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Refine code in mbedtls_ssl_reset_transcript_for_hrr

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Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
This commit is contained in:
XiaokangQian 2022-01-24 08:56:23 +00:00
parent f1e7d12cb6
commit 0ece998287
1 changed files with 23 additions and 54 deletions
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77
library/ssl_tls13_generic.c
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@ -1128,37 +1128,6 @@ cleanup:
#endif /* MBEDTLS_SSL_TLS1_3_COMPATIBILITY_MODE */
static int ssl_hash_transcript_core( mbedtls_ssl_context *ssl,
mbedtls_md_type_t md,
unsigned char *transcript,
size_t len,
size_t *olen )
{
int ret;
size_t hash_size;
if( len < 4 )
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
ret = mbedtls_ssl_get_handshake_transcript( ssl, md,
transcript + 4,
len - 4,
&hash_size );
if( ret != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 4, "mbedtls_ssl_get_handshake_transcript", ret );
return( ret );
}
transcript[0] = MBEDTLS_SSL_HS_MESSAGE_HASH;
transcript[1] = 0;
transcript[2] = 0;
transcript[3] = (unsigned char) hash_size;
*olen = 4 + hash_size;
return( 0 );
}
/* Reset SSL context and update hash for handling HRR.
*
* Replace Transcript-Hash(X) by
@ -1174,27 +1143,35 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char hash_transcript[ MBEDTLS_MD_MAX_SIZE + 4 ];
size_t hash_olen;
size_t hash_len;
const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
uint16_t cipher_suite = ssl->session_negotiate->ciphersuite;
ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( cipher_suite );
MBEDTLS_SSL_DEBUG_MSG( 3, ( "Reset SSL session for HRR" ) );
ret = mbedtls_ssl_get_handshake_transcript( ssl, ciphersuite_info->mac,
hash_transcript + 4,
MBEDTLS_MD_MAX_SIZE,
&hash_len );
if( ret != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 4, "mbedtls_ssl_get_handshake_transcript", ret );
return( ret );
}
hash_transcript[0] = MBEDTLS_SSL_HS_MESSAGE_HASH;
hash_transcript[1] = 0;
hash_transcript[2] = 0;
hash_transcript[3] = (unsigned char) hash_len;
hash_len += 4;
if( ciphersuite_info->mac == MBEDTLS_MD_SHA256 )
{
#if defined(MBEDTLS_SHA256_C)
ret = ssl_hash_transcript_core( ssl, MBEDTLS_MD_SHA256,
hash_transcript,
sizeof( hash_transcript ),
&hash_olen );
if( ret != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 4, "ssl_hash_transcript_core", ret );
return( ret );
}
MBEDTLS_SSL_DEBUG_BUF( 4, "Truncated SHA-256 handshake transcript",
hash_transcript, hash_olen );
hash_transcript, hash_len );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_hash_abort( &ssl->handshake->fin_sha256_psa );
@ -1202,23 +1179,13 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
#else
mbedtls_sha256_starts( &ssl->handshake->fin_sha256, 0 );
#endif
ssl->handshake->update_checksum( ssl, hash_transcript, hash_olen );
#endif /* MBEDTLS_SHA256_C */
}
else if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
{
#if defined(MBEDTLS_SHA384_C)
ret = ssl_hash_transcript_core( ssl, MBEDTLS_MD_SHA384,
hash_transcript,
sizeof( hash_transcript ),
&hash_olen );
if( ret != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 4, "ssl_hash_transcript_core", ret );
return( ret );
}
MBEDTLS_SSL_DEBUG_BUF( 4, "Truncated SHA-384 handshake transcript",
hash_transcript, hash_olen );
hash_transcript, hash_len );
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_hash_abort( &ssl->handshake->fin_sha384_psa );
@ -1226,10 +1193,12 @@ int mbedtls_ssl_reset_transcript_for_hrr( mbedtls_ssl_context *ssl )
#else
mbedtls_sha512_starts( &ssl->handshake->fin_sha512, 1 );
#endif
ssl->handshake->update_checksum( ssl, hash_transcript, hash_olen );
#endif /* MBEDTLS_SHA384_C */
}
#if defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA384_C)
ssl->handshake->update_checksum( ssl, hash_transcript, hash_len );
#endif /* MBEDTLS_SHA256_C || MBEDTLS_SHA384_C */
return( ret );
}