutexes around readdir() and gmtime() in
Simon Butcherb03120a2018-04-30 16:40:25 +01003187 configurations where the feature is disabled. Found and fixed by Gergely
3188 Budai.
3189 * Harden the function mbedtls_ssl_config_free() against misuse, so that it
3190 doesn't leak memory if the user doesn't use mbedtls_ssl_conf_psk() and
Andres Amaya Garciacb47a792018-03-27 21:19:50 +01003191 instead incorrectly manipulates the configuration structure directly.
3192 Found and fix submitted by junyeonLEE in #1220.
3193 * Provide an empty implementation of mbedtls_pkcs5_pbes2() when
Manuel Pégourié-Gonnardfff308e2018-03-28 11:13:05 +02003194 MBEDTLS_ASN1_PARSE_C is not enabled. This allows the use of PBKDF2
3195 without PBES2. Fixed by Marcos Del Sol Vives.
3196 * Add the order of the base point as N in the mbedtls_ecp_group structure
Jaeden Amero4ba87fc2018-03-29 11:01:38 +01003197 for Curve25519 (other curves had it already). Contributed by Nicholas
3198 Wilson #481
Darryl Greeneea1c4e2018-03-29 16:05:44 +01003199 * Improve the documentation of mbedtls_net_accept(). Contributed by Ivan
3200 Krylov.
Simon Butcherb03120a2018-04-30 16:40:25 +01003201 * Improve the documentation of mbedtls_ssl_write(). Suggested by
Andres Amaya Garciad1b17882018-03-27 19:14:24 +01003202 Paul Sokolovsky in #1356.
3203 * Add an option in the Makefile to support ar utilities where the operation
Andres Amaya Garciaea5a8a42018-03-25 23:57:09 +01003204 letter must not be prefixed by '-', such as LLVM. Found and fixed by
Andres Amaya Garciad1b17882018-03-27 19:14:24 +01003205 Alex Hixon.
Gilles Peskine4e4be7c2018-03-21 16:29:03 +01003206 * Allow configuring the shared library extension by setting the DLEXT
Gilles Peskine092bf3d2018-04-01 12:43:48 +02003207 environment variable when using the project makefiles.
Gilles Peskinea09453f2018-04-04 09:14:12 +02003208 * Optimize unnecessary zeroing in mbedtls_mpi_copy. Based on a contribution
3209 by Alexey Skalozub in #405.
3210 * In the SSL module, when f_send, f_recv or f_recv_timeout report
Gilles Peskinec96ccf42018-03-31 22:57:03 +02003211 transmitting more than the required length, return an error. Raised by
3212 Sam O'Connor in #1245.
3213 * Improve robustness of mbedtls_ssl_derive_keys against the use of
Simon Butcherb03120a2018-04-30 16:40:25 +01003214 HMAC functions with non-HMAC ciphersuites. Independently contributed
3215 by Jiayuan Chen in #1377. Fixes #1437.
Gilles Peskine81021ca2018-04-19 20:59:06 +02003216 * Improve security of RSA key generation by including criteria from
3217 FIPS 186-4. Contributed by Jethro Beekman. #1380
3218 * Declare functions in header files even when an alternative implementation
3219 of the corresponding module is activated by defining the corresponding
3220 MBEDTLS_XXX_ALT macro. This means that alternative implementations do
Andrzej Kurekaca09c72018-04-13 05:18:08 -04003221 not need to copy the declarations, and ensures that they will have the
Gilles Peskine5bdb6712018-03-22 21:34:15 +01003222 same API.
Jaeden Amero8be0e6d2018-03-16 16:25:12 +00003223 * Add platform setup and teardown calls in test suites.
Gilles Peskine27b07542018-02-14 14:07:48 +01003224
Gilles Peskine04f9bd02018-02-22 15:22:44 +01003225= mbed TLS 2.8.0 branch released 2018-03-16
3226
Thomas Daubneyd596e992021-06-18 11:50:56 +01003227Default behavior changes
3228 * The truncated HMAC extension now conforms to RFC 6066. This means
3229 that when both sides of a TLS connection negotiate the truncated
3230 HMAC extension, Mbed TLS can now interoperate with other
3231 compliant implementations, but this breaks interoperability with
3232 prior versions of Mbed TLS. To restore the old behavior, enable
3233 the (deprecated) option MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT in
3234 config.h. Found by Andreas Walz (ivESK, Offenburg University of
3235 Applied Sciences).
3236
Hanno Becker7dc832b2017-11-16 17:39:34 +00003237Security
Gilles Peskine04f9bd02018-02-22 15:22:44 +01003238 * Fix implementation of the truncated HMAC extension. The previous
3239 implementation allowed an offline 2^80 brute force attack on the
3240 HMAC key of a single, uninterrupted connection (with no
3241 resumption of the session).
Gilles Peskine553a06f2018-03-13 17:15:34 +01003242 * Verify results of RSA private key operations to defend
3243 against Bellcore glitch attack.
Krzysztof Stachowiak00bbf572018-03-14 11:14:13 +01003244 * Fix a buffer overread in ssl_parse_server_key_exchange() that could cause
3245 a crash on invalid input.
Krzysztof Stachowiak7fa1ae72018-03-13 17:17:38 +01003246 * Fix a buffer overread in ssl_parse_server_psk_hint() that could cause a
3247 crash on invalid input.
Manuel Pégourié-Gonnardfd3e4fb2018-03-13 11:53:30 +01003248 * Fix CRL parsing to reject CRLs containing unsupported critical
3249 extensions. Found by Falko Strenzke and Evangelos Karatsiolis.
Hanno Becker7dc832b2017-11-16 17:39:34 +00003250
Antonio Quartulli12ccef22017-12-20 07:03:55 +08003251Features
3252 * Extend PKCS#8 interface by introducing support for the entire SHA
3253 algorithms family when encrypting private keys using PKCS#5 v2.0.
Gilles Peskine1d80a672018-02-14 11:33:30 +01003254 This allows reading encrypted PEM files produced by software that
3255 uses PBKDF2-SHA2, such as OpenSSL 1.1. Submitted by Antonio Quartulli,
3256 OpenVPN Inc. Fixes #1339
Gilles Peskine3dabd6a2018-02-14 17:19:41 +01003257 * Add support for public keys encoded in PKCS#1 format. #1122
Antonio Quartulli12ccef22017-12-20 07:03:55 +08003258
Hanno Beckercf092b22018-03-06 14:23:38 +00003259New deprecations
3260 * Deprecate support for record compression (configuration option
3261 MBEDTLS_ZLIB_SUPPORT).
3262
Gilles Peskine27b07542018-02-14 14:07:48 +01003263Bugfix
3264 * Fix the name of a DHE parameter that was accidentally changed in 2.7.0.
3265 Fixes #1358.
Gilles Peskine1e3fd692018-02-14 15:12:49 +01003266 * Fix test_suite_pk to work on 64-bit ILP32 systems. #849
Ron Eldor099e61d2018-02-06 17:34:27 +02003267 * Fix mbedtls_x509_crt_profile_suiteb, which used to reject all certificates
3268 with flag MBEDTLS_X509_BADCERT_BAD_PK even when the key type was correct.
Gilles Peskine1bf61232018-02-27 08:37:52 +01003269 In the context of SSL, this resulted in handshake failure. Reported by
3270 daniel in the Mbed TLS forum. #1351
Jaeden Ameroc5d08f82018-02-21 13:32:39 +00003271 * Fix Windows x64 builds with the included mbedTLS.sln file. #1347
Gilles Peskineb4c571e2018-03-11 00:44:14 +01003272 * Fix setting version TLSv1 as minimal version, even if TLS 1
3273 is not enabled. Set MBEDTLS_SSL_MIN_MAJOR_VERSION
3274 and MBEDTLS_SSL_MIN_MINOR_VERSION instead of
3275 MBEDTLS_SSL_MAJOR_VERSION_3 and MBEDTLS_SSL_MINOR_VERSION_1. #664
Ron Eldor2f73c932017-09-26 15:06:56 +03003276 * Fix compilation error on Mingw32 when _TRUNCATE is defined. Use _TRUNCATE
3277 only if __MINGW32__ not defined. Fix suggested by Thomas Glanzmann and
Ron Eldorbc18eb32017-09-06 17:49:10 +03003278 Nick Wilson on issue #355
Gilles Peskine08af5382018-03-11 00:15:56 +01003279 * In test_suite_pk, pass valid parameters when testing for hash length
itayzafrir693a1d92018-02-26 12:02:10 +02003280 overflow. #1179
Gilles Peskinea31d8202018-03-12 23:45:08 +01003281 * Fix memory allocation corner cases in memory_buffer_alloc.c module. Found
3282 by Guido Vranken. #639
Gilles Peskine3ff4a072018-03-12 23:54:20 +01003283 * Log correct number of ciphersuites used in Client Hello message. #918
Gilles Peskine5f193282018-03-13 17:18:06 +01003284 * Fix X509 CRT parsing that would potentially accept an invalid tag when
3285 parsing the subject alternative names.
Krzysztof Stachowiak00bbf572018-03-14 11:14:13 +01003286 * Fix a possible arithmetic overflow in ssl_parse_server_key_exchange()
3287 that could cause a key exchange to fail on valid data.
Krzysztof Stachowiak7fa1ae72018-03-13 17:17:38 +01003288 * Fix a possible arithmetic overflow in ssl_parse_server_psk_hint() that
3289 could cause a key exchange to fail on valid data.
Gilles Peskine8db3efb2018-02-21 19:16:20 +01003290 * Don't define mbedtls_aes_decrypt and mbedtls_aes_encrypt under
3291 MBEDTLS_DEPRECATED_REMOVED. #1388
Sanne Woudacf793122017-09-07 16:33:44 +01003292 * Fix a 1-byte heap buffer overflow (read-only) during private key parsing.
3293 Found through fuzz testing.
Gilles Peskine27b07542018-02-14 14:07:48 +01003294
3295Changes
3296 * Fix tag lengths and value ranges in the documentation of CCM encryption.
3297 Contributed by Mathieu Briand.
Gilles Peskine5daa7652018-02-14 14:10:24 +01003298 * Fix typo in a comment ctr_drbg.c. Contributed by Paul Sokolovsky.
Gilles Peskinedf298682018-02-14 15:49:54 +01003299 * Remove support for the library reference configuration for picocoin.
Gilles Peskinebb2565c2018-02-21 17:59:40 +01003300 * MD functions deprecated in 2.7.0 are no longer inline, to provide
3301 a migration path for those depending on the library's ABI.
Gilles Peskine9c4f4032017-05-29 14:46:36 +02003302 * Clarify the documentation of mbedtls_ssl_setup.
Gilles Peskine6dc4a312018-03-13 00:13:06 +01003303 * Use (void) when defining functions with no parameters. Contributed by
3304 Joris Aerts. #678
Gilles Peskine27b07542018-02-14 14:07:48 +01003305
Simon Butcher55fc4e02018-02-05 01:09:13 +00003306= mbed TLS 2.7.0 branch released 2018-02-03
Andres Amaya Garcia06fc6652017-06-26 15:19:26 +01003307
Gilles Peskine28a0c722017-10-17 19:01:38 +02003308Security
Simon Butcher55fc4e02018-02-05 01:09:13 +00003309 * Fix a heap corruption issue in the implementation of the truncated HMAC
3310 extension. When the truncated HMAC extension is enabled and CBC is used,
3311 sending a malicious application packet could be used to selectively corrupt
3312 6 bytes on the peer's heap, which could potentially lead to crash or remote
3313 code execution. The issue could be triggered remotely from either side in
3314 both TLS and DTLS. CVE-2018-0488
3315 * Fix a buffer overflow in RSA-PSS verification when the hash was too large
3316 for the key size, which could potentially lead to crash or remote code
3317 execution. Found by Seth Terashima, Qualcomm Product Security Initiative,
3318 Qualcomm Technologies Inc. CVE-2018-0487
3319 * Fix buffer overflow in RSA-PSS verification when the unmasked data is all
3320 zeros.
3321 * Fix an unsafe bounds check in ssl_parse_client_psk_identity() when adding
3322 64 KiB to the address of the SSL buffer and causing a wrap around.
3323 * Fix a potential heap buffer overflow in mbedtls_ssl_write(). When the (by
Hanno Becker930025d2017-09-18 16:07:19 +01003324 default enabled) maximum fragment length extension is disabled in the
3325 config and the application data buffer passed to mbedtls_ssl_write
3326 is larger than the internal message buffer (16384 bytes by default), the
3327 latter overflows. The exploitability of this issue depends on whether the
3328 application layer can be forced into sending such large packets. The issue
3329 was independently reported by Tim Nordell via e-mail and by Florin Petriuc
Simon Butcher55fc4e02018-02-05 01:09:13 +00003330 and sjorsdewit on GitHub. Fix proposed by Florin Petriuc in #1022.
3331 Fixes #707.
3332 * Add a provision to prevent compiler optimizations breaking the time
3333 constancy of mbedtls_ssl_safer_memcmp().
Andres Amaya Garcia364051f2017-07-05 15:40:17 +01003334 * Ensure that buffers are cleared after use if they contain sensitive data.
Andres Amaya Garciad48ba2b2017-07-06 17:17:43 +01003335 Changes were introduced in multiple places in the library.
Ron Eldor31162e42017-09-05 15:34:35 +03003336 * Set PEM buffer to zero before freeing it, to avoid decoded private keys
3337 being leaked to memory after release.
Janos Follathb174c842017-09-20 16:26:04 +01003338 * Fix dhm_check_range() failing to detect trivial subgroups and potentially
3339 leaking 1 bit of the private key. Reported by prashantkspatil.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003340 * Make mbedtls_mpi_read_binary() constant-time with respect to the input
3341 data. Previously, trailing zero bytes were detected and omitted for the
3342 sake of saving memory, but potentially leading to slight timing
3343 differences. Reported by Marco Macchetti, Kudelski Group.
Hanno Becker509fef72017-10-19 10:10:18 +01003344 * Wipe stack buffer temporarily holding EC private exponent
3345 after keypair generation.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003346 * Fix a potential heap buffer over-read in ALPN extension parsing
Manuel Pégourié-Gonnard239987f2018-01-09 10:43:43 +01003347 (server-side). Could result in application crash, but only if an ALPN
3348 name larger than 16 bytes had been configured on the server.
Hanno Becker0cd5b942017-10-13 17:17:28 +01003349 * Change default choice of DHE parameters from untrustworthy RFC 5114
3350 to RFC 3526 containing parameters generated in a nothing-up-my-sleeve
3351 manner.
Gilles Peskine28a0c722017-10-17 19:01:38 +02003352
Gilles Peskineb04e2c32017-09-29 15:45:12 +02003353Features
3354 * Allow comments in test data files.
Gilles Peskinec82fbb42017-12-15 15:01:27 +01003355 * The selftest program can execute a subset of the tests based on command
3356 line arguments.
Gilles Peskine8873bcc2017-10-27 18:42:32 +02003357 * New unit tests for timing. Improve the self-test to be more robust
3358 when run on a heavily-loaded machine.
Gilles Peskine618d0912018-01-02 16:04:19 +01003359 * Add alternative implementation support for CCM and CMAC (MBEDTLS_CCM_ALT,
Jaeden Amero91d49e82018-01-11 16:35:44 +00003360 MBEDTLS_CMAC_ALT). Submitted by Steven Cooreman, Silicon Labs.
Jaeden Amero15263302017-09-21 12:53:48 +01003361 * Add support for alternative implementations of GCM, selected by the
Gilles Peskine8e09d8f2018-01-02 16:09:42 +01003362 configuration flag MBEDTLS_GCM_ALT.
Ron Eldor314adb62017-10-10 18:28:25 +03003363 * Add support for alternative implementations for ECDSA, controlled by new
3364 configuration flags MBEDTLS_ECDSA_SIGN_ALT, MBEDTLS_ECDSA_VERIFY_ALT and
3365 MBEDTLS_ECDSDA_GENKEY_AT in config.h.
Ron Eldor2981a0a2017-09-24 15:41:09 +03003366 The following functions from the ECDSA module can be replaced
Ron Eldor314adb62017-10-10 18:28:25 +03003367 with alternative implementation:
Ron Eldor2981a0a2017-09-24 15:41:09 +03003368 mbedtls_ecdsa_sign(), mbedtls_ecdsa_verify() and mbedtls_ecdsa_genkey().
Hanno Becker087d5ad2018-01-24 16:06:25 +00003369 * Add support for alternative implementation of ECDH, controlled by the
3370 new configuration flags MBEDTLS_ECDH_COMPUTE_SHARED_ALT and
Ron Eldora84c1cb2017-10-10 19:04:27 +03003371 MBEDTLS_ECDH_GEN_PUBLIC_ALT in config.h.
Ron Eldor8b766212017-09-24 15:44:56 +03003372 The following functions from the ECDH module can be replaced
3373 with an alternative implementation:
3374 mbedtls_ecdh_gen_public() and mbedtls_ecdh_compute_shared().
Hanno Becker087d5ad2018-01-24 16:06:25 +00003375 * Add support for alternative implementation of ECJPAKE, controlled by
3376 the new configuration flag MBEDTLS_ECJPAKE_ALT.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003377 * Add mechanism to provide alternative implementation of the DHM module.
Gilles Peskine26182ed2017-09-29 15:45:12 +02003378
Hanno Beckera47023e2017-12-22 17:08:03 +00003379API Changes
3380 * Extend RSA interface by multiple functions allowing structure-
3381 independent setup and export of RSA contexts. Most notably,
Simon Butcher55fc4e02018-02-05 01:09:13 +00003382 mbedtls_rsa_import() and mbedtls_rsa_complete() are introduced for setting
Hanno Beckera47023e2017-12-22 17:08:03 +00003383 up RSA contexts from partial key material and having them completed to the
3384 needs of the implementation automatically. This allows to setup private RSA
3385 contexts from keys consisting of N,D,E only, even if P,Q are needed for the
3386 purpose or CRT and/or blinding.
3387 * The configuration option MBEDTLS_RSA_ALT can be used to define alternative
3388 implementations of the RSA interface declared in rsa.h.
Gilles Peskine0a969102018-01-22 14:55:20 +01003389 * The following functions in the message digest modules (MD2, MD4, MD5,
3390 SHA1, SHA256, SHA512) have been deprecated and replaced as shown below.
3391 The new functions change the return type from void to int to allow
3392 returning error codes when using MBEDTLS_<MODULE>_ALT.
3393 mbedtls_<MODULE>_starts() -> mbedtls_<MODULE>_starts_ret()
3394 mbedtls_<MODULE>_update() -> mbedtls_<MODULE>_update_ret()
3395 mbedtls_<MODULE>_finish() -> mbedtls_<MODULE>_finish_ret()
Andres Amaya Garciaf01a6442017-07-03 16:00:59 +01003396 mbedtls_<MODULE>_process() -> mbedtls_internal_<MODULE>_process()
Gilles Peskineb04e2c32017-09-29 15:45:12 +02003397
Ron Eldor73a38172017-10-03 15:58:26 +03003398New deprecations
3399 * Deprecate usage of RSA primitives with non-matching key-type
Simon Butcher55fc4e02018-02-05 01:09:13 +00003400 (e.g. signing with a public key).
Andres Amaya Garciaf569f702017-06-28 09:25:10 +01003401 * Direct manipulation of structure fields of RSA contexts is deprecated.
3402 Users are advised to use the extended RSA API instead.
Jaeden Amero005239e2018-01-25 14:47:39 +00003403 * Deprecate usage of message digest functions that return void
3404 (mbedtls_<MODULE>_starts, mbedtls_<MODULE>_update,
3405 mbedtls_<MODULE>_finish and mbedtls_<MODULE>_process where <MODULE> is
3406 any of MD2, MD4, MD5, SHA1, SHA256, SHA512) in favor of functions
3407 that can return an error code.
Hanno Becker0cd5b942017-10-13 17:17:28 +01003408 * Deprecate untrustworthy DHE parameters from RFC 5114. Superseded by
3409 parameters from RFC 3526 or the newly added parameters from RFC 7919.
3410 * Deprecate hex string DHE constants MBEDTLS_DHM_RFC3526_MODP_2048_P etc.
3411 Supserseded by binary encoded constants MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN
3412 etc.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003413 * Deprecate mbedtls_ssl_conf_dh_param() for setting default DHE parameters
3414 from hex strings. Superseded by mbedtls_ssl_conf_dh_param_bin()
Hanno Becker0cd5b942017-10-13 17:17:28 +01003415 accepting DHM parameters in binary form, matching the new constants.
Andres Amaya Garcia06fc6652017-06-26 15:19:26 +01003416
Andres Amaya Garcia06fc6652017-06-26 15:19:26 +01003417Bugfix
3418 * Fix ssl_parse_record_header() to silently discard invalid DTLS records
3419 as recommended in RFC 6347 Section 4.1.2.7.
Simon Butcher2c4f9462017-09-30 23:39:46 +01003420 * Fix memory leak in mbedtls_ssl_set_hostname() when called multiple times.
Simon Butcherb03120a2018-04-30 16:40:25 +01003421 Found by projectgus and Jethro Beekman, #836.
Simon Butcher16373a52017-10-02 19:12:54 +01003422 * Fix usage help in ssl_server2 example. Found and fixed by Bei Lin.
Ron Eldor73a38172017-10-03 15:58:26 +03003423 * Parse signature algorithm extension when renegotiating. Previously,
3424 renegotiated handshakes would only accept signatures using SHA-1
3425 regardless of the peer's preferences, or fail if SHA-1 was disabled.
Andres Amaya Garcia735b37e2016-11-21 15:38:02 +00003426 * Fix leap year calculation in x509_date_is_valid() to ensure that invalid
3427 dates on leap years with 100 and 400 intervals are handled correctly. Found
3428 by Nicholas Wilson. #694
Gilles Peskine91048a32017-10-19 17:46:14 +02003429 * Fix some invalid RSA-PSS signatures with keys of size 8N+1 that were
3430 accepted. Generating these signatures required the private key.
Gilles Peskinee7707222017-11-24 15:35:50 +01003431 * Fix out-of-memory problem when parsing 4096-bit PKCS8-encrypted RSA keys.
3432 Found independently by Florian in the mbed TLS forum and by Mishamax.
3433 #878, #1019.
Andres Amaya Garcia79ae0652017-06-27 16:17:54 +01003434 * Fix variable used before assignment compilation warnings with IAR
3435 toolchain. Found by gkerrien38.
Andres AG51a7ae12017-02-22 16:23:26 +00003436 * Fix unchecked return codes from AES, DES and 3DES functions in
3437 pem_aes_decrypt(), pem_des_decrypt() and pem_des3_decrypt() respectively.
3438 If a call to one of the functions of the cryptographic primitive modules
3439 failed, the error may not be noticed by the function
3440 mbedtls_pem_read_buffer() causing it to return invalid values. Found by
3441 Guido Vranken. #756
Gilles Peskine4b117d92017-11-28 17:23:37 +01003442 * Include configuration file in md.h, to fix compilation warnings.
3443 Reported by aaronmdjones in #1001
Hanno Becker041a6b02017-09-28 14:52:26 +01003444 * Correct extraction of signature-type from PK instance in X.509 CRT and CSR
3445 writing routines that prevented these functions to work with alternative
3446 RSA implementations. Raised by J.B. in the Mbed TLS forum. Fixes #1011.
Hanno Becker86e52302017-10-05 09:08:53 +01003447 * Don't print X.509 version tag for v1 CRT's, and omit extensions for
3448 non-v3 CRT's.
Gilles Peskined742b742017-11-28 17:40:56 +01003449 * Fix bugs in RSA test suite under MBEDTLS_NO_PLATFORM_ENTROPY. #1023 #1024
Simon Butcher55fc4e02018-02-05 01:09:13 +00003450 * Fix net_would_block() to avoid modification by errno through fcntl() call.
Hanno Beckera6ed9c52017-05-04 13:39:22 +01003451 Found by nkolban. Fixes #845.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003452 * Fix handling of handshake messages in mbedtls_ssl_read() in case
Hanno Becker479e8e22017-10-12 15:39:45 +01003453 MBEDTLS_SSL_RENEGOTIATION is disabled. Found by erja-gp.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003454 * Add a check for invalid private parameters in mbedtls_ecdsa_sign().
Darryl Green36ba8b62017-11-21 09:55:33 +00003455 Reported by Yolan Romailler.
Gilles Peskineff01e002017-12-01 23:42:17 +01003456 * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64.
Gilles Peskined6294112017-12-01 23:46:58 +01003457 * Fix incorrect unit in benchmark output. #850
Hanno Becker81e96dd2017-09-18 11:07:25 +01003458 * Add size-checks for record and handshake message content, securing
3459 fragile yet non-exploitable code-paths.
Ron Eldore1a9a4a2017-10-17 18:15:41 +03003460 * Fix crash when calling mbedtls_ssl_cache_free() twice. Found by
3461 MilenkoMitrovic, #1104
Manuel Pégourié-Gonnard54059622018-01-29 10:16:30 +01003462 * Fix mbedtls_timing_alarm(0) on Unix and MinGW.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003463 * Fix use of uninitialized memory in mbedtls_timing_get_timer() when reset=1.
Gilles Peskineec9c6262018-01-02 16:27:50 +01003464 * Fix possible memory leaks in mbedtls_gcm_self_test().
3465 * Added missing return code checks in mbedtls_aes_self_test().
Hanno Becker997e2182018-01-10 10:39:20 +00003466 * Fix issues in RSA key generation program programs/x509/rsa_genkey and the
3467 RSA test suite where the failure of CTR DRBG initialization lead to
3468 freeing an RSA context and several MPI's without proper initialization
3469 beforehand.
Gilles Peskine980d2032018-01-22 23:10:53 +01003470 * Fix error message in programs/pkey/gen_key.c. Found and fixed by Chris Xue.
Gilles Peskinecb1e5eb2018-01-23 00:57:34 +01003471 * Fix programs/pkey/dh_server.c so that it actually works with dh_client.c.
3472 Found and fixed by Martijn de Milliano.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003473 * Fix an issue in the cipher decryption with the mode
3474 MBEDTLS_PADDING_ONE_AND_ZEROS that sometimes accepted invalid padding.
3475 Note, this padding mode is not used by the TLS protocol. Found and fixed by
3476 Micha Kraus.
Gilles Peskined91f2a22018-01-19 11:25:10 +01003477 * Fix the entropy.c module to not call mbedtls_sha256_starts() or
3478 mbedtls_sha512_starts() in the mbedtls_entropy_init() function.
3479 * Fix the entropy.c module to ensure that mbedtls_sha256_init() or
3480 mbedtls_sha512_init() is called before operating on the relevant context
Gilles Peskine0a969102018-01-22 14:55:20 +01003481 structure. Do not assume that zeroizing a context is a correct way to
3482 reset it. Found independently by ccli8 on Github.
3483 * In mbedtls_entropy_free(), properly free the message digest context.
Simon Butcher55fc4e02018-02-05 01:09:13 +00003484 * Fix status handshake status message in programs/ssl/dtls_client.c. Found
3485 and fixed by muddog.
Hanno Becker86e52302017-10-05 09:08:53 +01003486
3487Changes
Simon Butcher55fc4e02018-02-05 01:09:13 +00003488 * Extend cert_write example program by options to set the certificate version
Hanno Becker86e52302017-10-05 09:08:53 +01003489 and the message digest. Further, allow enabling/disabling of authority
3490 identifier, subject identifier and basic constraints extensions.
Hanno Becker32297e82017-12-22 10:24:32 +00003491 * Only check for necessary RSA structure fields in `mbedtls_rsa_private`. In
3492 particular, don't require P,Q if neither CRT nor blinding are
3493 used. Reported and fix proposed independently by satur9nine and sliai
3494 on GitHub.
