806 lines
26 KiB
C
806 lines
26 KiB
C
/* ssl/s23_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) 1998-2006 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 <stdio.h>
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#include "ssl_locl.h"
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#include <openssl/buffer.h>
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#include <openssl/rand.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 *ssl23_get_client_method(int ver);
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static int ssl23_client_hello(SSL *s);
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static int ssl23_get_server_hello(SSL *s);
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static const SSL_METHOD *ssl23_get_client_method(int ver)
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{
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#ifndef OPENSSL_NO_SSL2
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if (ver == SSL2_VERSION)
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return (SSLv2_client_method());
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#endif
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#ifndef OPENSSL_NO_SSL3
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if (ver == SSL3_VERSION)
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return (SSLv3_client_method());
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#endif
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if (ver == TLS1_VERSION)
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return (TLSv1_client_method());
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else if (ver == TLS1_1_VERSION)
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return (TLSv1_1_client_method());
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else if (ver == TLS1_2_VERSION)
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return (TLSv1_2_client_method());
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else
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return (NULL);
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}
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IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
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ssl_undefined_function,
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ssl23_connect, ssl23_get_client_method)
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int ssl23_connect(SSL *s)
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{
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BUF_MEM *buf = NULL;
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unsigned long Time = (unsigned long)time(NULL);
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void (*cb) (const SSL *ssl, int type, int val) = NULL;
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int ret = -1;
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int new_state, state;
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RAND_add(&Time, sizeof(Time), 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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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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if (s->session != NULL) {
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SSLerr(SSL_F_SSL23_CONNECT,
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SSL_R_SSL23_DOING_SESSION_ID_REUSE);
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ret = -1;
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goto end;
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}
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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=TLS1_VERSION; */
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s->type = SSL_ST_CONNECT;
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if (s->init_buf == NULL) {
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if ((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, SSL3_RT_MAX_PLAIN_LENGTH)) {
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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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}
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if (!ssl3_setup_buffers(s)) {
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ret = -1;
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goto end;
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}
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if (!ssl3_init_finished_mac(s)) {
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ret = -1;
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goto end;
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}
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s->state = SSL23_ST_CW_CLNT_HELLO_A;
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s->ctx->stats.sess_connect++;
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s->init_num = 0;
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break;
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case SSL23_ST_CW_CLNT_HELLO_A:
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case SSL23_ST_CW_CLNT_HELLO_B:
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s->shutdown = 0;
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ret = ssl23_client_hello(s);
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if (ret <= 0)
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goto end;
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s->state = SSL23_ST_CR_SRVR_HELLO_A;
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s->init_num = 0;
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break;
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case SSL23_ST_CR_SRVR_HELLO_A:
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case SSL23_ST_CR_SRVR_HELLO_B:
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ret = ssl23_get_server_hello(s);
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if (ret >= 0)
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cb = NULL;
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goto end;
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/* break; */
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default:
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SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE);
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ret = -1;
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goto end;
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/* break; */
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}
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if (s->debug) {
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(void)BIO_flush(s->wbio);
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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 ssl23_no_ssl2_ciphers(SSL *s)
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{
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SSL_CIPHER *cipher;
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STACK_OF(SSL_CIPHER) *ciphers;
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int i;
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ciphers = SSL_get_ciphers(s);
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for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
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cipher = sk_SSL_CIPHER_value(ciphers, i);
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if (cipher->algorithm_ssl == SSL_SSLV2)
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return 0;
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}
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return 1;
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}
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/*
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* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
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* failure, 1 on success.
