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ssl_server2: Add cmd line options to configure use of CID extension

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This commit is contained in:
Hanno Becker 2019-04-09 17:28:10 +01:00
parent 7a7aa1943e
commit 1029acee1d
1 changed files with 95 additions and 0 deletions
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95
programs/ssl/ssl_server2.c
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@ -137,6 +137,8 @@ int main( void )
#define DFL_MAX_VERSION -1
#define DFL_ARC4 -1
#define DFL_SHA1 -1
#define DFL_CID_ENABLED 0
#define DFL_CID_VALUE ""
#define DFL_AUTH_MODE -1
#define DFL_CERT_REQ_CA_LIST MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED
#define DFL_MFL_CODE MBEDTLS_SSL_MAX_FRAG_LEN_NONE
@ -222,6 +224,16 @@ int main( void )
#define USAGE_SSL_ASYNC ""
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
#if defined(MBEDTLS_SSL_CID)
#define USAGE_CID \
" cid=%%d Disable (0) or enable (1) the use of the DTLS Connection ID extension.\n" \
" default: 0 (disabled)\n" \
" cid_val=%%s The CID to use for incoming messages (in hex, without 0x).\n" \
" default: \"\"\n"
#else /* MBEDTLS_SSL_CID */
#define USAGE_CID ""
#endif /* MBEDTLS_SSL_CID */
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
#define USAGE_PSK \
" psk=%%s default: \"\" (in hex, without 0x)\n" \
@ -510,6 +522,8 @@ struct options
int dtls_mtu; /* UDP Maximum tranport unit for DTLS */
int dgram_packing; /* allow/forbid datagram packing */
int badmac_limit; /* Limit of records with bad MAC */
int cid_enabled; /* whether to use the CID extension or not */
const char *cid_val; /* the CID to use for incoming messages */
} opt;
int query_config( const char *config );
@ -1260,6 +1274,11 @@ int main( int argc, char *argv[] )
unsigned char alloc_buf[MEMORY_HEAP_SIZE];
#endif
#if defined(MBEDTLS_SSL_CID)
unsigned char cid[MBEDTLS_SSL_CID_IN_LEN_MAX];
size_t cid_len = 0;
#endif
int i;
char *p, *q;
const int *list;
@ -1337,6 +1356,8 @@ int main( int argc, char *argv[] )
opt.event = DFL_EVENT;
opt.response_size = DFL_RESPONSE_SIZE;
opt.nbio = DFL_NBIO;
opt.cid_enabled = DFL_CID_ENABLED;
opt.cid_val = DFL_CID_VALUE;
opt.read_timeout = DFL_READ_TIMEOUT;
opt.ca_file = DFL_CA_FILE;
opt.ca_path = DFL_CA_PATH;
@ -1475,6 +1496,18 @@ int main( int argc, char *argv[] )
opt.async_private_error = n;
}
#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
#if defined(MBEDTLS_SSL_CID)
else if( strcmp( p, "cid" ) == 0 )
{
opt.cid_enabled = atoi( q );
if( opt.cid_enabled != 0 && opt.cid_enabled != 1 )
goto usage;
}
else if( strcmp( p, "cid_val" ) == 0 )
{
opt.cid_val = q;
}
#endif /* MBEDTLS_SSL_CID */
else if( strcmp( p, "psk" ) == 0 )
opt.psk = q;
else if( strcmp( p, "psk_identity" ) == 0 )
@ -1882,6 +1915,24 @@ int main( int argc, char *argv[] )
}
}
#if defined(MBEDTLS_SSL_CID)
if( strlen( opt.cid_val ) )
{
cid_len = strlen( opt.cid_val ) / 2;
if( cid_len > sizeof( cid ) )
{
mbedtls_printf( "CID too long\n" );
goto exit;
}
if( unhexify( cid, opt.cid_val, &cid_len ) != 0 )
{
mbedtls_printf( "CID not valid hex\n" );
goto exit;
}
}
#endif /* MBEDTLS_SSL_CID */
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
/*
* Unhexify the pre-shared key and parse the list if any given
@ -2561,6 +2612,19 @@ int main( int argc, char *argv[] )
mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv,
opt.nbio == 0 ? mbedtls_net_recv_timeout : NULL );
#if defined(MBEDTLS_SSL_CID)
if( opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
{
if( ( ret = mbedtls_ssl_set_cid( &ssl, opt.cid_enabled,
cid, cid_len ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_set_cid returned %d\n\n",
ret );
goto exit;
}
}
#endif /* MBEDTLS_SSL_CID */
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( opt.dtls_mtu != DFL_DTLS_MTU )
mbedtls_ssl_set_mtu( &ssl, opt.dtls_mtu );
@ -2786,6 +2850,37 @@ handshake:
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_CID)
if( opt.transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
{
unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ];
size_t peer_cid_len;
int cid_negotiated;
/* Check if the use of a CID has been negotiated */
ret = mbedtls_ssl_get_peer_cid( &ssl, &cid_negotiated,
peer_cid, &peer_cid_len );
if( ret != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ssl_get_peer_cid returned -0x%x\n\n",
-ret );
goto exit;
}
if( cid_negotiated == MBEDTLS_SSL_CID_DISABLED )
{
if( opt.cid_enabled == MBEDTLS_SSL_CID_ENABLED )
{
mbedtls_printf( "Use of Connection ID was rejected by the client.\n" );
}
}
else
{
mbedtls_printf( "Use of Connection ID has been negotiated.\n" );
}
}
#endif /* MBEDTLS_SSL_CID */
if( opt.exchanges == 0 )
goto close_notify;