ssl_tls.c: Move some client specific functions to ssl_client.c
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/ssl_client.c b/library/ssl_client.c
index 9a65b57..fa5b9f9 100644
--- a/library/ssl_client.c
+++ b/library/ssl_client.c
@@ -46,6 +46,76 @@
#include "ssl_tls13_keys.h"
#include "ssl_debug_helpers.h"
+#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
+static int ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ const unsigned char *end,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+ size_t hostname_len;
+
+ *olen = 0;
+
+ if( ssl->hostname == NULL )
+ return( 0 );
+
+ MBEDTLS_SSL_DEBUG_MSG( 3,
+ ( "client hello, adding server name extension: %s",
+ ssl->hostname ) );
+
+ hostname_len = strlen( ssl->hostname );
+
+ MBEDTLS_SSL_CHK_BUF_PTR( p, end, hostname_len + 9 );
+
+ /*
+ * Sect. 3, RFC 6066 (TLS Extensions Definitions)
+ *
+ * In order to provide any of the server names, clients MAY include an
+ * extension of type "server_name" in the (extended) client hello. The
+ * "extension_data" field of this extension SHALL contain
+ * "ServerNameList" where:
+ *
+ * struct {
+ * NameType name_type;
+ * select (name_type) {
+ * case host_name: HostName;
+ * } name;
+ * } ServerName;
+ *
+ * enum {
+ * host_name(0), (255)
+ * } NameType;
+ *
+ * opaque HostName<1..2^16-1>;
+ *
+ * struct {
+ * ServerName server_name_list<1..2^16-1>
+ * } ServerNameList;
+ *
+ */
+ MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SERVERNAME, p, 0 );
+ p += 2;
+
+ MBEDTLS_PUT_UINT16_BE( hostname_len + 5, p, 0 );
+ p += 2;
+
+ MBEDTLS_PUT_UINT16_BE( hostname_len + 3, p, 0 );
+ p += 2;
+
+ *p++ = MBEDTLS_BYTE_0( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME );
+
+ MBEDTLS_PUT_UINT16_BE( hostname_len, p, 0 );
+ p += 2;
+
+ memcpy( p, ssl->hostname, hostname_len );
+
+ *olen = hostname_len + 9;
+
+ return( 0 );
+}
+#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
+
#if defined(MBEDTLS_SSL_ALPN)
/*
* ssl_write_alpn_ext()
@@ -116,6 +186,233 @@
}
#endif /* MBEDTLS_SSL_ALPN */
+#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+/*
+ * Function for writing a supported groups (TLS 1.3) or supported elliptic
+ * curves (TLS 1.2) extension.
+ *
+ * The "extension_data" field of a supported groups extension contains a
+ * "NamedGroupList" value (TLS 1.3 RFC8446):
+ * enum {
+ * secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019),
+ * x25519(0x001D), x448(0x001E),
+ * ffdhe2048(0x0100), ffdhe3072(0x0101), ffdhe4096(0x0102),
+ * ffdhe6144(0x0103), ffdhe8192(0x0104),
+ * ffdhe_private_use(0x01FC..0x01FF),
+ * ecdhe_private_use(0xFE00..0xFEFF),
+ * (0xFFFF)
+ * } NamedGroup;
+ * struct {
+ * NamedGroup named_group_list<2..2^16-1>;
+ * } NamedGroupList;
+ *
+ * The "extension_data" field of a supported elliptic curves extension contains
+ * a "NamedCurveList" value (TLS 1.2 RFC 8422):
+ * enum {
+ * deprecated(1..22),
+ * secp256r1 (23), secp384r1 (24), secp521r1 (25),
+ * x25519(29), x448(30),
+ * reserved (0xFE00..0xFEFF),
+ * deprecated(0xFF01..0xFF02),
+ * (0xFFFF)
+ * } NamedCurve;
+ * struct {
+ * NamedCurve named_curve_list<2..2^16-1>
+ * } NamedCurveList;
+ *
+ * The TLS 1.3 supported groups extension was defined to be a compatible
+ * generalization of the TLS 1.2 supported elliptic curves extension. They both
+ * share the same extension identifier.