Gilles Peskineec9c6262018-01-02 16:27:50 +01003495 * Only run AES-192 self-test if AES-192 is available. Fixes #963.
Gilles Peskine50984002018-01-17 08:01:37 +01003496 * Tighten the RSA PKCS#1 v1.5 signature verification code and remove the
3497 undeclared dependency of the RSA module on the ASN.1 module.
Gilles Peskine0a969102018-01-22 14:55:20 +01003498 * Update all internal usage of deprecated message digest functions to the
3499 new ones with return codes. In particular, this modifies the
3500 mbedtls_md_info_t structure. Propagate errors from these functions
3501 everywhere except some locations in the ssl_tls.c module.
Jaeden Amero791e08a2018-01-26 12:04:12 +00003502 * Improve CTR_DRBG error handling by propagating underlying AES errors.
Gilles Peskine7ecab3d2018-01-26 17:56:38 +01003503 * Add MBEDTLS_ERR_XXX_HW_ACCEL_FAILED error codes for all cryptography
3504 modules where the software implementation can be replaced by a hardware
3505 implementation.
Hanno Becker2a037942017-10-06 12:29:50 +01003506 * Add explicit warnings for the use of MD2, MD4, MD5, SHA-1, DES and ARC4
3507 throughout the library.
Andres Amaya Garcia06fc6652017-06-26 15:19:26 +01003508
Simon Butcher72ea31b2017-08-10 11:51:16 +01003509= mbed TLS 2.6.0 branch released 2017-08-10
Ron Eldord5a75f42016-12-16 16:15:56 +02003510
Simon Butcherb060cc22017-07-28 01:04:34 +01003511Security
Simon Butcher01971d02017-08-10 10:48:01 +01003512 * Fix authentication bypass in SSL/TLS: when authmode is set to optional,
Simon Butcherf85c90a2017-07-27 15:11:52 +01003513 mbedtls_ssl_get_verify_result() would incorrectly return 0 when the peer's
3514 X.509 certificate chain had more than MBEDTLS_X509_MAX_INTERMEDIATE_CA
Simon Butcher01971d02017-08-10 10:48:01 +01003515 (default: 8) intermediates, even when it was not trusted. This could be
3516 triggered remotely from either side. (With authmode set to 'required'
Simon Butcher3f2557e2017-08-01 18:06:12 +01003517 (the default), the handshake was correctly aborted).
3518 * Reliably wipe sensitive data after use in the AES example applications
Hanno Becker7ec83df2017-06-27 08:26:53 +01003519 programs/aes/aescrypt2 and programs/aes/crypt_and_hash.
3520 Found by Laurent Simon.
Simon Butcherf85c90a2017-07-27 15:11:52 +01003521
Andres Amaya Garcia2187e032017-07-07 13:19:13 +01003522Features
3523 * Add the functions mbedtls_platform_setup() and mbedtls_platform_teardown()
Andres Amaya Garcia24f36412017-07-12 11:27:05 +01003524 and the context struct mbedtls_platform_context to perform
3525 platform-specific setup and teardown operations. The macro
Andres Amaya Garcia5478bc72017-07-18 10:24:26 +01003526 MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT allows the functions to be overridden
Simon Butcher3f2557e2017-08-01 18:06:12 +01003527 by the user in a platform_alt.h file. These new functions are required in
Simon Butcher01971d02017-08-10 10:48:01 +01003528 some embedded environments to provide a means of initialising underlying
3529 cryptographic acceleration hardware.
Andres Amaya Garcia2187e032017-07-07 13:19:13 +01003530
Simon Butcherab670432017-07-20 12:33:41 +02003531API Changes
3532 * Reverted API/ABI breaking changes introduced in mbed TLS 2.5.1, to make the
3533 API consistent with mbed TLS 2.5.0. Specifically removed the inline
3534 qualifier from the functions mbedtls_aes_decrypt, mbedtls_aes_encrypt,
Simon Butcher3f2557e2017-08-01 18:06:12 +01003535 mbedtls_ssl_ciphersuite_uses_ec and mbedtls_ssl_ciphersuite_uses_psk. Found
3536 by James Cowgill. #978
Simon Butcherf85c90a2017-07-27 15:11:52 +01003537 * Certificate verification functions now set flags to -1 in case the full
3538 chain was not verified due to an internal error (including in the verify
3539 callback) or chain length limitations.
Simon Butcher01971d02017-08-10 10:48:01 +01003540 * With authmode set to optional, the TLS handshake is now aborted if the
Simon Butcherf85c90a2017-07-27 15:11:52 +01003541 verification of the peer's certificate failed due to an overlong chain or
Simon Butcher01971d02017-08-10 10:48:01 +01003542 a fatal error in the verify callback.
Simon Butcherab670432017-07-20 12:33:41 +02003543
Ron Eldore2efaea2016-12-16 16:15:56 +02003544Bugfix
Simon Butcher01971d02017-08-10 10:48:01 +01003545 * Add a check if iv_len is zero in GCM, and return an error if it is zero.
3546 Reported by roberto. #716
3547 * Replace preprocessor condition from #if defined(MBEDTLS_THREADING_PTHREAD)
Ron Eldor63140682017-01-09 19:27:59 +02003548 to #if defined(MBEDTLS_THREADING_C) as the library cannot assume they will
Simon Butcher3f2557e2017-08-01 18:06:12 +01003549 always be implemented by pthread support. #696
Simon Butcher01971d02017-08-10 10:48:01 +01003550 * Fix a resource leak on Windows platforms in mbedtls_x509_crt_parse_path(),
3551 in the case of an error. Found by redplait. #590
Ron Eldorca6ff582017-01-12 14:50:50 +02003552 * Add MBEDTLS_MPI_CHK to check for error value of mbedtls_mpi_fill_random.
Simon Butcher3f2557e2017-08-01 18:06:12 +01003553 Reported and fix suggested by guidovranken. #740
Andres Amaya Garciab820bf82017-05-04 11:05:55 +01003554 * Fix conditional preprocessor directives in bignum.h to enable 64-bit
3555 compilation when using ARM Compiler 6.
Simon Butcher5deb5182017-07-26 17:25:55 +01003556 * Fix a potential integer overflow in the version verification for DER
Simon Butcher3f2557e2017-08-01 18:06:12 +01003557 encoded X.509 CRLs. The overflow could enable maliciously constructed CRLs
Simon Butcher5deb5182017-07-26 17:25:55 +01003558 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
3559 KNOX Security, Samsung Research America
Andres AG2e65a542017-02-17 13:54:43 +00003560 * Fix potential integer overflow in the version verification for DER
Simon Butcher3f2557e2017-08-01 18:06:12 +01003561 encoded X.509 CSRs. The overflow could enable maliciously constructed CSRs
Andres AG2e65a542017-02-17 13:54:43 +00003562 to bypass the version verification check. Found by Peng Li/Yueh-Hsun Lin,
3563 KNOX Security, Samsung Research America
Simon Butcher5deb5182017-07-26 17:25:55 +01003564 * Fix a potential integer overflow in the version verification for DER
Simon Butcher3f2557e2017-08-01 18:06:12 +01003565 encoded X.509 certificates. The overflow could enable maliciously
Simon Butcher5deb5182017-07-26 17:25:55 +01003566 constructed certificates to bypass the certificate verification check.
Simon Butchera418e822017-07-28 23:52:10 +01003567 * Fix a call to the libc function time() to call the platform abstraction
Simon Butcher3f2557e2017-08-01 18:06:12 +01003568 function mbedtls_time() instead. Found by wairua. #666
3569 * Avoid shadowing of time and index functions through mbed TLS function
3570 arguments. Found by inestlerode. #557.
Manuel Pégourié-Gonnardd15795a2017-06-22 12:19:27 +02003571
Janos Follath78b14732017-06-22 10:02:07 +01003572Changes
Janos Follathb85291c2017-06-22 10:02:07 +01003573 * Added config.h option MBEDTLS_NO_UDBL_DIVISION, to prevent the use of
Simon Butcher3f2557e2017-08-01 18:06:12 +01003574 64-bit division. This is useful on embedded platforms where 64-bit division
3575 created a dependency on external libraries. #708
Janos Follath78b14732017-06-22 10:02:07 +01003576 * Removed mutexes from ECP hardware accelerator code. Now all hardware
3577 accelerator code in the library leaves concurrency handling to the
3578 platform. Reported by Steven Cooreman. #863
Andres Amaya Garciad0e15d72017-06-26 12:57:44 +01003579 * Define the macro MBEDTLS_AES_ROM_TABLES in the configuration file
3580 config-no-entropy.h to reduce the RAM footprint.
Simon Butcher3f2557e2017-08-01 18:06:12 +01003581 * Added a test script that can be hooked into git that verifies commits
3582 before they are pushed.
Hanno Becker85b602e2017-05-04 11:27:39 +01003583 * Improve documentation of PKCS1 decryption functions.
Janos Follath78b14732017-06-22 10:02:07 +01003584
Simon Butcherf2a597f2017-06-20 23:08:10 +01003585= mbed TLS 2.5.1 released 2017-06-21
Hanno Beckereccf60c2017-06-05 15:19:01 +01003586
Gilles Peskine5e79cb32017-05-04 16:17:21 +02003587Security
Hanno Beckerbf4c2e32017-06-09 11:28:45 +01003588 * Fixed unlimited overread of heap-based buffer in mbedtls_ssl_read().
3589 The issue could only happen client-side with renegotiation enabled.
3590 Could result in DoS (application crash) or information leak
3591 (if the application layer sent data read from mbedtls_ssl_read()
3592 back to the server or to a third party). Can be triggered remotely.
Gilles Peskine5d2511c2017-05-12 13:16:40 +02003593 * Removed SHA-1 and RIPEMD-160 from the default hash algorithms for
3594 certificate verification. SHA-1 can be turned back on with a compile-time
3595 option if needed.
Gilles Peskined50177f2017-05-16 17:53:03 +02003596 * Fixed offset in FALLBACK_SCSV parsing that caused TLS server to fail to
3597 detect it sometimes. Reported by Hugo Leisink. #810
Manuel Pégourié-Gonnardc1380de2017-05-11 12:49:51 +02003598 * Tighten parsing of RSA PKCS#1 v1.5 signatures, to avoid a
3599 potential Bleichenbacher/BERserk-style attack.
Gilles Peskine5e79cb32017-05-04 16:17:21 +02003600
Hanno Beckereccf60c2017-06-05 15:19:01 +01003601Bugfix
Janos Follath5a1c0e72017-06-16 09:00:07 +01003602 * Remove size zero arrays from ECJPAKE test suite. Size zero arrays are not
3603 valid C and they prevented the test from compiling in Visual Studio 2015
3604 and with GCC using the -Wpedantic compilation option.
Hanno Becker7e5437a2017-04-28 17:15:26 +01003605 * Fix insufficient support for signature-hash-algorithm extension,
3606 resulting in compatibility problems with Chrome. Found by hfloyrd. #823
Janos Follath5a1c0e72017-06-16 09:00:07 +01003607 * Fix behaviour that hid the original cause of fatal alerts in some cases
3608 when sending the alert failed. The fix makes sure not to hide the error
Gilles Peskine3df98f52017-05-10 17:47:40 +02003609 that triggered the alert.
Janos Follath5a1c0e72017-06-16 09:00:07 +01003610 * Fix SSLv3 renegotiation behaviour and stop processing data received from
3611 peer after sending a fatal alert to refuse a renegotiation attempt.
3612 Previous behaviour was to keep processing data even after the alert has
3613 been sent.
Hanno Becker39ae8cd2017-05-08 16:31:14 +01003614 * Accept empty trusted CA chain in authentication mode
Simon Butcherb03120a2018-04-30 16:40:25 +01003615 MBEDTLS_SSL_VERIFY_OPTIONAL. Found by Jethro Beekman. #864
Janos Follath5a1c0e72017-06-16 09:00:07 +01003616 * Fix implementation of mbedtls_ssl_parse_certificate() to not annihilate
3617 fatal errors in authentication mode MBEDTLS_SSL_VERIFY_OPTIONAL and to
3618 reflect bad EC curves within verification result.
3619 * Fix bug that caused the modular inversion function to accept the invalid
3620 modulus 1 and therefore to hang. Found by blaufish. #641.
3621 * Fix incorrect sign computation in modular exponentiation when the base is
3622 a negative MPI. Previously the result was always negative. Found by Guido
3623 Vranken.
3624 * Fix a numerical underflow leading to stack overflow in mpi_read_file()
3625 that was triggered uppon reading an empty line. Found by Guido Vranken.
Gilles Peskine3df98f52017-05-10 17:47:40 +02003626
Gilles Peskine36091fe2017-05-03 16:55:03 +02003627Changes
Janos Follath5a1c0e72017-06-16 09:00:07 +01003628 * Send fatal alerts in more cases. The previous behaviour was to skip
3629 sending the fatal alert and just drop the connection.
Janos Follath0a5154b2017-03-10 11:31:41 +00003630 * Clarify ECDSA documentation and improve the sample code to avoid
Janos Follath5a1c0e72017-06-16 09:00:07 +01003631 misunderstanding and potentially dangerous use of the API. Pointed out
Janos Follath0a5154b2017-03-10 11:31:41 +00003632 by Jean-Philippe Aumasson.
Gilles Peskine36091fe2017-05-03 16:55:03 +02003633
Simon Butcher9f770172017-05-15 15:13:59 +01003634= mbed TLS 2.5.0 branch released 2017-05-17
Andres Amaya Garcia75fdf632017-05-02 16:01:20 +01003635
Janos Follath45182a02017-03-23 10:41:56 +00003636Security
Gilles Peskine4a7f6a02017-03-23 14:37:37 +01003637 * Wipe stack buffers in RSA private key operations
Janos Follath5a1c0e72017-06-16 09:00:07 +01003638 (rsa_rsaes_pkcs1_v15_decrypt(), rsa_rsaes_oaep_decrypt). Found by Laurent
3639 Simon.
Janos Follath45182a02017-03-23 10:41:56 +00003640 * Add exponent blinding to RSA private operations as a countermeasure
3641 against side-channel attacks like the cache attack described in
3642 https://arxiv.org/abs/1702.08719v2.
3643 Found and fix proposed by Michael Schwarz, Samuel Weiser, Daniel Gruss,
3644 Clémentine Maurice and Stefan Mangard.
3645
Simon Butcher4775e832017-05-13 22:56:08 +01003646Features
Janos Follath5a1c0e72017-06-16 09:00:07 +01003647 * Add hardware acceleration support for the Elliptic Curve Point module.
3648 This involved exposing parts of the internal interface to enable
3649 replacing the core functions and adding and alternative, module level
3650 replacement support for enabling the extension of the interface.
Janos Follath7a8a0902017-04-10 16:13:06 +01003651 * Add a new configuration option to 'mbedtls_ssl_config' to enable
3652 suppressing the CA list in Certificate Request messages. The default
3653 behaviour has not changed, namely every configured CAs name is included.
3654
Andres AGf5bf7182017-03-03 14:09:56 +00003655API Changes
3656 * The following functions in the AES module have been deprecated and replaced
3657 by the functions shown below. The new functions change the return type from
3658 void to int to allow returning error codes when using MBEDTLS_AES_ALT,
3659 MBEDTLS_AES_DECRYPT_ALT or MBEDTLS_AES_ENCRYPT_ALT.
3660 mbedtls_aes_decrypt() -> mbedtls_internal_aes_decrypt()
3661 mbedtls_aes_encrypt() -> mbedtls_internal_aes_encrypt()
3662
Andres Amaya Garcia75fdf632017-05-02 16:01:20 +01003663Bugfix
3664 * Remove macros from compat-1.3.h that correspond to deleted items from most
3665 recent versions of the library. Found by Kyle Keen.
Janos Follath5a1c0e72017-06-16 09:00:07 +01003666 * Fixed issue in the Threading module that prevented mutexes from
3667 initialising. Found by sznaider. #667 #843
3668 * Add checks in the PK module for the RSA functions on 64-bit systems.
3669 The PK and RSA modules use different types for passing hash length and
3670 without these checks the type cast could lead to data loss. Found by Guido
3671 Vranken.
Andres Amaya Garcia75fdf632017-05-02 16:01:20 +01003672
Simon Butcherb65c2be2017-03-10 18:50:44 +00003673= mbed TLS 2.4.2 branch released 2017-03-08
Andres AG703990b2016-10-24 11:23:36 +01003674
Janos Follath182013f2016-10-25 10:50:22 +01003675Security
Simon Butcherb65c2be2017-03-10 18:50:44 +00003676 * Add checks to prevent signature forgeries for very large messages while
3677 using RSA through the PK module in 64-bit systems. The issue was caused by
3678 some data loss when casting a size_t to an unsigned int value in the
3679 functions rsa_verify_wrap(), rsa_sign_wrap(), rsa_alt_sign_wrap() and
3680 mbedtls_pk_sign(). Found by Jean-Philippe Aumasson.
Andres AG939954c2016-12-08 17:08:44 +00003681 * Fixed potential livelock during the parsing of a CRL in PEM format in
3682 mbedtls_x509_crl_parse(). A string containing a CRL followed by trailing
3683 characters after the footer could result in the execution of an infinite
3684 loop. The issue can be triggered remotely. Found by Greg Zaverucha,
3685 Microsoft.
Janos Follath182013f2016-10-25 10:50:22 +01003686 * Removed MD5 from the allowed hash algorithms for CertificateRequest and
3687 CertificateVerify messages, to prevent SLOTH attacks against TLS 1.2.
Simon Butcher0621b1f2017-02-05 16:48:47 +00003688 Introduced by interoperability fix for #513.
Janos Follath7dadc2f2017-01-27 16:05:20 +00003689 * Fixed a bug that caused freeing a buffer that was allocated on the stack,
3690 when verifying the validity of a key on secp224k1. This could be
3691 triggered remotely for example with a maliciously constructed certificate
Simon Butcher71e9d582017-02-28 18:47:27 +00003692 and potentially could lead to remote code execution on some platforms.
Simon Butcher8b987502017-03-07 12:37:14 +00003693 Reported independently by rongsaws and Aleksandar Nikolic, Cisco Talos
3694 team. #569 CVE-2017-2784
Janos Follath7dadc2f2017-01-27 16:05:20 +00003695
Andres AG703990b2016-10-24 11:23:36 +01003696Bugfix
Andres AGd1650662016-12-09 17:26:23 +00003697 * Fix output certificate verification flags set by x509_crt_verify_top() when
3698 traversing a chain of trusted CA. The issue would cause both flags,
3699 MBEDTLS_X509_BADCERT_NOT_TRUSTED and MBEDTLS_X509_BADCERT_EXPIRED, to be
3700 set when the verification conditions are not met regardless of the cause.
3701 Found by Harm Verhagen and inestlerode. #665 #561
Simon Butcherd57c8f02017-02-02 13:08:37 +00003702 * Fix the redefinition of macro ssl_set_bio to an undefined symbol
3703 mbedtls_ssl_set_bio_timeout in compat-1.3.h, by removing it.
3704 Found by omlib-lin. #673
Andres AGc0db5112016-12-07 15:05:53 +00003705 * Fix unused variable/function compilation warnings in pem.c, x509_crt.c and
3706 x509_csr.c that are reported when building mbed TLS with a config.h that
Simon Butchera333b3c2017-02-02 16:17:37 +00003707 does not define MBEDTLS_PEM_PARSE_C. Found by omnium21. #562
Andres AG2196c7f2016-12-15 17:01:16 +00003708 * Fix incorrect renegotiation condition in ssl_check_ctr_renegotiate() that
3709 would compare 64 bits of the record counter instead of 48 bits as indicated
3710 in RFC 6347 Section 4.3.1. This could cause the execution of the
3711 renegotiation routines at unexpected times when the protocol is DTLS. Found
3712 by wariua. #687
Andres AG703990b2016-10-24 11:23:36 +01003713 * Fixed multiple buffer overreads in mbedtls_pem_read_buffer() when parsing
Andres AG9c94b692016-10-24 14:31:54 +01003714 the input string in PEM format to extract the different components. Found
Andres AG703990b2016-10-24 11:23:36 +01003715 by Eyal Itkin.
Andres Amaya Garcia6a543362017-01-17 23:04:22 +00003716 * Fixed potential arithmetic overflow in mbedtls_ctr_drbg_reseed() that could
3717 cause buffer bound checks to be bypassed. Found by Eyal Itkin.
3718 * Fixed potential arithmetic overflows in mbedtls_cipher_update() that could
3719 cause buffer bound checks to be bypassed. Found by Eyal Itkin.
3720 * Fixed potential arithmetic overflow in mbedtls_md2_update() that could
3721 cause buffer bound checks to be bypassed. Found by Eyal Itkin.
Andres AG4623d832017-01-18 17:21:03 +00003722 * Fixed potential arithmetic overflow in mbedtls_base64_decode() that could
3723 cause buffer bound checks to be bypassed. Found by Eyal Itkin.
Janos Follath87c98072017-02-03 12:36:59 +00003724 * Fixed heap overreads in mbedtls_x509_get_time(). Found by Peng
3725 Li/Yueh-Hsun Lin, KNOX Security, Samsung Research America.
Andres AG5708dcb2016-12-08 17:19:21 +00003726 * Fix potential memory leak in mbedtls_x509_crl_parse(). The leak was caused
3727 by missing calls to mbedtls_pem_free() in cases when a
Simon Butcherd02dc142017-02-28 16:36:22 +00003728 MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT error was encountered. Found and
3729 fix proposed by Guido Vranken. #722
Simon Butcher956c58f2017-03-02 09:18:09 +00003730 * Fixed the templates used to generate project and solution files for Visual
3731 Studio 2015 as well as the files themselves, to remove a build warning
3732 generated in Visual Studio 2015. Reported by Steve Valliere. #742
Ron Eldor12e0b802017-01-29 18:51:35 +02003733 * Fix a resource leak in ssl_cookie, when using MBEDTLS_THREADING_C.
3734 Raised and fix suggested by Alan Gillingham in the mbed TLS forum. #771
Andres AGd1cc7f62017-01-06 13:17:35 +00003735 * Fix 1 byte buffer overflow in mbedtls_mpi_write_string() when the MPI
3736 number to write in hexadecimal is negative and requires an odd number of
3737 digits. Found and fixed by Guido Vranken.
Simon Butcher81cf88f2017-03-07 19:35:49 +00003738 * Fix unlisted DES configuration dependency in some pkparse test cases. Found
3739 by inestlerode. #555
Andres AG703990b2016-10-24 11:23:36 +01003740
Janos Follath4c006cd2016-12-13 14:14:03 +00003741= mbed TLS 2.4.1 branch released 2016-12-13
Janos Follath5da3a6f2016-12-13 11:51:04 +00003742
3743Changes
3744 * Update to CMAC test data, taken from - NIST Special Publication 800-38B -
3745 Recommendation for Block Cipher Modes of Operation: The CMAC Mode for
3746 Authentication – October 2016
3747
Simon Butcher19dbd412016-10-16 19:35:49 +01003748= mbed TLS 2.4.0 branch released 2016-10-17
Simon Butchercf8c1f42016-09-02 21:29:39 +03003749
Andres AG60dbc932016-09-02 15:23:48 +01003750Security
Simon Butcheref8fa012016-10-16 00:44:08 +01003751 * Removed the MBEDTLS_SSL_AEAD_RANDOM_IV option, because it was not compliant
3752 with RFC-5116 and could lead to session key recovery in very long TLS
3753 sessions. "Nonce-Disrespecting Adversaries Practical Forgery Attacks on GCM in
3754 TLS" - H. Bock, A. Zauner, S. Devlin, J. Somorovsky, P. Jovanovic.
3755 https://eprint.iacr.org/2016/475.pdf
3756 * Fixed potential stack corruption in mbedtls_x509write_crt_der() and
Andres AG60dbc932016-09-02 15:23:48 +01003757 mbedtls_x509write_csr_der() when the signature is copied to the buffer
Andres AGe0af9952016-09-07 11:09:44 +01003758 without checking whether there is enough space in the destination. The
Simon Butcheref8fa012016-10-16 00:44:08 +01003759 issue cannot be triggered remotely. Found by Jethro Beekman.
Andres AG60dbc932016-09-02 15:23:48 +01003760
Simon Butchercf8c1f42016-09-02 21:29:39 +03003761Features
Simon Butcher21c54812016-10-05 14:17:37 +01003762 * Added support for CMAC for AES and 3DES and AES-CMAC-PRF-128, as defined by
3763 NIST SP 800-38B, RFC-4493 and RFC-4615.
Simon Butchercf8c1f42016-09-02 21:29:39 +03003764 * Added hardware entropy selftest to verify that the hardware entropy source
3765 is functioning correctly.
3766 * Added a script to print build environment info for diagnostic use in test
3767 scripts, which is also now called by all.sh.
Andres AGf9113192016-09-02 14:06:04 +01003768 * Added the macro MBEDTLS_X509_MAX_FILE_PATH_LEN that enables the user to
3769 configure the maximum length of a file path that can be buffered when
3770 calling mbedtls_x509_crt_parse_path().
Simon Butcheref8fa012016-10-16 00:44:08 +01003771 * Added a configuration file config-no-entropy.h that configures the subset of
Andres AGf84f8922016-09-19 15:33:30 +01003772 library features that do not require an entropy source.
Andres AG7abc9742016-09-23 17:58:49 +01003773 * Added the macro MBEDTLS_ENTROPY_MIN_HARDWARE in config.h. This allows users
3774 to configure the minimum number of bytes for entropy sources using the
3775 mbedtls_hardware_poll() function.
Simon Butchercf8c1f42016-09-02 21:29:39 +03003776
3777Bugfix
3778 * Fix for platform time abstraction to avoid dependency issues where a build
3779 may need time but not the standard C library abstraction, and added
3780 configuration consistency checks to check_config.h
3781 * Fix dependency issue in Makefile to allow parallel builds.
Simon Butcheref8fa012016-10-16 00:44:08 +01003782 * Fix incorrect handling of block lengths in crypt_and_hash.c sample program,
3783 when GCM is used. Found by udf2457. #441
Simon Butchercad6e932016-09-05 01:46:59 +03003784 * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
3785 enabled unless others were also present. Found by David Fernandez. #428
Simon Butcherc0d76b82016-09-07 17:25:16 +03003786 * Fix for out-of-tree builds using CMake. Found by jwurzer, and fix based on
3787 a contribution from Tobias Tangemann. #541
Simon Butcheref8fa012016-10-16 00:44:08 +01003788 * Fixed cert_app.c sample program for debug output and for use when no root
Simon Butcherd43fb952016-09-26 20:48:56 +01003789 certificates are provided.
Andres AG776a6fc2016-09-26 09:52:41 +01003790 * Fix conditional statement that would cause a 1 byte overread in
Simon Butcher3a5e0702016-10-12 16:37:59 +01003791 mbedtls_asn1_get_int(). Found and fixed by Guido Vranken. #599
Simon Butcher851ae292016-10-11 10:13:52 +01003792 * Fixed pthread implementation to avoid unintended double initialisations
Simon Butcheref8fa012016-10-16 00:44:08 +01003793 and double frees. Found by Niklas Amnebratt.
Simon Butcherf77309c2016-10-07 15:56:07 +01003794 * Fixed the sample applications gen_key.c, cert_req.c and cert_write.c for
3795 builds where the configuration MBEDTLS_PEM_WRITE_C is not defined. Found
3796 by inestlerode. #559.
