75e3026a14
I've covered all the memset()s I felt safe modifying, but may have missed some.
1977 lines
48 KiB
C
1977 lines
48 KiB
C
/* ssl/s3_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) 1998-2002 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 "kssl_lcl.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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#include <openssl/md5.h>
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#include "cryptlib.h"
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static SSL_METHOD *ssl3_get_client_method(int ver);
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static int ssl3_client_hello(SSL *s);
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static int ssl3_get_server_hello(SSL *s);
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static int ssl3_get_certificate_request(SSL *s);
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static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
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static int ssl3_get_server_done(SSL *s);
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static int ssl3_send_client_verify(SSL *s);
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static int ssl3_send_client_certificate(SSL *s);
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static int ssl3_send_client_key_exchange(SSL *s);
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static int ssl3_get_key_exchange(SSL *s);
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static int ssl3_get_server_certificate(SSL *s);
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static int ssl3_check_cert_and_algorithm(SSL *s);
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static SSL_METHOD *ssl3_get_client_method(int ver)
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{
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if (ver == SSL3_VERSION)
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return(SSLv3_client_method());
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else
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return(NULL);
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}
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SSL_METHOD *SSLv3_client_method(void)
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{
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static int init=1;
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static SSL_METHOD SSLv3_client_data;
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if (init)
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{
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CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
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if (init)
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{
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memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
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sizeof(SSL_METHOD));
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SSLv3_client_data.ssl_connect=ssl3_connect;
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SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
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init=0;
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
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}
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return(&SSLv3_client_data);
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}
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int ssl3_connect(SSL *s)
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{
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BUF_MEM *buf;
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unsigned long Time=time(NULL),l;
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long num1;
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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,skip=0;;
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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)) 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_RENEGOTIATE:
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s->new_session=1;
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s->state=SSL_ST_CONNECT;
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s->ctx->stats.sess_connect_renegotiate++;
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/* break */
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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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if ((s->version & 0xff00 ) != 0x0300)
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{
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SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
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ret = -1;
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goto end;
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}
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/* s->version=SSL3_VERSION; */
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s->type=SSL_ST_CONNECT;
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if (s->init_buf == NULL)
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{
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if ((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,SSL3_RT_MAX_PLAIN_LENGTH))
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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->init_buf=buf;
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}
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if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
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/* setup buffing BIO */
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if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
