| /* BEGIN_HEADER */ |
| #include <mbedtls/ssl.h> |
| #include <mbedtls/ssl_internal.h> |
| |
| /* |
| * Helper function setting up inverse record transformations |
| * using given cipher, hash, EtM mode, authentication tag length, |
| * and version. |
| */ |
| |
| #define CHK( x ) \ |
| do \ |
| { \ |
| if( !( x ) ) \ |
| { \ |
| ret = -1; \ |
| goto cleanup; \ |
| } \ |
| } while( 0 ) |
| |
| |
| static int build_transforms( mbedtls_ssl_transform *t_in, |
| mbedtls_ssl_transform *t_out, |
| int cipher_type, int hash_id, |
| int etm, int tag_mode, int ver ) |
| { |
| mbedtls_cipher_info_t const *cipher_info; |
| int ret = 0; |
| |
| size_t keylen, maclen, ivlen; |
| unsigned char *key0 = NULL, *key1 = NULL; |
| unsigned char iv_enc[16], iv_dec[16]; |
| |
| maclen = 0; |
| |
| /* Pick cipher */ |
| cipher_info = mbedtls_cipher_info_from_type( cipher_type ); |
| CHK( cipher_info != NULL ); |
| CHK( cipher_info->iv_size <= 16 ); |
| CHK( cipher_info->key_bitlen % 8 == 0 ); |
| |
| /* Pick keys */ |
| keylen = cipher_info->key_bitlen / 8; |
| /* Allocate `keylen + 1` bytes to ensure that we get |
| * a non-NULL pointers from `mbedtls_calloc` even if |
| * `keylen == 0` in the case of the NULL cipher. */ |
| CHK( ( key0 = mbedtls_calloc( 1, keylen + 1 ) ) != NULL ); |
| CHK( ( key1 = mbedtls_calloc( 1, keylen + 1 ) ) != NULL ); |
| memset( key0, 0x1, keylen ); |
| memset( key1, 0x2, keylen ); |
| |
| /* Setup cipher contexts */ |
| CHK( mbedtls_cipher_setup( &t_in->cipher_ctx_enc, cipher_info ) == 0 ); |
| CHK( mbedtls_cipher_setup( &t_in->cipher_ctx_dec, cipher_info ) == 0 ); |
| CHK( mbedtls_cipher_setup( &t_out->cipher_ctx_enc, cipher_info ) == 0 ); |
| CHK( mbedtls_cipher_setup( &t_out->cipher_ctx_dec, cipher_info ) == 0 ); |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| if( cipher_info->mode == MBEDTLS_MODE_CBC ) |
| { |
| CHK( mbedtls_cipher_set_padding_mode( &t_in->cipher_ctx_enc, |
| MBEDTLS_PADDING_NONE ) == 0 ); |
| CHK( mbedtls_cipher_set_padding_mode( &t_in->cipher_ctx_dec, |
| MBEDTLS_PADDING_NONE ) == 0 ); |
| CHK( mbedtls_cipher_set_padding_mode( &t_out->cipher_ctx_enc, |
| MBEDTLS_PADDING_NONE ) == 0 ); |
| CHK( mbedtls_cipher_set_padding_mode( &t_out->cipher_ctx_dec, |
| MBEDTLS_PADDING_NONE ) == 0 ); |
| } |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| CHK( mbedtls_cipher_setkey( &t_in->cipher_ctx_enc, key0, |
| keylen << 3, MBEDTLS_ENCRYPT ) == 0 ); |
| CHK( mbedtls_cipher_setkey( &t_in->cipher_ctx_dec, key1, |
| keylen << 3, MBEDTLS_DECRYPT ) == 0 ); |
| CHK( mbedtls_cipher_setkey( &t_out->cipher_ctx_enc, key1, |
| keylen << 3, MBEDTLS_ENCRYPT ) == 0 ); |
| CHK( mbedtls_cipher_setkey( &t_out->cipher_ctx_dec, key0, |
| keylen << 3, MBEDTLS_DECRYPT ) == 0 ); |
| |
| /* Setup MAC contexts */ |
| #if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC) |
| if( cipher_info->mode == MBEDTLS_MODE_CBC || |
| cipher_info->mode == MBEDTLS_MODE_STREAM ) |
| { |
| mbedtls_md_info_t const *md_info; |
| unsigned char *md0, *md1; |
| |
| /* Pick hash */ |
| md_info = mbedtls_md_info_from_type( hash_id ); |