+ *
+ * DHE groups are not supported yet.
+ */
+static int ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ const unsigned char *end,
+ size_t *out_len )
+{
+ unsigned char *p = buf ;
+ unsigned char *named_group_list; /* Start of named_group_list */
+ size_t named_group_list_len; /* Length of named_group_list */
+ const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
+
+ *out_len = 0;
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_groups extension" ) );
+
+ /* Check if we have space for header and length fields:
+ * - extension_type (2 bytes)
+ * - extension_data_length (2 bytes)
+ * - named_group_list_length (2 bytes)
+ */
+ MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
+ p += 6;
+
+ named_group_list = p;
+
+ if( group_list == NULL )
+ return( MBEDTLS_ERR_SSL_BAD_CONFIG );
+
+ for( ; *group_list != 0; group_list++ )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "got supported group(%04x)", *group_list ) );
+
+#if defined(MBEDTLS_ECP_C)
+ if( ( mbedtls_ssl_conf_is_tls13_enabled( ssl->conf ) &&
+ mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) ) ||
+ ( mbedtls_ssl_conf_is_tls12_enabled( ssl->conf ) &&
+ mbedtls_ssl_tls12_named_group_is_ecdhe( *group_list ) ) )
+ {
+ const mbedtls_ecp_curve_info *curve_info;
+ curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
+ if( curve_info == NULL )
+ continue;
+ MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
+ MBEDTLS_PUT_UINT16_BE( *group_list, p, 0 );
+ p += 2;
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "NamedGroup: %s ( %x )",
+ curve_info->name, *group_list ) );
+ }
+#endif /* MBEDTLS_ECP_C */
+ /* Add DHE groups here */
+
+ }
+
+ /* Length of named_group_list */
+ named_group_list_len = p - named_group_list;
+ if( named_group_list_len == 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "No group available." ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+
+ /* Write extension_type */
+ MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_GROUPS, buf, 0 );
+ /* Write extension_data_length */
+ MBEDTLS_PUT_UINT16_BE( named_group_list_len + 2, buf, 2 );
+ /* Write length of named_group_list */
+ MBEDTLS_PUT_UINT16_BE( named_group_list_len, buf, 4 );
+
+ MBEDTLS_SSL_DEBUG_BUF( 3, "Supported groups extension",
+ buf + 4, named_group_list_len + 2 );
+
+ *out_len = p - buf;
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+ ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SUPPORTED_GROUPS;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
+
+ return( 0 );
+}
+
+#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
+ MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
+/*
+ * Function for writing a signature algorithm extension.
+ *
+ * The `extension_data` field of signature algorithm contains a `SignatureSchemeList`
+ * value (TLS 1.3 RFC8446):
+ * enum {
+ * ....
+ * ecdsa_secp256r1_sha256( 0x0403 ),
+ * ecdsa_secp384r1_sha384( 0x0503 ),
+ * ecdsa_secp521r1_sha512( 0x0603 ),
+ * ....
+ * } SignatureScheme;
+ *
+ * struct {
+ * SignatureScheme supported_signature_algorithms<2..2^16-2>;
+ * } SignatureSchemeList;
+ *
+ * The `extension_data` field of signature algorithm contains a `SignatureAndHashAlgorithm`
+ * value (TLS 1.2 RFC5246):
+ * enum {
+ * none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
+ * sha512(6), (255)
+ * } HashAlgorithm;
+ *
+ * enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
+ * SignatureAlgorithm;
+ *
+ * struct {
+ * HashAlgorithm hash;
+ * SignatureAlgorithm signature;
+ * } SignatureAndHashAlgorithm;
+ *
+ * SignatureAndHashAlgorithm
+ * supported_signature_algorithms<2..2^16-2>;
+ *
+ * The TLS 1.3 signature algorithm extension was defined to be a compatible
+ * generalization of the TLS 1.2 signature algorithm extension.
