26 #if !defined(POLARSSL_CONFIG_FILE)
29 #include POLARSSL_CONFIG_FILE
32 #if defined(POLARSSL_SSL_SRV_C)
36 #if defined(POLARSSL_ECP_C)
40 #if defined(POLARSSL_PLATFORM_C)
43 #define polarssl_malloc malloc
44 #define polarssl_free free
50 #if defined(POLARSSL_HAVE_TIME)
54 #if defined(POLARSSL_SSL_SESSION_TICKETS)
56 static void polarssl_zeroize(
void *v,
size_t n ) {
57 volatile unsigned char *p = v;
while( n-- ) *p++ = 0;
68 static int ssl_save_session(
const ssl_session *session,
69 unsigned char *buf,
size_t buf_len,
72 unsigned char *p = buf;
73 size_t left = buf_len;
74 #if defined(POLARSSL_X509_CRT_PARSE_C)
85 #if defined(POLARSSL_X509_CRT_PARSE_C)
91 if( left < 3 + cert_len )
94 *p++ = (
unsigned char)( cert_len >> 16 & 0xFF );
95 *p++ = (
unsigned char)( cert_len >> 8 & 0xFF );
96 *p++ = (
unsigned char)( cert_len & 0xFF );
113 const unsigned char *buf,
size_t len )
115 const unsigned char *p = buf;
116 const unsigned char *
const end = buf + len;
117 #if defined(POLARSSL_X509_CRT_PARSE_C)
127 #if defined(POLARSSL_X509_CRT_PARSE_C)
131 cert_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2];
142 if( p + cert_len > end )
153 p, cert_len ) ) != 0 )
183 static int ssl_write_ticket(
ssl_context *ssl,
size_t *tlen )
186 unsigned char *
const start = ssl->
out_msg + 10;
187 unsigned char *p = start;
188 unsigned char *state;
189 unsigned char iv[16];
190 size_t clear_len, enc_len, pad_len, i;
202 if( ( ret = ssl->
f_rng( ssl->
p_rng, p, 16 ) ) != 0 )
220 SSL_DEBUG_BUF( 3,
"session ticket cleartext", state, clear_len );
223 pad_len = 16 - clear_len % 16;
224 enc_len = clear_len + pad_len;
225 for( i = clear_len; i < enc_len; i++ )
226 state[i] = (
unsigned char) pad_len;
230 enc_len, iv, state, state ) ) != 0 )
236 *p++ = (
unsigned char)( ( enc_len >> 8 ) & 0xFF );
237 *p++ = (
unsigned char)( ( enc_len ) & 0xFF );
246 SSL_DEBUG_BUF( 3,
"session ticket structure", start, *tlen );
260 unsigned char *key_name = buf;
261 unsigned char *iv = buf + 16;
262 unsigned char *enc_len_p = iv + 16;
263 unsigned char *ticket = enc_len_p + 2;
265 unsigned char computed_mac[32];
266 size_t enc_len, clear_len, i;
267 unsigned char pad_len, diff;
271 if( len < 34 || ssl->ticket_keys == NULL )
274 enc_len = ( enc_len_p[0] << 8 ) | enc_len_p[1];
275 mac = ticket + enc_len;
277 if( len != enc_len + 66 )
282 for( i = 0; i < 16; i++ )
290 for( i = 0; i < 32; i++ )
291 diff |= mac[i] ^ computed_mac[i];
300 enc_len, iv, ticket, ticket ) ) != 0 )
306 pad_len = ticket[enc_len - 1];
309 for( i = 2; i < pad_len; i++ )
310 if( ticket[enc_len - i] != pad_len )
315 clear_len = enc_len - pad_len;
317 SSL_DEBUG_BUF( 3,
"session ticket cleartext", ticket, clear_len );
320 if( ( ret = ssl_load_session( &session, ticket, clear_len ) ) != 0 )
327 #if defined(POLARSSL_HAVE_TIME)
348 polarssl_zeroize( &session,
sizeof(
ssl_session ) );
354 #if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
360 const unsigned char*
name,
size_t len )
366 ret = ssl->
f_sni( ssl->
p_sni, ssl, name, len );
374 static int ssl_parse_servername_ext(
ssl_context *ssl,
375 const unsigned char *buf,
379 size_t servername_list_size, hostname_len;
380 const unsigned char *p;
384 servername_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
385 if( servername_list_size + 2 != len )