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/* don't push the buffering BIO quite yet */
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ssl3_init_finished_mac(s);
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s->state=SSL3_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 SSL3_ST_CW_CLNT_HELLO_A:
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case SSL3_ST_CW_CLNT_HELLO_B:
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s->shutdown=0;
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ret=ssl3_client_hello(s);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CR_SRVR_HELLO_A;
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s->init_num=0;
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/* turn on buffering for the next lot of output */
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if (s->bbio != s->wbio)
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s->wbio=BIO_push(s->bbio,s->wbio);
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break;
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case SSL3_ST_CR_SRVR_HELLO_A:
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case SSL3_ST_CR_SRVR_HELLO_B:
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ret=ssl3_get_server_hello(s);
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if (ret <= 0) goto end;
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if (s->hit)
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s->state=SSL3_ST_CR_FINISHED_A;
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else
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s->state=SSL3_ST_CR_CERT_A;
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s->init_num=0;
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break;
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case SSL3_ST_CR_CERT_A:
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case SSL3_ST_CR_CERT_B:
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/* Check if it is anon DH */
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if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
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{
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ret=ssl3_get_server_certificate(s);
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if (ret <= 0) goto end;
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}
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else
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skip=1;
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s->state=SSL3_ST_CR_KEY_EXCH_A;
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s->init_num=0;
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break;
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case SSL3_ST_CR_KEY_EXCH_A:
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case SSL3_ST_CR_KEY_EXCH_B:
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ret=ssl3_get_key_exchange(s);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CR_CERT_REQ_A;
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s->init_num=0;
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/* at this point we check that we have the
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* required stuff from the server */
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if (!ssl3_check_cert_and_algorithm(s))
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{
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ret= -1;
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goto end;
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}
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break;
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case SSL3_ST_CR_CERT_REQ_A:
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case SSL3_ST_CR_CERT_REQ_B:
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ret=ssl3_get_certificate_request(s);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CR_SRVR_DONE_A;
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s->init_num=0;
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break;
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case SSL3_ST_CR_SRVR_DONE_A:
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case SSL3_ST_CR_SRVR_DONE_B:
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ret=ssl3_get_server_done(s);
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if (ret <= 0) goto end;
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if (s->s3->tmp.cert_req)
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s->state=SSL3_ST_CW_CERT_A;
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else
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s->state=SSL3_ST_CW_KEY_EXCH_A;
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s->init_num=0;
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break;
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case SSL3_ST_CW_CERT_A:
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case SSL3_ST_CW_CERT_B:
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case SSL3_ST_CW_CERT_C:
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case SSL3_ST_CW_CERT_D:
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ret=ssl3_send_client_certificate(s);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CW_KEY_EXCH_A;
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s->init_num=0;
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break;
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case SSL3_ST_CW_KEY_EXCH_A:
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case SSL3_ST_CW_KEY_EXCH_B:
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ret=ssl3_send_client_key_exchange(s);
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if (ret <= 0) goto end;
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l=s->s3->tmp.new_cipher->algorithms;
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/* EAY EAY EAY need to check for DH fix cert
