1095 lines
36 KiB
C
1095 lines
36 KiB
C
/* ssl/s2_clnt.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include "ssl_locl.h"
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#ifndef OPENSSL_NO_SSL2
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# include <stdio.h>
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# include <openssl/rand.h>
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# include <openssl/buffer.h>
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# include <openssl/objects.h>
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# include <openssl/evp.h>
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static const SSL_METHOD *ssl2_get_client_method(int ver);
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static int get_server_finished(SSL *s);
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static int get_server_verify(SSL *s);
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static int get_server_hello(SSL *s);
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static int client_hello(SSL *s);
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static int client_master_key(SSL *s);
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static int client_finished(SSL *s);
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static int client_certificate(SSL *s);
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static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
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unsigned char *to, int padding);
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# define BREAK break
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static const SSL_METHOD *ssl2_get_client_method(int ver)
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{
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if (ver == SSL2_VERSION)
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return (SSLv2_client_method());
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else
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return (NULL);
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}
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IMPLEMENT_ssl2_meth_func(SSLv2_client_method,
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ssl_undefined_function,
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ssl2_connect, ssl2_get_client_method)
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int ssl2_connect(SSL *s)
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{
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unsigned long l = (unsigned long)time(NULL);
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BUF_MEM *buf = NULL;
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int ret = -1;
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void (*cb) (const SSL *ssl, int type, int val) = NULL;
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int new_state, state;
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RAND_add(&l, sizeof(l), 0);
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ERR_clear_error();
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clear_sys_error();
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if (s->info_callback != NULL)
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cb = s->info_callback;
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else if (s->ctx->info_callback != NULL)
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cb = s->ctx->info_callback;
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/* init things to blank */
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s->in_handshake++;
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if (!SSL_in_init(s) || SSL_in_before(s))
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SSL_clear(s);
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for (;;) {
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state = s->state;
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switch (s->state) {
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case SSL_ST_BEFORE:
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case SSL_ST_CONNECT:
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case SSL_ST_BEFORE | SSL_ST_CONNECT:
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case SSL_ST_OK | SSL_ST_CONNECT:
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s->server = 0;
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if (cb != NULL)
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cb(s, SSL_CB_HANDSHAKE_START, 1);
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s->version = SSL2_VERSION;
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s->type = SSL_ST_CONNECT;
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buf = s->init_buf;
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if ((buf == NULL) && ((buf = BUF_MEM_new()) == NULL)) {
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ret = -1;
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goto end;
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}
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if (!BUF_MEM_grow(buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) {
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if (buf == s->init_buf)
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buf = NULL;
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ret = -1;
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goto end;
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}
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s->init_buf = buf;
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buf = NULL;
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s->init_num = 0;
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s->state = SSL2_ST_SEND_CLIENT_HELLO_A;
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s->ctx->stats.sess_connect++;
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s->handshake_func = ssl2_connect;
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BREAK;
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case SSL2_ST_SEND_CLIENT_HELLO_A:
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case SSL2_ST_SEND_CLIENT_HELLO_B:
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s->shutdown = 0;
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ret = client_hello(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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s->state = SSL2_ST_GET_SERVER_HELLO_A;
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BREAK;
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case SSL2_ST_GET_SERVER_HELLO_A:
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case SSL2_ST_GET_SERVER_HELLO_B:
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ret = get_server_hello(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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if (!s->hit) { /* new session */
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s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
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BREAK;
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} else {
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s->state = SSL2_ST_CLIENT_START_ENCRYPTION;
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break;
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}
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case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
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case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
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ret = client_master_key(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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s->state = SSL2_ST_CLIENT_START_ENCRYPTION;
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break;
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case SSL2_ST_CLIENT_START_ENCRYPTION:
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/*
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* Ok, we now have all the stuff needed to start encrypting, so
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* lets fire it up :-)
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*/
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if (!ssl2_enc_init(s, 1)) {