392 while( servername_list_size > 0 )
394 hostname_len = ( ( p[1] << 8 ) | p[2] );
395 if( hostname_len + 3 > servername_list_size )
403 ret = ssl_sni_wrapper( ssl, p + 3, hostname_len );
414 servername_list_size -= hostname_len + 3;
415 p += hostname_len + 3;
418 if( servername_list_size != 0 )
428 static int ssl_parse_renegotiation_info(
ssl_context *ssl,
429 const unsigned char *buf,
436 if( len != 1 || buf[0] != 0x0 )
438 SSL_DEBUG_MSG( 1, (
"non-zero length renegotiated connection field" ) );
456 SSL_DEBUG_MSG( 1, (
"non-matching renegotiated connection field" ) );
468 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
469 static int ssl_parse_signature_algorithms_ext(
ssl_context *ssl,
470 const unsigned char *buf,
473 size_t sig_alg_list_size;
474 const unsigned char *p;
475 const unsigned char *end = buf + len;
479 sig_alg_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
480 if( sig_alg_list_size + 2 != len ||
481 sig_alg_list_size % 2 != 0 )
494 for( p = buf + 2; p < end; p += 2 ) {
502 SSL_DEBUG_MSG( 3, (
"client hello v3, signature_algorithm ext: %d",
509 #if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
510 static int ssl_parse_supported_elliptic_curves(
ssl_context *ssl,
511 const unsigned char *buf,
514 size_t list_size, our_size;
515 const unsigned char *p;
518 list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
519 if( list_size + 2 != len ||
528 our_size = list_size / 2 + 1;
532 if( ( curves =
polarssl_malloc( our_size *
sizeof( *curves ) ) ) == NULL )
536 memset( (
void *) curves, 0, our_size *
sizeof( *curves ) );
540 while( list_size > 0 && our_size > 1 )
544 if( curve_info != NULL )
546 *curves++ = curve_info;
557 static int ssl_parse_supported_point_formats(
ssl_context *ssl,
558 const unsigned char *buf,
562 const unsigned char *p;
565 if( list_size + 1 != len )
572 while( list_size > 0 )
590 #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
591 static int ssl_parse_max_fragment_length_ext(
ssl_context *ssl,
592 const unsigned char *buf,
607 #if defined(POLARSSL_SSL_TRUNCATED_HMAC)
608 static int ssl_parse_truncated_hmac_ext(
ssl_context *ssl,
609 const unsigned char *buf,
626 #if defined(POLARSSL_SSL_SESSION_TICKETS)
627 static int ssl_parse_session_ticket_ext(
ssl_context *ssl,
653 if( ( ret = ssl_parse_ticket( ssl, buf, len ) ) != 0 )
659 SSL_DEBUG_MSG( 3, (
"session successfully restored from ticket" ) );
670 #if defined(POLARSSL_SSL_ALPN)
672 const unsigned char *buf,
size_t len )
674 size_t list_len, cur_len, ours_len;
675 const unsigned char *theirs, *start, *end;
694 list_len = ( buf[0] << 8 ) | buf[1];
695 if( list_len != len - 2 )
703 for( ours = ssl->
alpn_list; *ours != NULL; ours++ )
705 ours_len = strlen( *ours );
706 for( theirs = start; theirs != end; theirs += cur_len )
718 if( cur_len == ours_len &&
719 memcmp( theirs, *ours, cur_len ) == 0 )
738 #if defined(POLARSSL_X509_CRT_PARSE_C)
742 #if defined(POLARSSL_ECDSA_C)
743 static int ssl_key_matches_curves(
pk_context *pk,
749 while( *crv != NULL )
751 if( (*crv)->grp_id == grp_id )
770 #if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
780 for( cur = list; cur != NULL; cur = cur->
next )
799 #if defined(POLARSSL_ECDSA_C)
822 static int ssl_ciphersuite_match(
ssl_context *ssl,
int suite_id,
828 if( suite_info == NULL )
