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Merge fix for IE Certificate Compatibility

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This commit is contained in:
Simon Butcher 2016-10-13 17:21:01 +01:00
parent 2bd0fbaad0
commit 99000142cb
8 changed files with 178 additions and 33 deletions
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3
ChangeLog
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@ -48,6 +48,9 @@ Bugfix
ssl_parse_hello_verify_request() for DTLS. Found by Guido Vranken.
* Fix check for validity of date when parsing in mbedtls_x509_get_time().
Found by subramanyam-c. #626
* Fix compatibility issue with Internet Explorer client authentication,
where the limited hash choices prevented the client from sending its
certificate. Found by teumas. #513
Changes
* Extended test coverage of special cases, and added new timing test suite.

2
include/mbedtls/ssl.h
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@ -107,6 +107,8 @@
#define MBEDTLS_ERR_SSL_TIMEOUT -0x6800 /**< The operation timed out. */
#define MBEDTLS_ERR_SSL_CLIENT_RECONNECT -0x6780 /**< The client initiated a reconnect from the same port. */
#define MBEDTLS_ERR_SSL_UNEXPECTED_RECORD -0x6700 /**< Record header looks valid but is not expected. */
#define MBEDTLS_ERR_SSL_NON_FATAL -0x6680 /**< The alert message received indicates a non-fatal error. */
#define MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH -0x6600 /**< Couldn't set the hash for verifying CertificateVerify */
/*
* Various constants

6
include/mbedtls/ssl_internal.h
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@ -355,6 +355,11 @@ int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl );
void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl );
int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl );
int mbedtls_ssl_read_record_layer( mbedtls_ssl_context *ssl );
int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl );
int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl );
void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl );
int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl );
int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want );
@ -384,6 +389,7 @@ mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig );
mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash );
unsigned char mbedtls_ssl_hash_from_md_alg( int md );
int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md );
#if defined(MBEDTLS_ECP_C)
int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id );

4
library/error.c
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@ -435,6 +435,10 @@ void mbedtls_strerror( int ret, char *buf, size_t buflen )
mbedtls_snprintf( buf, buflen, "SSL - The client initiated a reconnect from the same port" );
if( use_ret == -(MBEDTLS_ERR_SSL_UNEXPECTED_RECORD) )
mbedtls_snprintf( buf, buflen, "SSL - Record header looks valid but is not expected" );
if( use_ret == -(MBEDTLS_ERR_SSL_NON_FATAL) )
mbedtls_snprintf( buf, buflen, "SSL - The alert message received indicates a non-fatal error" );
if( use_ret == -(MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH) )
mbedtls_snprintf( buf, buflen, "SSL - Couldn't set the hash for verifying CertificateVerify" );
#endif /* MBEDTLS_SSL_TLS_C */
#if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)

9
library/ssl_cli.c
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@ -2639,6 +2639,15 @@ static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
{
size_t sig_alg_len = ( ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 1 + n] << 8 )
| ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n] ) );
#if defined(MBEDTLS_DEBUG_C)
unsigned char* sig_alg = buf + mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n;
size_t i;
for( i = 0; i < sig_alg_len; i += 2 )
{
MBEDTLS_SSL_DEBUG_MSG( 3, ( "Supported Signature Algorithm found: %d,%d", sig_alg[i], sig_alg[i + 1] ) );
}
#endif
n += 2 + sig_alg_len;