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* sent back */
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/* For TLS, cert_req is set to 2, so a cert chain
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* of nothing is sent, but no verify packet is sent */
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if (s->s3->tmp.cert_req == 1)
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{
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s->state=SSL3_ST_CW_CERT_VRFY_A;
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}
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else
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{
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s->state=SSL3_ST_CW_CHANGE_A;
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s->s3->change_cipher_spec=0;
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}
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s->init_num=0;
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break;
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case SSL3_ST_CW_CERT_VRFY_A:
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case SSL3_ST_CW_CERT_VRFY_B:
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ret=ssl3_send_client_verify(s);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CW_CHANGE_A;
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s->init_num=0;
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s->s3->change_cipher_spec=0;
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break;
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case SSL3_ST_CW_CHANGE_A:
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case SSL3_ST_CW_CHANGE_B:
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ret=ssl3_send_change_cipher_spec(s,
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SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CW_FINISHED_A;
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s->init_num=0;
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s->session->cipher=s->s3->tmp.new_cipher;
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if (s->s3->tmp.new_compression == NULL)
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s->session->compress_meth=0;
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else
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s->session->compress_meth=
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s->s3->tmp.new_compression->id;
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if (!s->method->ssl3_enc->setup_key_block(s))
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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 (!s->method->ssl3_enc->change_cipher_state(s,
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SSL3_CHANGE_CIPHER_CLIENT_WRITE))
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{
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ret= -1;
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goto end;
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}
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break;
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case SSL3_ST_CW_FINISHED_A:
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case SSL3_ST_CW_FINISHED_B:
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ret=ssl3_send_finished(s,
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SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
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s->method->ssl3_enc->client_finished_label,
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s->method->ssl3_enc->client_finished_label_len);
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if (ret <= 0) goto end;
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s->state=SSL3_ST_CW_FLUSH;
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/* clear flags */
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s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
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if (s->hit)
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{
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s->s3->tmp.next_state=SSL_ST_OK;
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if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
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{
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s->state=SSL_ST_OK;
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s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
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s->s3->delay_buf_pop_ret=0;
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}
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}
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else
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{
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s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
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}
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s->init_num=0;
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break;
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case SSL3_ST_CR_FINISHED_A:
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case SSL3_ST_CR_FINISHED_B:
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ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
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SSL3_ST_CR_FINISHED_B);
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if (ret <= 0) goto end;
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if (s->hit)
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s->state=SSL3_ST_CW_CHANGE_A;
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else
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s->state=SSL_ST_OK;
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s->init_num=0;
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break;