Andres AG4bdbe092016-09-19 16:58:45 +01003797 * Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf
3798 data structure until after error checks are successful. Found by
Simon Butcherb81496b2016-10-13 14:03:37 +01003799 subramanyam-c. #622
Andres AG821da842016-09-26 10:09:30 +01003800 * Fix documentation and implementation missmatch for function arguments of
Simon Butcherf6e3b9e2016-10-12 19:47:29 +01003801 mbedtls_gcm_finish(). Found by cmiatpaar. #602
Simon Butcher4d69ecd2016-10-13 00:14:37 +01003802 * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558
Andres AG5a87c932016-09-26 14:53:05 +01003803 * Fix potential byte overread when verifying malformed SERVER_HELLO in
3804 ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken.
Andres AG4b76aec2016-09-23 13:16:02 +01003805 * Fix check for validity of date when parsing in mbedtls_x509_get_time().
Simon Butcher2bd0fba2016-10-13 16:29:56 +01003806 Found by subramanyam-c. #626
Simon Butcher99000142016-10-13 17:21:01 +01003807 * Fix compatibility issue with Internet Explorer client authentication,
3808 where the limited hash choices prevented the client from sending its
3809 certificate. Found by teumas. #513
Janos Follath240f1852016-10-14 15:23:21 +01003810 * Fix compilation without MBEDTLS_SELF_TEST enabled.
Simon Butchercf8c1f42016-09-02 21:29:39 +03003811
3812Changes
3813 * Extended test coverage of special cases, and added new timing test suite.
3814 * Removed self-tests from the basic-built-test.sh script, and added all
3815 missing self-tests to the test suites, to ensure self-tests are only
3816 executed once.
3817 * Added support for 3 and 4 byte lengths to mbedtls_asn1_write_len().
3818 * Added support for a Yotta specific configuration file -
3819 through the symbol YOTTA_CFG_MBEDTLS_TARGET_CONFIG_FILE.
Simon Butcher5908bcc2016-09-04 15:12:09 +01003820 * Added optimization for code space for X.509/OID based on configured
Simon Butcheref8fa012016-10-16 00:44:08 +01003821 features. Contributed by Aviv Palivoda.
Andres AG788aa4a2016-09-14 14:32:09 +01003822 * Renamed source file library/net.c to library/net_sockets.c to avoid
3823 naming collision in projects which also have files with the common name
3824 net.c. For consistency, the corresponding header file, net.h, is marked as
3825 deprecated, and its contents moved to net_sockets.h.
Simon Butcher59bffa22016-10-13 15:55:56 +01003826 * Changed the strategy for X.509 certificate parsing and validation, to no
3827 longer disregard certificates with unrecognised fields.
Simon Butchercf8c1f42016-09-02 21:29:39 +03003828
Simon Butcher46125fb2016-06-27 19:43:55 +01003829= mbed TLS 2.3.0 branch released 2016-06-28
Manuel Pégourié-Gonnardafbb3102016-01-07 13:26:11 +01003830
Janos Follathcc4eba72016-02-10 16:25:55 +00003831Security
Janos Follathe43b81a2016-02-10 16:25:55 +00003832 * Fix missing padding length check in mbedtls_rsa_rsaes_pkcs1_v15_decrypt
Janos Follath3218b212016-02-10 16:14:10 +00003833 required by PKCS1 v2.2
Janos Follathe43b81a2016-02-10 16:25:55 +00003834 * Fix potential integer overflow to buffer overflow in
3835 mbedtls_rsa_rsaes_pkcs1_v15_encrypt and mbedtls_rsa_rsaes_oaep_encrypt
Manuel Pégourié-Gonnard8ddc93f2016-02-11 10:35:13 +01003836 (not triggerable remotely in (D)TLS).
Hanno Becker01a0e072017-07-26 11:49:40 +01003837 * Fix a potential integer underflow to buffer overread in
Janos Follathbc247c92016-02-11 11:15:44 +00003838 mbedtls_rsa_rsaes_oaep_decrypt. It is not triggerable remotely in
3839 SSL/TLS.
Janos Follathcc4eba72016-02-10 16:25:55 +00003840
Simon Butcher3fe6cd32016-04-26 19:51:29 +01003841Features
3842 * Support for platform abstraction of the standard C library time()
3843 function.
3844
Manuel Pégourié-Gonnardafbb3102016-01-07 13:26:11 +01003845Bugfix
3846 * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three
3847 arguments where the same (in-place doubling). Found and fixed by Janos
Manuel Pégourié-Gonnard35519012016-01-07 13:06:51 +01003848 Follath. #309
Manuel Pégourié-Gonnardc9901892016-01-12 13:59:39 +00003849 * Fix potential build failures related to the 'apidoc' target, introduced
3850 in the previous patch release. Found by Robert Scheck. #390 #391
Manuel Pégourié-Gonnard35519012016-01-07 13:06:51 +01003851 * Fix issue in Makefile that prevented building using armar. #386
Antonin Décimo36e89b52019-01-23 15:24:37 +01003852 * Fix memory leak that occurred only when ECJPAKE was enabled and ECDHE and
Janos Follath4ae5c292016-02-10 11:27:43 +00003853 ECDSA was disabled in config.h . The leak didn't occur by default.
Simon Butcherf59e66b2016-03-01 20:26:16 +00003854 * Fix an issue that caused valid certificates to be rejected whenever an
3855 expired or not yet valid certificate was parsed before a valid certificate
3856 in the trusted certificate list.
Hanno Becker01a0e072017-07-26 11:49:40 +01003857 * Fix bug in mbedtls_x509_crt_parse that caused trailing extra data in the
Janos Follathcc0e49d2016-02-17 14:34:12 +00003858 buffer after DER certificates to be included in the raw representation.
Simon Butcher3f5c8752016-04-15 19:06:59 +01003859 * Fix issue that caused a hang when generating RSA keys of odd bitlength
Janos Follath1ed9f992016-03-18 11:45:44 +00003860 * Fix bug in mbedtls_rsa_rsaes_pkcs1_v15_encrypt that made null pointer
3861 dereference possible.
Janos Follath8a317052016-04-21 23:37:09 +01003862 * Fix issue that caused a crash if invalid curves were passed to
3863 mbedtls_ssl_conf_curves. #373
Simon Butcherf8935072016-04-29 00:05:32 +01003864 * Fix issue in ssl_fork_server which was preventing it from functioning. #429
Paul Bakker8f0e4c22016-05-12 16:38:27 +01003865 * Fix memory leaks in test framework
Paul Bakkerf8e37942016-05-13 10:50:41 +01003866 * Fix test in ssl-opt.sh that does not run properly with valgrind
Simon Butcher46125fb2016-06-27 19:43:55 +01003867 * Fix unchecked calls to mmbedtls_md_setup(). Fix by Brian Murray. #502
Manuel Pégourié-Gonnardafbb3102016-01-07 13:26:11 +01003868
Manuel Pégourié-Gonnard25caaf32016-01-08 14:29:11 +01003869Changes
3870 * On ARM platforms, when compiling with -O0 with GCC, Clang or armcc5,
3871 don't use the optimized assembly for bignum multiplication. This removes
3872 the need to pass -fomit-frame-pointer to avoid a build error with -O0.
Simon Butcherd7e9ad72016-04-25 16:07:12 +01003873 * Disabled SSLv3 in the default configuration.
Simon Butchera543d112016-04-26 12:51:37 +01003874 * Optimized mbedtls_mpi_zeroize() for MPI integer size. (Fix by Alexey
3875 Skalozub).
Janos Follathc6dab2b2016-05-23 14:27:02 +01003876 * Fix non-compliance server extension handling. Extensions for SSLv3 are now
3877 ignored, as required by RFC6101.
Manuel Pégourié-Gonnardf92c86e2016-01-07 13:18:01 +01003878
3879= mbed TLS 2.2.1 released 2016-01-05
3880
3881Security
Manuel Pégourié-Gonnard97b52092015-12-10 10:50:51 +01003882 * Fix potential double free when mbedtls_asn1_store_named_data() fails to
Manuel Pégourié-Gonnard1e075622015-12-10 14:46:25 +01003883 allocate memory. Only used for certificate generation, not triggerable
Simon Butcher00923c12015-12-22 19:04:24 +00003884 remotely in SSL/TLS. Found by Rafał Przywara. #367
Manuel Pégourié-Gonnardf4569b12015-11-19 09:23:06 +01003885 * Disable MD5 handshake signatures in TLS 1.2 by default to prevent the
3886 SLOTH attack on TLS 1.2 server authentication (other attacks from the
3887 SLOTH paper do not apply to any version of mbed TLS or PolarSSL).
Manuel Pégourié-Gonnard7f88b8e2016-01-04 17:36:44 +01003888 https://www.mitls.org/pages/attacks/SLOTH
Simon Butcher1285ab52016-01-01 21:42:47 +00003889
Manuel Pégourié-Gonnard7f88b8e2016-01-04 17:36:44 +01003890Bugfix
3891 * Fix over-restrictive length limit in GCM. Found by Andreas-N. #362
3892 * Fix bug in certificate validation that caused valid chains to be rejected
3893 when the first intermediate certificate has pathLenConstraint=0. Found by
3894 Nicholas Wilson. Introduced in mbed TLS 2.2.0. #280
Simon Butcher207990d2015-12-16 01:51:30 +00003895 * Removed potential leak in mbedtls_rsa_rsassa_pkcs1_v15_sign(), found by
Simon Butcher8254ed22015-11-04 11:04:00 +00003896 JayaraghavendranK. #372
Simon Butcher04799a42015-09-29 00:31:09 +01003897 * Fix suboptimal handling of unexpected records that caused interop issues
Manuel Pégourié-Gonnard2b624e92015-10-30 09:35:03 +01003898 with some peers over unreliable links. Avoid dropping an entire DTLS
Manuel Pégourié-Gonnard173c7902015-10-20 19:56:45 +02003899 datagram if a single record in a datagram is unexpected, instead only
3900 drop the record and look at subsequent records (if any are present) in
3901 the same datagram. Found by jeannotlapin. #345
Manuel Pégourié-Gonnard261faed2015-10-21 10:16:29 +02003902
3903= mbed TLS 2.2.0 released 2015-11-04
Simon Butcher59a8fa72015-11-03 23:09:28 +00003904
Manuel Pégourié-Gonnard22c3b7b2015-10-21 12:07:47 +02003905Security
3906 * Fix potential double free if mbedtls_ssl_conf_psk() is called more than
3907 once and some allocation fails. Cannot be forced remotely. Found by Guido
Simon Butcher59a8fa72015-11-03 23:09:28 +00003908 Vranken, Intelworks.
Manuel Pégourié-Gonnard2b624e92015-10-30 09:35:03 +01003909 * Fix potential heap corruption on Windows when
3910 mbedtls_x509_crt_parse_path() is passed a path longer than 2GB. Cannot be
3911 triggered remotely. Found by Guido Vranken, Intelworks.
3912 * Fix potential buffer overflow in some asn1_write_xxx() functions.
Manuel Pégourié-Gonnard1ef96c22015-10-20 15:04:57 +02003913 Cannot be triggered remotely unless you create X.509 certificates based
3914 on untrusted input or write keys of untrusted origin. Found by Guido
3915 Vranken, Intelworks.
3916 * The X509 max_pathlen constraint was not enforced on intermediate
3917 certificates. Found by Nicholas Wilson, fix and tests provided by
Manuel Pégourié-Gonnard65eefc82015-10-23 14:08:48 +02003918 Janos Follath. #280 and #319
Manuel Pégourié-Gonnard41048642015-10-09 14:47:17 +01003919
Manuel Pégourié-Gonnard2b624e92015-10-30 09:35:03 +01003920Features
3921 * Experimental support for EC J-PAKE as defined in Thread 1.0.0.
3922 Disabled by default as the specification might still change.
Manuel Pégourié-Gonnard41048642015-10-09 14:47:17 +01003923 * Added a key extraction callback to accees the master secret and key
3924 block. (Potential uses include EAP-TLS and Thread.)
Manuel Pégourié-Gonnarde5f30722015-10-22 17:01:15 +02003925
3926Bugfix
Simon Butcher62aab152015-10-27 16:05:34 +00003927 * Self-signed certificates were not excluded from pathlen counting,
3928 resulting in some valid X.509 being incorrectly rejected. Found and fix
Manuel Pégourié-Gonnard65eefc82015-10-23 14:08:48 +02003929 provided by Janos Follath. #319
3930 * Fix build error with configurations where ECDHE-PSK is the only key
3931 exchange. Found and fix provided by Chris Hammond. #270
Simon Butcher5f7c34b2015-10-27 15:14:55 +00003932 * Fix build error with configurations where RSA, RSA-PSK, ECDH-RSA or
Manuel Pégourié-Gonnard7c5fcdc2015-10-21 14:52:24 +02003933 ECHD-ECDSA if the only key exchange. Multiple reports. #310
3934 * Fixed a bug causing some handshakes to fail due to some non-fatal alerts
Manuel Pégourié-Gonnard66fc0732015-10-21 16:40:29 +02003935 not being properly ignored. Found by mancha and Kasom Koht-arsa, #308
Manuel Pégourié-Gonnardc99dffa2015-11-02 06:00:02 +09003936 * mbedtls_x509_crt_verify(_with_profile)() now also checks the key type and
3937 size/curve against the profile. Before that, there was no way to set a
3938 minimum key size for end-entity certificates with RSA keys. Found by
Simon Butcher5f7c34b2015-10-27 15:14:55 +00003939 Matthew Page of Scannex Electronics Ltd.
Manuel Pégourié-Gonnarde0b2fea2015-10-27 10:24:54 +01003940 * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
3941 Found by Kurt Danielson. #292
3942 * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
Manuel Pégourié-Gonnard41048642015-10-09 14:47:17 +01003943 * Fix bug in ASN.1 encoding of booleans that caused generated CA
3944 certificates to be rejected by some applications, including OS X
3945 Keychain. Found and fixed by Jonathan Leroy, Inikup.
Simon Butcher04799a42015-09-29 00:31:09 +01003946
Manuel Pégourié-Gonnardca056c72015-10-05 18:21:34 +01003947Changes
Simon Butcherc48b66b2015-10-05 10:18:17 +01003948 * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1
3949 or -1.
Simon Butcher5b8d1d62015-10-04 22:06:51 +01003950
3951= mbed TLS 2.1.2 released 2015-10-06
Simon Butcherc48b66b2015-10-05 10:18:17 +01003952
3953Security
Manuel Pégourié-Gonnardd02a1da2015-09-28 18:34:48 +02003954 * Added fix for CVE-2015-5291 to prevent heap corruption due to buffer
3955 overflow of the hostname or session ticket. Found by Guido Vranken,
Simon Butcherc48b66b2015-10-05 10:18:17 +01003956 Intelworks.
Manuel Pégourié-Gonnard58fb4952015-09-28 13:48:04 +02003957 * Fix potential double-free if mbedtls_ssl_set_hs_psk() is called more than
Simon Butcherc48b66b2015-10-05 10:18:17 +01003958 once in the same handhake and mbedtls_ssl_conf_psk() was used.
3959 Found and patch provided by Guido Vranken, Intelworks. Cannot be forced
3960 remotely.
3961 * Fix stack buffer overflow in pkcs12 decryption (used by
Simon Butchera45aa132015-10-05 00:26:36 +01003962 mbedtls_pk_parse_key(file)() when the password is > 129 bytes.
Simon Butcherc48b66b2015-10-05 10:18:17 +01003963 Found by Guido Vranken, Intelworks. Not triggerable remotely.
3964 * Fix potential buffer overflow in mbedtls_mpi_read_string().
3965 Found by Guido Vranken, Intelworks. Not exploitable remotely in the context
3966 of TLS, but might be in other uses. On 32 bit machines, requires reading a
3967 string of close to or larger than 1GB to exploit; on 64 bit machines, would
3968 require reading a string of close to or larger than 2^62 bytes.
Manuel Pégourié-Gonnard24417f02015-09-28 18:09:45 +02003969 * Fix potential random memory allocation in mbedtls_pem_read_buffer()
Simon Butcherfec73a82015-10-05 10:40:31 +01003970 on crafted PEM input data. Found and fix provided by Guido Vranken,
3971 Intelworks. Not triggerable remotely in TLS. Triggerable remotely if you
Manuel Pégourié-Gonnardbc1babb2015-10-02 11:16:47 +02003972 accept PEM data from an untrusted source.
3973 * Fix possible heap buffer overflow in base64_encoded() when the input
3974 buffer is 512MB or larger on 32-bit platforms. Found by Guido Vranken,
Simon Butcher475cf0a2015-10-05 11:57:54 +01003975 Intelworks. Not trigerrable remotely in TLS.
Simon Butcher04799a42015-09-29 00:31:09 +01003976 * Fix potential double-free if mbedtls_conf_psk() is called repeatedly on
Manuel Pégourié-Gonnard04317352015-10-05 12:16:06 +01003977 the same mbedtls_ssl_config object and memory allocation fails. Found by
3978 Guido Vranken, Intelworks. Cannot be forced remotely.
3979 * Fix potential heap buffer overflow in servers that perform client
Simon Butcher7776fc32015-10-05 15:44:18 +01003980 authentication against a crafted CA cert. Cannot be triggered remotely
Manuel Pégourié-Gonnard04317352015-10-05 12:16:06 +01003981 unless you allow third parties to pick trust CAs for client auth.
Simon Butcher04799a42015-09-29 00:31:09 +01003982 Found by Guido Vranken, Intelworks.
3983
3984Bugfix
Simon Butchera12e3c02015-10-01 01:59:33 +01003985 * Fix compile error in net.c with musl libc. Found and patch provided by
3986 zhasha (#278).
Simon Butcher04799a42015-09-29 00:31:09 +01003987 * Fix macroization of 'inline' keyword when building as C++. (#279)
Simon Butcher5624ec82015-09-29 01:06:06 +01003988
Manuel Pégourié-Gonnard4f3368e2015-07-19 15:01:28 +02003989Changes
Manuel Pégourié-Gonnard5f501042015-09-03 20:03:15 +02003990 * Added checking of hostname length in mbedtls_ssl_set_hostname() to ensure
3991 domain names are compliant with RFC 1035.
3992 * Fixed paths for check_config.h in example config files. (Found by bachp)
3993 (#291)
Manuel Pégourié-Gonnardc2ed8022015-09-09 12:15:13 +02003994
3995= mbed TLS 2.1.1 released 2015-09-17
Simon Butcher5b8d1d62015-10-04 22:06:51 +01003996
3997Security
Manuel Pégourié-Gonnardc2ed8022015-09-09 12:15:13 +02003998 * Add countermeasure against Lenstra's RSA-CRT attack for PKCS#1 v1.5
Simon Butchera1a11282015-09-14 21:30:40 +01003999 signatures. (Found by Florian Weimer, Red Hat.)
4000 https://securityblog.redhat.com/2015/09/02/factoring-rsa-keys-with-tls-perfect-forward-secrecy/
Manuel Pégourié-Gonnardf7022d12015-09-16 11:32:18 +02004001 * Fix possible client-side NULL pointer dereference (read) when the client
4002 tries to continue the handshake after it failed (a misuse of the API).
4003 (Found and patch provided by Fabian Foerg, Gotham Digital Science using
Simon Butcherd69f14b2015-09-11 20:00:20 +01004004 afl-fuzz.)
4005
4006Bugfix
Manuel Pégourié-Gonnard14c25742015-09-08 15:12:45 +02004007 * Fix warning when using a 64bit platform. (found by embedthis) (#275)
4008 * Fix off-by-one error in parsing Supported Point Format extension that
4009 caused some handshakes to fail.
4010
4011Changes
4012 * Made X509 profile pointer const in mbedtls_ssl_conf_cert_profile() to allow
4013 use of mbedtls_x509_crt_profile_next. (found by NWilson)
Simon Butcherd69f14b2015-09-11 20:00:20 +01004014 * When a client initiates a reconnect from the same port as a live
Manuel Pégourié-Gonnardc2ed8022015-09-09 12:15:13 +02004015 connection, if cookie verification is available
Manuel Pégourié-Gonnard5f501042015-09-03 20:03:15 +02004016 (MBEDTLS_SSL_DTLS_HELLO_VERIFY defined in config.h, and usable cookie
Manuel Pégourié-Gonnard32da9f62015-07-31 15:52:30 +02004017 callbacks set with mbedtls_ssl_conf_dtls_cookies()), this will be
Manuel Pégourié-Gonnard0a0c22e2015-09-04 14:38:26 +02004018 detected and mbedtls_ssl_read() will return
4019 MBEDTLS_ERR_SSL_CLIENT_RECONNECT - it is then possible to start a new
Manuel Pégourié-Gonnard32da9f62015-07-31 15:52:30 +02004020 handshake with the same context. (See RFC 6347 section 4.2.8.)
Manuel Pégourié-Gonnard4f3368e2015-07-19 15:01:28 +02004021
4022= mbed TLS 2.1.0 released 2015-09-04
Manuel Pégourié-Gonnardbcb04602015-07-19 16:00:04 +02004023
4024Features
Manuel Pégourié-Gonnarda6e5bd52015-07-23 12:14:13 +02004025 * Added support for yotta as a build system.
4026 * Primary open source license changed to Apache 2.0 license.
Manuel Pégourié-Gonnard52a50792015-07-27 10:36:12 +02004027
Manuel Pégourié-Gonnard6f424172015-07-24 16:53:46 +02004028Bugfix
Manuel Pégourié-Gonnard52a50792015-07-27 10:36:12 +02004029 * Fix segfault in the benchmark program when benchmarking DHM.
4030 * Fix build error with CMake and pre-4.5 versions of GCC (found by Hugo
Manuel Pégourié-Gonnarde96ce082015-07-30 22:46:55 +02004031 Leisink).
Manuel Pégourié-Gonnard20064082015-08-03 10:24:05 +02004032 * Fix bug when parsing a ServerHello without extensions (found by David
4033 Sears).
Manuel Pégourié-Gonnard99839932015-08-03 10:34:09 +02004034 * Fix bug in CMake lists that caused libmbedcrypto.a not to be installed
4035 (found by Benoit Lecocq).
Manuel Pégourié-Gonnarde33316c2015-08-07 13:17:23 +02004036 * Fix bug in Makefile that caused libmbedcrypto and libmbedx509 not to be
4037 installed (found by Rawi666).
4038 * Fix compile error with armcc 5 with --gnu option.
Manuel Pégourié-Gonnarded46c432015-08-10 10:17:32 +02004039 * Fix bug in Makefile that caused programs not to be installed correctly
Manuel Pégourié-Gonnardc98204e2015-08-11 04:21:01 +02004040 (found by robotanarchy) (#232).
4041 * Fix bug in Makefile that prevented from installing without building the
Manuel Pégourié-Gonnard1385a282015-08-27 11:30:58 +02004042 tests (found by robotanarchy) (#232).
4043 * Fix missing -static-libgcc when building shared libraries for Windows
4044 with make.
Simon Butcher52754592015-09-03 13:06:01 +01004045 * Fix link error when building shared libraries for Windows with make.
4046 * Fix error when loading libmbedtls.so.
4047 * Fix bug in mbedtls_ssl_conf_default() that caused the default preset to
4048 be always used (found by dcb314) (#235)
4049 * Fix bug in mbedtls_rsa_public() and mbedtls_rsa_private() that could
4050 result trying to unlock an unlocked mutex on invalid input (found by
4051 Fredrik Axelsson) (#257)
Manuel Pégourié-Gonnard52a50792015-07-27 10:36:12 +02004052 * Fix -Wshadow warnings (found by hnrkp) (#240)
Manuel Pégourié-Gonnard052d10c2015-07-31 11:09:59 +02004053 * Fix memory corruption on client with overlong PSK identity, around
4054 SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by
Manuel Pégourié-Gonnard32da9f62015-07-31 15:52:30 +02004055 Aleksandrs Saveljevs) (#238)
4056 * Fix unused function warning when using MBEDTLS_MDx_ALT or
4057 MBEDTLS_SHAxxx_ALT (found by Henrik) (#239)
Manuel Pégourié-Gonnardb2beb842015-09-01 19:37:32 +02004058 * Fix memory corruption in pkey programs (found by yankuncheng) (#210)
4059
4060Changes
Simon Butcher52754592015-09-03 13:06:01 +01004061 * The PEM parser now accepts a trailing space at end of lines (#226).
4062 * It is now possible to #include a user-provided configuration file at the
4063 end of the default config.h by defining MBEDTLS_USER_CONFIG_FILE on the
4064 compiler's command line.
Manuel Pégourié-Gonnard4f3368e2015-07-19 15:01:28 +02004065 * When verifying a certificate chain, if an intermediate certificate is
Paul Bakker4cb87f42015-07-10 14:09:43 +01004066 trusted, no later cert is checked. (suggested by hannes-landeholm)
Paul Bakker9c5898f2015-02-16 16:18:33 +01004067 (#220).
Manuel Pégourié-Gonnardf4acfe12014-09-17 10:56:54 +02004068 * Prepend a "thread identifier" to debug messages (issue pointed out by
Manuel Pégourié-Gonnard866eb472015-05-25 19:41:37 +02004069 Hugo Leisink) (#210).
4070 * Add mbedtls_ssl_get_max_frag_len() to query the current maximum fragment
4071 length.
4072
4073= mbed TLS 2.0.0 released 2015-07-13
4074
Manuel Pégourié-Gonnard88d37852015-06-17 14:26:49 +02004075Features
4076 * Support for DTLS 1.0 and 1.2 (RFC 6347).
4077 * Ability to override core functions from MDx, SHAx, AES and DES modules
4078 with custom implementation (eg hardware accelerated), complementing the
4079 ability to override the whole module.
4080 * New server-side implementation of session tickets that rotate keys to
Manuel Pégourié-Gonnard4d7fbbf2014-10-15 15:40:55 +02004081 preserve forward secrecy, and allows sharing across multiple contexts.
Manuel Pégourié-Gonnardf4acfe12014-09-17 10:56:54 +02004082 * Added a concept of X.509 cerificate verification profile that controls
Manuel Pégourié-Gonnarda25ffc32015-06-25 12:01:16 +02004083 which algorithms and key sizes (curves for ECDSA) are acceptable.
4084 * Expanded configurability of security parameters in the SSL module with
Manuel Pégourié-Gonnardd54e6172015-04-28 17:56:12 +02004085 mbedtls_ssl_conf_dhm_min_bitlen() and mbedtls_ssl_conf_sig_hashes().
Manuel Pégourié-Gonnard6e088f92015-05-06 17:53:08 +01004086 * Introduced a concept of presets for SSL security-relevant configuration
Manuel Pégourié-Gonnardd54e6172015-04-28 17:56:12 +02004087 parameters.
Manuel Pégourié-Gonnard6e088f92015-05-06 17:53:08 +01004088
Manuel Pégourié-Gonnard898e0aa2015-06-18 15:28:12 +02004089API Changes
Manuel Pégourié-Gonnard797f48a2015-06-18 15:45:05 +02004090 * The library has been split into libmbedcrypto, libmbedx509, libmbedtls.
4091 You now need to link to all of them if you use TLS for example.
4092 * All public identifiers moved to the mbedtls_* or MBEDTLS_* namespace.
Manuel Pégourié-Gonnardd54e6172015-04-28 17:56:12 +02004093 Some names have been further changed to make them more consistent.
Antonin Décimo36e89b52019-01-23 15:24:37 +01004094 Migration helpers scripts/rename.pl and include/mbedtls/compat-1.3.h are
Manuel Pégourié-Gonnardf4acfe12014-09-17 10:56:54 +02004095 provided. Full list of renamings in scripts/data_files/rename-1.3-2.0.txt
Manuel Pégourié-Gonnarde6bdc442014-09-17 11:34:57 +02004096 * Renamings of fields inside structures, not covered by the previous list:
Manuel Pégourié-Gonnard6963ff02015-04-28 18:02:54 +02004097 mbedtls_cipher_info_t.key_length -> key_bitlen
Manuel Pégourié-Gonnard2f84e972015-05-11 09:52:24 +02004098 mbedtls_cipher_context_t.key_length -> key_bitlen
Manuel Pégourié-Gonnard06939ce2015-05-11 11:25:46 +02004099 mbedtls_ecp_curve_info.size -> bit_size
Manuel Pégourié-Gonnard41d479e2015-04-29 00:48:22 +02004100 * Headers are now found in the 'mbedtls' directory (previously 'polarssl').
