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Add tests for missing CA chains and bad curves.

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This commit adds four tests to tests/ssl-opt.sh:
(1) & (2): Check behaviour of optional/required verification when the
trusted CA chain is empty.
(3) & (4): Check behaviour of optional/required verification when the
client receives a server certificate with an unsupported curve.
This commit is contained in:
Hanno Becker 2017-05-15 16:05:15 +01:00
parent a3929bac1e
commit 61c0c70418
4 changed files with 234 additions and 0 deletions
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11
library/ssl_tls.c
View File

@ -4444,6 +4444,17 @@ int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED;
}
#if defined(MBEDTLS_DEBUG_C)
if( ssl->session_negotiate->verify_result != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %x",
ssl->session_negotiate->verify_result ) );
}
else
{
MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) );
}
#endif /* MBEDTLS_DEBUG_C */
}
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );

88
programs/ssl/ssl_client2.c
View File

@ -94,6 +94,7 @@ int main( void )
#define DFL_RECONNECT_HARD 0
#define DFL_TICKETS MBEDTLS_SSL_SESSION_TICKETS_ENABLED
#define DFL_ALPN_STRING NULL
#define DFL_CURVES NULL
#define DFL_TRANSPORT MBEDTLS_SSL_TRANSPORT_STREAM
#define DFL_HS_TO_MIN 0
#define DFL_HS_TO_MAX 0
@ -174,6 +175,17 @@ int main( void )
#define USAGE_ALPN ""
#endif /* MBEDTLS_SSL_ALPN */
#if defined(MBEDTLS_ECP_C)
#define USAGE_CURVES \
" curves=a,b,c,d default: \"default\" (library default)\n" \
" example: \"secp521r1,brainpoolP512r1\"\n" \
" - use \"none\" for empty list\n" \
" - see mbedtls_ecp_curve_list()\n" \
" for acceptable curve names\n"
#else
#define USAGE_CURVES ""
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
#define USAGE_DTLS \
" dtls=%%d default: 0 (TLS)\n" \
@ -248,6 +260,7 @@ int main( void )
USAGE_FALLBACK \
USAGE_EMS \
USAGE_ETM \
USAGE_CURVES \
USAGE_RECSPLIT \
USAGE_DHMLEN \
"\n" \
@ -300,6 +313,7 @@ struct options
int reco_delay; /* delay in seconds before resuming session */
int reconnect_hard; /* unexpectedly reconnect from the same port */
int tickets; /* enable / disable session tickets */
const char *curves; /* list of supported elliptic curves */
const char *alpn_string; /* ALPN supported protocols */
int transport; /* TLS or DTLS? */
uint32_t hs_to_min; /* Initial value of DTLS handshake timer */
@ -415,6 +429,11 @@ int main( int argc, char *argv[] )
#if defined(MBEDTLS_SSL_ALPN)
const char *alpn_list[10];
#endif
#if defined(MBEDTLS_ECP_C)
mbedtls_ecp_group_id curve_list[20];
const mbedtls_ecp_curve_info *curve_cur;
#endif
const char *pers = "ssl_client2";
#if defined(MBEDTLS_X509_CRT_PARSE_C)
@ -510,6 +529,7 @@ int main( int argc, char *argv[] )
opt.reconnect_hard = DFL_RECONNECT_HARD;
opt.tickets = DFL_TICKETS;
opt.alpn_string = DFL_ALPN_STRING;
opt.curves = DFL_CURVES;
opt.transport = DFL_TRANSPORT;
opt.hs_to_min = DFL_HS_TO_MIN;
opt.hs_to_max = DFL_HS_TO_MAX;
@ -664,6 +684,8 @@ int main( int argc, char *argv[] )
default: goto usage;
}
}
else if( strcmp( p, "curves" ) == 0 )
opt.curves = q;
else if( strcmp( p, "etm" ) == 0 )
{
switch( atoi( q ) )
@ -921,6 +943,64 @@ int main( int argc, char *argv[] )
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
#if defined(MBEDTLS_ECP_C)
if( opt.curves != NULL )
{
p = (char *) opt.curves;
i = 0;
if( strcmp( p, "none" ) == 0 )
{
curve_list[0] = MBEDTLS_ECP_DP_NONE;
}
else if( strcmp( p, "default" ) != 0 )
{
/* Leave room for a final NULL in curve list */
while( i < (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
&& *p != '\0' )
{
q = p;
/* Terminate the current string */
while( *p != ',' && *p != '\0' )
p++;
if( *p == ',' )
*p++ = '\0';
if( ( curve_cur = mbedtls_ecp_curve_info_from_name( q ) ) != NULL )
{
curve_list[i++] = curve_cur->grp_id;
}
else
{
mbedtls_printf( "unknown curve %s\n", q );
mbedtls_printf( "supported curves: " );
for( curve_cur = mbedtls_ecp_curve_list();
curve_cur->grp_id != MBEDTLS_ECP_DP_NONE;
curve_cur++ )
{
mbedtls_printf( "%s ", curve_cur->name );
}
mbedtls_printf( "\n" );
goto exit;
}
}
mbedtls_printf("Number of curves: %d\n", i );
if( i == (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
&& *p != '\0' )
{
mbedtls_printf( "curves list too long, maximum %zu",
(size_t) ( sizeof( curve_list ) / sizeof( *curve_list ) - 1 ) );
goto exit;
}
curve_list[i] = MBEDTLS_ECP_DP_NONE;
}
}
#endif /* MBEDTLS_ECP_C */
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
{
@ -1210,6 +1290,14 @@ int main( int argc, char *argv[] )
}
#endif
#if defined(MBEDTLS_ECP_C)
if( opt.curves != NULL &&
strcmp( opt.curves, "default" ) != 0 )
{
mbedtls_ssl_conf_curves( &conf, curve_list );
}
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
if( ( ret = mbedtls_ssl_conf_psk( &conf, psk, psk_len,
(const unsigned char *) opt.psk_identity,