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ret = -1;
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goto end;
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}
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s->s2->clear_text = 0;
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s->state = SSL2_ST_SEND_CLIENT_FINISHED_A;
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break;
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case SSL2_ST_SEND_CLIENT_FINISHED_A:
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case SSL2_ST_SEND_CLIENT_FINISHED_B:
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ret = client_finished(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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s->state = SSL2_ST_GET_SERVER_VERIFY_A;
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break;
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case SSL2_ST_GET_SERVER_VERIFY_A:
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case SSL2_ST_GET_SERVER_VERIFY_B:
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ret = get_server_verify(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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s->state = SSL2_ST_GET_SERVER_FINISHED_A;
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break;
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case SSL2_ST_GET_SERVER_FINISHED_A:
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case SSL2_ST_GET_SERVER_FINISHED_B:
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ret = get_server_finished(s);
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if (ret <= 0)
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goto end;
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break;
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case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
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case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
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case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
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case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
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case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
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ret = client_certificate(s);
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if (ret <= 0)
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goto end;
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s->init_num = 0;
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s->state = SSL2_ST_GET_SERVER_FINISHED_A;
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break;
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case SSL_ST_OK:
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if (s->init_buf != NULL) {
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BUF_MEM_free(s->init_buf);
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s->init_buf = NULL;
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}
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s->init_num = 0;
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/* ERR_clear_error(); */
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/*
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* If we want to cache session-ids in the client and we
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* successfully add the session-id to the cache, and there is a
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* callback, then pass it out. 26/11/96 - eay - only add if not a
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* re-used session.
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*/
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ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
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if (s->hit)
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s->ctx->stats.sess_hit++;
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ret = 1;
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/* s->server=0; */
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s->ctx->stats.sess_connect_good++;
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if (cb != NULL)
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cb(s, SSL_CB_HANDSHAKE_DONE, 1);
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goto end;
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/* break; */
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default:
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SSLerr(SSL_F_SSL2_CONNECT, SSL_R_UNKNOWN_STATE);
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return (-1);
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/* break; */
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}
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if ((cb != NULL) && (s->state != state)) {
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new_state = s->state;
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s->state = state;
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cb(s, SSL_CB_CONNECT_LOOP, 1);
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s->state = new_state;
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}
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}
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end:
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s->in_handshake--;
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if (buf != NULL)
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BUF_MEM_free(buf);
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if (cb != NULL)
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cb(s, SSL_CB_CONNECT_EXIT, ret);
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return (ret);
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}
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static int get_server_hello(SSL *s)
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{
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unsigned char *buf;
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unsigned char *p;
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int i, j;
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unsigned long len;
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STACK_OF(SSL_CIPHER) *sk = NULL, *cl, *prio, *allow;
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buf = (unsigned char *)s->init_buf->data;
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p = buf;
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if (s->state == SSL2_ST_GET_SERVER_HELLO_A) {
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i = ssl2_read(s, (char *)&(buf[s->init_num]), 11 - s->init_num);
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if (i < (11 - s->init_num))
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return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i));
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s->init_num = 11;
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if (*(p++) != SSL2_MT_SERVER_HELLO) {
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if (p[-1] != SSL2_MT_ERROR) {
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ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
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SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_READ_WRONG_PACKET_TYPE);
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} else
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SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_PEER_ERROR);
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return (-1);
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}
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# if 0
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s->hit = (*(p++)) ? 1 : 0;
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/*
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* Some [PPC?] compilers fail to increment p in above statement, e.g.
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* one provided with Rhapsody 5.5, but most recent example XL C 11.1
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* for AIX, even without optimization flag...