| CHK( md_info != NULL ); |
| |
| /* Pick hash keys */ |
| maclen = mbedtls_md_get_size( md_info ); |
| CHK( ( md0 = mbedtls_calloc( 1, maclen ) ) != NULL ); |
| CHK( ( md1 = mbedtls_calloc( 1, maclen ) ) != NULL ); |
| memset( md0, 0x5, maclen ); |
| memset( md1, 0x6, maclen ); |
| |
| CHK( mbedtls_md_setup( &t_out->md_ctx_enc, md_info, 1 ) == 0 ); |
| CHK( mbedtls_md_setup( &t_out->md_ctx_dec, md_info, 1 ) == 0 ); |
| CHK( mbedtls_md_setup( &t_in->md_ctx_enc, md_info, 1 ) == 0 ); |
| CHK( mbedtls_md_setup( &t_in->md_ctx_dec, md_info, 1 ) == 0 ); |
| |
| if( ver > MBEDTLS_SSL_MINOR_VERSION_0 ) |
| { |
| CHK( mbedtls_md_hmac_starts( &t_in->md_ctx_enc, |
| md0, maclen ) == 0 ); |
| CHK( mbedtls_md_hmac_starts( &t_in->md_ctx_dec, |
| md1, maclen ) == 0 ); |
| CHK( mbedtls_md_hmac_starts( &t_out->md_ctx_enc, |
| md1, maclen ) == 0 ); |
| CHK( mbedtls_md_hmac_starts( &t_out->md_ctx_dec, |
| md0, maclen ) == 0 ); |
| } |
| #if defined(MBEDTLS_SSL_PROTO_SSL3) |
| else |
| { |
| memcpy( &t_in->mac_enc, md0, maclen ); |
| memcpy( &t_in->mac_dec, md1, maclen ); |
| memcpy( &t_out->mac_enc, md1, maclen ); |
| memcpy( &t_out->mac_dec, md0, maclen ); |
| } |
| #endif |
| |
| mbedtls_free( md0 ); |
| mbedtls_free( md1 ); |
| } |
| #else |
| ((void) hash_id); |
| #endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */ |
| |
| |
| /* Pick IV's (regardless of whether they |
| * are being used by the transform). */ |
| ivlen = cipher_info->iv_size; |
| memset( iv_enc, 0x3, sizeof( iv_enc ) ); |
| memset( iv_dec, 0x4, sizeof( iv_dec ) ); |
| |
| /* |
| * Setup transforms |
| */ |
| |
| #if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) |
| t_out->encrypt_then_mac = etm; |
| t_in->encrypt_then_mac = etm; |
| #else |
| ((void) etm); |
| #endif |
| |
| t_out->minor_ver = ver; |
| t_in->minor_ver = ver; |
| t_out->ivlen = ivlen; |
| t_in->ivlen = ivlen; |
| |
| switch( cipher_info->mode ) |
| { |
| case MBEDTLS_MODE_GCM: |
| case MBEDTLS_MODE_CCM: |
| t_out->fixed_ivlen = 4; |
| t_in->fixed_ivlen = 4; |
| t_out->maclen = 0; |
| t_in->maclen = 0; |
| switch( tag_mode ) |
| { |
| case 0: /* Full tag */ |
| t_out->taglen = 16; |
| t_in->taglen = 16; |
| break; |
| case 1: /* Partial tag */ |
| t_out->taglen = 8; |
| t_in->taglen = 8; |
| break; |
| default: |
| return( 1 ); |
| } |
| break; |
| |
| case MBEDTLS_MODE_CHACHAPOLY: |
| t_out->fixed_ivlen = 12; |
| t_in->fixed_ivlen = 12; |
| t_out->maclen = 0; |
| t_in->maclen = 0; |
| switch( tag_mode ) |
| { |
| case 0: /* Full tag */ |
| t_out->taglen = 16; |
| t_in->taglen = 16; |
| break; |
| case 1: /* Partial tag */ |
| t_out->taglen = 8; |
| t_in->taglen = 8; |
| break; |
| default: |
| return( 1 ); |
| } |
| break; |
| |
| case MBEDTLS_MODE_STREAM: |
| case MBEDTLS_MODE_CBC: |
| t_out->fixed_ivlen = 0; /* redundant, must be 0 */ |
| t_in->fixed_ivlen = 0; /* redundant, must be 0 */ |
| t_out->taglen = 0; |
| t_in->taglen = 0; |
| switch( tag_mode ) |
| { |
| case 0: /* Full tag */ |
| t_out->maclen = maclen; |
| t_in->maclen = maclen; |
| break; |
| case 1: /* Partial tag */ |
| t_out->maclen = 10; |