87
programs/ssl/ssl_server2.c
View File

@ -129,6 +129,7 @@ int main( void )
#define DFL_CACHE_TIMEOUT -1
#define DFL_SNI NULL
#define DFL_ALPN_STRING NULL
#define DFL_CURVES NULL
#define DFL_DHM_FILE NULL
#define DFL_TRANSPORT MBEDTLS_SSL_TRANSPORT_STREAM
#define DFL_COOKIES 1
@ -299,6 +300,17 @@ int main( void )
#define USAGE_RENEGO ""
#endif
#if defined(MBEDTLS_ECP_C)
#define USAGE_CURVES \
" curves=a,b,c,d default: \"default\" (library default)\n" \
" example: \"secp521r1,brainpoolP512r1\"\n" \
" - use \"none\" for empty list\n" \
" - see mbedtls_ecp_curve_list()\n" \
" for acceptable curve names\n"
#else
#define USAGE_CURVES ""
#endif
#define USAGE \
"\n usage: ssl_server2 param=<>...\n" \
"\n acceptable parameters:\n" \
@ -332,6 +344,7 @@ int main( void )
USAGE_ALPN \
USAGE_EMS \
USAGE_ETM \
USAGE_CURVES \
"\n" \
" arc4=%%d default: (library default: 0)\n" \
" allow_sha1=%%d default: 0\n" \
@ -398,6 +411,7 @@ struct options
int cache_max; /* max number of session cache entries */
int cache_timeout; /* expiration delay of session cache entries */
char *sni; /* string describing sni information */
const char *curves; /* list of supported elliptic curves */
const char *alpn_string; /* ALPN supported protocols */
const char *dhm_file; /* the file with the DH parameters */
int extended_ms; /* allow negotiation of extended MS? */
@ -854,6 +868,10 @@ int main( int argc, char *argv[] )
#if defined(SNI_OPTION)
sni_entry *sni_info = NULL;
#endif
#if defined(MBEDTLS_ECP_C)
mbedtls_ecp_group_id curve_list[20];
const mbedtls_ecp_curve_info * curve_cur;
#endif
#if defined(MBEDTLS_SSL_ALPN)
const char *alpn_list[10];
#endif
@ -963,6 +981,7 @@ int main( int argc, char *argv[] )
opt.cache_timeout = DFL_CACHE_TIMEOUT;
opt.sni = DFL_SNI;
opt.alpn_string = DFL_ALPN_STRING;
opt.curves = DFL_CURVES;
opt.dhm_file = DFL_DHM_FILE;
opt.transport = DFL_TRANSPORT;
opt.cookies = DFL_COOKIES;
@ -1039,6 +1058,8 @@ int main( int argc, char *argv[] )
}
opt.force_ciphersuite[1] = 0;
}
else if( strcmp( p, "curves" ) == 0 )
opt.curves = q;
else if( strcmp( p, "version_suites" ) == 0 )
opt.version_suites = q;
else if( strcmp( p, "renegotiation" ) == 0 )
@ -1392,6 +1413,64 @@ int main( int argc, char *argv[] )
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
#if defined(MBEDTLS_ECP_C)
if( opt.curves != NULL )
{
p = (char *) opt.curves;
i = 0;
if( strcmp( p, "none" ) == 0 )
{
curve_list[0] = MBEDTLS_ECP_DP_NONE;
}
else if( strcmp( p, "default" ) != 0 )
{
/* Leave room for a final NULL in curve list */
while( i < (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
&& *p != '\0' )
{
q = p;
/* Terminate the current string */
while( *p != ',' && *p != '\0' )
p++;
if( *p == ',' )
*p++ = '\0';
if( ( curve_cur = mbedtls_ecp_curve_info_from_name( q ) ) != NULL )
{
curve_list[i++] = curve_cur->grp_id;
}
else
{
mbedtls_printf( "unknown curve %s\n", q );
mbedtls_printf( "supported curves: " );
for( curve_cur = mbedtls_ecp_curve_list();
curve_cur->grp_id != MBEDTLS_ECP_DP_NONE;
curve_cur++ )
{
mbedtls_printf( "%s ", curve_cur->name );
}
mbedtls_printf( "\n" );
goto exit;
}
}
mbedtls_printf("Number of curves: %d\n", i );
if( i == (int) ( sizeof( curve_list ) / sizeof( *curve_list ) ) - 1
&& *p != '\0' )
{
mbedtls_printf( "curves list too long, maximum %zu",
(size_t) ( sizeof( curve_list ) / sizeof( *curve_list ) - 1 ) );
goto exit;
}
curve_list[i] = MBEDTLS_ECP_DP_NONE;
}
}
#endif /* MBEDTLS_ECP_C */
#if defined(MBEDTLS_SSL_ALPN)
if( opt.alpn_string != NULL )
{
@ -1840,6 +1919,14 @@ int main( int argc, char *argv[] )
mbedtls_ssl_conf_sni( &conf, sni_callback, sni_info );
#endif
#if defined(MBEDTLS_ECP_C)
if( opt.curves != NULL &&
strcmp( opt.curves, "default" ) != 0 )
{
mbedtls_ssl_conf_curves( &conf, curve_list );
}
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
if( strlen( opt.psk ) != 0 && strlen( opt.psk_identity ) != 0 )
{