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case SSL3_ST_CW_FLUSH:
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/* number of bytes to be flushed */
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num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
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if (num1 > 0)
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{
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s->rwstate=SSL_WRITING;
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num1=BIO_flush(s->wbio);
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if (num1 <= 0) { ret= -1; goto end; }
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s->rwstate=SSL_NOTHING;
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}
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s->state=s->s3->tmp.next_state;
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break;
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case SSL_ST_OK:
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/* clean a few things up */
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ssl3_cleanup_key_block(s);
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if (s->init_buf != NULL)
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{
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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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/* If we are not 'joining' the last two packets,
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* remove the buffering now */
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if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
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ssl_free_wbio_buffer(s);
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/* else do it later in ssl3_write */
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s->init_num=0;
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s->new_session=0;
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ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
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if (s->hit) s->ctx->stats.sess_hit++;
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ret=1;
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/* s->server=0; */
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s->handshake_func=ssl3_connect;
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s->ctx->stats.sess_connect_good++;
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if (cb != NULL) 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_SSL3_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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/* did we do anything */
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if (!s->s3->tmp.reuse_message && !skip)
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{
|
|
if (s->debug)
|
|
{
|
|
if ((ret=BIO_flush(s->wbio)) <= 0)
|
|
goto end;
|
|
}
|
|
|
|
if ((cb != NULL) && (s->state != state))
|
|
{
|
|
new_state=s->state;
|
|
s->state=state;
|
|
cb(s,SSL_CB_CONNECT_LOOP,1);
|
|
s->state=new_state;
|
|
}
|
|
}
|
|
skip=0;
|
|
}
|
|
end:
|
|
s->in_handshake--;
|
|
if (cb != NULL)
|
|
cb(s,SSL_CB_CONNECT_EXIT,ret);
|
|
return(ret);
|
|
}
|
|
|
|
|
|
static int ssl3_client_hello(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p,*d;
|
|
int i,j;
|
|
unsigned long Time,l;
|
|
SSL_COMP *comp;
|
|
|
|
buf=(unsigned char *)s->init_buf->data;
|
|
if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
|
|
{
|
|
if ((s->session == NULL) ||
|
|
(s->session->ssl_version != s->version) ||
|
|
(s->session->not_resumable))
|
|
{
|
|
if (!ssl_get_new_session(s,0))
|
|
goto err;
|
|
}
|
|
/* else use the pre-loaded session */
|
|
|
|
p=s->s3->client_random;
|
|
Time=time(NULL); /* Time */
|
|
l2n(Time,p);
|
|
RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
|
|
|
|
/* Do the message type and length last */
|
|
d=p= &(buf[4]);
|
|
|
|
*(p++)=s->version>>8;
|
|
*(p++)=s->version&0xff;
|
|
s->client_version=s->version;
|
|
|
|
/* Random stuff */
|
|
memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
|
|
/* Session ID */
|
|
if (s->new_session)
|
|
i=0;
|
|
else
|
|
i=s->session->session_id_length;
|
|
*(p++)=i;
|
|
if (i != 0)
|
|
{
|
|
if (i > sizeof s->session->session_id)
|
|
{
|
|
SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
memcpy(p,s->session->session_id,i);
|
|
p+=i;
|
|
}
|
|
|
|
/* Ciphers supported */
|
|
i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
|
|
if (i == 0)
|
|
{
|
|
SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
|
|
goto err;
|
|
}
|
|
s2n(i,p);
|
|
p+=i;
|
|
|
|
/* COMPRESSION */
|
|
if (s->ctx->comp_methods == NULL)
|
|
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;
|
|
}
|
|
*(p++)=0; /* Add the NULL method */
|
|
|
|
l=(p-d);
|
|
d=buf;
|
|
*(d++)=SSL3_MT_CLIENT_HELLO;
|
|
l2n3(l,d);
|
|
|
|
s->state=SSL3_ST_CW_CLNT_HELLO_B;
|
|
/* number of bytes to write */
|
|
s->init_num=p-buf;
|
|
s->init_off=0;
|
|
}
|
|
|
|
/* SSL3_ST_CW_CLNT_HELLO_B */
|
|
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
|
|
err:
|
|
return(-1);
|
|
}
|
|
|
|
static int ssl3_get_server_hello(SSL *s)
|
|
{
|
|
STACK_OF(SSL_CIPHER) *sk;
|
|
SSL_CIPHER *c;
|
|
unsigned char *p,*d;
|
|
int i,al,ok;
|
|
unsigned int j;
|
|
long n;
|
|
SSL_COMP *comp;
|
|
|
|
n=ssl3_get_message(s,
|
|
SSL3_ST_CR_SRVR_HELLO_A,
|
|
SSL3_ST_CR_SRVR_HELLO_B,
|
|
SSL3_MT_SERVER_HELLO,
|
|
300, /* ?? */
|
|
&ok);
|
|
|
|
if (!ok) return((int)n);
|
|
d=p=(unsigned char *)s->init_msg;
|
|
|
|
if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
|
|
s->version=(s->version&0xff00)|p[1];
|
|
al=SSL_AD_PROTOCOL_VERSION;
|
|
goto f_err;
|
|
}
|
|
p+=2;
|
|
|
|
/* load the server hello data */
|
|
/* load the server random */
|
|
memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
|
|
p+=SSL3_RANDOM_SIZE;
|
|
|
|
/* get the session-id */