| t_in->maclen = 10; |
| break; |
| default: |
| return( 1 ); |
| } |
| break; |
| default: |
| return( 1 ); |
| break; |
| } |
| |
| /* Setup IV's */ |
| |
| memcpy( &t_in->iv_dec, iv_dec, sizeof( iv_dec ) ); |
| memcpy( &t_in->iv_enc, iv_enc, sizeof( iv_enc ) ); |
| memcpy( &t_out->iv_dec, iv_enc, sizeof( iv_enc ) ); |
| memcpy( &t_out->iv_enc, iv_dec, sizeof( iv_dec ) ); |
| |
| cleanup: |
| |
| mbedtls_free( key0 ); |
| mbedtls_free( key1 ); |
| |
| return( ret ); |
| } |
| |
| /* END_HEADER */ |
| |
| /* BEGIN_DEPENDENCIES |
| * depends_on:MBEDTLS_SSL_TLS_C |
| * END_DEPENDENCIES |
| */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_SSL_DTLS_ANTI_REPLAY */ |
| void ssl_dtls_replay( data_t * prevs, data_t * new, int ret ) |
| { |
| uint32_t len = 0; |
| mbedtls_ssl_context ssl; |
| mbedtls_ssl_config conf; |
| |
| mbedtls_ssl_init( &ssl ); |
| mbedtls_ssl_config_init( &conf ); |
| |
| TEST_ASSERT( mbedtls_ssl_config_defaults( &conf, |
| MBEDTLS_SSL_IS_CLIENT, |
| MBEDTLS_SSL_TRANSPORT_DATAGRAM, |
| MBEDTLS_SSL_PRESET_DEFAULT ) == 0 ); |
| TEST_ASSERT( mbedtls_ssl_setup( &ssl, &conf ) == 0 ); |
| |
| /* Read previous record numbers */ |
| for( len = 0; len < prevs->len; len += 6 ) |
| { |
| memcpy( ssl.in_ctr + 2, prevs->x + len, 6 ); |
| mbedtls_ssl_dtls_replay_update( &ssl ); |
| } |
| |
| /* Check new number */ |
| memcpy( ssl.in_ctr + 2, new->x, 6 ); |
| TEST_ASSERT( mbedtls_ssl_dtls_replay_check( &ssl ) == ret ); |
| |
| mbedtls_ssl_free( &ssl ); |
| mbedtls_ssl_config_free( &conf ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C */ |
| void ssl_set_hostname_twice( char *hostname0, char *hostname1 ) |
| { |
| mbedtls_ssl_context ssl; |
| mbedtls_ssl_init( &ssl ); |
| |
| TEST_ASSERT( mbedtls_ssl_set_hostname( &ssl, hostname0 ) == 0 ); |
| TEST_ASSERT( mbedtls_ssl_set_hostname( &ssl, hostname1 ) == 0 ); |
| |
| mbedtls_ssl_free( &ssl ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ssl_crypt_record( int cipher_type, int hash_id, |
| int etm, int tag_mode, int ver ) |
| { |
| /* |
| * Test several record encryptions and decryptions |
| * with plenty of space before and after the data |
| * within the record buffer. |
| */ |
| |
| int ret; |
| int num_records = 16; |
| mbedtls_ssl_context ssl; /* ONLY for debugging */ |
| |
| mbedtls_ssl_transform t0, t1; |
| unsigned char *buf = NULL; |
| size_t const buflen = 512; |
| mbedtls_record rec, rec_backup; |
| |
| mbedtls_ssl_init( &ssl ); |
| mbedtls_ssl_transform_init( &t0 ); |
| mbedtls_ssl_transform_init( &t1 ); |
| TEST_ASSERT( build_transforms( &t0, &t1, cipher_type, hash_id, |
| etm, tag_mode, ver ) == 0 ); |
| |
| TEST_ASSERT( ( buf = mbedtls_calloc( 1, buflen ) ) != NULL ); |
| |
| while( num_records-- > 0 ) |
| { |
| mbedtls_ssl_transform *t_dec, *t_enc; |
| /* Take turns in who's sending and who's receiving. */ |
| if( num_records % 3 == 0 ) |
| { |
| t_dec = &t0; |
| t_enc = &t1; |
| } |
| else |
| { |
| t_dec = &t1; |
| t_enc = &t0; |
| } |
| |
| /* |
| * The record header affects the transformation in two ways: |
| * 1) It determines the AEAD additional data |