Manuel Pégourié-Gonnard6963ff02015-04-28 18:02:54 +02004101 * The following _init() functions that could return errors have
Manuel Pégourié-Gonnardc34e8dd2015-04-28 21:42:17 +02004102 been split into an _init() that returns void and another function that
Manuel Pégourié-Gonnard2f84e972015-05-11 09:52:24 +02004103 should generally be the first function called on this context after init:
4104 mbedtls_ssl_init() -> mbedtls_ssl_setup()
Manuel Pégourié-Gonnard06939ce2015-05-11 11:25:46 +02004105 mbedtls_ccm_init() -> mbedtls_ccm_setkey()
4106 mbedtls_gcm_init() -> mbedtls_gcm_setkey()
Manuel Pégourié-Gonnard96936682015-06-02 15:14:15 +01004107 mbedtls_hmac_drbg_init() -> mbedtls_hmac_drbg_seed(_buf)()
Manuel Pégourié-Gonnardcaace652015-05-11 09:57:11 +02004108 mbedtls_ctr_drbg_init() -> mbedtls_ctr_drbg_seed()
Tillmann Karras588ad502015-09-25 04:27:22 +02004109 Note that for mbedtls_ssl_setup(), you need to be done setting up the
Manuel Pégourié-Gonnardcaace652015-05-11 09:57:11 +02004110 ssl_config structure before calling it.
4111 * Most ssl_set_xxx() functions (all except ssl_set_bio(), ssl_set_hostname(),
4112 ssl_set_session() and ssl_set_client_transport_id(), plus
4113 ssl_legacy_renegotiation()) have been renamed to mbedtls_ssl_conf_xxx()
Manuel Pégourié-Gonnard9a1a4d62015-05-11 10:35:53 +02004114 (see rename.pl and compat-1.3.h above) and their first argument's type
4115 changed from ssl_context to ssl_config.
Manuel Pégourié-Gonnard96936682015-06-02 15:14:15 +01004116 * ssl_set_bio() changed signature (contexts merged, order switched, one
4117 additional callback for read-with-timeout).
Manuel Pégourié-Gonnard9a1a4d62015-05-11 10:35:53 +02004118 * The following functions have been introduced and must be used in callback
4119 implementations (SNI, PSK) instead of their *conf counterparts:
4120 mbedtls_ssl_set_hs_own_cert()
4121 mbedtls_ssl_set_hs_ca_chain()
4122 mbedtls_ssl_set_hs_psk()
Manuel Pégourié-Gonnardcaace652015-05-11 09:57:11 +02004123 * mbedtls_ssl_conf_ca_chain() lost its last argument (peer_cn), now set
Manuel Pégourié-Gonnardbc2b7712015-05-06 11:14:19 +01004124 using mbedtls_ssl_set_hostname().
Manuel Pégourié-Gonnard01e5e8c2015-05-11 10:11:56 +02004125 * mbedtls_ssl_conf_session_cache() changed prototype (only one context
Manuel Pégourié-Gonnard5cb33082015-05-06 18:06:26 +01004126 pointer, parameters reordered).
Manuel Pégourié-Gonnard866eb472015-05-25 19:41:37 +02004127 * On server, mbedtls_ssl_conf_session_tickets_cb() must now be used in
4128 place of mbedtls_ssl_conf_session_tickets() to enable session tickets.
Manuel Pégourié-Gonnardfd474232015-06-23 16:34:24 +02004129 * The SSL debug callback gained two new arguments (file name, line number).
4130 * Debug modes were removed.
Manuel Pégourié-Gonnard01e5e8c2015-05-11 10:11:56 +02004131 * mbedtls_ssl_conf_truncated_hmac() now returns void.
Manuel Pégourié-Gonnard96936682015-06-02 15:14:15 +01004132 * mbedtls_memory_buffer_alloc_init() now returns void.
Manuel Pégourié-Gonnarde6ef16f2015-05-11 19:54:43 +02004133 * X.509 verification flags are now an uint32_t. Affect the signature of:
4134 mbedtls_ssl_get_verify_result()
4135 mbedtls_x509_ctr_verify_info()
Manuel Pégourié-Gonnard96936682015-06-02 15:14:15 +01004136 mbedtls_x509_crt_verify() (flags, f_vrfy -> needs to be updated)
Manuel Pégourié-Gonnarde6ef16f2015-05-11 19:54:43 +02004137 mbedtls_ssl_conf_verify() (f_vrfy -> needs to be updated)
Manuel Pégourié-Gonnardbc6ff232015-06-02 16:33:08 +01004138 * The following functions changed prototype to avoid an in-out length
4139 parameter:
4140 mbedtls_base64_encode()
4141 mbedtls_base64_decode()
4142 mbedtls_mpi_write_string()
4143 mbedtls_dhm_calc_secret()
Manuel Pégourié-Gonnard91895852015-06-30 13:34:45 +02004144 * In the NET module, all "int" and "int *" arguments for file descriptors
4145 changed type to "mbedtls_net_context *".
Manuel Pégourié-Gonnard0b104b02015-05-14 21:52:40 +02004146 * net_accept() gained new arguments for the size of the client_ip buffer.
Manuel Pégourié-Gonnard8f5fd312015-04-24 14:42:34 +02004147 * In the threading layer, mbedtls_mutex_init() and mbedtls_mutex_free() now
4148 return void.
Antonin Décimo36e89b52019-01-23 15:24:37 +01004149 * ecdsa_write_signature() gained an additional md_alg argument and
Manuel Pégourié-Gonnarddfdcac92015-03-31 11:41:42 +02004150 ecdsa_write_signature_det() was deprecated.
Manuel Pégourié-Gonnardb8cfe3f2015-03-31 11:04:45 +02004151 * pk_sign() no longer accepts md_alg == POLARSSL_MD_NONE with ECDSA.
Manuel Pégourié-Gonnard1cd10ad2015-06-23 11:07:37 +02004152 * Last argument of x509_crt_check_key_usage() and
4153 mbedtls_x509write_crt_set_key_usage() changed from int to unsigned.
Manuel Pégourié-Gonnarda958d692015-03-27 10:23:53 +01004154 * test_ca_list (from certs.h) is renamed to test_cas_pem and is only
4155 available if POLARSSL_PEM_PARSE_C is defined (it never worked without).
4156 * Test certificates in certs.c are no longer guaranteed to be nul-terminated
Manuel Pégourié-Gonnard75f90102015-03-27 09:56:18 +01004157 strings; use the new *_len variables instead of strlen().
Manuel Pégourié-Gonnard43b37cb2015-05-12 11:20:10 +02004158 * Functions mbedtls_x509_xxx_parse(), mbedtls_pk_parse_key(),
4159 mbedtls_pk_parse_public_key() and mbedtls_dhm_parse_dhm() now expect the
4160 length parameter to include the terminating null byte for PEM input.
Manuel Pégourié-Gonnard35f1d7f2015-03-19 12:42:40 +00004161 * Signature of mpi_mul_mpi() changed to make the last argument unsigned
Manuel Pégourié-Gonnard5b9e5b12015-05-26 17:46:09 +02004162 * calloc() is now used instead of malloc() everywhere. API of platform
4163 layer and the memory_buffer_alloc module changed accordingly.
Manuel Pégourié-Gonnard1b8de572015-05-27 16:49:37 +02004164 (Thanks to Mansour Moufid for helping with the replacement.)
Manuel Pégourié-Gonnard88bdb0b2015-03-10 14:02:33 +00004165 * Change SSL_DISABLE_RENEGOTIATION config.h flag to SSL_RENEGOTIATION
4166 (support for renegotiation now needs explicit enabling in config.h).
Manuel Pégourié-Gonnard60c793b2015-06-18 20:52:58 +02004167 * Split MBEDTLS_HAVE_TIME into MBEDTLS_HAVE_TIME and MBEDTLS_HAVE_TIME_DATE
4168 in config.h
Manuel Pégourié-Gonnardf4acfe12014-09-17 10:56:54 +02004169 * net_connect() and net_bind() have a new 'proto' argument to choose
4170 between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP.
Manuel Pégourié-Gonnardc0d74942015-06-23 12:30:57 +02004171 Their 'port' argument type is changed to a string.
Manuel Pégourié-Gonnardd54e6172015-04-28 17:56:12 +02004172 * Some constness fixes
4173
4174Removals
Manuel Pégourié-Gonnardaff37e52015-05-11 18:11:57 +02004175 * Removed mbedtls_ecp_group_read_string(). Only named groups are supported.
Manuel Pégourié-Gonnard56cc88a2015-05-11 18:40:45 +02004176 * Removed mbedtls_ecp_sub() and mbedtls_ecp_add(), use
4177 mbedtls_ecp_muladd().
Manuel Pégourié-Gonnard41b9c2b2015-05-28 14:56:20 +02004178 * Removed individual mdX_hmac, shaX_hmac, mdX_file and shaX_file functions
4179 (use generic functions from md.h)
4180 * Removed mbedtls_timing_msleep(). Use mbedtls_net_usleep() or a custom
Manuel Pégourié-Gonnarda63bc942015-05-14 18:22:47 +02004181 waiting function.
Manuel Pégourié-Gonnard53585ee2015-06-25 08:52:25 +02004182 * Removed test DHM parameters from the test certs module.
Manuel Pégourié-Gonnardd54e6172015-04-28 17:56:12 +02004183 * Removed the PBKDF2 module (use PKCS5).
4184 * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()).
4185 * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3).
4186 * Removed openssl.h (very partial OpenSSL compatibility layer).
4187 * Configuration options POLARSSL_HAVE_LONGLONG was removed (now always on).
4188 * Configuration options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 have
4189 been removed (compiler is required to support 32-bit operations).
4190 * Configuration option POLARSSL_HAVE_IPV6 was removed (always enabled).
4191 * Removed test program o_p_test, the script compat.sh does more.
4192 * Removed test program ssl_test, superseded by ssl-opt.sh.
4193 * Removed helper script active-config.pl
Manuel Pégourié-Gonnard1022fed2015-03-27 16:30:47 +01004194
4195New deprecations
4196 * md_init_ctx() is deprecated in favour of md_setup(), that adds a third
4197 argument (allowing memory savings if HMAC is not used)
Manuel Pégourié-Gonnardf4acfe12014-09-17 10:56:54 +02004198
Manuel Pégourié-Gonnard1022fed2015-03-27 16:30:47 +01004199Semi-API changes (technically public, morally private)
Manuel Pégourié-Gonnard50518f42015-05-26 11:04:15 +02004200 * Renamed a few headers to include _internal in the name. Those headers are
4201 not supposed to be included by users.
Manuel Pégourié-Gonnardc89d6cf2015-03-31 14:43:19 +02004202 * Changed md_info_t into an opaque structure (use md_get_xxx() accessors).
4203 * Changed pk_info_t into an opaque structure.
Manuel Pégourié-Gonnard50518f42015-05-26 11:04:15 +02004204 * Changed cipher_base_t into an opaque structure.
4205 * Removed sig_oid2 and rename sig_oid1 to sig_oid in x509_crt and x509_crl.
Manuel Pégourié-Gonnard1d0ca1a2015-03-27 16:50:00 +01004206 * x509_crt.key_usage changed from unsigned char to unsigned int.
Manuel Pégourié-Gonnard50518f42015-05-26 11:04:15 +02004207 * Removed r and s from ecdsa_context
4208 * Removed mode from des_context and des3_context
Manuel Pégourié-Gonnard1022fed2015-03-27 16:30:47 +01004209
Manuel Pégourié-Gonnard606df8c2015-03-27 17:13:17 +01004210Default behavior changes
Manuel Pégourié-Gonnard8c8be1e2015-03-31 14:21:11 +02004211 * The default minimum TLS version is now TLS 1.0.
Manuel Pégourié-Gonnard606df8c2015-03-27 17:13:17 +01004212 * RC4 is now blacklisted by default in the SSL/TLS layer, and excluded from the
4213 default ciphersuite list returned by ssl_list_ciphersuites()
Manuel Pégourié-Gonnard88bdb0b2015-03-10 14:02:33 +00004214 * Support for receiving SSLv2 ClientHello is now disabled by default at
4215 compile time.
Manuel Pégourié-Gonnardfa44f202015-03-27 17:52:25 +01004216 * The default authmode for SSL/TLS clients is now REQUIRED.
Manuel Pégourié-Gonnard348bcb32015-03-31 14:01:33 +02004217 * Support for RSA_ALT contexts in the PK layer is now optional. Since is is
4218 enabled in the default configuration, this is only noticeable if using a
4219 custom config.h
Manuel Pégourié-Gonnard1028b742015-05-06 17:33:07 +01004220 * Default DHM parameters server-side upgraded from 1024 to 2048 bits.
Manuel Pégourié-Gonnard88d37852015-06-17 14:26:49 +02004221 * A minimum RSA key size of 2048 bits is now enforced during ceritificate
4222 chain verification.
Manuel Pégourié-Gonnard662c6e82015-05-06 17:39:23 +01004223 * Negotiation of truncated HMAC is now disabled by default on server too.
Manuel Pégourié-Gonnardcb46fd82015-05-28 17:06:07 +02004224 * The following functions are now case-sensitive:
4225 mbedtls_cipher_info_from_string()
4226 mbedtls_ecp_curve_info_from_name()
4227 mbedtls_md_info_from_string()
4228 mbedtls_ssl_ciphersuite_from_string()
4229 mbedtls_version_check_feature()
Manuel Pégourié-Gonnard606df8c2015-03-27 17:13:17 +01004230
Manuel Pégourié-Gonnardaff37e52015-05-11 18:11:57 +02004231Requirement changes
Manuel Pégourié-Gonnardab229102015-04-15 11:53:16 +02004232 * The minimum MSVC version required is now 2010 (better C99 support).
Manuel Pégourié-Gonnardd4f04db2015-05-14 18:58:17 +02004233 * The NET layer now unconditionnaly relies on getaddrinfo() and select().
Manuel Pégourié-Gonnard3a3ae3d2015-05-06 17:08:54 +01004234 * Compiler is required to support C99 types such as long long and uint32_t.
Manuel Pégourié-Gonnard88bdb0b2015-03-10 14:02:33 +00004235
Manuel Pégourié-Gonnard01e5e8c2015-05-11 10:11:56 +02004236API changes from the 1.4 preview branch
Manuel Pégourié-Gonnard1b511f92015-05-06 15:54:23 +01004237 * ssl_set_bio_timeout() was removed, split into mbedtls_ssl_set_bio() with
4238 new prototype, and mbedtls_ssl_set_read_timeout().
Manuel Pégourié-Gonnard01e5e8c2015-05-11 10:11:56 +02004239 * The following functions now return void:
4240 mbedtls_ssl_conf_transport()
4241 mbedtls_ssl_conf_max_version()
4242 mbedtls_ssl_conf_min_version()
Manuel Pégourié-Gonnard0c890352015-05-13 10:28:41 +02004243 * DTLS no longer hard-depends on TIMING_C, but uses a callback interface
4244 instead, see mbedtls_ssl_set_timer_cb(), with the Timing module providing
4245 an example implementation, see mbedtls_timing_delay_context and
4246 mbedtls_timing_set/get_delay().
Manuel Pégourié-Gonnardabc729e2015-07-01 01:28:24 +02004247 * With UDP sockets, it is no longer necessary to call net_bind() again
4248 after a successful net_accept().
Manuel Pégourié-Gonnard1b511f92015-05-06 15:54:23 +01004249
Manuel Pégourié-Gonnard0a4fb092015-05-07 12:50:31 +01004250Changes
4251 * mbedtls_ctr_drbg_random() and mbedtls_hmac_drbg_random() are now
4252 thread-safe if MBEDTLS_THREADING_C is enabled.
Manuel Pégourié-Gonnard88d37852015-06-17 14:26:49 +02004253 * Reduced ROM fooprint of SHA-256 and added an option to reduce it even
4254 more (at the expense of performance) MBEDTLS_SHA256_SMALLER.
Manuel Pégourié-Gonnard0a4fb092015-05-07 12:50:31 +01004255
Manuel Pégourié-Gonnard7bf19762015-02-10 10:09:37 +00004256= mbed TLS 1.3 branch
4257
4258Security
Manuel Pégourié-Gonnard9f982512015-04-17 16:55:53 +02004259 * With authmode set to SSL_VERIFY_OPTIONAL, verification of keyUsage and
Manuel Pégourié-Gonnarde6efa6f2015-04-20 11:01:48 +01004260 extendedKeyUsage on the leaf certificate was lost (results not accessible
4261 via ssl_get_verify_results()).
Manuel Pégourié-Gonnard47fede02015-04-29 01:35:48 +02004262 * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
4263 https://dl.acm.org/citation.cfm?id=2714625
Manuel Pégourié-Gonnard7bf19762015-02-10 10:09:37 +00004264
4265Features
Manuel Pégourié-Gonnard154b00b2015-05-11 21:05:36 +02004266 * Improve ECC performance by using more efficient doubling formulas
4267 (contributed by Peter Dettman).
Manuel Pégourié-Gonnard39a183a2015-04-17 16:14:32 +02004268 * Add x509_crt_verify_info() to display certificate verification results.
Manuel Pégourié-Gonnard95f00892015-04-15 14:12:05 +02004269 * Add support for reading DH parameters with privateValueLength included
Manuel Pégourié-Gonnardba334202015-04-17 16:16:52 +02004270 (contributed by Daniel Kahn Gillmor).
Manuel Pégourié-Gonnard39ead3e2015-03-27 13:09:21 +01004271 * Add support for bit strings in X.509 names (request by Fredrik Axelsson).
4272 * Add support for id-at-uniqueIdentifier in X.509 names.
Manuel Pégourié-Gonnard00c22012015-02-13 15:14:10 +00004273 * Add support for overriding snprintf() (except on Windows) and exit() in
4274 the platform layer.
4275 * Add an option to use macros instead of function pointers in the platform
4276 layer (helps get rid of unwanted references).
Manuel Pégourié-Gonnardea0184b2015-02-16 15:42:16 +00004277 * Improved Makefiles for Windows targets by fixing library targets and making
4278 cross-compilation easier (thanks to Alon Bar-Lev).
Manuel Pégourié-Gonnardad350ed2015-02-16 17:45:35 +00004279 * The benchmark program also prints heap usage for public-key primitives
4280 if POLARSSL_MEMORY_BUFFER_ALLOC_C and POLARSSL_MEMORY_DEBUG are defined.
4281 * New script ecc-heap.sh helps measuring the impact of ECC parameters on
4282 speed and RAM (heap only for now) usage.
4283 * New script memory.sh helps measuring the ROM and RAM requirements of two
4284 reduced configurations (PSK-CCM and NSA suite B).
Manuel Pégourié-Gonnard8c3f0f42015-04-09 14:10:26 +02004285 * Add config flag POLARSSL_DEPRECATED_WARNING (off by default) to produce
Manuel Pégourié-Gonnardf7dbedb2015-03-23 14:20:04 +01004286 warnings on use of deprecated functions (with GCC and Clang only).
Manuel Pégourié-Gonnard8c3f0f42015-04-09 14:10:26 +02004287 * Add config flag POLARSSL_DEPRECATED_REMOVED (off by default) to produce
Manuel Pégourié-Gonnardf7dbedb2015-03-23 14:20:04 +01004288 errors on use of deprecated functions.
Manuel Pégourié-Gonnard7bf19762015-02-10 10:09:37 +00004289
4290Bugfix
Manuel Pégourié-Gonnarddccb80b2015-06-03 10:20:33 +01004291 * Fix compile errors with PLATFORM_NO_STD_FUNCTIONS.
Manuel Pégourié-Gonnardf2ec5052015-06-03 09:50:07 +01004292 * Fix compile error with PLATFORM_EXIT_ALT (thanks to Rafał Przywara).
Manuel Pégourié-Gonnard3e87a9f2015-06-03 09:48:26 +01004293 * Fix bug in entropy.c when THREADING_C is also enabled that caused
4294 entropy_free() to crash (thanks to Rafał Przywara).
Manuel Pégourié-Gonnard2a1524c2015-05-27 17:59:46 +02004295 * Fix memory leak when gcm_setkey() and ccm_setkey() are used more than
4296 once on the same context.
Manuel Pégourié-Gonnardfa950c92015-04-30 12:50:22 +02004297 * Fix bug in ssl_mail_client when password is longer that username (found
4298 by Bruno Pape).
Manuel Pégourié-Gonnard159c5242015-04-30 11:15:22 +02004299 * Fix undefined behaviour (memcmp( NULL, NULL, 0 );) in X.509 modules
4300 (detected by Clang's 3.6 UBSan).
Manuel Pégourié-Gonnard770b5e12015-04-29 17:02:01 +02004301 * mpi_size() and mpi_msb() would segfault when called on an mpi that is
4302 initialized but not set (found by pravic).
Manuel Pégourié-Gonnardd97828e2015-04-29 14:03:28 +02004303 * Fix detection of support for getrandom() on Linux (reported by syzzer) by
4304 doing it at runtime (using uname) rather that compile time.
Manuel Pégourié-Gonnardf5203e02015-04-29 09:58:00 +02004305 * Fix handling of symlinks by "make install" (found by Gaël PORTAY).
Manuel Pégourié-Gonnarda2fce212015-04-15 19:09:03 +02004306 * Fix potential NULL pointer dereference (not trigerrable remotely) when
4307 ssl_write() is called before the handshake is finished (introduced in
4308 1.3.10) (first reported by Martin Blumenstingl).
Manuel Pégourié-Gonnard924cd102015-04-14 11:18:04 +02004309 * Fix bug in pk_parse_key() that caused some valid private EC keys to be
4310 rejected.
Manuel Pégourié-Gonnardcf201202015-04-02 10:46:55 +01004311 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
Manuel Pégourié-Gonnard88fca3e2015-03-27 15:06:07 +01004312 * Fix thread safety bug in RSA operations (found by Fredrik Axelsson).
Manuel Pégourié-Gonnard38433532015-02-11 11:35:58 +00004313 * Fix hardclock() (only used in the benchmarking program) with some
4314 versions of mingw64 (found by kxjhlele).
Manuel Pégourié-Gonnarddda52132015-02-11 11:36:31 +00004315 * Fix warnings from mingw64 in timing.c (found by kxjklele).
Manuel Pégourié-Gonnard6fdc4ca2015-02-13 17:15:18 +00004316 * Fix potential unintended sign extension in asn1_get_len() on 64-bit
4317 platforms.
Manuel Pégourié-Gonnarddf4e4402015-02-18 10:11:06 +00004318 * Fix potential memory leak in ssl_set_psk() (found by Mansour Moufid).
Manuel Pégourié-Gonnard51bccd32015-03-10 16:09:08 +00004319 * Fix compile error when POLARSSL_SSL_DISABLE_RENEGOTATION and
4320 POLARSSL_SSL_SSESSION_TICKETS where both enabled in config.h (introduced
4321 in 1.3.10).
Manuel Pégourié-Gonnard1a901472015-03-10 16:12:29 +00004322 * Add missing extern "C" guard in aesni.h (reported by amir zamani).
Manuel Pégourié-Gonnard0878a0d2015-03-31 15:13:29 +02004323 * Add missing dependency on SHA-256 in some x509 programs (reported by
4324 Gergely Budai).
Manuel Pégourié-Gonnard07ec1dd2015-04-03 17:26:50 +02004325 * Fix bug related to ssl_set_curves(): the client didn't check that the
4326 curve picked by the server was actually allowed.
Manuel Pégourié-Gonnard7bf19762015-02-10 10:09:37 +00004327
4328Changes
Manuel Pégourié-Gonnard12a8b662015-04-15 14:20:14 +02004329 * Remove bias in mpi_gen_prime (contributed by Pascal Junod).
4330 * Remove potential sources of timing variations (some contributed by Pascal
4331 Junod).
Manuel Pégourié-Gonnard23ce09b2015-04-09 14:51:51 +02004332 * Options POLARSSL_HAVE_INT8 and POLARSSL_HAVE_INT16 are deprecated.
Manuel Pégourié-Gonnarda98af5e2015-04-09 14:40:46 +02004333 * Enabling POLARSSL_NET_C without POLARSSL_HAVE_IPV6 is deprecated.
Manuel Pégourié-Gonnard8c3f0f42015-04-09 14:10:26 +02004334 * compat-1.2.h and openssl.h are deprecated.
Manuel Pégourié-Gonnard0645bfa2015-04-15 11:14:22 +02004335 * Adjusting/overriding CFLAGS and LDFLAGS with the make build system is now
Manuel Pégourié-Gonnard40f315a2015-03-13 13:49:26 +00004336 more flexible (warning: OFLAGS is not used any more) (see the README)
4337 (contributed by Alon Bar-Lev).
Manuel Pégourié-Gonnard0645bfa2015-04-15 11:14:22 +02004338 * ssl_set_own_cert() no longer calls pk_check_pair() since the
Manuel Pégourié-Gonnardf427f882015-03-10 15:35:29 +00004339 performance impact was bad for some users (this was introduced in 1.3.10).
Manuel Pégourié-Gonnard6f60cd82015-02-10 10:47:03 +00004340 * Move from SHA-1 to SHA-256 in example programs using signatures
4341 (suggested by Thorsten Mühlfelder).
Manuel Pégourié-Gonnard677af932015-02-10 11:41:57 +00004342 * Remove some unneeded inclusions of header files from the standard library
4343 "minimize" others (eg use stddef.h if only size_t is needed).
4344 * Change #include lines in test files to use double quotes instead of angle
4345 brackets for uniformity with the rest of the code.
Manuel Pégourié-Gonnard00c22012015-02-13 15:14:10 +00004346 * Remove dependency on sscanf() in X.509 parsing modules.
Manuel Pégourié-Gonnard178f9d62014-10-20 14:56:56 +02004347
Paul Bakkerdaae3b72015-02-08 15:49:54 +01004348= mbed TLS 1.3.10 released 2015-02-09
Manuel Pégourié-Gonnard547ff662014-11-26 15:42:16 +01004349Security
4350 * NULL pointer dereference in the buffer-based allocator when the buffer is
Manuel Pégourié-Gonnardee7d5992015-01-28 14:02:38 +00004351 full and polarssl_free() is called (found by Mark Hasemeyer)
Manuel Pégourié-Gonnard547ff662014-11-26 15:42:16 +01004352 (only possible if POLARSSL_MEMORY_BUFFER_ALLOC_C is enabled, which it is
4353 not by default).
Manuel Pégourié-Gonnard0369a522014-11-11 22:17:26 +01004354 * Fix remotely-triggerable uninitialised pointer dereference caused by
Manuel Pégourié-Gonnardd6814432014-11-12 01:25:31 +01004355 crafted X.509 certificate (TLS server is not affected if it doesn't ask for a
Manuel Pégourié-Gonnard0369a522014-11-11 22:17:26 +01004356 client certificate) (found using Codenomicon Defensics).
Manuel Pégourié-Gonnardb1340602014-11-11 23:11:16 +01004357 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
Manuel Pégourié-Gonnardd6814432014-11-12 01:25:31 +01004358 (TLS server is not affected if it doesn't ask for a client certificate)
4359 (found using Codenomicon Defensics).
