From 682f23e7bb4a52bedf46eff5c4859e1308eda124 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Tue, 25 Aug 2015 19:56:24 +0200 Subject: Update build ref --- polarssl/src/library/ssl_srv.c | 1080 ---------------------------------------- 1 file changed, 1080 deletions(-) delete mode 100644 polarssl/src/library/ssl_srv.c (limited to 'polarssl/src/library/ssl_srv.c') diff --git a/polarssl/src/library/ssl_srv.c b/polarssl/src/library/ssl_srv.c deleted file mode 100644 index ecf1536..0000000 --- a/polarssl/src/library/ssl_srv.c +++ /dev/null @@ -1,1080 +0,0 @@ -/* - * SSLv3/TLSv1 server-side functions - * - * Copyright (C) 2006-2012, Brainspark B.V. - * - * This file is part of PolarSSL (http://www.polarssl.org) - * Lead Maintainer: Paul Bakker - * - * 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_SRV_C) - -#include "polarssl/debug.h" -#include "polarssl/ssl.h" - -#if defined(POLARSSL_PKCS11_C) -#include "polarssl/pkcs11.h" -#endif /* defined(POLARSSL_PKCS11_C) */ - -#include -#include -#include - -static int ssl_parse_client_hello( ssl_context *ssl ) -{ - int ret; - unsigned int i, j; - size_t n; - unsigned int ciph_len, sess_len; - unsigned int chal_len, comp_len; - unsigned char *buf, *p; - - SSL_DEBUG_MSG( 2, ( "=> parse client hello" ) ); - - if( ( ret = ssl_fetch_input( ssl, 5 ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_fetch_input", ret ); - return( ret ); - } - - buf = ssl->in_hdr; - - if( ( buf[0] & 0x80 ) != 0 ) - { - SSL_DEBUG_BUF( 4, "record header", buf, 5 ); - - SSL_DEBUG_MSG( 3, ( "client hello v2, message type: %d", - buf[2] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v2, message len.: %d", - ( ( buf[0] & 0x7F ) << 8 ) | buf[1] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v2, max. version: [%d:%d]", - buf[3], buf[4] ) ); - - /* - * SSLv2 Client Hello - * - * Record layer: - * 0 . 1 message length - * - * SSL layer: - * 2 . 2 message type - * 3 . 4 protocol version - */ - if( buf[2] != SSL_HS_CLIENT_HELLO || - buf[3] != SSL_MAJOR_VERSION_3 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - n = ( ( buf[0] << 8 ) | buf[1] ) & 0x7FFF; - - if( n < 17 || n > 512 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - ssl->max_major_ver = buf[3]; - ssl->max_minor_ver = buf[4]; - - ssl->major_ver = SSL_MAJOR_VERSION_3; - ssl->minor_ver = ( buf[4] <= SSL_MINOR_VERSION_3 ) - ? buf[4] : SSL_MINOR_VERSION_3; - - if( ( ret = ssl_fetch_input( ssl, 2 + n ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_fetch_input", ret ); - return( ret ); - } - - ssl->update_checksum( ssl, buf + 2, n ); - - buf = ssl->in_msg; - n = ssl->in_left - 5; - - /* - * 0 . 1 ciphersuitelist length - * 2 . 3 session id length - * 4 . 5 challenge length - * 6 . .. ciphersuitelist - * .. . .. session id - * .. . .. challenge - */ - SSL_DEBUG_BUF( 4, "record contents", buf, n ); - - ciph_len = ( buf[0] << 8 ) | buf[1]; - sess_len = ( buf[2] << 8 ) | buf[3]; - chal_len = ( buf[4] << 8 ) | buf[5]; - - SSL_DEBUG_MSG( 3, ( "ciph_len: %d, sess_len: %d, chal_len: %d", - ciph_len, sess_len, chal_len ) ); - - /* - * Make sure each parameter length is valid - */ - if( ciph_len < 3 || ( ciph_len % 3 ) != 0 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - if( sess_len > 32 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - if( chal_len < 8 || chal_len > 32 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - if( n != 6 + ciph_len + sess_len + chal_len ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist", - buf + 6, ciph_len ); - SSL_DEBUG_BUF( 3, "client hello, session id", - buf + 6 + ciph_len, sess_len ); - SSL_DEBUG_BUF( 3, "client hello, challenge", - buf + 6 + ciph_len + sess_len, chal_len ); - - p = buf + 6 + ciph_len; - ssl->session->length = sess_len; - memset( ssl->session->id, 0, sizeof( ssl->session->id ) ); - memcpy( ssl->session->id, p, ssl->session->length ); - - p += sess_len; - memset( ssl->randbytes, 0, 64 ); - memcpy( ssl->randbytes + 32 - chal_len, p, chal_len ); - - for( i = 0; ssl->ciphersuites[i] != 0; i++ ) - { - for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 ) - { - if( p[0] == 0 && - p[1] == 0 && - p[2] == ssl->ciphersuites[i] ) - goto have_ciphersuite; - } - } - } - else - { - SSL_DEBUG_BUF( 4, "record header", buf, 5 ); - - SSL_DEBUG_MSG( 3, ( "client hello v3, message type: %d", - buf[0] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v3, message len.: %d", - ( buf[3] << 8 ) | buf[4] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v3, protocol ver: [%d:%d]", - buf[1], buf[2] ) ); - - /* - * SSLv3 Client Hello - * - * Record layer: - * 0 . 0 message type - * 1 . 2 protocol version - * 3 . 4 message length - */ - if( buf[0] != SSL_MSG_HANDSHAKE || - buf[1] != SSL_MAJOR_VERSION_3 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - n = ( buf[3] << 8 ) | buf[4]; - - if( n < 45 || n > 512 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - if( ( ret = ssl_fetch_input( ssl, 5 + n ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_fetch_input", ret ); - return( ret ); - } - - buf = ssl->in_msg; - n = ssl->in_left - 5; - - ssl->update_checksum( ssl, buf, n ); - - /* - * SSL layer: - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 5 protocol version - * 6 . 9 UNIX time() - * 10 . 37 random bytes - * 38 . 38 session id length - * 39 . 38+x session id - * 39+x . 40+x ciphersuitelist length - * 41+x . .. ciphersuitelist - * .. . .. compression alg. - * .. . .. extensions - */ - SSL_DEBUG_BUF( 4, "record contents", buf, n ); - - SSL_DEBUG_MSG( 3, ( "client hello v3, handshake type: %d", - buf[0] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v3, handshake len.: %d", - ( buf[1] << 16 ) | ( buf[2] << 8 ) | buf[3] ) ); - SSL_DEBUG_MSG( 3, ( "client hello v3, max. version: [%d:%d]", - buf[4], buf[5] ) ); - - /* - * Check the handshake type and protocol version - */ - if( buf[0] != SSL_HS_CLIENT_HELLO || - buf[4] != SSL_MAJOR_VERSION_3 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - ssl->major_ver = SSL_MAJOR_VERSION_3; - ssl->minor_ver = ( buf[5] <= SSL_MINOR_VERSION_3 ) - ? buf[5] : SSL_MINOR_VERSION_3; - - ssl->max_major_ver = buf[4]; - ssl->max_minor_ver = buf[5]; - - memcpy( ssl->randbytes, buf + 6, 32 ); - - /* - * Check the handshake message length - */ - if( buf[1] != 0 || n != (unsigned int) 4 + ( ( buf[2] << 8 ) | buf[3] ) ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - /* - * Check the session length - */ - sess_len = buf[38]; - - if( sess_len > 32 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - ssl->session->length = sess_len; - memset( ssl->session->id, 0, sizeof( ssl->session->id ) ); - memcpy( ssl->session->id, buf + 39 , ssl->session->length ); - - /* - * Check the ciphersuitelist length - */ - ciph_len = ( buf[39 + sess_len] << 8 ) - | ( buf[40 + sess_len] ); - - if( ciph_len < 2 || ciph_len > 256 || ( ciph_len % 2 ) != 0 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - /* - * Check the compression algorithms length - */ - comp_len = buf[41 + sess_len + ciph_len]; - - if( comp_len < 1 || comp_len > 16 ) - { - SSL_DEBUG_MSG( 1, ( "bad client hello message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_HELLO ); - } - - SSL_DEBUG_BUF( 