Release Mbed Crypto 0.1.0a
diff --git a/library/pk_wrap.c b/library/pk_wrap.c
new file mode 100644
index 0000000..987244c
--- /dev/null
+++ b/library/pk_wrap.c
@@ -0,0 +1,523 @@
+/*
+ * Public Key abstraction layer: wrapper functions
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of Mbed Crypto (https://tls.mbed.org)
+ */
+
+#if !defined(MBEDCRYPTO_CONFIG_FILE)
+#include "mbedcrypto/config.h"
+#else
+#include MBEDCRYPTO_CONFIG_FILE
+#endif
+
+#if defined(MBEDCRYPTO_PK_C)
+#include "mbedcrypto/pk_internal.h"
+
+/* Even if RSA not activated, for the sake of RSA-alt */
+#include "mbedcrypto/rsa.h"
+
+#include <string.h>
+
+#if defined(MBEDCRYPTO_ECP_C)
+#include "mbedcrypto/ecp.h"
+#endif
+
+#if defined(MBEDCRYPTO_ECDSA_C)
+#include "mbedcrypto/ecdsa.h"
+#endif
+
+#if defined(MBEDCRYPTO_PK_RSA_ALT_SUPPORT)
+#include "mbedcrypto/platform_util.h"
+#endif
+
+#if defined(MBEDCRYPTO_PLATFORM_C)
+#include "mbedcrypto/platform.h"
+#else
+#include <stdlib.h>
+#define mbedcrypto_calloc calloc
+#define mbedcrypto_free free
+#endif
+
+#include <limits.h>
+#include <stdint.h>
+
+#if defined(MBEDCRYPTO_RSA_C)
+static int rsa_can_do( mbedcrypto_pk_type_t type )
+{
+ return( type == MBEDCRYPTO_PK_RSA ||
+ type == MBEDCRYPTO_PK_RSASSA_PSS );
+}
+
+static size_t rsa_get_bitlen( const void *ctx )
+{
+ const mbedcrypto_rsa_context * rsa = (const mbedcrypto_rsa_context *) ctx;
+ return( mbedcrypto_rsa_get_bitlen( rsa ) );
+}
+
+static int rsa_verify_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len )
+{
+ int ret;
+ mbedcrypto_rsa_context * rsa = (mbedcrypto_rsa_context *) ctx;
+ size_t rsa_len = mbedcrypto_rsa_get_len( rsa );
+
+#if SIZE_MAX > UINT_MAX
+ if( md_alg == MBEDCRYPTO_MD_NONE && UINT_MAX < hash_len )
+ return( MBEDCRYPTO_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
+ if( sig_len < rsa_len )
+ return( MBEDCRYPTO_ERR_RSA_VERIFY_FAILED );
+
+ if( ( ret = mbedcrypto_rsa_pkcs1_verify( rsa, NULL, NULL,
+ MBEDCRYPTO_RSA_PUBLIC, md_alg,
+ (unsigned int) hash_len, hash, sig ) ) != 0 )
+ return( ret );
+
+ /* The buffer contains a valid signature followed by extra data.
+ * We have a special error code for that so that so that callers can
+ * use mbedcrypto_pk_verify() to check "Does the buffer start with a
+ * valid signature?" and not just "Does the buffer contain a valid
+ * signature?". */
+ if( sig_len > rsa_len )
+ return( MBEDCRYPTO_ERR_PK_SIG_LEN_MISMATCH );
+
+ return( 0 );
+}
+
+static int rsa_sign_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ mbedcrypto_rsa_context * rsa = (mbedcrypto_rsa_context *) ctx;
+
+#if SIZE_MAX > UINT_MAX
+ if( md_alg == MBEDCRYPTO_MD_NONE && UINT_MAX < hash_len )
+ return( MBEDCRYPTO_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
+ *sig_len = mbedcrypto_rsa_get_len( rsa );
+
+ return( mbedcrypto_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDCRYPTO_RSA_PRIVATE,
+ md_alg, (unsigned int) hash_len, hash, sig ) );
+}
+
+static int rsa_decrypt_wrap( void *ctx,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output, size_t *olen, size_t osize,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ mbedcrypto_rsa_context * rsa = (mbedcrypto_rsa_context *) ctx;
