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mbedtls/tests/suites/test_suite_ssl.function
Andrzej Kurek a793237998
Calculate hashes of ssl encryption and decryption keys 
Optimize the key switching mechanism to set the key only if 
a different operation is performed with the context.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
2020-09-19 08:04:05 +02:00

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/* BEGIN_HEADER */
#include <mbedtls/ssl.h>
#include <mbedtls/ssl_internal.h>
#include <mbedtls/md.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 )
#if MBEDTLS_SSL_CID_OUT_LEN_MAX > MBEDTLS_SSL_CID_IN_LEN_MAX
#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_IN_LEN_MAX
#else
#define SSL_CID_LEN_MIN MBEDTLS_SSL_CID_OUT_LEN_MAX
#endif
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,
size_t cid0_len,
size_t cid1_len )
{
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];
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
unsigned char cid0[ SSL_CID_LEN_MIN ];
unsigned char cid1[ SSL_CID_LEN_MIN ];
rnd_std_rand( NULL, cid0, sizeof( cid0 ) );
rnd_std_rand( NULL, cid1, sizeof( cid1 ) );
#else
((void) cid0_len);
((void) cid1_len);
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
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 );
#if defined(MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS)
t_in->key_enc = mbedtls_calloc( 1, keylen );
t_in->key_dec = mbedtls_calloc( 1, keylen );
t_out->key_enc = mbedtls_calloc( 1, keylen );
t_out->key_dec = mbedtls_calloc( 1, keylen );
memcpy( t_in->key_enc, key0, keylen);
memcpy( t_in->key_dec, key1, keylen);
t_in->key_bitlen = cipher_info->key_bitlen;
memcpy( t_out->key_enc, key1, keylen);
memcpy( t_out->key_dec, key0, keylen);
t_out->key_bitlen = cipher_info->key_bitlen;
#if defined(MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY)
t_in->key_enc_hash = mbedtls_hash( t_in->key_enc, t_in->key_bitlen >> 3 );
t_in->key_dec_hash = mbedtls_hash( t_in->key_dec, t_in->key_bitlen >> 3 );
t_out->key_enc_hash = mbedtls_hash( t_out->key_enc, t_out->key_bitlen >> 3 );
t_out->key_dec_hash = mbedtls_hash( t_out->key_dec, t_out->key_bitlen >> 3 );
#endif
/* Setup cipher contexts */
CHK( mbedtls_cipher_setup( &t_in->cipher_ctx, cipher_info ) == 0 );
CHK( mbedtls_cipher_setup( &t_out->cipher_ctx, cipher_info ) == 0 );
#else
/* 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 );
#endif
#if defined(MBEDTLS_CIPHER_MODE_CBC)
if( cipher_info->mode == MBEDTLS_MODE_CBC )
{
#if defined(MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS)
CHK( mbedtls_cipher_set_padding_mode( &t_in->cipher_ctx,
MBEDTLS_PADDING_NONE ) == 0 );
CHK( mbedtls_cipher_set_padding_mode( &t_out->cipher_ctx,
MBEDTLS_PADDING_NONE ) == 0 );
#else
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
}
#endif /* MBEDTLS_CIPHER_MODE_CBC */
#if !defined(MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS)
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 );
#endif
/* 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_handle_t md_info;
unsigned char *md0, *md1;
/* Pick hash */
md_info = mbedtls_md_info_from_type( hash_id );
CHK( md_info != MBEDTLS_MD_INVALID_HANDLE );
/* 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( mbedtls_ssl_ver_gt( 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) && \
defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
t_out->encrypt_then_mac = etm;
t_in->encrypt_then_mac = etm;
#else
((void) etm);
#endif
#if !defined(MBEDTLS_SSL_CONF_FIXED_MINOR_VER)
t_out->minor_ver = ver;
t_in->minor_ver = ver;
#else
((void) ver);
#endif
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 ) );
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
/* Add CID */
memcpy( &t_in->in_cid, cid0, cid0_len );
memcpy( &t_in->out_cid, cid1, cid1_len );
t_in->in_cid_len = cid0_len;
t_in->out_cid_len = cid1_len;
memcpy( &t_out->in_cid, cid1, cid1_len );
memcpy( &t_out->out_cid, cid0, cid0_len );
t_out->in_cid_len = cid1_len;
t_out->out_cid_len = cid0_len;
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
cleanup:
mbedtls_free( key0 );
mbedtls_free( key1 );
return( ret );
}
/*
* Populate a session structure for serialization tests.
* Choose dummy values, mostly non-0 to distinguish from the init default.