+ * `SignatureAndHashAlgorithm` field of TLS 1.2 can be represented by
+ * `SignatureScheme` field of TLS 1.3
+ *
+ */
+static int ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
+ const unsigned char *end, size_t *out_len )
+{
+ unsigned char *p = buf;
+ unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
+ size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
+
+ *out_len = 0;
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
+
+ /* Check if we have space for header and length field:
+ * - extension_type (2 bytes)
+ * - extension_data_length (2 bytes)
+ * - supported_signature_algorithms_length (2 bytes)
+ */
+ MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
+ p += 6;
+
+ /*
+ * Write supported_signature_algorithms
+ */
+ supported_sig_alg = p;
+ const uint16_t *sig_alg = mbedtls_ssl_get_sig_algs( ssl );
+ if( sig_alg == NULL )
+ return( MBEDTLS_ERR_SSL_BAD_CONFIG );
+
+ for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
+ {
+ if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
+ continue;
+ MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
+ MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
+ p += 2;
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
+ }
+
+ /* Length of supported_signature_algorithms */
+ supported_sig_alg_len = p - supported_sig_alg;
+ if( supported_sig_alg_len == 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+
+ /* Write extension_type */
+ MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
+ /* Write extension_data_length */
+ MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
+ /* Write length of supported_signature_algorithms */
+ MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
+
+ /* Output the total length of signature algorithms extension. */
+ *out_len = p - buf;
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+ ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
+ return( 0 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
+
/* Write cipher_suites
* CipherSuite cipher_suites<2..2^16-2>;
*/
@@ -431,7 +728,7 @@
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
/* Write server name extension */
- ret = mbedtls_ssl_write_hostname_ext( ssl, p, end, &output_len );
+ ret = ssl_write_hostname_ext( ssl, p, end, &output_len );
if( ret != 0 )
return( ret );
p += output_len;
@@ -467,7 +764,7 @@
#endif
0 )
{
- ret = mbedtls_ssl_write_supported_groups_ext( ssl, p, end, &output_len );
+ ret = ssl_write_supported_groups_ext( ssl, p, end, &output_len );
if( ret != 0 )
return( ret );
p += output_len;
@@ -484,7 +781,7 @@
#endif
0 )
{
- ret = mbedtls_ssl_write_sig_alg_ext( ssl, p, end, &output_len );
+ ret = ssl_write_sig_alg_ext( ssl, p, end, &output_len );
if( ret != 0 )
return( ret );
p += output_len;
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index bc2581f..f147d77 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -1164,13 +1164,6 @@
void mbedtls_ssl_set_outbound_transform( mbedtls_ssl_context *ssl,
mbedtls_ssl_transform *transform );
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-int mbedtls_ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- const unsigned char *end,
- size_t *olen );
-#endif
-
int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl );
int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl );
void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );
@@ -1834,12 +1827,6 @@
#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
/*
- * Write Signature Algorithm extension
- */
-int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
- const unsigned char *end, size_t *out_len );
-
-/*
* Parse TLS 1.3 Signature Algorithm extension
*/
int mbedtls_ssl_tls13_parse_sig_alg_ext( mbedtls_ssl_context *ssl,
@@ -1916,15 +1903,6 @@
named_group <= MBEDTLS_SSL_IANA_TLS_GROUP_FFDHE8192 );
}
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-int mbedtls_ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- const unsigned char *end,
- size_t *out_len );
-
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
/*
* Return supported signature algorithms.
*
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 4eb5a9c..15784e6 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -4685,305 +4685,6 @@
#endif /* !MBEDTLS_USE_PSA_CRYPTO */
-#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) || \
- defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-/*
- * Function for writing a supported groups (TLS 1.3) or supported elliptic
- * curves (TLS 1.2) extension.
