diff options
Diffstat (limited to 'polarssl/src/library/ssl_cli.c')
| -rw-r--r-- | polarssl/src/library/ssl_cli.c | 1130 |
1 files changed, 0 insertions, 1130 deletions
diff --git a/polarssl/src/library/ssl_cli.c b/polarssl/src/library/ssl_cli.c deleted file mode 100644 index 99120d5..0000000 --- a/polarssl/src/library/ssl_cli.c +++ /dev/null @@ -1,1130 +0,0 @@ -/* - * SSLv3/TLSv1 client-side functions - * - * Copyright (C) 2006-2012, Brainspark B.V. - * - * This file is part of PolarSSL (http://www.polarssl.org) - * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> - * - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "polarssl/config.h" - -#if defined(POLARSSL_SSL_CLI_C) - -#include "polarssl/debug.h" -#include "polarssl/ssl.h" - -#if defined(POLARSSL_PKCS11_C) -#include "polarssl/pkcs11.h" -#endif /* defined(POLARSSL_PKCS11_C) */ - -#include <stdlib.h> -#include <stdio.h> -#include <time.h> - -#if defined(POLARSSL_SHA4_C) -#include "polarssl/sha4.h" -#endif - -static int ssl_write_client_hello( ssl_context *ssl ) -{ - int ret; - size_t i, n, ext_len = 0; - unsigned char *buf; - unsigned char *p; - time_t t; - unsigned char sig_alg_list[20]; - size_t sig_alg_len = 0; - - SSL_DEBUG_MSG( 2, ( "=> write client hello" ) ); - - ssl->major_ver = SSL_MAJOR_VERSION_3; - ssl->minor_ver = SSL_MINOR_VERSION_0; - - if( ssl->max_major_ver == 0 && ssl->max_minor_ver == 0 ) - { - ssl->max_major_ver = SSL_MAJOR_VERSION_3; - ssl->max_minor_ver = SSL_MINOR_VERSION_3; - } - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 5 highest version supported - * 6 . 9 current UNIX time - * 10 . 37 random bytes - */ - buf = ssl->out_msg; - p = buf + 4; - - *p++ = (unsigned char) ssl->max_major_ver; - *p++ = (unsigned char) ssl->max_minor_ver; - - SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]", - buf[4], buf[5] ) ); - - t = time( NULL ); - *p++ = (unsigned char)( t >> 24 ); - *p++ = (unsigned char)( t >> 16 ); - *p++ = (unsigned char)( t >> 8 ); - *p++ = (unsigned char)( t ); - - SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) ); - - if( ( ret = ssl->f_rng( ssl->p_rng, p, 28 ) ) != 0 ) - return( ret ); - - p += 28; - - memcpy( ssl->randbytes, buf + 6, 32 ); - - SSL_DEBUG_BUF( 3, "client hello, random bytes", buf + 6, 32 ); - - /* - * 38 . 38 session id length - * 39 . 39+n session id - * 40+n . 41+n ciphersuitelist length - * 42+n . .. ciphersuitelist - * .. . .. compression methods length - * .. . .. compression methods - * .. . .. extensions length - * .. . .. extensions - */ - n = ssl->session->length; - - if( n < 16 || n > 32 || ssl->resume == 0 || - ( ssl->timeout != 0 && t - ssl->session->start > ssl->timeout ) ) - n = 0; - - *p++ = (unsigned char) n; - - for( i = 0; i < n; i++ ) - *p++ = ssl->session->id[i]; - - SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) ); - SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n ); - - for( n = 0; ssl->ciphersuites[n] != 0; n++ ); - *p++ = (unsigned char)( n >> 7 ); - *p++ = (unsigned char)( n << 1 ); - - SSL_DEBUG_MSG( 3, ( "client hello, got %d ciphersuites", n ) ); - - for( i = 0; i < n; i++ ) - { - SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %2d", - ssl->ciphersuites[i] ) ); - - *p++ = (unsigned char)( ssl->ciphersuites[i] >> 8 ); - *p++ = (unsigned char)( ssl->ciphersuites[i] ); - } - - SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 1 ) ); - SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d", 0 ) ); - - *p++ = 1; - *p++ = SSL_COMPRESS_NULL; - - if ( ssl->hostname != NULL ) - { - SSL_DEBUG_MSG( 3, ( "client hello, prepping for server name extension: %s", - ssl->hostname ) ); - - ext_len += ssl->hostname_len + 9; - } - - /* - * Prepare signature_algorithms extension (TLS 1.2) - */ - if( ssl->max_minor_ver == SSL_MINOR_VERSION_3 ) - { -#if defined(POLARSSL_SHA4_C) - sig_alg_list[sig_alg_len++] = SSL_HASH_SHA512; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; - sig_alg_list[sig_alg_len++] = SSL_HASH_SHA384; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; -#endif -#if defined(POLARSSL_SHA2_C) - sig_alg_list[sig_alg_len++] = SSL_HASH_SHA256; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; - sig_alg_list[sig_alg_len++] = SSL_HASH_SHA224; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; -#endif -#if defined(POLARSSL_SHA1_C) - sig_alg_list[sig_alg_len++] = SSL_HASH_SHA1; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; -#endif -#if defined(POLARSSL_MD5_C) - sig_alg_list[sig_alg_len++] = SSL_HASH_MD5; - sig_alg_list[sig_alg_len++] = SSL_SIG_RSA; -#endif - ext_len = 6 + sig_alg_len; - } - - SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d", - ext_len ) ); - - *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ext_len ) & 0xFF ); - - if ( ssl->hostname != NULL ) - { - /* - * struct { - * NameType name_type; - * select (name_type) { - * case host_name: HostName; - * } name; - * } ServerName; - * - * enum { - * host_name(0), (255) - * } NameType; - * - * opaque HostName<1..2^16-1>; - * - * struct { - * ServerName server_name_list<1..2^16-1> - * } ServerNameList; - */ - SSL_DEBUG_MSG( 3, ( "client hello, adding server name extension: %s", - ssl->hostname ) ); - - *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME ) & 0xFF ); - - *p++ = (unsigned char)( ( (ssl->hostname_len + 5) >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( (ssl->hostname_len + 5) ) & 0xFF ); - - *p++ = (unsigned char)( ( (ssl->hostname_len + 3) >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( (ssl->hostname_len + 3) ) & 0xFF ); - - *p++ = (unsigned char)( ( TLS_EXT_SERVERNAME_HOSTNAME ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->hostname_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ssl->hostname_len ) & 0xFF ); - - memcpy( p, ssl->hostname, ssl->hostname_len ); - - p += ssl->hostname_len; - } - - if( ssl->max_minor_ver == SSL_MINOR_VERSION_3 ) - { - /* - * enum { - * none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5), - * sha512(6), (255) - * } HashAlgorithm; - * - * enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) } - * SignatureAlgorithm; - * - * struct { - * HashAlgorithm hash; - * SignatureAlgorithm signature; - * } SignatureAndHashAlgorithm; - * - * SignatureAndHashAlgorithm - * supported_signature_algorithms<2..2^16-2>; - */ - SSL_DEBUG_MSG( 3, ( "client hello, adding signature_algorithms extension" ) ); - - *p++ = (unsigned char)( ( TLS_EXT_SIG_ALG >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( TLS_EXT_SIG_ALG ) & 0xFF ); - - *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) ) & 0xFF ); - - *p++ = (unsigned char)( ( sig_alg_len >> 8 ) & 0xFF ); - *p++ = (unsigned char)( ( sig_alg_len ) & 0xFF ); - - memcpy( p, sig_alg_list, sig_alg_len ); - - p += sig_alg_len; - } - - ssl->out_msglen = p - buf; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_CLIENT_HELLO; - - ssl->state++; - - if( ( ret = ssl_write_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_write_record", ret ); - return( ret ); - } - - SSL_DEBUG_MSG( 2, ( "<= write client hello" ) ); - - return( 0 ); -} - -static int ssl_parse_server_hello( ssl_context *ssl ) -{ -#if defined(POLARSSL_DEBUG_C) - time_t t; -#endif - int ret, i; - size_t n; - int ext_len; - unsigned char *buf; - - SSL_DEBUG_MSG( 2, ( "=> parse server hello" ) ); - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 5 protocol version - * 6 . 9 UNIX time() - * 10 . 