830 SSL_DEBUG_MSG( 1, (
"ciphersuite info for %04x not found", suite_id ) );
838 #if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
845 #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED)
849 ssl->
f_psk == NULL &&
855 #if defined(POLARSSL_X509_CRT_PARSE_C)
863 if( ssl_pick_cert( ssl, suite_info ) != 0 )
867 *ciphersuite_info = suite_info;
871 #if defined(POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
872 static int ssl_parse_client_hello_v2(
ssl_context *ssl )
877 unsigned int ciph_len, sess_len, chal_len;
878 unsigned char *buf, *p;
879 const int *ciphersuites;
886 SSL_DEBUG_MSG( 1, (
"client hello v2 illegal for renegotiation" ) );
901 ( ( buf[0] & 0x7F ) << 8 ) | buf[1] ) );
902 SSL_DEBUG_MSG( 3, (
"client hello v2, max. version: [%d:%d]",
922 n = ( ( buf[0] << 8 ) | buf[1] ) & 0x7FFF;
924 if( n < 17 || n > 512 )
936 SSL_DEBUG_MSG( 1, (
"client only supports ssl smaller than minimum"
937 " [%d:%d] < [%d:%d]",
970 ciph_len = ( buf[0] << 8 ) | buf[1];
971 sess_len = ( buf[2] << 8 ) | buf[3];
972 chal_len = ( buf[4] << 8 ) | buf[5];
974 SSL_DEBUG_MSG( 3, (
"ciph_len: %d, sess_len: %d, chal_len: %d",
975 ciph_len, sess_len, chal_len ) );
980 if( ciph_len < 3 || ( ciph_len % 3 ) != 0 )
992 if( chal_len < 8 || chal_len > 32 )
998 if( n != 6 + ciph_len + sess_len + chal_len )
1005 buf + 6, ciph_len );
1007 buf + 6 + ciph_len, sess_len );
1009 buf + 6 + ciph_len + sess_len, chal_len );
1011 p = buf + 6 + ciph_len;
1024 for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
1028 SSL_DEBUG_MSG( 3, (
"received TLS_EMPTY_RENEGOTIATION_INFO " ) );
1031 SSL_DEBUG_MSG( 1, (
"received RENEGOTIATION SCSV during renegotiation" ) );
1044 ciphersuite_info = NULL;
1045 #if defined(POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
1046 for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
1048 for( i = 0; ciphersuites[i] != 0; i++ )
1050 for( i = 0; ciphersuites[i] != 0; i++ )
1052 for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
1056 p[1] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
1057 p[2] != ( ( ciphersuites[i] ) & 0xFF ) )
1060 if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
1061 &ciphersuite_info ) ) != 0 )
1064 if( ciphersuite_info != NULL )
1065 goto have_ciphersuite_v2;
1073 have_ciphersuite_v2:
1084 SSL_DEBUG_MSG( 1, (
"legacy renegotiation, breaking off handshake" ) );
1101 static int ssl_parse_client_hello(
ssl_context *ssl )
1106 unsigned int ciph_len, sess_len;
1107 unsigned int comp_len;
1108 unsigned int ext_len = 0;
1109 unsigned char *buf, *p, *ext;
1110 int renegotiation_info_seen = 0;
1111 int handshake_failure = 0;
1112 const int *ciphersuites;
1126 #if defined(POLARSSL_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
1127 if( ( buf[0] & 0x80 ) != 0 )
1128 return ssl_parse_client_hello_v2( ssl );
1136 ( buf[3] << 8 ) | buf[4] ) );
1137 SSL_DEBUG_MSG( 3, (
"client hello v3, protocol ver: [%d:%d]",
1160 n = ( buf[3] << 8 ) | buf[4];
1203 ( buf[1] << 16 ) | ( buf[2] << 8 ) | buf[3] ) );
1204 SSL_DEBUG_MSG( 3, (
"client hello v3, max. version: [%d:%d]",
1225 SSL_DEBUG_MSG( 1, (
"client only supports ssl smaller than minimum"
1226 " [%d:%d] < [%d:%d]",
1249 if( buf[1] != 0 || n != (
unsigned int) 4 + ( ( buf[2] << 8 ) | buf[3] ) )
1260 if( sess_len > 32 || sess_len > n - 42 )