+
+ if( ilen != mbedcrypto_rsa_get_len( rsa ) )
+ return( MBEDCRYPTO_ERR_RSA_BAD_INPUT_DATA );
+
+ return( mbedcrypto_rsa_pkcs1_decrypt( rsa, f_rng, p_rng,
+ MBEDCRYPTO_RSA_PRIVATE, olen, input, output, osize ) );
+}
+
+static int rsa_encrypt_wrap( void *ctx,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output, size_t *olen, size_t osize,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ mbedcrypto_rsa_context * rsa = (mbedcrypto_rsa_context *) ctx;
+ *olen = mbedcrypto_rsa_get_len( rsa );
+
+ if( *olen > osize )
+ return( MBEDCRYPTO_ERR_RSA_OUTPUT_TOO_LARGE );
+
+ return( mbedcrypto_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDCRYPTO_RSA_PUBLIC,
+ ilen, input, output ) );
+}
+
+static int rsa_check_pair_wrap( const void *pub, const void *prv )
+{
+ return( mbedcrypto_rsa_check_pub_priv( (const mbedcrypto_rsa_context *) pub,
+ (const mbedcrypto_rsa_context *) prv ) );
+}
+
+static void *rsa_alloc_wrap( void )
+{
+ void *ctx = mbedcrypto_calloc( 1, sizeof( mbedcrypto_rsa_context ) );
+
+ if( ctx != NULL )
+ mbedcrypto_rsa_init( (mbedcrypto_rsa_context *) ctx, 0, 0 );
+
+ return( ctx );
+}
+
+static void rsa_free_wrap( void *ctx )
+{
+ mbedcrypto_rsa_free( (mbedcrypto_rsa_context *) ctx );
+ mbedcrypto_free( ctx );
+}
+
+static void rsa_debug( const void *ctx, mbedcrypto_pk_debug_item *items )
+{
+ items->type = MBEDCRYPTO_PK_DEBUG_MPI;
+ items->name = "rsa.N";
+ items->value = &( ((mbedcrypto_rsa_context *) ctx)->N );
+
+ items++;
+
+ items->type = MBEDCRYPTO_PK_DEBUG_MPI;
+ items->name = "rsa.E";
+ items->value = &( ((mbedcrypto_rsa_context *) ctx)->E );
+}
+
+const mbedcrypto_pk_info_t mbedcrypto_rsa_info = {
+ MBEDCRYPTO_PK_RSA,
+ "RSA",
+ rsa_get_bitlen,
+ rsa_can_do,
+ rsa_verify_wrap,
+ rsa_sign_wrap,
+ rsa_decrypt_wrap,
+ rsa_encrypt_wrap,
+ rsa_check_pair_wrap,
+ rsa_alloc_wrap,
+ rsa_free_wrap,
+ rsa_debug,
+};
+#endif /* MBEDCRYPTO_RSA_C */
+
+#if defined(MBEDCRYPTO_ECP_C)
+/*
+ * Generic EC key
+ */
+static int eckey_can_do( mbedcrypto_pk_type_t type )
+{
+ return( type == MBEDCRYPTO_PK_ECKEY ||
+ type == MBEDCRYPTO_PK_ECKEY_DH ||
+ type == MBEDCRYPTO_PK_ECDSA );
+}
+
+static size_t eckey_get_bitlen( const void *ctx )
+{
+ return( ((mbedcrypto_ecp_keypair *) ctx)->grp.pbits );
+}
+
+#if defined(MBEDCRYPTO_ECDSA_C)
+/* Forward declarations */
+static int ecdsa_verify_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len );
+
+static int ecdsa_sign_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
+
+static int eckey_verify_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len )
+{
+ int ret;
+ mbedcrypto_ecdsa_context ecdsa;
+
+ mbedcrypto_ecdsa_init( &ecdsa );
+
+ if( ( ret = mbedcrypto_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
+ ret = ecdsa_verify_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len );
+
+ mbedcrypto_ecdsa_free( &ecdsa );
+
+ return( ret );
+}
+
+static int eckey_sign_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ int ret;
+ mbedcrypto_ecdsa_context ecdsa;
+
+ mbedcrypto_ecdsa_init( &ecdsa );
+
+ if( ( ret = mbedcrypto_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