4360 * Fix potential stack overflow while parsing crafted X.509 certificates
4361 (TLS server is not affected if it doesn't ask for a client certificate)
Manuel Pégourié-Gonnardb1340602014-11-11 23:11:16 +01004362 (found using Codenomicon Defensics).
Manuel Pégourié-Gonnard6674cce2015-02-06 10:30:58 +00004363 * Fix timing difference that could theoretically lead to a
4364 Bleichenbacher-style attack in the RSA and RSA-PSK key exchanges
4365 (reported by Sebastian Schinzel).
Manuel Pégourié-Gonnard0369a522014-11-11 22:17:26 +01004366
Manuel Pégourié-Gonnardde171252014-11-08 17:58:24 +01004367Features
Manuel Pégourié-Gonnardd1a878c2015-01-14 16:59:23 +01004368 * Add support for FALLBACK_SCSV (draft-ietf-tls-downgrade-scsv).
4369 * Add support for Extended Master Secret (draft-ietf-tls-session-hash).
4370 * Add support for Encrypt-then-MAC (RFC 7366).
Manuel Pégourié-Gonnardde171252014-11-08 17:58:24 +01004371 * Add function pk_check_pair() to test if public and private keys match.
Manuel Pégourié-Gonnard426d4ae2014-11-19 16:58:28 +01004372 * Add x509_crl_parse_der().
Manuel Pégourié-Gonnardfd6c85c2014-11-20 16:34:20 +01004373 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
4374 length of an X.509 verification chain.
Manuel Pégourié-Gonnardfa423882014-11-04 19:57:55 +01004375 * Support for renegotiation can now be disabled at compile-time
Manuel Pégourié-Gonnard3ff78232015-01-08 11:15:09 +01004376 * Support for 1/n-1 record splitting, a countermeasure against BEAST.
Paul Bakker6152b022015-04-14 15:00:09 +02004377 * Certificate selection based on signature hash, preferring SHA-1 over SHA-2
Manuel Pégourié-Gonnarddf331a52015-01-08 16:43:07 +01004378 for pre-1.2 clients when multiple certificates are available.
Manuel Pégourié-Gonnard18292452015-01-09 14:34:13 +01004379 * Add support for getrandom() syscall on recent Linux kernels with Glibc or
4380 a compatible enough libc (eg uClibc).
Manuel Pégourié-Gonnardd1a878c2015-01-14 16:59:23 +01004381 * Add ssl_set_arc4_support() to make it easier to disable RC4 at runtime
Manuel Pégourié-Gonnardbd47a582015-01-12 13:43:29 +01004382 while using the default ciphersuite list.
Manuel Pégourié-Gonnard607d6632015-01-26 11:17:20 +00004383 * Added new error codes and debug messages about selection of
4384 ciphersuite/certificate.
Manuel Pégourié-Gonnard547ff662014-11-26 15:42:16 +01004385
Manuel Pégourié-Gonnard5cb4b312014-11-25 17:41:50 +01004386Bugfix
4387 * Stack buffer overflow if ctr_drbg_update() is called with too large
4388 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
Manuel Pégourié-Gonnard5dd28ea2014-11-27 13:57:42 +01004389 * Possible buffer overflow of length at most POLARSSL_MEMORY_ALIGN_MULTIPLE
4390 if memory_buffer_alloc_init() was called with buf not aligned and len not
Manuel Pégourié-Gonnardd1a878c2015-01-14 16:59:23 +01004391 a multiple of POLARSSL_MEMORY_ALIGN_MULTIPLE (not triggerable remotely).
4392 * User set CFLAGS were ignored by Cmake with gcc (introduced in 1.3.9, found
Manuel Pégourié-Gonnard54f6e562014-11-10 12:15:39 +01004393 by Julian Ospald).
Manuel Pégourié-Gonnardb31b61b2014-11-10 13:05:43 +01004394 * Fix potential undefined behaviour in Camellia.
Manuel Pégourié-Gonnarde9599792014-11-10 13:43:55 +01004395 * Fix potential failure in ECDSA signatures when POLARSSL_ECP_MAX_BITS is a
4396 multiple of 8 (found by Gergely Budai).
Manuel Pégourié-Gonnardacdb9b92015-01-23 17:50:34 +00004397 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
4398 Peter Vaskovic).
Manuel Pégourié-Gonnard9d7fc162015-01-19 17:16:54 +00004399 * Fix assembly selection for MIPS64 (thanks to James Cowgill).
Manuel Pégourié-Gonnarde89163c2015-01-23 14:30:57 +00004400 * ssl_get_verify_result() now works even if the handshake was aborted due
4401 to a failed verification (found by Fredrik Axelsson).
Manuel Pégourié-Gonnardf3046ef2015-01-28 14:13:30 +00004402 * Skip writing and parsing signature_algorithm extension if none of the
4403 key exchanges enabled needs certificates. This fixes a possible interop
4404 issue with some servers when a zero-length extension was sent. (Reported
4405 by Peter Dettman.)
Manuel Pégourié-Gonnardaa422b22015-02-02 09:30:45 +00004406 * On a 0-length input, base64_encode() did not correctly set output length
4407 (found by Hendrik van den Boogaard).
Manuel Pégourié-Gonnard54f6e562014-11-10 12:15:39 +01004408
Manuel Pégourié-Gonnardd056ce02014-10-29 22:29:20 +01004409Changes
4410 * Use deterministic nonces for AEAD ciphers in TLS by default (possible to
4411 switch back to random with POLARSSL_SSL_AEAD_RANDOM_IV in config.h).
Manuel Pégourié-Gonnarde10e06d2014-11-06 18:15:12 +01004412 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
Manuel Pégourié-Gonnardde171252014-11-08 17:58:24 +01004413 * ssl_set_own_cert() now returns an error on key-certificate mismatch.
Manuel Pégourié-Gonnard8a5e3d42014-11-12 17:47:28 +01004414 * Forbid repeated extensions in X.509 certificates.
Manuel Pégourié-Gonnard8c9223d2014-11-19 10:17:21 +01004415 * debug_print_buf() now prints a text view in addition to hexadecimal.
Manuel Pégourié-Gonnardf01768c2015-01-08 17:06:16 +01004416 * A specific error is now returned when there are ciphersuites in common
4417 but none of them is usable due to external factors such as no certificate
Paul Bakkere522d0f2015-01-14 16:12:48 +01004418 with a suitable (extended)KeyUsage or curve or no PSK set.
Manuel Pégourié-Gonnardd1a878c2015-01-14 16:59:23 +01004419 * It is now possible to disable negotiation of truncated HMAC server-side
Manuel Pégourié-Gonnarde117a8f2015-01-09 12:39:35 +01004420 at runtime with ssl_set_truncated_hmac().
Paul Bakker5b8f7ea2015-01-14 16:26:54 +01004421 * Example programs for SSL client and server now disable SSLv3 by default.
4422 * Example programs for SSL client and server now disable RC4 by default.
Manuel Pégourié-Gonnardc9e04832015-01-19 16:24:23 +00004423 * Use platform.h in all test suites and programs.
Manuel Pégourié-Gonnard5cb4b312014-11-25 17:41:50 +01004424
Paul Bakker9eac4f72014-10-20 13:56:15 +02004425= PolarSSL 1.3.9 released 2014-10-20
Manuel Pégourié-Gonnard480905d2014-08-21 19:38:32 +02004426Security
4427 * Lowest common hash was selected from signature_algorithms extension in
4428 TLS 1.2 (found by Darren Bane) (introduced in 1.3.8).
Manuel Pégourié-Gonnard5d861852014-10-17 12:41:41 +02004429 * Remotely-triggerable memory leak when parsing some X.509 certificates
Paul Bakkerb082bb52014-10-20 13:37:51 +02004430 (server is not affected if it doesn't ask for a client certificate)
4431 (found using Codenomicon Defensics).
Manuel Pégourié-Gonnard43c3b282014-10-17 12:42:11 +02004432 * Remotely-triggerable memory leak when parsing crafted ClientHello
Paul Bakkerb082bb52014-10-20 13:37:51 +02004433 (not affected if ECC support was compiled out) (found using Codenomicon
4434 Defensics).
Manuel Pégourié-Gonnard480905d2014-08-21 19:38:32 +02004435
Paul Bakker8dcb2d72014-08-08 12:22:30 +02004436Bugfix
4437 * Support escaping of commas in x509_string_to_names()
Manuel Pégourié-Gonnard955028f2014-07-12 01:27:34 +02004438 * Fix compile error in ssl_pthread_server (found by Julian Ospald).
Manuel Pégourié-Gonnard9a6b4422014-07-21 13:42:54 +02004439 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
Manuel Pégourié-Gonnard42cc6412014-07-21 13:55:54 +02004440 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
Manuel Pégourié-Gonnard868c0ee2014-07-21 14:18:17 +02004441 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
Manuel Pégourié-Gonnard462906f2014-07-21 17:37:01 +02004442 * Fix compile error in timing.c when POLARSSL_NET_C and POLARSSL_SELFTEST
4443 are defined but not POLARSSL_HAVE_TIME (found by Stephane Di Vito).
Manuel Pégourié-Gonnarddca108e2014-07-21 18:15:22 +02004444 * Remove non-existent file from VS projects (found by Peter Vaskovic).
Manuel Pégourié-Gonnardf26a1e82014-08-19 12:28:50 +02004445 * ssl_read() could return non-application data records on server while
4446 renegotation was pending, and on client when a HelloRequest was received.
Manuel Pégourié-Gonnardf07f4212014-08-15 19:04:47 +02004447 * Server-initiated renegotiation would fail with non-blocking I/O if the
4448 write callback returned WANT_WRITE when requesting renegotiation.
Manuel Pégourié-Gonnarda13500f2014-08-19 16:14:04 +02004449 * ssl_close_notify() could send more than one message in some circumstances
4450 with non-blocking I/O.
Sander Niemeijeref5087d2014-08-16 12:45:52 +02004451 * Fix compiler warnings on iOS (found by Sander Niemeijer).
Paul Bakker5a5fa922014-09-26 14:53:04 +02004452 * x509_crt_parse() did not increase total_failed on PEM error
Manuel Pégourié-Gonnard7f4ed672014-10-14 20:56:02 +02004453 * Fix compile error with armcc in mpi_is_prime()
Manuel Pégourié-Gonnardf7cdbc02014-10-17 17:02:10 +02004454 * Fix potential bad read in parsing ServerHello (found by Adrien
4455 Vialletelle).
Paul Bakker8dcb2d72014-08-08 12:22:30 +02004456
Manuel Pégourié-Gonnard8d4ad072014-07-13 14:43:28 +02004457Changes
4458 * Ciphersuites using SHA-256 or SHA-384 now require TLS 1.x (there is no
4459 standard defining how to use SHA-2 with SSL 3.0).
Manuel Pégourié-Gonnarda04fa4f2014-07-13 16:16:44 +02004460 * Ciphersuites using RSA-PSK key exchange new require TLS 1.x (the spec is
4461 ambiguous on how to encode some packets with SSL 3.0).
Manuel Pégourié-Gonnard192253a2014-07-21 16:37:15 +02004462 * Made buffer size in pk_write_(pub)key_pem() more dynamic, eg smaller if
4463 RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger.
Manuel Pégourié-Gonnardf26a1e82014-08-19 12:28:50 +02004464 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
4465 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
Manuel Pégourié-Gonnardda1b4de2014-09-08 17:03:50 +02004466 * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits
4467 RSA keys.
Manuel Pégourié-Gonnard64938c62014-10-15 21:45:39 +02004468 * Accept spaces at end of line or end of buffer in base64_decode().
Manuel Pégourié-Gonnard5d861852014-10-17 12:41:41 +02004469 * X.509 certificates with more than one AttributeTypeAndValue per
4470 RelativeDistinguishedName are not accepted any more.
Manuel Pégourié-Gonnard8d4ad072014-07-13 14:43:28 +02004471
Paul Bakker1910aa72014-07-11 11:28:56 +02004472= PolarSSL 1.3.8 released 2014-07-11
Manuel Pégourié-Gonnard0bcc4e12014-06-17 10:54:17 +02004473Security
4474 * Fix length checking for AEAD ciphersuites (found by Codenomicon).
4475 It was possible to crash the server (and client) using crafted messages
4476 when a GCM suite was chosen.
4477
Paul Bakkerc6ece492014-05-22 15:45:03 +02004478Features
4479 * Add CCM module and cipher mode to Cipher Layer
4480 * Support for CCM and CCM_8 ciphersuites
Manuel Pégourié-Gonnardb4798712014-06-06 18:10:44 +02004481 * Support for parsing and verifying RSASSA-PSS signatures in the X.509
4482 modules (certificates, CRLs and CSRs).
Manuel Pégourié-Gonnard398c57b2014-06-23 12:10:59 +02004483 * Blowfish in the cipher layer now supports variable length keys.
Manuel Pégourié-Gonnard35795222014-06-24 17:33:54 +02004484 * Add example config.h for PSK with CCM, optimized for low RAM usage.
4485 * Optimize for RAM usage in example config.h for NSA Suite B profile.
Manuel Pégourié-Gonnard01edb102014-06-24 22:42:34 +02004486 * Add POLARSSL_REMOVE_ARC4_CIPHERSUITES to allow removing RC4 ciphersuites
4487 from the default list (inactive by default).
Paul Bakker23647b42014-07-04 15:00:12 +02004488 * Add server-side enforcement of sent renegotiation requests
4489 (ssl_set_renegotiation_enforced())
Manuel Pégourié-Gonnarddfc7df02014-06-30 17:59:55 +02004490 * Add SSL_CIPHERSUITES config.h flag to allow specifying a list of
4491 ciphersuites to use and save some memory if the list is small.
Paul Bakkerc6ece492014-05-22 15:45:03 +02004492
Paul Bakker863989b2014-06-12 21:49:01 +02004493Changes
4494 * Add LINK_WITH_PTHREAD option in CMake for explicit linking that is
4495 required on some platforms (e.g. OpenBSD)
Paul Bakker34617722014-06-13 17:20:13 +02004496 * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
4497 against unwanted compiler optimizations
Manuel Pégourié-Gonnardbd772542014-07-07 14:02:33 +02004498 * md_list() now returns hashes strongest first
Manuel Pégourié-Gonnard08e81e02014-07-08 12:56:25 +02004499 * Selection of hash for signing ServerKeyExchange in TLS 1.2 now picks
4500 strongest offered by client.
Paul Bakker28476e22014-07-01 15:59:04 +02004501 * All public contexts have _init() and _free() functions now for simpler
4502 usage pattern
Paul Bakker863989b2014-06-12 21:49:01 +02004503
Paul Bakker5593f7c2014-05-06 10:29:28 +02004504Bugfix
4505 * Fix in debug_print_msg()
Paul Bakker1ebc0c52014-05-22 15:47:58 +02004506 * Enforce alignment in the buffer allocator even if buffer is not aligned
Paul Bakkerdff31392014-05-22 15:06:41 +02004507 * Remove less-than-zero checks on unsigned numbers
Paul Bakker0f651c72014-05-22 15:12:19 +02004508 * Stricter check on SSL ClientHello internal sizes compared to actual packet
4509 size (found by TrustInSoft)
Paul Bakker49033ba2014-06-12 21:46:13 +02004510 * Fix WSAStartup() return value check (found by Peter Vaskovic)
4511 * Other minor issues (found by Peter Vaskovic)
4512 * Fix symlink command for cross compiling with CMake (found by Andre
4513 Heinecke)
Paul Bakker3c38f292014-06-13 17:37:46 +02004514 * Fix DER output of gen_key app (found by Gergely Budai)
Manuel Pégourié-Gonnard08485cc2014-06-18 23:11:34 +02004515 * Very small records were incorrectly rejected when truncated HMAC was in
Manuel Pégourié-Gonnardeaa76f72014-06-18 16:06:02 +02004516 use with some ciphersuites and versions (RC4 in all versions, CBC with
4517 versions < TLS 1.1).
Manuel Pégourié-Gonnard08485cc2014-06-18 23:11:34 +02004518 * Very large records using more than 224 bytes of padding were incorrectly
4519 rejected with CBC-based ciphersuites and TLS >= 1.1
4520 * Very large records using less padding could cause a buffer overread of up
4521 to 32 bytes with CBC-based ciphersuites and TLS >= 1.1
Manuel Pégourié-Gonnardc4eff162014-06-19 12:18:08 +02004522 * Restore ability to use a v1 cert as a CA if trusted locally. (This had
4523 been removed in 1.3.6.)
Manuel Pégourié-Gonnardd249b7a2014-06-24 11:49:16 +02004524 * Restore ability to locally trust a self-signed cert that is not a proper
4525 CA for use as an end entity certificate. (This had been removed in
4526 1.3.6.)
Barry K. Nathan35e7cb92014-05-05 23:26:13 -07004527 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
Manuel Pégourié-Gonnardacbcbba2014-06-19 17:20:43 +02004528 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
4529 interpret semicolons as comment delimiters (found by Barry K. Nathan).
Manuel Pégourié-Gonnardfd35af12014-06-23 14:10:13 +02004530 * Fix off-by-one error in parsing Supported Point Format extension that
4531 caused some handshakes to fail.
Manuel Pégourié-Gonnard8df68632014-06-23 17:56:08 +02004532 * Fix possible miscomputation of the premaster secret with DHE-PSK key
4533 exchange that caused some handshakes to fail with other implementations.
4534 (Failure rate <= 1/255 with common DHM moduli.)
Manuel Pégourié-Gonnard31357252014-06-24 17:57:57 +02004535 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
Paul Bakkerd5983182014-07-04 13:50:31 +02004536 * Fix base64_decode() to return and check length correctly (in case of
4537 tight buffers)
Paul Bakker6c343d72014-07-10 14:36:19 +02004538 * Fix mpi_write_string() to write "00" as hex output for empty MPI (found
4539 by Hui Dong)
Paul Bakker5593f7c2014-05-06 10:29:28 +02004540
Paul Bakker47431b62014-05-02 13:27:13 +02004541= PolarSSL 1.3.7 released on 2014-05-02
Paul Bakkereaebbd52014-04-25 15:04:14 +02004542Features
Paul Bakkerc73079a2014-04-25 16:34:30 +02004543 * debug_set_log_mode() added to determine raw or full logging
4544 * debug_set_threshold() added to ignore messages over threshold level
Paul Bakker0f90d7d2014-04-30 11:49:44 +02004545 * version_check_feature() added to check for compile-time options at
4546 run-time
Paul Bakker92478c32014-04-25 15:18:34 +02004547
Paul Bakker088c5c52014-04-25 11:11:10 +02004548Changes
4549 * POLARSSL_CONFIG_OPTIONS has been removed. All values are individually
4550 checked and filled in the relevant module headers
Paul Bakker92478c32014-04-25 15:18:34 +02004551 * Debug module only outputs full lines instead of parts
Paul Bakker63844402014-04-30 15:34:12 +02004552 * Better support for the different Attribute Types from IETF PKIX (RFC 5280)
Manuel Pégourié-Gonnard63a5bfe2014-04-26 17:21:07 +02004553 * AES-NI now compiles with "old" assemblers too
Manuel Pégourié-Gonnardc16f4e12014-04-29 18:23:07 +02004554 * Ciphersuites based on RC4 now have the lowest priority by default
Paul Bakker088c5c52014-04-25 11:11:10 +02004555
Paul Bakkere92f73d2014-04-18 14:08:26 +02004556Bugfix
4557 * Only iterate over actual certificates in ssl_write_certificate_request()
4558 (found by Matthew Page)
Paul Bakker4ffcd2f2014-04-25 11:44:12 +02004559 * Typos in platform.c and pkcs11.c (found by Daniel Phillips and Steffan
4560 Karger)
Paul Bakkerfdba4682014-04-25 11:48:35 +02004561 * cert_write app should use subject of issuer certificate as issuer of cert
Paul Bakker61885c72014-04-25 12:59:03 +02004562 * Fix false reject in padding check in ssl_decrypt_buf() for CBC
4563 ciphersuites, for full SSL frames of data.
Paul Bakkera7036632014-04-30 10:15:38 +02004564 * Improve interoperability by not writing extension length in ClientHello /
4565 ServerHello when no extensions are present (found by Matthew Page)
Paul Bakker24f37cc2014-04-30 13:33:35 +02004566 * rsa_check_pubkey() now allows an E up to N
Paul Bakkerf96f7b62014-04-30 16:02:38 +02004567 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
Paul Bakker33dc46b2014-04-30 16:11:39 +02004568 * mpi_fill_random() was creating numbers larger than requested on
4569 big-endian platform when size was not an integer number of limbs
Manuel Pégourié-Gonnardedc81ff2014-04-29 15:06:49 +02004570 * Fix dependencies issues in X.509 test suite.
Manuel Pégourié-Gonnard3a306b92014-04-29 15:11:17 +02004571 * Some parts of ssl_tls.c were compiled even when the module was disabled.
Markus Pfeiffera26a0052014-04-22 20:16:15 +00004572 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
Barry K. Nathancf975f52014-04-23 17:40:25 -07004573 * Fix detection of Clang on some Apple platforms with CMake
4574 (found by Barry K. Nathan)
Paul Bakkere92f73d2014-04-18 14:08:26 +02004575
Paul Bakker784b04f2014-04-11 15:33:59 +02004576= PolarSSL 1.3.6 released on 2014-04-11
Manuel Pégourié-Gonnard969ccc62014-03-26 19:53:25 +01004577
Paul Bakker27e36d32014-04-08 12:33:37 +02004578Features
4579 * Support for the ALPN SSL extension
Paul Bakker1cfc4582014-04-09 15:25:13 +02004580 * Add option 'use_dev_random' to gen_key application
Manuel Pégourié-Gonnardb7fff0f2014-04-11 11:32:39 +02004581 * Enable verification of the keyUsage extension for CA and leaf
Paul Bakker59366212014-04-09 15:55:20 +02004582 certificates (POLARSSL_X509_CHECK_KEY_USAGE)
Manuel Pégourié-Gonnardb7fff0f2014-04-11 11:32:39 +02004583 * Enable verification of the extendedKeyUsage extension
4584 (POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE)
Paul Bakker27e36d32014-04-08 12:33:37 +02004585
Paul Bakker4984d3c2014-04-04 15:39:37 +02004586Changes
4587 * x509_crt_info() now prints information about parsed extensions as well
Manuel Pégourié-Gonnard2abed842014-04-08 12:40:15 +02004588 * pk_verify() now returns a specific error code when the signature is valid
4589 but shorter than the supplied length.
Manuel Pégourié-Gonnard0776a432014-04-11 12:25:45 +02004590 * Use UTC time to check certificate validity.
Manuel Pégourié-Gonnard9655e452014-04-11 12:29:49 +02004591 * Reject certificates with times not in UTC, per RFC 5280.
Paul Bakker4984d3c2014-04-04 15:39:37 +02004592
Manuel Pégourié-Gonnarddd75c312014-03-31 11:55:42 +02004593Security
4594 * Avoid potential timing leak in ecdsa_sign() by blinding modular division.
4595 (Found by Watson Ladd.)
Manuel Pégourié-Gonnard8c045ef2014-04-08 11:55:03 +02004596 * The notAfter date of some certificates was no longer checked since 1.3.5.
4597 This affects certificates in the user-supplied chain except the top
4598 certificate. If the user-supplied chain contains only one certificates,
4599 it is not affected (ie, its notAfter date is properly checked).
Paul Bakker4224bc02014-04-08 14:36:50 +02004600 * Prevent potential NULL pointer dereference in ssl_read_record() (found by
4601 TrustInSoft)
Manuel Pégourié-Gonnarddd75c312014-03-31 11:55:42 +02004602
Manuel Pégourié-Gonnard969ccc62014-03-26 19:53:25 +01004603Bugfix
4604 * The length of various ClientKeyExchange messages was not properly checked.
Manuel Pégourié-Gonnard6b0d2682014-03-25 11:24:43 +01004605 * Some example server programs were not sending the close_notify alert.
Paul Bakker75a28602014-03-31 12:08:17 +02004606 * Potential memory leak in mpi_exp_mod() when error occurs during
4607 calculation of RR.
Manuel Pégourié-Gonnard74bc68a2014-04-02 13:20:00 +02004608 * Fixed malloc/free default #define in platform.c (found by Gergely Budai).
Manuel Pégourié-Gonnarde4421112014-04-02 13:50:05 +02004609 * Fixed type which made POLARSSL_ENTROPY_FORCE_SHA256 uneffective (found by
4610 Gergely Budai).
Manuel Pégourié-Gonnard887aa5b2014-04-04 13:57:20 +02004611 * Fix #include path in ecdsa.h which wasn't accepted by some compilers.
4612 (found by Gergely Budai)
Shuo Chen95a0d112014-04-04 21:04:40 -07004613 * Fix compile errors when POLARSSL_ERROR_STRERROR_BC is undefined (found by
4614 Shuo Chen).
Manuel Pégourié-Gonnard7afdb882014-03-28 16:06:35 +01004615 * oid_get_numeric_string() used to truncate the output without returning an
4616 error if the output buffer was just 1 byte too small.
Manuel Pégourié-Gonnard3fec2202014-03-29 16:42:38 +01004617 * dhm_parse_dhm() (hence dhm_parse_dhmfile()) did not set dhm->len.
Manuel Pégourié-Gonnard01488752014-04-03 22:09:18 +02004618 * Calling pk_debug() on an RSA-alt key would segfault.
4619 * pk_get_size() and pk_get_len() were off by a factor 8 for RSA-alt keys.
Paul Bakker16300582014-04-11 13:28:43 +02004620 * Potential buffer overwrite in pem_write_buffer() because of low length
4621 indication (found by Thijs Alkemade)
Manuel Pégourié-Gonnard78848372014-04-10 17:45:07 +02004622 * EC curves constants, which should be only in ROM since 1.3.3, were also
4623 stored in RAM due to missing 'const's (found by Gergely Budai).
Manuel Pégourié-Gonnard969ccc62014-03-26 19:53:25 +01004624
Paul Bakker96d52652014-03-26 16:55:50 +01004625= PolarSSL 1.3.5 released on 2014-03-26
Paul Bakker5fb8efe2014-02-05 15:54:34 +01004626Features
4627 * HMAC-DRBG as a separate module
Manuel Pégourié-Gonnard84c30c72014-02-26 17:38:55 +01004628 * Option to set the Curve preference order (disabled by default)
Paul Bakker6a28e722014-02-06 13:41:55 +01004629 * Single Platform compatilibity layer (for memory / printf / fprintf)
Paul Bakkerf2561b32014-02-06 15:11:55 +01004630 * Ability to provide alternate timing implementation
Paul Bakker2ceda572014-02-06 15:55:25 +01004631 * Ability to force the entropy module to use SHA-256 as its basis
4632 (POLARSSL_ENTROPY_FORCE_SHA256)
Paul Bakker6a8e7f82014-03-17 13:45:06 +01004633 * Testing script ssl-opt.sh added for testing 'live' ssl option
4634 interoperability against OpenSSL and PolarSSL
Manuel Pégourié-Gonnard86b400f2014-03-19 16:55:29 +01004635 * Support for reading EC keys that use SpecifiedECDomain in some cases.
Paul Bakker66ff70d2014-03-26 11:54:05 +01004636 * Entropy module now supports seed writing and reading
Paul Bakker6a28e722014-02-06 13:41:55 +01004637
4638Changes
4639 * Deprecated the Memory layer
Paul Bakker47703a02014-02-06 15:01:20 +01004640 * entropy_add_source(), entropy_update_manual() and entropy_gather()
4641 now thread-safe if POLARSSL_THREADING_C defined
Manuel Pégourié-Gonnard14ed1a22014-03-11 10:16:25 +01004642 * Improvements to the CMake build system, contributed by Julian Ospald.