1275 ciph_len = ( buf[39 + sess_len] << 8 )
1276 | ( buf[40 + sess_len] );
1278 if( ciph_len < 2 || ( ciph_len % 2 ) != 0 || ciph_len > n - 42 - sess_len )
1287 comp_len = buf[41 + sess_len + ciph_len];
1289 if( comp_len < 1 || comp_len > 16 ||
1290 comp_len > n - 42 - sess_len - ciph_len )
1299 if( n > 42 + sess_len + ciph_len + comp_len )
1301 ext_len = ( buf[42 + sess_len + ciph_len + comp_len] << 8 )
1302 | ( buf[43 + sess_len + ciph_len + comp_len] );
1304 if( ( ext_len > 0 && ext_len < 4 ) ||
1305 n != 44 + sess_len + ciph_len + comp_len + ext_len )
1308 SSL_DEBUG_BUF( 3,
"Ext", buf + 44 + sess_len + ciph_len + comp_len, ext_len);
1314 #if defined(POLARSSL_ZLIB_SUPPORT)
1315 for( i = 0; i < comp_len; ++i )
1328 buf + 38, sess_len );
1330 buf + 41 + sess_len, ciph_len );
1332 buf + 42 + sess_len + ciph_len, comp_len );
1337 for( i = 0, p = buf + 41 + sess_len; i < ciph_len; i += 2, p += 2 )
1341 SSL_DEBUG_MSG( 3, (
"received TLS_EMPTY_RENEGOTIATION_INFO " ) );
1344 SSL_DEBUG_MSG( 1, (
"received RENEGOTIATION SCSV during renegotiation" ) );
1356 ext = buf + 44 + sess_len + ciph_len + comp_len;
1360 unsigned int ext_id = ( ( ext[0] << 8 )
1362 unsigned int ext_size = ( ( ext[2] << 8 )
1365 if( ext_size + 4 > ext_len )
1372 #if defined(POLARSSL_SSL_SERVER_NAME_INDICATION)
1375 if( ssl->
f_sni == NULL )
1378 ret = ssl_parse_servername_ext( ssl, ext + 4, ext_size );
1386 renegotiation_info_seen = 1;
1388 ret = ssl_parse_renegotiation_info( ssl, ext + 4, ext_size );
1393 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
1395 SSL_DEBUG_MSG( 3, (
"found signature_algorithms extension" ) );
1399 ret = ssl_parse_signature_algorithms_ext( ssl, ext + 4, ext_size );
1405 #if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
1407 SSL_DEBUG_MSG( 3, (
"found supported elliptic curves extension" ) );
1409 ret = ssl_parse_supported_elliptic_curves( ssl, ext + 4, ext_size );
1415 SSL_DEBUG_MSG( 3, (
"found supported point formats extension" ) );
1418 ret = ssl_parse_supported_point_formats( ssl, ext + 4, ext_size );
1424 #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
1426 SSL_DEBUG_MSG( 3, (
"found max fragment length extension" ) );
1428 ret = ssl_parse_max_fragment_length_ext( ssl, ext + 4, ext_size );
1434 #if defined(POLARSSL_SSL_TRUNCATED_HMAC)
1438 ret = ssl_parse_truncated_hmac_ext( ssl, ext + 4, ext_size );
1444 #if defined(POLARSSL_SSL_SESSION_TICKETS)
1448 ret = ssl_parse_session_ticket_ext( ssl, ext + 4, ext_size );
1454 #if defined(POLARSSL_SSL_ALPN)
1458 ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size );
1465 SSL_DEBUG_MSG( 3, (
"unknown extension found: %d (ignoring)",
1469 ext_len -= 4 + ext_size;
1470 ext += 4 + ext_size;
1472 if( ext_len > 0 && ext_len < 4 )
1485 SSL_DEBUG_MSG( 1, (
"legacy renegotiation, breaking off handshake" ) );
1486 handshake_failure = 1;
1490 renegotiation_info_seen == 0 )
1492 SSL_DEBUG_MSG( 1, (
"renegotiation_info extension missing (secure)" ) );
1493 handshake_failure = 1;
1500 handshake_failure = 1;
1504 renegotiation_info_seen == 1 )
1506 SSL_DEBUG_MSG( 1, (
"renegotiation_info extension present (legacy)" ) );
1507 handshake_failure = 1;
1510 if( handshake_failure == 1 )
1524 ciphersuite_info = NULL;
1525 #if defined(POLARSSL_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