3, "client hello, random bytes", - buf + 6, 32 ); - SSL_DEBUG_BUF( 3, "client hello, session id", - buf + 38, sess_len ); - SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist", - buf + 41 + sess_len, ciph_len ); - SSL_DEBUG_BUF( 3, "client hello, compression", - buf + 42 + sess_len + ciph_len, comp_len ); - - /* - * Search for a matching ciphersuite - */ - for( i = 0; ssl->ciphersuites[i] != 0; i++ ) - { - for( j = 0, p = buf + 41 + sess_len; j < ciph_len; - j += 2, p += 2 ) - { - if( p[0] == 0 && p[1] == ssl->ciphersuites[i] ) - goto have_ciphersuite; - } - } - } - - SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) ); - - return( POLARSSL_ERR_SSL_NO_CIPHER_CHOSEN ); - -have_ciphersuite: - - ssl->session->ciphersuite = ssl->ciphersuites[i]; - ssl_kickstart_checksum( ssl, ssl->session->ciphersuite, buf, n ); - - ssl->in_left = 0; - ssl->state++; - - SSL_DEBUG_MSG( 2, ( "<= parse client hello" ) ); - - return( 0 ); -} - -static int ssl_write_server_hello( ssl_context *ssl ) -{ - time_t t; - int ret, n; - unsigned char *buf, *p; - - SSL_DEBUG_MSG( 2, ( "=> write server hello" ) ); - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 5 protocol version - * 6 . 9 UNIX time() - * 10 . 37 random bytes - */ - buf = ssl->out_msg; - p = buf + 4; - - *p++ = (unsigned char) ssl->major_ver; - *p++ = (unsigned char) ssl->minor_ver; - - SSL_DEBUG_MSG( 3, ( "server hello, chosen 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, ( "server hello, current time: %lu", t ) ); - - if( ( ret = ssl->f_rng( ssl->p_rng, p, 28 ) ) != 0 ) - return( ret ); - - p += 28; - - memcpy( ssl->randbytes + 32, buf + 6, 32 ); - - 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. - */ - ssl->session->length = n = 32; - *p++ = (unsigned char) ssl->session->length; - - if( ssl->s_get == NULL || - ssl->s_get( ssl ) != 0 ) - { - /* - * Not found, create a new session id - */ - ssl->resume = 0; - ssl->state++; - - if( ssl->session == NULL ) - { - SSL_DEBUG_MSG( 1, ( "No session struct set" ) ); - return( POLARSSL_ERR_SSL_BAD_INPUT_DATA ); - } - - if( ( ret = ssl->f_rng( ssl->p_rng, ssl->session->id, n ) ) != 0 ) - return( ret ); - } - else - { - /* - * Found a matching session, resume it - */ - ssl->resume = 1; - ssl->state = SSL_SERVER_CHANGE_CIPHER_SPEC; - - if( ( ret = ssl_derive_keys( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_derive_keys", ret ); - return( ret ); - } - } - - memcpy( p, ssl->session->id, ssl->session->length ); - p += ssl->session->length; - - SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) ); - SSL_DEBUG_BUF( 3, "server hello, session id", buf + 39, n ); - SSL_DEBUG_MSG( 3, ( "%s session has been resumed", - ssl->resume ? "a" : "no" ) ); - - *p++ = (unsigned char)( ssl->session->ciphersuite >> 8 ); - *p++ = (unsigned char)( ssl->session->ciphersuite ); - *p++ = SSL_COMPRESS_NULL; - - SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %d", - ssl->session->ciphersuite ) ); - SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", 0 ) ); - - ssl->out_msglen = p - buf; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_SERVER_HELLO; - - ret = ssl_write_record( ssl ); - - SSL_DEBUG_MSG( 2, ( "<= write server hello" ) ); - - return( ret ); -} - -static int ssl_write_certificate_request( ssl_context *ssl ) -{ - int ret; - size_t n; - unsigned char *buf, *p; - const x509_cert *crt; - - SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) ); - - ssl->state++; - - if( ssl->authmode == SSL_VERIFY_NONE ) - { - SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) ); - return( 0 ); - } - - /* - * 0 . 