*/
static int ssl_populate_session( mbedtls_ssl_session *session,
int ticket_len,
const char *crt_file )
{
#if defined(MBEDTLS_HAVE_TIME)
session->start = mbedtls_time( NULL ) - 42;
#endif
#if !defined(MBEDTLS_SSL_CONF_SINGLE_CIPHERSUITE)
session->ciphersuite = 0xabcd;
#endif
#if defined(MBEDTLS_ZLIB_SUPPORT)
session->compression = 1;
#endif
session->id_len = sizeof( session->id );
memset( session->id, 66, session->id_len );
memset( session->master, 17, sizeof( session->master ) );
#if defined(MBEDTLS_X509_CRT_PARSE_C) && defined(MBEDTLS_FS_IO)
if( strlen( crt_file ) != 0 )
{
mbedtls_x509_crt tmp_crt;
int ret;
mbedtls_x509_crt_init( &tmp_crt );
ret = mbedtls_x509_crt_parse_file( &tmp_crt, crt_file );
if( ret != 0 )
return( ret );
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
/* Move temporary CRT. */
session->peer_cert = mbedtls_calloc( 1, sizeof( *session->peer_cert ) );
if( session->peer_cert == NULL )
return( -1 );
*session->peer_cert = tmp_crt;
memset( &tmp_crt, 0, sizeof( tmp_crt ) );
#elif defined(MBEDTLS_SSL_RENEGOTIATION)
/* Calculate digest of temporary CRT. */
session->peer_cert_digest =
mbedtls_calloc( 1, MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN );
if( session->peer_cert_digest == NULL )
return( -1 );
ret = mbedtls_md( mbedtls_md_info_from_type(
MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE ),
tmp_crt.raw.p, tmp_crt.raw.len,
session->peer_cert_digest );
if( ret != 0 )
return( ret );
session->peer_cert_digest_type =
MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE;
session->peer_cert_digest_len =
MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN;
#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE && MBEDTLS_SSL_RENEGOTIATION */
mbedtls_x509_crt_free( &tmp_crt );
}
#else
(void) crt_file;
#endif
session->verify_result = 0xdeadbeef;
#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
if( ticket_len != 0 )
{
session->ticket = mbedtls_calloc( 1, ticket_len );
if( session->ticket == NULL )
return( -1 );
memset( session->ticket, 33, ticket_len );
}
session->ticket_len = ticket_len;
session->ticket_lifetime = 86401;
#else
(void) ticket_len;
#endif
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
session->mfl_code = 1;
#endif
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
session->trunc_hmac = 1;
#endif
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
session->encrypt_then_mac = 1;
#endif
return( 0 );
}
/* 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:!MBEDTLS_X509_REMOVE_HOSTNAME_VERIFICATION */
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,
int cid0_len, int cid1_len )
{
/*
* 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 );
#if defined(MBEDTLS_SSL_CONF_FIXED_MINOR_VER)
TEST_ASSUME( ver == MBEDTLS_SSL_CONF_FIXED_MINOR_VER );
#endif
TEST_ASSERT( build_transforms( &t0, &t1, cipher_type, hash_id,
etm, tag_mode, ver,
(size_t) cid0_len,
(size_t) cid1_len ) == 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;
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
rec.cid_len = 0;
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
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 */
ret = mbedtls_ssl_decrypt_buf( &ssl, t_dec, &rec );
TEST_ASSERT( ret == 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,
int cid0_len, int cid1_len )
{
/*
* 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 = 256;
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 = 96; /* Maximum offset to test against */
size_t default_pre_padding = 64; /* Pre-padding to use in mode 2 */
size_t default_post_padding = 128; /* 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,
(size_t) cid0_len,
(size_t) cid1_len ) == 0 );
#if defined(MBEDTLS_SSL_CONF_FIXED_MINOR_VER)
TEST_ASSUME( ver == MBEDTLS_SSL_CONF_FIXED_MINOR_VER );
#endif
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;
t_dec = &t0;
t_enc = &t1;
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;
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
rec.cid_len = 0;
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
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 */
/* BEGIN_CASE */
void ssl_serialize_session_save_load( int ticket_len, char *crt_file )
{
mbedtls_ssl_session original, restored;
unsigned char *buf = NULL;