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*/
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# else
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s->hit = (*p) ? 1 : 0;
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p++;
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# endif
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s->s2->tmp.cert_type = *(p++);
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n2s(p, i);
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if (i < s->version)
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s->version = i;
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n2s(p, i);
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s->s2->tmp.cert_length = i;
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n2s(p, i);
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s->s2->tmp.csl = i;
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n2s(p, i);
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s->s2->tmp.conn_id_length = i;
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s->state = SSL2_ST_GET_SERVER_HELLO_B;
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}
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|
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/* SSL2_ST_GET_SERVER_HELLO_B */
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len =
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11 + (unsigned long)s->s2->tmp.cert_length +
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(unsigned long)s->s2->tmp.csl +
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(unsigned long)s->s2->tmp.conn_id_length;
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if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) {
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SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_MESSAGE_TOO_LONG);
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return -1;
|
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}
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j = (int)len - s->init_num;
|
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i = ssl2_read(s, (char *)&(buf[s->init_num]), j);
|
|
if (i != j)
|
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return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i));
|
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if (s->msg_callback) {
|
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/* SERVER-HELLO */
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s->msg_callback(0, s->version, 0, buf, (size_t)len, s,
|
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s->msg_callback_arg);
|
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}
|
|
|
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/* things are looking good */
|
|
|
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p = buf + 11;
|
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if (s->hit) {
|
|
if (s->s2->tmp.cert_length != 0) {
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
|
|
return (-1);
|
|
}
|
|
if (s->s2->tmp.cert_type != 0) {
|
|
if (!(s->options & SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) {
|
|
SSLerr(SSL_F_GET_SERVER_HELLO,
|
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SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
|
|
return (-1);
|
|
}
|
|
}
|
|
if (s->s2->tmp.csl != 0) {
|
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SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
|
|
return (-1);
|
|
}
|
|
} else {
|
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# if 0
|
|
/* very bad */
|
|
memset(s->session->session_id, 0,
|
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SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
|
|
s->session->session_id_length = 0;
|
|
# endif
|
|
|
|
/*
|
|
* we need to do this in case we were trying to reuse a client
|
|
* session but others are already reusing it. If this was a new
|
|
* 'blank' session ID, the session-id length will still be 0
|
|
*/
|
|
if (s->session->session_id_length > 0) {
|
|
if (!ssl_get_new_session(s, 0)) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (ssl2_set_certificate(s, s->s2->tmp.cert_type,
|
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s->s2->tmp.cert_length, p) <= 0) {
|
|
ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE);
|
|
return (-1);
|
|
}
|
|
p += s->s2->tmp.cert_length;
|
|
|
|
if (s->s2->tmp.csl == 0) {
|
|
ssl2_return_error(s, SSL2_PE_NO_CIPHER);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_LIST);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* We have just received a list of ciphers back from the server. We
|
|
* need to get the ones that match, then select the one we want the
|
|
* most :-).
|
|
*/
|
|
|
|
/* load the ciphers */
|
|
sk = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.csl,
|
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&s->session->ciphers);
|
|
p += s->s2->tmp.csl;
|
|
if (sk == NULL) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
|
|
return (-1);
|
|
}
|
|
|
|
(void)sk_SSL_CIPHER_set_cmp_func(sk, ssl_cipher_ptr_id_cmp);
|
|
|
|
/* get the array of ciphers we will accept */
|
|
cl = SSL_get_ciphers(s);
|
|
(void)sk_SSL_CIPHER_set_cmp_func(cl, ssl_cipher_ptr_id_cmp);
|
|
|
|
/*
|
|
* If server preference flag set, choose the first
|
|
* (highest priority) cipher the server sends, otherwise
|
|
* client preference has priority.
|
|
*/
|
|
if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
|
|
prio = sk;
|
|
allow = cl;
|
|
} else {
|
|
prio = cl;
|
|
allow = sk;
|
|
}
|
|
/*
|
|
* In theory we could have ciphers sent back that we don't want to
|
|
* use but that does not matter since we will check against the list
|
|
* we originally sent and for performance reasons we should not
|
|
* bother to match the two lists up just to check.