1526 for( j = 0, p = buf + 41 + sess_len; j < ciph_len; j += 2, p += 2 )
1528 for( i = 0; ciphersuites[i] != 0; i++ )
1530 for( i = 0; ciphersuites[i] != 0; i++ )
1532 for( j = 0, p = buf + 41 + sess_len; j < ciph_len; j += 2, p += 2 )
1535 if( p[0] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
1536 p[1] != ( ( ciphersuites[i] ) & 0xFF ) )
1539 if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
1540 &ciphersuite_info ) ) != 0 )
1543 if( ciphersuite_info != NULL )
1544 goto have_ciphersuite;
1568 #if defined(POLARSSL_SSL_TRUNCATED_HMAC)
1569 static void ssl_write_truncated_hmac_ext(
ssl_context *ssl,
1573 unsigned char *p = buf;
1581 SSL_DEBUG_MSG( 3, (
"server hello, adding truncated hmac extension" ) );
1593 #if defined(POLARSSL_SSL_SESSION_TICKETS)
1594 static void ssl_write_session_ticket_ext(
ssl_context *ssl,
1598 unsigned char *p = buf;
1606 SSL_DEBUG_MSG( 3, (
"server hello, adding session ticket extension" ) );
1618 static void ssl_write_renegotiation_ext(
ssl_context *ssl,
1622 unsigned char *p = buf;
1630 SSL_DEBUG_MSG( 3, (
"server hello, secure renegotiation extension" ) );
1647 #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
1648 static void ssl_write_max_fragment_length_ext(
ssl_context *ssl,
1652 unsigned char *p = buf;
1660 SSL_DEBUG_MSG( 3, (
"server hello, max_fragment_length extension" ) );
1674 #if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
1675 static void ssl_write_supported_point_formats_ext(
ssl_context *ssl,
1679 unsigned char *p = buf;
1689 SSL_DEBUG_MSG( 3, (
"server hello, supported_point_formats extension" ) );
1704 #if defined(POLARSSL_SSL_ALPN )
1706 unsigned char *buf,
size_t *olen )
1714 SSL_DEBUG_MSG( 3, (
"server hello, adding alpn extension" ) );
1723 buf[0] = (
unsigned char)( (
TLS_EXT_ALPN >> 8 ) & 0xFF );
1728 buf[2] = (
unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
1729 buf[3] = (
unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
1731 buf[4] = (
unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
1732 buf[5] = (
unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
1734 buf[6] = (
unsigned char)( ( ( *olen - 7 ) ) & 0xFF );
1740 static int ssl_write_server_hello(
ssl_context *ssl )
1742 #if defined(POLARSSL_HAVE_TIME)
1746 size_t olen, ext_len = 0, n;
1747 unsigned char *buf, *p;
1751 if( ssl->
f_rng == NULL )
1770 SSL_DEBUG_MSG( 3, (
"server hello, chosen version: [%d:%d]",
1773 #if defined(POLARSSL_HAVE_TIME)
1775 *p++ = (
unsigned char)( t >> 24 );
1776 *p++ = (
unsigned char)( t >> 16 );
1777 *p++ = (
unsigned char)( t >> 8 );
1778 *p++ = (
unsigned char)( t );
1780 SSL_DEBUG_MSG( 3, (
"server hello, current time: %lu", t ) );
1782 if( ( ret = ssl->
f_rng( ssl->
p_rng, p, 4 ) ) != 0 )
1788 if( ( ret = ssl->
f_rng( ssl->
p_rng, p, 28 ) ) != 0 )
1795 SSL_DEBUG_BUF( 3,
"server hello, random bytes", buf + 6, 32 );
1808 SSL_DEBUG_MSG( 3, (
"session successfully restored from cache" ) );
1820 #if defined(POLARSSL_HAVE_TIME)
1824 #if defined(POLARSSL_SSL_SESSION_TICKETS)
1866 SSL_DEBUG_MSG( 3, (
"server hello, session id len.: %d", n ) );
1867 SSL_DEBUG_BUF( 3,
"server hello, session id", buf + 39, n );
1883 ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
1886 #if defined(POLARSSL_SSL_MAX_FRAGMENT_LENGTH)