+ ret = ecdsa_sign_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len,
+ f_rng, p_rng );
+
+ mbedcrypto_ecdsa_free( &ecdsa );
+
+ return( ret );
+}
+
+#endif /* MBEDCRYPTO_ECDSA_C */
+
+static int eckey_check_pair( const void *pub, const void *prv )
+{
+ return( mbedcrypto_ecp_check_pub_priv( (const mbedcrypto_ecp_keypair *) pub,
+ (const mbedcrypto_ecp_keypair *) prv ) );
+}
+
+static void *eckey_alloc_wrap( void )
+{
+ void *ctx = mbedcrypto_calloc( 1, sizeof( mbedcrypto_ecp_keypair ) );
+
+ if( ctx != NULL )
+ mbedcrypto_ecp_keypair_init( ctx );
+
+ return( ctx );
+}
+
+static void eckey_free_wrap( void *ctx )
+{
+ mbedcrypto_ecp_keypair_free( (mbedcrypto_ecp_keypair *) ctx );
+ mbedcrypto_free( ctx );
+}
+
+static void eckey_debug( const void *ctx, mbedcrypto_pk_debug_item *items )
+{
+ items->type = MBEDCRYPTO_PK_DEBUG_ECP;
+ items->name = "eckey.Q";
+ items->value = &( ((mbedcrypto_ecp_keypair *) ctx)->Q );
+}
+
+const mbedcrypto_pk_info_t mbedcrypto_eckey_info = {
+ MBEDCRYPTO_PK_ECKEY,
+ "EC",
+ eckey_get_bitlen,
+ eckey_can_do,
+#if defined(MBEDCRYPTO_ECDSA_C)
+ eckey_verify_wrap,
+ eckey_sign_wrap,
+#else
+ NULL,
+ NULL,
+#endif
+ NULL,
+ NULL,
+ eckey_check_pair,
+ eckey_alloc_wrap,
+ eckey_free_wrap,
+ eckey_debug,
+};
+
+/*
+ * EC key restricted to ECDH
+ */
+static int eckeydh_can_do( mbedcrypto_pk_type_t type )
+{
+ return( type == MBEDCRYPTO_PK_ECKEY ||
+ type == MBEDCRYPTO_PK_ECKEY_DH );
+}
+
+const mbedcrypto_pk_info_t mbedcrypto_eckeydh_info = {
+ MBEDCRYPTO_PK_ECKEY_DH,
+ "EC_DH",
+ eckey_get_bitlen, /* Same underlying key structure */
+ eckeydh_can_do,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ eckey_check_pair,
+ eckey_alloc_wrap, /* Same underlying key structure */
+ eckey_free_wrap, /* Same underlying key structure */
+ eckey_debug, /* Same underlying key structure */
+};
+#endif /* MBEDCRYPTO_ECP_C */
+
+#if defined(MBEDCRYPTO_ECDSA_C)
+static int ecdsa_can_do( mbedcrypto_pk_type_t type )
+{
+ return( type == MBEDCRYPTO_PK_ECDSA );
+}
+
+static int ecdsa_verify_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len )
+{
+ int ret;
+ ((void) md_alg);
+
+ ret = mbedcrypto_ecdsa_read_signature( (mbedcrypto_ecdsa_context *) ctx,
+ hash, hash_len, sig, sig_len );
+
+ if( ret == MBEDCRYPTO_ERR_ECP_SIG_LEN_MISMATCH )
+ return( MBEDCRYPTO_ERR_PK_SIG_LEN_MISMATCH );
+
+ return( ret );
+}
+
+static int ecdsa_sign_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ return( mbedcrypto_ecdsa_write_signature( (mbedcrypto_ecdsa_context *) ctx,
+ md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
+}
+
+static void *ecdsa_alloc_wrap( void )
+{
+ void *ctx = mbedcrypto_calloc( 1, sizeof( mbedcrypto_ecdsa_context ) );
+
+ if( ctx != NULL )
+ mbedcrypto_ecdsa_init( (mbedcrypto_ecdsa_context *) ctx );
+
+ return( ctx );
+}
+
+static void ecdsa_free_wrap( void *ctx )
+{
+ mbedcrypto_ecdsa_free( (mbedcrypto_ecdsa_context *) ctx );
+ mbedcrypto_free( ctx );
+}
+
+const mbedcrypto_pk_info_t mbedcrypto_ecdsa_info = {
+ MBEDCRYPTO_PK_ECDSA,
+ "ECDSA",
+ eckey_get_bitlen, /* Compatible key structures */
+ ecdsa_can_do,
+ ecdsa_verify_wrap,
+ ecdsa_sign_wrap,
+ NULL,
