ssl_tls.c: Move some client specific functions to ssl_client.c
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron
parent
7320e6436b
commit
fbd9f99f10
3 changed files with 300 additions and 324 deletions
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@ -46,6 +46,76 @@
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#include "ssl_tls13_keys.h"
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#include "ssl_debug_helpers.h"
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#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
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static int ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
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unsigned char *buf,
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const unsigned char *end,
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size_t *olen )
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{
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unsigned char *p = buf;
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size_t hostname_len;
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*olen = 0;
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if( ssl->hostname == NULL )
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return( 0 );
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MBEDTLS_SSL_DEBUG_MSG( 3,
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( "client hello, adding server name extension: %s",
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ssl->hostname ) );
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hostname_len = strlen( ssl->hostname );
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, hostname_len + 9 );
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/*
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* Sect. 3, RFC 6066 (TLS Extensions Definitions)
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*
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* In order to provide any of the server names, clients MAY include an
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* extension of type "server_name" in the (extended) client hello. The
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* "extension_data" field of this extension SHALL contain
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* "ServerNameList" where:
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*
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* struct {
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* NameType name_type;
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* select (name_type) {
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* case host_name: HostName;
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* } name;
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* } ServerName;
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*
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* enum {
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* host_name(0), (255)
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* } NameType;
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*
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* opaque HostName<1..2^16-1>;
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*
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* struct {
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* ServerName server_name_list<1..2^16-1>
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* } ServerNameList;
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*
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*/
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MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SERVERNAME, p, 0 );
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p += 2;
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MBEDTLS_PUT_UINT16_BE( hostname_len + 5, p, 0 );
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p += 2;
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MBEDTLS_PUT_UINT16_BE( hostname_len + 3, p, 0 );
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p += 2;
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*p++ = MBEDTLS_BYTE_0( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME );
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MBEDTLS_PUT_UINT16_BE( hostname_len, p, 0 );
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p += 2;
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memcpy( p, ssl->hostname, hostname_len );
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*olen = hostname_len + 9;
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return( 0 );
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}
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#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
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#if defined(MBEDTLS_SSL_ALPN)
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/*
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* ssl_write_alpn_ext()
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@ -116,6 +186,233 @@ static int ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
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}
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#endif /* MBEDTLS_SSL_ALPN */
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#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
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defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
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/*
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* Function for writing a supported groups (TLS 1.3) or supported elliptic
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* curves (TLS 1.2) extension.
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*
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* The "extension_data" field of a supported groups extension contains a
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* "NamedGroupList" value (TLS 1.3 RFC8446):
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* enum {
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* secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019),
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* x25519(0x001D), x448(0x001E),
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* ffdhe2048(0x0100), ffdhe3072(0x0101), ffdhe4096(0x0102),
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* ffdhe6144(0x0103), ffdhe8192(0x0104),
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* ffdhe_private_use(0x01FC..0x01FF),
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* ecdhe_private_use(0xFE00..0xFEFF),
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* (0xFFFF)
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* } NamedGroup;
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* struct {
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* NamedGroup named_group_list<2..2^16-1>;
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* } NamedGroupList;
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*
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* The "extension_data" field of a supported elliptic curves extension contains
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* a "NamedCurveList" value (TLS 1.2 RFC 8422):
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* enum {
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* deprecated(1..22),
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* secp256r1 (23), secp384r1 (24), secp521r1 (25),
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* x25519(29), x448(30),
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* reserved (0xFE00..0xFEFF),
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* deprecated(0xFF01..0xFF02),
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* (0xFFFF)
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* } NamedCurve;
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* struct {
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* NamedCurve named_curve_list<2..2^16-1>
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* } NamedCurveList;
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*
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* The TLS 1.3 supported groups extension was defined to be a compatible
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* generalization of the TLS 1.2 supported elliptic curves extension. They both
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* share the same extension identifier.
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*
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* DHE groups are not supported yet.