1887 ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen );
1891 #if defined(POLARSSL_SSL_TRUNCATED_HMAC)
1892 ssl_write_truncated_hmac_ext( ssl, p + 2 + ext_len, &olen );
1896 #if defined(POLARSSL_SSL_SESSION_TICKETS)
1897 ssl_write_session_ticket_ext( ssl, p + 2 + ext_len, &olen );
1901 #if defined(POLARSSL_ECDH_C) || defined(POLARSSL_ECDSA_C)
1902 ssl_write_supported_point_formats_ext( ssl, p + 2 + ext_len, &olen );
1906 #if defined(POLARSSL_SSL_ALPN)
1907 ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
1911 SSL_DEBUG_MSG( 3, (
"server hello, total extension length: %d", ext_len ) );
1915 *p++ = (
unsigned char)( ( ext_len >> 8 ) & 0xFF );
1916 *p++ = (
unsigned char)( ( ext_len ) & 0xFF );
1931 #if !defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) && \
1932 !defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
1933 !defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
1934 !defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
1935 static int ssl_write_certificate_request(
ssl_context *ssl )
1946 SSL_DEBUG_MSG( 2, (
"<= skip write certificate request" ) );
1955 static int ssl_write_certificate_request(
ssl_context *ssl )
1959 size_t dn_size, total_dn_size;
1960 size_t ct_len, sa_len;
1961 unsigned char *buf, *p;
1974 SSL_DEBUG_MSG( 2, (
"<= skip write certificate request" ) );
2001 #if defined(POLARSSL_RSA_C)
2004 #if defined(POLARSSL_ECDSA_C)
2008 p[0] = (
unsigned char) ct_len++;
2012 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
2043 #if defined(POLARSSL_RSA_C)
2047 #if defined(POLARSSL_ECDSA_C)
2052 p[0] = (
unsigned char)( sa_len >> 8 );
2053 p[1] = (
unsigned char)( sa_len );
2067 while( crt != NULL && crt->
version != 0 )
2069 if( p - buf > 4096 )
2073 *p++ = (
unsigned char)( dn_size >> 8 );
2074 *p++ = (
unsigned char)( dn_size );
2080 total_dn_size += 2 + dn_size;
2087 ssl->
out_msg[4 + ct_len + sa_len] = (
unsigned char)( total_dn_size >> 8 );
2088 ssl->
out_msg[5 + ct_len + sa_len] = (
unsigned char)( total_dn_size );
2101 #if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
2102 defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
2103 static int ssl_get_ecdh_params_from_cert(
ssl_context *ssl )
2126 static int ssl_write_server_key_exchange(
ssl_context *ssl )
2133 #if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
2134 defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED) || \
2135 defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
2136 defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
2137 defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
2138 unsigned char *p = ssl->
out_msg + 4;
2139 unsigned char *dig_signed = p;
2140 size_t dig_signed_len = 0, len;
2141 ((void) dig_signed);
2142 ((void) dig_signed_len);
2147 #if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) || \
2148 defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED) || \
2149 defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
2154 SSL_DEBUG_MSG( 2, (
"<= skip write server key exchange" ) );
2160 #if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
2161 defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
2165 ssl_get_ecdh_params_from_cert( ssl );
2167 SSL_DEBUG_MSG( 2, (
"<= skip write server key exchange" ) );
2173 #if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED) || \