size_t len;
/*
* Test that a save-load pair is the identity
*/
mbedtls_ssl_session_init( &original );
mbedtls_ssl_session_init( &restored );
/* Prepare a dummy session to work on */
TEST_ASSERT( ssl_populate_session( &original, ticket_len, crt_file ) == 0 );
/* Serialize it */
TEST_ASSERT( mbedtls_ssl_session_save( &original, NULL, 0, &len )
== MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
TEST_ASSERT( ( buf = mbedtls_calloc( 1, len ) ) != NULL );
TEST_ASSERT( mbedtls_ssl_session_save( &original, buf, len, &len )
== 0 );
/* Restore session from serialized data */
TEST_ASSERT( mbedtls_ssl_session_load( &restored, buf, len) == 0 );
/*
* Make sure both session structures are identical
*/
#if defined(MBEDTLS_HAVE_TIME)
TEST_ASSERT( original.start == restored.start );
#endif
#if !defined(MBEDTLS_SSL_CONF_SINGLE_CIPHERSUITE)
TEST_ASSERT( original.ciphersuite == restored.ciphersuite );
#endif
#if defined(MBEDTLS_ZLIB_SUPPORT)
TEST_ASSERT( original.compression == restored.compression );
#endif
TEST_ASSERT( original.id_len == restored.id_len );
TEST_ASSERT( memcmp( original.id,
restored.id, sizeof( original.id ) ) == 0 );
TEST_ASSERT( memcmp( original.master,
restored.master, sizeof( original.master ) ) == 0 );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
TEST_ASSERT( ( original.peer_cert == NULL ) ==
( restored.peer_cert == NULL ) );
if( original.peer_cert != NULL )
{
TEST_ASSERT( original.peer_cert->raw.len ==
restored.peer_cert->raw.len );
TEST_ASSERT( memcmp( original.peer_cert->raw.p,
restored.peer_cert->raw.p,
original.peer_cert->raw.len ) == 0 );
}
#elif defined(MBEDTLS_SSL_RENEGOTIATION)
TEST_ASSERT( original.peer_cert_digest_type ==
restored.peer_cert_digest_type );
TEST_ASSERT( original.peer_cert_digest_len ==
restored.peer_cert_digest_len );
TEST_ASSERT( ( original.peer_cert_digest == NULL ) ==
( restored.peer_cert_digest == NULL ) );
if( original.peer_cert_digest != NULL )
{
TEST_ASSERT( memcmp( original.peer_cert_digest,
restored.peer_cert_digest,
original.peer_cert_digest_len ) == 0 );
}
#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE && MBEDTLS_SSL_RENEGOTIATION */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
TEST_ASSERT( original.verify_result == restored.verify_result );
#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
TEST_ASSERT( original.ticket_len == restored.ticket_len );
if( original.ticket_len != 0 )
{
TEST_ASSERT( original.ticket != NULL );
TEST_ASSERT( restored.ticket != NULL );
TEST_ASSERT( memcmp( original.ticket,
restored.ticket, original.ticket_len ) == 0 );
}
TEST_ASSERT( original.ticket_lifetime == restored.ticket_lifetime );
#endif
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
TEST_ASSERT( original.mfl_code == restored.mfl_code );
#endif
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
TEST_ASSERT( original.trunc_hmac == restored.trunc_hmac );
#endif
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
TEST_ASSERT( original.encrypt_then_mac == restored.encrypt_then_mac );
#endif
exit:
mbedtls_ssl_session_free( &original );
mbedtls_ssl_session_free( &restored );
mbedtls_free( buf );
}
/* END_CASE */
/* BEGIN_CASE */
void ssl_serialize_session_load_save( int ticket_len, char *crt_file )
{
mbedtls_ssl_session session;
unsigned char *buf1 = NULL, *buf2 = NULL;
size_t len0, len1, len2;
/*
* Test that a load-save pair is the identity
*/
mbedtls_ssl_session_init( &session );
/* Prepare a dummy session to work on */
TEST_ASSERT( ssl_populate_session( &session, ticket_len, crt_file ) == 0 );
/* Get desired buffer size for serializing */
TEST_ASSERT( mbedtls_ssl_session_save( &session, NULL, 0, &len0 )
== MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
/* Allocate first buffer */
buf1 = mbedtls_calloc( 1, len0 );
TEST_ASSERT( buf1 != NULL );
/* Serialize to buffer and free live session */
TEST_ASSERT( mbedtls_ssl_session_save( &session, buf1, len0, &len1 )
== 0 );
TEST_ASSERT( len0 == len1 );
mbedtls_ssl_session_free( &session );
/* Restore session from serialized data */
TEST_ASSERT( mbedtls_ssl_session_load( &session, buf1, len1 ) == 0 );
/* Allocate second buffer and serialize to it */
buf2 = mbedtls_calloc( 1, len0 );
TEST_ASSERT( buf2 != NULL );
TEST_ASSERT( mbedtls_ssl_session_save( &session, buf2, len0, &len2 )