|
|
j= *(p++);
|
|
|
|
if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
|
|
{
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
|
|
goto f_err;
|
|
}
|
|
|
|
if (j != 0 && j == s->session->session_id_length
|
|
&& memcmp(p,s->session->session_id,j) == 0)
|
|
{
|
|
if(s->sid_ctx_length != s->session->sid_ctx_length
|
|
|| memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
|
|
{
|
|
/* actually a client application bug */
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
|
|
goto f_err;
|
|
}
|
|
s->hit=1;
|
|
}
|
|
else /* a miss or crap from the other end */
|
|
{
|
|
/* If we were trying for session-id reuse, make a new
|
|
* SSL_SESSION so we don't stuff up other people */
|
|
s->hit=0;
|
|
if (s->session->session_id_length > 0)
|
|
{
|
|
if (!ssl_get_new_session(s,0))
|
|
{
|
|
al=SSL_AD_INTERNAL_ERROR;
|
|
goto f_err;
|
|
}
|
|
}
|
|
s->session->session_id_length=j;
|
|
memcpy(s->session->session_id,p,j); /* j could be 0 */
|
|
}
|
|
p+=j;
|
|
c=ssl_get_cipher_by_char(s,p);
|
|
if (c == NULL)
|
|
{
|
|
/* unknown cipher */
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
|
|
goto f_err;
|
|
}
|
|
p+=ssl_put_cipher_by_char(s,NULL,NULL);
|
|
|
|
sk=ssl_get_ciphers_by_id(s);
|
|
i=sk_SSL_CIPHER_find(sk,c);
|
|
if (i < 0)
|
|
{
|
|
/* we did not say we would use this cipher */
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
|
|
goto f_err;
|
|
}
|
|
|
|
/* Depending on the session caching (internal/external), the cipher
|
|
and/or cipher_id values may not be set. Make sure that
|
|
cipher_id is set and use it for comparison. */
|
|
if (s->session->cipher)
|
|
s->session->cipher_id = s->session->cipher->id;
|
|
if (s->hit && (s->session->cipher_id != c->id))
|
|
{
|
|
if (!(s->options &
|
|
SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
|
|
{
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
|
|
goto f_err;
|
|
}
|
|
}
|
|
s->s3->tmp.new_cipher=c;
|
|
|
|
/* lets get the compression algorithm */
|
|
/* COMPRESSION */
|
|
j= *(p++);
|
|
if (j == 0)
|
|
comp=NULL;
|
|
else
|
|
comp=ssl3_comp_find(s->ctx->comp_methods,j);
|
|
|
|
if ((j != 0) && (comp == NULL))
|
|
{
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
|
goto f_err;
|
|
}
|
|
else
|
|
{
|
|
s->s3->tmp.new_compression=comp;
|
|
}
|
|
|
|
if (p != (d+n))
|
|
{
|
|
/* wrong packet length */
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
|
|
goto err;
|
|
}
|
|
|
|
return(1);
|
|
f_err:
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,al);
|
|
err:
|
|
return(-1);
|
|
}
|
|
|
|
static int ssl3_get_server_certificate(SSL *s)
|
|
{
|
|
int al,i,ok,ret= -1;
|
|
unsigned long n,nc,llen,l;
|
|
X509 *x=NULL;
|
|
unsigned char *p,*d,*q;
|
|
STACK_OF(X509) *sk=NULL;
|
|
SESS_CERT *sc;
|
|
EVP_PKEY *pkey=NULL;
|
|
int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
|
|
|
|
n=ssl3_get_message(s,
|
|
SSL3_ST_CR_CERT_A,
|
|
SSL3_ST_CR_CERT_B,
|
|
-1,
|
|
s->max_cert_list,
|
|
&ok);
|
|
|
|
if (!ok) return((int)n);
|
|
|
|
if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
|
|
{
|
|
s->s3->tmp.reuse_message=1;
|
|
return(1);
|
|
}
|
|
|
|
if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
|
|
{
|
|
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
|
|
goto f_err;
|
|
}
|
|
d=p=(unsigned char *)s->init_msg;
|
|
|
|
if ((sk=sk_X509_new_null()) == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
n2l3(p,llen);
|
|
if (llen+3 != n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
|
|
goto f_err;
|
|
}
|
|
for (nc=0; nc<llen; )
|
|
{
|
|
n2l3(p,l);
|
|
if ((l+nc+3) > llen)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
|
|
goto f_err;
|
|
}
|
|
|
|
q=p;
|
|
x=d2i_X509(NULL,&q,l);
|
|
if (x == NULL)
|
|
{
|
|
al=SSL_AD_BAD_CERTIFICATE;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
|
|
goto f_err;
|
|
}
|
|
if (q != (p+l))
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
|
|
goto f_err;
|
|
}
|
|
if (!sk_X509_push(sk,x))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
x=NULL;
|
|
nc+=l+3;
|
|
p=q;
|
|
}
|
|
|
|
i=ssl_verify_cert_chain(s,sk);
|
|
if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
|
|
#ifndef OPENSSL_NO_KRB5
|
|
&& (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
|
|
!= (SSL_aKRB5|SSL_kKRB5)
|
|
#endif /* OPENSSL_NO_KRB5 */
|
|
)
|
|
{
|
|
al=ssl_verify_alarm_type(s->verify_result);
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
|
|
goto f_err;
|
|
}
|
|
ERR_clear_error(); /* but we keep s->verify_result */
|
|
|
|
sc=ssl_sess_cert_new();
|
|
if (sc == NULL) goto err;
|
|
|
|
if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
|
|
s->session->sess_cert=sc;
|
|
|
|
sc->cert_chain=sk;
|
|
/* Inconsistency alert: cert_chain does include the peer's
|
|
* certificate, which we don't include in s3_srvr.c */
|
|
x=sk_X509_value(sk,0);
|
|
sk=NULL;
|
|
/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
|
|
|
|
pkey=X509_get_pubkey(x);
|
|
|
|
/* VRS: allow null cert if auth == KRB5 */
|
|
need_cert = ((s->s3->tmp.new_cipher->algorithms
|
|
& (SSL_MKEY_MASK|SSL_AUTH_MASK))
|
|
== (SSL_aKRB5|SSL_kKRB5))? 0: 1;
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf("pkey,x = %p, %p\n", pkey,x);
|
|
printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
|
|
printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
|
|
s->s3->tmp.new_cipher->algorithms, need_cert);
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
|
|
{
|
|
x=NULL;
|
|
al=SSL3_AL_FATAL;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
|
|
SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
|
|
goto f_err;
|
|
}
|
|
|
|
i=ssl_cert_type(x,pkey);
|
|
if (need_cert && i < 0)
|
|
{
|
|
x=NULL;
|
|
al=SSL3_AL_FATAL;
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
|
|
SSL_R_UNKNOWN_CERTIFICATE_TYPE);
|
|
goto f_err;
|
|
}
|
|
|
|
if (need_cert)
|
|
{
|
|
sc->peer_cert_type=i;
|
|
CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
|
|
/* Why would the following ever happen?