59
library/ssl_srv.c
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@ -1043,7 +1043,6 @@ have_ciphersuite_v2:
ssl->session_negotiate->ciphersuite = ciphersuites[i];
ssl->transform_negotiate->ciphersuite_info = ciphersuite_info;
mbedtls_ssl_optimize_checksum( ssl, ssl->transform_negotiate->ciphersuite_info );
/*
* SSLv2 Client Hello relevant renegotiation security checks
@ -1840,7 +1839,6 @@ have_ciphersuite:
ssl->session_negotiate->ciphersuite = ciphersuites[i];
ssl->transform_negotiate->ciphersuite_info = ciphersuite_info;
mbedtls_ssl_optimize_checksum( ssl, ssl->transform_negotiate->ciphersuite_info );
ssl->state++;
@ -2556,29 +2554,27 @@ static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
*/
if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
{
/*
* Only use current running hash algorithm that is already required
* for requested ciphersuite.
*/
ssl->handshake->verify_sig_alg = MBEDTLS_SSL_HASH_SHA256;
if( ssl->transform_negotiate->ciphersuite_info->mac ==
MBEDTLS_MD_SHA384 )
{
ssl->handshake->verify_sig_alg = MBEDTLS_SSL_HASH_SHA384;
}
const int *cur;
/*
* Supported signature algorithms
*/
for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
{
unsigned char hash = mbedtls_ssl_hash_from_md_alg( *cur );
if( MBEDTLS_SSL_HASH_NONE == hash || mbedtls_ssl_set_calc_verify_md( ssl, hash ) )
continue;
#if defined(MBEDTLS_RSA_C)
p[2 + sa_len++] = ssl->handshake->verify_sig_alg;
p[2 + sa_len++] = hash;
p[2 + sa_len++] = MBEDTLS_SSL_SIG_RSA;
#endif
#if defined(MBEDTLS_ECDSA_C)
p[2 + sa_len++] = ssl->handshake->verify_sig_alg;
p[2 + sa_len++] = hash;
p[2 + sa_len++] = MBEDTLS_SSL_SIG_ECDSA;
#endif
}
p[0] = (unsigned char)( sa_len >> 8 );
p[1] = (unsigned char)( sa_len );
@ -3581,17 +3577,28 @@ static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
return( 0 );
}
/* Needs to be done before read_record() to exclude current message */
ssl->handshake->calc_verify( ssl, hash );
/* Read the message without adding it to the checksum */
do {
if( ( ret = mbedtls_ssl_read_record( ssl ) ) != 0 )
if( ( ret = mbedtls_ssl_read_record_layer( ssl ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
return( ret );
}
ret = mbedtls_ssl_handle_message_type( ssl );
} while( MBEDTLS_ERR_SSL_NON_FATAL == ret );
if( 0 != ret )
{
MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_handle_message_type" ), ret );
return( ret );
}
ssl->state++;
/* Process the message contents */
if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ||
ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE_VERIFY )
{
@ -3638,14 +3645,19 @@ static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
/*
* Hash
*/
if( ssl->in_msg[i] != ssl->handshake->verify_sig_alg )
md_alg = mbedtls_ssl_md_alg_from_hash( ssl->in_msg[i] );
if( md_alg == MBEDTLS_MD_NONE || mbedtls_ssl_set_calc_verify_md( ssl, ssl->in_msg[i] ) )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "peer not adhering to requested sig_alg"
" for verify message" ) );
return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
}
md_alg = mbedtls_ssl_md_alg_from_hash( ssl->handshake->verify_sig_alg );
#if !defined(MBEDTLS_MD_SHA1)
if( MBEDTLS_MD_SHA1 == md_alg )
hash_start += 16;
#endif
/* Info from md_alg will be used instead */
hashlen = 0;
@ -3696,6 +3708,9 @@ static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
}
/* Calculate hash and verify signature */
ssl->handshake->calc_verify( ssl, hash );
if( ( ret = mbedtls_pk_verify( &ssl->session_negotiate->peer_cert->pk,
md_alg, hash_start, hashlen,
ssl->in_msg + i, sig_len ) ) != 0 )
@ -3704,6 +3719,8 @@ static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
return( ret );
}
mbedtls_ssl_update_handshake_status( ssl );
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate verify" ) );
return( ret );