== 0 );
/* Make sure both serialized versions are identical */
TEST_ASSERT( len1 == len2 );
TEST_ASSERT( memcmp( buf1, buf2, len1 ) == 0 );
exit:
mbedtls_ssl_session_free( &session );
mbedtls_free( buf1 );
mbedtls_free( buf2 );
}
/* END_CASE */
/* BEGIN_CASE */
void ssl_serialize_session_save_buf_size( int ticket_len, char *crt_file )
{
mbedtls_ssl_session session;
unsigned char *buf = NULL;
size_t good_len, bad_len, test_len;
/*
* Test that session_save() fails cleanly on small buffers
*/
mbedtls_ssl_session_init( &session );
/* Prepare dummy session and get serialized size */
TEST_ASSERT( ssl_populate_session( &session, ticket_len, crt_file ) == 0 );
TEST_ASSERT( mbedtls_ssl_session_save( &session, NULL, 0, &good_len )
== MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
/* Try all possible bad lengths */
for( bad_len = 1; bad_len < good_len; bad_len++ )
{
/* Allocate exact size so that asan/valgrind can detect any overwrite */
mbedtls_free( buf );
TEST_ASSERT( ( buf = mbedtls_calloc( 1, bad_len ) ) != NULL );
TEST_ASSERT( mbedtls_ssl_session_save( &session, buf, bad_len,
&test_len )
== MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
TEST_ASSERT( test_len == good_len );
}
exit:
mbedtls_ssl_session_free( &session );
mbedtls_free( buf );
}
/* END_CASE */
/* BEGIN_CASE */
void ssl_serialize_session_load_buf_size( int ticket_len, char *crt_file )
{
mbedtls_ssl_session session;
unsigned char *good_buf = NULL, *bad_buf = NULL;
size_t good_len, bad_len;
/*
* Test that session_load() fails cleanly on small buffers
*/
mbedtls_ssl_session_init( &session );
/* Prepare serialized session data */
TEST_ASSERT( ssl_populate_session( &session, ticket_len, crt_file ) == 0 );
TEST_ASSERT( mbedtls_ssl_session_save( &session, NULL, 0, &good_len )
== MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
TEST_ASSERT( ( good_buf = mbedtls_calloc( 1, good_len ) ) != NULL );
TEST_ASSERT( mbedtls_ssl_session_save( &session, good_buf, good_len,
&good_len ) == 0 );
mbedtls_ssl_session_free( &session );
/* Try all possible bad lengths */
for( bad_len = 0; bad_len < good_len; bad_len++ )
{
/* Allocate exact size so that asan/valgrind can detect any overread */
mbedtls_free( bad_buf );
bad_buf = mbedtls_calloc( 1, bad_len ? bad_len : 1 );
TEST_ASSERT( bad_buf != NULL );
memcpy( bad_buf, good_buf, bad_len );
TEST_ASSERT( mbedtls_ssl_session_load( &session, bad_buf, bad_len )
== MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
}
exit:
mbedtls_ssl_session_free( &session );
mbedtls_free( good_buf );
mbedtls_free( bad_buf );
}
/* END_CASE */
/* BEGIN_CASE */
void ssl_session_serialize_version_check( int corrupt_major,
int corrupt_minor,
int corrupt_patch,
int corrupt_config )
{
unsigned char serialized_session[ 2048 ];
size_t serialized_session_len;
unsigned cur_byte;
mbedtls_ssl_session session;
uint8_t should_corrupt_byte[] = { corrupt_major == 1,
corrupt_minor == 1,
corrupt_patch == 1,
corrupt_config == 1,
corrupt_config == 1 };
mbedtls_ssl_session_init( &session );
/* Infer length of serialized session. */
TEST_ASSERT( mbedtls_ssl_session_save( &session,
serialized_session,
sizeof( serialized_session ),
&serialized_session_len ) == 0 );
mbedtls_ssl_session_free( &session );
/* Without any modification, we should be able to successfully
* de-serialize the session - double-check that. */
TEST_ASSERT( mbedtls_ssl_session_load( &session,
serialized_session,
serialized_session_len ) == 0 );
mbedtls_ssl_session_free( &session );
/* Go through the bytes in the serialized session header and
* corrupt them bit-by-bit. */
for( cur_byte = 0; cur_byte < sizeof( should_corrupt_byte ); cur_byte++ )
{
int cur_bit;
unsigned char * const byte = &serialized_session[ cur_byte ];
if( should_corrupt_byte[ cur_byte ] == 0 )
continue;
for( cur_bit = 0; cur_bit < CHAR_BIT; cur_bit++ )
{
unsigned char const corrupted_bit = 0x1u << cur_bit;
/* Modify a single bit in the serialized session. */
*byte ^= corrupted_bit;
/* Attempt to deserialize */
TEST_ASSERT( mbedtls_ssl_session_load( &session,
serialized_session,
serialized_session_len ) ==
MBEDTLS_ERR_SSL_VERSION_MISMATCH );
/* Undo the change */
*byte ^= corrupted_bit;
}
}
}
/* END_CASE */
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