diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/ssl_tls.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/ssl_tls.c | 7650 |
1 files changed, 0 insertions, 7650 deletions
diff --git a/lib/mbedtls-2.27.0/library/ssl_tls.c b/lib/mbedtls-2.27.0/library/ssl_tls.c deleted file mode 100644 index 976a87c..0000000 --- a/lib/mbedtls-2.27.0/library/ssl_tls.c +++ /dev/null @@ -1,7650 +0,0 @@ -/* - * SSLv3/TLSv1 shared functions - * - * Copyright The Mbed TLS Contributors - * 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. - */ -/* - * The SSL 3.0 specification was drafted by Netscape in 1996, - * and became an IETF standard in 1999. - * - * http://wp.netscape.com/eng/ssl3/ - * http://www.ietf.org/rfc/rfc2246.txt - * http://www.ietf.org/rfc/rfc4346.txt - */ - -#include "common.h" - -#if defined(MBEDTLS_SSL_TLS_C) - -#if defined(MBEDTLS_PLATFORM_C) -#include "mbedtls/platform.h" -#else -#include <stdlib.h> -#define mbedtls_calloc calloc -#define mbedtls_free free -#endif - -#include "mbedtls/ssl.h" -#include "mbedtls/ssl_internal.h" -#include "mbedtls/debug.h" -#include "mbedtls/error.h" -#include "mbedtls/platform_util.h" -#include "mbedtls/version.h" - -#include <string.h> - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -#include "mbedtls/psa_util.h" -#include "psa/crypto.h" -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#include "mbedtls/oid.h" -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) -/* Top-level Connection ID API */ - -int mbedtls_ssl_conf_cid( mbedtls_ssl_config *conf, - size_t len, - int ignore_other_cid ) -{ - if( len > MBEDTLS_SSL_CID_IN_LEN_MAX ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_FAIL && - ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_IGNORE ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - conf->ignore_unexpected_cid = ignore_other_cid; - conf->cid_len = len; - return( 0 ); -} - -int mbedtls_ssl_set_cid( mbedtls_ssl_context *ssl, - int enable, - unsigned char const *own_cid, - size_t own_cid_len ) -{ - if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->negotiate_cid = enable; - if( enable == MBEDTLS_SSL_CID_DISABLED ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Disable use of CID extension." ) ); - return( 0 ); - } - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Enable use of CID extension." ) ); - MBEDTLS_SSL_DEBUG_BUF( 3, "Own CID", own_cid, own_cid_len ); - - if( own_cid_len != ssl->conf->cid_len ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "CID length %u does not match CID length %u in config", - (unsigned) own_cid_len, - (unsigned) ssl->conf->cid_len ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - memcpy( ssl->own_cid, own_cid, own_cid_len ); - /* Truncation is not an issue here because - * MBEDTLS_SSL_CID_IN_LEN_MAX at most 255. */ - ssl->own_cid_len = (uint8_t) own_cid_len; - - return( 0 ); -} - -int mbedtls_ssl_get_peer_cid( mbedtls_ssl_context *ssl, - int *enabled, - unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ], - size_t *peer_cid_len ) -{ - *enabled = MBEDTLS_SSL_CID_DISABLED; - - if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM || - ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - /* We report MBEDTLS_SSL_CID_DISABLED in case the CID extensions - * were used, but client and server requested the empty CID. - * This is indistinguishable from not using the CID extension - * in the first place. */ - if( ssl->transform_in->in_cid_len == 0 && - ssl->transform_in->out_cid_len == 0 ) - { - return( 0 ); - } - - if( peer_cid_len != NULL ) - { - *peer_cid_len = ssl->transform_in->out_cid_len; - if( peer_cid != NULL ) - { - memcpy( peer_cid, ssl->transform_in->out_cid, - ssl->transform_in->out_cid_len ); - } - } - - *enabled = MBEDTLS_SSL_CID_ENABLED; - - return( 0 ); -} -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) -/* - * Convert max_fragment_length codes to length. - * RFC 6066 says: - * enum{ - * 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255) - * } MaxFragmentLength; - * and we add 0 -> extension unused - */ -static unsigned int ssl_mfl_code_to_length( int mfl ) -{ - switch( mfl ) - { - case MBEDTLS_SSL_MAX_FRAG_LEN_NONE: - return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN ); - case MBEDTLS_SSL_MAX_FRAG_LEN_512: - return 512; - case MBEDTLS_SSL_MAX_FRAG_LEN_1024: - return 1024; - case MBEDTLS_SSL_MAX_FRAG_LEN_2048: - return 2048; - case MBEDTLS_SSL_MAX_FRAG_LEN_4096: - return 4096; - default: - return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN ); - } -} -#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */ - -int mbedtls_ssl_session_copy( mbedtls_ssl_session *dst, - const mbedtls_ssl_session *src ) -{ - mbedtls_ssl_session_free( dst ); - memcpy( dst, src, sizeof( mbedtls_ssl_session ) ); - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - if( src->peer_cert != NULL ) - { - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - dst->peer_cert = mbedtls_calloc( 1, sizeof(mbedtls_x509_crt) ); - if( dst->peer_cert == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - mbedtls_x509_crt_init( dst->peer_cert ); - - if( ( ret = mbedtls_x509_crt_parse_der( dst->peer_cert, src->peer_cert->raw.p, - src->peer_cert->raw.len ) ) != 0 ) - { - mbedtls_free( dst->peer_cert ); - dst->peer_cert = NULL; - return( ret ); - } - } -#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - if( src->peer_cert_digest != NULL ) - { - dst->peer_cert_digest = - mbedtls_calloc( 1, src->peer_cert_digest_len ); - if( dst->peer_cert_digest == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - memcpy( dst->peer_cert_digest, src->peer_cert_digest, - src->peer_cert_digest_len ); - dst->peer_cert_digest_type = src->peer_cert_digest_type; - dst->peer_cert_digest_len = src->peer_cert_digest_len; - } -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C) - if( src->ticket != NULL ) - { - dst->ticket = mbedtls_calloc( 1, src->ticket_len ); - if( dst->ticket == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - memcpy( dst->ticket, src->ticket, src->ticket_len ); - } -#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */ - - return( 0 ); -} - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) -static int resize_buffer( unsigned char **buffer, size_t len_new, size_t *len_old ) -{ - unsigned char* resized_buffer = mbedtls_calloc( 1, len_new ); - if( resized_buffer == NULL ) - return -1; - - /* We want to copy len_new bytes when downsizing the buffer, and - * len_old bytes when upsizing, so we choose the smaller of two sizes, - * to fit one buffer into another. Size checks, ensuring that no data is - * lost, are done outside of this function. */ - memcpy( resized_buffer, *buffer, - ( len_new < *len_old ) ? len_new : *len_old ); - mbedtls_platform_zeroize( *buffer, *len_old ); - mbedtls_free( *buffer ); - - *buffer = resized_buffer; - *len_old = len_new; - - return 0; -} - -static void handle_buffer_resizing( mbedtls_ssl_context *ssl, int downsizing, - size_t in_buf_new_len, - size_t out_buf_new_len ) -{ - int modified = 0; - size_t written_in = 0, iv_offset_in = 0, len_offset_in = 0; - size_t written_out = 0, iv_offset_out = 0, len_offset_out = 0; - if( ssl->in_buf != NULL ) - { - written_in = ssl->in_msg - ssl->in_buf; - iv_offset_in = ssl->in_iv - ssl->in_buf; - len_offset_in = ssl->in_len - ssl->in_buf; - if( downsizing ? - ssl->in_buf_len > in_buf_new_len && ssl->in_left < in_buf_new_len : - ssl->in_buf_len < in_buf_new_len ) - { - if( resize_buffer( &ssl->in_buf, in_buf_new_len, &ssl->in_buf_len ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) ); - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %" MBEDTLS_PRINTF_SIZET, - in_buf_new_len ) ); - modified = 1; - } - } - } - - if( ssl->out_buf != NULL ) - { - written_out = ssl->out_msg - ssl->out_buf; - iv_offset_out = ssl->out_iv - ssl->out_buf; - len_offset_out = ssl->out_len - ssl->out_buf; - if( downsizing ? - ssl->out_buf_len > out_buf_new_len && ssl->out_left < out_buf_new_len : - ssl->out_buf_len < out_buf_new_len ) - { - if( resize_buffer( &ssl->out_buf, out_buf_new_len, &ssl->out_buf_len ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) ); - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %" MBEDTLS_PRINTF_SIZET, - out_buf_new_len ) ); - modified = 1; - } - } - } - if( modified ) - { - /* Update pointers here to avoid doing it twice. */ - mbedtls_ssl_reset_in_out_pointers( ssl ); - /* Fields below might not be properly updated with record - * splitting or with CID, so they are manually updated here. */ - ssl->out_msg = ssl->out_buf + written_out; - ssl->out_len = ssl->out_buf + len_offset_out; - ssl->out_iv = ssl->out_buf + iv_offset_out; - - ssl->in_msg = ssl->in_buf + written_in; - ssl->in_len = ssl->in_buf + len_offset_in; - ssl->in_iv = ssl->in_buf + iv_offset_in; - } -} -#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */ - -/* - * Key material generation - */ -#if defined(MBEDTLS_SSL_PROTO_SSL3) -static int ssl3_prf( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - int ret = 0; - size_t i; - mbedtls_md5_context md5; - mbedtls_sha1_context sha1; - unsigned char padding[16]; - unsigned char sha1sum[20]; - ((void)label); - - mbedtls_md5_init( &md5 ); - mbedtls_sha1_init( &sha1 ); - - /* - * SSLv3: - * block = - * MD5( secret + SHA1( 'A' + secret + random ) ) + - * MD5( secret + SHA1( 'BB' + secret + random ) ) + - * MD5( secret + SHA1( 'CCC' + secret + random ) ) + - * ... - */ - for( i = 0; i < dlen / 16; i++ ) - { - memset( padding, (unsigned char) ('A' + i), 1 + i ); - - if( ( ret = mbedtls_sha1_starts_ret( &sha1 ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_sha1_update_ret( &sha1, padding, 1 + i ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_sha1_update_ret( &sha1, secret, slen ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_sha1_update_ret( &sha1, random, rlen ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_sha1_finish_ret( &sha1, sha1sum ) ) != 0 ) - goto exit; - - if( ( ret = mbedtls_md5_starts_ret( &md5 ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_md5_update_ret( &md5, secret, slen ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_md5_update_ret( &md5, sha1sum, 20 ) ) != 0 ) - goto exit; - if( ( ret = mbedtls_md5_finish_ret( &md5, dstbuf + i * 16 ) ) != 0 ) - goto exit; - } - -exit: - mbedtls_md5_free( &md5 ); - mbedtls_sha1_free( &sha1 ); - - mbedtls_platform_zeroize( padding, sizeof( padding ) ); - mbedtls_platform_zeroize( sha1sum, sizeof( sha1sum ) ); - - return( ret ); -} -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) -static int tls1_prf( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - size_t nb, hs; - size_t i, j, k; - const unsigned char *S1, *S2; - unsigned char *tmp; - size_t tmp_len = 0; - unsigned char h_i[20]; - const mbedtls_md_info_t *md_info; - mbedtls_md_context_t md_ctx; - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - mbedtls_md_init( &md_ctx ); - - tmp_len = 20 + strlen( label ) + rlen; - tmp = mbedtls_calloc( 1, tmp_len ); - if( tmp == NULL ) - { - ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; - goto exit; - } - - hs = ( slen + 1 ) / 2; - S1 = secret; - S2 = secret + slen - hs; - - nb = strlen( label ); - memcpy( tmp + 20, label, nb ); - memcpy( tmp + 20 + nb, random, rlen ); - nb += rlen; - - /* - * First compute P_md5(secret,label+random)[0..dlen] - */ - if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ) ) == NULL ) - { - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto exit; - } - - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 ) - { - goto exit; - } - - mbedtls_md_hmac_starts( &md_ctx, S1, hs ); - mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb ); - mbedtls_md_hmac_finish( &md_ctx, 4 + tmp ); - - for( i = 0; i < dlen; i += 16 ) - { - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 + nb ); - mbedtls_md_hmac_finish( &md_ctx, h_i ); - - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 ); - mbedtls_md_hmac_finish( &md_ctx, 4 + tmp ); - - k = ( i + 16 > dlen ) ? dlen % 16 : 16; - - for( j = 0; j < k; j++ ) - dstbuf[i + j] = h_i[j]; - } - - mbedtls_md_free( &md_ctx ); - - /* - * XOR out with P_sha1(secret,label+random)[0..dlen] - */ - if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ) ) == NULL ) - { - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto exit; - } - - if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 ) - { - goto exit; - } - - mbedtls_md_hmac_starts( &md_ctx, S2, hs ); - mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb ); - mbedtls_md_hmac_finish( &md_ctx, tmp ); - - for( i = 0; i < dlen; i += 20 ) - { - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, tmp, 20 + nb ); - mbedtls_md_hmac_finish( &md_ctx, h_i ); - - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, tmp, 20 ); - mbedtls_md_hmac_finish( &md_ctx, tmp ); - - k = ( i + 20 > dlen ) ? dlen % 20 : 20; - - for( j = 0; j < k; j++ ) - dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] ); - } - -exit: - mbedtls_md_free( &md_ctx ); - - mbedtls_platform_zeroize( tmp, tmp_len ); - mbedtls_platform_zeroize( h_i, sizeof( h_i ) ); - - mbedtls_free( tmp ); - return( ret ); -} -#endif /* MBEDTLS_SSL_PROTO_TLS1) || MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - -static psa_status_t setup_psa_key_derivation( psa_key_derivation_operation_t* derivation, - psa_key_id_t key, - psa_algorithm_t alg, - const unsigned char* seed, size_t seed_length, - const unsigned char* label, size_t label_length, - size_t capacity ) -{ - psa_status_t status; - - status = psa_key_derivation_setup( derivation, alg ); - if( status != PSA_SUCCESS ) - return( status ); - - if( PSA_ALG_IS_TLS12_PRF( alg ) || PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) ) - { - status = psa_key_derivation_input_bytes( derivation, - PSA_KEY_DERIVATION_INPUT_SEED, - seed, seed_length ); - if( status != PSA_SUCCESS ) - return( status ); - - if( mbedtls_svc_key_id_is_null( key ) ) - { - status = psa_key_derivation_input_bytes( - derivation, PSA_KEY_DERIVATION_INPUT_SECRET, - NULL, 0 ); - } - else - { - status = psa_key_derivation_input_key( - derivation, PSA_KEY_DERIVATION_INPUT_SECRET, key ); - } - if( status != PSA_SUCCESS ) - return( status ); - - status = psa_key_derivation_input_bytes( derivation, - PSA_KEY_DERIVATION_INPUT_LABEL, - label, label_length ); - if( status != PSA_SUCCESS ) - return( status ); - } - else - { - return( PSA_ERROR_NOT_SUPPORTED ); - } - - status = psa_key_derivation_set_capacity( derivation, capacity ); - if( status != PSA_SUCCESS ) - return( status ); - - return( PSA_SUCCESS ); -} - -static int tls_prf_generic( mbedtls_md_type_t md_type, - const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - psa_status_t status; - psa_algorithm_t alg; - psa_key_id_t master_key = MBEDTLS_SVC_KEY_ID_INIT; - psa_key_derivation_operation_t derivation = - PSA_KEY_DERIVATION_OPERATION_INIT; - - if( md_type == MBEDTLS_MD_SHA384 ) - alg = PSA_ALG_TLS12_PRF(PSA_ALG_SHA_384); - else - alg = PSA_ALG_TLS12_PRF(PSA_ALG_SHA_256); - - /* Normally a "secret" should be long enough to be impossible to - * find by brute force, and in particular should not be empty. But - * this PRF is also used to derive an IV, in particular in EAP-TLS, - * and for this use case it makes sense to have a 0-length "secret". - * Since the key API doesn't allow importing a key of length 0, - * keep master_key=0, which setup_psa_key_derivation() understands - * to mean a 0-length "secret" input. */ - if( slen != 0 ) - { - psa_key_attributes_t key_attributes = psa_key_attributes_init(); - psa_set_key_usage_flags( &key_attributes, PSA_KEY_USAGE_DERIVE ); - psa_set_key_algorithm( &key_attributes, alg ); - psa_set_key_type( &key_attributes, PSA_KEY_TYPE_DERIVE ); - - status = psa_import_key( &key_attributes, secret, slen, &master_key ); - if( status != PSA_SUCCESS ) - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - status = setup_psa_key_derivation( &derivation, - master_key, alg, - random, rlen, - (unsigned char const *) label, - (size_t) strlen( label ), - dlen ); - if( status != PSA_SUCCESS ) - { - psa_key_derivation_abort( &derivation ); - psa_destroy_key( master_key ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - status = psa_key_derivation_output_bytes( &derivation, dstbuf, dlen ); - if( status != PSA_SUCCESS ) - { - psa_key_derivation_abort( &derivation ); - psa_destroy_key( master_key ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - status = psa_key_derivation_abort( &derivation ); - if( status != PSA_SUCCESS ) - { - psa_destroy_key( master_key ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - if( ! mbedtls_svc_key_id_is_null( master_key ) ) - status = psa_destroy_key( master_key ); - if( status != PSA_SUCCESS ) - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - - return( 0 ); -} - -#else /* MBEDTLS_USE_PSA_CRYPTO */ - -static int tls_prf_generic( mbedtls_md_type_t md_type, - const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - size_t nb; - size_t i, j, k, md_len; - unsigned char *tmp; - size_t tmp_len = 0; - unsigned char h_i[MBEDTLS_MD_MAX_SIZE]; - const mbedtls_md_info_t *md_info; - mbedtls_md_context_t md_ctx; - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - mbedtls_md_init( &md_ctx ); - - if( ( md_info = mbedtls_md_info_from_type( md_type ) ) == NULL ) - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - - md_len = mbedtls_md_get_size( md_info ); - - tmp_len = md_len + strlen( label ) + rlen; - tmp = mbedtls_calloc( 1, tmp_len ); - if( tmp == NULL ) - { - ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; - goto exit; - } - - nb = strlen( label ); - memcpy( tmp + md_len, label, nb ); - memcpy( tmp + md_len + nb, random, rlen ); - nb += rlen; - - /* - * Compute P_<hash>(secret, label + random)[0..dlen] - */ - if ( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 ) - goto exit; - - mbedtls_md_hmac_starts( &md_ctx, secret, slen ); - mbedtls_md_hmac_update( &md_ctx, tmp + md_len, nb ); - mbedtls_md_hmac_finish( &md_ctx, tmp ); - - for( i = 0; i < dlen; i += md_len ) - { - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, tmp, md_len + nb ); - mbedtls_md_hmac_finish( &md_ctx, h_i ); - - mbedtls_md_hmac_reset ( &md_ctx ); - mbedtls_md_hmac_update( &md_ctx, tmp, md_len ); - mbedtls_md_hmac_finish( &md_ctx, tmp ); - - k = ( i + md_len > dlen ) ? dlen % md_len : md_len; - - for( j = 0; j < k; j++ ) - dstbuf[i + j] = h_i[j]; - } - -exit: - mbedtls_md_free( &md_ctx ); - - mbedtls_platform_zeroize( tmp, tmp_len ); - mbedtls_platform_zeroize( h_i, sizeof( h_i ) ); - - mbedtls_free( tmp ); - - return( ret ); -} -#endif /* MBEDTLS_USE_PSA_CRYPTO */ -#if defined(MBEDTLS_SHA256_C) -static int tls_prf_sha256( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - return( tls_prf_generic( MBEDTLS_MD_SHA256, secret, slen, - label, random, rlen, dstbuf, dlen ) ); -} -#endif /* MBEDTLS_SHA256_C */ - -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -static int tls_prf_sha384( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - return( tls_prf_generic( MBEDTLS_MD_SHA384, secret, slen, - label, random, rlen, dstbuf, dlen ) ); -} -#endif /* MBEDTLS_SHA512_C && !MBEDTLS_SHA512_NO_SHA384 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -static void ssl_update_checksum_start( mbedtls_ssl_context *, const unsigned char *, size_t ); - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) -static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *, const unsigned char *, size_t ); -#endif - -#if defined(MBEDTLS_SSL_PROTO_SSL3) -static void ssl_calc_verify_ssl( const mbedtls_ssl_context *, unsigned char *, size_t * ); -static void ssl_calc_finished_ssl( mbedtls_ssl_context *, unsigned char *, int ); -#endif - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) -static void ssl_calc_verify_tls( const mbedtls_ssl_context *, unsigned char*, size_t * ); -static void ssl_calc_finished_tls( mbedtls_ssl_context *, unsigned char *, int ); -#endif - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -static void ssl_update_checksum_sha256( mbedtls_ssl_context *, const unsigned char *, size_t ); -static void ssl_calc_verify_tls_sha256( const mbedtls_ssl_context *,unsigned char*, size_t * ); -static void ssl_calc_finished_tls_sha256( mbedtls_ssl_context *,unsigned char *, int ); -#endif - -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -static void ssl_update_checksum_sha384( mbedtls_ssl_context *, const unsigned char *, size_t ); -static void ssl_calc_verify_tls_sha384( const mbedtls_ssl_context *, unsigned char*, size_t * ); -static void ssl_calc_finished_tls_sha384( mbedtls_ssl_context *, unsigned char *, int ); -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) && \ - defined(MBEDTLS_USE_PSA_CRYPTO) -static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl ) -{ - if( ssl->conf->f_psk != NULL ) - { - /* If we've used a callback to select the PSK, - * the static configuration is irrelevant. */ - if( ! mbedtls_svc_key_id_is_null( ssl->handshake->psk_opaque ) ) - return( 1 ); - - return( 0 ); - } - - if( ! mbedtls_svc_key_id_is_null( ssl->conf->psk_opaque ) ) - return( 1 ); - - return( 0 ); -} -#endif /* MBEDTLS_USE_PSA_CRYPTO && - MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */ - -#if defined(MBEDTLS_SSL_EXPORT_KEYS) -static mbedtls_tls_prf_types tls_prf_get_type( mbedtls_ssl_tls_prf_cb *tls_prf ) -{ -#if defined(MBEDTLS_SSL_PROTO_SSL3) - if( tls_prf == ssl3_prf ) - { - return( MBEDTLS_SSL_TLS_PRF_SSL3 ); - } - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) - if( tls_prf == tls1_prf ) - { - return( MBEDTLS_SSL_TLS_PRF_TLS1 ); - } - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - if( tls_prf == tls_prf_sha384 ) - { - return( MBEDTLS_SSL_TLS_PRF_SHA384 ); - } - else -#endif -#if defined(MBEDTLS_SHA256_C) - if( tls_prf == tls_prf_sha256 ) - { - return( MBEDTLS_SSL_TLS_PRF_SHA256 ); - } - else -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - return( MBEDTLS_SSL_TLS_PRF_NONE ); -} -#endif /* MBEDTLS_SSL_EXPORT_KEYS */ - -int mbedtls_ssl_tls_prf( const mbedtls_tls_prf_types prf, - const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ) -{ - mbedtls_ssl_tls_prf_cb *tls_prf = NULL; - - switch( prf ) - { -#if defined(MBEDTLS_SSL_PROTO_SSL3) - case MBEDTLS_SSL_TLS_PRF_SSL3: - tls_prf = ssl3_prf; - break; -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) - case MBEDTLS_SSL_TLS_PRF_TLS1: - tls_prf = tls1_prf; - break; -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - case MBEDTLS_SSL_TLS_PRF_SHA384: - tls_prf = tls_prf_sha384; - break; -#endif /* MBEDTLS_SHA512_C && !MBEDTLS_SHA512_NO_SHA384 */ -#if defined(MBEDTLS_SHA256_C) - case MBEDTLS_SSL_TLS_PRF_SHA256: - tls_prf = tls_prf_sha256; - break; -#endif /* MBEDTLS_SHA256_C */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - default: - return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE ); - } - - return( tls_prf( secret, slen, label, random, rlen, dstbuf, dlen ) ); -} - -/* Type for the TLS PRF */ -typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *, - const unsigned char *, size_t, - unsigned char *, size_t); - -/* - * Populate a transform structure with session keys and all the other - * necessary information. - * - * Parameters: - * - [in/out]: transform: structure to populate - * [in] must be just initialised with mbedtls_ssl_transform_init() - * [out] fully populated, ready for use by mbedtls_ssl_{en,de}crypt_buf() - * - [in] ciphersuite - * - [in] master - * - [in] encrypt_then_mac - * - [in] trunc_hmac - * - [in] compression - * - [in] tls_prf: pointer to PRF to use for key derivation - * - [in] randbytes: buffer holding ServerHello.random + ClientHello.random - * - [in] minor_ver: SSL/TLS minor version - * - [in] endpoint: client or server - * - [in] ssl: optionally used for: - * - MBEDTLS_SSL_HW_RECORD_ACCEL: whole context (non-const) - * - MBEDTLS_SSL_EXPORT_KEYS: ssl->conf->{f,p}_export_keys - * - MBEDTLS_DEBUG_C: ssl->conf->{f,p}_dbg - */ -static int ssl_populate_transform( mbedtls_ssl_transform *transform, - int ciphersuite, - const unsigned char master[48], -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - int encrypt_then_mac, -#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */ -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - int trunc_hmac, -#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */ -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - int compression, -#endif - ssl_tls_prf_t tls_prf, - const unsigned char randbytes[64], - int minor_ver, - unsigned endpoint, -#if !defined(MBEDTLS_SSL_HW_RECORD_ACCEL) - const -#endif - mbedtls_ssl_context *ssl ) -{ - int ret = 0; -#if defined(MBEDTLS_USE_PSA_CRYPTO) - int psa_fallthrough; -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - unsigned char keyblk[256]; - unsigned char *key1; - unsigned char *key2; - unsigned char *mac_enc; - unsigned char *mac_dec; - size_t mac_key_len = 0; - size_t iv_copy_len; - unsigned keylen; - const mbedtls_ssl_ciphersuite_t *ciphersuite_info; - const mbedtls_cipher_info_t *cipher_info; - const mbedtls_md_info_t *md_info; - -#if !defined(MBEDTLS_SSL_HW_RECORD_ACCEL) && \ - !defined(MBEDTLS_SSL_EXPORT_KEYS) && \ - !defined(MBEDTLS_DEBUG_C) - ssl = NULL; /* make sure we don't use it except for those cases */ - (void) ssl; -#endif - - /* - * Some data just needs copying into the structure - */ -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) && \ - defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) - transform->encrypt_then_mac = encrypt_then_mac; -#endif - transform->minor_ver = minor_ver; - -#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION) - memcpy( transform->randbytes, randbytes, sizeof( transform->randbytes ) ); -#endif - - /* - * Get various info structures - */ - ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( ciphersuite ); - if( ciphersuite_info == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "ciphersuite info for %d not found", - ciphersuite ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - cipher_info = mbedtls_cipher_info_from_type( ciphersuite_info->cipher ); - if( cipher_info == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "cipher info for %u not found", - ciphersuite_info->cipher ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - md_info = mbedtls_md_info_from_type( ciphersuite_info->mac ); - if( md_info == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "mbedtls_md info for %u not found", - (unsigned) ciphersuite_info->mac ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - /* Copy own and peer's CID if the use of the CID - * extension has been negotiated. */ - if( ssl->handshake->cid_in_use == MBEDTLS_SSL_CID_ENABLED ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Copy CIDs into SSL transform" ) ); - - transform->in_cid_len = ssl->own_cid_len; - memcpy( transform->in_cid, ssl->own_cid, ssl->own_cid_len ); - MBEDTLS_SSL_DEBUG_BUF( 3, "Incoming CID", transform->in_cid, - transform->in_cid_len ); - - transform->out_cid_len = ssl->handshake->peer_cid_len; - memcpy( transform->out_cid, ssl->handshake->peer_cid, - ssl->handshake->peer_cid_len ); - MBEDTLS_SSL_DEBUG_BUF( 3, "Outgoing CID", transform->out_cid, - transform->out_cid_len ); - } -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - - /* - * Compute key block using the PRF - */ - ret = tls_prf( master, 48, "key expansion", randbytes, 64, keyblk, 256 ); - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret ); - return( ret ); - } - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite = %s", - mbedtls_ssl_get_ciphersuite_name( ciphersuite ) ) ); - MBEDTLS_SSL_DEBUG_BUF( 3, "master secret", master, 48 ); - MBEDTLS_SSL_DEBUG_BUF( 4, "random bytes", randbytes, 64 ); - MBEDTLS_SSL_DEBUG_BUF( 4, "key block", keyblk, 256 ); - - /* - * Determine the appropriate key, IV and MAC length. - */ - - keylen = cipher_info->key_bitlen / 8; - -#if defined(MBEDTLS_GCM_C) || \ - defined(MBEDTLS_CCM_C) || \ - defined(MBEDTLS_CHACHAPOLY_C) - if( cipher_info->mode == MBEDTLS_MODE_GCM || - cipher_info->mode == MBEDTLS_MODE_CCM || - cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY ) - { - size_t explicit_ivlen; - - transform->maclen = 0; - mac_key_len = 0; - transform->taglen = - ciphersuite_info->flags & MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16; - - /* All modes haves 96-bit IVs, but the length of the static parts vary - * with mode and version: - * - For GCM and CCM in TLS 1.2, there's a static IV of 4 Bytes - * (to be concatenated with a dynamically chosen IV of 8 Bytes) - * - For ChaChaPoly in TLS 1.2, and all modes in TLS 1.3, there's - * a static IV of 12 Bytes (to be XOR'ed with the 8 Byte record - * sequence number). - */ - transform->ivlen = 12; -#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_4 ) - { - transform->fixed_ivlen = 12; - } - else -#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */ - { - if( cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY ) - transform->fixed_ivlen = 12; - else - transform->fixed_ivlen = 4; - } - - /* Minimum length of encrypted record */ - explicit_ivlen = transform->ivlen - transform->fixed_ivlen; - transform->minlen = explicit_ivlen + transform->taglen; - } - else -#endif /* MBEDTLS_GCM_C || MBEDTLS_CCM_C || MBEDTLS_CHACHAPOLY_C */ -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) - if( cipher_info->mode == MBEDTLS_MODE_STREAM || - cipher_info->mode == MBEDTLS_MODE_CBC ) - { - /* Initialize HMAC contexts */ - if( ( ret = mbedtls_md_setup( &transform->md_ctx_enc, md_info, 1 ) ) != 0 || - ( ret = mbedtls_md_setup( &transform->md_ctx_dec, md_info, 1 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret ); - goto end; - } - - /* Get MAC length */ - mac_key_len = mbedtls_md_get_size( md_info ); - transform->maclen = mac_key_len; - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - /* - * If HMAC is to be truncated, we shall keep the leftmost bytes, - * (rfc 6066 page 13 or rfc 2104 section 4), - * so we only need to adjust the length here. - */ - if( trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED ) - { - transform->maclen = MBEDTLS_SSL_TRUNCATED_HMAC_LEN; - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT) - /* Fall back to old, non-compliant version of the truncated - * HMAC implementation which also truncates the key - * (Mbed TLS versions from 1.3 to 2.6.0) */ - mac_key_len = transform->maclen; -#endif - } -#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */ - - /* IV length */ - transform->ivlen = cipher_info->iv_size; - - /* Minimum length */ - if( cipher_info->mode == MBEDTLS_MODE_STREAM ) - transform->minlen = transform->maclen; - else - { - /* - * GenericBlockCipher: - * 1. if EtM is in use: one block plus MAC - * otherwise: * first multiple of blocklen greater than maclen - * 2. IV except for SSL3 and TLS 1.0 - */ -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - if( encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED ) - { - transform->minlen = transform->maclen - + cipher_info->block_size; - } - else -#endif - { - transform->minlen = transform->maclen - + cipher_info->block_size - - transform->maclen % cipher_info->block_size; - } - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 || - minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 ) - ; /* No need to adjust minlen */ - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_1) || defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 || - minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 ) - { - transform->minlen += transform->ivlen; - } - else -#endif - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto end; - } - } - } - else -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - } - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "keylen: %u, minlen: %u, ivlen: %u, maclen: %u", - (unsigned) keylen, - (unsigned) transform->minlen, - (unsigned) transform->ivlen, - (unsigned) transform->maclen ) ); - - /* - * Finally setup the cipher contexts, IVs and MAC secrets. - */ -#if defined(MBEDTLS_SSL_CLI_C) - if( endpoint == MBEDTLS_SSL_IS_CLIENT ) - { - key1 = keyblk + mac_key_len * 2; - key2 = keyblk + mac_key_len * 2 + keylen; - - mac_enc = keyblk; - mac_dec = keyblk + mac_key_len; - - /* - * This is not used in TLS v1.1. - */ - iv_copy_len = ( transform->fixed_ivlen ) ? - transform->fixed_ivlen : transform->ivlen; - memcpy( transform->iv_enc, key2 + keylen, iv_copy_len ); - memcpy( transform->iv_dec, key2 + keylen + iv_copy_len, - iv_copy_len ); - } - else -#endif /* MBEDTLS_SSL_CLI_C */ -#if defined(MBEDTLS_SSL_SRV_C) - if( endpoint == MBEDTLS_SSL_IS_SERVER ) - { - key1 = keyblk + mac_key_len * 2 + keylen; - key2 = keyblk + mac_key_len * 2; - - mac_enc = keyblk + mac_key_len; - mac_dec = keyblk; - - /* - * This is not used in TLS v1.1. - */ - iv_copy_len = ( transform->fixed_ivlen ) ? - transform->fixed_ivlen : transform->ivlen; - memcpy( transform->iv_dec, key1 + keylen, iv_copy_len ); - memcpy( transform->iv_enc, key1 + keylen + iv_copy_len, - iv_copy_len ); - } - else -#endif /* MBEDTLS_SSL_SRV_C */ - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto end; - } - -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) -#if defined(MBEDTLS_SSL_PROTO_SSL3) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) - { - if( mac_key_len > sizeof( transform->mac_enc ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto end; - } - - memcpy( transform->mac_enc, mac_enc, mac_key_len ); - memcpy( transform->mac_dec, mac_dec, mac_key_len ); - } - else -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 ) - { - /* For HMAC-based ciphersuites, initialize the HMAC transforms. - For AEAD-based ciphersuites, there is nothing to do here. */ - if( mac_key_len != 0 ) - { - mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, mac_key_len ); - mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, mac_key_len ); - } - } - else -#endif - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR; - goto end; - } -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ - -#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL) - if( mbedtls_ssl_hw_record_init != NULL ) - { - ret = 0; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_init()" ) ); - - if( ( ret = mbedtls_ssl_hw_record_init( ssl, key1, key2, keylen, - transform->iv_enc, transform->iv_dec, - iv_copy_len, - mac_enc, mac_dec, - mac_key_len ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_init", ret ); - ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED; - goto end; - } - } -#else - ((void) mac_dec); - ((void) mac_enc); -#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */ - -#if defined(MBEDTLS_SSL_EXPORT_KEYS) - if( ssl->conf->f_export_keys != NULL ) - { - ssl->conf->f_export_keys( ssl->conf->p_export_keys, - master, keyblk, - mac_key_len, keylen, - iv_copy_len ); - } - - if( ssl->conf->f_export_keys_ext != NULL ) - { - ssl->conf->f_export_keys_ext( ssl->conf->p_export_keys, - master, keyblk, - mac_key_len, keylen, - iv_copy_len, - randbytes + 32, - randbytes, - tls_prf_get_type( tls_prf ) ); - } -#endif - -#if defined(MBEDTLS_USE_PSA_CRYPTO) - - /* Only use PSA-based ciphers for TLS-1.2. - * That's relevant at least for TLS-1.0, where - * we assume that mbedtls_cipher_crypt() updates - * the structure field for the IV, which the PSA-based - * implementation currently doesn't. */ -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 ) - { - ret = mbedtls_cipher_setup_psa( &transform->cipher_ctx_enc, - cipher_info, transform->taglen ); - if( ret != 0 && ret != MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup_psa", ret ); - goto end; - } - - if( ret == 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Successfully setup PSA-based encryption cipher context" ) ); - psa_fallthrough = 0; - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to setup PSA-based cipher context for record encryption - fall through to default setup." ) ); - psa_fallthrough = 1; - } - } - else - psa_fallthrough = 1; -#else - psa_fallthrough = 1; -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - - if( psa_fallthrough == 1 ) -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_enc, - cipher_info ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret ); - goto end; - } - -#if defined(MBEDTLS_USE_PSA_CRYPTO) - /* Only use PSA-based ciphers for TLS-1.2. - * That's relevant at least for TLS-1.0, where - * we assume that mbedtls_cipher_crypt() updates - * the structure field for the IV, which the PSA-based - * implementation currently doesn't. */ -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 ) - { - ret = mbedtls_cipher_setup_psa( &transform->cipher_ctx_dec, - cipher_info, transform->taglen ); - if( ret != 0 && ret != MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup_psa", ret ); - goto end; - } - - if( ret == 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Successfully setup PSA-based decryption cipher context" ) ); - psa_fallthrough = 0; - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to setup PSA-based cipher context for record decryption - fall through to default setup." ) ); - psa_fallthrough = 1; - } - } - else - psa_fallthrough = 1; -#else - psa_fallthrough = 1; -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - - if( psa_fallthrough == 1 ) -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_dec, - cipher_info ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret ); - goto end; - } - - if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_enc, key1, - cipher_info->key_bitlen, - MBEDTLS_ENCRYPT ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret ); - goto end; - } - - if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_dec, key2, - cipher_info->key_bitlen, - MBEDTLS_DECRYPT ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret ); - goto end; - } - -#if defined(MBEDTLS_CIPHER_MODE_CBC) - if( cipher_info->mode == MBEDTLS_MODE_CBC ) - { - if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_enc, - MBEDTLS_PADDING_NONE ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret ); - goto end; - } - - if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_dec, - MBEDTLS_PADDING_NONE ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret ); - goto end; - } - } -#endif /* MBEDTLS_CIPHER_MODE_CBC */ - - - /* Initialize Zlib contexts */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - if( compression == MBEDTLS_SSL_COMPRESS_DEFLATE ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) ); - - memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) ); - memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) ); - - if( deflateInit( &transform->ctx_deflate, - Z_DEFAULT_COMPRESSION ) != Z_OK || - inflateInit( &transform->ctx_inflate ) != Z_OK ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) ); - ret = MBEDTLS_ERR_SSL_COMPRESSION_FAILED; - goto end; - } - } -#endif /* MBEDTLS_ZLIB_SUPPORT */ - -end: - mbedtls_platform_zeroize( keyblk, sizeof( keyblk ) ); - return( ret ); -} - -/* - * Set appropriate PRF function and other SSL / TLS 1.0/1.1 / TLS1.2 functions - * - * Inputs: - * - SSL/TLS minor version - * - hash associated with the ciphersuite (only used by TLS 1.2) - * - * Outputs: - * - the tls_prf, calc_verify and calc_finished members of handshake structure - */ -static int ssl_set_handshake_prfs( mbedtls_ssl_handshake_params *handshake, - int minor_ver, - mbedtls_md_type_t hash ) -{ -#if !defined(MBEDTLS_SSL_PROTO_TLS1_2) || \ - !( defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) ) - (void) hash; -#endif - -#if defined(MBEDTLS_SSL_PROTO_SSL3) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) - { - handshake->tls_prf = ssl3_prf; - handshake->calc_verify = ssl_calc_verify_ssl; - handshake->calc_finished = ssl_calc_finished_ssl; - } - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) - if( minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 ) - { - handshake->tls_prf = tls1_prf; - handshake->calc_verify = ssl_calc_verify_tls; - handshake->calc_finished = ssl_calc_finished_tls; - } - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 && - hash == MBEDTLS_MD_SHA384 ) - { - handshake->tls_prf = tls_prf_sha384; - handshake->calc_verify = ssl_calc_verify_tls_sha384; - handshake->calc_finished = ssl_calc_finished_tls_sha384; - } - else -#endif -#if defined(MBEDTLS_SHA256_C) - if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 ) - { - handshake->tls_prf = tls_prf_sha256; - handshake->calc_verify = ssl_calc_verify_tls_sha256; - handshake->calc_finished = ssl_calc_finished_tls_sha256; - } - else -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - { - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - } - - return( 0 ); -} - -/* - * Compute master secret if needed - * - * Parameters: - * [in/out] handshake - * [in] resume, premaster, extended_ms, calc_verify, tls_prf - * (PSA-PSK) ciphersuite_info, psk_opaque - * [out] premaster (cleared) - * [out] master - * [in] ssl: optionally used for debugging, EMS and PSA-PSK - * debug: conf->f_dbg, conf->p_dbg - * EMS: passed to calc_verify (debug + (SSL3) session_negotiate) - * PSA-PSA: minor_ver, conf - */ -static int ssl_compute_master( mbedtls_ssl_handshake_params *handshake, - unsigned char *master, - const mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - /* cf. RFC 5246, Section 8.1: - * "The master secret is always exactly 48 bytes in length." */ - size_t const master_secret_len = 48; - -#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) - unsigned char session_hash[48]; -#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */ - - /* The label for the KDF used for key expansion. - * This is either "master secret" or "extended master secret" - * depending on whether the Extended Master Secret extension - * is used. */ - char const *lbl = "master secret"; - - /* The salt for the KDF used for key expansion. - * - If the Extended Master Secret extension is not used, - * this is ClientHello.Random + ServerHello.Random - * (see Sect. 8.1 in RFC 5246). - * - If the Extended Master Secret extension is used, - * this is the transcript of the handshake so far. - * (see Sect. 4 in RFC 7627). */ - unsigned char const *salt = handshake->randbytes; - size_t salt_len = 64; - -#if !defined(MBEDTLS_DEBUG_C) && \ - !defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) && \ - !(defined(MBEDTLS_USE_PSA_CRYPTO) && \ - defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)) - ssl = NULL; /* make sure we don't use it except for those cases */ - (void) ssl; -#endif - - if( handshake->resume != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) ); - return( 0 ); - } - -#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) - if( handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED ) - { - lbl = "extended master secret"; - salt = session_hash; - handshake->calc_verify( ssl, session_hash, &salt_len ); - - MBEDTLS_SSL_DEBUG_BUF( 3, "session hash for extended master secret", - session_hash, salt_len ); - } -#endif /* MBEDTLS_SSL_EXTENDED_MS_ENABLED */ - -#if defined(MBEDTLS_USE_PSA_CRYPTO) && \ - defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) - if( handshake->ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK && - ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 && - ssl_use_opaque_psk( ssl ) == 1 ) - { - /* Perform PSK-to-MS expansion in a single step. */ - psa_status_t status; - psa_algorithm_t alg; - psa_key_id_t psk; - psa_key_derivation_operation_t derivation = - PSA_KEY_DERIVATION_OPERATION_INIT; - mbedtls_md_type_t hash_alg = handshake->ciphersuite_info->mac; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "perform PSA-based PSK-to-MS expansion" ) ); - - psk = mbedtls_ssl_get_opaque_psk( ssl ); - - if( hash_alg == MBEDTLS_MD_SHA384 ) - alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_384); - else - alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_256); - - status = setup_psa_key_derivation( &derivation, psk, alg, - salt, salt_len, - (unsigned char const *) lbl, - (size_t) strlen( lbl ), - master_secret_len ); - if( status != PSA_SUCCESS ) - { - psa_key_derivation_abort( &derivation ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - status = psa_key_derivation_output_bytes( &derivation, - master, - master_secret_len ); - if( status != PSA_SUCCESS ) - { - psa_key_derivation_abort( &derivation ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - - status = psa_key_derivation_abort( &derivation ); - if( status != PSA_SUCCESS ) - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - else -#endif - { - ret = handshake->tls_prf( handshake->premaster, handshake->pmslen, - lbl, salt, salt_len, - master, - master_secret_len ); - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret ); - return( ret ); - } - - MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret", - handshake->premaster, - handshake->pmslen ); - - mbedtls_platform_zeroize( handshake->premaster, - sizeof(handshake->premaster) ); - } - - return( 0 ); -} - -int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - const mbedtls_ssl_ciphersuite_t * const ciphersuite_info = - ssl->handshake->ciphersuite_info; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> derive keys" ) ); - - /* Set PRF, calc_verify and calc_finished function pointers */ - ret = ssl_set_handshake_prfs( ssl->handshake, - ssl->minor_ver, - ciphersuite_info->mac ); - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "ssl_set_handshake_prfs", ret ); - return( ret ); - } - - /* Compute master secret if needed */ - ret = ssl_compute_master( ssl->handshake, - ssl->session_negotiate->master, - ssl ); - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "ssl_compute_master", ret ); - return( ret ); - } - - /* Swap the client and server random values: - * - MS derivation wanted client+server (RFC 5246 8.1) - * - key derivation wants server+client (RFC 5246 6.3) */ - { - unsigned char tmp[64]; - memcpy( tmp, ssl->handshake->randbytes, 64 ); - memcpy( ssl->handshake->randbytes, tmp + 32, 32 ); - memcpy( ssl->handshake->randbytes + 32, tmp, 32 ); - mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); - } - - /* Populate transform structure */ - ret = ssl_populate_transform( ssl->transform_negotiate, - ssl->session_negotiate->ciphersuite, - ssl->session_negotiate->master, -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - ssl->session_negotiate->encrypt_then_mac, -#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */ -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - ssl->session_negotiate->trunc_hmac, -#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */ -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - ssl->session_negotiate->compression, -#endif - ssl->handshake->tls_prf, - ssl->handshake->randbytes, - ssl->minor_ver, - ssl->conf->endpoint, - ssl ); - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "ssl_populate_transform", ret ); - return( ret ); - } - - /* We no longer need Server/ClientHello.random values */ - mbedtls_platform_zeroize( ssl->handshake->randbytes, - sizeof( ssl->handshake->randbytes ) ); - - /* Allocate compression buffer */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - if( ssl->session_negotiate->compression == MBEDTLS_SSL_COMPRESS_DEFLATE && - ssl->compress_buf == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) ); - ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_COMPRESS_BUFFER_LEN ); - if( ssl->compress_buf == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", - MBEDTLS_SSL_COMPRESS_BUFFER_LEN ) ); - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - } - } -#endif - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= derive keys" ) ); - - return( 0 ); -} - -#if defined(MBEDTLS_SSL_PROTO_SSL3) -void ssl_calc_verify_ssl( const mbedtls_ssl_context *ssl, - unsigned char *hash, - size_t *hlen ) -{ - mbedtls_md5_context md5; - mbedtls_sha1_context sha1; - unsigned char pad_1[48]; - unsigned char pad_2[48]; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) ); - - mbedtls_md5_init( &md5 ); - mbedtls_sha1_init( &sha1 ); - - mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 ); - mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 ); - - memset( pad_1, 0x36, 48 ); - memset( pad_2, 0x5C, 48 ); - - mbedtls_md5_update_ret( &md5, ssl->session_negotiate->master, 48 ); - mbedtls_md5_update_ret( &md5, pad_1, 48 ); - mbedtls_md5_finish_ret( &md5, hash ); - - mbedtls_md5_starts_ret( &md5 ); - mbedtls_md5_update_ret( &md5, ssl->session_negotiate->master, 48 ); - mbedtls_md5_update_ret( &md5, pad_2, 48 ); - mbedtls_md5_update_ret( &md5, hash, 16 ); - mbedtls_md5_finish_ret( &md5, hash ); - - mbedtls_sha1_update_ret( &sha1, ssl->session_negotiate->master, 48 ); - mbedtls_sha1_update_ret( &sha1, pad_1, 40 ); - mbedtls_sha1_finish_ret( &sha1, hash + 16 ); - - mbedtls_sha1_starts_ret( &sha1 ); - mbedtls_sha1_update_ret( &sha1, ssl->session_negotiate->master, 48 ); - mbedtls_sha1_update_ret( &sha1, pad_2, 40 ); - mbedtls_sha1_update_ret( &sha1, hash + 16, 20 ); - mbedtls_sha1_finish_ret( &sha1, hash + 16 ); - - *hlen = 36; - - MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) ); - - mbedtls_md5_free( &md5 ); - mbedtls_sha1_free( &sha1 ); - - return; -} -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) -void ssl_calc_verify_tls( const mbedtls_ssl_context *ssl, - unsigned char *hash, - size_t *hlen ) -{ - mbedtls_md5_context md5; - mbedtls_sha1_context sha1; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) ); - - mbedtls_md5_init( &md5 ); - mbedtls_sha1_init( &sha1 ); - - mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 ); - mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 ); - - mbedtls_md5_finish_ret( &md5, hash ); - mbedtls_sha1_finish_ret( &sha1, hash + 16 ); - - *hlen = 36; - - MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) ); - - mbedtls_md5_free( &md5 ); - mbedtls_sha1_free( &sha1 ); - - return; -} -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -void ssl_calc_verify_tls_sha256( const mbedtls_ssl_context *ssl, - unsigned char *hash, - size_t *hlen ) -{ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - size_t hash_size; - psa_status_t status; - psa_hash_operation_t sha256_psa = psa_hash_operation_init(); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> PSA calc verify sha256" ) ); - status = psa_hash_clone( &ssl->handshake->fin_sha256_psa, &sha256_psa ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) ); - return; - } - - status = psa_hash_finish( &sha256_psa, hash, 32, &hash_size ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) ); - return; - } - - *hlen = 32; - MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= PSA calc verify" ) ); -#else - mbedtls_sha256_context sha256; - - mbedtls_sha256_init( &sha256 ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) ); - - mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 ); - mbedtls_sha256_finish_ret( &sha256, hash ); - - *hlen = 32; - - MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) ); - - mbedtls_sha256_free( &sha256 ); -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - return; -} -#endif /* MBEDTLS_SHA256_C */ - -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -void ssl_calc_verify_tls_sha384( const mbedtls_ssl_context *ssl, - unsigned char *hash, - size_t *hlen ) -{ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - size_t hash_size; - psa_status_t status; - psa_hash_operation_t sha384_psa = psa_hash_operation_init(); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> PSA calc verify sha384" ) ); - status = psa_hash_clone( &ssl->handshake->fin_sha384_psa, &sha384_psa ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) ); - return; - } - - status = psa_hash_finish( &sha384_psa, hash, 48, &hash_size ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) ); - return; - } - - *hlen = 48; - MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= PSA calc verify" ) ); -#else - mbedtls_sha512_context sha512; - - mbedtls_sha512_init( &sha512 ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) ); - - mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 ); - mbedtls_sha512_finish_ret( &sha512, hash ); - - *hlen = 48; - - MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen ); - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) ); - - mbedtls_sha512_free( &sha512 ); -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - return; -} -#endif /* MBEDTLS_SHA512_C && !MBEDTLS_SHA512_NO_SHA384 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) -int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex ) -{ - unsigned char *p = ssl->handshake->premaster; - unsigned char *end = p + sizeof( ssl->handshake->premaster ); - const unsigned char *psk = NULL; - size_t psk_len = 0; - - if( mbedtls_ssl_get_psk( ssl, &psk, &psk_len ) - == MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED ) - { - /* - * This should never happen because the existence of a PSK is always - * checked before calling this function - */ - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - } - - /* - * PMS = struct { - * opaque other_secret<0..2^16-1>; - * opaque psk<0..2^16-1>; - * }; - * with "other_secret" depending on the particular key exchange - */ -#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) - if( key_ex == MBEDTLS_KEY_EXCHANGE_PSK ) - { - if( end - p < 2 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - *(p++) = (unsigned char)( psk_len >> 8 ); - *(p++) = (unsigned char)( psk_len ); - - if( end < p || (size_t)( end - p ) < psk_len ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - memset( p, 0, psk_len ); - p += psk_len; - } - else -#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */ -#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) - if( key_ex == MBEDTLS_KEY_EXCHANGE_RSA_PSK ) - { - /* - * other_secret already set by the ClientKeyExchange message, - * and is 48 bytes long - */ - if( end - p < 2 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - *p++ = 0; - *p++ = 48; - p += 48; - } - else -#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */ -#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) - if( key_ex == MBEDTLS_KEY_EXCHANGE_DHE_PSK ) - { - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - /* Write length only when we know the actual value */ - if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx, - p + 2, end - ( p + 2 ), &len, - ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret ); - return( ret ); - } - *(p++) = (unsigned char)( len >> 8 ); - *(p++) = (unsigned char)( len ); - p += len; - - MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K ); - } - else -#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */ -#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) - if( key_ex == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK ) - { - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t zlen; - - if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx, &zlen, - p + 2, end - ( p + 2 ), - ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret ); - return( ret ); - } - - *(p++) = (unsigned char)( zlen >> 8 ); - *(p++) = (unsigned char)( zlen ); - p += zlen; - - MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx, - MBEDTLS_DEBUG_ECDH_Z ); - } - else -#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */ - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - } - - /* opaque psk<0..2^16-1>; */ - if( end - p < 2 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - *(p++) = (unsigned char)( psk_len >> 8 ); - *(p++) = (unsigned char)( psk_len ); - - if( end < p || (size_t)( end - p ) < psk_len ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - memcpy( p, psk, psk_len ); - p += psk_len; - - ssl->handshake->pmslen = p - ssl->handshake->premaster; - - return( 0 ); -} -#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */ - -#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION) -static int ssl_write_hello_request( mbedtls_ssl_context *ssl ); - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -int mbedtls_ssl_resend_hello_request( mbedtls_ssl_context *ssl ) -{ - /* If renegotiation is not enforced, retransmit until we would reach max - * timeout if we were using the usual handshake doubling scheme */ - if( ssl->conf->renego_max_records < 0 ) - { - uint32_t ratio = ssl->conf->hs_timeout_max / ssl->conf->hs_timeout_min + 1; - unsigned char doublings = 1; - - while( ratio != 0 ) - { - ++doublings; - ratio >>= 1; - } - - if( ++ssl->renego_records_seen > doublings ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "no longer retransmitting hello request" ) ); - return( 0 ); - } - } - - return( ssl_write_hello_request( ssl ) ); -} -#endif -#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -static void ssl_clear_peer_cert( mbedtls_ssl_session *session ) -{ -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - if( session->peer_cert != NULL ) - { - mbedtls_x509_crt_free( session->peer_cert ); - mbedtls_free( session->peer_cert ); - session->peer_cert = NULL; - } -#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - if( session->peer_cert_digest != NULL ) - { - /* Zeroization is not necessary. */ - mbedtls_free( session->peer_cert_digest ); - session->peer_cert_digest = NULL; - session->peer_cert_digest_type = MBEDTLS_MD_NONE; - session->peer_cert_digest_len = 0; - } -#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -/* - * Handshake functions - */ -#if !defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -/* No certificate support -> dummy functions */ -int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl ) -{ - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) ); - - if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) ); - ssl->state++; - return( 0 ); - } - - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); -} - -int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl ) -{ - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) ); - - if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) ); - ssl->state++; - return( 0 ); - } - - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); -} - -#else /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ -/* Some certificate support -> implement write and parse */ - -int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; - size_t i, n; - const mbedtls_x509_crt *crt; - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) ); - - if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) ); - ssl->state++; - return( 0 ); - } - -#if defined(MBEDTLS_SSL_CLI_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - { - if( ssl->client_auth == 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) ); - ssl->state++; - return( 0 ); - } - -#if defined(MBEDTLS_SSL_PROTO_SSL3) - /* - * If using SSLv3 and got no cert, send an Alert message - * (otherwise an empty Certificate message will be sent). - */ - if( mbedtls_ssl_own_cert( ssl ) == NULL && - ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) - { - ssl->out_msglen = 2; - ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT; - ssl->out_msg[0] = MBEDTLS_SSL_ALERT_LEVEL_WARNING; - ssl->out_msg[1] = MBEDTLS_SSL_ALERT_MSG_NO_CERT; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) ); - goto write_msg; - } -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - } -#endif /* MBEDTLS_SSL_CLI_C */ -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - { - if( mbedtls_ssl_own_cert( ssl ) == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) ); - return( MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED ); - } - } -#endif - - MBEDTLS_SSL_DEBUG_CRT( 3, "own certificate", mbedtls_ssl_own_cert( ssl ) ); - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 6 length of all certs - * 7 . 9 length of cert. 1 - * 10 . n-1 peer certificate - * n . n+2 length of cert. 2 - * n+3 . ... upper level cert, etc. - */ - i = 7; - crt = mbedtls_ssl_own_cert( ssl ); - - while( crt != NULL ) - { - n = crt->raw.len; - if( n > MBEDTLS_SSL_OUT_CONTENT_LEN - 3 - i ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %" MBEDTLS_PRINTF_SIZET - " > %" MBEDTLS_PRINTF_SIZET, - i + 3 + n, (size_t) MBEDTLS_SSL_OUT_CONTENT_LEN ) ); - return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE ); - } - - ssl->out_msg[i ] = (unsigned char)( n >> 16 ); - ssl->out_msg[i + 1] = (unsigned char)( n >> 8 ); - ssl->out_msg[i + 2] = (unsigned char)( n ); - - i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n ); - i += n; crt = crt->next; - } - - ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 ); - ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 ); - ssl->out_msg[6] = (unsigned char)( ( i - 7 ) ); - - ssl->out_msglen = i; - ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE; - -#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_CLI_C) -write_msg: -#endif - - ssl->state++; - - if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret ); - return( ret ); - } - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate" ) ); - - return( ret ); -} - -#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C) - -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) -static int ssl_check_peer_crt_unchanged( mbedtls_ssl_context *ssl, - unsigned char *crt_buf, - size_t crt_buf_len ) -{ - mbedtls_x509_crt const * const peer_crt = ssl->session->peer_cert; - - if( peer_crt == NULL ) - return( -1 ); - - if( peer_crt->raw.len != crt_buf_len ) - return( -1 ); - - return( memcmp( peer_crt->raw.p, crt_buf, peer_crt->raw.len ) ); -} -#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -static int ssl_check_peer_crt_unchanged( mbedtls_ssl_context *ssl, - unsigned char *crt_buf, - size_t crt_buf_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - unsigned char const * const peer_cert_digest = - ssl->session->peer_cert_digest; - mbedtls_md_type_t const peer_cert_digest_type = - ssl->session->peer_cert_digest_type; - mbedtls_md_info_t const * const digest_info = - mbedtls_md_info_from_type( peer_cert_digest_type ); - unsigned char tmp_digest[MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN]; - size_t digest_len; - - if( peer_cert_digest == NULL || digest_info == NULL ) - return( -1 ); - - digest_len = mbedtls_md_get_size( digest_info ); - if( digest_len > MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN ) - return( -1 ); - - ret = mbedtls_md( digest_info, crt_buf, crt_buf_len, tmp_digest ); - if( ret != 0 ) - return( -1 ); - - return( memcmp( tmp_digest, peer_cert_digest, digest_len ) ); -} -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */ - -/* - * Once the certificate message is read, parse it into a cert chain and - * perform basic checks, but leave actual verification to the caller - */ -static int ssl_parse_certificate_chain( mbedtls_ssl_context *ssl, - mbedtls_x509_crt *chain ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; -#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C) - int crt_cnt=0; -#endif - size_t i, n; - uint8_t alert; - - if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE ); - return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE ); - } - - if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE || - ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - - i = mbedtls_ssl_hs_hdr_len( ssl ); - - /* - * Same message structure as in mbedtls_ssl_write_certificate() - */ - n = ( ssl->in_msg[i+1] << 8 ) | ssl->in_msg[i+2]; - - if( ssl->in_msg[i] != 0 || - ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - - /* Make &ssl->in_msg[i] point to the beginning of the CRT chain. */ - i += 3; - - /* Iterate through and parse the CRTs in the provided chain. */ - while( i < ssl->in_hslen ) - { - /* Check that there's room for the next CRT's length fields. */ - if ( i + 3 > ssl->in_hslen ) { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - /* In theory, the CRT can be up to 2**24 Bytes, but we don't support - * anything beyond 2**16 ~ 64K. */ - if( ssl->in_msg[i] != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - - /* Read length of the next CRT in the chain. */ - n = ( (unsigned int) ssl->in_msg[i + 1] << 8 ) - | (unsigned int) ssl->in_msg[i + 2]; - i += 3; - - if( n < 128 || i + n > ssl->in_hslen ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - - /* Check if we're handling the first CRT in the chain. */ -#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C) - if( crt_cnt++ == 0 && - ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT && - ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS ) - { - /* During client-side renegotiation, check that the server's - * end-CRTs hasn't changed compared to the initial handshake, - * mitigating the triple handshake attack. On success, reuse - * the original end-CRT instead of parsing it again. */ - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Check that peer CRT hasn't changed during renegotiation" ) ); - if( ssl_check_peer_crt_unchanged( ssl, - &ssl->in_msg[i], - n ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED ); - return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ); - } - - /* Now we can safely free the original chain. */ - ssl_clear_peer_cert( ssl->session ); - } -#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */ - - /* Parse the next certificate in the chain. */ -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - ret = mbedtls_x509_crt_parse_der( chain, ssl->in_msg + i, n ); -#else - /* If we don't need to store the CRT chain permanently, parse - * it in-place from the input buffer instead of making a copy. */ - ret = mbedtls_x509_crt_parse_der_nocopy( chain, ssl->in_msg + i, n ); -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - switch( ret ) - { - case 0: /*ok*/ - case MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND: - /* Ignore certificate with an unknown algorithm: maybe a - prior certificate was already trusted. */ - break; - - case MBEDTLS_ERR_X509_ALLOC_FAILED: - alert = MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR; - goto crt_parse_der_failed; - - case MBEDTLS_ERR_X509_UNKNOWN_VERSION: - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - goto crt_parse_der_failed; - - default: - alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT; - crt_parse_der_failed: - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, alert ); - MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret ); - return( ret ); - } - - i += n; - } - - MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", chain ); - return( 0 ); -} - -#if defined(MBEDTLS_SSL_SRV_C) -static int ssl_srv_check_client_no_crt_notification( mbedtls_ssl_context *ssl ) -{ - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - return( -1 ); - -#if defined(MBEDTLS_SSL_PROTO_SSL3) - /* - * Check if the client sent an empty certificate - */ - if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) - { - if( ssl->in_msglen == 2 && - ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT && - ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING && - ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) ); - return( 0 ); - } - - return( -1 ); - } -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( ssl->in_hslen == 3 + mbedtls_ssl_hs_hdr_len( ssl ) && - ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE && - ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE && - memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), "\0\0\0", 3 ) == 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) ); - return( 0 ); - } - - return( -1 ); -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \ - MBEDTLS_SSL_PROTO_TLS1_2 */ -} -#endif /* MBEDTLS_SSL_SRV_C */ - -/* Check if a certificate message is expected. - * Return either - * - SSL_CERTIFICATE_EXPECTED, or - * - SSL_CERTIFICATE_SKIP - * indicating whether a Certificate message is expected or not. - */ -#define SSL_CERTIFICATE_EXPECTED 0 -#define SSL_CERTIFICATE_SKIP 1 -static int ssl_parse_certificate_coordinate( mbedtls_ssl_context *ssl, - int authmode ) -{ - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - - if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) ) - return( SSL_CERTIFICATE_SKIP ); - -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - { - if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ) - return( SSL_CERTIFICATE_SKIP ); - - if( authmode == MBEDTLS_SSL_VERIFY_NONE ) - { - ssl->session_negotiate->verify_result = - MBEDTLS_X509_BADCERT_SKIP_VERIFY; - return( SSL_CERTIFICATE_SKIP ); - } - } -#else - ((void) authmode); -#endif /* MBEDTLS_SSL_SRV_C */ - - return( SSL_CERTIFICATE_EXPECTED ); -} - -static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl, - int authmode, - mbedtls_x509_crt *chain, - void *rs_ctx ) -{ - int ret = 0; - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - int have_ca_chain = 0; - - int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *); - void *p_vrfy; - - if( authmode == MBEDTLS_SSL_VERIFY_NONE ) - return( 0 ); - - if( ssl->f_vrfy != NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use context-specific verification callback" ) ); - f_vrfy = ssl->f_vrfy; - p_vrfy = ssl->p_vrfy; - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use configuration-specific verification callback" ) ); - f_vrfy = ssl->conf->f_vrfy; - p_vrfy = ssl->conf->p_vrfy; - } - - /* - * Main check: verify certificate - */ -#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK) - if( ssl->conf->f_ca_cb != NULL ) - { - ((void) rs_ctx); - have_ca_chain = 1; - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "use CA callback for X.509 CRT verification" ) ); - ret = mbedtls_x509_crt_verify_with_ca_cb( - chain, - ssl->conf->f_ca_cb, - ssl->conf->p_ca_cb, - ssl->conf->cert_profile, - ssl->hostname, - &ssl->session_negotiate->verify_result, - f_vrfy, p_vrfy ); - } - else -#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */ - { - mbedtls_x509_crt *ca_chain; - mbedtls_x509_crl *ca_crl; - -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - if( ssl->handshake->sni_ca_chain != NULL ) - { - ca_chain = ssl->handshake->sni_ca_chain; - ca_crl = ssl->handshake->sni_ca_crl; - } - else -#endif - { - ca_chain = ssl->conf->ca_chain; - ca_crl = ssl->conf->ca_crl; - } - - if( ca_chain != NULL ) - have_ca_chain = 1; - - ret = mbedtls_x509_crt_verify_restartable( - chain, - ca_chain, ca_crl, - ssl->conf->cert_profile, - ssl->hostname, - &ssl->session_negotiate->verify_result, - f_vrfy, p_vrfy, rs_ctx ); - } - - if( ret != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "x509_verify_cert", ret ); - } - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS ) - return( MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS ); -#endif - - /* - * Secondary checks: always done, but change 'ret' only if it was 0 - */ - -#if defined(MBEDTLS_ECP_C) - { - const mbedtls_pk_context *pk = &chain->pk; - - /* If certificate uses an EC key, make sure the curve is OK */ - if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) && - mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 ) - { - ssl->session_negotiate->verify_result |= MBEDTLS_X509_BADCERT_BAD_KEY; - - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) ); - if( ret == 0 ) - ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE; - } - } -#endif /* MBEDTLS_ECP_C */ - - if( mbedtls_ssl_check_cert_usage( chain, - ciphersuite_info, - ! ssl->conf->endpoint, - &ssl->session_negotiate->verify_result ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) ); - if( ret == 0 ) - ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE; - } - - /* mbedtls_x509_crt_verify_with_profile is supposed to report a - * verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED, - * with details encoded in the verification flags. All other kinds - * of error codes, including those from the user provided f_vrfy - * functions, are treated as fatal and lead to a failure of - * ssl_parse_certificate even if verification was optional. */ - if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL && - ( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || - ret == MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ) ) - { - ret = 0; - } - - if( have_ca_chain == 0 && authmode == MBEDTLS_SSL_VERIFY_REQUIRED ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) ); - ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED; - } - - if( ret != 0 ) - { - uint8_t alert; - - /* The certificate may have been rejected for several reasons. - Pick one and send the corresponding alert. Which alert to send - may be a subject of debate in some cases. */ - if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER ) - alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH ) - alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE ) - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE ) - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE ) - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK ) - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY ) - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED ) - alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED ) - alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED; - else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED ) - alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA; - else - alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN; - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - alert ); - } - -#if defined(MBEDTLS_DEBUG_C) - if( ssl->session_negotiate->verify_result != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %08x", - (unsigned int) ssl->session_negotiate->verify_result ) ); - } - else - { - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) ); - } -#endif /* MBEDTLS_DEBUG_C */ - - return( ret ); -} - -#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) -static int ssl_remember_peer_crt_digest( mbedtls_ssl_context *ssl, - unsigned char *start, size_t len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - /* Remember digest of the peer's end-CRT. */ - ssl->session_negotiate->peer_cert_digest = - mbedtls_calloc( 1, MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN ); - if( ssl->session_negotiate->peer_cert_digest == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", - MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR ); - - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - } - - ret = mbedtls_md( mbedtls_md_info_from_type( - MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE ), - start, len, - ssl->session_negotiate->peer_cert_digest ); - - ssl->session_negotiate->peer_cert_digest_type = - MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE; - ssl->session_negotiate->peer_cert_digest_len = - MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN; - - return( ret ); -} - -static int ssl_remember_peer_pubkey( mbedtls_ssl_context *ssl, - unsigned char *start, size_t len ) -{ - unsigned char *end = start + len; - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - /* Make a copy of the peer's raw public key. */ - mbedtls_pk_init( &ssl->handshake->peer_pubkey ); - ret = mbedtls_pk_parse_subpubkey( &start, end, - &ssl->handshake->peer_pubkey ); - if( ret != 0 ) - { - /* We should have parsed the public key before. */ - return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); - } - - return( 0 ); -} -#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - -int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl ) -{ - int ret = 0; - int crt_expected; -#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET - ? ssl->handshake->sni_authmode - : ssl->conf->authmode; -#else - const int authmode = ssl->conf->authmode; -#endif - void *rs_ctx = NULL; - mbedtls_x509_crt *chain = NULL; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) ); - - crt_expected = ssl_parse_certificate_coordinate( ssl, authmode ); - if( crt_expected == SSL_CERTIFICATE_SKIP ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) ); - goto exit; - } - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - if( ssl->handshake->ecrs_enabled && - ssl->handshake->ecrs_state == ssl_ecrs_crt_verify ) - { - chain = ssl->handshake->ecrs_peer_cert; - ssl->handshake->ecrs_peer_cert = NULL; - goto crt_verify; - } -#endif - - if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 ) - { - /* mbedtls_ssl_read_record may have sent an alert already. We - let it decide whether to alert. */ - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret ); - goto exit; - } - -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl_srv_check_client_no_crt_notification( ssl ) == 0 ) - { - ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING; - - if( authmode != MBEDTLS_SSL_VERIFY_OPTIONAL ) - ret = MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE; - - goto exit; - } -#endif /* MBEDTLS_SSL_SRV_C */ - - /* Clear existing peer CRT structure in case we tried to - * reuse a session but it failed, and allocate a new one. */ - ssl_clear_peer_cert( ssl->session_negotiate ); - - chain = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) ); - if( chain == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%" MBEDTLS_PRINTF_SIZET " bytes) failed", - sizeof( mbedtls_x509_crt ) ) ); - mbedtls_ssl_send_alert_message( ssl, - MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR ); - - ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; - goto exit; - } - mbedtls_x509_crt_init( chain ); - - ret = ssl_parse_certificate_chain( ssl, chain ); - if( ret != 0 ) - goto exit; - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - if( ssl->handshake->ecrs_enabled) - ssl->handshake->ecrs_state = ssl_ecrs_crt_verify; - -crt_verify: - if( ssl->handshake->ecrs_enabled) - rs_ctx = &ssl->handshake->ecrs_ctx; -#endif - - ret = ssl_parse_certificate_verify( ssl, authmode, - chain, rs_ctx ); - if( ret != 0 ) - goto exit; - -#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - { - unsigned char *crt_start, *pk_start; - size_t crt_len, pk_len; - - /* We parse the CRT chain without copying, so - * these pointers point into the input buffer, - * and are hence still valid after freeing the - * CRT chain. */ - - crt_start = chain->raw.p; - crt_len = chain->raw.len; - - pk_start = chain->pk_raw.p; - pk_len = chain->pk_raw.len; - - /* Free the CRT structures before computing - * digest and copying the peer's public key. */ - mbedtls_x509_crt_free( chain ); - mbedtls_free( chain ); - chain = NULL; - - ret = ssl_remember_peer_crt_digest( ssl, crt_start, crt_len ); - if( ret != 0 ) - goto exit; - - ret = ssl_remember_peer_pubkey( ssl, pk_start, pk_len ); - if( ret != 0 ) - goto exit; - } -#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - /* Pass ownership to session structure. */ - ssl->session_negotiate->peer_cert = chain; - chain = NULL; -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) ); - -exit: - - if( ret == 0 ) - ssl->state++; - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - if( ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS ) - { - ssl->handshake->ecrs_peer_cert = chain; - chain = NULL; - } -#endif - - if( chain != NULL ) - { - mbedtls_x509_crt_free( chain ); - mbedtls_free( chain ); - } - - return( ret ); -} -#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl, - const mbedtls_ssl_ciphersuite_t *ciphersuite_info ) -{ - ((void) ciphersuite_info); - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 ) - ssl->handshake->update_checksum = ssl_update_checksum_md5sha1; - else -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 ) - ssl->handshake->update_checksum = ssl_update_checksum_sha384; - else -#endif -#if defined(MBEDTLS_SHA256_C) - if( ciphersuite_info->mac != MBEDTLS_MD_SHA384 ) - ssl->handshake->update_checksum = ssl_update_checksum_sha256; - else -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) ); - return; - } -} - -void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl ) -{ -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - mbedtls_md5_starts_ret( &ssl->handshake->fin_md5 ); - mbedtls_sha1_starts_ret( &ssl->handshake->fin_sha1 ); -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_abort( &ssl->handshake->fin_sha256_psa ); - psa_hash_setup( &ssl->handshake->fin_sha256_psa, PSA_ALG_SHA_256 ); -#else - mbedtls_sha256_starts_ret( &ssl->handshake->fin_sha256, 0 ); -#endif -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_abort( &ssl->handshake->fin_sha384_psa ); - psa_hash_setup( &ssl->handshake->fin_sha384_psa, PSA_ALG_SHA_384 ); -#else - mbedtls_sha512_starts_ret( &ssl->handshake->fin_sha512, 1 ); -#endif -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ -} - -static void ssl_update_checksum_start( mbedtls_ssl_context *ssl, - const unsigned char *buf, size_t len ) -{ -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - mbedtls_md5_update_ret( &ssl->handshake->fin_md5 , buf, len ); - mbedtls_sha1_update_ret( &ssl->handshake->fin_sha1, buf, len ); -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_update( &ssl->handshake->fin_sha256_psa, buf, len ); -#else - mbedtls_sha256_update_ret( &ssl->handshake->fin_sha256, buf, len ); -#endif -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len ); -#else - mbedtls_sha512_update_ret( &ssl->handshake->fin_sha512, buf, len ); -#endif -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ -} - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) -static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *ssl, - const unsigned char *buf, size_t len ) -{ - mbedtls_md5_update_ret( &ssl->handshake->fin_md5 , buf, len ); - mbedtls_sha1_update_ret( &ssl->handshake->fin_sha1, buf, len ); -} -#endif - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -static void ssl_update_checksum_sha256( mbedtls_ssl_context *ssl, - const unsigned char *buf, size_t len ) -{ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_update( &ssl->handshake->fin_sha256_psa, buf, len ); -#else - mbedtls_sha256_update_ret( &ssl->handshake->fin_sha256, buf, len ); -#endif -} -#endif - -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -static void ssl_update_checksum_sha384( mbedtls_ssl_context *ssl, - const unsigned char *buf, size_t len ) -{ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len ); -#else - mbedtls_sha512_update_ret( &ssl->handshake->fin_sha512, buf, len ); -#endif -} -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -#if defined(MBEDTLS_SSL_PROTO_SSL3) -static void ssl_calc_finished_ssl( - mbedtls_ssl_context *ssl, unsigned char *buf, int from ) -{ - const char *sender; - mbedtls_md5_context md5; - mbedtls_sha1_context sha1; - - unsigned char padbuf[48]; - unsigned char md5sum[16]; - unsigned char sha1sum[20]; - - mbedtls_ssl_session *session = ssl->session_negotiate; - if( !session ) - session = ssl->session; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) ); - - mbedtls_md5_init( &md5 ); - mbedtls_sha1_init( &sha1 ); - - mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 ); - mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 ); - - /* - * SSLv3: - * hash = - * MD5( master + pad2 + - * MD5( handshake + sender + master + pad1 ) ) - * + SHA1( master + pad2 + - * SHA1( handshake + sender + master + pad1 ) ) - */ - -#if !defined(MBEDTLS_MD5_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *) - md5.state, sizeof( md5.state ) ); -#endif - -#if !defined(MBEDTLS_SHA1_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *) - sha1.state, sizeof( sha1.state ) ); -#endif - - sender = ( from == MBEDTLS_SSL_IS_CLIENT ) ? "CLNT" - : "SRVR"; - - memset( padbuf, 0x36, 48 ); - - mbedtls_md5_update_ret( &md5, (const unsigned char *) sender, 4 ); - mbedtls_md5_update_ret( &md5, session->master, 48 ); - mbedtls_md5_update_ret( &md5, padbuf, 48 ); - mbedtls_md5_finish_ret( &md5, md5sum ); - - mbedtls_sha1_update_ret( &sha1, (const unsigned char *) sender, 4 ); - mbedtls_sha1_update_ret( &sha1, session->master, 48 ); - mbedtls_sha1_update_ret( &sha1, padbuf, 40 ); - mbedtls_sha1_finish_ret( &sha1, sha1sum ); - - memset( padbuf, 0x5C, 48 ); - - mbedtls_md5_starts_ret( &md5 ); - mbedtls_md5_update_ret( &md5, session->master, 48 ); - mbedtls_md5_update_ret( &md5, padbuf, 48 ); - mbedtls_md5_update_ret( &md5, md5sum, 16 ); - mbedtls_md5_finish_ret( &md5, buf ); - - mbedtls_sha1_starts_ret( &sha1 ); - mbedtls_sha1_update_ret( &sha1, session->master, 48 ); - mbedtls_sha1_update_ret( &sha1, padbuf , 40 ); - mbedtls_sha1_update_ret( &sha1, sha1sum, 20 ); - mbedtls_sha1_finish_ret( &sha1, buf + 16 ); - - MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 ); - - mbedtls_md5_free( &md5 ); - mbedtls_sha1_free( &sha1 ); - - mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) ); - mbedtls_platform_zeroize( md5sum, sizeof( md5sum ) ); - mbedtls_platform_zeroize( sha1sum, sizeof( sha1sum ) ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) ); -} -#endif /* MBEDTLS_SSL_PROTO_SSL3 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) -static void ssl_calc_finished_tls( - mbedtls_ssl_context *ssl, unsigned char *buf, int from ) -{ - int len = 12; - const char *sender; - mbedtls_md5_context md5; - mbedtls_sha1_context sha1; - unsigned char padbuf[36]; - - mbedtls_ssl_session *session = ssl->session_negotiate; - if( !session ) - session = ssl->session; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) ); - - mbedtls_md5_init( &md5 ); - mbedtls_sha1_init( &sha1 ); - - mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 ); - mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 ); - - /* - * TLSv1: - * hash = PRF( master, finished_label, - * MD5( handshake ) + SHA1( handshake ) )[0..11] - */ - -#if !defined(MBEDTLS_MD5_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *) - md5.state, sizeof( md5.state ) ); -#endif - -#if !defined(MBEDTLS_SHA1_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *) - sha1.state, sizeof( sha1.state ) ); -#endif - - sender = ( from == MBEDTLS_SSL_IS_CLIENT ) - ? "client finished" - : "server finished"; - - mbedtls_md5_finish_ret( &md5, padbuf ); - mbedtls_sha1_finish_ret( &sha1, padbuf + 16 ); - - ssl->handshake->tls_prf( session->master, 48, sender, - padbuf, 36, buf, len ); - - MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len ); - - mbedtls_md5_free( &md5 ); - mbedtls_sha1_free( &sha1 ); - - mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) ); -} -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -static void ssl_calc_finished_tls_sha256( - mbedtls_ssl_context *ssl, unsigned char *buf, int from ) -{ - int len = 12; - const char *sender; - unsigned char padbuf[32]; -#if defined(MBEDTLS_USE_PSA_CRYPTO) - size_t hash_size; - psa_hash_operation_t sha256_psa = PSA_HASH_OPERATION_INIT; - psa_status_t status; -#else - mbedtls_sha256_context sha256; -#endif - - mbedtls_ssl_session *session = ssl->session_negotiate; - if( !session ) - session = ssl->session; - - sender = ( from == MBEDTLS_SSL_IS_CLIENT ) - ? "client finished" - : "server finished"; - -#if defined(MBEDTLS_USE_PSA_CRYPTO) - sha256_psa = psa_hash_operation_init(); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc PSA finished tls sha256" ) ); - - status = psa_hash_clone( &ssl->handshake->fin_sha256_psa, &sha256_psa ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) ); - return; - } - - status = psa_hash_finish( &sha256_psa, padbuf, sizeof( padbuf ), &hash_size ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) ); - return; - } - MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated padbuf", padbuf, 32 ); -#else - - mbedtls_sha256_init( &sha256 ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) ); - - mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 ); - - /* - * TLSv1.2: - * hash = PRF( master, finished_label, - * Hash( handshake ) )[0.11] - */ - -#if !defined(MBEDTLS_SHA256_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *) - sha256.state, sizeof( sha256.state ) ); -#endif - - mbedtls_sha256_finish_ret( &sha256, padbuf ); - mbedtls_sha256_free( &sha256 ); -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - - ssl->handshake->tls_prf( session->master, 48, sender, - padbuf, 32, buf, len ); - - MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len ); - - mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) ); -} -#endif /* MBEDTLS_SHA256_C */ - -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - -static void ssl_calc_finished_tls_sha384( - mbedtls_ssl_context *ssl, unsigned char *buf, int from ) -{ - int len = 12; - const char *sender; - unsigned char padbuf[48]; -#if defined(MBEDTLS_USE_PSA_CRYPTO) - size_t hash_size; - psa_hash_operation_t sha384_psa = PSA_HASH_OPERATION_INIT; - psa_status_t status; -#else - mbedtls_sha512_context sha512; -#endif - - mbedtls_ssl_session *session = ssl->session_negotiate; - if( !session ) - session = ssl->session; - - sender = ( from == MBEDTLS_SSL_IS_CLIENT ) - ? "client finished" - : "server finished"; - -#if defined(MBEDTLS_USE_PSA_CRYPTO) - sha384_psa = psa_hash_operation_init(); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc PSA finished tls sha384" ) ); - - status = psa_hash_clone( &ssl->handshake->fin_sha384_psa, &sha384_psa ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) ); - return; - } - - status = psa_hash_finish( &sha384_psa, padbuf, sizeof( padbuf ), &hash_size ); - if( status != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) ); - return; - } - MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated padbuf", padbuf, 48 ); -#else - mbedtls_sha512_init( &sha512 ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) ); - - mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 ); - - /* - * TLSv1.2: - * hash = PRF( master, finished_label, - * Hash( handshake ) )[0.11] - */ - -#if !defined(MBEDTLS_SHA512_ALT) - MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha512 state", (unsigned char *) - sha512.state, sizeof( sha512.state ) ); -#endif - /* mbedtls_sha512_finish_ret's output parameter is declared as a - * 64-byte buffer, but sice we're using SHA-384, we know that the - * output fits in 48 bytes. This is correct C, but GCC 11.1 warns - * about it. - */ -#if defined(__GNUC__) && __GNUC__ >= 11 -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wstringop-overflow" -#endif - mbedtls_sha512_finish_ret( &sha512, padbuf ); -#if defined(__GNUC__) && __GNUC__ >= 11 -#pragma GCC diagnostic pop -#endif - - mbedtls_sha512_free( &sha512 ); -#endif - - ssl->handshake->tls_prf( session->master, 48, sender, - padbuf, 48, buf, len ); - - MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len ); - - mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) ); - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) ); -} -#endif /* MBEDTLS_SHA512_C && !MBEDTLS_SHA512_NO_SHA384 */ -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -void mbedtls_ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl ) -{ - MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup: final free" ) ); - - /* - * Free our handshake params - */ - mbedtls_ssl_handshake_free( ssl ); - mbedtls_free( ssl->handshake ); - ssl->handshake = NULL; - - /* - * Free the previous transform and swith in the current one - */ - if( ssl->transform ) - { - mbedtls_ssl_transform_free( ssl->transform ); - mbedtls_free( ssl->transform ); - } - ssl->transform = ssl->transform_negotiate; - ssl->transform_negotiate = NULL; - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup: final free" ) ); -} - -void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl ) -{ - int resume = ssl->handshake->resume; - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) ); - -#if defined(MBEDTLS_SSL_RENEGOTIATION) - if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS ) - { - ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_DONE; - ssl->renego_records_seen = 0; - } -#endif - - /* - * Free the previous session and switch in the current one - */ - if( ssl->session ) - { -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - /* RFC 7366 3.1: keep the EtM state */ - ssl->session_negotiate->encrypt_then_mac = - ssl->session->encrypt_then_mac; -#endif - - mbedtls_ssl_session_free( ssl->session ); - mbedtls_free( ssl->session ); - } - ssl->session = ssl->session_negotiate; - ssl->session_negotiate = NULL; - - /* - * Add cache entry - */ - if( ssl->conf->f_set_cache != NULL && - ssl->session->id_len != 0 && - resume == 0 ) - { - if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 ) - MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) ); - } - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM && - ssl->handshake->flight != NULL ) - { - /* Cancel handshake timer */ - mbedtls_ssl_set_timer( ssl, 0 ); - - /* Keep last flight around in case we need to resend it: - * we need the handshake and transform structures for that */ - MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip freeing handshake and transform" ) ); - } - else -#endif - mbedtls_ssl_handshake_wrapup_free_hs_transform( ssl ); - - ssl->state++; - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) ); -} - -int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl ) -{ - int ret, hash_len; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write finished" ) ); - - mbedtls_ssl_update_out_pointers( ssl, ssl->transform_negotiate ); - - ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->conf->endpoint ); - - /* - * RFC 5246 7.4.9 (Page 63) says 12 is the default length and ciphersuites - * may define some other value. Currently (early 2016), no defined - * ciphersuite does this (and this is unlikely to change as activity has - * moved to TLS 1.3 now) so we can keep the hardcoded 12 here. - */ - hash_len = ( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) ? 36 : 12; - -#if defined(MBEDTLS_SSL_RENEGOTIATION) - ssl->verify_data_len = hash_len; - memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len ); -#endif - - ssl->out_msglen = 4 + hash_len; - ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = MBEDTLS_SSL_HS_FINISHED; - - /* - * In case of session resuming, invert the client and server - * ChangeCipherSpec messages order. - */ - if( ssl->handshake->resume != 0 ) - { -#if defined(MBEDTLS_SSL_CLI_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP; -#endif -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC; -#endif - } - else - ssl->state++; - - /* - * Switch to our negotiated transform and session parameters for outbound - * data. - */ - MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) ); - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - { - unsigned char i; - - /* Remember current epoch settings for resending */ - ssl->handshake->alt_transform_out = ssl->transform_out; - memcpy( ssl->handshake->alt_out_ctr, ssl->cur_out_ctr, 8 ); - - /* Set sequence_number to zero */ - memset( ssl->cur_out_ctr + 2, 0, 6 ); - - /* Increment epoch */ - for( i = 2; i > 0; i-- ) - if( ++ssl->cur_out_ctr[i - 1] != 0 ) - break; - - /* The loop goes to its end iff the counter is wrapping */ - if( i == 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) ); - return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING ); - } - } - else -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - memset( ssl->cur_out_ctr, 0, 8 ); - - ssl->transform_out = ssl->transform_negotiate; - ssl->session_out = ssl->session_negotiate; - -#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL) - if( mbedtls_ssl_hw_record_activate != NULL ) - { - if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - } -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - mbedtls_ssl_send_flight_completed( ssl ); -#endif - - if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret ); - return( ret ); - } - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM && - ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret ); - return( ret ); - } -#endif - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write finished" ) ); - - return( 0 ); -} - -#if defined(MBEDTLS_SSL_PROTO_SSL3) -#define SSL_MAX_HASH_LEN 36 -#else -#define SSL_MAX_HASH_LEN 12 -#endif - -int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - unsigned int hash_len; - unsigned char buf[SSL_MAX_HASH_LEN]; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse finished" ) ); - - ssl->handshake->calc_finished( ssl, buf, ssl->conf->endpoint ^ 1 ); - - if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret ); - return( ret ); - } - - if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE ); - return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE ); - } - - /* There is currently no ciphersuite using another length with TLS 1.2 */ -#if defined(MBEDTLS_SSL_PROTO_SSL3) - if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) - hash_len = 36; - else -#endif - hash_len = 12; - - if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED || - ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED ); - } - - if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), - buf, hash_len ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) ); - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR ); - return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED ); - } - -#if defined(MBEDTLS_SSL_RENEGOTIATION) - ssl->verify_data_len = hash_len; - memcpy( ssl->peer_verify_data, buf, hash_len ); -#endif - - if( ssl->handshake->resume != 0 ) - { -#if defined(MBEDTLS_SSL_CLI_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC; -#endif -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP; -#endif - } - else - ssl->state++; - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - mbedtls_ssl_recv_flight_completed( ssl ); -#endif - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse finished" ) ); - - return( 0 ); -} - -static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake ) -{ - memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) ); - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - mbedtls_md5_init( &handshake->fin_md5 ); - mbedtls_sha1_init( &handshake->fin_sha1 ); - mbedtls_md5_starts_ret( &handshake->fin_md5 ); - mbedtls_sha1_starts_ret( &handshake->fin_sha1 ); -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - handshake->fin_sha256_psa = psa_hash_operation_init(); - psa_hash_setup( &handshake->fin_sha256_psa, PSA_ALG_SHA_256 ); -#else - mbedtls_sha256_init( &handshake->fin_sha256 ); - mbedtls_sha256_starts_ret( &handshake->fin_sha256, 0 ); -#endif -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - handshake->fin_sha384_psa = psa_hash_operation_init(); - psa_hash_setup( &handshake->fin_sha384_psa, PSA_ALG_SHA_384 ); -#else - mbedtls_sha512_init( &handshake->fin_sha512 ); - mbedtls_sha512_starts_ret( &handshake->fin_sha512, 1 ); -#endif -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - - handshake->update_checksum = ssl_update_checksum_start; - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - mbedtls_ssl_sig_hash_set_init( &handshake->hash_algs ); -#endif - -#if defined(MBEDTLS_DHM_C) - mbedtls_dhm_init( &handshake->dhm_ctx ); -#endif -#if defined(MBEDTLS_ECDH_C) - mbedtls_ecdh_init( &handshake->ecdh_ctx ); -#endif -#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) - mbedtls_ecjpake_init( &handshake->ecjpake_ctx ); -#if defined(MBEDTLS_SSL_CLI_C) - handshake->ecjpake_cache = NULL; - handshake->ecjpake_cache_len = 0; -#endif -#endif - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - mbedtls_x509_crt_restart_init( &handshake->ecrs_ctx ); -#endif - -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - handshake->sni_authmode = MBEDTLS_SSL_VERIFY_UNSET; -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) && \ - !