Manuel Pégourié-Gonnardbb8661e2014-03-14 09:21:20 +01004643 * Work around a bug of the version of Clang shipped by Apple with Mavericks
4644 that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
Paul Bakker6a8e7f82014-03-17 13:45:06 +01004645 * Revamped the compat.sh interoperatibility script to include support for
4646 testing against GnuTLS
Manuel Pégourié-Gonnard7a2aba82014-03-25 16:37:27 +01004647 * Deprecated ssl_set_own_cert_rsa() and ssl_set_own_cert_rsa_alt()
Paul Bakker674e0b02014-03-26 13:26:52 +01004648 * Improvements to tests/Makefile, contributed by Oden Eriksson.
Paul Bakker5fb8efe2014-02-05 15:54:34 +01004649
Manuel Pégourié-Gonnard796c6f32014-03-10 09:34:49 +01004650Security
4651 * Forbid change of server certificate during renegotiation to prevent
Manuel Pégourié-Gonnardb2bf5a12014-03-25 16:28:12 +01004652 "triple handshake" attack when authentication mode is 'optional' (the
Manuel Pégourié-Gonnard796c6f32014-03-10 09:34:49 +01004653 attack was already impossible when authentication is required).
Manuel Pégourié-Gonnard95337652014-03-10 13:15:18 +01004654 * Check notBefore timestamp of certificates and CRLs from the future.
Manuel Pégourié-Gonnard83cdffc2014-03-10 21:20:29 +01004655 * Forbid sequence number wrapping
Manuel Pégourié-Gonnard7a2aba82014-03-25 16:37:27 +01004656 * Fixed possible buffer overflow with overlong PSK
Paul Bakker91c61bc2014-03-26 14:06:55 +01004657 * Possible remotely-triggered out-of-bounds memory access fixed (found by
4658 TrustInSoft)
Manuel Pégourié-Gonnard796c6f32014-03-10 09:34:49 +01004659
Manuel Pégourié-Gonnard6e8e34d2014-01-28 19:30:56 +01004660Bugfix
4661 * ecp_gen_keypair() does more tries to prevent failure because of
4662 statistics
Manuel Pégourié-Gonnard7a2aba82014-03-25 16:37:27 +01004663 * Fixed bug in RSA PKCS#1 v1.5 "reversed" operations
Paul Bakkercd6d69a2014-02-06 15:43:21 +01004664 * Fixed testing with out-of-source builds using cmake
Manuel Pégourié-Gonnard6b1e2072014-02-12 10:14:54 +01004665 * Fixed version-major intolerance in server
Paul Bakker3d52ab72014-03-07 10:33:55 +01004666 * Fixed CMake symlinking on out-of-source builds
Manuel Pégourié-Gonnard29dcc0b2014-03-10 11:32:07 +01004667 * Fixed dependency issues in test suite
Manuel Pégourié-Gonnard844a4c02014-03-10 21:55:35 +01004668 * Programs rsa_sign_pss and rsa_verify_pss were not using PSS since 1.3.0
Alex Wilson73491422014-03-06 00:04:09 +10004669 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
4670 Alex Wilson.)
Manuel Pégourié-Gonnard84c30c72014-02-26 17:38:55 +01004671 * ssl_cache was creating entries when max_entries=0 if TIMING_C was enabled.
4672 * m_sleep() was sleeping twice too long on most Unix platforms.
Manuel Pégourié-Gonnard145dfcb2014-02-26 14:23:33 +01004673 * Fixed bug with session tickets and non-blocking I/O in the unlikely case
Paul Bakkerb0695ce2014-03-17 13:42:23 +01004674 send() would return an EAGAIN error when sending the ticket.
Manuel Pégourié-Gonnard84c30c72014-02-26 17:38:55 +01004675 * ssl_cache was leaking memory when reusing a timed out entry containing a
Paul Bakkerb0695ce2014-03-17 13:42:23 +01004676 client certificate.
Manuel Pégourié-Gonnardd701c9a2014-02-26 17:54:07 +01004677 * ssl_srv was leaking memory when client presented a timed out ticket
Paul Bakkerb0695ce2014-03-17 13:42:23 +01004678 containing a client certificate
Paul Bakker3d6504a2014-03-17 13:41:51 +01004679 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
4680 out_ctr failed
Paul Bakker77f4f392014-03-26 15:28:55 +01004681 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
4682 of one of them failed
Manuel Pégourié-Gonnardfdddac92014-03-25 15:58:35 +01004683 * Fix typo in rsa_copy() that impacted PKCS#1 v2 contexts
Paul Bakker5fff23b2014-03-26 15:34:54 +01004684 * x509_get_current_time() uses localtime_r() to prevent thread issues
Manuel Pégourié-Gonnard6e8e34d2014-01-28 19:30:56 +01004685
Paul Bakker2aca2412014-01-27 11:49:46 +01004686= PolarSSL 1.3.4 released on 2014-01-27
Paul Bakker3eb96732014-01-22 13:08:19 +01004687Features
Paul Bakker0ac99ca2014-01-22 13:08:44 +01004688 * Support for the Koblitz curves: secp192k1, secp224k1, secp256k1
Paul Bakker5862eee2014-01-22 14:18:03 +01004689 * Support for RIPEMD-160
Paul Bakker556efba2014-01-24 15:38:12 +01004690 * Support for AES CFB8 mode
Paul Bakkere6c2ddb2014-01-27 11:47:15 +01004691 * Support for deterministic ECDSA (RFC 6979)
Paul Bakker3eb96732014-01-22 13:08:19 +01004692
4693Bugfix
4694 * Potential memory leak in bignum_selftest()
4695 * Replaced expired test certificate
Paul Bakkerd75ba402014-01-24 16:11:17 +01004696 * ssl_mail_client now terminates lines with CRLF, instead of LF
Paul Bakkerb84582b2014-01-27 12:23:43 +01004697 * net module handles timeouts on blocking sockets better (found by Tilman
4698 Sauerbeck)
Paul Bakker2cb1a0c2014-01-27 13:36:23 +01004699 * Assembly format fixes in bn_mul.h
4700
4701Security
Paul Bakkerb84582b2014-01-27 12:23:43 +01004702 * Missing MPI_CHK calls added around unguarded mpi calls (found by
4703 TrustInSoft)
Paul Bakker3eb96732014-01-22 13:08:19 +01004704
Paul Bakker5bc07a32013-12-31 10:57:44 +01004705= PolarSSL 1.3.3 released on 2013-12-31
Paul Bakker014f1432013-12-02 14:54:01 +01004706Features
4707 * EC key generation support in gen_key app
Paul Bakker9dc53a92013-12-02 14:55:28 +01004708 * Support for adhering to client ciphersuite order preference
4709 (POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
Paul Bakker48d78a52013-12-05 16:11:38 +01004710 * Support for Curve25519
Paul Bakkerfdf94692013-12-17 13:09:31 +01004711 * Support for ECDH-RSA and ECDH-ECDSA key exchanges and ciphersuites
Paul Bakker5a607d22013-12-17 14:33:42 +01004712 * Support for IPv6 in the NET module
Paul Bakker23116fd2013-12-30 14:09:47 +01004713 * AES-NI support for AES, AES-GCM and AES key scheduling
Paul Bakkerf9c49532013-12-19 15:40:58 +01004714 * SSL Pthread-based server example added (ssl_pthread_server)
Paul Bakker014f1432013-12-02 14:54:01 +01004715
Paul Bakker7aa03752013-11-26 17:37:31 +01004716Changes
4717 * gen_prime() speedup
4718 * Speedup of ECP multiplication operation
4719 * Relaxed some SHA2 ciphersuite's version requirements
Paul Bakkerc3d0d072013-12-02 14:50:49 +01004720 * Dropped use of readdir_r() instead of readdir() with threading support
Paul Bakker4040d7e2013-12-02 14:52:57 +01004721 * More constant-time checks in the RSA module
Paul Bakkerb14817d2013-12-02 22:03:23 +01004722 * Split off curves from ecp.c into ecp_curves.c
Paul Bakker5ab68ba2013-12-17 13:10:48 +01004723 * Curves are now stored fully in ROM
Paul Bakkerc7387912013-12-31 10:32:50 +01004724 * Memory usage optimizations in ECP module
Paul Bakkera8fd3e32013-12-31 11:54:08 +01004725 * Removed POLARSSL_THREADING_DUMMY
Paul Bakker7aa03752013-11-26 17:37:31 +01004726
Paul Bakkerf2b4d862013-11-20 17:23:53 +01004727Bugfix
Manuel Pégourié-Gonnard9a4a5ac2013-12-04 18:05:29 +01004728 * Fixed bug in mpi_set_bit() on platforms where t_uint is wider than int
Paul Bakkerf2b4d862013-11-20 17:23:53 +01004729 * Fixed X.509 hostname comparison (with non-regular characters)
Paul Bakkera9a028e2013-11-21 17:31:06 +01004730 * SSL now gracefully handles missing RNG
Paul Bakker7aa03752013-11-26 17:37:31 +01004731 * Missing defines / cases for RSA_PSK key exchange
4732 * crypt_and_hash app checks MAC before final decryption
Paul Bakker6f0636a2013-12-16 15:24:05 +01004733 * Potential memory leak in ssl_ticket_keys_init()
Paul Bakkerf70fe812013-12-16 16:43:10 +01004734 * Memory leak in benchmark application
Paul Bakker1a56fc92013-12-19 13:51:24 +01004735 * Fixed x509_crt_parse_path() bug on Windows platforms
Paul Bakker6ea1a952013-12-31 11:16:03 +01004736 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
4737 TrustInSoft)
Paul Bakker6992eb72013-12-31 11:35:16 +01004738 * Fixed potential overflow in certificate size verification in
4739 ssl_write_certificate() (found by TrustInSoft)
Paul Bakkerf2b4d862013-11-20 17:23:53 +01004740
Paul Bakker956c9e02013-12-19 14:42:28 +01004741Security
4742 * Possible remotely-triggered out-of-bounds memory access fixed (found by
4743 TrustInSoft)
4744
Paul Bakkerf4dc1862013-11-04 17:29:42 +01004745= PolarSSL 1.3.2 released on 2013-11-04
Paul Bakker08bb1872013-10-28 14:03:26 +01004746Features
4747 * PK tests added to test framework
Paul Bakker3f917e22013-10-28 14:16:59 +01004748 * Added optional optimization for NIST MODP curves (POLARSSL_ECP_NIST_OPTIM)
Paul Bakker16421222013-10-28 14:37:09 +01004749 * Support for Camellia-GCM mode and ciphersuites
Paul Bakker08bb1872013-10-28 14:03:26 +01004750
Paul Bakker7bc745b2013-10-28 14:39:49 +01004751Changes
4752 * Padding checks in cipher layer are now constant-time
Paul Bakkere1121b62013-10-31 14:37:37 +01004753 * Value comparisons in SSL layer are now constant-time
Paul Bakker7b0be682013-10-29 14:24:37 +01004754 * Support for serialNumber, postalAddress and postalCode in X509 names
Paul Bakkere1121b62013-10-31 14:37:37 +01004755 * SSL Renegotiation was refactored
Paul Bakker7bc745b2013-10-28 14:39:49 +01004756
Paul Bakker677377f2013-10-28 12:54:26 +01004757Bugfix
Paul Bakker16421222013-10-28 14:37:09 +01004758 * More stringent checks in cipher layer
Paul Bakker677377f2013-10-28 12:54:26 +01004759 * Server does not send out extensions not advertised by client
Paul Bakker45a2c8d2013-10-28 12:57:08 +01004760 * Prevent possible alignment warnings on casting from char * to 'aligned *'
Paul Bakker68037da2013-10-28 14:02:40 +01004761 * Misc fixes and additions to dependency checks
Paul Bakker50dc8502013-10-28 21:19:10 +01004762 * Const correctness
Paul Bakker93c6aa42013-10-28 22:28:09 +01004763 * cert_write with selfsign should use issuer_name as subject_name
Manuel Pégourié-Gonnard178d9ba2013-10-29 10:45:28 +01004764 * Fix ECDSA corner case: missing reduction mod N (found by DualTachyon)
Paul Bakkerfa6a6202013-10-28 18:48:30 +01004765 * Defines to handle UEFI environment under MSVC
Paul Bakkere1121b62013-10-31 14:37:37 +01004766 * Server-side initiated renegotiations send HelloRequest
Paul Bakker677377f2013-10-28 12:54:26 +01004767
Paul Bakker5c17ccd2013-10-15 13:12:41 +02004768= PolarSSL 1.3.1 released on 2013-10-15
Paul Bakkerb799dec2013-10-11 10:03:27 +02004769Features
4770 * Support for Brainpool curves and TLS ciphersuites (RFC 7027)
Paul Bakker376e8152013-10-15 12:44:23 +02004771 * Support for ECDHE-PSK key-exchange and ciphersuites
Paul Bakkerf34673e2013-10-15 12:46:17 +02004772 * Support for RSA-PSK key-exchange and ciphersuites
Paul Bakkerb799dec2013-10-11 10:03:27 +02004773
Paul Bakkerddba8822013-10-11 09:21:56 +02004774Changes
4775 * RSA blinding locks for a smaller amount of time
Paul Bakker16770332013-10-11 09:59:44 +02004776 * TLS compression only allocates working buffer once
Paul Bakkerbe089b02013-10-14 15:51:50 +02004777 * Introduced POLARSSL_HAVE_READDIR_R for systems without it
Paul Bakkera7ea6a52013-10-15 11:55:10 +02004778 * config.h is more script-friendly
Paul Bakkerddba8822013-10-11 09:21:56 +02004779
4780Bugfix
4781 * Missing MSVC defines added
4782 * Compile errors with POLARSSL_RSA_NO_CRT
4783 * Header files with 'polarssl/'
Paul Bakkerfcc17212013-10-11 09:36:52 +02004784 * Const correctness
Paul Bakkerd61cc3b2013-10-11 09:38:49 +02004785 * Possible naming collision in dhm_context
Paul Bakker4aa40d42013-10-11 10:49:24 +02004786 * Better support for MSVC
Paul Bakkerb7c13122013-10-11 10:51:32 +02004787 * threading_set_alt() name
Paul Bakker5191e922013-10-11 10:54:28 +02004788 * Added missing x509write_crt_set_version()
Paul Bakkerddba8822013-10-11 09:21:56 +02004789
Paul Bakker5c17ccd2013-10-15 13:12:41 +02004790= PolarSSL 1.3.0 released on 2013-10-01
Paul Bakker41c83d32013-03-20 14:39:14 +01004791Features
4792 * Elliptic Curve Cryptography module added
4793 * Elliptic Curve Diffie Hellman module added
4794 * Ephemeral Elliptic Curve Diffie Hellman support for SSL/TLS
4795 (ECDHE-based ciphersuites)
Paul Bakkerc8676782013-08-28 12:15:11 +02004796 * Ephemeral Elliptic Curve Digital Signature Algorithm support for SSL/TLS
4797 (ECDSA-based ciphersuites)
Paul Bakker8f4ddae2013-04-15 15:09:54 +02004798 * Ability to specify allowed ciphersuites based on the protocol version.
Paul Bakkerb91c2b52013-04-19 16:05:16 +02004799 * PSK and DHE-PSK based ciphersuites added
Paul Bakker6e339b52013-07-03 13:37:05 +02004800 * Memory allocation abstraction layer added
4801 * Buffer-based memory allocator added (no malloc() / free() / HEAP usage)
Paul Bakker2466d932013-09-28 14:40:38 +02004802 * Threading abstraction layer added (dummy / pthread / alternate)
Paul Bakker5ad403f2013-09-18 21:21:30 +02004803 * Public Key abstraction layer added
Paul Bakkerf85778e2013-07-19 14:55:25 +02004804 * Parsing Elliptic Curve keys
4805 * Parsing Elliptic Curve certificates
4806 * Support for max_fragment_length extension (RFC 6066)
4807 * Support for truncated_hmac extension (RFC 6066)
Paul Bakkerda4d1c32013-08-14 12:24:34 +02004808 * Support for zeros-and-length (ANSI X.923) padding, one-and-zeros
4809 (ISO/IEC 7816-4) padding and zero padding in the cipher layer
Paul Bakker936539a2013-08-14 13:49:20 +02004810 * Support for session tickets (RFC 5077)
Paul Bakkerca174fe2013-08-28 16:31:30 +02004811 * Certificate Request (CSR) generation with extensions (key_usage,
4812 ns_cert_type)
Paul Bakker7fb4a792013-09-12 12:00:52 +02004813 * X509 Certificate writing with extensions (basic_constraints,
4814 issuer_key_identifier, etc)
Paul Bakker6ec34fb2013-09-10 14:53:46 +02004815 * Optional blinding for RSA, DHM and EC
Paul Bakker8b817dc2013-09-25 18:03:58 +02004816 * Support for multiple active certificate / key pairs in SSL servers for
Darryl Green11999bb2018-03-13 15:22:58 +00004817 the same host (Not to be confused with SNI!)
Paul Bakker41c83d32013-03-20 14:39:14 +01004818
Paul Bakker9b5798d2013-03-13 13:53:00 +01004819Changes
Paul Bakkerd2f068e2013-08-27 21:19:20 +02004820 * Ability to enable / disable SSL v3 / TLS 1.0 / TLS 1.1 / TLS 1.2
4821 individually
Paul Bakker68884e32013-01-07 18:20:04 +01004822 * Introduced separate SSL Ciphersuites module that is based on
4823 Cipher and MD information
Paul Bakker9b5798d2013-03-13 13:53:00 +01004824 * Internals for SSL module adapted to have separate IV pointer that is
4825 dynamically set (Better support for hardware acceleration)
Paul Bakkerc70b9822013-04-07 22:00:46 +02004826 * Moved all OID functionality to a separate module. RSA function
4827 prototypes for the RSA sign and verify functions changed as a result
Paul Bakkerb9d3cfa2013-06-26 15:07:16 +02004828 * Split up the GCM module into a starts/update/finish cycle
Paul Bakker2fbefde2013-06-29 16:01:15 +02004829 * Client and server now filter sent and accepted ciphersuites on minimum
4830 and maximum protocol version
Paul Bakker0be444a2013-08-27 21:55:01 +02004831 * Ability to disable server_name extension (RFC 6066)
Paul Bakkere2ab84f2013-06-29 18:24:32 +02004832 * Renamed error_strerror() to the less conflicting polarssl_strerror()
4833 (Ability to keep old as well with POLARSSL_ERROR_STRERROR_BC)
Paul Bakker9e36f042013-06-30 14:34:05 +02004834 * SHA2 renamed to SHA256, SHA4 renamed to SHA512 and functions accordingly
Paul Bakker548957d2013-08-30 10:30:02 +02004835 * All RSA operations require a random generator for blinding purposes
Paul Bakker45f21c72013-09-18 15:33:49 +02004836 * X509 core refactored
4837 * x509_crt_verify() now case insensitive for cn (RFC 6125 6.4)
Paul Bakker5ad403f2013-09-18 21:21:30 +02004838 * Also compiles / runs without time-based functions (!POLARSSL_HAVE_TIME)
Paul Bakkerc27c4e22013-09-23 15:01:36 +02004839 * Support faulty X509 v1 certificates with extensions
4840 (POLARSSL_X509_ALLOW_EXTENSIONS_NON_V3)
Paul Bakker9b5798d2013-03-13 13:53:00 +01004841
Paul Bakkereff2e6d2013-04-11 17:13:22 +02004842Bugfix
Paul Bakker73d44312013-05-22 13:56:26 +02004843 * Fixed parse error in ssl_parse_certificate_request()
Paul Bakkerabf2f8f2013-06-30 14:57:46 +02004844 * zlib compression/decompression skipped on empty blocks
Paul Bakker1e6a1752013-07-26 14:10:22 +02004845 * Support for AIX header locations in net.c module
Paul Bakker003dbad2013-09-09 17:26:14 +02004846 * Fixed file descriptor leaks
Paul Bakkereff2e6d2013-04-11 17:13:22 +02004847
Paul Bakkeraab30c12013-08-30 11:00:25 +02004848Security
4849 * RSA blinding on CRT operations to counter timing attacks
4850 (found by Cyril Arnaud and Pierre-Alain Fouque)
4851
Manuel Pégourié-Gonnard7b124922015-04-30 10:16:19 +02004852
4853= Version 1.2.14 released 2015-05-??
4854
4855Security
4856 * Fix potential invalid memory read in the server, that allows a client to
4857 crash it remotely (found by Caj Larsson).
4858 * Fix potential invalid memory read in certificate parsing, that allows a
4859 client to crash the server remotely if client authentication is enabled
4860 (found using Codenomicon Defensics).
4861 * Add countermeasure against "Lucky 13 strikes back" cache-based attack,
4862 https://dl.acm.org/citation.cfm?id=2714625
4863
4864Bugfix
4865 * Fix bug in Via Padlock support (found by Nikos Mavrogiannopoulos).
4866 * Fix hardclock() (only used in the benchmarking program) with some
4867 versions of mingw64 (found by kxjhlele).
4868 * Fix warnings from mingw64 in timing.c (found by kxjklele).
4869 * Fix potential unintended sign extension in asn1_get_len() on 64-bit
4870 platforms (found with Coverity Scan).
4871
4872= Version 1.2.13 released 2015-02-16
4873Note: Although PolarSSL has been renamed to mbed TLS, no changes reflecting
4874 this will be made in the 1.2 branch at this point.
4875
4876Security
4877 * Fix remotely-triggerable uninitialised pointer dereference caused by
4878 crafted X.509 certificate (TLS server is not affected if it doesn't ask
4879 for a client certificate) (found using Codenomicon Defensics).
4880 * Fix remotely-triggerable memory leak caused by crafted X.509 certificates
4881 (TLS server is not affected if it doesn't ask for a client certificate)
4882 (found using Codenomicon Defensics).
4883 * Fix potential stack overflow while parsing crafted X.509 certificates
4884 (TLS server is not affected if it doesn't ask for a client certificate)
4885 found using Codenomicon Defensics).
4886 * Fix buffer overread of size 1 when parsing crafted X.509 certificates
4887 (TLS server is not affected if it doesn't ask for a client certificate).
4888
4889Bugfix
4890 * Fix potential undefined behaviour in Camellia.
4891 * Fix memory leaks in PKCS#5 and PKCS#12.
4892 * Stack buffer overflow if ctr_drbg_update() is called with too large
4893 add_len (found by Jean-Philippe Aumasson) (not triggerable remotely).
4894 * Fix bug in MPI/bignum on s390/s390x (reported by Dan Horák) (introduced
4895 in 1.2.12).
4896 * Fix unchecked return code in x509_crt_parse_path() on Windows (found by
4897 Peter Vaskovic).
4898 * Fix assembly selection for MIPS64 (thanks to James Cowgill).
4899 * ssl_get_verify_result() now works even if the handshake was aborted due
4900 to a failed verification (found by Fredrik Axelsson).
4901 * Skip writing and parsing signature_algorithm extension if none of the
4902 key exchanges enabled needs certificates. This fixes a possible interop
4903 issue with some servers when a zero-length extension was sent. (Reported
4904 by Peter Dettman.)
4905 * On a 0-length input, base64_encode() did not correctly set output length
4906 (found by Hendrik van den Boogaard).
4907
4908Changes
4909 * Blind RSA private operations even when POLARSSL_RSA_NO_CRT is defined.
4910 * Forbid repeated extensions in X.509 certificates.
4911 * Add compile-time option POLARSSL_X509_MAX_INTERMEDIATE_CA to limit the
4912 length of an X.509 verification chain (default = 8).
Paul Bakkera6c5ea22014-10-24 16:26:29 +02004913= Version 1.2.12 released 2014-10-24
4914
4915Security
4916 * Remotely-triggerable memory leak when parsing some X.509 certificates
4917 (server is not affected if it doesn't ask for a client certificate).
4918 (Found using Codenomicon Defensics.)
4919
4920Bugfix
4921 * Fix potential bad read in parsing ServerHello (found by Adrien
4922 Vialletelle).
4923 * ssl_close_notify() could send more than one message in some circumstances
4924 with non-blocking I/O.
4925 * x509_crt_parse() did not increase total_failed on PEM error
4926 * Fix compiler warnings on iOS (found by Sander Niemeijer).
4927 * Don't print uninitialised buffer in ssl_mail_client (found by Marc Abel).
4928 * Fix net_accept() regarding non-blocking sockets (found by Luca Pesce).
4929 * ssl_read() could return non-application data records on server while
4930 renegotation was pending, and on client when a HelloRequest was received.
4931 * Fix warnings from Clang's scan-build (contributed by Alfred Klomp).
4932
4933Changes
4934 * X.509 certificates with more than one AttributeTypeAndValue per
4935 RelativeDistinguishedName are not accepted any more.
4936 * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
4937 POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
4938 * Accept spaces at end of line or end of buffer in base64_decode().
4939
Paul Bakker0ae5a3d2014-07-11 11:28:30 +02004940= Version 1.2.11 released 2014-07-11
4941Features
4942 * Entropy module now supports seed writing and reading
4943
4944Changes
4945 * Introduced POLARSSL_HAVE_READDIR_R for systems without it
4946 * Improvements to the CMake build system, contributed by Julian Ospald.
4947 * Work around a bug of the version of Clang shipped by Apple with Mavericks
4948 that prevented bignum.c from compiling. (Reported by Rafael Baptista.)
4949 * Improvements to tests/Makefile, contributed by Oden Eriksson.
4950 * Use UTC time to check certificate validity.
4951 * Reject certificates with times not in UTC, per RFC 5280.
4952 * Migrate zeroizing of data to polarssl_zeroize() instead of memset()
4953 against unwanted compiler optimizations
4954
4955Security
4956 * Forbid change of server certificate during renegotiation to prevent
4957 "triple handshake" attack when authentication mode is optional (the
4958 attack was already impossible when authentication is required).
4959 * Check notBefore timestamp of certificates and CRLs from the future.
4960 * Forbid sequence number wrapping
4961 * Prevent potential NULL pointer dereference in ssl_read_record() (found by
4962 TrustInSoft)
4963 * Fix length checking for AEAD ciphersuites (found by Codenomicon).
4964 It was possible to crash the server (and client) using crafted messages
4965 when a GCM suite was chosen.
4966
4967Bugfix
4968 * Fixed X.509 hostname comparison (with non-regular characters)
4969 * SSL now gracefully handles missing RNG
4970 * crypt_and_hash app checks MAC before final decryption
4971 * Fixed x509_crt_parse_path() bug on Windows platforms
4972 * Added missing MPI_CHK() around some statements in mpi_div_mpi() (found by
4973 TrustInSoft)
4974 * Fixed potential overflow in certificate size verification in
4975 ssl_write_certificate() (found by TrustInSoft)
4976 * Fix ASM format in bn_mul.h
4977 * Potential memory leak in bignum_selftest()
4978 * Replaced expired test certificate
4979 * ssl_mail_client now terminates lines with CRLF, instead of LF
4980 * Fix bug in RSA PKCS#1 v1.5 "reversed" operations
4981 * Fixed testing with out-of-source builds using cmake
4982 * Fixed version-major intolerance in server
4983 * Fixed CMake symlinking on out-of-source builds
4984 * Bignum's MIPS-32 assembly was used on MIPS-64, causing chaos. (Found by
4985 Alex Wilson.)
4986 * ssl_init() was leaving a dirty pointer in ssl_context if malloc of
4987 out_ctr failed
4988 * ssl_handshake_init() was leaving dirty pointers in subcontexts if malloc
4989 of one of them failed
4990 * x509_get_current_time() uses localtime_r() to prevent thread issues
4991 * Some example server programs were not sending the close_notify alert.
4992 * Potential memory leak in mpi_exp_mod() when error occurs during
4993 calculation of RR.