|
|
* We just created sc a couple of lines ago. */
|
|
if (sc->peer_pkeys[i].x509 != NULL)
|
|
X509_free(sc->peer_pkeys[i].x509);
|
|
sc->peer_pkeys[i].x509=x;
|
|
sc->peer_key= &(sc->peer_pkeys[i]);
|
|
|
|
if (s->session->peer != NULL)
|
|
X509_free(s->session->peer);
|
|
CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
|
|
s->session->peer=x;
|
|
}
|
|
else
|
|
{
|
|
sc->peer_cert_type=i;
|
|
sc->peer_key= NULL;
|
|
|
|
if (s->session->peer != NULL)
|
|
X509_free(s->session->peer);
|
|
s->session->peer=NULL;
|
|
}
|
|
s->session->verify_result = s->verify_result;
|
|
|
|
x=NULL;
|
|
ret=1;
|
|
|
|
if (0)
|
|
{
|
|
f_err:
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,al);
|
|
}
|
|
err:
|
|
EVP_PKEY_free(pkey);
|
|
X509_free(x);
|
|
sk_X509_pop_free(sk,X509_free);
|
|
return(ret);
|
|
}
|
|
|
|
static int ssl3_get_key_exchange(SSL *s)
|
|
{
|
|
#ifndef OPENSSL_NO_RSA
|
|
unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
|
|
#endif
|
|
EVP_MD_CTX md_ctx;
|
|
unsigned char *param,*p;
|
|
int al,i,j,param_len,ok;
|
|
long n,alg;
|
|
EVP_PKEY *pkey=NULL;
|
|
#ifndef OPENSSL_NO_RSA
|
|
RSA *rsa=NULL;
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
DH *dh=NULL;
|
|
#endif
|
|
|
|
/* use same message size as in ssl3_get_certificate_request()
|
|
* as ServerKeyExchange message may be skipped */
|
|
n=ssl3_get_message(s,
|
|
SSL3_ST_CR_KEY_EXCH_A,
|
|
SSL3_ST_CR_KEY_EXCH_B,
|
|
-1,
|
|
s->max_cert_list,
|
|
&ok);
|
|
|
|
if (!ok) return((int)n);
|
|
|
|
if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
|
|
{
|
|
s->s3->tmp.reuse_message=1;
|
|
return(1);
|
|
}
|
|
|
|
param=p=(unsigned char *)s->init_msg;
|
|
|
|
if (s->session->sess_cert != NULL)
|
|
{
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (s->session->sess_cert->peer_rsa_tmp != NULL)
|
|
{
|
|
RSA_free(s->session->sess_cert->peer_rsa_tmp);
|
|
s->session->sess_cert->peer_rsa_tmp=NULL;
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
if (s->session->sess_cert->peer_dh_tmp)
|
|
{
|
|
DH_free(s->session->sess_cert->peer_dh_tmp);
|
|
s->session->sess_cert->peer_dh_tmp=NULL;
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
s->session->sess_cert=ssl_sess_cert_new();
|
|
}
|
|
|
|
param_len=0;
|
|
alg=s->s3->tmp.new_cipher->algorithms;
|
|
EVP_MD_CTX_init(&md_ctx);
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (alg & SSL_kRSA)
|
|
{
|
|
if ((rsa=RSA_new()) == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
n2s(p,i);
|
|
param_len=i+2;
|
|
if (param_len > n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
|
|
goto f_err;
|
|
}
|
|
if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
p+=i;
|
|
|
|
n2s(p,i);
|
|
param_len+=i+2;
|
|
if (param_len > n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
|
|
goto f_err;
|
|
}
|
|
if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
p+=i;
|
|
n-=param_len;
|
|
|
|
/* this should be because we are using an export cipher */
|
|
if (alg & SSL_aRSA)
|
|
pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
|
|
else
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