2174 defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
2187 #if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
2188 defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
2217 dig_signed_len = len;
2230 #if defined(POLARSSL_KEY_EXCHANGE__SOME__ECDHE_ENABLED)
2244 #if defined(POLARSSL_SSL_SET_CURVES)
2250 if( (*curve)->grp_id == *gid )
2251 goto curve_matching_done;
2253 curve_matching_done:
2258 if( *curve == NULL )
2267 (*curve)->grp_id ) ) != 0 )
2274 p, SSL_MAX_CONTENT_LEN - n,
2282 dig_signed_len = len;
2291 #if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
2292 defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
2293 defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
2298 size_t signature_len = 0;
2299 unsigned int hashlen = 0;
2300 unsigned char hash[64];
2306 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
2319 #if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
2320 defined(POLARSSL_SSL_PROTO_TLS1_1)
2335 #if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
2336 defined(POLARSSL_SSL_PROTO_TLS1_1)
2360 md5_update( &md5, dig_signed, dig_signed_len );
2376 #if defined(POLARSSL_SSL_PROTO_TLS1) || defined(POLARSSL_SSL_PROTO_TLS1_1) || \
2377 defined(POLARSSL_SSL_PROTO_TLS1_2)
2403 md_update( &ctx, dig_signed, dig_signed_len );
2415 SSL_DEBUG_BUF( 3,
"parameters hash", hash, hashlen != 0 ? hashlen :
2427 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
2438 p + 2 , &signature_len,
2445 *(p++) = (
unsigned char)( signature_len >> 8 );
2446 *(p++) = (
unsigned char)( signature_len );
2475 static int ssl_write_server_hello_done(
ssl_context *ssl )
2498 #if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
2499 defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
2500 static int ssl_parse_client_dh_public(
ssl_context *ssl,
unsigned char **p,
2501 const unsigned char *end )
2515 n = ( (*p)[0] << 8 ) | (*p)[1];
2539 #if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) || \
2540 defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
2541 static int ssl_parse_encrypted_pms(
ssl_context *ssl,
2542 const unsigned char *p,
2543 const unsigned char *end,
2559 #if defined(POLARSSL_SSL_PROTO_TLS1) || defined(POLARSSL_SSL_PROTO_TLS1_1) || \
2560 defined(POLARSSL_SSL_PROTO_TLS1_2)
2563 if( *p++ != ( ( len >> 8 ) & 0xFF ) ||
2564 *p++ != ( ( len ) & 0xFF ) )
2572 if( p + len != end )
2607 #if defined(POLARSSL_KEY_EXCHANGE__SOME__PSK_ENABLED)
2608 static int ssl_parse_client_psk_identity(
ssl_context *ssl,
unsigned char **p,
2609 const unsigned char *end )
2614 if( ssl->
f_psk == NULL &&
2631 n = ( (*p)[0] << 8 ) | (*p)[1];
2634 if( n < 1 || n > 65535 || *p + n > end )
2640 if( ssl->
f_psk != NULL )
2642 if( ssl->
f_psk( ssl->
p_psk, ssl, *p, n ) != 0 )
2675 static int ssl_parse_client_key_exchange(
ssl_context *ssl )
2702 #if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED)
2705 unsigned char *p = ssl->
in_msg + 4;
2708 if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
2735 #if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
2736 defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
2737 defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
2738 defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
2770 #if defined(POLARSSL_KEY_EXCHANGE_PSK_ENABLED)