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*/
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int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
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{
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int send_time = 0;
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if (len < 4)
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return 0;
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if (server)
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send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
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else
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send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
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if (send_time) {
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unsigned long Time = (unsigned long)time(NULL);
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unsigned char *p = result;
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l2n(Time, p);
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return RAND_bytes(p, len - 4);
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} else
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return RAND_bytes(result, len);
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}
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static int ssl23_client_hello(SSL *s)
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{
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unsigned char *buf;
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unsigned char *p, *d;
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int i, ch_len;
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unsigned long l;
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int ssl2_compat;
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int version = 0, version_major, version_minor;
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int al = 0;
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#ifndef OPENSSL_NO_COMP
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int j;
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SSL_COMP *comp;
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#endif
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int ret;
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unsigned long mask, options = s->options;
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ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1;
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if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
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ssl2_compat = 0;
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/*
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* SSL_OP_NO_X disables all protocols above X *if* there are
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* some protocols below X enabled. This is required in order
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* to maintain "version capability" vector contiguous. So
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* that if application wants to disable TLS1.0 in favour of
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* TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
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* answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
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*/
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mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
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#if !defined(OPENSSL_NO_SSL3)
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| SSL_OP_NO_SSLv3
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#endif
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#if !defined(OPENSSL_NO_SSL2)
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| (ssl2_compat ? SSL_OP_NO_SSLv2 : 0)
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#endif
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;
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#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
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version = TLS1_2_VERSION;
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if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
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version = TLS1_1_VERSION;
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#else
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version = TLS1_1_VERSION;
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#endif
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mask &= ~SSL_OP_NO_TLSv1_1;
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if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
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version = TLS1_VERSION;
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mask &= ~SSL_OP_NO_TLSv1;
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#if !defined(OPENSSL_NO_SSL3)
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if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
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version = SSL3_VERSION;
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mask &= ~SSL_OP_NO_SSLv3;
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#endif
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#if !defined(OPENSSL_NO_SSL2)
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if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask)
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version = SSL2_VERSION;
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#endif
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#ifndef OPENSSL_NO_TLSEXT
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if (version != SSL2_VERSION) {
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/*
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* have to disable SSL 2.0 compatibility if we need TLS extensions
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*/
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if (s->tlsext_hostname != NULL)
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ssl2_compat = 0;
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if (s->tlsext_status_type != -1)
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ssl2_compat = 0;
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# ifdef TLSEXT_TYPE_opaque_prf_input
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if (s->ctx->tlsext_opaque_prf_input_callback != 0
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|| s->tlsext_opaque_prf_input != NULL)
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ssl2_compat = 0;
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# endif
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if (s->cert->cli_ext.meths_count != 0)
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ssl2_compat = 0;
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}
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#endif
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buf = (unsigned char *)s->init_buf->data;
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if (s->state == SSL23_ST_CW_CLNT_HELLO_A) {
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/*
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* Since we're sending s23 client hello, we're not reusing a session, as
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* we'd be using the method from the saved session instead
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*/
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if (!ssl_get_new_session(s, 0)) {
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return -1;
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}
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p = s->s3->client_random;
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if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
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return -1;
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if (version == TLS1_2_VERSION) {
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version_major = TLS1_2_VERSION_MAJOR;
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version_minor = TLS1_2_VERSION_MINOR;
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} else if (tls1_suiteb(s)) {
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SSLerr(SSL_F_SSL23_CLIENT_HELLO,