|
|
*/
|
|
for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
|
|
if (sk_SSL_CIPHER_find(allow, sk_SSL_CIPHER_value(prio, i)) >= 0)
|
|
break;
|
|
}
|
|
|
|
if (i >= sk_SSL_CIPHER_num(prio)) {
|
|
ssl2_return_error(s, SSL2_PE_NO_CIPHER);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_MATCH);
|
|
return (-1);
|
|
}
|
|
s->session->cipher = sk_SSL_CIPHER_value(prio, i);
|
|
|
|
if (s->session->peer != NULL) { /* can't happen */
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
|
|
return (-1);
|
|
}
|
|
|
|
s->session->peer = s->session->sess_cert->peer_key->x509;
|
|
/* peer_key->x509 has been set by ssl2_set_certificate. */
|
|
CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
|
|
}
|
|
|
|
if (s->session->sess_cert == NULL
|
|
|| s->session->peer != s->session->sess_cert->peer_key->x509)
|
|
/* can't happen */
|
|
{
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
|
|
return (-1);
|
|
}
|
|
|
|
s->s2->conn_id_length = s->s2->tmp.conn_id_length;
|
|
if (s->s2->conn_id_length > sizeof(s->s2->conn_id)) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
|
|
return -1;
|
|
}
|
|
memcpy(s->s2->conn_id, p, s->s2->tmp.conn_id_length);
|
|
return (1);
|
|
}
|
|
|
|
static int client_hello(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p, *d;
|
|
/* CIPHER **cipher;*/
|
|
int i, n, j;
|
|
|
|
buf = (unsigned char *)s->init_buf->data;
|
|
if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) {
|
|
if ((s->session == NULL) || (s->session->ssl_version != s->version)) {
|
|
if (!ssl_get_new_session(s, 0)) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
return (-1);
|
|
}
|
|
}
|
|
/* else use the pre-loaded session */
|
|
|
|
p = buf; /* header */
|
|
d = p + 9; /* data section */
|
|
*(p++) = SSL2_MT_CLIENT_HELLO; /* type */
|
|
s2n(SSL2_VERSION, p); /* version */
|
|
n = j = 0;
|
|
|
|
n = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), d, 0);
|
|
d += n;
|
|
|
|
if (n == 0) {
|
|
SSLerr(SSL_F_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
|
|
return (-1);
|
|
}
|
|
|
|
s2n(n, p); /* cipher spec num bytes */
|
|
|
|
if ((s->session->session_id_length > 0) &&
|
|
(s->session->session_id_length <=
|
|
SSL2_MAX_SSL_SESSION_ID_LENGTH)) {
|
|
i = s->session->session_id_length;
|
|
s2n(i, p); /* session id length */
|
|
memcpy(d, s->session->session_id, (unsigned int)i);
|
|
d += i;
|
|
} else {
|
|
s2n(0, p);
|
|
}
|
|
|
|
s->s2->challenge_length = SSL2_CHALLENGE_LENGTH;
|
|
s2n(SSL2_CHALLENGE_LENGTH, p); /* challenge length */
|
|
/*
|
|
* challenge id data
|
|
*/
|
|
if (RAND_bytes(s->s2->challenge, SSL2_CHALLENGE_LENGTH) <= 0)
|
|
return -1;
|
|
memcpy(d, s->s2->challenge, SSL2_CHALLENGE_LENGTH);
|
|
d += SSL2_CHALLENGE_LENGTH;
|
|
|
|
s->state = SSL2_ST_SEND_CLIENT_HELLO_B;
|
|
s->init_num = d - buf;
|
|
s->init_off = 0;
|
|
}
|
|
/* SSL2_ST_SEND_CLIENT_HELLO_B */
|
|
return (ssl2_do_write(s));
|
|
}
|
|
|
|
static int client_master_key(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p, *d;
|
|
int clear, enc, karg, i;
|
|
SSL_SESSION *sess;
|
|
const EVP_CIPHER *c;
|
|
const EVP_MD *md;
|
|
|
|
buf = (unsigned char *)s->init_buf->data;
|
|
if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) {
|
|
|
|
if (!ssl_cipher_get_evp(s->session, &c, &md, NULL, NULL, NULL)) {
|
|
ssl2_return_error(s, SSL2_PE_NO_CIPHER);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY,
