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1125 lines
30 KiB
1125 lines
30 KiB
/* 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
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
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* 3. All advertising materials mentioning features or use of this software
|
|
* 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
|
|
* 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
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* 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,
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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)) SSL_clear(s);
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for (;;)
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{
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state=s->state;
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switch (s->state)
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{
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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) 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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{
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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,
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SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
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{
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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) 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) goto end;
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s->init_num=0;
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if (!s->hit) /* new session */
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{
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s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
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BREAK;
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}
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else
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{
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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) 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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/* Ok, we now have all the stuff needed to
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* start encrypting, so lets fire it up :-) */
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if (!ssl2_enc_init(s,1))
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{
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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) 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) 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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|
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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) goto end;
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break;
|
|
|
|
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) goto end;
|
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s->init_num=0;
|
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s->state=SSL2_ST_GET_SERVER_FINISHED_A;
|
|
break;
|
|
|
|
case SSL_ST_OK:
|
|
if (s->init_buf != NULL)
|
|
{
|
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BUF_MEM_free(s->init_buf);
|
|
s->init_buf=NULL;
|
|
}
|
|
s->init_num=0;
|
|
/* ERR_clear_error();*/
|
|
|
|
/* If we want to cache session-ids in the client
|
|
* and we successfully add the session-id to the
|
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* cache, and there is a callback, then pass it out.
|
|
* 26/11/96 - eay - only add if not a re-used session.
|
|
*/
|
|
|
|
ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
|
|
if (s->hit) s->ctx->stats.sess_hit++;
|
|
|
|
ret=1;
|
|
/* s->server=0; */
|
|
s->ctx->stats.sess_connect_good++;
|
|
|
|
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
|
|
|
|
goto end;
|
|
/* break; */
|
|
default:
|
|
SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
|
|
return(-1);
|
|
/* break; */
|
|
}
|
|
|
|
if ((cb != NULL) && (s->state != state))
|
|
{
|
|
new_state=s->state;
|
|
s->state=state;
|
|
cb(s,SSL_CB_CONNECT_LOOP,1);
|
|
s->state=new_state;
|
|
}
|
|
}
|
|
end:
|
|
s->in_handshake--;
|
|
if (buf != NULL)
|
|
BUF_MEM_free(buf);
|
|
if (cb != NULL)
|
|
cb(s,SSL_CB_CONNECT_EXIT,ret);
|
|
return(ret);
|
|
}
|
|
|
|
static int get_server_hello(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p;
|
|
int i,j;
|
|
unsigned long len;
|
|
STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
|
|
|
|
buf=(unsigned char *)s->init_buf->data;
|
|
p=buf;
|
|
if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
|
|
{
|
|
i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
|
|
if (i < (11-s->init_num))
|
|
return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
|
|
s->init_num = 11;
|
|
|
|
if (*(p++) != SSL2_MT_SERVER_HELLO)
|
|
{
|
|
if (p[-1] != SSL2_MT_ERROR)
|
|
{
|
|
ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
|
|
SSLerr(SSL_F_GET_SERVER_HELLO,
|
|
SSL_R_READ_WRONG_PACKET_TYPE);
|
|
}
|
|
else
|
|
SSLerr(SSL_F_GET_SERVER_HELLO,
|
|
SSL_R_PEER_ERROR);
|
|
return(-1);
|
|
}
|
|
#ifdef __APPLE_CC__
|
|
/* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
|
|
* workaround. <appro@fy.chalmers.se> */
|
|
s->hit=(i=*(p++))?1:0;
|
|
#else
|
|
s->hit=(*(p++))?1:0;
|
|
#endif
|
|
s->s2->tmp.cert_type= *(p++);
|
|
n2s(p,i);
|
|
if (i < s->version) s->version=i;
|
|
n2s(p,i); s->s2->tmp.cert_length=i;
|
|
n2s(p,i); s->s2->tmp.csl=i;
|
|
n2s(p,i); s->s2->tmp.conn_id_length=i;
|
|
s->state=SSL2_ST_GET_SERVER_HELLO_B;
|
|
}
|
|
|
|
/* SSL2_ST_GET_SERVER_HELLO_B */
|
|
len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
|
|
if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
|
|
{
|
|
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
|
|
return -1;
|
|
}
|
|
j = (int)len - s->init_num;
|
|
i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
|
|
if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
|
|
if (s->msg_callback)
|
|
s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
|
|
|
|
/* things are looking good */
|
|
|
|
p = buf + 11;
|
|
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,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
|
|
return(-1);
|
|
}
|
|
}
|
|
if (s->s2->tmp.csl != 0)
|
|
{
|
|
SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
|
|
return(-1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
#ifdef undef
|
|
/* very bad */
|
|
memset(s->session->session_id,0,
|
|
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,
|
|
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,
|
|
&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_pseudo_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_pseudo_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)
|
|
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
|
|
|
|
/* 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)
|
|
s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
|
|
p += 1;
|
|
|
|
if (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)
|
|
s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
|
|
|
|
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
|
|
|