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SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
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return -1;
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} else if (version == TLS1_1_VERSION) {
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version_major = TLS1_1_VERSION_MAJOR;
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version_minor = TLS1_1_VERSION_MINOR;
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} else if (version == TLS1_VERSION) {
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version_major = TLS1_VERSION_MAJOR;
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version_minor = TLS1_VERSION_MINOR;
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}
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#ifdef OPENSSL_FIPS
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else if (FIPS_mode()) {
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SSLerr(SSL_F_SSL23_CLIENT_HELLO,
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SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
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return -1;
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}
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#endif
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else if (version == SSL3_VERSION) {
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version_major = SSL3_VERSION_MAJOR;
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version_minor = SSL3_VERSION_MINOR;
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} else if (version == SSL2_VERSION) {
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version_major = SSL2_VERSION_MAJOR;
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version_minor = SSL2_VERSION_MINOR;
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} else {
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SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE);
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return (-1);
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}
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s->client_version = version;
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if (ssl2_compat) {
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/* create SSL 2.0 compatible Client Hello */
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/* two byte record header will be written last */
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d = &(buf[2]);
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p = d + 9; /* leave space for message type, version,
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* individual length fields */
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*(d++) = SSL2_MT_CLIENT_HELLO;
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*(d++) = version_major;
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*(d++) = version_minor;
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/* Ciphers supported */
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i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), p, 0);
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if (i == 0) {
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/* no ciphers */
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SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
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return -1;
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}
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s2n(i, d);
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p += i;
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/*
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* put in the session-id length (zero since there is no reuse)
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*/
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s2n(0, d);
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if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
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ch_len = SSL2_CHALLENGE_LENGTH;
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else
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ch_len = SSL2_MAX_CHALLENGE_LENGTH;
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/* write out sslv2 challenge */
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/*
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* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it
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* is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
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* SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
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* futurproofing
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*/
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if (SSL3_RANDOM_SIZE < ch_len)
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i = SSL3_RANDOM_SIZE;
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else
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i = ch_len;
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s2n(i, d);
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memset(&(s->s3->client_random[0]), 0, SSL3_RANDOM_SIZE);
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if (RAND_bytes (&(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i)
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<= 0)
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return -1;
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memcpy(p, &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i);
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p += i;
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i = p - &(buf[2]);
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buf[0] = ((i >> 8) & 0xff) | 0x80;
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buf[1] = (i & 0xff);
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/* number of bytes to write */
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s->init_num = i + 2;
|
|
s->init_off = 0;
|
|
|
|
ssl3_finish_mac(s, &(buf[2]), i);
|
|
} else {
|
|
/* create Client Hello in SSL 3.0/TLS 1.0 format */
|
|
|
|
/*
|
|
* do the record header (5 bytes) and handshake message header (4
|
|
* bytes) last
|
|
*/
|
|
d = p = &(buf[9]);
|
|
|
|
*(p++) = version_major;
|
|
*(p++) = version_minor;
|
|
|
|
/* Random stuff */
|
|
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
|
|
p += SSL3_RANDOM_SIZE;
|
|
|
|
/* Session ID (zero since there is no reuse) */
|
|
*(p++) = 0;
|
|
|
|
/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
|
|
i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]),
|
|
ssl3_put_cipher_by_char);
|
|
if (i == 0) {
|
|
SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
|
|
return -1;
|
|
}
|
|
#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
|
|
/*
|
|
* Some servers hang if client hello > 256 bytes as hack
|
|
* workaround chop number of supported ciphers to keep it well
|
|
* below this if we use TLS v1.2
|
|
*/
|
|
if (TLS1_get_version(s) >= TLS1_2_VERSION
|
|
&& i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
|
|
i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
|
|
#endif
|
|
s2n(i, p);
|
|
p += i;
|
|
|
|
/* COMPRESSION */
|
|
#ifdef OPENSSL_NO_COMP
|
|
*(p++) = 1;
|
|
#else
|
|
if ((s->options & SSL_OP_NO_COMPRESSION)
|
|
|| !s->ctx->comp_methods)
|
|
j = 0;
|
|
else
|
|
j = sk_SSL_COMP_num(s->ctx->comp_methods);
|
|
*(p++) = 1 + j;
|
|
for (i = 0; i < j; i++) {
|
|
comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
|
|
*(p++) = comp->id;
|
|
}
|
|
#endif
|
|
*(p++) = 0; /* Add the NULL method */
|
|
|
|
#ifndef OPENSSL_NO_TLSEXT
|
|
/* TLS extensions */
|
|
if (ssl_prepare_clienthello_tlsext(s) <= 0) {
|
|
SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
|
|
return -1;
|
|
}
|
|
if ((p =
|
|
ssl_add_clienthello_tlsext(s, p,
|
|
buf + SSL3_RT_MAX_PLAIN_LENGTH,
|
|
&al)) == NULL) {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
|
SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
l = p - d;
|
|
|
|
/* fill in 4-byte handshake header */
|
|
d = &(buf[5]);
|
|
*(d++) = SSL3_MT_CLIENT_HELLO;
|
|
l2n3(l, d);
|
|
|
|
l += 4;
|
|
|
|
if (l > SSL3_RT_MAX_PLAIN_LENGTH) {
|
|
SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
/* fill in 5-byte record header */
|
|
d = buf;
|
|
*(d++) = SSL3_RT_HANDSHAKE;
|
|
*(d++) = version_major;
|
|
/*
|
|
* Some servers hang if we use long client hellos and a record
|
|
* number > TLS 1.0.