- *
- * The "extension_data" field of a supported groups extension contains a
- * "NamedGroupList" value (TLS 1.3 RFC8446):
- * enum {
- * secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019),
- * x25519(0x001D), x448(0x001E),
- * ffdhe2048(0x0100), ffdhe3072(0x0101), ffdhe4096(0x0102),
- * ffdhe6144(0x0103), ffdhe8192(0x0104),
- * ffdhe_private_use(0x01FC..0x01FF),
- * ecdhe_private_use(0xFE00..0xFEFF),
- * (0xFFFF)
- * } NamedGroup;
- * struct {
- * NamedGroup named_group_list<2..2^16-1>;
- * } NamedGroupList;
- *
- * The "extension_data" field of a supported elliptic curves extension contains
- * a "NamedCurveList" value (TLS 1.2 RFC 8422):
- * enum {
- * deprecated(1..22),
- * secp256r1 (23), secp384r1 (24), secp521r1 (25),
- * x25519(29), x448(30),
- * reserved (0xFE00..0xFEFF),
- * deprecated(0xFF01..0xFF02),
- * (0xFFFF)
- * } NamedCurve;
- * struct {
- * NamedCurve named_curve_list<2..2^16-1>
- * } NamedCurveList;
- *
- * The TLS 1.3 supported groups extension was defined to be a compatible
- * generalization of the TLS 1.2 supported elliptic curves extension. They both
- * share the same extension identifier.
- *
- * DHE groups are not supported yet.
- */
-int mbedtls_ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- const unsigned char *end,
- size_t *out_len )
-{
- unsigned char *p = buf ;
- unsigned char *named_group_list; /* Start of named_group_list */
- size_t named_group_list_len; /* Length of named_group_list */
- const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
-
- *out_len = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_groups extension" ) );
-
- /* Check if we have space for header and length fields:
- * - extension_type (2 bytes)
- * - extension_data_length (2 bytes)
- * - named_group_list_length (2 bytes)
- */
- MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
- p += 6;
-
- named_group_list = p;
-
- if( group_list == NULL )
- return( MBEDTLS_ERR_SSL_BAD_CONFIG );
-
- for( ; *group_list != 0; group_list++ )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got supported group(%04x)", *group_list ) );
-
-#if defined(MBEDTLS_ECP_C)
- if( ( mbedtls_ssl_conf_is_tls13_enabled( ssl->conf ) &&
- mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) ) ||
- ( mbedtls_ssl_conf_is_tls12_enabled( ssl->conf ) &&
- mbedtls_ssl_tls12_named_group_is_ecdhe( *group_list ) ) )
- {
- const mbedtls_ecp_curve_info *curve_info;
- curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
- if( curve_info == NULL )
- continue;
- MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
- MBEDTLS_PUT_UINT16_BE( *group_list, p, 0 );
- p += 2;
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "NamedGroup: %s ( %x )",
- curve_info->name, *group_list ) );
- }
-#endif /* MBEDTLS_ECP_C */
- /* Add DHE groups here */
-
- }
-
- /* Length of named_group_list */
- named_group_list_len = p - named_group_list;
- if( named_group_list_len == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "No group available." ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- /* Write extension_type */
- MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_GROUPS, buf, 0 );
- /* Write extension_data_length */
- MBEDTLS_PUT_UINT16_BE( named_group_list_len + 2, buf, 2 );
- /* Write length of named_group_list */
- MBEDTLS_PUT_UINT16_BE( named_group_list_len, buf, 4 );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "Supported groups extension",
- buf + 4, named_group_list_len + 2 );
-
- *out_len = p - buf;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
- ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SUPPORTED_GROUPS;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
-
- return( 0 );
-}
-
-#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED ||
- MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
-/*
- * Function for writing a signature algorithm extension.
- *
- * The `extension_data` field of signature algorithm contains a `SignatureSchemeList`
- * value (TLS 1.3 RFC8446):
- * enum {
- * ....