0 handshake type - * 1 . 3 handshake length - * 4 . 4 cert type count - * 5 .. 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. - */ - buf = ssl->out_msg; - p = buf + 4; - - /* - * At the moment, only RSA certificates are supported - */ - *p++ = 1; - *p++ = 1; - - p += 2; - crt = ssl->ca_chain; - - while( crt != NULL ) - { - if( p - buf > 4096 ) - break; - - n = crt->subject_raw.len; - *p++ = (unsigned char)( n >> 8 ); - *p++ = (unsigned char)( n ); - memcpy( p, crt->subject_raw.p, n ); - - SSL_DEBUG_BUF( 3, "requested DN", p, n ); - p += n; crt = crt->next; - } - - ssl->out_msglen = n = p - buf; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_CERTIFICATE_REQUEST; - ssl->out_msg[6] = (unsigned char)( ( n - 8 ) >> 8 ); - ssl->out_msg[7] = (unsigned char)( ( n - 8 ) ); - - ret = ssl_write_record( ssl ); - - SSL_DEBUG_MSG( 2, ( "<= write certificate request" ) ); - - return( ret ); -} - -static int ssl_write_server_key_exchange( ssl_context *ssl ) -{ -#if defined(POLARSSL_DHM_C) - int ret; - size_t n, rsa_key_len = 0; - unsigned char hash[48]; - md5_context md5; - sha1_context sha1; - int hash_id; - unsigned int hashlen; -#endif - - SSL_DEBUG_MSG( 2, ( "=> write 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 write server key exchange" ) ); - ssl->state++; - return( 0 ); - } - -#if !defined(POLARSSL_DHM_C) - SSL_DEBUG_MSG( 1, ( "support for dhm is not available" ) ); - return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE ); -#else - - 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) */ - } - - /* - * 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; - */ - if( ( ret = dhm_make_params( &ssl->dhm_ctx, 256, ssl->out_msg + 4, - &n, ssl->f_rng, ssl->p_rng ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "dhm_make_params", ret ); - return( ret ); - } - - SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->dhm_ctx.X ); - 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: GX", &ssl->dhm_ctx.GX ); - - 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); - */ - md5_starts( &md5 ); - md5_update( &md5, ssl->randbytes, 64 ); - md5_update( &md5, ssl->out_msg + 4, n ); - md5_finish( &md5, hash ); - - sha1_starts( &sha1 ); - sha1_update( &sha1, ssl->randbytes, 64 ); - sha1_update( &sha1, ssl->out_msg + 4, n ); - sha1_finish( &sha1, hash + 16 ); - - hashlen = 36; - hash_id = SIG_RSA_RAW; - } - else - { - /* - * digitally-signed struct { - * opaque client_random[32]; - * opaque server_random[32]; - * ServerDHParams params; - * }; - */ - /* TODO TLS1.2 Get a supported hash algorithm from the - * signature_algorithms extension, Otherwise SHA1 + RSA! - */ - - sha1_starts( &sha1 ); - sha1_update( &sha1, ssl->randbytes, 64 ); - sha1_update( &sha1, ssl->out_msg + 4, n ); - sha1_finish( &sha1, hash ); - - hashlen = 20; - hash_id = SIG_RSA_SHA1; - } - - SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen ); - - if ( ssl->rsa_key ) - rsa_key_len = ssl->rsa_key->len; -#if defined(POLARSSL_PKCS11_C) - else - rsa_key_len = ssl->pkcs11_key->len; -#endif /* defined(POLARSSL_PKCS11_C) */ - - if( ssl->minor_ver == SSL_MINOR_VERSION_3 ) - { - // TODO TLS1.2 Base on selection above (SHA1 + RSA is default choice) - ssl->out_msg[4 + n] = SSL_HASH_SHA1; - ssl->out_msg[5 + n] = SSL_SIG_RSA; - - n += 2; - } - - ssl->out_msg[4 + n] = (unsigned char)( rsa_key_len >> 8 ); - ssl->out_msg[5 + n] = (unsigned char)( rsa_key_len ); - - 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 + n ); - } -#if defined(POLARSSL_PKCS11_C) - else { - ret = pkcs11_sign( ssl->pkcs11_key, RSA_PRIVATE, - hash_id, hashlen, hash, ssl->out_msg + 6 + n ); - } -#endif /* defined(POLARSSL_PKCS11_C) */ - - if( ret != 0 ) - { - SSL_DEBUG_RET( 1, "pkcs1_sign", ret ); - return( ret ); - } - - SSL_DEBUG_BUF( 3, "my RSA sig", ssl->out_msg + 6 + n, rsa_key_len ); - - ssl->out_msglen = 6 + n + rsa_key_len; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_SERVER_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 server key exchange" ) ); - - return( 0 ); -#endif -} - -static int ssl_write_server_hello_done( ssl_context *ssl ) -{ - int ret; - - SSL_DEBUG_MSG( 2, ( "=> write server hello done" ) ); - - ssl->out_msglen = 4; - ssl->out_msgtype = SSL_MSG_HANDSHAKE; - ssl->out_msg[0] = SSL_HS_SERVER_HELLO_DONE; - - ssl->state++; - - if( ( ret = ssl_write_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_write_record", ret ); - return( ret ); - } - - SSL_DEBUG_MSG( 2, ( "<= write server hello done" ) ); - - return( 0 ); -} - -static int ssl_parse_client_key_exchange( ssl_context *ssl ) -{ - int ret; - size_t i, n = 0; - - SSL_DEBUG_MSG( 2, ( "=> parse client key exchange" ) ); - - 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 client key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE ); - } - - if( ssl->in_msg[0] != SSL_HS_CLIENT_KEY_EXCHANGE ) - { - SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_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 is not available" ) ); - return( POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE ); -#else - /* - * Receive G^Y mod P, premaster = (G^Y)^X mod P - */ - n = ( ssl->in_msg[4] << 8 ) | ssl->in_msg[5]; - - if( n < 1 || n > ssl->dhm_ctx.len || - n + 6 != ssl->in_hslen ) - { - SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE ); - } - - if( ( ret = dhm_read_public( &ssl->dhm_ctx, - ssl->in_msg + 6, n ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "dhm_read_public", ret ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_DHM_RP ); - } - - SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->dhm_ctx.GY ); - - 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( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_DHM_CS ); - } - - SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->dhm_ctx.K ); -#endif - } - else - { - if( ssl->rsa_key == NULL ) - { -#if defined(POLARSSL_PKCS11_C) - if( ssl->pkcs11_key == NULL ) - { -#endif - SSL_DEBUG_MSG( 1, ( "got no private key" ) ); - return( POLARSSL_ERR_SSL_PRIVATE_KEY_REQUIRED ); -#if defined(POLARSSL_PKCS11_C) - } -#endif - } - - /* - * Decrypt the premaster using own private RSA key - */ - i = 4; - if( ssl->rsa_key ) - n = ssl->rsa_key->len; -#if defined(POLARSSL_PKCS11_C) - else - n = ssl->pkcs11_key->len; -#endif - ssl->pmslen = 48; - - if( ssl->minor_ver != SSL_MINOR_VERSION_0 ) - { - i += 2; - if( ssl->in_msg[4] != ( ( n >> 8 ) & 0xFF ) || - ssl->in_msg[5] != ( ( n ) & 0xFF ) ) - { - SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE ); - } - } - - if( ssl->in_hslen != i + n ) - { - SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE ); - } - - if( ssl->rsa_key ) { - ret = rsa_pkcs1_decrypt( ssl->rsa_key, RSA_PRIVATE, &ssl->pmslen, - ssl->in_msg + i, ssl->premaster, - sizeof(ssl->premaster) ); - } -#if defined(POLARSSL_PKCS11_C) - else { - ret = pkcs11_decrypt( ssl->pkcs11_key, RSA_PRIVATE, &ssl->pmslen, - ssl->in_msg + i, ssl->premaster, - sizeof(ssl->premaster) ); - } -#endif /* defined(POLARSSL_PKCS11_C) */ - - if( ret != 0 || ssl->pmslen != 48 || - ssl->premaster[0] != ssl->max_major_ver || - ssl->premaster[1] != ssl->max_minor_ver ) - { - SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) ); - - /* - * Protection