48
tests/ssl-opt.sh
View File

@ -1763,6 +1763,54 @@ run_test "Authentication: server badcert, client optional" \
-C "! mbedtls_ssl_handshake returned" \
-C "X509 - Certificate verification failed"
run_test "Authentication: server goodcert, client optional, no trusted CA" \
"$P_SRV" \
"$P_CLI debug_level=3 auth_mode=optional ca_file=none ca_path=none" \
0 \
-c "x509_verify_cert() returned" \
-c "! The certificate is not correctly signed by the trusted CA" \
-c "! Certificate verification flags"\
-C "! mbedtls_ssl_handshake returned" \
-C "X509 - Certificate verification failed" \
-C "SSL - No CA Chain is set, but required to operate"
run_test "Authentication: server goodcert, client required, no trusted CA" \
"$P_SRV" \
"$P_CLI debug_level=3 auth_mode=required ca_file=none ca_path=none" \
1 \
-c "x509_verify_cert() returned" \
-c "! The certificate is not correctly signed by the trusted CA" \
-c "! Certificate verification flags"\
-c "! mbedtls_ssl_handshake returned" \
-c "SSL - No CA Chain is set, but required to operate"
# The purpose of the next two tests is to test the client's behaviour when receiving a server
# certificate with an unsupported elliptic curve. This should usually not happen because
# the client informs the server about the supported curves - it does, though, in the
# corner case of a static ECDH suite, because the server doesn't check the curve on that
# occasion (to be fixed). If that bug's fixed, the test needs to be altered to use a
# different means to have the server ignoring the client's supported curve list.
requires_config_enabled MBEDTLS_ECP_C
run_test "Authentication: server ECDH p256v1, client required, p256v1 unsupported" \
"$P_SRV debug_level=1 key_file=data_files/server5.key \
crt_file=data_files/server5.ku-ka.crt" \
"$P_CLI debug_level=3 auth_mode=required curves=secp521r1" \
1 \
-c "bad certificate (EC key curve)"\
-c "! Certificate verification flags"\
-C "bad server certificate (ECDH curve)" # Expect failure at earlier verification stage
requires_config_enabled MBEDTLS_ECP_C
run_test "Authentication: server ECDH p256v1, client optional, p256v1 unsupported" \
"$P_SRV debug_level=1 key_file=data_files/server5.key \
crt_file=data_files/server5.ku-ka.crt" \
"$P_CLI debug_level=3 auth_mode=optional curves=secp521r1" \
1 \
-c "bad certificate (EC key curve)"\
-c "! Certificate verification flags"\
-c "bad server certificate (ECDH curve)" # Expect failure only at ECDH params check
run_test "Authentication: server badcert, client none" \
"$P_SRV crt_file=data_files/server5-badsign.crt \
key_file=data_files/server5.key" \