2773 unsigned char *p = ssl->
in_msg + 4;
2776 if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
2778 SSL_DEBUG_RET( 1, (
"ssl_parse_client_psk_identity" ), ret );
2797 #if defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED)
2800 unsigned char *p = ssl->
in_msg + 4;
2803 if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
2805 SSL_DEBUG_RET( 1, (
"ssl_parse_client_psk_identity" ), ret );
2809 if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 2 ) ) != 0 )
2824 #if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED)
2827 unsigned char *p = ssl->
in_msg + 4;
2830 if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
2832 SSL_DEBUG_RET( 1, (
"ssl_parse_client_psk_identity" ), ret );
2835 if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
2856 #if defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
2859 unsigned char *p = ssl->
in_msg + 4;
2862 if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
2864 SSL_DEBUG_RET( 1, (
"ssl_parse_client_psk_identity" ), ret );
2869 p, end - p ) ) != 0 )
2886 #if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED)
2889 if( ( ret = ssl_parse_encrypted_pms( ssl,
2894 SSL_DEBUG_RET( 1, (
"ssl_parse_parse_encrypted_pms_secret" ), ret );
2918 #if !defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) && \
2919 !defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) && \
2920 !defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) && \
2921 !defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
2922 static int ssl_parse_certificate_verify(
ssl_context *ssl )
2942 static int ssl_parse_certificate_verify(
ssl_context *ssl )
2945 size_t sa_len, sig_len;
2946 unsigned char hash[48];
2947 unsigned char *hash_start = hash;
2949 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
3004 #if defined(POLARSSL_SSL_PROTO_SSL3) || defined(POLARSSL_SSL_PROTO_TLS1) || \
3005 defined(POLARSSL_SSL_PROTO_TLS1_1)
3025 #if defined(POLARSSL_SSL_PROTO_TLS1_2)
3035 SSL_DEBUG_MSG( 1, (
"peer not adhering to requested sig_alg"
3036 " for verify message" ) );
3051 SSL_DEBUG_MSG( 1, (
"peer not adhering to requested sig_alg"
3052 " for verify message" ) );
3072 sig_len = ( ssl->
in_msg[4 + sa_len] << 8 ) | ssl->
in_msg[5 + sa_len];
3074 if( sa_len + sig_len + 6 != ssl->
in_hslen )
3081 md_alg, hash_start, hashlen,
3082 ssl->
in_msg + 6 + sa_len, sig_len ) ) != 0 )
3096 #if defined(POLARSSL_SSL_SESSION_TICKETS)
3097 static int ssl_write_new_session_ticket(
ssl_context *ssl )
3119 ssl->
out_msg[4] = ( lifetime >> 24 ) & 0xFF;
3120 ssl->
out_msg[5] = ( lifetime >> 16 ) & 0xFF;
3121 ssl->
out_msg[6] = ( lifetime >> 8 ) & 0xFF;
3122 ssl->
out_msg[7] = ( lifetime ) & 0xFF;
3124 if( ( ret = ssl_write_ticket( ssl, &tlen ) ) != 0 )
3130 ssl->
out_msg[8] = (
unsigned char)( ( tlen >> 8 ) & 0xFF );
3131 ssl->
out_msg[9] = (
unsigned char)( ( tlen ) & 0xFF );
3168 switch( ssl->
state )
3178 ret = ssl_parse_client_hello( ssl );
3189 ret = ssl_write_server_hello( ssl );
3197 ret = ssl_write_server_key_exchange( ssl );
3201 ret = ssl_write_certificate_request( ssl );
3205 ret = ssl_write_server_hello_done( ssl );
3220 ret = ssl_parse_client_key_exchange( ssl );
3224 ret = ssl_parse_certificate_verify( ssl );
3241 #if defined(POLARSSL_SSL_SESSION_TICKETS)
3243 ret = ssl_write_new_session_ticket( ssl );