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*/
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static int ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
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unsigned char *buf,
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const unsigned char *end,
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size_t *out_len )
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{
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unsigned char *p = buf ;
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unsigned char *named_group_list; /* Start of named_group_list */
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size_t named_group_list_len; /* Length of named_group_list */
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const uint16_t *group_list = mbedtls_ssl_get_groups( ssl );
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*out_len = 0;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_groups extension" ) );
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/* Check if we have space for header and length fields:
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* - extension_type (2 bytes)
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* - extension_data_length (2 bytes)
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* - named_group_list_length (2 bytes)
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*/
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
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p += 6;
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named_group_list = p;
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if( group_list == NULL )
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return( MBEDTLS_ERR_SSL_BAD_CONFIG );
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for( ; *group_list != 0; group_list++ )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "got supported group(%04x)", *group_list ) );
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#if defined(MBEDTLS_ECP_C)
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if( ( mbedtls_ssl_conf_is_tls13_enabled( ssl->conf ) &&
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mbedtls_ssl_tls13_named_group_is_ecdhe( *group_list ) ) ||
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( mbedtls_ssl_conf_is_tls12_enabled( ssl->conf ) &&
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mbedtls_ssl_tls12_named_group_is_ecdhe( *group_list ) ) )
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{
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const mbedtls_ecp_curve_info *curve_info;
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curve_info = mbedtls_ecp_curve_info_from_tls_id( *group_list );
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if( curve_info == NULL )
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continue;
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
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MBEDTLS_PUT_UINT16_BE( *group_list, p, 0 );
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p += 2;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "NamedGroup: %s ( %x )",
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curve_info->name, *group_list ) );
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}
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#endif /* MBEDTLS_ECP_C */
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/* Add DHE groups here */
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}
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/* Length of named_group_list */
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named_group_list_len = p - named_group_list;
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if( named_group_list_len == 0 )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "No group available." ) );
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return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
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}
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/* Write extension_type */
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MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SUPPORTED_GROUPS, buf, 0 );
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/* Write extension_data_length */
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MBEDTLS_PUT_UINT16_BE( named_group_list_len + 2, buf, 2 );
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/* Write length of named_group_list */
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MBEDTLS_PUT_UINT16_BE( named_group_list_len, buf, 4 );
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MBEDTLS_SSL_DEBUG_BUF( 3, "Supported groups extension",
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buf + 4, named_group_list_len + 2 );
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*out_len = p - buf;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
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ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SUPPORTED_GROUPS;
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#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
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return( 0 );
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}
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#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
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MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
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#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
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/*
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* Function for writing a signature algorithm extension.
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*
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* The `extension_data` field of signature algorithm contains a `SignatureSchemeList`
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* value (TLS 1.3 RFC8446):
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* enum {
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* ....
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* ecdsa_secp256r1_sha256( 0x0403 ),
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* ecdsa_secp384r1_sha384( 0x0503 ),
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* ecdsa_secp521r1_sha512( 0x0603 ),
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* ....
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* } SignatureScheme;
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*
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* struct {
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* SignatureScheme supported_signature_algorithms<2..2^16-2>;
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* } SignatureSchemeList;
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*
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* The `extension_data` field of signature algorithm contains a `SignatureAndHashAlgorithm`
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* value (TLS 1.2 RFC5246):
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* enum {
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* none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
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* sha512(6), (255)
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* } HashAlgorithm;
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*
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* enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
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* SignatureAlgorithm;
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*
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* struct {
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* HashAlgorithm hash;
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* SignatureAlgorithm signature;
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* } SignatureAndHashAlgorithm;
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*
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* SignatureAndHashAlgorithm
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* supported_signature_algorithms<2..2^16-2>;
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*
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* The TLS 1.3 signature algorithm extension was defined to be a compatible
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* generalization of the TLS 1.2 signature algorithm extension.
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* `SignatureAndHashAlgorithm` field of TLS 1.2 can be represented by
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* `SignatureScheme` field of TLS 1.3
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*
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*/
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static int ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
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const unsigned char *end, size_t *out_len )
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{
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unsigned char *p = buf;
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unsigned char *supported_sig_alg; /* Start of supported_signature_algorithms */
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size_t supported_sig_alg_len = 0; /* Length of supported_signature_algorithms */
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*out_len = 0;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding signature_algorithms extension" ) );
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/* Check if we have space for header and length field:
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* - extension_type (2 bytes)
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* - extension_data_length (2 bytes)
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* - supported_signature_algorithms_length (2 bytes)
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*/
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 6 );
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p += 6;
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/*
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* Write supported_signature_algorithms
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*/
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supported_sig_alg = p;
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const uint16_t *sig_alg = mbedtls_ssl_get_sig_algs( ssl );
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if( sig_alg == NULL )
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return( MBEDTLS_ERR_SSL_BAD_CONFIG );
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for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE; sig_alg++ )
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{
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if( ! mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg ) )
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continue;
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MBEDTLS_SSL_CHK_BUF_PTR( p, end, 2 );