| * 2) The record counter sometimes determines the IV. |
| * |
| * Apart from that, the fields don't have influence. |
| * In particular, it is currently not the responsibility |
| * of ssl_encrypt/decrypt_buf to check if the transform |
| * version matches the record version, or that the |
| * type is sensible. |
| */ |
| |
| memset( rec.ctr, num_records, sizeof( rec.ctr ) ); |
| rec.type = 42; |
| rec.ver[0] = num_records; |
| rec.ver[1] = num_records; |
| |
| rec.buf = buf; |
| rec.buf_len = buflen; |
| rec.data_offset = 16; |
| /* Make sure to vary the length to exercise different |
| * paddings. */ |
| rec.data_len = 1 + num_records; |
| |
| memset( rec.buf + rec.data_offset, 42, rec.data_len ); |
| |
| /* Make a copy for later comparison */ |
| rec_backup = rec; |
| |
| /* Encrypt record */ |
| ret = mbedtls_ssl_encrypt_buf( &ssl, t_enc, &rec, |
| rnd_std_rand, NULL ); |
| TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); |
| if( ret != 0 ) |
| { |
| continue; |
| } |
| |
| /* Decrypt record with t_dec */ |
| TEST_ASSERT( mbedtls_ssl_decrypt_buf( &ssl, t_dec, &rec ) == 0 ); |
| |
| /* Compare results */ |
| TEST_ASSERT( rec.type == rec_backup.type ); |
| TEST_ASSERT( memcmp( rec.ctr, rec_backup.ctr, 8 ) == 0 ); |
| TEST_ASSERT( rec.ver[0] == rec_backup.ver[0] ); |
| TEST_ASSERT( rec.ver[1] == rec_backup.ver[1] ); |
| TEST_ASSERT( rec.data_len == rec_backup.data_len ); |
| TEST_ASSERT( rec.data_offset == rec_backup.data_offset ); |
| TEST_ASSERT( memcmp( rec.buf + rec.data_offset, |
| rec_backup.buf + rec_backup.data_offset, |
| rec.data_len ) == 0 ); |
| } |
| |
| exit: |
| |
| /* Cleanup */ |
| mbedtls_ssl_free( &ssl ); |
| mbedtls_ssl_transform_free( &t0 ); |
| mbedtls_ssl_transform_free( &t1 ); |
| |
| mbedtls_free( buf ); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE */ |
| void ssl_crypt_record_small( int cipher_type, int hash_id, |
| int etm, int tag_mode, int ver ) |
| { |
| /* |
| * Test pairs of encryption and decryption with an increasing |
| * amount of space in the record buffer - in more detail: |
| * 1) Try to encrypt with 0, 1, 2, ... bytes available |
| * in front of the plaintext, and expect the encryption |
| * to succeed starting from some offset. Always keep |
| * enough space in the end of the buffer. |
| * 2) Try to encrypt with 0, 1, 2, ... bytes available |
| * at the end of the plaintext, and expect the encryption |
| * to succeed starting from some offset. Always keep |
| * enough space at the beginning of the buffer. |
| * 3) Try to encrypt with 0, 1, 2, ... bytes available |
| * both at the front and end of the plaintext, |
| * and expect the encryption to succeed starting from |
| * some offset. |
| * |
| * If encryption succeeds, check that decryption succeeds |
| * and yields the original record. |
| */ |
| |
| mbedtls_ssl_context ssl; /* ONLY for debugging */ |
| |
| mbedtls_ssl_transform t0, t1; |
| unsigned char *buf = NULL; |
| size_t const buflen = 150; |
| mbedtls_record rec, rec_backup; |
| |
| int ret; |
| int mode; /* Mode 1, 2 or 3 as explained above */ |