|
|
*/
|
|
if (TLS1_get_client_version(s) > TLS1_VERSION)
|
|
*(d++) = 1;
|
|
else
|
|
*(d++) = version_minor;
|
|
s2n((int)l, d);
|
|
|
|
/* number of bytes to write */
|
|
s->init_num = p - buf;
|
|
s->init_off = 0;
|
|
|
|
ssl3_finish_mac(s, &(buf[5]), s->init_num - 5);
|
|
}
|
|
|
|
s->state = SSL23_ST_CW_CLNT_HELLO_B;
|
|
s->init_off = 0;
|
|
}
|
|
|
|
/* SSL3_ST_CW_CLNT_HELLO_B */
|
|
ret = ssl23_write_bytes(s);
|
|
|
|
if ((ret >= 2) && s->msg_callback) {
|
|
/* Client Hello has been sent; tell msg_callback */
|
|
|
|
if (ssl2_compat)
|
|
s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data + 2,
|
|
ret - 2, s, s->msg_callback_arg);
|
|
else {
|
|
s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5,
|
|
s, s->msg_callback_arg);
|
|
s->msg_callback(1, version, SSL3_RT_HANDSHAKE,
|
|
s->init_buf->data + 5, ret - 5, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ssl23_get_server_hello(SSL *s)
|
|
{
|
|
char buf[8];
|
|
unsigned char *p;
|
|
int i;
|
|
int n;
|
|
|
|
n = ssl23_read_bytes(s, 7);
|
|
|
|
if (n != 7)
|
|
return (n);
|
|
p = s->packet;
|
|
|
|
memcpy(buf, p, n);
|
|
|
|
if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
|
|
(p[5] == 0x00) && (p[6] == 0x02)) {
|
|
#ifdef OPENSSL_NO_SSL2
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
|
|
goto err;
|
|
#else
|
|
/* we are talking sslv2 */
|
|
/*
|
|
* we need to clean up the SSLv3 setup and put in the sslv2 stuff.
|
|
*/
|
|
int ch_len;
|
|
|
|
if (s->options & SSL_OP_NO_SSLv2) {
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
|
|
goto err;
|
|
}
|
|
if (s->s2 == NULL) {
|
|
if (!ssl2_new(s))
|
|
goto err;
|
|
} else
|
|
ssl2_clear(s);
|
|
|
|
if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
|
|
ch_len = SSL2_CHALLENGE_LENGTH;
|
|
else
|
|
ch_len = SSL2_MAX_CHALLENGE_LENGTH;
|
|
|
|
/* write out sslv2 challenge */
|
|
/*
|
|
* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it is
|
|
* one of SSL2_MAX_CHALLENGE_LENGTH (32) or SSL2_MAX_CHALLENGE_LENGTH
|
|
* (16), but leave the check in for futurproofing
|
|
*/
|
|
i = (SSL3_RANDOM_SIZE < ch_len)
|
|
? SSL3_RANDOM_SIZE : ch_len;
|
|
s->s2->challenge_length = i;
|
|
memcpy(s->s2->challenge,
|
|
&(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i);
|
|
|
|
if (s->s3 != NULL)
|
|
ssl3_free(s);
|
|
|
|
if (!BUF_MEM_grow_clean(s->init_buf,
|
|
SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) {
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, ERR_R_BUF_LIB);
|
|
goto err;
|
|
}
|
|
|
|
s->state = SSL2_ST_GET_SERVER_HELLO_A;
|
|
if (!(s->client_version == SSL2_VERSION))
|
|
/*
|
|
* use special padding (SSL 3.0 draft/RFC 2246, App. E.2)
|
|
*/
|
|
s->s2->ssl2_rollback = 1;
|
|
|
|
/*
|
|
* setup the 7 bytes we have read so we get them from the sslv2
|
|
* buffer
|
|
*/
|
|
s->rstate = SSL_ST_READ_HEADER;
|
|
s->packet_length = n;
|
|
s->packet = &(s->s2->rbuf[0]);
|
|
memcpy(s->packet, buf, n);
|
|
s->s2->rbuf_left = n;
|
|
s->s2->rbuf_offs = 0;
|
|
|
|