|
|
SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
|
|
return (-1);
|
|
}
|
|
sess = s->session;
|
|
p = buf;
|
|
d = p + 10;
|
|
*(p++) = SSL2_MT_CLIENT_MASTER_KEY; /* type */
|
|
|
|
i = ssl_put_cipher_by_char(s, sess->cipher, p);
|
|
p += i;
|
|
|
|
/* make key_arg data */
|
|
i = EVP_CIPHER_iv_length(c);
|
|
sess->key_arg_length = i;
|
|
if (i > SSL_MAX_KEY_ARG_LENGTH) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
if (i > 0)
|
|
if (RAND_bytes(sess->key_arg, i) <= 0)
|
|
return -1;
|
|
|
|
/* make a master key */
|
|
i = EVP_CIPHER_key_length(c);
|
|
sess->master_key_length = i;
|
|
if (i > 0) {
|
|
if (i > (int)sizeof(sess->master_key)) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
if (RAND_bytes(sess->master_key, i) <= 0) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
|
|
enc = 8;
|
|
else if (SSL_C_IS_EXPORT(sess->cipher))
|
|
enc = 5;
|
|
else
|
|
enc = i;
|
|
|
|
if ((int)i < enc) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_CIPHER_TABLE_SRC_ERROR);
|
|
return (-1);
|
|
}
|
|
clear = i - enc;
|
|
s2n(clear, p);
|
|
memcpy(d, sess->master_key, (unsigned int)clear);
|
|
d += clear;
|
|
|
|
enc = ssl_rsa_public_encrypt(sess->sess_cert, enc,
|
|
&(sess->master_key[clear]), d,
|
|
(s->
|
|
s2->ssl2_rollback) ? RSA_SSLV23_PADDING
|
|
: RSA_PKCS1_PADDING);
|
|
if (enc <= 0) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
|
|
return (-1);
|
|
}
|
|
# ifdef PKCS1_CHECK
|
|
if (s->options & SSL_OP_PKCS1_CHECK_1)
|
|
d[1]++;
|
|
if (s->options & SSL_OP_PKCS1_CHECK_2)
|
|
sess->master_key[clear]++;
|
|
# endif
|
|
s2n(enc, p);
|
|
d += enc;
|
|
karg = sess->key_arg_length;
|
|
s2n(karg, p); /* key arg size */
|
|
if (karg > (int)sizeof(sess->key_arg)) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
memcpy(d, sess->key_arg, (unsigned int)karg);
|
|
d += karg;
|
|
|
|
s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
|
|
s->init_num = d - buf;
|
|
s->init_off = 0;
|
|
}
|
|
|
|
/* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
|
|
return (ssl2_do_write(s));
|
|
}
|
|
|
|
static int client_finished(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
|
|
if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) {
|
|
p = (unsigned char *)s->init_buf->data;
|
|
*(p++) = SSL2_MT_CLIENT_FINISHED;
|
|
if (s->s2->conn_id_length > sizeof(s->s2->conn_id)) {
|
|
SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
memcpy(p, s->s2->conn_id, (unsigned int)s->s2->conn_id_length);
|
|
|
|
s->state = SSL2_ST_SEND_CLIENT_FINISHED_B;
|
|
s->init_num = s->s2->conn_id_length + 1;
|
|
s->init_off = 0;
|
|
}
|
|
return (ssl2_do_write(s));
|
|
}
|
|
|
|
/* read the data and then respond */
|
|
static int client_certificate(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p, *d;
|
|
int i;
|
|
unsigned int n;
|
|
int cert_ch_len;
|
|
unsigned char *cert_ch;
|
|
|
|
buf = (unsigned char *)s->init_buf->data;
|
|
|
|
/*
|
|
* We have a cert associated with the SSL, so attach it to the session if
|
|
* it does not have one
|
|
*/
|
|
|
|
if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) {
|
|
i = ssl2_read(s, (char *)&(buf[s->init_num]),
|
|
SSL2_MAX_CERT_CHALLENGE_LENGTH + 2 - s->init_num);
|
|
if (i < (SSL2_MIN_CERT_CHALLENGE_LENGTH + 2 - s->init_num))
|
|
return (ssl2_part_read(s, SSL_F_CLIENT_CERTIFICATE, i));