against Bleichenbacher's attack: - * invalid PKCS#1 v1.5 padding must not cause - * the connection to end immediately; instead, - * send a bad_record_mac later in the handshake. - */ - ssl->pmslen = 48; - - ret = ssl->f_rng( ssl->p_rng, ssl->premaster, ssl->pmslen ); - if( ret != 0 ) - return( ret ); - } - } - - if( ( ret = ssl_derive_keys( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_derive_keys", ret ); - return( ret ); - } - - if( ssl->s_set != NULL ) - ssl->s_set( ssl ); - - ssl->state++; - - SSL_DEBUG_MSG( 2, ( "<= parse client key exchange" ) ); - - return( 0 ); -} - -static int ssl_parse_certificate_verify( ssl_context *ssl ) -{ - int ret; - size_t n1, n2; - unsigned char hash[48]; - - SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) ); - - if( ssl->peer_cert == NULL ) - { - SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) ); - ssl->state++; - return( 0 ); - } - - ssl->calc_verify( ssl, hash ); - - if( ( ret = ssl_read_record( ssl ) ) != 0 ) - { - SSL_DEBUG_RET( 1, "ssl_read_record", ret ); - return( ret ); - } - - ssl->state++; - - if( ssl->in_msgtype != SSL_MSG_HANDSHAKE ) - { - SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY ); - } - - if( ssl->in_msg[0] != SSL_HS_CERTIFICATE_VERIFY ) - { - SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY ); - } - - n1 = ssl->peer_cert->rsa.len; - n2 = ( ssl->in_msg[4] << 8 ) | ssl->in_msg[5]; - - if( n1 + 6 != ssl->in_hslen || n1 != n2 ) - { - SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) ); - return( POLARSSL_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY ); - } - - ret = rsa_pkcs1_verify( &ssl->peer_cert->rsa, RSA_PUBLIC, - SIG_RSA_RAW, 36, hash, ssl->in_msg + 6 ); - if( ret != 0 ) - { - SSL_DEBUG_RET( 1, "rsa_pkcs1_verify", ret ); - return( ret ); - } - - SSL_DEBUG_MSG( 2, ( "<= parse certificate verify" ) ); - - return( 0 ); -} - -/* - * SSL handshake -- server side - */ -int ssl_handshake_server( ssl_context *ssl ) -{ - int ret = 0; - - SSL_DEBUG_MSG( 2, ( "=> handshake server" ) ); - - while( ssl->state != SSL_HANDSHAKE_OVER ) - { - SSL_DEBUG_MSG( 2, ( "server 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_parse_client_hello( ssl ); - break; - - /* - * ==> ServerHello - * Certificate - * ( ServerKeyExchange ) - * ( CertificateRequest ) - * ServerHelloDone - */ - case SSL_SERVER_HELLO: - ret = ssl_write_server_hello( ssl ); - break; - - case SSL_SERVER_CERTIFICATE: - ret = ssl_write_certificate( ssl ); - break; - - case SSL_SERVER_KEY_EXCHANGE: - ret = ssl_write_server_key_exchange( ssl ); - break; - - case SSL_CERTIFICATE_REQUEST: - ret = ssl_write_certificate_request( ssl ); - break; - - case SSL_SERVER_HELLO_DONE: - ret = ssl_write_server_hello_done( ssl ); - break; - - /* - * <== ( Certificate/Alert ) - * ClientKeyExchange - * ( CertificateVerify ) - * ChangeCipherSpec - * Finished - */ - case SSL_CLIENT_CERTIFICATE: - ret = ssl_parse_certificate( ssl ); - break; - - case SSL_CLIENT_KEY_EXCHANGE: - ret = ssl_parse_client_key_exchange( ssl ); - break; - - case SSL_CERTIFICATE_VERIFY: - ret = ssl_parse_certificate_verify( ssl ); - break; - - case SSL_CLIENT_CHANGE_CIPHER_SPEC: - ret = ssl_parse_change_cipher_spec( ssl ); - break; - - case SSL_CLIENT_FINISHED: - ret = ssl_parse_finished( ssl ); - break; - - /* - * ==> ChangeCipherSpec - * Finished - */ - case SSL_SERVER_CHANGE_CIPHER_SPEC: - ret = ssl_write_change_cipher_spec( ssl ); - break; - - case SSL_SERVER_FINISHED: - ret = ssl_write_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 server" ) ); - - return( ret ); -} - -#endif -- cgit v1.2.3