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MBEDTLS_PUT_UINT16_BE( *sig_alg, p, 0 );
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p += 2;
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MBEDTLS_SSL_DEBUG_MSG( 3, ( "signature scheme [%x]", *sig_alg ) );
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}
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/* Length of supported_signature_algorithms */
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supported_sig_alg_len = p - supported_sig_alg;
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if( supported_sig_alg_len == 0 )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "No signature algorithms defined." ) );
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return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
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}
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/* Write extension_type */
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MBEDTLS_PUT_UINT16_BE( MBEDTLS_TLS_EXT_SIG_ALG, buf, 0 );
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/* Write extension_data_length */
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MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len + 2, buf, 2 );
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/* Write length of supported_signature_algorithms */
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MBEDTLS_PUT_UINT16_BE( supported_sig_alg_len, buf, 4 );
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/* Output the total length of signature algorithms extension. */
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*out_len = p - buf;
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#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
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ssl->handshake->extensions_present |= MBEDTLS_SSL_EXT_SIG_ALG;
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#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
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return( 0 );
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}
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#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */
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/* Write cipher_suites
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* CipherSuite cipher_suites<2..2^16-2>;
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*/
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@ -431,7 +728,7 @@ static int ssl_write_client_hello_body( mbedtls_ssl_context *ssl,
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#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
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/* Write server name extension */
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ret = mbedtls_ssl_write_hostname_ext( ssl, p, end, &output_len );
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ret = ssl_write_hostname_ext( ssl, p, end, &output_len );
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if( ret != 0 )
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return( ret );
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p += output_len;
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@ -467,7 +764,7 @@ static int ssl_write_client_hello_body( mbedtls_ssl_context *ssl,
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#endif
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0 )
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{
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ret = mbedtls_ssl_write_supported_groups_ext( ssl, p, end, &output_len );
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ret = ssl_write_supported_groups_ext( ssl, p, end, &output_len );
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if( ret != 0 )
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return( ret );
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p += output_len;
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@ -484,7 +781,7 @@ static int ssl_write_client_hello_body( mbedtls_ssl_context *ssl,
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#endif
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0 )
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{
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ret = mbedtls_ssl_write_sig_alg_ext( ssl, p, end, &output_len );
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ret = ssl_write_sig_alg_ext( ssl, p, end, &output_len );
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if( ret != 0 )
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return( ret );
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p += output_len;
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@ -1164,13 +1164,6 @@ void mbedtls_ssl_set_inbound_transform( mbedtls_ssl_context *ssl,
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void mbedtls_ssl_set_outbound_transform( mbedtls_ssl_context *ssl,
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mbedtls_ssl_transform *transform );
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#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
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int mbedtls_ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
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unsigned char *buf,
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const unsigned char *end,
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size_t *olen );
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#endif
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int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl );
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int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl );
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void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );
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@ -1833,12 +1826,6 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl );
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#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
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#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
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/*
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* Write Signature Algorithm extension
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*/
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int mbedtls_ssl_write_sig_alg_ext( mbedtls_ssl_context *ssl, unsigned char *buf,
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const unsigned char *end, size_t *out_len );
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/*
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* Parse TLS 1.3 Signature Algorithm extension
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*/
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@ -1916,15 +1903,6 @@ static inline int mbedtls_ssl_tls13_named_group_is_dhe( uint16_t named_group )
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named_group <= MBEDTLS_SSL_IANA_TLS_GROUP_FFDHE8192 );
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}
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#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
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defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
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int mbedtls_ssl_write_supported_groups_ext( mbedtls_ssl_context *ssl,
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unsigned char *buf,
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const unsigned char *end,
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size_t *out_len );
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#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
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MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
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/*
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* Return supported signature algorithms.
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*
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@ -4685,305 +4685,6 @@ int mbedtls_ssl_get_handshake_transcript( mbedtls_ssl_context *ssl,
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#endif /* !MBEDTLS_USE_PSA_CRYPTO */
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#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) || \
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defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
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defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
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/*
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* Function for writing a supported groups (TLS 1.3) or supported elliptic
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* curves (TLS 1.2) extension.
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*
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* The "extension_data" field of a supported groups extension contains a
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* "NamedGroupList" value (TLS 1.3 RFC8446):
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* enum {
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* secp256r1(0x0017), secp384r1(0x0018), secp521r1(0x0019),
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* x25519(0x001D), x448(0x001E),
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* ffdhe2048(0x0100), ffdhe3072(0x0101), ffdhe4096(0x0102),
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* ffdhe6144(0x0103), ffdhe8192(0x0104),
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* ffdhe_private_use(0x01FC..0x01FF),
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* ecdhe_private_use(0xFE00..0xFEFF),
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* (0xFFFF)
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* } NamedGroup;
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* struct {
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* NamedGroup named_group_list<2..2^16-1>;
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* } NamedGroupList;
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*
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* The "extension_data" field of a supported elliptic curves extension contains
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* a "NamedCurveList" value (TLS 1.2 RFC 8422):
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* enum {
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* deprecated(1..22),
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* secp256r1 (23), secp384r1 (24), secp521r1 (25),
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* x25519(29), x448(30),
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* reserved (0xFE00..0xFEFF),
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* deprecated(0xFF01..0xFF02),
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||||
* (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)
|
||||
|
|
|
|||
Loading…
Reference in a new issue