| size_t offset; /* Available space at beginning/end/both */ |
| size_t threshold = 64; /* Maximum offset to test against */ |
| |
| size_t default_pre_padding = 64; /* Pre-padding to use in mode 2 */ |
| size_t default_post_padding = 64; /* Post-padding to use in mode 1 */ |
| |
| int seen_success; /* Indicates if in the current mode we've |
| * already seen a successful test. */ |
| |
| mbedtls_ssl_init( &ssl ); |
| mbedtls_ssl_transform_init( &t0 ); |
| mbedtls_ssl_transform_init( &t1 ); |
| TEST_ASSERT( build_transforms( &t0, &t1, cipher_type, hash_id, |
| etm, tag_mode, ver ) == 0 ); |
| |
| TEST_ASSERT( ( buf = mbedtls_calloc( 1, buflen ) ) != NULL ); |
| |
| for( mode=1; mode <= 3; mode++ ) |
| { |
| seen_success = 0; |
| for( offset=0; offset <= threshold; offset++ ) |
| { |
| mbedtls_ssl_transform *t_dec, *t_enc; |
| /* Take turns in who's sending and who's receiving. */ |
| if( offset % 2 == 0 ) |
| { |
| t_dec = &t0; |
| t_enc = &t1; |
| } |
| else |
| { |
| t_dec = &t1; |
| t_enc = &t0; |
| } |
| |
| memset( rec.ctr, offset, sizeof( rec.ctr ) ); |
| rec.type = 42; |
| rec.ver[0] = offset; |
| rec.ver[1] = offset; |
| rec.buf = buf; |
| rec.buf_len = buflen; |
| |
| switch( mode ) |
| { |
| case 1: /* Space in the beginning */ |
| rec.data_offset = offset; |
| rec.data_len = buflen - offset - default_post_padding; |
| break; |
| |
| case 2: /* Space in the end */ |
| rec.data_offset = default_pre_padding; |
| rec.data_len = buflen - default_pre_padding - offset; |
| break; |
| |
| case 3: /* Space in the beginning and end */ |
| rec.data_offset = offset; |
| rec.data_len = buflen - 2 * offset; |
| break; |
| |
| default: |
| TEST_ASSERT( 0 ); |
| break; |
| } |
| |
| memset( rec.buf + rec.data_offset, 42, rec.data_len ); |
| |
| /* Make a copy for later comparison */ |
| rec_backup = rec; |
| |
| /* Encrypt record */ |
| ret = mbedtls_ssl_encrypt_buf( &ssl, t_enc, &rec, rnd_std_rand, NULL ); |
| |
| if( ( mode == 1 || mode == 2 ) && seen_success ) |
| { |
| TEST_ASSERT( ret == 0 ); |
| } |
| else |
| { |
| TEST_ASSERT( ret == 0 || ret == MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL ); |
| if( ret == 0 ) |
| seen_success = 1; |
| } |
| |
| if( ret != 0 ) |
| continue; |
| |
| /* Decrypt record with t_dec */ |
| TEST_ASSERT( mbedtls_ssl_decrypt_buf( &ssl, t_dec, &rec ) == 0 ); |
| |
| /* Compare results */ |
| TEST_ASSERT( rec.type == rec_backup.type ); |
| TEST_ASSERT( memcmp( rec.ctr, rec_backup.ctr, 8 ) == 0 ); |
| TEST_ASSERT( rec.ver[0] == rec_backup.ver[0] ); |
| TEST_ASSERT( rec.ver[1] == rec_backup.ver[1] ); |
| TEST_ASSERT( rec.data_len == rec_backup.data_len ); |
| TEST_ASSERT( rec.data_offset == rec_backup.data_offset ); |
| TEST_ASSERT( memcmp( rec.buf + rec.data_offset, |
| rec_backup.buf + rec_backup.data_offset, |
| rec.data_len ) == 0 ); |
| } |
| |
| TEST_ASSERT( seen_success == 1 ); |
| } |
| |
| exit: |
| |
| /* Cleanup */ |
| mbedtls_ssl_free( &ssl ); |
| mbedtls_ssl_transform_free( &t0 ); |
| mbedtls_ssl_transform_free( &t1 ); |
| |
| mbedtls_free( buf ); |
| } |
| /* END_CASE */ |