37 random bytes - */ - buf = ssl->in_msg; - - if( ( ret = ssl_read_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_read_record", ret ); - return( ret ); - } - - if( ssl->in_msgtype != SSL_MSG_HANDSHAKE ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE ); - } - - SSL_DEBUG_MSG( 3, ( "server hello, chosen version: [%d:%d]", - buf[4], buf[5] ) ); - - if( ssl->in_hslen < 42 || - buf[0] != SSL_HS_SERVER_HELLO || - buf[4] != SSL_MAJOR_VERSION_3 ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO ); - } - - if( buf[5] > ssl->max_minor_ver ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO ); - } - - ssl->minor_ver = buf[5]; - -#if defined(POLARSSL_DEBUG_C) - t = ( (time_t) buf[6] << 24 ) - | ( (time_t) buf[7] << 16 ) - | ( (time_t) buf[8] << 8 ) - | ( (time_t) buf[9] ); -#endif - - memcpy( ssl->randbytes + 32, buf + 6, 32 ); - - n = buf[38]; - - SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu", t ) ); - SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 6, 32 ); - - /* - * 38 . 38 session id length - * 39 . 38+n session id - * 39+n . 40+n chosen ciphersuite - * 41+n . 41+n chosen compression alg. - * 42+n . 43+n extensions length - * 44+n . 44+n+m extensions - */ - if( n > 32 || ssl->in_hslen > 42 + n ) - { - ext_len = ( ( buf[42 + n] << 8 ) - | ( buf[43 + n] ) ) + 2; - } - else - { - ext_len = 0; - } - - if( n > 32 || ssl->in_hslen != 42 + n + ext_len ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO ); - } - - i = ( buf[39 + n] << 8 ) | buf[40 + n]; - - /* - * Initialize update checksum functions - */ - ssl_kickstart_checksum( ssl, i, buf, ssl->in_hslen ); - - SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) ); - SSL_DEBUG_BUF( 3, "server hello, session id", buf + 39, n ); - - /* - * Check if the session can be resumed - */ - if( ssl->resume == 0 || n == 0 || - ssl->session->ciphersuite != i || - ssl->session->length != n || - memcmp( ssl->session->id, buf + 39, n ) != 0 ) - { - ssl->state++; - ssl->resume = 0; - ssl->session->start = time( NULL ); - ssl->session->ciphersuite = i; - ssl->session->length = n; - memcpy( ssl->session->id, buf + 39, n ); - } - else - { - ssl->state = SSL_SERVER_CHANGE_CIPHER_SPEC; - - if( ( ret = ssl_derive_keys( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_derive_keys", ret ); - return( ret ); - } - } - - SSL_DEBUG_MSG( 3, ( "%s session has been resumed", - ssl->resume ? "a" : "no" ) ); - - SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %d", i ) ); - SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", buf[41 + n] ) ); - - i = 0; - while( 1 ) - { - if( ssl->ciphersuites[i] == 0 ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO ); - } - - if( ssl->ciphersuites[i++] == ssl->session->ciphersuite ) - break; - } - - if( buf[41 + n] != SSL_COMPRESS_NULL ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO ); - } - - /* TODO: Process extensions */ - - SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) ); - - return( 0 ); -} - -static int ssl_parse_server_key_exchange( ssl_context *ssl ) -{ -#if defined(POLARSSL_DHM_C) - int ret; - size_t n; - unsigned char *p, *end; - unsigned char hash[64]; - md5_context md5; - sha1_context sha1; - int hash_id = SIG_RSA_RAW; - unsigned int hashlen = 0; -#endif - - SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) ); - - if( ssl->session->ciphersuite != SSL_EDH_RSA_DES_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_DES_168_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_128_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_256_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_128_SHA256 && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_256_SHA256 && - ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA && - ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_128_SHA256 && - ssl->session->ciphersuite != SSL_EDH_RSA_CAMELLIA_256_SHA256 && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_128_GCM_SHA256 && - ssl->session->ciphersuite != SSL_EDH_RSA_AES_256_GCM_SHA384 ) - { - SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) ); - ssl->state++; - return( 0 ); - } - -#if !defined(POLARSSL_DHM_C) - SSL_DEBUG_MSG( 1, ( "support for dhm in not available" ) ); - return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE ); -#else - if( ( ret = ssl_read_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_read_record", ret ); - return( ret ); - } - - if( ssl->in_msgtype != SSL_MSG_HANDSHAKE ) - { - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE ); - } - - if( ssl->in_msg[0] != SSL_HS_SERVER_KEY_EXCHANGE ) - { - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - SSL_DEBUG_BUF( 3, "server key exchange", ssl->in_msg + 4, ssl->in_hslen - 4 ); - - /* - * Ephemeral DH parameters: - * - * struct { - * opaque dh_p<1..2^16-1>; - * opaque dh_g<1..2^16-1>; - * opaque dh_Ys<1..2^16-1>; - * } ServerDHParams; - */ - p = ssl->in_msg + 4; - end = ssl->in_msg + ssl->in_hslen; - - if( ( ret = dhm_read_params( &ssl->dhm_ctx, &p, end ) ) != 0 ) - { - SSL_DEBUG_MSG( 2, ( "DHM Read Params returned -0x%x", -ret ) ); - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - if( ssl->minor_ver == SSL_MINOR_VERSION_3 ) - { - if( p[1] != SSL_SIG_RSA ) - { - SSL_DEBUG_MSG( 2, ( "Server used unsupported SignatureAlgorithm %d", p[1] ) ); - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - switch( p[0] ) - { -#if defined(POLARSSL_MD5_C) - case SSL_HASH_MD5: - hash_id = SIG_RSA_MD5; - break; -#endif -#if defined(POLARSSL_SHA1_C) - case SSL_HASH_SHA1: - hash_id = SIG_RSA_SHA1; - break; -#endif -#if defined(POLARSSL_SHA2_C) - case SSL_HASH_SHA224: - hash_id = SIG_RSA_SHA224; - break; - case SSL_HASH_SHA256: - hash_id = SIG_RSA_SHA256; - break; -#endif -#if defined(POLARSSL_SHA4_C) - case SSL_HASH_SHA384: - hash_id = SIG_RSA_SHA384; - break; - case SSL_HASH_SHA512: - hash_id = SIG_RSA_SHA512; - break; -#endif - default: - SSL_DEBUG_MSG( 2, ( "Server used unsupported HashAlgorithm %d", p[0] ) ); - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", p[1] ) ); - SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", p[0] ) ); - p += 2; - } - - n = ( p[0] << 8 ) | p[1]; - p += 2; - - if( end != p + n ) - { - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - if( (unsigned int)( end - p ) != ssl->peer_cert->rsa.len ) - { - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - if( ssl->dhm_ctx.len < 64 || ssl->dhm_ctx.len > 512 ) - { - SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE ); - } - - SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->dhm_ctx.P ); - SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->dhm_ctx.G ); - SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->dhm_ctx.GY ); - - if( ssl->minor_ver != SSL_MINOR_VERSION_3 ) - { - /* - * digitally-signed struct { - * opaque md5_hash[16]; - * opaque sha_hash[20]; - * }; - * - * md5_hash - * MD5(ClientHello.random + ServerHello.random - * + ServerParams); - * sha_hash - * SHA(ClientHello.random + ServerHello.random - * + ServerParams); - */ - n = ssl->in_hslen - ( end - p ) - 6; - - md5_starts( &md5 ); - md5_update( &md5, ssl->randbytes, 64 ); - md5_update( &md5, ssl->in_msg + 4, n ); - md5_finish( &md5, hash ); - - sha1_starts( &sha1 ); - sha1_update( &sha1, ssl->randbytes, 64 ); - sha1_update( &sha1, ssl->in_msg + 4, n ); - sha1_finish( &sha1, hash + 16 ); - - hash_id = SIG_RSA_RAW; - hashlen = 36; - } - else - { - sha2_context sha2; - sha4_context sha4; - - n = ssl->in_hslen - ( end - p ) - 8; - - /* - * digitally-signed struct { - * opaque client_random[32]; - * opaque server_random[32]; - * ServerDHParams params; - * }; - */ - switch( hash_id ) - { -#if defined(POLARSSL_MD5_C) - case SIG_RSA_MD5: - md5_starts( &md5 ); - md5_update( &md5, ssl->randbytes, 64 ); - md5_update( &md5, ssl->in_msg + 4, n ); - md5_finish( &md5, hash ); - hashlen = 16; - break; -#endif -#if defined(POLARSSL_SHA1_C) - case SIG_RSA_SHA1: - sha1_starts( &sha1 ); - sha1_update( &sha1, ssl->randbytes, 64 ); - sha1_update( &sha1, ssl->in_msg + 4, n ); - sha1_finish( &sha1, hash ); - hashlen = 20; - break; -#endif -#if defined(POLARSSL_SHA2_C) - case SIG_RSA_SHA224: - sha2_starts( &sha2, 1 ); - sha2_update( &sha2, ssl->randbytes, 64 ); - sha2_update( &sha2, ssl->in_msg + 4, n ); - sha2_finish( &sha2, hash ); - hashlen = 28; - break; - case SIG_RSA_SHA256: - sha2_starts( &sha2, 0 ); - sha2_update( &sha2, ssl->randbytes, 64 ); - sha2_update( &sha2, ssl->in_msg + 4, n ); - sha2_finish( &sha2, hash ); - hashlen = 32; - break; -#endif -#if defined(POLARSSL_SHA4_C) - case SIG_RSA_SHA384: - sha4_starts( &sha4, 1 ); - sha4_update( &sha4, ssl->randbytes, 64 ); - sha4_update( &sha4, ssl->in_msg + 4, n ); - sha4_finish( &sha4, hash ); - hashlen = 48; - break; - case SIG_RSA_SHA512: - sha4_starts( &sha4, 0 ); - sha4_update( &sha4, ssl->randbytes, 64 ); - sha4_update( &sha4, ssl->in_msg + 4, n ); - sha4_finish( &sha4, hash ); - hashlen = 64; - break; -#endif - } - } - - SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen ); - - if( ( ret = rsa_pkcs1_verify( &ssl->peer_cert->rsa, RSA_PUBLIC, - hash_id, hashlen, hash, p ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "rsa_pkcs1_verify", ret ); - return( ret ); - } - - ssl->state++; - - SSL_DEBUG_MSG( 2, ( "<= parse server key exchange" ) ); - - return( 0 ); -#endif -} - -static int ssl_parse_certificate_request( ssl_context *ssl ) -{ - int ret; - - SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) ); - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 5 SSL version - * 6 . 6 cert type count - * 7 .. n-1 cert types - * n .. n+1 length of all DNs - * n+2 .. n+3 length of DN 1 - * n+4 .. ... Distinguished Name #1 - * ... .. ... length of DN 2, etc. - */ - if( ( ret = ssl_read_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_read_record", ret ); - return( ret ); - } - - if( ssl->in_msgtype != SSL_MSG_HANDSHAKE ) - { - SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) ); - return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE ); - } - - ssl->client_auth = 0; - ssl->state++; - - if( ssl->in_msg[0] == SSL_HS_CERTIFICATE_REQUEST ) - ssl->client_auth++; - - SSL_DEBUG_MSG( 3, ( "got %s certificate request", - ssl->client_auth ? "a" : "no" ) ); - - SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) ); - - return( 0 ); -} - -static int ssl_parse_server_hello_done( ssl_context *ssl ) -{ - int ret; - - SSL_DEBUG_MSG( 2, ( "=> parse server hello done" ) ); - - if( ssl->client_auth != 0 ) - { - if( ( ret = ssl_read_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_read_record", ret ); - return( ret ); - } - - if( ssl->in_msgtype != SSL_MSG_HANDSHAKE ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) ); - return( POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE ); - } - } - - if( ssl->in_hslen != 4 || - ssl->in_msg[0] != SSL_HS_SERVER_HELLO_DONE ) - { - SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_SERVER_HELLO_DONE ); - } - - ssl->state++; - - SSL_DEBUG_MSG( 2, ( "<= parse server hello done" ) ); - - return( 0 ); -} - -static int ssl_write_client_key_exchange( ssl_context *ssl ) -{ - int ret; - size_t i, n; - - SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) ); - - if( ssl->session->ciphersuite == SSL_EDH_RSA_DES_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_DES_168_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_SHA256 || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_SHA256 || - ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA || - ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_128_SHA256 || - ssl->session->ciphersuite == SSL_EDH_RSA_CAMELLIA_256_SHA256 || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_128_GCM_SHA256 || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 ) - { -#if !defined(POLARSSL_DHM_C) - SSL_DEBUG_MSG( 1, ( "support for dhm in not available" ) ); - return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE ); -#else - /* - * DHM key exchange -- send G^X mod P - */ - n = ssl->dhm_ctx.len; - - ssl->out_msg[4] = (unsigned char)( n >> 8 ); - ssl->out_msg[5] = (unsigned char)( n ); - i = 6; - - ret = dhm_make_public( &ssl->dhm_ctx, 256, - &ssl->out_msg[i], n, - ssl->f_rng, ssl->p_rng ); - if( ret != 0 ) - { - SSL_DEBUG_RET( 1, "dhm_make_public", ret ); - return( ret ); - } - - SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->dhm_ctx.X ); - SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->dhm_ctx.GX ); - - ssl->pmslen = ssl->dhm_ctx.len; - - if( ( ret = dhm_calc_secret( &ssl->dhm_ctx, - ssl->premaster, - &ssl->pmslen ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "dhm_calc_secret", ret ); - return( ret ); - } - - SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->dhm_ctx.K ); -#endif - } - else - { - /* - * RSA key exchange -- send rsa_public(pkcs1 v1.5(premaster)) - */ - ssl->premaster[0] = (unsigned char) ssl->max_major_ver; - ssl->premaster[1] = (unsigned char) ssl->max_minor_ver; - ssl->pmslen = 48; - - ret = ssl->f_rng( ssl->p_rng, ssl->premaster + 2, ssl->pmslen - 2 ); - if( ret != 0 ) - return( ret ); - - i = 4; - n = ssl->peer_cert->rsa.len; - - if( ssl->minor_ver != SSL_MINOR_VERSION_0 ) - { - i += 2; - ssl->out_msg[4] = (unsigned char)( n >> 8 ); - ssl->out_msg[5] = (unsigned char)( n ); - } - - ret = rsa_pkcs1_encrypt( &ssl->peer_cert->rsa, - ssl->f_rng, ssl->p_rng, - RSA_PUBLIC, - ssl->pmslen, ssl->premaster, - ssl->out_msg + i ); - if( ret != 0 ) - { - SSL_DEBUG_RET( 1, "rsa_pkcs1_encrypt", ret ); - return( ret ); - } - } - - if( ( ret = ssl_derive_keys( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_derive_keys", ret ); - return( ret ); - } - - ssl->out_msglen = i + n; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_CLIENT_KEY_EXCHANGE; - - ssl->state++; - - if( ( ret = ssl_write_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_write_record", ret ); - return( ret ); - } - - SSL_DEBUG_MSG( 2, ( "<= write client key exchange" ) ); - - return( 0 ); -} - -static int ssl_write_certificate_verify( ssl_context *ssl ) -{ - int ret = 0; - size_t n = 0, offset = 0; - unsigned char hash[48]; - int hash_id = SIG_RSA_RAW; - unsigned int hashlen = 36; - - SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) ); - - if( ssl->client_auth == 0 || ssl->own_cert == NULL ) - { - SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) ); - ssl->state++; - return( 0 ); - } - - if( ssl->minor_ver == SSL_MINOR_VERSION_3 ) - { - // TODO TLS1.2 Should be based on allowed signature algorithm received in - // Certificate Request according to RFC 5246. But OpenSSL only allows - // SHA256 and SHA384. Find out why OpenSSL does this. - // - if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 ) - { - hash_id = SIG_RSA_SHA384; - hashlen = 48; - } - else - { - hash_id = SIG_RSA_SHA256; - hashlen = 32; - } - } - - if( ssl->rsa_key == NULL ) - { -#if defined(POLARSSL_PKCS11_C) - if( ssl->pkcs11_key == NULL ) - { -#endif /* defined(POLARSSL_PKCS11_C) */ - SSL_DEBUG_MSG( 1, ( "got no private key" ) ); - return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED ); -#if defined(POLARSSL_PKCS11_C) - } -#endif /* defined(POLARSSL_PKCS11_C) */ - } - - /* - * Make an RSA signature of the handshake digests - */ - ssl->calc_verify( ssl, hash ); - - if ( ssl->rsa_key ) - n = ssl->rsa_key->len; -#if defined(POLARSSL_PKCS11_C) - else - n = ssl->pkcs11_key->len; -#endif /* defined(POLARSSL_PKCS11_C) */ - - if( ssl->minor_ver == SSL_MINOR_VERSION_3 ) - { - // TODO TLS1.2 Should be based on allowed signature algorithm received in - // Certificate Request according to RFC 5246. But OpenSSL only allows - // SHA256 and SHA384. Find out why OpenSSL does this. - // - if( ssl->session->ciphersuite == SSL_RSA_AES_256_GCM_SHA384 || - ssl->session->ciphersuite == SSL_EDH_RSA_AES_256_GCM_SHA384 ) - { - ssl->out_msg[4] = SSL_HASH_SHA384; - ssl->out_msg[5] = SSL_SIG_RSA; - } - else - { - ssl->out_msg[4] = SSL_HASH_SHA256; - ssl->out_msg[5] = SSL_SIG_RSA; - } - - offset = 2; - } - - ssl->out_msg[4 + offset] = (unsigned char)( n >> 8 ); - ssl->out_msg[5 + offset] = (unsigned char)( n ); - - if( ssl->rsa_key ) - { - ret = rsa_pkcs1_sign( ssl->rsa_key, ssl->f_rng, ssl->p_rng, - RSA_PRIVATE, hash_id, - hashlen, hash, ssl->out_msg + 6 + offset ); - } else { -#if defined(POLARSSL_PKCS11_C) - ret = pkcs11_sign( ssl->pkcs11_key, RSA_PRIVATE, hash_id, - hashlen, hash, ssl->out_msg + 6 + offset ); -#endif /* defined(POLARSSL_PKCS11_C) */ - } - - if (ret != 0) - { - SSL_DEBUG_RET( 1, "pkcs1_sign", ret ); - return( ret ); - } - - ssl->out_msglen = 6 + n + offset; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_CERTIFICATE_VERIFY; - - ssl->state++; - - if( ( ret = ssl_write_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_write_record", ret ); - return( ret ); - } - - SSL_DEBUG_MSG( 2, ( "<= write certificate verify" ) ); - - return( 0 ); -} - -/* - * SSL handshake -- client side - */ -int ssl_handshake_client( ssl_context *ssl ) -{ - int ret = 0; - - SSL_DEBUG_MSG( 2, ( "=> handshake client" ) ); - - while( ssl->state != SSL_HANDSHAKE_OVER ) - { - SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) ); - - if( ( ret = ssl_flush_output( ssl ) ) != 0 ) - break; - - switch( ssl->state ) - { - case SSL_HELLO_REQUEST: - ssl->state = SSL_CLIENT_HELLO; - break; - - /* - * ==> ClientHello - */ - case SSL_CLIENT_HELLO: - ret = ssl_write_client_hello( ssl ); - break; - - /* - * <== ServerHello - * Certificate - * ( ServerKeyExchange ) - * ( CertificateRequest ) - * ServerHelloDone - */ - case SSL_SERVER_HELLO: - ret = ssl_parse_server_hello( ssl ); - break; - - case SSL_SERVER_CERTIFICATE: - ret = ssl_parse_certificate( ssl ); - break; - - case SSL_SERVER_KEY_EXCHANGE: - ret = ssl_parse_server_key_exchange( ssl ); - break; - - case SSL_CERTIFICATE_REQUEST: - ret = ssl_parse_certificate_request( ssl ); - break; - - case SSL_SERVER_HELLO_DONE: - ret = ssl_parse_server_hello_done( ssl ); - break; - - /* - * ==> ( Certificate/Alert ) - * ClientKeyExchange - * ( CertificateVerify ) - * ChangeCipherSpec - * Finished - */ - case SSL_CLIENT_CERTIFICATE: - ret = ssl_write_certificate( ssl ); - break; - - case SSL_CLIENT_KEY_EXCHANGE: - ret = ssl_write_client_key_exchange( ssl ); - break; - - case SSL_CERTIFICATE_VERIFY: - ret = ssl_write_certificate_verify( ssl ); - break; - - case SSL_CLIENT_CHANGE_CIPHER_SPEC: - ret = ssl_write_change_cipher_spec( ssl ); - break; - - case SSL_CLIENT_FINISHED: - ret = ssl_write_finished( ssl ); - break; - - /* - * <== ChangeCipherSpec - * Finished - */ - case SSL_SERVER_CHANGE_CIPHER_SPEC: - ret = ssl_parse_change_cipher_spec( ssl ); - break; - - case SSL_SERVER_FINISHED: - ret = ssl_parse_finished( ssl ); - break; - - case SSL_FLUSH_BUFFERS: - SSL_DEBUG_MSG( 2, ( "handshake: done" ) ); - ssl->state = SSL_HANDSHAKE_OVER; - break; - - default: - SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) ); - return( POLARSSL_ERR_SSL_BAD_INPUT_DATA ); - } - - if( ret != 0 ) - break; - } - - SSL_DEBUG_MSG( 2, ( "<= handshake client" ) ); - - return( ret ); -} - -#endif |