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - mbedtls_pk_init( &handshake->peer_pubkey ); -#endif -} - -void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform ) -{ - memset( transform, 0, sizeof(mbedtls_ssl_transform) ); - - mbedtls_cipher_init( &transform->cipher_ctx_enc ); - mbedtls_cipher_init( &transform->cipher_ctx_dec ); - -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) - mbedtls_md_init( &transform->md_ctx_enc ); - mbedtls_md_init( &transform->md_ctx_dec ); -#endif -} - -void mbedtls_ssl_session_init( mbedtls_ssl_session *session ) -{ - memset( session, 0, sizeof(mbedtls_ssl_session) ); -} - -static int ssl_handshake_init( mbedtls_ssl_context *ssl ) -{ - /* Clear old handshake information if present */ - if( ssl->transform_negotiate ) - mbedtls_ssl_transform_free( ssl->transform_negotiate ); - if( ssl->session_negotiate ) - mbedtls_ssl_session_free( ssl->session_negotiate ); - if( ssl->handshake ) - mbedtls_ssl_handshake_free( ssl ); - - /* - * Either the pointers are now NULL or cleared properly and can be freed. - * Now allocate missing structures. - */ - if( ssl->transform_negotiate == NULL ) - { - ssl->transform_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_transform) ); - } - - if( ssl->session_negotiate == NULL ) - { - ssl->session_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_session) ); - } - - if( ssl->handshake == NULL ) - { - ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) ); - } -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - /* If the buffers are too small - reallocate */ - - handle_buffer_resizing( ssl, 0, MBEDTLS_SSL_IN_BUFFER_LEN, - MBEDTLS_SSL_OUT_BUFFER_LEN ); -#endif - - /* All pointers should exist and can be directly freed without issue */ - if( ssl->handshake == NULL || - ssl->transform_negotiate == NULL || - ssl->session_negotiate == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc() of ssl sub-contexts failed" ) ); - - mbedtls_free( ssl->handshake ); - mbedtls_free( ssl->transform_negotiate ); - mbedtls_free( ssl->session_negotiate ); - - ssl->handshake = NULL; - ssl->transform_negotiate = NULL; - ssl->session_negotiate = NULL; - - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - } - - /* Initialize structures */ - mbedtls_ssl_session_init( ssl->session_negotiate ); - mbedtls_ssl_transform_init( ssl->transform_negotiate ); - ssl_handshake_params_init( ssl->handshake ); - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - { - ssl->handshake->alt_transform_out = ssl->transform_out; - - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING; - else - ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING; - - mbedtls_ssl_set_timer( ssl, 0 ); - } -#endif - - return( 0 ); -} - -#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C) -/* Dummy cookie callbacks for defaults */ -static int ssl_cookie_write_dummy( void *ctx, - unsigned char **p, unsigned char *end, - const unsigned char *cli_id, size_t cli_id_len ) -{ - ((void) ctx); - ((void) p); - ((void) end); - ((void) cli_id); - ((void) cli_id_len); - - return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE ); -} - -static int ssl_cookie_check_dummy( void *ctx, - const unsigned char *cookie, size_t cookie_len, - const unsigned char *cli_id, size_t cli_id_len ) -{ - ((void) ctx); - ((void) cookie); - ((void) cookie_len); - ((void) cli_id); - ((void) cli_id_len); - - return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE ); -} -#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */ - -/* - * Initialize an SSL context - */ -void mbedtls_ssl_init( mbedtls_ssl_context *ssl ) -{ - memset( ssl, 0, sizeof( mbedtls_ssl_context ) ); -} - -/* - * Setup an SSL context - */ - -int mbedtls_ssl_setup( mbedtls_ssl_context *ssl, - const mbedtls_ssl_config *conf ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN; - size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN; - - ssl->conf = conf; - - /* - * Prepare base structures - */ - - /* Set to NULL in case of an error condition */ - ssl->out_buf = NULL; - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - ssl->in_buf_len = in_buf_len; -#endif - ssl->in_buf = mbedtls_calloc( 1, in_buf_len ); - if( ssl->in_buf == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%" MBEDTLS_PRINTF_SIZET " bytes) failed", in_buf_len ) ); - ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; - goto error; - } - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - ssl->out_buf_len = out_buf_len; -#endif - ssl->out_buf = mbedtls_calloc( 1, out_buf_len ); - if( ssl->out_buf == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%" MBEDTLS_PRINTF_SIZET " bytes) failed", out_buf_len ) ); - ret = MBEDTLS_ERR_SSL_ALLOC_FAILED; - goto error; - } - - mbedtls_ssl_reset_in_out_pointers( ssl ); - -#if defined(MBEDTLS_SSL_DTLS_SRTP) - memset( &ssl->dtls_srtp_info, 0, sizeof(ssl->dtls_srtp_info) ); -#endif - - if( ( ret = ssl_handshake_init( ssl ) ) != 0 ) - goto error; - - return( 0 ); - -error: - mbedtls_free( ssl->in_buf ); - mbedtls_free( ssl->out_buf ); - - ssl->conf = NULL; - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - ssl->in_buf_len = 0; - ssl->out_buf_len = 0; -#endif - ssl->in_buf = NULL; - ssl->out_buf = NULL; - - ssl->in_hdr = NULL; - ssl->in_ctr = NULL; - ssl->in_len = NULL; - ssl->in_iv = NULL; - ssl->in_msg = NULL; - - ssl->out_hdr = NULL; - ssl->out_ctr = NULL; - ssl->out_len = NULL; - ssl->out_iv = NULL; - ssl->out_msg = NULL; - - return( ret ); -} - -/* - * Reset an initialized and used SSL context for re-use while retaining - * all application-set variables, function pointers and data. - * - * If partial is non-zero, keep data in the input buffer and client ID. - * (Use when a DTLS client reconnects from the same port.) - */ -int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - size_t in_buf_len = ssl->in_buf_len; - size_t out_buf_len = ssl->out_buf_len; -#else - size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN; - size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN; -#endif - -#if !defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) || \ - !defined(MBEDTLS_SSL_SRV_C) - ((void) partial); -#endif - - ssl->state = MBEDTLS_SSL_HELLO_REQUEST; - - /* Cancel any possibly running timer */ - mbedtls_ssl_set_timer( ssl, 0 ); - -#if defined(MBEDTLS_SSL_RENEGOTIATION) - ssl->renego_status = MBEDTLS_SSL_INITIAL_HANDSHAKE; - ssl->renego_records_seen = 0; - - ssl->verify_data_len = 0; - memset( ssl->own_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN ); - memset( ssl->peer_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN ); -#endif - ssl->secure_renegotiation = MBEDTLS_SSL_LEGACY_RENEGOTIATION; - - ssl->in_offt = NULL; - mbedtls_ssl_reset_in_out_pointers( ssl ); - - ssl->in_msgtype = 0; - ssl->in_msglen = 0; -#if defined(MBEDTLS_SSL_PROTO_DTLS) - ssl->next_record_offset = 0; - ssl->in_epoch = 0; -#endif -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) - mbedtls_ssl_dtls_replay_reset( ssl ); -#endif - - ssl->in_hslen = 0; - ssl->nb_zero = 0; - - ssl->keep_current_message = 0; - - ssl->out_msgtype = 0; - ssl->out_msglen = 0; - ssl->out_left = 0; -#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING) - if( ssl->split_done != MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED ) - ssl->split_done = 0; -#endif - - memset( ssl->cur_out_ctr, 0, sizeof( ssl->cur_out_ctr ) ); - - ssl->transform_in = NULL; - ssl->transform_out = NULL; - - ssl->session_in = NULL; - ssl->session_out = NULL; - - memset( ssl->out_buf, 0, out_buf_len ); - -#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C) - if( partial == 0 ) -#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */ - { - ssl->in_left = 0; - memset( ssl->in_buf, 0, in_buf_len ); - } - -#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL) - if( mbedtls_ssl_hw_record_reset != NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_reset()" ) ); - if( ( ret = mbedtls_ssl_hw_record_reset( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_reset", ret ); - return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED ); - } - } -#endif - - if( ssl->transform ) - { - mbedtls_ssl_transform_free( ssl->transform ); - mbedtls_free( ssl->transform ); - ssl->transform = NULL; - } - - if( ssl->session ) - { - mbedtls_ssl_session_free( ssl->session ); - mbedtls_free( ssl->session ); - ssl->session = NULL; - } - -#if defined(MBEDTLS_SSL_ALPN) - ssl->alpn_chosen = NULL; -#endif - -#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C) -#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) - if( partial == 0 ) -#endif - { - mbedtls_free( ssl->cli_id ); - ssl->cli_id = NULL; - ssl->cli_id_len = 0; - } -#endif - - if( ( ret = ssl_handshake_init( ssl ) ) != 0 ) - return( ret ); - - return( 0 ); -} - -/* - * Reset an initialized and used SSL context for re-use while retaining - * all application-set variables, function pointers and data. - */ -int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl ) -{ - return( mbedtls_ssl_session_reset_int( ssl, 0 ) ); -} - -/* - * SSL set accessors - */ -void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint ) -{ - conf->endpoint = endpoint; -} - -void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport ) -{ - conf->transport = transport; -} - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) -void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode ) -{ - conf->anti_replay = mode; -} -#endif - -#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT) -void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit ) -{ - conf->badmac_limit = limit; -} -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - -void mbedtls_ssl_set_datagram_packing( mbedtls_ssl_context *ssl, - unsigned allow_packing ) -{ - ssl->disable_datagram_packing = !allow_packing; -} - -void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf, - uint32_t min, uint32_t max ) -{ - conf->hs_timeout_min = min; - conf->hs_timeout_max = max; -} -#endif - -void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode ) -{ - conf->authmode = authmode; -} - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf, - int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *), - void *p_vrfy ) -{ - conf->f_vrfy = f_vrfy; - conf->p_vrfy = p_vrfy; -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf, - int (*f_rng)(void *, unsigned char *, size_t), - void *p_rng ) -{ - conf->f_rng = f_rng; - conf->p_rng = p_rng; -} - -void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf, - void (*f_dbg)(void *, int, const char *, int, const char *), - void *p_dbg ) -{ - conf->f_dbg = f_dbg; - conf->p_dbg = p_dbg; -} - -void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl, - void *p_bio, - mbedtls_ssl_send_t *f_send, - mbedtls_ssl_recv_t *f_recv, - mbedtls_ssl_recv_timeout_t *f_recv_timeout ) -{ - ssl->p_bio = p_bio; - ssl->f_send = f_send; - ssl->f_recv = f_recv; - ssl->f_recv_timeout = f_recv_timeout; -} - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -void mbedtls_ssl_set_mtu( mbedtls_ssl_context *ssl, uint16_t mtu ) -{ - ssl->mtu = mtu; -} -#endif - -void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout ) -{ - conf->read_timeout = timeout; -} - -void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl, - void *p_timer, - mbedtls_ssl_set_timer_t *f_set_timer, - mbedtls_ssl_get_timer_t *f_get_timer ) -{ - ssl->p_timer = p_timer; - ssl->f_set_timer = f_set_timer; - ssl->f_get_timer = f_get_timer; - - /* Make sure we start with no timer running */ - mbedtls_ssl_set_timer( ssl, 0 ); -} - -#if defined(MBEDTLS_SSL_SRV_C) -void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf, - void *p_cache, - int (*f_get_cache)(void *, mbedtls_ssl_session *), - int (*f_set_cache)(void *, const mbedtls_ssl_session *) ) -{ - conf->p_cache = p_cache; - conf->f_get_cache = f_get_cache; - conf->f_set_cache = f_set_cache; -} -#endif /* MBEDTLS_SSL_SRV_C */ - -#if defined(MBEDTLS_SSL_CLI_C) -int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session *session ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ssl == NULL || - session == NULL || - ssl->session_negotiate == NULL || - ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - if( ( ret = mbedtls_ssl_session_copy( ssl->session_negotiate, - session ) ) != 0 ) - return( ret ); - - ssl->handshake->resume = 1; - - return( 0 ); -} -#endif /* MBEDTLS_SSL_CLI_C */ - -void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf, - const int *ciphersuites ) -{ - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = ciphersuites; - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = ciphersuites; - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = ciphersuites; - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = ciphersuites; -} - -void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf, - const int *ciphersuites, - int major, int minor ) -{ - if( major != MBEDTLS_SSL_MAJOR_VERSION_3 ) - return; - - if( minor < MBEDTLS_SSL_MINOR_VERSION_0 || minor > MBEDTLS_SSL_MINOR_VERSION_3 ) - return; - - conf->ciphersuite_list[minor] = ciphersuites; -} - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf, - const mbedtls_x509_crt_profile *profile ) -{ - conf->cert_profile = profile; -} - -/* Append a new keycert entry to a (possibly empty) list */ -static int ssl_append_key_cert( mbedtls_ssl_key_cert **head, - mbedtls_x509_crt *cert, - mbedtls_pk_context *key ) -{ - mbedtls_ssl_key_cert *new_cert; - - new_cert = mbedtls_calloc( 1, sizeof( mbedtls_ssl_key_cert ) ); - if( new_cert == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - new_cert->cert = cert; - new_cert->key = key; - new_cert->next = NULL; - - /* Update head is the list was null, else add to the end */ - if( *head == NULL ) - { - *head = new_cert; - } - else - { - mbedtls_ssl_key_cert *cur = *head; - while( cur->next != NULL ) - cur = cur->next; - cur->next = new_cert; - } - - return( 0 ); -} - -int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf, - mbedtls_x509_crt *own_cert, - mbedtls_pk_context *pk_key ) -{ - return( ssl_append_key_cert( &conf->key_cert, own_cert, pk_key ) ); -} - -void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf, - mbedtls_x509_crt *ca_chain, - mbedtls_x509_crl *ca_crl ) -{ - conf->ca_chain = ca_chain; - conf->ca_crl = ca_crl; - -#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK) - /* mbedtls_ssl_conf_ca_chain() and mbedtls_ssl_conf_ca_cb() - * cannot be used together. */ - conf->f_ca_cb = NULL; - conf->p_ca_cb = NULL; -#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */ -} - -#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK) -void mbedtls_ssl_conf_ca_cb( mbedtls_ssl_config *conf, - mbedtls_x509_crt_ca_cb_t f_ca_cb, - void *p_ca_cb ) -{ - conf->f_ca_cb = f_ca_cb; - conf->p_ca_cb = p_ca_cb; - - /* mbedtls_ssl_conf_ca_chain() and mbedtls_ssl_conf_ca_cb() - * cannot be used together. */ - conf->ca_chain = NULL; - conf->ca_crl = NULL; -} -#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) -int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl, - mbedtls_x509_crt *own_cert, - mbedtls_pk_context *pk_key ) -{ - return( ssl_append_key_cert( &ssl->handshake->sni_key_cert, - own_cert, pk_key ) ); -} - -void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl, - mbedtls_x509_crt *ca_chain, - mbedtls_x509_crl *ca_crl ) -{ - ssl->handshake->sni_ca_chain = ca_chain; - ssl->handshake->sni_ca_crl = ca_crl; -} - -void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl, - int authmode ) -{ - ssl->handshake->sni_authmode = authmode; -} -#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -void mbedtls_ssl_set_verify( mbedtls_ssl_context *ssl, - int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *), - void *p_vrfy ) -{ - ssl->f_vrfy = f_vrfy; - ssl->p_vrfy = p_vrfy; -} -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) -/* - * Set EC J-PAKE password for current handshake - */ -int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl, - const unsigned char *pw, - size_t pw_len ) -{ - mbedtls_ecjpake_role role; - - if( ssl->handshake == NULL || ssl->conf == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - role = MBEDTLS_ECJPAKE_SERVER; - else - role = MBEDTLS_ECJPAKE_CLIENT; - - return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx, - role, - MBEDTLS_MD_SHA256, - MBEDTLS_ECP_DP_SECP256R1, - pw, pw_len ) ); -} -#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */ - -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) - -static void ssl_conf_remove_psk( mbedtls_ssl_config *conf ) -{ - /* Remove reference to existing PSK, if any. */ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - if( ! mbedtls_svc_key_id_is_null( conf->psk_opaque ) ) - { - /* The maintenance of the PSK key slot is the - * user's responsibility. */ - conf->psk_opaque = MBEDTLS_SVC_KEY_ID_INIT; - } - /* This and the following branch should never - * be taken simultaenously as we maintain the - * invariant that raw and opaque PSKs are never - * configured simultaneously. As a safeguard, - * though, `else` is omitted here. */ -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - if( conf->psk != NULL ) - { - mbedtls_platform_zeroize( conf->psk, conf->psk_len ); - - mbedtls_free( conf->psk ); - conf->psk = NULL; - conf->psk_len = 0; - } - - /* Remove reference to PSK identity, if any. */ - if( conf->psk_identity != NULL ) - { - mbedtls_free( conf->psk_identity ); - conf->psk_identity = NULL; - conf->psk_identity_len = 0; - } -} - -/* This function assumes that PSK identity in the SSL config is unset. - * It checks that the provided identity is well-formed and attempts - * to make a copy of it in the SSL config. - * On failure, the PSK identity in the config remains unset. */ -static int ssl_conf_set_psk_identity( mbedtls_ssl_config *conf, - unsigned char const *psk_identity, - size_t psk_identity_len ) -{ - /* Identity len will be encoded on two bytes */ - if( psk_identity == NULL || - ( psk_identity_len >> 16 ) != 0 || - psk_identity_len > MBEDTLS_SSL_OUT_CONTENT_LEN ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - conf->psk_identity = mbedtls_calloc( 1, psk_identity_len ); - if( conf->psk_identity == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - conf->psk_identity_len = psk_identity_len; - memcpy( conf->psk_identity, psk_identity, conf->psk_identity_len ); - - return( 0 ); -} - -int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf, - const unsigned char *psk, size_t psk_len, - const unsigned char *psk_identity, size_t psk_identity_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - /* Remove opaque/raw PSK + PSK Identity */ - ssl_conf_remove_psk( conf ); - - /* Check and set raw PSK */ - if( psk == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - if( psk_len == 0 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - if( psk_len > MBEDTLS_PSK_MAX_LEN ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( ( conf->psk = mbedtls_calloc( 1, psk_len ) ) == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - conf->psk_len = psk_len; - memcpy( conf->psk, psk, conf->psk_len ); - - /* Check and set PSK Identity */ - ret = ssl_conf_set_psk_identity( conf, psk_identity, psk_identity_len ); - if( ret != 0 ) - ssl_conf_remove_psk( conf ); - - return( ret ); -} - -static void ssl_remove_psk( mbedtls_ssl_context *ssl ) -{ -#if defined(MBEDTLS_USE_PSA_CRYPTO) - if( ! mbedtls_svc_key_id_is_null( ssl->handshake->psk_opaque ) ) - { - ssl->handshake->psk_opaque = MBEDTLS_SVC_KEY_ID_INIT; - } - else -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - if( ssl->handshake->psk != NULL ) - { - mbedtls_platform_zeroize( ssl->handshake->psk, - ssl->handshake->psk_len ); - mbedtls_free( ssl->handshake->psk ); - ssl->handshake->psk_len = 0; - } -} - -int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl, - const unsigned char *psk, size_t psk_len ) -{ - if( psk == NULL || ssl->handshake == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( psk_len > MBEDTLS_PSK_MAX_LEN ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl_remove_psk( ssl ); - - if( ( ssl->handshake->psk = mbedtls_calloc( 1, psk_len ) ) == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - ssl->handshake->psk_len = psk_len; - memcpy( ssl->handshake->psk, psk, ssl->handshake->psk_len ); - - return( 0 ); -} - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -int mbedtls_ssl_conf_psk_opaque( mbedtls_ssl_config *conf, - psa_key_id_t psk, - const unsigned char *psk_identity, - size_t psk_identity_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - /* Clear opaque/raw PSK + PSK Identity, if present. */ - ssl_conf_remove_psk( conf ); - - /* Check and set opaque PSK */ - if( mbedtls_svc_key_id_is_null( psk ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - conf->psk_opaque = psk; - - /* Check and set PSK Identity */ - ret = ssl_conf_set_psk_identity( conf, psk_identity, - psk_identity_len ); - if( ret != 0 ) - ssl_conf_remove_psk( conf ); - - return( ret ); -} - -int mbedtls_ssl_set_hs_psk_opaque( mbedtls_ssl_context *ssl, - psa_key_id_t psk ) -{ - if( ( mbedtls_svc_key_id_is_null( psk ) ) || - ( ssl->handshake == NULL ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl_remove_psk( ssl ); - ssl->handshake->psk_opaque = psk; - return( 0 ); -} -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - -void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf, - int (*f_psk)(void *, mbedtls_ssl_context *, const unsigned char *, - size_t), - void *p_psk ) -{ - conf->f_psk = f_psk; - conf->p_psk = p_psk; -} -#endif /* MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED */ - -#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C) - -#if !defined(MBEDTLS_DEPRECATED_REMOVED) -int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config *conf, const char *dhm_P, const char *dhm_G ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_mpi_read_string( &conf->dhm_P, 16, dhm_P ) ) != 0 || - ( ret = mbedtls_mpi_read_string( &conf->dhm_G, 16, dhm_G ) ) != 0 ) - { - mbedtls_mpi_free( &conf->dhm_P ); - mbedtls_mpi_free( &conf->dhm_G ); - return( ret ); - } - - return( 0 ); -} -#endif /* MBEDTLS_DEPRECATED_REMOVED */ - -int mbedtls_ssl_conf_dh_param_bin( mbedtls_ssl_config *conf, - const unsigned char *dhm_P, size_t P_len, - const unsigned char *dhm_G, size_t G_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_mpi_read_binary( &conf->dhm_P, dhm_P, P_len ) ) != 0 || - ( ret = mbedtls_mpi_read_binary( &conf->dhm_G, dhm_G, G_len ) ) != 0 ) - { - mbedtls_mpi_free( &conf->dhm_P ); - mbedtls_mpi_free( &conf->dhm_G ); - return( ret ); - } - - return( 0 ); -} - -int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config *conf, mbedtls_dhm_context *dhm_ctx ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_mpi_copy( &conf->dhm_P, &dhm_ctx->P ) ) != 0 || - ( ret = mbedtls_mpi_copy( &conf->dhm_G, &dhm_ctx->G ) ) != 0 ) - { - mbedtls_mpi_free( &conf->dhm_P ); - mbedtls_mpi_free( &conf->dhm_G ); - return( ret ); - } - - return( 0 ); -} -#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_SRV_C */ - -#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C) -/* - * Set the minimum length for Diffie-Hellman parameters - */ -void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf, - unsigned int bitlen ) -{ - conf->dhm_min_bitlen = bitlen; -} -#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */ - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -/* - * Set allowed/preferred hashes for handshake signatures - */ -void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf, - const int *hashes ) -{ - conf->sig_hashes = hashes; -} -#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -#if defined(MBEDTLS_ECP_C) -/* - * Set the allowed elliptic curves - */ -void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf, - const mbedtls_ecp_group_id *curve_list ) -{ - conf->curve_list = curve_list; -} -#endif /* MBEDTLS_ECP_C */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname ) -{ - /* Initialize to suppress unnecessary compiler warning */ - size_t hostname_len = 0; - - /* Check if new hostname is valid before - * making any change to current one */ - if( hostname != NULL ) - { - hostname_len = strlen( hostname ); - - if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME_LEN ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - /* Now it's clear that we will overwrite the old hostname, - * so we can free it safely */ - - if( ssl->hostname != NULL ) - { - mbedtls_platform_zeroize( ssl->hostname, strlen( ssl->hostname ) ); - mbedtls_free( ssl->hostname ); - } - - /* Passing NULL as hostname shall clear the old one */ - - if( hostname == NULL ) - { - ssl->hostname = NULL; - } - else - { - ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 ); - if( ssl->hostname == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - memcpy( ssl->hostname, hostname, hostname_len ); - - ssl->hostname[hostname_len] = '\0'; - } - - return( 0 ); -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) -void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf, - int (*f_sni)(void *, mbedtls_ssl_context *, - const unsigned char *, size_t), - void *p_sni ) -{ - conf->f_sni = f_sni; - conf->p_sni = p_sni; -} -#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */ - -#if defined(MBEDTLS_SSL_ALPN) -int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config *conf, const char **protos ) -{ - size_t cur_len, tot_len; - const char **p; - - /* - * RFC 7301 3.1: "Empty strings MUST NOT be included and byte strings - * MUST NOT be truncated." - * We check lengths now rather than later. - */ - tot_len = 0; - for( p = protos; *p != NULL; p++ ) - { - cur_len = strlen( *p ); - tot_len += cur_len; - - if( ( cur_len == 0 ) || - ( cur_len > MBEDTLS_SSL_MAX_ALPN_NAME_LEN ) || - ( tot_len > MBEDTLS_SSL_MAX_ALPN_LIST_LEN ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - conf->alpn_list = protos; - - return( 0 ); -} - -const char *mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context *ssl ) -{ - return( ssl->alpn_chosen ); -} -#endif /* MBEDTLS_SSL_ALPN */ - -#if defined(MBEDTLS_SSL_DTLS_SRTP) -void mbedtls_ssl_conf_srtp_mki_value_supported( mbedtls_ssl_config *conf, - int support_mki_value ) -{ - conf->dtls_srtp_mki_support = support_mki_value; -} - -int mbedtls_ssl_dtls_srtp_set_mki_value( mbedtls_ssl_context *ssl, - unsigned char *mki_value, - uint16_t mki_len ) -{ - if( mki_len > MBEDTLS_TLS_SRTP_MAX_MKI_LENGTH ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - if( ssl->conf->dtls_srtp_mki_support == MBEDTLS_SSL_DTLS_SRTP_MKI_UNSUPPORTED ) - { - return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE ); - } - - memcpy( ssl->dtls_srtp_info.mki_value, mki_value, mki_len ); - ssl->dtls_srtp_info.mki_len = mki_len; - return( 0 ); -} - -int mbedtls_ssl_conf_dtls_srtp_protection_profiles( mbedtls_ssl_config *conf, - const mbedtls_ssl_srtp_profile *profiles ) -{ - const mbedtls_ssl_srtp_profile *p; - size_t list_size = 0; - - /* check the profiles list: all entry must be valid, - * its size cannot be more than the total number of supported profiles, currently 4 */ - for( p = profiles; *p != MBEDTLS_TLS_SRTP_UNSET && - list_size <= MBEDTLS_TLS_SRTP_MAX_PROFILE_LIST_LENGTH; - p++ ) - { - if( mbedtls_ssl_check_srtp_profile_value( *p ) != MBEDTLS_TLS_SRTP_UNSET ) - { - list_size++; - } - else - { - /* unsupported value, stop parsing and set the size to an error value */ - list_size = MBEDTLS_TLS_SRTP_MAX_PROFILE_LIST_LENGTH + 1; - } - } - - if( list_size > MBEDTLS_TLS_SRTP_MAX_PROFILE_LIST_LENGTH ) - { - conf->dtls_srtp_profile_list = NULL; - conf->dtls_srtp_profile_list_len = 0; - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - conf->dtls_srtp_profile_list = profiles; - conf->dtls_srtp_profile_list_len = list_size; - - return( 0 ); -} - -void mbedtls_ssl_get_dtls_srtp_negotiation_result( const mbedtls_ssl_context *ssl, - mbedtls_dtls_srtp_info *dtls_srtp_info ) -{ - dtls_srtp_info->chosen_dtls_srtp_profile = ssl->dtls_srtp_info.chosen_dtls_srtp_profile; - /* do not copy the mki value if there is no chosen profile */ - if( dtls_srtp_info->chosen_dtls_srtp_profile == MBEDTLS_TLS_SRTP_UNSET ) - { - dtls_srtp_info->mki_len = 0; - } - else - { - dtls_srtp_info->mki_len = ssl->dtls_srtp_info.mki_len; - memcpy( dtls_srtp_info->mki_value, ssl->dtls_srtp_info.mki_value, - ssl->dtls_srtp_info.mki_len ); - } -} -#endif /* MBEDTLS_SSL_DTLS_SRTP */ - -void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor ) -{ - conf->max_major_ver = major; - conf->max_minor_ver = minor; -} - -void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor ) -{ - conf->min_major_ver = major; - conf->min_minor_ver = minor; -} - -#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C) -void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback ) -{ - conf->fallback = fallback; -} -#endif - -#if defined(MBEDTLS_SSL_SRV_C) -void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf, - char cert_req_ca_list ) -{ - conf->cert_req_ca_list = cert_req_ca_list; -} -#endif - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) -void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm ) -{ - conf->encrypt_then_mac = etm; -} -#endif - -#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) -void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems ) -{ - conf->extended_ms = ems; -} -#endif - -#if defined(MBEDTLS_ARC4_C) -void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 ) -{ - conf->arc4_disabled = arc4; -} -#endif - -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) -int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code ) -{ - if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID || - ssl_mfl_code_to_length( mfl_code ) > MBEDTLS_TLS_EXT_ADV_CONTENT_LEN ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - conf->mfl_code = mfl_code; - - return( 0 ); -} -#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */ - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) -void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate ) -{ - conf->trunc_hmac = truncate; -} -#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */ - -#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING) -void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split ) -{ - conf->cbc_record_splitting = split; -} -#endif - -void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy ) -{ - conf->allow_legacy_renegotiation = allow_legacy; -} - -#if defined(MBEDTLS_SSL_RENEGOTIATION) -void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation ) -{ - conf->disable_renegotiation = renegotiation; -} - -void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records ) -{ - conf->renego_max_records = max_records; -} - -void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf, - const unsigned char period[8] ) -{ - memcpy( conf->renego_period, period, 8 ); -} -#endif /* MBEDTLS_SSL_RENEGOTIATION */ - -#if defined(MBEDTLS_SSL_SESSION_TICKETS) -#if defined(MBEDTLS_SSL_CLI_C) -void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets ) -{ - conf->session_tickets = use_tickets; -} -#endif - -#if defined(MBEDTLS_SSL_SRV_C) -void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf, - mbedtls_ssl_ticket_write_t *f_ticket_write, - mbedtls_ssl_ticket_parse_t *f_ticket_parse, - void *p_ticket ) -{ - conf->f_ticket_write = f_ticket_write; - conf->f_ticket_parse = f_ticket_parse; - conf->p_ticket = p_ticket; -} -#endif -#endif /* MBEDTLS_SSL_SESSION_TICKETS */ - -#if defined(MBEDTLS_SSL_EXPORT_KEYS) -void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf, - mbedtls_ssl_export_keys_t *f_export_keys, - void *p_export_keys ) -{ - conf->f_export_keys = f_export_keys; - conf->p_export_keys = p_export_keys; -} - -void mbedtls_ssl_conf_export_keys_ext_cb( mbedtls_ssl_config *conf, - mbedtls_ssl_export_keys_ext_t *f_export_keys_ext, - void *p_export_keys ) -{ - conf->f_export_keys_ext = f_export_keys_ext; - conf->p_export_keys = p_export_keys; -} -#endif - -#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) -void mbedtls_ssl_conf_async_private_cb( - mbedtls_ssl_config *conf, - mbedtls_ssl_async_sign_t *f_async_sign, - mbedtls_ssl_async_decrypt_t *f_async_decrypt, - mbedtls_ssl_async_resume_t *f_async_resume, - mbedtls_ssl_async_cancel_t *f_async_cancel, - void *async_config_data ) -{ - conf->f_async_sign_start = f_async_sign; - conf->f_async_decrypt_start = f_async_decrypt; - conf->f_async_resume = f_async_resume; - conf->f_async_cancel = f_async_cancel; - conf->p_async_config_data = async_config_data; -} - -void *mbedtls_ssl_conf_get_async_config_data( const mbedtls_ssl_config *conf ) -{ - return( conf->p_async_config_data ); -} - -void *mbedtls_ssl_get_async_operation_data( const mbedtls_ssl_context *ssl ) -{ - if( ssl->handshake == NULL ) - return( NULL ); - else - return( ssl->handshake->user_async_ctx ); -} - -void mbedtls_ssl_set_async_operation_data( mbedtls_ssl_context *ssl, - void *ctx ) -{ - if( ssl->handshake != NULL ) - ssl->handshake->user_async_ctx = ctx; -} -#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */ - -/* - * SSL get accessors - */ -uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl ) -{ - if( ssl->session != NULL ) - return( ssl->session->verify_result ); - - if( ssl->session_negotiate != NULL ) - return( ssl->session_negotiate->verify_result ); - - return( 0xFFFFFFFF ); -} - -const char *mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context *ssl ) -{ - if( ssl == NULL || ssl->session == NULL ) - return( NULL ); - - return mbedtls_ssl_get_ciphersuite_name( ssl->session->ciphersuite ); -} - -const char *mbedtls_ssl_get_version( const mbedtls_ssl_context *ssl ) -{ -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - { - switch( ssl->minor_ver ) - { - case MBEDTLS_SSL_MINOR_VERSION_2: - return( "DTLSv1.0" ); - - case MBEDTLS_SSL_MINOR_VERSION_3: - return( "DTLSv1.2" ); - - default: - return( "unknown (DTLS)" ); - } - } -#endif - - switch( ssl->minor_ver ) - { - case MBEDTLS_SSL_MINOR_VERSION_0: - return( "SSLv3.0" ); - - case MBEDTLS_SSL_MINOR_VERSION_1: - return( "TLSv1.0" ); - - case MBEDTLS_SSL_MINOR_VERSION_2: - return( "TLSv1.1" ); - - case MBEDTLS_SSL_MINOR_VERSION_3: - return( "TLSv1.2" ); - - default: - return( "unknown" ); - } -} - -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) -size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl ) -{ - size_t max_len = MBEDTLS_SSL_MAX_CONTENT_LEN; - size_t read_mfl; - - /* Use the configured MFL for the client if we're past SERVER_HELLO_DONE */ - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT && - ssl->state >= MBEDTLS_SSL_SERVER_HELLO_DONE ) - { - return ssl_mfl_code_to_length( ssl->conf->mfl_code ); - } - - /* Check if a smaller max length was negotiated */ - if( ssl->session_out != NULL ) - { - read_mfl = ssl_mfl_code_to_length( ssl->session_out->mfl_code ); - if( read_mfl < max_len ) - { - max_len = read_mfl; - } - } - - // During a handshake, use the value being negotiated - if( ssl->session_negotiate != NULL ) - { - read_mfl = ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code ); - if( read_mfl < max_len ) - { - max_len = read_mfl; - } - } - - return( max_len ); -} - -size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl ) -{ - size_t max_len; - - /* - * Assume mfl_code is correct since it was checked when set - */ - max_len = ssl_mfl_code_to_length( ssl->conf->mfl_code ); - - /* Check if a smaller max length was negotiated */ - if( ssl->session_out != NULL && - ssl_mfl_code_to_length( ssl->session_out->mfl_code ) < max_len ) - { - max_len = ssl_mfl_code_to_length( ssl->session_out->mfl_code ); - } - - /* During a handshake, use the value being negotiated */ - if( ssl->session_negotiate != NULL && - ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code ) < max_len ) - { - max_len = ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code ); - } - - return( max_len ); -} - -#if !defined(MBEDTLS_DEPRECATED_REMOVED) -size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl ) -{ - return mbedtls_ssl_get_output_max_frag_len( ssl ); -} -#endif /* !MBEDTLS_DEPRECATED_REMOVED */ -#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) -size_t mbedtls_ssl_get_current_mtu( const mbedtls_ssl_context *ssl ) -{ - /* Return unlimited mtu for client hello messages to avoid fragmentation. */ - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT && - ( ssl->state == MBEDTLS_SSL_CLIENT_HELLO || - ssl->state == MBEDTLS_SSL_SERVER_HELLO ) ) - return ( 0 ); - - if( ssl->handshake == NULL || ssl->handshake->mtu == 0 ) - return( ssl->mtu ); - - if( ssl->mtu == 0 ) - return( ssl->handshake->mtu ); - - return( ssl->mtu < ssl->handshake->mtu ? - ssl->mtu : ssl->handshake->mtu ); -} -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl ) -{ - size_t max_len = MBEDTLS_SSL_OUT_CONTENT_LEN; - -#if !defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) && \ - !defined(MBEDTLS_SSL_PROTO_DTLS) - (void) ssl; -#endif - -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) - const size_t mfl = mbedtls_ssl_get_output_max_frag_len( ssl ); - - if( max_len > mfl ) - max_len = mfl; -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( mbedtls_ssl_get_current_mtu( ssl ) != 0 ) - { - const size_t mtu = mbedtls_ssl_get_current_mtu( ssl ); - const int ret = mbedtls_ssl_get_record_expansion( ssl ); - const size_t overhead = (size_t) ret; - - if( ret < 0 ) - return( ret ); - - if( mtu <= overhead ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "MTU too low for record expansion" ) ); - return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE ); - } - - if( max_len > mtu - overhead ) - max_len = mtu - overhead; - } -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#if !defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) && \ - !defined(MBEDTLS_SSL_PROTO_DTLS) - ((void) ssl); -#endif - - return( (int) max_len ); -} - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -const mbedtls_x509_crt *mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context *ssl ) -{ - if( ssl == NULL || ssl->session == NULL ) - return( NULL ); - -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - return( ssl->session->peer_cert ); -#else - return( NULL ); -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_CLI_C) -int mbedtls_ssl_get_session( const mbedtls_ssl_context *ssl, - mbedtls_ssl_session *dst ) -{ - if( ssl == NULL || - dst == NULL || - ssl->session == NULL || - ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - return( mbedtls_ssl_session_copy( dst, ssl->session ) ); -} -#endif /* MBEDTLS_SSL_CLI_C */ - -const mbedtls_ssl_session *mbedtls_ssl_get_session_pointer( const mbedtls_ssl_context *ssl ) -{ - if( ssl == NULL ) - return( NULL ); - - return( ssl->session ); -} - -/* - * Define ticket header determining Mbed TLS version - * and structure of the ticket. - */ - -/* - * Define bitflag determining compile-time settings influencing - * structure of serialized SSL sessions. - */ - -#if defined(MBEDTLS_HAVE_TIME) -#define SSL_SERIALIZED_SESSION_CONFIG_TIME 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_TIME 0 -#endif /* MBEDTLS_HAVE_TIME */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#define SSL_SERIALIZED_SESSION_CONFIG_CRT 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_CRT 0 -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -#if defined(MBEDTLS_SSL_CLI_C) && defined(MBEDTLS_SSL_SESSION_TICKETS) -#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET 0 -#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_SESSION_TICKETS */ - -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) -#define SSL_SERIALIZED_SESSION_CONFIG_MFL 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_MFL 0 -#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */ - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) -#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC 0 -#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */ - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) -#define SSL_SERIALIZED_SESSION_CONFIG_ETM 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_ETM 0 -#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */ - -#if defined(MBEDTLS_SSL_SESSION_TICKETS) -#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 1 -#else -#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 0 -#endif /* MBEDTLS_SSL_SESSION_TICKETS */ - -#define SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT 0 -#define SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT 1 -#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT 2 -#define SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT 3 -#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT 4 -#define SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT 5 -#define SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT 6 - -#define SSL_SERIALIZED_SESSION_CONFIG_BITFLAG \ - ( (uint16_t) ( \ - ( SSL_SERIALIZED_SESSION_CONFIG_TIME << SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_CRT << SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET << SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_MFL << SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC << SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_ETM << SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT ) | \ - ( SSL_SERIALIZED_SESSION_CONFIG_TICKET << SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT ) ) ) - -static unsigned char ssl_serialized_session_header[] = { - MBEDTLS_VERSION_MAJOR, - MBEDTLS_VERSION_MINOR, - MBEDTLS_VERSION_PATCH, - ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 8 ) & 0xFF, - ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 0 ) & 0xFF, -}; - -/* - * Serialize a session in the following format: - * (in the presentation language of TLS, RFC 8446 section 3) - * - * opaque mbedtls_version[3]; // major, minor, patch - * opaque session_format[2]; // version-specific 16-bit field determining - * // the format of the remaining - * // serialized data. - * - * Note: When updating the format, remember to keep - * these version+format bytes. - * - * // In this version, `session_format` determines - * // the setting of those compile-time - * // configuration options which influence - * // the structure of mbedtls_ssl_session. - * uint64 start_time; - * uint8 ciphersuite[2]; // defined by the standard - * uint8 compression; // 0 or 1 - * uint8 session_id_len; // at most 32 - * opaque session_id[32]; - * opaque master[48]; // fixed length in the standard - * uint32 verify_result; - * opaque peer_cert<0..2^24-1>; // length 0 means no peer cert - * opaque ticket<0..2^24-1>; // length 0 means no ticket - * uint32 ticket_lifetime; - * uint8 mfl_code; // up to 255 according to standard - * uint8 trunc_hmac; // 0 or 1 - * uint8 encrypt_then_mac; // 0 or 1 - * - * The order is the same as in the definition of the structure, except - * verify_result is put before peer_cert so that all mandatory fields come - * together in one block. - */ -static int ssl_session_save( const mbedtls_ssl_session *session, - unsigned char omit_header, - unsigned char *buf, - size_t buf_len, - size_t *olen ) -{ - unsigned char *p = buf; - size_t used = 0; -#if defined(MBEDTLS_HAVE_TIME) - uint64_t start; -#endif -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - size_t cert_len; -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - - - if( !omit_header ) - { - /* - * Add version identifier - */ - - used += sizeof( ssl_serialized_session_header ); - - if( used <= buf_len ) - { - memcpy( p, ssl_serialized_session_header, - sizeof( ssl_serialized_session_header ) ); - p += sizeof( ssl_serialized_session_header ); - } - } - - /* - * Time - */ -#if defined(MBEDTLS_HAVE_TIME) - used += 8; - - if( used <= buf_len ) - { - start = (uint64_t) session->start; - - *p++ = (unsigned char)( ( start >> 56 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 48 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 40 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 32 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( start >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( start ) & 0xFF ); - } -#endif /* MBEDTLS_HAVE_TIME */ - - /* - * Basic mandatory fields - */ - used += 2 /* ciphersuite */ - + 1 /* compression */ - + 1 /* id_len */ - + sizeof( session->id ) - + sizeof( session->master ) - + 4; /* verify_result */ - - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( session->ciphersuite >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ciphersuite ) & 0xFF ); - - *p++ = (unsigned char)( session->compression & 0xFF ); - - *p++ = (unsigned char)( session->id_len & 0xFF ); - memcpy( p, session->id, 32 ); - p += 32; - - memcpy( p, session->master, 48 ); - p += 48; - - *p++ = (unsigned char)( ( session->verify_result >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( session->verify_result >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( session->verify_result >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( session->verify_result ) & 0xFF ); - } - - /* - * Peer's end-entity certificate - */ -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - if( session->peer_cert == NULL ) - cert_len = 0; - else - cert_len = session->peer_cert->raw.len; - - used += 3 + cert_len; - - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( cert_len >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( cert_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( cert_len ) & 0xFF ); - - if( session->peer_cert != NULL ) - { - memcpy( p, session->peer_cert->raw.p, cert_len ); - p += cert_len; - } - } -#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - if( session->peer_cert_digest != NULL ) - { - used += 1 /* type */ + 1 /* length */ + session->peer_cert_digest_len; - if( used <= buf_len ) - { - *p++ = (unsigned char) session->peer_cert_digest_type; - *p++ = (unsigned char) session->peer_cert_digest_len; - memcpy( p, session->peer_cert_digest, - session->peer_cert_digest_len ); - p += session->peer_cert_digest_len; - } - } - else - { - used += 2; - if( used <= buf_len ) - { - *p++ = (unsigned char) MBEDTLS_MD_NONE; - *p++ = 0; - } - } -#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - - /* - * Session ticket if any, plus associated data - */ -#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C) - used += 3 + session->ticket_len + 4; /* len + ticket + lifetime */ - - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( session->ticket_len >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ticket_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ticket_len ) & 0xFF ); - - if( session->ticket != NULL ) - { - memcpy( p, session->ticket, session->ticket_len ); - p += session->ticket_len; - } - - *p++ = (unsigned char)( ( session->ticket_lifetime >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ticket_lifetime >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ticket_lifetime >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( session->ticket_lifetime ) & 0xFF ); - } -#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */ - - /* - * Misc extension-related info - */ -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) - used += 1; - - if( used <= buf_len ) - *p++ = session->mfl_code; -#endif - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - used += 1; - - if( used <= buf_len ) - *p++ = (unsigned char)( ( session->trunc_hmac ) & 0xFF ); -#endif - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - used += 1; - - if( used <= buf_len ) - *p++ = (unsigned char)( ( session->encrypt_then_mac ) & 0xFF ); -#endif - - /* Done */ - *olen = used; - - if( used > buf_len ) - return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); - - return( 0 ); -} - -/* - * Public wrapper for ssl_session_save() - */ -int mbedtls_ssl_session_save( const mbedtls_ssl_session *session, - unsigned char *buf, - size_t buf_len, - size_t *olen ) -{ - return( ssl_session_save( session, 0, buf, buf_len, olen ) ); -} - -/* - * Deserialize session, see mbedtls_ssl_session_save() for format. - * - * This internal version is wrapped by a public function that cleans up in - * case of error, and has an extra option omit_header. - */ -static int ssl_session_load( mbedtls_ssl_session *session, - unsigned char omit_header, - const unsigned char *buf, - size_t len ) -{ - const unsigned char *p = buf; - const unsigned char * const end = buf + len; -#if defined(MBEDTLS_HAVE_TIME) - uint64_t start; -#endif -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - size_t cert_len; -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - - if( !omit_header ) - { - /* - * Check version identifier - */ - - if( (size_t)( end - p ) < sizeof( ssl_serialized_session_header ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( memcmp( p, ssl_serialized_session_header, - sizeof( ssl_serialized_session_header ) ) != 0 ) - { - return( MBEDTLS_ERR_SSL_VERSION_MISMATCH ); - } - p += sizeof( ssl_serialized_session_header ); - } - - /* - * Time - */ -#if defined(MBEDTLS_HAVE_TIME) - if( 8 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - start = ( (uint64_t) p[0] << 56 ) | - ( (uint64_t) p[1] << 48 ) | - ( (uint64_t) p[2] << 40 ) | - ( (uint64_t) p[3] << 32 ) | - ( (uint64_t) p[4] << 24 ) | - ( (uint64_t) p[5] << 16 ) | - ( (uint64_t) p[6] << 8 ) | - ( (uint64_t) p[7] ); - p += 8; - - session->start = (time_t) start; -#endif /* MBEDTLS_HAVE_TIME */ - - /* - * Basic mandatory fields - */ - if( 2 + 1 + 1 + 32 + 48 + 4 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->ciphersuite = ( p[0] << 8 ) | p[1]; - p += 2; - - session->compression = *p++; - - session->id_len = *p++; - memcpy( session->id, p, 32 ); - p += 32; - - memcpy( session->master, p, 48 ); - p += 48; - - session->verify_result = ( (uint32_t) p[0] << 24 ) | - ( (uint32_t) p[1] << 16 ) | - ( (uint32_t) p[2] << 8 ) | - ( (uint32_t) p[3] ); - p += 4; - - /* Immediately clear invalid pointer values that have been read, in case - * we exit early before we replaced them with valid ones. */ -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - session->peer_cert = NULL; -#else - session->peer_cert_digest = NULL; -#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ -#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C) - session->ticket = NULL; -#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */ - - /* - * Peer certificate - */ -#if defined(MBEDTLS_X509_CRT_PARSE_C) -#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - /* Deserialize CRT from the end of the ticket. */ - if( 3 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - cert_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2]; - p += 3; - - if( cert_len != 0 ) - { - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( cert_len > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->peer_cert = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) ); - - if( session->peer_cert == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - mbedtls_x509_crt_init( session->peer_cert ); - - if( ( ret = mbedtls_x509_crt_parse_der( session->peer_cert, - p, cert_len ) ) != 0 ) - { - mbedtls_x509_crt_free( session->peer_cert ); - mbedtls_free( session->peer_cert ); - session->peer_cert = NULL; - return( ret ); - } - - p += cert_len; - } -#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - /* Deserialize CRT digest from the end of the ticket. */ - if( 2 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->peer_cert_digest_type = (mbedtls_md_type_t) *p++; - session->peer_cert_digest_len = (size_t) *p++; - - if( session->peer_cert_digest_len != 0 ) - { - const mbedtls_md_info_t *md_info = - mbedtls_md_info_from_type( session->peer_cert_digest_type ); - if( md_info == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - if( session->peer_cert_digest_len != mbedtls_md_get_size( md_info ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( session->peer_cert_digest_len > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->peer_cert_digest = - mbedtls_calloc( 1, session->peer_cert_digest_len ); - if( session->peer_cert_digest == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - memcpy( session->peer_cert_digest, p, - session->peer_cert_digest_len ); - p += session->peer_cert_digest_len; - } -#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - - /* - * Session ticket and associated data - */ -#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C) - if( 3 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->ticket_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2]; - p += 3; - - if( session->ticket_len != 0 ) - { - if( session->ticket_len > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->ticket = mbedtls_calloc( 1, session->ticket_len ); - if( session->ticket == NULL ) - return( MBEDTLS_ERR_SSL_ALLOC_FAILED ); - - memcpy( session->ticket, p, session->ticket_len ); - p += session->ticket_len; - } - - if( 4 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->ticket_lifetime = ( (uint32_t) p[0] << 24 ) | - ( (uint32_t) p[1] << 16 ) | - ( (uint32_t) p[2] << 8 ) | - ( (uint32_t) p[3] ); - p += 4; -#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */ - - /* - * Misc extension-related info - */ -#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) - if( 1 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->mfl_code = *p++; -#endif - -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - if( 1 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->trunc_hmac = *p++; -#endif - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - if( 1 > (size_t)( end - p ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session->encrypt_then_mac = *p++; -#endif - - /* Done, should have consumed entire buffer */ - if( p != end ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - return( 0 ); -} - -/* - * Deserialize session: public wrapper for error cleaning - */ -int mbedtls_ssl_session_load( mbedtls_ssl_session *session, - const unsigned char *buf, - size_t len ) -{ - int ret = ssl_session_load( session, 0, buf, len ); - - if( ret != 0 ) - mbedtls_ssl_session_free( session ); - - return( ret ); -} - -/* - * Perform a single step of the SSL handshake - */ -int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; - - if( ssl == NULL || ssl->conf == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - -#if defined(MBEDTLS_SSL_CLI_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT ) - ret = mbedtls_ssl_handshake_client_step( ssl ); -#endif -#if defined(MBEDTLS_SSL_SRV_C) - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - ret = mbedtls_ssl_handshake_server_step( ssl ); -#endif - - return( ret ); -} - -/* - * Perform the SSL handshake - */ -int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl ) -{ - int ret = 0; - - /* Sanity checks */ - - if( ssl == NULL || ssl->conf == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM && - ( ssl->f_set_timer == NULL || ssl->f_get_timer == NULL ) ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "You must use " - "mbedtls_ssl_set_timer_cb() for DTLS" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> handshake" ) ); - - /* Main handshake loop */ - while( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER ) - { - ret = mbedtls_ssl_handshake_step( ssl ); - - if( ret != 0 ) - break; - } - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= handshake" ) ); - - return( ret ); -} - -#if defined(MBEDTLS_SSL_RENEGOTIATION) -#if defined(MBEDTLS_SSL_SRV_C) -/* - * Write HelloRequest to request renegotiation on server - */ -static int ssl_write_hello_request( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello request" ) ); - - ssl->out_msglen = 4; - ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_REQUEST; - - if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret ); - return( ret ); - } - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello request" ) ); - - return( 0 ); -} -#endif /* MBEDTLS_SSL_SRV_C */ - -/* - * Actually renegotiate current connection, triggered by either: - * - any side: calling mbedtls_ssl_renegotiate(), - * - client: receiving a HelloRequest during mbedtls_ssl_read(), - * - server: receiving any handshake message on server during mbedtls_ssl_read() after - * the initial handshake is completed. - * If the handshake doesn't complete due to waiting for I/O, it will continue - * during the next calls to mbedtls_ssl_renegotiate() or mbedtls_ssl_read() respectively. - */ -int mbedtls_ssl_start_renegotiation( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) ); - - if( ( ret = ssl_handshake_init( ssl ) ) != 0 ) - return( ret ); - - /* RFC 6347 4.2.2: "[...] the HelloRequest will have message_seq = 0 and - * the ServerHello will have message_seq = 1" */ -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM && - ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING ) - { - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - ssl->handshake->out_msg_seq = 1; - else - ssl->handshake->in_msg_seq = 1; - } -#endif - - ssl->state = MBEDTLS_SSL_HELLO_REQUEST; - ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS; - - if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret ); - return( ret ); - } - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) ); - - return( 0 ); -} - -/* - * Renegotiate current connection on client, - * or request renegotiation on server - */ -int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl ) -{ - int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE; - - if( ssl == NULL || ssl->conf == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - -#if defined(MBEDTLS_SSL_SRV_C) - /* On server, just send the request */ - if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER ) - { - if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING; - - /* Did we already try/start sending HelloRequest? */ - if( ssl->out_left != 0 ) - return( mbedtls_ssl_flush_output( ssl ) ); - - return( ssl_write_hello_request( ssl ) ); - } -#endif /* MBEDTLS_SSL_SRV_C */ - -#if defined(MBEDTLS_SSL_CLI_C) - /* - * On client, either start the renegotiation process or, - * if already in progress, continue the handshake - */ - if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS ) - { - if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( ( ret = mbedtls_ssl_start_renegotiation( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_start_renegotiation", ret ); - return( ret ); - } - } - else - { - if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret ); - return( ret ); - } - } -#endif /* MBEDTLS_SSL_CLI_C */ - - return( ret ); -} -#endif /* MBEDTLS_SSL_RENEGOTIATION */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -static void ssl_key_cert_free( mbedtls_ssl_key_cert *key_cert ) -{ - mbedtls_ssl_key_cert *cur = key_cert, *next; - - while( cur != NULL ) - { - next = cur->next; - mbedtls_free( cur ); - cur = next; - } -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl ) -{ - mbedtls_ssl_handshake_params *handshake = ssl->handshake; - - if( handshake == NULL ) - return; - -#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) - if( ssl->conf->f_async_cancel != NULL && handshake->async_in_progress != 0 ) - { - ssl->conf->f_async_cancel( ssl ); - handshake->async_in_progress = 0; - } -#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */ - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) - mbedtls_md5_free( &handshake->fin_md5 ); - mbedtls_sha1_free( &handshake->fin_sha1 ); -#endif -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) -#if defined(MBEDTLS_SHA256_C) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_abort( &handshake->fin_sha256_psa ); -#else - mbedtls_sha256_free( &handshake->fin_sha256 ); -#endif -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) -#if defined(MBEDTLS_USE_PSA_CRYPTO) - psa_hash_abort( &handshake->fin_sha384_psa ); -#else - mbedtls_sha512_free( &handshake->fin_sha512 ); -#endif -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ - -#if defined(MBEDTLS_DHM_C) - mbedtls_dhm_free( &handshake->dhm_ctx ); -#endif -#if defined(MBEDTLS_ECDH_C) - mbedtls_ecdh_free( &handshake->ecdh_ctx ); -#endif -#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) - mbedtls_ecjpake_free( &handshake->ecjpake_ctx ); -#if defined(MBEDTLS_SSL_CLI_C) - mbedtls_free( handshake->ecjpake_cache ); - handshake->ecjpake_cache = NULL; - handshake->ecjpake_cache_len = 0; -#endif -#endif - -#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \ - defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED) - /* explicit void pointer cast for buggy MS compiler */ - mbedtls_free( (void *) handshake->curves ); -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) - if( handshake->psk != NULL ) - { - mbedtls_platform_zeroize( handshake->psk, handshake->psk_len ); - mbedtls_free( handshake->psk ); - } -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) && \ - defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - /* - * Free only the linked list wrapper, not the keys themselves - * since the belong to the SNI callback - */ - if( handshake->sni_key_cert != NULL ) - { - mbedtls_ssl_key_cert *cur = handshake->sni_key_cert, *next; - - while( cur != NULL ) - { - next = cur->next; - mbedtls_free( cur ); - cur = next; - } - } -#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_SERVER_NAME_INDICATION */ - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - mbedtls_x509_crt_restart_free( &handshake->ecrs_ctx ); - if( handshake->ecrs_peer_cert != NULL ) - { - mbedtls_x509_crt_free( handshake->ecrs_peer_cert ); - mbedtls_free( handshake->ecrs_peer_cert ); - } -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) && \ - !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) - mbedtls_pk_free( &handshake->peer_pubkey ); -#endif /* MBEDTLS_X509_CRT_PARSE_C && !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - mbedtls_free( handshake->verify_cookie ); - mbedtls_ssl_flight_free( handshake->flight ); - mbedtls_ssl_buffering_free( ssl ); -#endif - -#if defined(MBEDTLS_ECDH_C) && \ - defined(MBEDTLS_USE_PSA_CRYPTO) - psa_destroy_key( handshake->ecdh_psa_privkey ); -#endif /* MBEDTLS_ECDH_C && MBEDTLS_USE_PSA_CRYPTO */ - - mbedtls_platform_zeroize( handshake, - sizeof( mbedtls_ssl_handshake_params ) ); - -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - /* If the buffers are too big - reallocate. Because of the way Mbed TLS - * processes datagrams and the fact that a datagram is allowed to have - * several records in it, it is possible that the I/O buffers are not - * empty at this stage */ - handle_buffer_resizing( ssl, 1, mbedtls_ssl_get_input_buflen( ssl ), - mbedtls_ssl_get_output_buflen( ssl ) ); -#endif -} - -void mbedtls_ssl_session_free( mbedtls_ssl_session *session ) -{ - if( session == NULL ) - return; - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - ssl_clear_peer_cert( session ); -#endif - -#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C) - mbedtls_free( session->ticket ); -#endif - - mbedtls_platform_zeroize( session, sizeof( mbedtls_ssl_session ) ); -} - -#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION) - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID 1u -#else -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID 0u -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - -#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT) -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT 1u -#else -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT 0u -#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */ - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY 1u -#else -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY 0u -#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */ - -#if defined(MBEDTLS_SSL_ALPN) -#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN 1u -#else -#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN 0u -#endif /* MBEDTLS_SSL_ALPN */ - -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT 0 -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT 1 -#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT 2 -#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN_BIT 3 - -#define SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG \ - ( (uint32_t) ( \ - ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT ) | \ - ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT ) | \ - ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT ) | \ - ( SSL_SERIALIZED_CONTEXT_CONFIG_ALPN << SSL_SERIALIZED_CONTEXT_CONFIG_ALPN_BIT ) | \ - 0u ) ) - -static unsigned char ssl_serialized_context_header[] = { - MBEDTLS_VERSION_MAJOR, - MBEDTLS_VERSION_MINOR, - MBEDTLS_VERSION_PATCH, - ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 8 ) & 0xFF, - ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 0 ) & 0xFF, - ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 16 ) & 0xFF, - ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 8 ) & 0xFF, - ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 0 ) & 0xFF, -}; - -/* - * Serialize a full SSL context - * - * The format of the serialized data is: - * (in the presentation language of TLS, RFC 8446 section 3) - * - * // header - * opaque mbedtls_version[3]; // major, minor, patch - * opaque context_format[5]; // version-specific field determining - * // the format of the remaining - * // serialized data. - * Note: When updating the format, remember to keep these - * version+format bytes. (We may make their size part of the API.) - * - * // session sub-structure - * opaque session<1..2^32-1>; // see mbedtls_ssl_session_save() - * // transform sub-structure - * uint8 random[64]; // ServerHello.random+ClientHello.random - * uint8 in_cid<0..2^8-1> // Connection ID: expected incoming value - * uint8 out_cid<0..2^8-1> // Connection ID: outgoing value to use - * // fields from ssl_context - * uint32 badmac_seen; // DTLS: number of records with failing MAC - * uint64 in_window_top; // DTLS: last validated record seq_num - * uint64 in_window; // DTLS: bitmask for replay protection - * uint8 disable_datagram_packing; // DTLS: only one record per datagram - * uint64 cur_out_ctr; // Record layer: outgoing sequence number - * uint16 mtu; // DTLS: path mtu (max outgoing fragment size) - * uint8 alpn_chosen<0..2^8-1> // ALPN: negotiated application protocol - * - * Note that many fields of the ssl_context or sub-structures are not - * serialized, as they fall in one of the following categories: - * - * 1. forced value (eg in_left must be 0) - * 2. pointer to dynamically-allocated memory (eg session, transform) - * 3. value can be re-derived from other data (eg session keys from MS) - * 4. value was temporary (eg content of input buffer) - * 5. value will be provided by the user again (eg I/O callbacks and context) - */ -int mbedtls_ssl_context_save( mbedtls_ssl_context *ssl, - unsigned char *buf, - size_t buf_len, - size_t *olen ) -{ - unsigned char *p = buf; - size_t used = 0; - size_t session_len; - int ret = 0; - - /* - * Enforce usage restrictions, see "return BAD_INPUT_DATA" in - * this function's documentation. - * - * These are due to assumptions/limitations in the implementation. Some of - * them are likely to stay (no handshake in progress) some might go away - * (only DTLS) but are currently used to simplify the implementation. - */ - /* The initial handshake must be over */ - if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Initial handshake isn't over" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - if( ssl->handshake != NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Handshake isn't completed" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* Double-check that sub-structures are indeed ready */ - if( ssl->transform == NULL || ssl->session == NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Serialised structures aren't ready" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* There must be no pending incoming or outgoing data */ - if( mbedtls_ssl_check_pending( ssl ) != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "There is pending incoming data" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - if( ssl->out_left != 0 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "There is pending outgoing data" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* Protocol must be DLTS, not TLS */ - if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only DTLS is supported" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* Version must be 1.2 */ - if( ssl->major_ver != MBEDTLS_SSL_MAJOR_VERSION_3 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only version 1.2 supported" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only version 1.2 supported" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* We must be using an AEAD ciphersuite */ - if( mbedtls_ssl_transform_uses_aead( ssl->transform ) != 1 ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only AEAD ciphersuites supported" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - /* Renegotiation must not be enabled */ -#if defined(MBEDTLS_SSL_RENEGOTIATION) - if( ssl->conf->disable_renegotiation != MBEDTLS_SSL_RENEGOTIATION_DISABLED ) - { - MBEDTLS_SSL_DEBUG_MSG( 1, ( "Renegotiation must not be enabled" ) ); - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } -#endif - - /* - * Version and format identifier - */ - used += sizeof( ssl_serialized_context_header ); - - if( used <= buf_len ) - { - memcpy( p, ssl_serialized_context_header, - sizeof( ssl_serialized_context_header ) ); - p += sizeof( ssl_serialized_context_header ); - } - - /* - * Session (length + data) - */ - ret = ssl_session_save( ssl->session, 1, NULL, 0, &session_len ); - if( ret != MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ) - return( ret ); - - used += 4 + session_len; - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( session_len >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( session_len >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( session_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( session_len ) & 0xFF ); - - ret = ssl_session_save( ssl->session, 1, - p, session_len, &session_len ); - if( ret != 0 ) - return( ret ); - - p += session_len; - } - - /* - * Transform - */ - used += sizeof( ssl->transform->randbytes ); - if( used <= buf_len ) - { - memcpy( p, ssl->transform->randbytes, - sizeof( ssl->transform->randbytes ) ); - p += sizeof( ssl->transform->randbytes ); - } - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - used += 2 + ssl->transform->in_cid_len + ssl->transform->out_cid_len; - if( used <= buf_len ) - { - *p++ = ssl->transform->in_cid_len; - memcpy( p, ssl->transform->in_cid, ssl->transform->in_cid_len ); - p += ssl->transform->in_cid_len; - - *p++ = ssl->transform->out_cid_len; - memcpy( p, ssl->transform->out_cid, ssl->transform->out_cid_len ); - p += ssl->transform->out_cid_len; - } -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - - /* - * Saved fields from top-level ssl_context structure - */ -#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT) - used += 4; - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( ssl->badmac_seen >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->badmac_seen >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->badmac_seen >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->badmac_seen ) & 0xFF ); - } -#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */ - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) - used += 16; - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( ssl->in_window_top >> 56 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 48 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 40 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 32 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window_top ) & 0xFF ); - - *p++ = (unsigned char)( ( ssl->in_window >> 56 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 48 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 40 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 32 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 24 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 16 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->in_window ) & 0xFF ); - } -#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - used += 1; - if( used <= buf_len ) - { - *p++ = ssl->disable_datagram_packing; - } -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - - used += 8; - if( used <= buf_len ) - { - memcpy( p, ssl->cur_out_ctr, 8 ); - p += 8; - } - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - used += 2; - if( used <= buf_len ) - { - *p++ = (unsigned char)( ( ssl->mtu >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->mtu ) & 0xFF ); - } -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#if defined(MBEDTLS_SSL_ALPN) - { - const uint8_t alpn_len = ssl->alpn_chosen - ? (uint8_t) strlen( ssl->alpn_chosen ) - : 0; - - used += 1 + alpn_len; - if( used <= buf_len ) - { - *p++ = alpn_len; - - if( ssl->alpn_chosen != NULL ) - { - memcpy( p, ssl->alpn_chosen, alpn_len ); - p += alpn_len; - } - } - } -#endif /* MBEDTLS_SSL_ALPN */ - - /* - * Done - */ - *olen = used; - - if( used > buf_len ) - return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); - - MBEDTLS_SSL_DEBUG_BUF( 4, "saved context", buf, used ); - - return( mbedtls_ssl_session_reset_int( ssl, 0 ) ); -} - -/* - * Helper to get TLS 1.2 PRF from ciphersuite - * (Duplicates bits of logic from ssl_set_handshake_prfs().) - */ -typedef int (*tls_prf_fn)( const unsigned char *secret, size_t slen, - const char *label, - const unsigned char *random, size_t rlen, - unsigned char *dstbuf, size_t dlen ); -static tls_prf_fn ssl_tls12prf_from_cs( int ciphersuite_id ) -{ -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - const mbedtls_ssl_ciphersuite_t * const ciphersuite_info = - mbedtls_ssl_ciphersuite_from_id( ciphersuite_id ); - - if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 ) - return( tls_prf_sha384 ); -#else - (void) ciphersuite_id; -#endif - return( tls_prf_sha256 ); -} - -/* - * Deserialize context, see mbedtls_ssl_context_save() for format. - * - * This internal version is wrapped by a public function that cleans up in - * case of error. - */ -static int ssl_context_load( mbedtls_ssl_context *ssl, - const unsigned char *buf, - size_t len ) -{ - const unsigned char *p = buf; - const unsigned char * const end = buf + len; - size_t session_len; - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - /* - * The context should have been freshly setup or reset. - * Give the user an error in case of obvious misuse. - * (Checking session is useful because it won't be NULL if we're - * renegotiating, or if the user mistakenly loaded a session first.) - */ - if( ssl->state != MBEDTLS_SSL_HELLO_REQUEST || - ssl->session != NULL ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - /* - * We can't check that the config matches the initial one, but we can at - * least check it matches the requirements for serializing. - */ - if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM || - ssl->conf->max_major_ver < MBEDTLS_SSL_MAJOR_VERSION_3 || - ssl->conf->min_major_ver > MBEDTLS_SSL_MAJOR_VERSION_3 || - ssl->conf->max_minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 || - ssl->conf->min_minor_ver > MBEDTLS_SSL_MINOR_VERSION_3 || -#if defined(MBEDTLS_SSL_RENEGOTIATION) - ssl->conf->disable_renegotiation != MBEDTLS_SSL_RENEGOTIATION_DISABLED || -#endif - 0 ) - { - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - } - - MBEDTLS_SSL_DEBUG_BUF( 4, "context to load", buf, len ); - - /* - * Check version identifier - */ - if( (size_t)( end - p ) < sizeof( ssl_serialized_context_header ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - if( memcmp( p, ssl_serialized_context_header, - sizeof( ssl_serialized_context_header ) ) != 0 ) - { - return( MBEDTLS_ERR_SSL_VERSION_MISMATCH ); - } - p += sizeof( ssl_serialized_context_header ); - - /* - * Session - */ - if( (size_t)( end - p ) < 4 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - session_len = ( (size_t) p[0] << 24 ) | - ( (size_t) p[1] << 16 ) | - ( (size_t) p[2] << 8 ) | - ( (size_t) p[3] ); - p += 4; - - /* This has been allocated by ssl_handshake_init(), called by - * by either mbedtls_ssl_session_reset_int() or mbedtls_ssl_setup(). */ - ssl->session = ssl->session_negotiate; - ssl->session_in = ssl->session; - ssl->session_out = ssl->session; - ssl->session_negotiate = NULL; - - if( (size_t)( end - p ) < session_len ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ret = ssl_session_load( ssl->session, 1, p, session_len ); - if( ret != 0 ) - { - mbedtls_ssl_session_free( ssl->session ); - return( ret ); - } - - p += session_len; - - /* - * Transform - */ - - /* This has been allocated by ssl_handshake_init(), called by - * by either mbedtls_ssl_session_reset_int() or mbedtls_ssl_setup(). */ - ssl->transform = ssl->transform_negotiate; - ssl->transform_in = ssl->transform; - ssl->transform_out = ssl->transform; - ssl->transform_negotiate = NULL; - - /* Read random bytes and populate structure */ - if( (size_t)( end - p ) < sizeof( ssl->transform->randbytes ) ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ret = ssl_populate_transform( ssl->transform, - ssl->session->ciphersuite, - ssl->session->master, -#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - ssl->session->encrypt_then_mac, -#endif -#if defined(MBEDTLS_SSL_TRUNCATED_HMAC) - ssl->session->trunc_hmac, -#endif -#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ -#if defined(MBEDTLS_ZLIB_SUPPORT) - ssl->session->compression, -#endif - ssl_tls12prf_from_cs( ssl->session->ciphersuite ), - p, /* currently pointing to randbytes */ - MBEDTLS_SSL_MINOR_VERSION_3, /* (D)TLS 1.2 is forced */ - ssl->conf->endpoint, - ssl ); - if( ret != 0 ) - return( ret ); - - p += sizeof( ssl->transform->randbytes ); - -#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID) - /* Read connection IDs and store them */ - if( (size_t)( end - p ) < 1 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->transform->in_cid_len = *p++; - - if( (size_t)( end - p ) < ssl->transform->in_cid_len + 1u ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - memcpy( ssl->transform->in_cid, p, ssl->transform->in_cid_len ); - p += ssl->transform->in_cid_len; - - ssl->transform->out_cid_len = *p++; - - if( (size_t)( end - p ) < ssl->transform->out_cid_len ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - memcpy( ssl->transform->out_cid, p, ssl->transform->out_cid_len ); - p += ssl->transform->out_cid_len; -#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */ - - /* - * Saved fields from top-level ssl_context structure - */ -#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT) - if( (size_t)( end - p ) < 4 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->badmac_seen = ( (uint32_t) p[0] << 24 ) | - ( (uint32_t) p[1] << 16 ) | - ( (uint32_t) p[2] << 8 ) | - ( (uint32_t) p[3] ); - p += 4; -#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */ - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) - if( (size_t)( end - p ) < 16 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->in_window_top = ( (uint64_t) p[0] << 56 ) | - ( (uint64_t) p[1] << 48 ) | - ( (uint64_t) p[2] << 40 ) | - ( (uint64_t) p[3] << 32 ) | - ( (uint64_t) p[4] << 24 ) | - ( (uint64_t) p[5] << 16 ) | - ( (uint64_t) p[6] << 8 ) | - ( (uint64_t) p[7] ); - p += 8; - - ssl->in_window = ( (uint64_t) p[0] << 56 ) | - ( (uint64_t) p[1] << 48 ) | - ( (uint64_t) p[2] << 40 ) | - ( (uint64_t) p[3] << 32 ) | - ( (uint64_t) p[4] << 24 ) | - ( (uint64_t) p[5] << 16 ) | - ( (uint64_t) p[6] << 8 ) | - ( (uint64_t) p[7] ); - p += 8; -#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */ - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( (size_t)( end - p ) < 1 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->disable_datagram_packing = *p++; -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - - if( (size_t)( end - p ) < 8 