+ NULL,
+ eckey_check_pair, /* Compatible key structures */
+ ecdsa_alloc_wrap,
+ ecdsa_free_wrap,
+ eckey_debug, /* Compatible key structures */
+};
+#endif /* MBEDCRYPTO_ECDSA_C */
+
+#if defined(MBEDCRYPTO_PK_RSA_ALT_SUPPORT)
+/*
+ * Support for alternative RSA-private implementations
+ */
+
+static int rsa_alt_can_do( mbedcrypto_pk_type_t type )
+{
+ return( type == MBEDCRYPTO_PK_RSA );
+}
+
+static size_t rsa_alt_get_bitlen( const void *ctx )
+{
+ const mbedcrypto_rsa_alt_context *rsa_alt = (const mbedcrypto_rsa_alt_context *) ctx;
+
+ return( 8 * rsa_alt->key_len_func( rsa_alt->key ) );
+}
+
+static int rsa_alt_sign_wrap( void *ctx, mbedcrypto_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ mbedcrypto_rsa_alt_context *rsa_alt = (mbedcrypto_rsa_alt_context *) ctx;
+
+#if SIZE_MAX > UINT_MAX
+ if( UINT_MAX < hash_len )
+ return( MBEDCRYPTO_ERR_PK_BAD_INPUT_DATA );
+#endif /* SIZE_MAX > UINT_MAX */
+
+ *sig_len = rsa_alt->key_len_func( rsa_alt->key );
+
+ return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDCRYPTO_RSA_PRIVATE,
+ md_alg, (unsigned int) hash_len, hash, sig ) );
+}
+
+static int rsa_alt_decrypt_wrap( void *ctx,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output, size_t *olen, size_t osize,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
+{
+ mbedcrypto_rsa_alt_context *rsa_alt = (mbedcrypto_rsa_alt_context *) ctx;
+
+ ((void) f_rng);
+ ((void) p_rng);
+
+ if( ilen != rsa_alt->key_len_func( rsa_alt->key ) )
+ return( MBEDCRYPTO_ERR_RSA_BAD_INPUT_DATA );
+
+ return( rsa_alt->decrypt_func( rsa_alt->key,
+ MBEDCRYPTO_RSA_PRIVATE, olen, input, output, osize ) );
+}
+
+#if defined(MBEDCRYPTO_RSA_C)
+static int rsa_alt_check_pair( const void *pub, const void *prv )
+{
+ unsigned char sig[MBEDCRYPTO_MPI_MAX_SIZE];
+ unsigned char hash[32];
+ size_t sig_len = 0;
+ int ret;
+
+ if( rsa_alt_get_bitlen( prv ) != rsa_get_bitlen( pub ) )
+ return( MBEDCRYPTO_ERR_RSA_KEY_CHECK_FAILED );
+
+ memset( hash, 0x2a, sizeof( hash ) );
+
+ if( ( ret = rsa_alt_sign_wrap( (void *) prv, MBEDCRYPTO_MD_NONE,
+ hash, sizeof( hash ),
+ sig, &sig_len, NULL, NULL ) ) != 0 )
+ {
+ return( ret );
+ }
+
+ if( rsa_verify_wrap( (void *) pub, MBEDCRYPTO_MD_NONE,
+ hash, sizeof( hash ), sig, sig_len ) != 0 )
+ {
+ return( MBEDCRYPTO_ERR_RSA_KEY_CHECK_FAILED );
+ }
+
+ return( 0 );
+}
+#endif /* MBEDCRYPTO_RSA_C */
+
+static void *rsa_alt_alloc_wrap( void )
+{
+ void *ctx = mbedcrypto_calloc( 1, sizeof( mbedcrypto_rsa_alt_context ) );
+
+ if( ctx != NULL )
+ memset( ctx, 0, sizeof( mbedcrypto_rsa_alt_context ) );
+
+ return( ctx );
+}
+
+static void rsa_alt_free_wrap( void *ctx )
+{
+ mbedcrypto_platform_zeroize( ctx, sizeof( mbedcrypto_rsa_alt_context ) );
+ mbedcrypto_free( ctx );
+}
+
+const mbedcrypto_pk_info_t mbedcrypto_rsa_alt_info = {
+ MBEDCRYPTO_PK_RSA_ALT,
+ "RSA-alt",
+ rsa_alt_get_bitlen,
+ rsa_alt_can_do,
+ NULL,
+ rsa_alt_sign_wrap,
+ rsa_alt_decrypt_wrap,
+ NULL,
+#if defined(MBEDCRYPTO_RSA_C)
+ rsa_alt_check_pair,
+#else
+ NULL,
+#endif
+ rsa_alt_alloc_wrap,
+ rsa_alt_free_wrap,
+ NULL,
+};
+
+#endif /* MBEDCRYPTO_PK_RSA_ALT_SUPPORT */
+
+#endif /* MBEDCRYPTO_PK_C */