106
library/ssl_tls.c
View File

@ -3082,7 +3082,7 @@ static int ssl_reassemble_dtls_handshake( mbedtls_ssl_context *ssl )
}
#endif /* MBEDTLS_SSL_PROTO_DTLS */
static int ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
int mbedtls_ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
{
if( ssl->in_msglen < mbedtls_ssl_hs_hdr_len( ssl ) )
{
@ -3164,6 +3164,12 @@ static int ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
}
return( 0 );
}
void mbedtls_ssl_update_handshake_status( mbedtls_ssl_context *ssl )
{
if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER &&
ssl->handshake != NULL )
{
@ -3178,8 +3184,6 @@ static int ssl_prepare_handshake_record( mbedtls_ssl_context *ssl )
ssl->handshake->in_msg_seq++;
}
#endif
return( 0 );
}
/*
@ -3735,6 +3739,38 @@ int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> read record" ) );
do {
if( ( ret = mbedtls_ssl_read_record_layer( ssl ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record_layer" ), ret );
return( ret );
}
ret = mbedtls_ssl_handle_message_type( ssl );
} while( MBEDTLS_ERR_SSL_NON_FATAL == ret );
if( 0 != ret )
{
MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_handle_message_type" ), ret );
return( ret );
}
if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
{
mbedtls_ssl_update_handshake_status( ssl );
}
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read record" ) );
return( 0 );
}
int mbedtls_ssl_read_record_layer( mbedtls_ssl_context *ssl )
{
int ret;
if( ssl->in_hslen != 0 && ssl->in_hslen < ssl->in_msglen )
{
/*
@ -3748,9 +3784,6 @@ int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
MBEDTLS_SSL_DEBUG_BUF( 4, "remaining content in record",
ssl->in_msg, ssl->in_msglen );
if( ( ret = ssl_prepare_handshake_record( ssl ) ) != 0 )
return( ret );
return( 0 );
}
@ -3759,7 +3792,10 @@ int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl )
/*
* Read the record header and parse it
*/
#if defined(MBEDTLS_SSL_PROTO_DTLS)
read_record_header:
#endif
if( ( ret = mbedtls_ssl_fetch_input( ssl, mbedtls_ssl_hdr_len( ssl ) ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
@ -3913,14 +3949,23 @@ read_record_header:
}
#endif
return( 0 );
}
int mbedtls_ssl_handle_message_type( mbedtls_ssl_context *ssl )
{
int ret;
/*
* Handle particular types of records
*/
if( ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE )
{
if( ( ret = ssl_prepare_handshake_record( ssl ) ) != 0 )
if( ( ret = mbedtls_ssl_prepare_handshake_record( ssl ) ) != 0 )
{
return( ret );
}
}
if( ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT )
{
@ -3967,11 +4012,9 @@ read_record_header:
#endif /* MBEDTLS_SSL_PROTO_SSL3 && MBEDTLS_SSL_SRV_C */
/* Silently ignore: fetch new message */
goto read_record_header;
return MBEDTLS_ERR_SSL_NON_FATAL;
}
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= read record" ) );
return( 0 );
}
@ -7602,4 +7645,47 @@ void mbedtls_ssl_read_version( int *major, int *minor, int transport,
}
}
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:
ssl->handshake->calc_verify = ssl_calc_verify_tls;
break;
#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)
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 */
}
#endif /* MBEDTLS_SSL_TLS_C */

18
tests/ssl-opt.sh
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@ -1725,6 +1725,24 @@ run_test "Authentication: server badcert, client none" \
-C "! mbedtls_ssl_handshake returned" \
-C "X509 - Certificate verification failed"
run_test "Authentication: client SHA256, server required" \
"$P_SRV auth_mode=required" \
"$P_CLI debug_level=3 crt_file=data_files/server6.crt \
key_file=data_files/server6.key \
force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384" \
0 \
-c "Supported Signature Algorithm found: 4," \
-c "Supported Signature Algorithm found: 5,"
run_test "Authentication: client SHA384, server required" \
"$P_SRV auth_mode=required" \
"$P_CLI debug_level=3 crt_file=data_files/server6.crt \
key_file=data_files/server6.key \
force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256" \
0 \
-c "Supported Signature Algorithm found: 4," \
-c "Supported Signature Algorithm found: 5,"
run_test "Authentication: client badcert, server required" \
"$P_SRV debug_level=3 auth_mode=required" \
"$P_CLI debug_level=3 crt_file=data_files/server5-badsign.crt \