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - memcpy( ssl->cur_out_ctr, p, 8 ); - p += 8; - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( (size_t)( end - p ) < 2 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - ssl->mtu = ( p[0] << 8 ) | p[1]; - p += 2; -#endif /* MBEDTLS_SSL_PROTO_DTLS */ - -#if defined(MBEDTLS_SSL_ALPN) - { - uint8_t alpn_len; - const char **cur; - - if( (size_t)( end - p ) < 1 ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - alpn_len = *p++; - - if( alpn_len != 0 && ssl->conf->alpn_list != NULL ) - { - /* alpn_chosen should point to an item in the configured list */ - for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ ) - { - if( strlen( *cur ) == alpn_len && - memcmp( p, cur, alpn_len ) == 0 ) - { - ssl->alpn_chosen = *cur; - break; - } - } - } - - /* can only happen on conf mismatch */ - if( alpn_len != 0 && ssl->alpn_chosen == NULL ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - p += alpn_len; - } -#endif /* MBEDTLS_SSL_ALPN */ - - /* - * Forced fields from top-level ssl_context structure - * - * Most of them already set to the correct value by mbedtls_ssl_init() and - * mbedtls_ssl_reset(), so we only need to set the remaining ones. - */ - ssl->state = MBEDTLS_SSL_HANDSHAKE_OVER; - - ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3; - ssl->minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; - - /* Adjust pointers for header fields of outgoing records to - * the given transform, accounting for explicit IV and CID. */ - mbedtls_ssl_update_out_pointers( ssl, ssl->transform ); - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - ssl->in_epoch = 1; -#endif - - /* mbedtls_ssl_reset() leaves the handshake sub-structure allocated, - * which we don't want - otherwise we'd end up freeing the wrong transform - * by calling mbedtls_ssl_handshake_wrapup_free_hs_transform() - * inappropriately. */ - if( ssl->handshake != NULL ) - { - mbedtls_ssl_handshake_free( ssl ); - mbedtls_free( ssl->handshake ); - ssl->handshake = NULL; - } - - /* - * Done - should have consumed entire buffer - */ - if( p != end ) - return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA ); - - return( 0 ); -} - -/* - * Deserialize context: public wrapper for error cleaning - */ -int mbedtls_ssl_context_load( mbedtls_ssl_context *context, - const unsigned char *buf, - size_t len ) -{ - int ret = ssl_context_load( context, buf, len ); - - if( ret != 0 ) - mbedtls_ssl_free( context ); - - return( ret ); -} -#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */ - -/* - * Free an SSL context - */ -void mbedtls_ssl_free( mbedtls_ssl_context *ssl ) -{ - if( ssl == NULL ) - return; - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> free" ) ); - - if( ssl->out_buf != NULL ) - { -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - size_t out_buf_len = ssl->out_buf_len; -#else - size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN; -#endif - - mbedtls_platform_zeroize( ssl->out_buf, out_buf_len ); - mbedtls_free( ssl->out_buf ); - ssl->out_buf = NULL; - } - - if( ssl->in_buf != NULL ) - { -#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH) - size_t in_buf_len = ssl->in_buf_len; -#else - size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN; -#endif - - mbedtls_platform_zeroize( ssl->in_buf, in_buf_len ); - mbedtls_free( ssl->in_buf ); - ssl->in_buf = NULL; - } - -#if defined(MBEDTLS_ZLIB_SUPPORT) - if( ssl->compress_buf != NULL ) - { - mbedtls_platform_zeroize( ssl->compress_buf, MBEDTLS_SSL_COMPRESS_BUFFER_LEN ); - mbedtls_free( ssl->compress_buf ); - } -#endif - - if( ssl->transform ) - { - mbedtls_ssl_transform_free( ssl->transform ); - mbedtls_free( ssl->transform ); - } - - if( ssl->handshake ) - { - mbedtls_ssl_handshake_free( ssl ); - mbedtls_ssl_transform_free( ssl->transform_negotiate ); - mbedtls_ssl_session_free( ssl->session_negotiate ); - - mbedtls_free( ssl->handshake ); - mbedtls_free( ssl->transform_negotiate ); - mbedtls_free( ssl->session_negotiate ); - } - - if( ssl->session ) - { - mbedtls_ssl_session_free( ssl->session ); - mbedtls_free( ssl->session ); - } - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - if( ssl->hostname != NULL ) - { - mbedtls_platform_zeroize( ssl->hostname, strlen( ssl->hostname ) ); - mbedtls_free( ssl->hostname ); - } -#endif - -#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL) - if( mbedtls_ssl_hw_record_finish != NULL ) - { - MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_finish()" ) ); - mbedtls_ssl_hw_record_finish( ssl ); - } -#endif - -#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C) - mbedtls_free( ssl->cli_id ); -#endif - - MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= free" ) ); - - /* Actually clear after last debug message */ - mbedtls_platform_zeroize( ssl, sizeof( mbedtls_ssl_context ) ); -} - -/* - * Initialze mbedtls_ssl_config - */ -void mbedtls_ssl_config_init( mbedtls_ssl_config *conf ) -{ - memset( conf, 0, sizeof( mbedtls_ssl_config ) ); -} - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -static int ssl_preset_default_hashes[] = { -#if defined(MBEDTLS_SHA512_C) - MBEDTLS_MD_SHA512, -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - MBEDTLS_MD_SHA384, -#endif -#if defined(MBEDTLS_SHA256_C) - MBEDTLS_MD_SHA256, - MBEDTLS_MD_SHA224, -#endif -#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE) - MBEDTLS_MD_SHA1, -#endif - MBEDTLS_MD_NONE -}; -#endif - -static int ssl_preset_suiteb_ciphersuites[] = { - MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, - MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, - 0 -}; - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -static int ssl_preset_suiteb_hashes[] = { - MBEDTLS_MD_SHA256, - MBEDTLS_MD_SHA384, - MBEDTLS_MD_NONE -}; -#endif - -#if defined(MBEDTLS_ECP_C) -static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = { -#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) - MBEDTLS_ECP_DP_SECP256R1, -#endif -#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED) - MBEDTLS_ECP_DP_SECP384R1, -#endif - MBEDTLS_ECP_DP_NONE -}; -#endif - -/* - * Load default in mbedtls_ssl_config - */ -int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf, - int endpoint, int transport, int preset ) -{ -#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C) - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; -#endif - - /* Use the functions here so that they are covered in tests, - * but otherwise access member directly for efficiency */ - mbedtls_ssl_conf_endpoint( conf, endpoint ); - mbedtls_ssl_conf_transport( conf, transport ); - - /* - * Things that are common to all presets - */ -#if defined(MBEDTLS_SSL_CLI_C) - if( endpoint == MBEDTLS_SSL_IS_CLIENT ) - { - conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED; -#if defined(MBEDTLS_SSL_SESSION_TICKETS) - conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED; -#endif - } -#endif - -#if defined(MBEDTLS_ARC4_C) - conf->arc4_disabled = MBEDTLS_SSL_ARC4_DISABLED; -#endif - -#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) - conf->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED; -#endif - -#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) - conf->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED; -#endif - -#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING) - conf->cbc_record_splitting = MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED; -#endif - -#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C) - conf->f_cookie_write = ssl_cookie_write_dummy; - conf->f_cookie_check = ssl_cookie_check_dummy; -#endif - -#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY) - conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED; -#endif - -#if defined(MBEDTLS_SSL_SRV_C) - conf->cert_req_ca_list = MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED; -#endif - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN; - conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX; -#endif - -#if defined(MBEDTLS_SSL_RENEGOTIATION) - conf->renego_max_records = MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT; - memset( conf->renego_period, 0x00, 2 ); - memset( conf->renego_period + 2, 0xFF, 6 ); -#endif - -#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C) - if( endpoint == MBEDTLS_SSL_IS_SERVER ) - { - const unsigned char dhm_p[] = - MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN; - const unsigned char dhm_g[] = - MBEDTLS_DHM_RFC3526_MODP_2048_G_BIN; - - if ( ( ret = mbedtls_ssl_conf_dh_param_bin( conf, - dhm_p, sizeof( dhm_p ), - dhm_g, sizeof( dhm_g ) ) ) != 0 ) - { - return( ret ); - } - } -#endif - - /* - * Preset-specific defaults - */ - switch( preset ) - { - /* - * NSA Suite B - */ - case MBEDTLS_SSL_PRESET_SUITEB: - conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3; - conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */ - conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION; - conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION; - - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = - ssl_preset_suiteb_ciphersuites; - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - conf->cert_profile = &mbedtls_x509_crt_profile_suiteb; -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - conf->sig_hashes = ssl_preset_suiteb_hashes; -#endif - -#if defined(MBEDTLS_ECP_C) - conf->curve_list = ssl_preset_suiteb_curves; -#endif - break; - - /* - * Default - */ - default: - conf->min_major_ver = ( MBEDTLS_SSL_MIN_MAJOR_VERSION > - MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION ) ? - MBEDTLS_SSL_MIN_MAJOR_VERSION : - MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION; - conf->min_minor_ver = ( MBEDTLS_SSL_MIN_MINOR_VERSION > - MBEDTLS_SSL_MIN_VALID_MINOR_VERSION ) ? - MBEDTLS_SSL_MIN_MINOR_VERSION : - MBEDTLS_SSL_MIN_VALID_MINOR_VERSION; - conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION; - conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION; - -#if defined(MBEDTLS_SSL_PROTO_DTLS) - if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM ) - conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_2; -#endif - - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = - conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = - mbedtls_ssl_list_ciphersuites(); - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - conf->cert_profile = &mbedtls_x509_crt_profile_default; -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - conf->sig_hashes = ssl_preset_default_hashes; -#endif - -#if defined(MBEDTLS_ECP_C) - conf->curve_list = mbedtls_ecp_grp_id_list(); -#endif - -#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C) - conf->dhm_min_bitlen = 1024; -#endif - } - - return( 0 ); -} - -/* - * Free mbedtls_ssl_config - */ -void mbedtls_ssl_config_free( mbedtls_ssl_config *conf ) -{ -#if defined(MBEDTLS_DHM_C) - mbedtls_mpi_free( &conf->dhm_P ); - mbedtls_mpi_free( &conf->dhm_G ); -#endif - -#if defined(MBEDTLS_KEY_EXCHANGE_SOME_PSK_ENABLED) - if( conf->psk != NULL ) - { - mbedtls_platform_zeroize( conf->psk, conf->psk_len ); - mbedtls_free( conf->psk ); - conf->psk = NULL; - conf->psk_len = 0; - } - - if( conf->psk_identity != NULL ) - { - mbedtls_platform_zeroize( conf->psk_identity, conf->psk_identity_len ); - mbedtls_free( conf->psk_identity ); - conf->psk_identity = NULL; - conf->psk_identity_len = 0; - } -#endif - -#if defined(MBEDTLS_X509_CRT_PARSE_C) - ssl_key_cert_free( conf->key_cert ); -#endif - - mbedtls_platform_zeroize( conf, sizeof( mbedtls_ssl_config ) ); -} - -#if defined(MBEDTLS_PK_C) && \ - ( defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECDSA_C) ) -/* - * Convert between MBEDTLS_PK_XXX and SSL_SIG_XXX - */ -unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk ) -{ -#if defined(MBEDTLS_RSA_C) - if( mbedtls_pk_can_do( pk, MBEDTLS_PK_RSA ) ) - return( MBEDTLS_SSL_SIG_RSA ); -#endif -#if defined(MBEDTLS_ECDSA_C) - if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECDSA ) ) - return( MBEDTLS_SSL_SIG_ECDSA ); -#endif - return( MBEDTLS_SSL_SIG_ANON ); -} - -unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type ) -{ - switch( type ) { - case MBEDTLS_PK_RSA: - return( MBEDTLS_SSL_SIG_RSA ); - case MBEDTLS_PK_ECDSA: - case MBEDTLS_PK_ECKEY: - return( MBEDTLS_SSL_SIG_ECDSA ); - default: - return( MBEDTLS_SSL_SIG_ANON ); - } -} - -mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig ) -{ - switch( sig ) - { -#if defined(MBEDTLS_RSA_C) - case MBEDTLS_SSL_SIG_RSA: - return( MBEDTLS_PK_RSA ); -#endif -#if defined(MBEDTLS_ECDSA_C) - case MBEDTLS_SSL_SIG_ECDSA: - return( MBEDTLS_PK_ECDSA ); -#endif - default: - return( MBEDTLS_PK_NONE ); - } -} -#endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C || MBEDTLS_ECDSA_C ) */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ - defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) - -/* Find an entry in a signature-hash set matching a given hash algorithm. */ -mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_pk_type_t sig_alg ) -{ - switch( sig_alg ) - { - case MBEDTLS_PK_RSA: - return( set->rsa ); - case MBEDTLS_PK_ECDSA: - return( set->ecdsa ); - default: - return( MBEDTLS_MD_NONE ); - } -} - -/* Add a signature-hash-pair to a signature-hash set */ -void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_pk_type_t sig_alg, - mbedtls_md_type_t md_alg ) -{ - switch( sig_alg ) - { - case MBEDTLS_PK_RSA: - if( set->rsa == MBEDTLS_MD_NONE ) - set->rsa = md_alg; - break; - - case MBEDTLS_PK_ECDSA: - if( set->ecdsa == MBEDTLS_MD_NONE ) - set->ecdsa = md_alg; - break; - - default: - break; - } -} - -/* Allow exactly one hash algorithm for each signature. */ -void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set, - mbedtls_md_type_t md_alg ) -{ - set->rsa = md_alg; - set->ecdsa = md_alg; -} - -#endif /* MBEDTLS_SSL_PROTO_TLS1_2) && - MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -/* - * Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX - */ -mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash ) -{ - switch( hash ) - { -#if defined(MBEDTLS_MD5_C) - case MBEDTLS_SSL_HASH_MD5: - return( MBEDTLS_MD_MD5 ); -#endif -#if defined(MBEDTLS_SHA1_C) - case MBEDTLS_SSL_HASH_SHA1: - return( MBEDTLS_MD_SHA1 ); -#endif -#if defined(MBEDTLS_SHA256_C) - case MBEDTLS_SSL_HASH_SHA224: - return( MBEDTLS_MD_SHA224 ); - case MBEDTLS_SSL_HASH_SHA256: - return( MBEDTLS_MD_SHA256 ); -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - case MBEDTLS_SSL_HASH_SHA384: - return( MBEDTLS_MD_SHA384 ); -#endif -#if defined(MBEDTLS_SHA512_C) - case MBEDTLS_SSL_HASH_SHA512: - return( MBEDTLS_MD_SHA512 ); -#endif - default: - return( MBEDTLS_MD_NONE ); - } -} - -/* - * Convert from MBEDTLS_MD_XXX to MBEDTLS_SSL_HASH_XXX - */ -unsigned char mbedtls_ssl_hash_from_md_alg( int md ) -{ - switch( md ) - { -#if defined(MBEDTLS_MD5_C) - case MBEDTLS_MD_MD5: - return( MBEDTLS_SSL_HASH_MD5 ); -#endif -#if defined(MBEDTLS_SHA1_C) - case MBEDTLS_MD_SHA1: - return( MBEDTLS_SSL_HASH_SHA1 ); -#endif -#if defined(MBEDTLS_SHA256_C) - case MBEDTLS_MD_SHA224: - return( MBEDTLS_SSL_HASH_SHA224 ); - case MBEDTLS_MD_SHA256: - return( MBEDTLS_SSL_HASH_SHA256 ); -#endif -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - case MBEDTLS_MD_SHA384: - return( MBEDTLS_SSL_HASH_SHA384 ); -#endif -#if defined(MBEDTLS_SHA512_C) - case MBEDTLS_MD_SHA512: - return( MBEDTLS_SSL_HASH_SHA512 ); -#endif - default: - return( MBEDTLS_SSL_HASH_NONE ); - } -} - -#if defined(MBEDTLS_ECP_C) -/* - * Check if a curve proposed by the peer is in our list. - * Return 0 if we're willing to use it, -1 otherwise. - */ -int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id ) -{ - const mbedtls_ecp_group_id *gid; - - if( ssl->conf->curve_list == NULL ) - return( -1 ); - - for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ ) - if( *gid == grp_id ) - return( 0 ); - - return( -1 ); -} -#endif /* MBEDTLS_ECP_C */ - -#if defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED) -/* - * Check if a hash proposed by the peer is in our list. - * Return 0 if we're willing to use it, -1 otherwise. - */ -int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl, - mbedtls_md_type_t md ) -{ - const int *cur; - - if( ssl->conf->sig_hashes == NULL ) - return( -1 ); - - for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ ) - if( *cur == (int) md ) - return( 0 ); - - return( -1 ); -} -#endif /* MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED */ - -#if defined(MBEDTLS_X509_CRT_PARSE_C) -int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert, - const mbedtls_ssl_ciphersuite_t *ciphersuite, - int cert_endpoint, - uint32_t *flags ) -{ - int ret = 0; -#if defined(MBEDTLS_X509_CHECK_KEY_USAGE) - int usage = 0; -#endif -#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE) - const char *ext_oid; - size_t ext_len; -#endif - -#if !defined(MBEDTLS_X509_CHECK_KEY_USAGE) && \ - !defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE) - ((void) cert); - ((void) cert_endpoint); - ((void) flags); -#endif - -#if defined(MBEDTLS_X509_CHECK_KEY_USAGE) - if( cert_endpoint == MBEDTLS_SSL_IS_SERVER ) - { - /* Server part of the key exchange */ - switch( ciphersuite->key_exchange ) - { - case MBEDTLS_KEY_EXCHANGE_RSA: - case MBEDTLS_KEY_EXCHANGE_RSA_PSK: - usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT; - break; - - case MBEDTLS_KEY_EXCHANGE_DHE_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA: - usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; - break; - - case MBEDTLS_KEY_EXCHANGE_ECDH_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA: - usage = MBEDTLS_X509_KU_KEY_AGREEMENT; - break; - - /* Don't use default: we want warnings when adding new values */ - case MBEDTLS_KEY_EXCHANGE_NONE: - case MBEDTLS_KEY_EXCHANGE_PSK: - case MBEDTLS_KEY_EXCHANGE_DHE_PSK: - case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK: - case MBEDTLS_KEY_EXCHANGE_ECJPAKE: - usage = 0; - } - } - else - { - /* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */ - usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; - } - - if( mbedtls_x509_crt_check_key_usage( cert, usage ) != 0 ) - { - *flags |= MBEDTLS_X509_BADCERT_KEY_USAGE; - ret = -1; - } -#else - ((void) ciphersuite); -#endif /* MBEDTLS_X509_CHECK_KEY_USAGE */ - -#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE) - if( cert_endpoint == MBEDTLS_SSL_IS_SERVER ) - { - ext_oid = MBEDTLS_OID_SERVER_AUTH; - ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH ); - } - else - { - ext_oid = MBEDTLS_OID_CLIENT_AUTH; - ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_CLIENT_AUTH ); - } - - if( mbedtls_x509_crt_check_extended_key_usage( cert, ext_oid, ext_len ) != 0 ) - { - *flags |= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE; - ret = -1; - } -#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */ - - return( ret ); -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - -int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md ) -{ -#if defined(MBEDTLS_SSL_PROTO_TLS1_2) - if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 ) - return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH; - - switch( md ) - { -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) -#if defined(MBEDTLS_MD5_C) - case MBEDTLS_SSL_HASH_MD5: - return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH; -#endif -#if defined(MBEDTLS_SHA1_C) - case MBEDTLS_SSL_HASH_SHA1: - ssl->handshake->calc_verify = ssl_calc_verify_tls; - break; -#endif -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */ -#if defined(MBEDTLS_SHA512_C) && !defined(MBEDTLS_SHA512_NO_SHA384) - case MBEDTLS_SSL_HASH_SHA384: - ssl->handshake->calc_verify = ssl_calc_verify_tls_sha384; - break; -#endif -#if defined(MBEDTLS_SHA256_C) - case MBEDTLS_SSL_HASH_SHA256: - ssl->handshake->calc_verify = ssl_calc_verify_tls_sha256; - break; -#endif - default: - return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH; - } - - return 0; -#else /* !MBEDTLS_SSL_PROTO_TLS1_2 */ - (void) ssl; - (void) md; - - return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH; -#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */ -} - -#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_1) -int mbedtls_ssl_get_key_exchange_md_ssl_tls( mbedtls_ssl_context *ssl, - unsigned char *output, - unsigned char *data, size_t data_len ) -{ - int ret = 0; - mbedtls_md5_context mbedtls_md5; - mbedtls_sha1_context mbedtls_sha1; - - mbedtls_md5_init( &mbedtls_md5 ); - mbedtls_sha1_init( &mbedtls_sha1 ); - - /* - * digitally-signed struct { - * opaque md5_hash[16]; - * opaque sha_hash[20]; - * }; - * - * md5_hash - * MD5(ClientHello.random + ServerHello.random - * + ServerParams); - * sha_hash - * SHA(ClientHello.random + ServerHello.random - * + ServerParams); - */ - if( ( ret = mbedtls_md5_starts_ret( &mbedtls_md5 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_starts_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_md5_update_ret( &mbedtls_md5, - ssl->handshake->randbytes, 64 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_update_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_md5_update_ret( &mbedtls_md5, data, data_len ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_update_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_md5_finish_ret( &mbedtls_md5, output ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_finish_ret", ret ); - goto exit; - } - - if( ( ret = mbedtls_sha1_starts_ret( &mbedtls_sha1 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_starts_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_sha1_update_ret( &mbedtls_sha1, - ssl->handshake->randbytes, 64 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_update_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_sha1_update_ret( &mbedtls_sha1, data, - data_len ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_update_ret", ret ); - goto exit; - } - if( ( ret = mbedtls_sha1_finish_ret( &mbedtls_sha1, - output + 16 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_finish_ret", ret ); - goto exit; - } - -exit: - mbedtls_md5_free( &mbedtls_md5 ); - mbedtls_sha1_free( &mbedtls_sha1 ); - - if( ret != 0 ) - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR ); - - return( ret ); - -} -#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \ - MBEDTLS_SSL_PROTO_TLS1_1 */ - -#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \ - defined(MBEDTLS_SSL_PROTO_TLS1_2) - -#if defined(MBEDTLS_USE_PSA_CRYPTO) -int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl, - unsigned char *hash, size_t *hashlen, - unsigned char *data, size_t data_len, - mbedtls_md_type_t md_alg ) -{ - psa_status_t status; - psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT; - psa_algorithm_t hash_alg = mbedtls_psa_translate_md( md_alg ); - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Perform PSA-based computation of digest of ServerKeyExchange" ) ); - - if( ( status = psa_hash_setup( &hash_operation, - hash_alg ) ) != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_setup", status ); - goto exit; - } - - if( ( status = psa_hash_update( &hash_operation, ssl->handshake->randbytes, - 64 ) ) != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_update", status ); - goto exit; - } - - if( ( status = psa_hash_update( &hash_operation, - data, data_len ) ) != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_update", status ); - goto exit; - } - - if( ( status = psa_hash_finish( &hash_operation, hash, MBEDTLS_MD_MAX_SIZE, - hashlen ) ) != PSA_SUCCESS ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_finish", status ); - goto exit; - } - -exit: - if( status != PSA_SUCCESS ) - { - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR ); - switch( status ) - { - case PSA_ERROR_NOT_SUPPORTED: - return( MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE ); - case PSA_ERROR_BAD_STATE: /* Intentional fallthrough */ - case PSA_ERROR_BUFFER_TOO_SMALL: - return( MBEDTLS_ERR_MD_BAD_INPUT_DATA ); - case PSA_ERROR_INSUFFICIENT_MEMORY: - return( MBEDTLS_ERR_MD_ALLOC_FAILED ); - default: - return( MBEDTLS_ERR_MD_HW_ACCEL_FAILED ); - } - } - return( 0 ); -} - -#else - -int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl, - unsigned char *hash, size_t *hashlen, - unsigned char *data, size_t data_len, - mbedtls_md_type_t md_alg ) -{ - int ret = 0; - mbedtls_md_context_t ctx; - const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg ); - *hashlen = mbedtls_md_get_size( md_info ); - - MBEDTLS_SSL_DEBUG_MSG( 3, ( "Perform mbedtls-based computation of digest of ServerKeyExchange" ) ); - - mbedtls_md_init( &ctx ); - - /* - * digitally-signed struct { - * opaque client_random[32]; - * opaque server_random[32]; - * ServerDHParams params; - * }; - */ - if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret ); - goto exit; - } - if( ( ret = mbedtls_md_starts( &ctx ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_starts", ret ); - goto exit; - } - if( ( ret = mbedtls_md_update( &ctx, ssl->handshake->randbytes, 64 ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_update", ret ); - goto exit; - } - if( ( ret = mbedtls_md_update( &ctx, data, data_len ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_update", ret ); - goto exit; - } - if( ( ret = mbedtls_md_finish( &ctx, hash ) ) != 0 ) - { - MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_finish", ret ); - goto exit; - } - -exit: - mbedtls_md_free( &ctx ); - - if( ret != 0 ) - mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR ); - - return( ret ); -} -#endif /* MBEDTLS_USE_PSA_CRYPTO */ - -#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \ - MBEDTLS_SSL_PROTO_TLS1_2 */ - -#endif /* MBEDTLS_SSL_TLS_C */ |