/* we have already written one */
|
|
s->s2->write_sequence = 1;
|
|
|
|
s->method = SSLv2_client_method();
|
|
s->handshake_func = s->method->ssl_connect;
|
|
#endif
|
|
} else if (p[1] == SSL3_VERSION_MAJOR &&
|
|
p[2] <= TLS1_2_VERSION_MINOR &&
|
|
((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
|
|
(p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) {
|
|
/* we have sslv3 or tls1 (server hello or alert) */
|
|
|
|
#ifndef OPENSSL_NO_SSL3
|
|
if ((p[2] == SSL3_VERSION_MINOR) && !(s->options & SSL_OP_NO_SSLv3)) {
|
|
# ifdef OPENSSL_FIPS
|
|
if (FIPS_mode()) {
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
|
|
SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
|
|
goto err;
|
|
}
|
|
# endif
|
|
s->version = SSL3_VERSION;
|
|
s->method = SSLv3_client_method();
|
|
} else
|
|
#endif
|
|
if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) {
|
|
s->version = TLS1_VERSION;
|
|
s->method = TLSv1_client_method();
|
|
} else if ((p[2] == TLS1_1_VERSION_MINOR) &&
|
|
!(s->options & SSL_OP_NO_TLSv1_1)) {
|
|
s->version = TLS1_1_VERSION;
|
|
s->method = TLSv1_1_client_method();
|
|
} else if ((p[2] == TLS1_2_VERSION_MINOR) &&
|
|
!(s->options & SSL_OP_NO_TLSv1_2)) {
|
|
s->version = TLS1_2_VERSION;
|
|
s->method = TLSv1_2_client_method();
|
|
} else {
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
|
|
goto err;
|
|
}
|
|
|
|
s->session->ssl_version = s->version;
|
|
|
|
/* ensure that TLS_MAX_VERSION is up-to-date */
|
|
OPENSSL_assert(s->version <= TLS_MAX_VERSION);
|
|
|
|
if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) {
|
|
/* fatal alert */
|
|
|
|
void (*cb) (const SSL *ssl, int type, int val) = NULL;
|
|
int j;
|
|
|
|
if (s->info_callback != NULL)
|
|
cb = s->info_callback;
|
|
else if (s->ctx->info_callback != NULL)
|
|
cb = s->ctx->info_callback;
|
|
|
|
i = p[5];
|
|
if (cb != NULL) {
|
|
j = (i << 8) | p[6];
|
|
cb(s, SSL_CB_READ_ALERT, j);
|
|
}
|
|
|
|
if (s->msg_callback) {
|
|
s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s,
|
|
s->msg_callback_arg);
|
|
s->msg_callback(0, s->version, SSL3_RT_ALERT, p + 5, 2, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
|
|
s->rwstate = SSL_NOTHING;
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_AD_REASON_OFFSET + p[6]);
|
|
goto err;
|
|
}
|
|
|
|
if (!ssl_init_wbio_buffer(s, 1))
|
|
goto err;
|
|
|
|
/* we are in this state */
|
|
s->state = SSL3_ST_CR_SRVR_HELLO_A;
|
|
|
|
/*
|
|
* put the 7 bytes we have read into the input buffer for SSLv3
|
|
*/
|
|
s->rstate = SSL_ST_READ_HEADER;
|
|
s->packet_length = n;
|
|
if (s->s3->rbuf.buf == NULL)
|
|
if (!ssl3_setup_read_buffer(s))
|
|
goto err;
|
|
s->packet = &(s->s3->rbuf.buf[0]);
|
|
memcpy(s->packet, buf, n);
|
|
s->s3->rbuf.left = n;
|
|
s->s3->rbuf.offset = 0;
|
|
|
|
s->handshake_func = s->method->ssl_connect;
|
|
} else {
|
|
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL);
|
|
goto err;
|
|
}
|
|
s->init_num = 0;
|
|
|
|
return (SSL_connect(s));
|
|
err:
|
|
return (-1);
|
|
}
|