|
|
s->init_num += i;
|
|
if (s->msg_callback) {
|
|
/* REQUEST-CERTIFICATE */
|
|
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
|
|
/* type=buf[0]; */
|
|
/* type eq x509 */
|
|
if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) {
|
|
ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
|
|
SSLerr(SSL_F_CLIENT_CERTIFICATE, SSL_R_BAD_AUTHENTICATION_TYPE);
|
|
return (-1);
|
|
}
|
|
|
|
if ((s->cert == NULL) ||
|
|
(s->cert->key->x509 == NULL) ||
|
|
(s->cert->key->privatekey == NULL)) {
|
|
s->state = SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
|
|
} else
|
|
s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
|
|
}
|
|
|
|
cert_ch = buf + 2;
|
|
cert_ch_len = s->init_num - 2;
|
|
|
|
if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) {
|
|
X509 *x509 = NULL;
|
|
EVP_PKEY *pkey = NULL;
|
|
|
|
/*
|
|
* If we get an error we need to ssl->rwstate=SSL_X509_LOOKUP;
|
|
* return(error); We should then be retried when things are ok and we
|
|
* can get a cert or not
|
|
*/
|
|
|
|
i = 0;
|
|
if (s->ctx->client_cert_cb != NULL) {
|
|
i = s->ctx->client_cert_cb(s, &(x509), &(pkey));
|
|
}
|
|
|
|
if (i < 0) {
|
|
s->rwstate = SSL_X509_LOOKUP;
|
|
return (-1);
|
|
}
|
|
s->rwstate = SSL_NOTHING;
|
|
|
|
if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
|
|
s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
|
|
if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) {
|
|
i = 0;
|
|
}
|
|
X509_free(x509);
|
|
EVP_PKEY_free(pkey);
|
|
} else if (i == 1) {
|
|
if (x509 != NULL)
|
|
X509_free(x509);
|
|
if (pkey != NULL)
|
|
EVP_PKEY_free(pkey);
|
|
SSLerr(SSL_F_CLIENT_CERTIFICATE,
|
|
SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
|
|
i = 0;
|
|
}
|
|
|
|
if (i == 0) {
|
|
/*
|
|
* We have no client certificate to respond with so send the
|
|
* correct error message back
|
|
*/
|
|
s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
|
|
p = buf;
|
|
*(p++) = SSL2_MT_ERROR;
|
|
s2n(SSL2_PE_NO_CERTIFICATE, p);
|
|
s->init_off = 0;
|
|
s->init_num = 3;
|
|
/* Write is done at the end */
|
|
}
|
|
}
|
|
|
|
if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) {
|
|
return (ssl2_do_write(s));
|
|
}
|
|
|
|
if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) {
|
|
EVP_MD_CTX ctx;
|
|
|
|
/*
|
|
* ok, now we calculate the checksum do it first so we can reuse buf
|
|
* :-)
|
|
*/
|
|
p = buf;
|
|
EVP_MD_CTX_init(&ctx);
|
|
EVP_SignInit_ex(&ctx, s->ctx->rsa_md5, NULL);
|
|
EVP_SignUpdate(&ctx, s->s2->key_material, s->s2->key_material_length);
|
|
EVP_SignUpdate(&ctx, cert_ch, (unsigned int)cert_ch_len);
|
|
i = i2d_X509(s->session->sess_cert->peer_key->x509, &p);
|
|
/*
|
|
* Don't update the signature if it fails - FIXME: probably should
|
|
* handle this better
|
|
*/
|
|
if (i > 0)
|
|
EVP_SignUpdate(&ctx, buf, (unsigned int)i);
|
|
|
|
p = buf;
|
|
d = p + 6;
|
|
*(p++) = SSL2_MT_CLIENT_CERTIFICATE;
|
|
*(p++) = SSL2_CT_X509_CERTIFICATE;
|
|
n = i2d_X509(s->cert->key->x509, &d);
|
|
s2n(n, p);
|
|
|
|
if (!EVP_SignFinal(&ctx, d, &n, s->cert->key->privatekey)) {
|
|
/*
|
|
* this is not good. If things have failed it means there so
|
|
* something wrong with the key. We will continue with a 0 length
|
|
* signature
|
|
*/
|
|
}
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
s2n(n, p);
|
|
d += n;
|
|
|
|