s->session->sess_cert->peer_rsa_tmp=rsa;
|
|
rsa=NULL;
|
|
}
|
|
#else /* OPENSSL_NO_RSA */
|
|
if (0)
|
|
;
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
else if (alg & SSL_kEDH)
|
|
{
|
|
if ((dh=DH_new()) == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
n2s(p,i);
|
|
param_len=i+2;
|
|
if (param_len > n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
|
|
goto f_err;
|
|
}
|
|
if (!(dh->p=BN_bin2bn(p,i,NULL)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
p+=i;
|
|
|
|
n2s(p,i);
|
|
param_len+=i+2;
|
|
if (param_len > n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
|
|
goto f_err;
|
|
}
|
|
if (!(dh->g=BN_bin2bn(p,i,NULL)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
p+=i;
|
|
|
|
n2s(p,i);
|
|
param_len+=i+2;
|
|
if (param_len > n)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
|
|
goto f_err;
|
|
}
|
|
if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
|
|
goto err;
|
|
}
|
|
p+=i;
|
|
n-=param_len;
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (alg & SSL_aRSA)
|
|
pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
|
|
#else
|
|
if (0)
|
|
;
|
|
#endif
|
|
#ifndef OPENSSL_NO_DSA
|
|
else if (alg & SSL_aDSS)
|
|
pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
|
|
#endif
|
|
/* else anonymous DH, so no certificate or pkey. */
|
|
|
|
s->session->sess_cert->peer_dh_tmp=dh;
|
|
dh=NULL;
|
|
}
|
|
else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
|
|
{
|
|
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
|
|
goto f_err;
|
|
}
|
|
#endif /* !OPENSSL_NO_DH */
|
|
if (alg & SSL_aFZA)
|
|
{
|
|
al=SSL_AD_HANDSHAKE_FAILURE;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
|
|
goto f_err;
|
|
}
|
|
|
|
|
|
/* p points to the next byte, there are 'n' bytes left */
|
|
|
|
|
|
/* if it was signed, check the signature */
|
|
if (pkey != NULL)
|
|
{
|
|
n2s(p,i);
|
|
n-=2;
|
|
j=EVP_PKEY_size(pkey);
|
|
|
|
if ((i != n) || (n > j) || (n <= 0))
|
|
{
|
|
/* wrong packet length */
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
|
|
goto f_err;
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (pkey->type == EVP_PKEY_RSA)
|
|
{
|
|
int num;
|
|
|
|
j=0;
|
|
q=md_buf;
|
|
for (num=2; num > 0; num--)
|
|
{
|
|
EVP_DigestInit_ex(&md_ctx,(num == 2)
|
|
?s->ctx->md5:s->ctx->sha1, NULL);
|
|
EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
|
|
EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
|
|
EVP_DigestUpdate(&md_ctx,param,param_len);
|
|
EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
|
|
q+=i;
|
|
j+=i;
|
|
}
|
|
i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
|
|
pkey->pkey.rsa);
|
|
if (i < 0)
|
|
{
|
|
al=SSL_AD_DECRYPT_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
|
|
goto f_err;
|
|
}
|
|
if (i == 0)
|
|
{
|
|
/* bad signature */
|
|
al=SSL_AD_DECRYPT_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
|
|
goto f_err;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
#ifndef OPENSSL_NO_DSA
|
|
if (pkey->type == EVP_PKEY_DSA)
|
|
{
|
|
/* lets do DSS */
|
|
EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