- * ecdsa_secp256r1_sha256( 0x0403 ),
- * ecdsa_secp384r1_sha384( 0x0503 ),
- * ecdsa_secp521r1_sha512( 0x0603 ),
- * ....
- * } SignatureScheme;
- *
- * struct {
- * SignatureScheme supported_signature_algorithms<2..2^16-2>;
- * } SignatureSchemeList;
- *
- * The `extension_data` field of signature algorithm contains a `SignatureAndHashAlgorithm`
- * value (TLS 1.2 RFC5246):
- * enum {
- * none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
- * sha512(6), (255)
- * } HashAlgorithm;
- *
- * enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
- * SignatureAlgorithm;
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * SignatureAndHashAlgorithm
- * supported_signature_algorithms<2..2^16-2>;
- *
- * The TLS 1.3 signature algorithm extension was defined to be a compatible
- * generalization of the TLS 1.2 signature algorithm extension.
- * `SignatureAndHashAlgorithm` field of TLS 1.2 can be represented by
- * `SignatureScheme` field of TLS 1.3
- *
- */
-int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
- const unsigned char *end, size_t *out_len )
-{
- unsigned char *p = buf;
- unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
- size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
-
- *out_len = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
-
- /* Check if we have space for header and length field:
- * - extension_type (2 bytes)
- * - extension_data_length (2 bytes)
- * - supported_signature_algorithms_length (2 bytes)
- */
- MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
- p += 6;
-
- /*
- * Write supported_signature_algorithms
- */
- supported_sig_alg = p;
- const uint16_t *sig_alg = mbedtls_ssl_get_sig_algs( ssl );
- if( sig_alg == NULL )
- return( MBEDTLS_ERR_SSL_BAD_CONFIG );
-
- for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
- {
- if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
- continue;
- MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
- MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
- p += 2;
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
- }
-
- /* Length of supported_signature_algorithms */
- supported_sig_alg_len = p - supported_sig_alg;
- if( supported_sig_alg_len == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- /* Write extension_type */
- MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
- /* Write extension_data_length */
- MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
- /* Write length of supported_signature_algorithms */
- MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
-
- /* Output the total length of signature algorithms extension. */
- *out_len = p - buf;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
- ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-int mbedtls_ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- const unsigned char *end,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t hostname_len;
-
- *olen = 0;
-
- if( ssl->hostname == NULL )
- return( 0 );
-
- MBEDTLS_SSL_DEBUG_MSG( 3,
- ( "client hello, adding server name extension: %s",
- ssl->hostname ) );
-
- hostname_len = strlen( ssl->hostname );
-
- MBEDTLS_SSL_CHK_BUF_PTR( p, end, hostname_len + 9 );
-
- /*
- * Sect. 3, RFC 6066 (TLS Extensions Definitions)
- *
- * In order to provide any of the server names, clients MAY include an
- * extension of type "server_name" in the (extended) client hello. The
- * "extension_data" field of this extension SHALL contain
- * "ServerNameList" where:
- *
- * struct {
- * NameType name_type;
- * select (name_type) {
- * case host_name: HostName;
- * } name;
- * } ServerName;
- *
- * enum {
- * host_name(0), (255)
- * } NameType;
- *
- * opaque HostName<1..2^16-1>;
- *
- * struct {
- * ServerName server_name_list<1..2^16-1>
- * } ServerNameList;
- *
- */
- MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SERVERNAME, p, 0 );
- p += 2;
-
- MBEDTLS_PUT_UINT16_BE( hostname_len + 5, p, 0 );
- p += 2;
-
- MBEDTLS_PUT_UINT16_BE( hostname_len + 3, p, 0 );
- p += 2;
-
- *p++ = MBEDTLS_BYTE_0( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME );
-
- MBEDTLS_PUT_UINT16_BE( hostname_len, p, 0 );
- p += 2;
-
- memcpy( p, ssl->hostname, hostname_len );
-
- *olen = hostname_len + 9;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_USE_PSA_CRYPTO)