s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
|
|
s->init_num = d - buf;
|
|
s->init_off = 0;
|
|
}
|
|
/* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
|
|
return (ssl2_do_write(s));
|
|
}
|
|
|
|
static int get_server_verify(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
int i, n, len;
|
|
|
|
p = (unsigned char *)s->init_buf->data;
|
|
if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) {
|
|
i = ssl2_read(s, (char *)&(p[s->init_num]), 1 - s->init_num);
|
|
if (i < (1 - s->init_num))
|
|
return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i));
|
|
s->init_num += i;
|
|
|
|
s->state = SSL2_ST_GET_SERVER_VERIFY_B;
|
|
if (*p != SSL2_MT_SERVER_VERIFY) {
|
|
if (p[0] != SSL2_MT_ERROR) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_READ_WRONG_PACKET_TYPE);
|
|
} else {
|
|
SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_PEER_ERROR);
|
|
/* try to read the error message */
|
|
i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num);
|
|
return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i);
|
|
}
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
p = (unsigned char *)s->init_buf->data;
|
|
len = 1 + s->s2->challenge_length;
|
|
n = len - s->init_num;
|
|
i = ssl2_read(s, (char *)&(p[s->init_num]), n);
|
|
if (i < n)
|
|
return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i));
|
|
if (s->msg_callback) {
|
|
/* SERVER-VERIFY */
|
|
s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg);
|
|
}
|
|
p += 1;
|
|
|
|
if (CRYPTO_memcmp(p, s->s2->challenge, s->s2->challenge_length) != 0) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_CHALLENGE_IS_DIFFERENT);
|
|
return (-1);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static int get_server_finished(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p;
|
|
int i, n, len;
|
|
|
|
buf = (unsigned char *)s->init_buf->data;
|
|
p = buf;
|
|
if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) {
|
|
i = ssl2_read(s, (char *)&(buf[s->init_num]), 1 - s->init_num);
|
|
if (i < (1 - s->init_num))
|
|
return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i));
|
|
s->init_num += i;
|
|
|
|
if (*p == SSL2_MT_REQUEST_CERTIFICATE) {
|
|
s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
|
|
return (1);
|
|
} else if (*p != SSL2_MT_SERVER_FINISHED) {
|
|
if (p[0] != SSL2_MT_ERROR) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_FINISHED,
|
|
SSL_R_READ_WRONG_PACKET_TYPE);
|
|
} else {
|
|
SSLerr(SSL_F_GET_SERVER_FINISHED, SSL_R_PEER_ERROR);
|
|
/* try to read the error message */
|
|
i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num);
|
|
return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i);
|
|
}
|
|
return (-1);
|
|
}
|
|
s->state = SSL2_ST_GET_SERVER_FINISHED_B;
|
|
}
|
|
|
|
len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
|
|
n = len - s->init_num;
|
|
i = ssl2_read(s, (char *)&(buf[s->init_num]), n);
|
|
if (i < n) {
|
|
/*
|
|
* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH,
|
|
* that's the maximum
|
|
*/
|
|
return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i));
|
|
}
|
|
s->init_num += i;
|
|
if (s->msg_callback) {
|
|
/* SERVER-FINISHED */
|
|
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
|
|
if (!s->hit) { /* new session */
|
|
/* new session-id */
|
|
/*
|
|
* Make sure we were not trying to re-use an old SSL_SESSION or bad