4994 * Improve interoperability by not writing extension length in ClientHello
4995 when no extensions are present (found by Matthew Page)
4996 * rsa_check_pubkey() now allows an E up to N
4997 * On OpenBSD, use arc4random_buf() instead of rand() to prevent warnings
4998 * mpi_fill_random() was creating numbers larger than requested on
4999 big-endian platform when size was not an integer number of limbs
5000 * Fix detection of DragonflyBSD in net.c (found by Markus Pfeiffer)
5001 * Stricter check on SSL ClientHello internal sizes compared to actual packet
5002 size (found by TrustInSoft)
5003 * Fix preprocessor checks for bn_mul PPC asm (found by Barry K. Nathan).
5004 * Use \n\t rather than semicolons for bn_mul asm, since some assemblers
5005 interpret semicolons as comment delimiters (found by Barry K. Nathan).
5006 * Disable broken Sparc64 bn_mul assembly (found by Florian Obser).
5007 * Fix base64_decode() to return and check length correctly (in case of
5008 tight buffers)
5009
Paul Bakker3a2c0562013-10-07 16:22:05 +02005010= Version 1.2.10 released 2013-10-07
5011Changes
5012 * Changed RSA blinding to a slower but thread-safe version
5013
5014Bugfix
5015 * Fixed memory leak in RSA as a result of introduction of blinding
5016 * Fixed ssl_pkcs11_decrypt() prototype
5017 * Fixed MSVC project files
5018
Paul Bakkerd93d28e2013-10-01 10:12:42 +02005019= Version 1.2.9 released 2013-10-01
Paul Bakkerc13aab12013-09-26 10:12:19 +02005020Changes
5021 * x509_verify() now case insensitive for cn (RFC 6125 6.4)
5022
5023Bugfix
5024 * Fixed potential memory leak when failing to resume a session
5025 * Fixed potential file descriptor leaks (found by Remi Gacogne)
5026 * Minor fixes
5027
5028Security
5029 * Fixed potential heap buffer overflow on large hostname setting
5030 * Fixed potential negative value misinterpretation in load_file()
5031 * RSA blinding on CRT operations to counter timing attacks
5032 (found by Cyril Arnaud and Pierre-Alain Fouque)
5033
Paul Bakkerde656232013-06-24 19:07:34 +02005034= Version 1.2.8 released 2013-06-19
5035Features
5036 * Parsing of PKCS#8 encrypted private key files
5037 * PKCS#12 PBE and derivation functions
5038 * Centralized module option values in config.h to allow user-defined
5039 settings without editing header files by using POLARSSL_CONFIG_OPTIONS
5040
5041Changes
5042 * HAVEGE random generator disabled by default
5043 * Internally split up x509parse_key() into a (PEM) handler function
5044 and specific DER parser functions for the PKCS#1 and unencrypted
5045 PKCS#8 private key formats
5046 * Added mechanism to provide alternative implementations for all
5047 symmetric cipher and hash algorithms (e.g. POLARSSL_AES_ALT in
Darryl Green11999bb2018-03-13 15:22:58 +00005048 config.h)
Paul Bakkerde656232013-06-24 19:07:34 +02005049 * PKCS#5 module added. Moved PBKDF2 functionality inside and deprecated
5050 old PBKDF2 module
5051
5052Bugfix
5053 * Secure renegotiation extension should only be sent in case client
5054 supports secure renegotiation
5055 * Fixed offset for cert_type list in ssl_parse_certificate_request()
5056 * Fixed const correctness issues that have no impact on the ABI
5057 * x509parse_crt() now better handles PEM error situations
5058 * ssl_parse_certificate() now calls x509parse_crt_der() directly
5059 instead of the x509parse_crt() wrapper that can also parse PEM
Darryl Green11999bb2018-03-13 15:22:58 +00005060 certificates
Paul Bakkerde656232013-06-24 19:07:34 +02005061 * x509parse_crtpath() is now reentrant and uses more portable stat()
5062 * Fixed bignum.c and bn_mul.h to support Thumb2 and LLVM compiler
5063 * Fixed values for 2-key Triple DES in cipher layer
5064 * ssl_write_certificate_request() can handle empty ca_chain
5065
5066Security
5067 * A possible DoS during the SSL Handshake, due to faulty parsing of
5068 PEM-encoded certificates has been fixed (found by Jack Lloyd)
5069
5070= Version 1.2.7 released 2013-04-13
5071Features
5072 * Ability to specify allowed ciphersuites based on the protocol version.
5073
5074Changes
5075 * Default Blowfish keysize is now 128-bits
5076 * Test suites made smaller to accommodate Raspberry Pi
5077
5078Bugfix
5079 * Fix for MPI assembly for ARM
5080 * GCM adapted to support sizes > 2^29
5081
Paul Bakker90f042d2013-03-11 11:38:44 +01005082= Version 1.2.6 released 2013-03-11
Paul Bakkerc0463502013-02-14 11:19:38 +01005083Bugfix
5084 * Fixed memory leak in ssl_free() and ssl_reset() for active session
Paul Bakker3d2dc0f2013-02-27 14:52:37 +01005085 * Corrected GCM counter incrementation to use only 32-bits instead of
5086 128-bits (found by Yawning Angel)
Paul Bakkere3e4a592013-02-28 10:20:53 +01005087 * Fixes for 64-bit compilation with MS Visual Studio
Paul Bakker37286a52013-03-06 16:55:11 +01005088 * Fixed net_bind() for specified IP addresses on little endian systems
Paul Bakkerfb1cbd32013-03-06 18:14:52 +01005089 * Fixed assembly code for ARM (Thumb and regular) for some compilers
Paul Bakkerc0463502013-02-14 11:19:38 +01005090
Paul Bakkerb3869132013-02-28 17:21:01 +01005091Changes
5092 * Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(),
5093 rsa_pkcs1_sign() and rsa_pkcs1_verify() to separate PKCS#1 v1.5 and
5094 PKCS#1 v2.1 functions
Paul Bakkera43231c2013-02-28 17:33:49 +01005095 * Added support for custom labels when using rsa_rsaes_oaep_encrypt()
5096 or rsa_rsaes_oaep_decrypt()
Paul Bakker78a8c712013-03-06 17:01:52 +01005097 * Re-added handling for SSLv2 Client Hello when the define
5098 POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO is set
Paul Bakkere81beda2013-03-06 17:40:46 +01005099 * The SSL session cache module (ssl_cache) now also retains peer_cert
5100 information (not the entire chain)
Paul Bakkerb3869132013-02-28 17:21:01 +01005101
Paul Bakkere47b34b2013-02-27 14:48:00 +01005102Security
5103 * Removed further timing differences during SSL message decryption in
5104 ssl_decrypt_buf()
Paul Bakker8804f692013-02-28 18:06:26 +01005105 * Removed timing differences due to bad padding from
5106 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
5107 operations
Paul Bakkere47b34b2013-02-27 14:48:00 +01005108
Paul Bakkerc7a2da42013-02-02 19:23:57 +01005109= Version 1.2.5 released 2013-02-02
Paul Bakker8fe40dc2013-02-02 12:43:08 +01005110Changes
5111 * Allow enabling of dummy error_strerror() to support some use-cases
Paul Bakkerd66f0702013-01-31 16:57:45 +01005112 * Debug messages about padding errors during SSL message decryption are
Hanno Becker01a0e072017-07-26 11:49:40 +01005113 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
Paul Bakker40865c82013-01-31 17:13:13 +01005114 * Sending of security-relevant alert messages that do not break
5115 interoperability can be switched on/off with the flag
Paul Bakkera35aa542013-03-06 17:06:21 +01005116 POLARSSL_SSL_ALL_ALERT_MESSAGES
Paul Bakker8fe40dc2013-02-02 12:43:08 +01005117
Paul Bakker45829992013-01-03 14:52:21 +01005118Security
5119 * Removed timing differences during SSL message decryption in
5120 ssl_decrypt_buf() due to badly formatted padding
5121
Paul Bakker14c56a32013-01-25 17:11:37 +01005122= Version 1.2.4 released 2013-01-25
Paul Bakker1961b702013-01-25 14:49:24 +01005123Changes
Paul Bakker68884e32013-01-07 18:20:04 +01005124 * More advanced SSL ciphersuite representation and moved to more dynamic
5125 SSL core
Paul Bakker1961b702013-01-25 14:49:24 +01005126 * Added ssl_handshake_step() to allow single stepping the handshake process
5127
Paul Bakker40628ba2013-01-03 10:50:31 +01005128Bugfix
5129 * Memory leak when using RSA_PKCS_V21 operations fixed
Paul Bakker21dca692013-01-03 11:41:08 +01005130 * Handle future version properly in ssl_write_certificate_request()
Paul Bakker9c94cdd2013-01-22 13:45:33 +01005131 * Correctly handle CertificateRequest message in client for <= TLS 1.1
5132 without DN list
Paul Bakker40628ba2013-01-03 10:50:31 +01005133
Paul Bakkerfb1ba782012-11-26 16:28:25 +01005134= Version 1.2.3 released 2012-11-26
5135Bugfix
5136 * Server not always sending correct CertificateRequest message
5137
Paul Bakkerdf5069c2012-11-24 12:20:19 +01005138= Version 1.2.2 released 2012-11-24
Paul Bakkere667c982012-11-20 13:50:22 +01005139Changes
5140 * Added p_hw_data to ssl_context for context specific hardware acceleration
5141 data
Hanno Becker01a0e072017-07-26 11:49:40 +01005142 * During verify trust-CA is only checked for expiration and CRL presence
Paul Bakkere667c982012-11-20 13:50:22 +01005143
Paul Bakker7c90da92012-11-23 14:02:40 +01005144Bugfixes
Paul Bakkerdf5069c2012-11-24 12:20:19 +01005145 * Fixed client authentication compatibility
5146 * Fixed dependency on POLARSSL_SHA4_C in SSL modules
Paul Bakker7c90da92012-11-23 14:02:40 +01005147
Paul Bakker14926332012-11-20 10:58:09 +01005148= Version 1.2.1 released 2012-11-20
Paul Bakker34d8dbc2012-11-14 12:11:38 +00005149Changes
5150 * Depth that the certificate verify callback receives is now numbered
5151 bottom-up (Peer cert depth is 0)
5152
Paul Bakker7a2538e2012-11-02 10:59:36 +00005153Bugfixes
5154 * Fixes for MSVC6
Paul Bakkerd9374b02012-11-02 11:02:58 +00005155 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
Paul Bakkerf02c5642012-11-13 10:25:21 +00005156 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
5157 Pégourié-Gonnard)
Manuel Pégourié-Gonnarde44ec102012-11-17 12:42:51 +01005158 * Fixed possible segfault in mpi_shift_r() (found by Manuel
5159 Pégourié-Gonnard)
Paul Bakker9daf0d02012-11-13 12:13:27 +00005160 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
Paul Bakker7a2538e2012-11-02 10:59:36 +00005161
Paul Bakkerc9c5df92012-10-31 13:55:27 +00005162= Version 1.2.0 released 2012-10-31
Paul Bakkerfab5c822012-02-06 16:45:10 +00005163Features
5164 * Added support for NULL cipher (POLARSSL_CIPHER_NULL_CIPHER) and weak
5165 ciphersuites (POLARSSL_ENABLE_WEAK_CIPHERSUITES). They are disabled by
5166 default!
Paul Bakkera8cd2392012-02-11 16:09:32 +00005167 * Added support for wildcard certificates
5168 * Added support for multi-domain certificates through the X509 Subject
5169 Alternative Name extension
Paul Bakkerbdb912d2012-02-13 23:11:30 +00005170 * Added preliminary ASN.1 buffer writing support
5171 * Added preliminary X509 Certificate Request writing support
5172 * Added key_app_writer example application
5173 * Added cert_req example application
Paul Bakker89e80c92012-03-20 13:50:09 +00005174 * Added base Galois Counter Mode (GCM) for AES
Paul Bakker48916f92012-09-16 19:57:18 +00005175 * Added TLS 1.2 support (RFC 5246)
Paul Bakkerca4ab492012-04-18 14:23:57 +00005176 * Added GCM suites to TLS 1.2 (RFC 5288)
Paul Bakker01cc3942012-05-08 08:36:15 +00005177 * Added commandline error code convertor (util/strerror)
Paul Bakker05ef8352012-05-08 09:17:57 +00005178 * Added support for Hardware Acceleration hooking in SSL/TLS
Paul Bakkere6ee41f2012-05-19 08:43:48 +00005179 * Added OpenSSL / PolarSSL compatibility script (tests/compat.sh) and
Paul Bakkerc9c5df92012-10-31 13:55:27 +00005180 example application (programs/ssl/o_p_test) (requires OpenSSL)
Paul Bakker8d914582012-06-04 12:46:42 +00005181 * Added X509 CA Path support
Paul Bakker4f9a7bb2012-07-02 08:36:36 +00005182 * Added Thumb assembly optimizations
Paul Bakker2770fbd2012-07-03 13:30:23 +00005183 * Added DEFLATE compression support as per RFC3749 (requires zlib)
Paul Bakker6132d0a2012-07-04 17:10:40 +00005184 * Added blowfish algorithm (Generic and cipher layer)
Paul Bakkerf518b162012-08-23 13:03:18 +00005185 * Added PKCS#5 PBKDF2 key derivation function
Paul Bakker48916f92012-09-16 19:57:18 +00005186 * Added Secure Renegotiation (RFC 5746)
Paul Bakker29b64762012-09-25 09:36:44 +00005187 * Added predefined DHM groups from RFC 5114
Paul Bakker0a597072012-09-25 21:55:46 +00005188 * Added simple SSL session cache implementation
Paul Bakker5701cdc2012-09-27 21:49:42 +00005189 * Added ServerName extension parsing (SNI) at server side
Paul Bakker1d29fb52012-09-28 13:28:45 +00005190 * Added option to add minimum accepted SSL/TLS protocol version
Paul Bakkerfab5c822012-02-06 16:45:10 +00005191
Paul Bakker1504af52012-02-11 16:17:43 +00005192Changes
5193 * Removed redundant POLARSSL_DEBUG_MSG define
Paul Bakker048d04e2012-02-12 17:31:04 +00005194 * AES code only check for Padlock once
Paul Bakker6b906e52012-05-08 12:01:43 +00005195 * Fixed const-correctness mpi_get_bit()
5196 * Documentation for mpi_lsb() and mpi_msb()
Paul Bakker186751d2012-05-08 13:16:14 +00005197 * Moved out_msg to out_hdr + 32 to support hardware acceleration
Paul Bakker4d2c1242012-05-10 14:12:46 +00005198 * Changed certificate verify behaviour to comply with RFC 6125 section 6.3
Paul Bakker5b377842012-05-16 07:57:36 +00005199 to not match CN if subjectAltName extension is present (Closes ticket #56)
Paul Bakker6132d0a2012-07-04 17:10:40 +00005200 * Cipher layer cipher_mode_t POLARSSL_MODE_CFB128 is renamed to
5201 POLARSSL_MODE_CFB, to also handle different block size CFB modes.
Paul Bakkerec636f32012-09-09 19:17:02 +00005202 * Removed handling for SSLv2 Client Hello (as per RFC 5246 recommendation)
Paul Bakker0a597072012-09-25 21:55:46 +00005203 * Revamped session resumption handling
Paul Bakkereb2c6582012-09-27 19:15:01 +00005204 * Generalized external private key implementation handling (like PKCS#11)
5205 in SSL/TLS
Paul Bakker915275b2012-09-28 07:10:55 +00005206 * Revamped x509_verify() and the SSL f_vrfy callback implementations
Paul Bakker5c2364c2012-10-01 14:41:15 +00005207 * Moved from unsigned long to fixed width uint32_t types throughout code
Paul Bakker645ce3a2012-10-31 12:32:41 +00005208 * Renamed ciphersuites naming scheme to IANA reserved names
Paul Bakker1504af52012-02-11 16:17:43 +00005209
Paul Bakker37824582012-03-22 14:10:22 +00005210Bugfix
Paul Bakker7beceb22012-03-22 14:19:49 +00005211 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
5212 Hui Dong)
Paul Bakker430ffbe2012-05-01 08:14:20 +00005213 * Fixed potential heap corruption in x509_name allocation
Paul Bakker5b377842012-05-16 07:57:36 +00005214 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
Paul Bakkerf6198c12012-05-16 08:02:29 +00005215 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
5216 #52)
Paul Bakkere6ee41f2012-05-19 08:43:48 +00005217 * Handle encryption with private key and decryption with public key as per
Darryl Green11999bb2018-03-13 15:22:58 +00005218 RFC 2313
Paul Bakkercefb3962012-06-27 11:51:09 +00005219 * Handle empty certificate subject names
Paul Bakker535e97d2012-08-23 10:49:55 +00005220 * Prevent reading over buffer boundaries on X509 certificate parsing
Paul Bakkerd4c2bd72012-09-16 21:35:30 +00005221 * mpi_add_abs() now correctly handles adding short numbers to long numbers
Paul Bakker995a2152012-09-25 08:19:56 +00005222 with carry rollover (found by Ruslan Yushchenko)
Paul Bakkerb00ca422012-09-25 12:10:00 +00005223 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
Paul Bakker4f024b72012-10-30 07:29:57 +00005224 * Fixed MPI assembly for SPARC64 platform
Paul Bakker37824582012-03-22 14:10:22 +00005225
Paul Bakker452d5322012-04-05 12:07:34 +00005226Security
Paul Bakker3c16db92012-07-05 13:58:08 +00005227 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
5228 Vanderbeken)
Paul Bakker452d5322012-04-05 12:07:34 +00005229
Paul Bakkerd93d28e2013-10-01 10:12:42 +02005230= Version 1.1.8 released on 2013-10-01
Paul Bakkerc13aab12013-09-26 10:12:19 +02005231Bugfix
5232 * Fixed potential memory leak when failing to resume a session
5233 * Fixed potential file descriptor leaks
5234
5235Security
5236 * Potential buffer-overflow for ssl_read_record() (independently found by
5237 both TrustInSoft and Paul Brodeur of Leviathan Security Group)
5238 * Potential negative value misinterpretation in load_file()
5239 * Potential heap buffer overflow on large hostname setting
5240
Paul Bakker248fff52013-06-24 19:08:50 +02005241= Version 1.1.7 released on 2013-06-19
5242Changes
5243 * HAVEGE random generator disabled by default
5244
5245Bugfix
5246 * x509parse_crt() now better handles PEM error situations
5247 * ssl_parse_certificate() now calls x509parse_crt_der() directly
5248 instead of the x509parse_crt() wrapper that can also parse PEM
Darryl Green11999bb2018-03-13 15:22:58 +00005249 certificates
Paul Bakker248fff52013-06-24 19:08:50 +02005250 * Fixed values for 2-key Triple DES in cipher layer
5251 * ssl_write_certificate_request() can handle empty ca_chain
5252
5253Security
5254 * A possible DoS during the SSL Handshake, due to faulty parsing of
5255 PEM-encoded certificates has been fixed (found by Jack Lloyd)
5256
5257= Version 1.1.6 released on 2013-03-11
5258Bugfix
5259 * Fixed net_bind() for specified IP addresses on little endian systems
5260
5261Changes
5262 * Allow enabling of dummy error_strerror() to support some use-cases
5263 * Debug messages about padding errors during SSL message decryption are
5264 disabled by default and can be enabled with POLARSSL_SSL_DEBUG_ALL
5265
5266Security
5267 * Removed timing differences during SSL message decryption in
5268 ssl_decrypt_buf()
5269 * Removed timing differences due to bad padding from
5270 rsa_rsaes_pkcs1_v15_decrypt() and rsa_pkcs1_decrypt() for PKCS#1 v1.5
5271 operations
5272
Paul Bakker9d2bb652013-01-25 16:07:49 +01005273= Version 1.1.5 released on 2013-01-16
5274Bugfix
5275 * Fixed MPI assembly for SPARC64 platform
5276 * Handle existence of OpenSSL Trust Extensions at end of X.509 DER blob
5277 * mpi_add_abs() now correctly handles adding short numbers to long numbers
5278 with carry rollover
5279 * Moved mpi_inv_mod() outside POLARSSL_GENPRIME
5280 * Prevent reading over buffer boundaries on X509 certificate parsing
5281 * mpi_exp_mod() now correctly handles negative base numbers (Closes ticket
5282 #52)
5283 * Fixed possible segfault in mpi_shift_r() (found by Manuel
5284 Pégourié-Gonnard)
5285 * Allow R and A to point to same mpi in mpi_div_mpi (found by Manuel
5286 Pégourié-Gonnard)
5287 * Added max length check for rsa_pkcs1_sign with PKCS#1 v2.1
5288 * Memory leak when using RSA_PKCS_V21 operations fixed
5289 * Handle encryption with private key and decryption with public key as per
5290 RFC 2313
5291 * Fixes for MSVC6
5292
5293Security
5294 * Fixed potential memory zeroization on miscrafted RSA key (found by Eloi
5295 Vanderbeken)
5296
Paul Bakkerd5834bb2012-10-02 14:38:56 +00005297= Version 1.1.4 released on 2012-05-31
5298Bugfix
5299 * Correctly handle empty SSL/TLS packets (Found by James Yonan)
5300 * Fixed potential heap corruption in x509_name allocation
5301 * Fixed single RSA test that failed on Big Endian systems (Closes ticket #54)
5302
Paul Bakkerfad38932012-05-08 09:04:04 +00005303= Version 1.1.3 released on 2012-04-29
5304Bugfix
5305 * Fixed random MPI generation to not generate more size than requested.
5306
5307= Version 1.1.2 released on 2012-04-26
5308Bugfix
5309 * Fixed handling error in mpi_cmp_mpi() on longer B values (found by
5310 Hui Dong)
5311
5312Security
5313 * Fixed potential memory corruption on miscrafted client messages (found by
5314 Frama-C team at CEA LIST)
5315 * Fixed generation of DHM parameters to correct length (found by Ruslan
5316 Yushchenko)
5317
Paul Bakker99955bf2012-01-23 09:31:41 +00005318= Version 1.1.1 released on 2012-01-23
Paul Bakkerb15b8512012-01-13 13:44:06 +00005319Bugfix
5320 * Check for failed malloc() in ssl_set_hostname() and x509_get_entries()
5321 (Closes ticket #47, found by Hugo Leisink)
Paul Bakker2ec0a562012-01-21 05:41:23 +00005322 * Fixed issues with Intel compiler on 64-bit systems (Closes ticket #50)
Paul Bakker99955bf2012-01-23 09:31:41 +00005323 * Fixed multiple compiler warnings for VS6 and armcc
5324 * Fixed bug in CTR_CRBG selftest
Paul Bakkerb15b8512012-01-13 13:44:06 +00005325
Paul Bakker08a50882011-12-22 09:43:57 +00005326= Version 1.1.0 released on 2011-12-22
Paul Bakker7eb013f2011-10-06 12:37:39 +00005327Features
5328 * Added ssl_session_reset() to allow better multi-connection pools of
5329 SSL contexts without needing to set all non-connection-specific
Darryl Green11999bb2018-03-13 15:22:58 +00005330 data and pointers again. Adapted ssl_server to use this functionality.
Paul Bakker490ecc82011-10-06 13:04:09 +00005331 * Added ssl_set_max_version() to allow clients to offer a lower maximum
5332 supported version to a server to help buggy server implementations.
Darryl Green11999bb2018-03-13 15:22:58 +00005333 (Closes ticket #36)
Paul Bakker03a30d32011-11-11 10:55:02 +00005334 * Added cipher_get_cipher_mode() and cipher_get_cipher_operation()
5335 introspection functions (Closes ticket #40)
Paul Bakker0e04d0e2011-11-27 14:46:59 +00005336 * Added CTR_DRBG based on AES-256-CTR (NIST SP 800-90) random generator
Paul Bakker6083fd22011-12-03 21:45:14 +00005337 * Added a generic entropy accumulator that provides support for adding
5338 custom entropy sources and added some generic and platform dependent
Darryl Green11999bb2018-03-13 15:22:58 +00005339 entropy sources
Paul Bakker7eb013f2011-10-06 12:37:39 +00005340
Paul Bakkerca6f3e22011-10-06 13:11:08 +00005341Changes
5342 * Documentation for AES and Camellia in modes CTR and CFB128 clarified.
Paul Bakkerd246ed32011-10-06 13:18:27 +00005343 * Fixed rsa_encrypt and rsa_decrypt examples to use public key for
5344 encryption and private key for decryption. (Closes ticket #34)
Paul Bakkerc4909d92011-10-12 09:52:22 +00005345 * Inceased maximum size of ASN1 length reads to 32-bits.
Paul Bakkerfbc09f32011-10-12 09:56:41 +00005346 * Added an EXPLICIT tag number parameter to x509_get_ext()
Paul Bakkerb5a11ab2011-10-12 09:58:41 +00005347 * Added a separate CRL entry extension parsing function
Paul Bakkerefc30292011-11-10 14:43:23 +00005348 * Separated the ASN.1 parsing code from the X.509 specific parsing code.
5349 So now there is a module that is controlled with POLARSSL_ASN1_PARSE_C.
Paul Bakker5e18aed2011-11-15 15:38:45 +00005350 * Changed the defined key-length of DES ciphers in cipher.h to include the
5351 parity bits, to prevent mistakes in copying data. (Closes ticket #33)
Paul Bakkercce9d772011-11-18 14:26:47 +00005352 * Loads of minimal changes to better support WINCE as a build target
Paul Bakker2e6d5322011-11-18 14:34:17 +00005353 (Credits go to Marco Lizza)
Paul Bakkerb6d5f082011-11-25 11:52:11 +00005354 * Added POLARSSL_MPI_WINDOW_SIZE definition to allow easier time to memory
5355 trade-off
Paul Bakkerfe3256e2011-11-25 12:11:43 +00005356 * Introduced POLARSSL_MPI_MAX_SIZE and POLARSSL_MPI_MAX_BITS for MPI size
5357 management (Closes ticket #44)
Paul Bakkera3d195c2011-11-27 21:07:34 +00005358 * Changed the used random function pointer to more flexible format. Renamed
5359 havege_rand() to havege_random() to prevent mistakes. Lots of changes as
Paul Bakkera35aa542013-03-06 17:06:21 +01005360 a consequence in library code and programs
Paul Bakker508ad5a2011-12-04 17:09:26 +00005361 * Moved all examples programs to use the new entropy and CTR_DRBG
Paul Bakker6c0ceb32011-12-04 12:24:18 +00005362 * Added permissive certificate parsing to x509parse_crt() and
5363 x509parse_crtfile(). With permissive parsing the parsing does not stop on
Paul Bakkera35aa542013-03-06 17:06:21 +01005364 encountering a parse-error. Beware that the meaning of return values has
5365 changed!
Paul Bakker69e095c2011-12-10 21:55:01 +00005366 * All error codes are now negative. Even on mermory failures and IO errors.