|
|
* things can happen
|
|
*/
|
|
/* ZZZZZZZZZZZZZ */
|
|
s->session->session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
|
|
memcpy(s->session->session_id, p + 1, SSL2_SSL_SESSION_ID_LENGTH);
|
|
} else {
|
|
if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) {
|
|
if ((s->session->session_id_length >
|
|
sizeof(s->session->session_id))
|
|
|| (0 !=
|
|
memcmp(buf + 1, s->session->session_id,
|
|
(unsigned int)s->session->session_id_length))) {
|
|
ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_FINISHED,
|
|
SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
|
|
return (-1);
|
|
}
|
|
}
|
|
}
|
|
s->state = SSL_ST_OK;
|
|
return (1);
|
|
}
|
|
|
|
/* loads in the certificate from the server */
|
|
int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
|
|
{
|
|
STACK_OF(X509) *sk = NULL;
|
|
EVP_PKEY *pkey = NULL;
|
|
SESS_CERT *sc = NULL;
|
|
int i;
|
|
X509 *x509 = NULL;
|
|
int ret = 0;
|
|
|
|
x509 = d2i_X509(NULL, &data, (long)len);
|
|
if (x509 == NULL) {
|
|
SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_X509_LIB);
|
|
goto err;
|
|
}
|
|
|
|
if ((sk = sk_X509_new_null()) == NULL || !sk_X509_push(sk, x509)) {
|
|
SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
i = ssl_verify_cert_chain(s, sk);
|
|
|
|
if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) {
|
|
SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_CERTIFICATE_VERIFY_FAILED);
|
|
goto err;
|
|
}
|
|
ERR_clear_error(); /* but we keep s->verify_result */
|
|
s->session->verify_result = s->verify_result;
|
|
|
|
/* server's cert for this session */
|
|
sc = ssl_sess_cert_new();
|
|
if (sc == NULL) {
|
|
ret = -1;
|
|
goto err;
|
|
}
|
|
if (s->session->sess_cert)
|
|
ssl_sess_cert_free(s->session->sess_cert);
|
|
s->session->sess_cert = sc;
|
|
|
|
sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509 = x509;
|
|
sc->peer_key = &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
|
|
|
|
pkey = X509_get_pubkey(x509);
|
|
x509 = NULL;
|
|
if (pkey == NULL) {
|
|
SSLerr(SSL_F_SSL2_SET_CERTIFICATE,
|
|
SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
|
|
goto err;
|
|
}
|
|
if (pkey->type != EVP_PKEY_RSA) {
|
|
SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_PUBLIC_KEY_NOT_RSA);
|
|
goto err;
|
|
}
|
|
|
|
if (!ssl_set_peer_cert_type(sc, SSL2_CT_X509_CERTIFICATE))
|
|
goto err;
|
|
ret = 1;
|
|
err:
|
|
sk_X509_free(sk);
|
|
X509_free(x509);
|
|
EVP_PKEY_free(pkey);
|
|
return (ret);
|
|
}
|
|
|
|
static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
|
|
unsigned char *to, int padding)
|
|
{
|
|
EVP_PKEY *pkey = NULL;
|
|
int i = -1;
|
|
|
|
if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
|
|
((pkey = X509_get_pubkey(sc->peer_key->x509)) == NULL)) {
|
|
SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_NO_PUBLICKEY);
|
|
return (-1);
|
|
}
|
|
if (pkey->type != EVP_PKEY_RSA) {
|
|
SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA);
|
|
goto end;
|
|
}
|
|
|
|
/* we have the public key */
|
|
i = RSA_public_encrypt(len, from, to, pkey->pkey.rsa, padding);
|
|
if (i < 0)
|
|
SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, ERR_R_RSA_LIB);
|
|
end:
|
|
EVP_PKEY_free(pkey);
|
|
return (i);
|
|
}
|
|
#else /* !OPENSSL_NO_SSL2 */
|
|
|
|
# if PEDANTIC
|
|
static void *dummy = &dummy;
|
|
# endif
|
|
|
|
#endif
|