Paul Bakkerca6f3e22011-10-06 13:11:08 +00005367
Paul Bakkerfa1c5922011-10-06 14:18:49 +00005368Bugfix
5369 * Fixed faulty HMAC-MD2 implementation. Found by dibac. (Closes
5370 ticket #37)
Paul Bakker3329d1f2011-10-12 09:55:01 +00005371 * Fixed a bug where the CRL parser expected an EXPLICIT ASN.1 tag
5372 before version numbers
Paul Bakkercebdf172011-11-11 15:01:31 +00005373 * Allowed X509 key usage parsing to accept 4 byte values instead of the
5374 standard 1 byte version sometimes used by Microsoft. (Closes ticket #38)
Paul Bakker1fe7d9b2011-11-15 15:26:03 +00005375 * Fixed incorrect behaviour in case of RSASSA-PSS with a salt length
5376 smaller than the hash length. (Closes ticket #41)
Paul Bakker03c7c252011-11-25 12:37:37 +00005377 * If certificate serial is longer than 32 octets, serial number is now
5378 appended with '....' after first 28 octets
Paul Bakker44637402011-11-26 09:23:07 +00005379 * Improved build support for s390x and sparc64 in bignum.h
Paul Bakker4f5ae802011-12-04 22:10:28 +00005380 * Fixed MS Visual C++ name clash with int64 in sha4.h
Paul Bakkerc50132d2011-12-05 14:38:36 +00005381 * Corrected removal of leading "00:" in printing serial numbers in
Paul Bakkerc8ffbe72011-12-05 14:22:49 +00005382 certificates and CRLs
Paul Bakkerfa1c5922011-10-06 14:18:49 +00005383
Paul Bakker968bc982011-07-27 17:03:00 +00005384= Version 1.0.0 released on 2011-07-27
Paul Bakker343a8702011-06-09 14:27:58 +00005385Features
5386 * Expanded cipher layer with support for CFB128 and CTR mode
Paul Bakker7bc05ff2011-08-09 10:30:36 +00005387 * Added rsa_encrypt and rsa_decrypt simple example programs.
Paul Bakker343a8702011-06-09 14:27:58 +00005388
Paul Bakker42e59812011-06-09 15:55:41 +00005389Changes
5390 * The generic cipher and message digest layer now have normal error
5391 codes instead of integers
5392
Paul Bakker887bd502011-06-08 13:10:54 +00005393Bugfix
5394 * Undid faulty bug fix in ssl_write() when flushing old data (Ticket
5395 #18)
5396
Paul Bakker828acb22011-05-27 09:25:42 +00005397= Version 0.99-pre5 released on 2011-05-26
Paul Bakkerb6ecaf52011-04-19 14:29:23 +00005398Features
5399 * Added additional Cipher Block Modes to symmetric ciphers
5400 (AES CTR, Camellia CTR, XTEA CBC) including the option to
Paul Bakkera35aa542013-03-06 17:06:21 +01005401 enable and disable individual modes when needed
Paul Bakker335db3f2011-04-25 15:28:35 +00005402 * Functions requiring File System functions can now be disabled
5403 by undefining POLARSSL_FS_IO
Paul Bakker9d781402011-05-09 16:17:09 +00005404 * A error_strerror function() has been added to translate between
5405 error codes and their description.
Paul Bakker2f5947e2011-05-18 15:47:11 +00005406 * Added mpi_get_bit() and mpi_set_bit() individual bit setter/getter
5407 functions.
Paul Bakker1496d382011-05-23 12:07:29 +00005408 * Added ssl_mail_client and ssl_fork_server as example programs.
Paul Bakkerb6ecaf52011-04-19 14:29:23 +00005409
Paul Bakker23986e52011-04-24 08:57:21 +00005410Changes
5411 * Major argument / variable rewrite. Introduced use of size_t
5412 instead of int for buffer lengths and loop variables for
Paul Bakkera35aa542013-03-06 17:06:21 +01005413 better unsigned / signed use. Renamed internal bigint types
5414 t_int and t_dbl to t_uint and t_udbl in the process
Paul Bakker6c591fa2011-05-05 11:49:20 +00005415 * mpi_init() and mpi_free() now only accept a single MPI
5416 argument and do not accept variable argument lists anymore.
Paul Bakker9d781402011-05-09 16:17:09 +00005417 * The error codes have been remapped and combining error codes
5418 is now done with a PLUS instead of an OR as error codes
Paul Bakkera35aa542013-03-06 17:06:21 +01005419 used are negative.
Paul Bakker831a7552011-05-18 13:32:51 +00005420 * Changed behaviour of net_read(), ssl_fetch_input() and ssl_recv().
5421 net_recv() now returns 0 on EOF instead of
Paul Bakkera35aa542013-03-06 17:06:21 +01005422 POLARSSL_ERR_NET_CONN_RESET. ssl_fetch_input() returns
5423 POLARSSL_ERR_SSL_CONN_EOF on an EOF from its f_recv() function.
5424 ssl_read() returns 0 if a POLARSSL_ERR_SSL_CONN_EOF is received
5425 after the handshake.
Paul Bakker831a7552011-05-18 13:32:51 +00005426 * Network functions now return POLARSSL_ERR_NET_WANT_READ or
5427 POLARSSL_ERR_NET_WANT_WRITE instead of the ambiguous
Paul Bakkera35aa542013-03-06 17:06:21 +01005428 POLARSSL_ERR_NET_TRY_AGAIN
Paul Bakker23986e52011-04-24 08:57:21 +00005429
Paul Bakker3efa5752011-04-01 12:23:26 +00005430= Version 0.99-pre4 released on 2011-04-01
Paul Bakker9dcc3222011-03-08 14:16:06 +00005431Features
5432 * Added support for PKCS#1 v2.1 encoding and thus support
5433 for the RSAES-OAEP and RSASSA-PSS operations.
Paul Bakkere77db2e2011-03-25 14:01:32 +00005434 * Reading of Public Key files incorporated into default x509
5435 functionality as well.
Paul Bakker287781a2011-03-26 13:18:49 +00005436 * Added mpi_fill_random() for centralized filling of big numbers
5437 with random data (Fixed ticket #10)
Paul Bakker9dcc3222011-03-08 14:16:06 +00005438
Paul Bakkerbe4e7dc2011-03-14 20:41:31 +00005439Changes
Hanno Becker01a0e072017-07-26 11:49:40 +01005440 * Debug print of MPI now removes leading zero octets and
Paul Bakkerbe4e7dc2011-03-14 20:41:31 +00005441 displays actual bit size of the value.
Hanno Becker01a0e072017-07-26 11:49:40 +01005442 * x509parse_key() (and as a consequence x509parse_keyfile())
Paul Bakker98675492011-03-26 13:17:12 +00005443 does not zeroize memory in advance anymore. Use rsa_init()
Paul Bakkera35aa542013-03-06 17:06:21 +01005444 before parsing a key or keyfile!
Paul Bakkerbe4e7dc2011-03-14 20:41:31 +00005445
5446Bugfix
5447 * Debug output of MPI's now the same independent of underlying
5448 platform (32-bit / 64-bit) (Fixes ticket #19, found by Mads
Paul Bakkera35aa542013-03-06 17:06:21 +01005449 Kiilerich and Mihai Militaru)
Paul Bakker1fd00bf2011-03-14 20:50:15 +00005450 * Fixed bug in ssl_write() when flushing old data (Fixed ticket
5451 #18, found by Nikolay Epifanov)
Paul Bakkere77db2e2011-03-25 14:01:32 +00005452 * Fixed proper handling of RSASSA-PSS verification with variable
5453 length salt lengths
Paul Bakkerbe4e7dc2011-03-14 20:41:31 +00005454
Paul Bakker345a6fe2011-02-28 21:20:02 +00005455= Version 0.99-pre3 released on 2011-02-28
5456This release replaces version 0.99-pre2 which had possible copyright issues.
Paul Bakker96743fc2011-02-12 14:30:57 +00005457Features
5458 * Parsing PEM private keys encrypted with DES and AES
5459 are now supported as well (Fixes ticket #5)
Paul Bakkera9507c02011-02-12 15:27:28 +00005460 * Added crl_app program to allow easy reading and
5461 printing of X509 CRLs from file
Paul Bakker96743fc2011-02-12 14:30:57 +00005462
5463Changes
Hanno Becker01a0e072017-07-26 11:49:40 +01005464 * Parsing of PEM files moved to separate module (Fixes
Paul Bakker96743fc2011-02-12 14:30:57 +00005465 ticket #13). Also possible to remove PEM support for
Paul Bakkera35aa542013-03-06 17:06:21 +01005466 systems only using DER encoding
Paul Bakker96743fc2011-02-12 14:30:57 +00005467
Paul Bakker400ff6f2011-02-20 10:40:16 +00005468Bugfixes
5469 * Corrected parsing of UTCTime dates before 1990 and
5470 after 1950
5471 * Support more exotic OID's when parsing certificates
Darryl Green11999bb2018-03-13 15:22:58 +00005472 (found by Mads Kiilerich)
Paul Bakker400ff6f2011-02-20 10:40:16 +00005473 * Support more exotic name representations when parsing
Paul Bakkere2a39cc2011-02-20 13:49:27 +00005474 certificates (found by Mads Kiilerich)
Paul Bakker400ff6f2011-02-20 10:40:16 +00005475 * Replaced the expired test certificates
Paul Bakkere2a39cc2011-02-20 13:49:27 +00005476 * Do not bail out if no client certificate specified. Try
5477 to negotiate anonymous connection (Fixes ticket #12,
Paul Bakkera35aa542013-03-06 17:06:21 +01005478 found by Boris Krasnovskiy)
Paul Bakker400ff6f2011-02-20 10:40:16 +00005479
Paul Bakker345a6fe2011-02-28 21:20:02 +00005480Security fixes
5481 * Fixed a possible Man-in-the-Middle attack on the
5482 Diffie Hellman key exchange (thanks to Larry Highsmith,
Paul Bakkera35aa542013-03-06 17:06:21 +01005483 Subreption LLC)
Paul Bakker345a6fe2011-02-28 21:20:02 +00005484
Paul Bakker9fc46592011-01-30 16:59:02 +00005485= Version 0.99-pre1 released on 2011-01-30
Paul Bakker37ca75d2011-01-06 12:28:03 +00005486Features
Paul Bakkerb63b0af2011-01-13 17:54:59 +00005487Note: Most of these features have been donated by Fox-IT
5488 * Added Doxygen source code documentation parts
Paul Bakker1b57b062011-01-06 15:48:19 +00005489 * Added reading of DHM context from memory and file
Paul Bakker74111d32011-01-15 16:57:55 +00005490 * Improved X509 certificate parsing to include extended
Paul Bakker76fd75a2011-01-16 21:12:10 +00005491 certificate fields, including Key Usage
5492 * Improved certificate verification and verification
5493 against the available CRLs
Paul Bakker1f87fb62011-01-15 17:32:24 +00005494 * Detection for DES weak keys and parity bits added
Paul Bakker72f62662011-01-16 21:27:44 +00005495 * Improvements to support integration in other
5496 applications:
5497 + Added generic message digest and cipher wrapper
5498 + Improved information about current capabilities,
5499 status, objects and configuration
5500 + Added verification callback on certificate chain
5501 verification to allow external blacklisting
Darryl Green11999bb2018-03-13 15:22:58 +00005502 + Additional example programs to show usage
Paul Bakker43b7e352011-01-18 15:27:19 +00005503 * Added support for PKCS#11 through the use of the
5504 libpkcs11-helper library
Paul Bakker37ca75d2011-01-06 12:28:03 +00005505
Paul Bakkerb6194992011-01-16 21:40:22 +00005506Changes
5507 * x509parse_time_expired() checks time in addition to
5508 the existing date check
Paul Bakkere3166ce2011-01-27 17:40:50 +00005509 * The ciphers member of ssl_context and the cipher member
5510 of ssl_session have been renamed to ciphersuites and
Paul Bakkera35aa542013-03-06 17:06:21 +01005511 ciphersuite respectively. This clarifies the difference
5512 with the generic cipher layer and is better naming
5513 altogether
Paul Bakkerb6194992011-01-16 21:40:22 +00005514
Paul Bakker99ed6782011-01-05 14:48:42 +00005515= Version 0.14.0 released on 2010-08-16
5516Features
5517 * Added support for SSL_EDH_RSA_AES_128_SHA and
5518 SSL_EDH_RSA_CAMELLIA_128_SHA ciphersuites
5519 * Added compile-time and run-time version information
5520 * Expanded ssl_client2 arguments for more flexibility
5521 * Added support for TLS v1.1
5522
5523Changes
5524 * Made Makefile cleaner
5525 * Removed dependency on rand() in rsa_pkcs1_encrypt().
5526 Now using random fuction provided to function and
Paul Bakkera35aa542013-03-06 17:06:21 +01005527 changed the prototype of rsa_pkcs1_encrypt(),
5528 rsa_init() and rsa_gen_key().
Paul Bakker99ed6782011-01-05 14:48:42 +00005529 * Some SSL defines were renamed in order to avoid
5530 future confusion
5531
5532Bug fixes
5533 * Fixed CMake out of source build for tests (found by
5534 kkert)
5535 * rsa_check_private() now supports PKCS1v2 keys as well
5536 * Fixed deadlock in rsa_pkcs1_encrypt() on failing random
5537 generator
5538
5539= Version 0.13.1 released on 2010-03-24
5540Bug fixes
5541 * Fixed Makefile in library that was mistakenly merged
5542 * Added missing const string fixes
5543
5544= Version 0.13.0 released on 2010-03-21
5545Features
5546 * Added option parsing for host and port selection to
5547 ssl_client2
5548 * Added support for GeneralizedTime in X509 parsing
5549 * Added cert_app program to allow easy reading and
5550 printing of X509 certificates from file or SSL
5551 connection.
5552
5553Changes
5554 * Added const correctness for main code base
5555 * X509 signature algorithm determination is now
5556 in a function to allow easy future expansion
5557 * Changed symmetric cipher functions to
5558 identical interface (returning int result values)
Paul Bakker60b1d102013-10-29 10:02:51 +01005559 * Changed ARC4 to use separate input/output buffer
Paul Bakker99ed6782011-01-05 14:48:42 +00005560 * Added reset function for HMAC context as speed-up
5561 for specific use-cases
5562
5563Bug fixes
5564 * Fixed bug resulting in failure to send the last
5565 certificate in the chain in ssl_write_certificate() and
5566 ssl_write_certificate_request() (found by fatbob)
5567 * Added small fixes for compiler warnings on a Mac
5568 (found by Frank de Brabander)
5569 * Fixed algorithmic bug in mpi_is_prime() (found by
5570 Smbat Tonoyan)
5571
5572= Version 0.12.1 released on 2009-10-04
5573Changes
5574 * Coverage test definitions now support 'depends_on'
5575 tagging system.
5576 * Tests requiring specific hashing algorithms now honor
5577 the defines.
5578
5579Bug fixes
5580 * Changed typo in #ifdef in x509parse.c (found
5581 by Eduardo)
5582
5583= Version 0.12.0 released on 2009-07-28
5584Features
5585 * Added CMake makefiles as alternative to regular Makefiles.
5586 * Added preliminary Code Coverage tests for AES, ARC4,
5587 Base64, MPI, SHA-family, MD-family, HMAC-SHA-family,
5588 Camellia, DES, 3-DES, RSA PKCS#1, XTEA, Diffie-Hellman
5589 and X509parse.
5590
5591Changes
5592 * Error codes are not (necessarily) negative. Keep
5593 this is mind when checking for errors.
5594 * RSA_RAW renamed to SIG_RSA_RAW for consistency.
5595 * Fixed typo in name of POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE.
5596 * Changed interface for AES and Camellia setkey functions
5597 to indicate invalid key lengths.
5598
5599Bug fixes
5600 * Fixed include location of endian.h on FreeBSD (found by
5601 Gabriel)
5602 * Fixed include location of endian.h and name clash on
5603 Apples (found by Martin van Hensbergen)
5604 * Fixed HMAC-MD2 by modifying md2_starts(), so that the
5605 required HMAC ipad and opad variables are not cleared.
5606 (found by code coverage tests)
Hanno Becker01a0e072017-07-26 11:49:40 +01005607 * Prevented use of long long in bignum if
Paul Bakker99ed6782011-01-05 14:48:42 +00005608 POLARSSL_HAVE_LONGLONG not defined (found by Giles
5609 Bathgate).
5610 * Fixed incorrect handling of negative strings in
5611 mpi_read_string() (found by code coverage tests).
5612 * Fixed segfault on handling empty rsa_context in
5613 rsa_check_pubkey() and rsa_check_privkey() (found by
5614 code coverage tests).
5615 * Fixed incorrect handling of one single negative input
5616 value in mpi_add_abs() (found by code coverage tests).
5617 * Fixed incorrect handling of negative first input
5618 value in mpi_sub_abs() (found by code coverage tests).
5619 * Fixed incorrect handling of negative first input
5620 value in mpi_mod_mpi() and mpi_mod_int(). Resulting
5621 change also affects mpi_write_string() (found by code
5622 coverage tests).
5623 * Corrected is_prime() results for 0, 1 and 2 (found by
5624 code coverage tests).
5625 * Fixed Camellia and XTEA for 64-bit Windows systems.
5626
5627= Version 0.11.1 released on 2009-05-17
5628 * Fixed missing functionality for SHA-224, SHA-256, SHA384,
5629 SHA-512 in rsa_pkcs1_sign()
5630
5631= Version 0.11.0 released on 2009-05-03
5632 * Fixed a bug in mpi_gcd() so that it also works when both
5633 input numbers are even and added testcases to check
5634 (found by Pierre Habouzit).
5635 * Added support for SHA-224, SHA-256, SHA-384 and SHA-512
5636 one way hash functions with the PKCS#1 v1.5 signing and
5637 verification.
5638 * Fixed minor bug regarding mpi_gcd located within the
5639 POLARSSL_GENPRIME block.
5640 * Fixed minor memory leak in x509parse_crt() and added better
5641 handling of 'full' certificate chains (found by Mathias
5642 Olsson).
5643 * Centralized file opening and reading for x509 files into
5644 load_file()
5645 * Made definition of net_htons() endian-clean for big endian
5646 systems (Found by Gernot).
5647 * Undefining POLARSSL_HAVE_ASM now also handles prevents asm in
Hanno Becker01a0e072017-07-26 11:49:40 +01005648 padlock and timing code.
Paul Bakker99ed6782011-01-05 14:48:42 +00005649 * Fixed an off-by-one buffer allocation in ssl_set_hostname()
5650 responsible for crashes and unwanted behaviour.
5651 * Added support for Certificate Revocation List (CRL) parsing.
5652 * Added support for CRL revocation to x509parse_verify() and
5653 SSL/TLS code.
5654 * Fixed compatibility of XTEA and Camellia on a 64-bit system
5655 (found by Felix von Leitner).
5656
5657= Version 0.10.0 released on 2009-01-12
5658 * Migrated XySSL to PolarSSL
5659 * Added XTEA symmetric cipher
5660 * Added Camellia symmetric cipher
5661 * Added support for ciphersuites: SSL_RSA_CAMELLIA_128_SHA,
5662 SSL_RSA_CAMELLIA_256_SHA and SSL_EDH_RSA_CAMELLIA_256_SHA
5663 * Fixed dangerous bug that can cause a heap overflow in
5664 rsa_pkcs1_decrypt (found by Christophe Devine)
5665
5666================================================================
5667XySSL ChangeLog
5668
5669= Version 0.9 released on 2008-03-16
5670
5671 * Added support for ciphersuite: SSL_RSA_AES_128_SHA
5672 * Enabled support for large files by default in aescrypt2.c
5673 * Preliminary openssl wrapper contributed by David Barrett
5674 * Fixed a bug in ssl_write() that caused the same payload to
5675 be sent twice in non-blocking mode when send returns EAGAIN
5676 * Fixed ssl_parse_client_hello(): session id and challenge must
5677 not be swapped in the SSLv2 ClientHello (found by Greg Robson)
5678 * Added user-defined callback debug function (Krystian Kolodziej)
5679 * Before freeing a certificate, properly zero out all cert. data
5680 * Fixed the "mode" parameter so that encryption/decryption are
5681 not swapped on PadLock; also fixed compilation on older versions
5682 of gcc (bug reported by David Barrett)
5683 * Correctly handle the case in padlock_xcryptcbc() when input or
Antonin Décimo36e89b52019-01-23 15:24:37 +01005684 output data is non-aligned by falling back to the software
Paul Bakker99ed6782011-01-05 14:48:42 +00005685 implementation, as VIA Nehemiah cannot handle non-aligned buffers
5686 * Fixed a memory leak in x509parse_crt() which was reported by Greg
5687 Robson-Garth; some x509write.c fixes by Pascal Vizeli, thanks to
5688 Matthew Page who reported several bugs
5689 * Fixed x509_get_ext() to accept some rare certificates which have
5690 an INTEGER instead of a BOOLEAN for BasicConstraints::cA.
5691 * Added support on the client side for the TLS "hostname" extension
5692 (patch contributed by David Patino)
5693 * Make x509parse_verify() return BADCERT_CN_MISMATCH when an empty
5694 string is passed as the CN (bug reported by spoofy)
5695 * Added an option to enable/disable the BN assembly code
5696 * Updated rsa_check_privkey() to verify that (D*E) = 1 % (P-1)*(Q-1)
5697 * Disabled obsolete hash functions by default (MD2, MD4); updated
5698 selftest and benchmark to not test ciphers that have been disabled
5699 * Updated x509parse_cert_info() to correctly display byte 0 of the
5700 serial number, setup correct server port in the ssl client example
5701 * Fixed a critical denial-of-service with X.509 cert. verification:
5702 peer may cause xyssl to loop indefinitely by sending a certificate
5703 for which the RSA signature check fails (bug reported by Benoit)
5704 * Added test vectors for: AES-CBC, AES-CFB, DES-CBC and 3DES-CBC,
5705 HMAC-MD5, HMAC-SHA1, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512
5706 * Fixed HMAC-SHA-384 and HMAC-SHA-512 (thanks to Josh Sinykin)
5707 * Modified ssl_parse_client_key_exchange() to protect against
5708 Daniel Bleichenbacher attack on PKCS#1 v1.5 padding, as well
5709 as the Klima-Pokorny-Rosa extension of Bleichenbacher's attack
5710 * Updated rsa_gen_key() so that ctx->N is always nbits in size
5711 * Fixed assembly PPC compilation errors on Mac OS X, thanks to
5712 David Barrett and Dusan Semen
5713
5714= Version 0.8 released on 2007-10-20
5715
5716 * Modified the HMAC functions to handle keys larger
5717 than 64 bytes, thanks to Stephane Desneux and gary ng
5718 * Fixed ssl_read_record() to properly update the handshake
5719 message digests, which fixes IE6/IE7 client authentication
5720 * Cleaned up the XYSSL* #defines, suggested by Azriel Fasten
5721 * Fixed net_recv(), thanks to Lorenz Schori and Egon Kocjan
5722 * Added user-defined callbacks for handling I/O and sessions
5723 * Added lots of debugging output in the SSL/TLS functions
5724 * Added preliminary X.509 cert. writing by Pascal Vizeli
5725 * Added preliminary support for the VIA PadLock routines
5726 * Added AES-CFB mode of operation, contributed by chmike
5727 * Added an SSL/TLS stress testing program (ssl_test.c)
5728 * Updated the RSA PKCS#1 code to allow choosing between
5729 RSA_PUBLIC and RSA_PRIVATE, as suggested by David Barrett
5730 * Updated ssl_read() to skip 0-length records from OpenSSL
5731 * Fixed the make install target to comply with *BSD make
5732 * Fixed a bug in mpi_read_binary() on 64-bit platforms
5733 * mpi_is_prime() speedups, thanks to Kevin McLaughlin
5734 * Fixed a long standing memory leak in mpi_is_prime()
5735 * Replaced realloc with malloc in mpi_grow(), and set
5736 the sign of zero as positive in mpi_init() (reported
5737 by Jonathan M. McCune)
5738
5739= Version 0.7 released on 2007-07-07
5740
5741 * Added support for the MicroBlaze soft-core processor
5742 * Fixed a bug in ssl_tls.c which sometimes prevented SSL
5743 connections from being established with non-blocking I/O
5744 * Fixed a couple bugs in the VS6 and UNIX Makefiles
5745 * Fixed the "PIC register ebx clobbered in asm" bug
5746 * Added HMAC starts/update/finish support functions
5747 * Added the SHA-224, SHA-384 and SHA-512 hash functions
5748 * Fixed the net_set_*block routines, thanks to Andreas
5749 * Added a few demonstration programs: md5sum, sha1sum,
5750 dh_client, dh_server, rsa_genkey, rsa_sign, rsa_verify
5751 * Added new bignum import and export helper functions
5752 * Rewrote README.txt in program/ssl/ca to better explain
5753 how to create a test PKI
5754
5755= Version 0.6 released on 2007-04-01
5756
5757 * Ciphers used in SSL/TLS can now be disabled at compile
5758 time, to reduce the memory footprint on embedded systems
5759 * Added multiply assembly code for the TriCore and modified
5760 havege_struct for this processor, thanks to David Patiño
5761 * Added multiply assembly code for 64-bit PowerPCs,
5762 thanks to Peking University and the OSU Open Source Lab
5763 * Added experimental support of Quantum Cryptography
5764 * Added support for autoconf, contributed by Arnaud Cornet
5765 * Fixed "long long" compilation issues on IA-64 and PPC64
5766 * Fixed a bug introduced in xyssl-0.5/timing.c: hardclock
5767 was not being correctly defined on ARM and MIPS
5768
5769= Version 0.5 released on 2007-03-01
5770
5771 * Added multiply assembly code for SPARC and Alpha
5772 * Added (beta) support for non-blocking I/O operations
5773 * Implemented session resuming and client authentication
5774 * Fixed some portability issues on WinCE, MINIX 3, Plan9
5775 (thanks to Benjamin Newman), HP-UX, FreeBSD and Solaris
5776 * Improved the performance of the EDH key exchange
5777 * Fixed a bug that caused valid packets with a payload
5778 size of 16384 bytes to be rejected
5779
5780= Version 0.4 released on 2007-02-01
5781
5782 * Added support for Ephemeral Diffie-Hellman key exchange
5783 * Added multiply asm code for SSE2, ARM, PPC, MIPS and M68K
5784 * Various improvement to the modular exponentiation code
5785 * Rewrote the headers to generate the API docs with doxygen
5786 * Fixed a bug in ssl_encrypt_buf (incorrect padding was
5787 generated) and in ssl_parse_client_hello (max. client
5788 version was not properly set), thanks to Didier Rebeix
5789 * Fixed another bug in ssl_parse_client_hello: clients with
5790 cipherlists larger than 96 bytes were incorrectly rejected
5791 * Fixed a couple memory leak in x509_read.c
5792
5793= Version 0.3 released on 2007-01-01
5794
5795 * Added server-side SSLv3 and TLSv1.0 support
5796 * Multiple fixes to enhance the compatibility with g++,
5797 thanks to Xosé Antón Otero Ferreira
5798 * Fixed a bug in the CBC code, thanks to dowst; also,
Paul Bakker60b1d102013-10-29 10:02:51 +01005799 the bignum code is no longer dependent on long long
Paul Bakker99ed6782011-01-05 14:48:42 +00005800 * Updated rsa_pkcs1_sign to handle arbitrary large inputs
5801 * Updated timing.c for improved compatibility with i386
5802 and 486 processors, thanks to Arnaud Cornet
5803
5804= Version 0.2 released on 2006-12-01
5805
5806 * Updated timing.c to support ARM and MIPS arch
5807 * Updated the MPI code to support 8086 on MSVC 1.5
5808 * Added the copyright notice at the top of havege.h
5809 * Fixed a bug in sha2_hmac, thanks to newsoft/Wenfang Zhang
5810 * Fixed a bug reported by Adrian Rüegsegger in x509_read_key
5811 * Fixed a bug reported by Torsten Lauter in ssl_read_record
5812 * Fixed a bug in rsa_check_privkey that would wrongly cause
5813 valid RSA keys to be dismissed (thanks to oldwolf)
5814 * Fixed a bug in mpi_is_prime that caused some primes to fail
5815 the Miller-Rabin primality test
5816
5817 I'd also like to thank Younès Hafri for the CRUX linux port,
5818 Khalil Petit who added XySSL into pkgsrc and Arnaud Cornet
5819 who maintains the Debian package :-)
5820
5821= Version 0.1 released on 2006-11-01