|
|
EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
|
|
EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
|
|
EVP_VerifyUpdate(&md_ctx,param,param_len);
|
|
if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
|
|
{
|
|
/* bad signature */
|
|
al=SSL_AD_DECRYPT_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
|
|
goto f_err;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* still data left over */
|
|
if (!(alg & SSL_aNULL))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
if (n != 0)
|
|
{
|
|
al=SSL_AD_DECODE_ERROR;
|
|
SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
|
|
goto f_err;
|
|
}
|
|
}
|
|
EVP_PKEY_free(pkey);
|
|
EVP_MD_CTX_cleanup(&md_ctx);
|
|
return(1);
|
|
f_err:
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,al);
|
|
err:
|
|
EVP_PKEY_free(pkey);
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (rsa != NULL)
|
|
RSA_free(rsa);
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
if (dh != NULL)
|
|
DH_free(dh);
|
|
#endif
|
|
EVP_MD_CTX_cleanup(&md_ctx);
|
|
return(-1);
|
|
}
|
|
|
|
static int ssl3_get_certificate_request(SSL *s)
|
|
{
|
|
int ok,ret=0;
|
|
unsigned long n,nc,l;
|
|
unsigned int llen,ctype_num,i;
|
|
X509_NAME *xn=NULL;
|
|
unsigned char *p,*d,*q;
|
|
STACK_OF(X509_NAME) *ca_sk=NULL;
|
|
|
|
n=ssl3_get_message(s,
|
|
SSL3_ST_CR_CERT_REQ_A,
|
|
SSL3_ST_CR_CERT_REQ_B,
|
|
-1,
|
|
s->max_cert_list,
|
|
&ok);
|
|
|
|
if (!ok) return((int)n);
|
|
|
|
s->s3->tmp.cert_req=0;
|
|
|
|
if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
|
|
{
|
|
s->s3->tmp.reuse_message=1;
|
|
return(1);
|
|
}
|
|
|
|
if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
|
|
goto err;
|
|
}
|
|
|
|
/* TLS does not like anon-DH with client cert */
|
|
if (s->version > SSL3_VERSION)
|
|
{
|
|
l=s->s3->tmp.new_cipher->algorithms;
|
|
if (l & SSL_aNULL)
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
d=p=(unsigned char *)s->init_msg;
|
|
|
|
if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* get the certificate types */
|
|
ctype_num= *(p++);
|
|
if (ctype_num > SSL3_CT_NUMBER)
|
|
ctype_num=SSL3_CT_NUMBER;
|
|
for (i=0; i<ctype_num; i++)
|
|
s->s3->tmp.ctype[i]= p[i];
|
|
p+=ctype_num;
|
|
|
|
/* get the CA RDNs */
|
|
n2s(p,llen);
|
|
#if 0
|
|
{
|
|
FILE *out;
|
|
out=fopen("/tmp/vsign.der","w");
|
|
fwrite(p,1,llen,out);
|
|
fclose(out);
|
|
}
|
|
#endif
|
|
|
|
if ((llen+ctype_num+2+1) != n)
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
for (nc=0; nc<llen; )
|
|
{
|
|
n2s(p,l);
|
|
if ((l+nc+2) > llen)
|
|
{
|
|
if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
|
|
goto cont; /* netscape bugs */
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
|
|
goto err;
|
|
}
|
|
|
|
q=p;
|
|
|
|
if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
|
|
{
|
|
/* If netscape tolerance is on, ignore errors */
|
|
if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
|
|
goto cont;
|
|
else
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (q != (p+l))
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
if (!sk_X509_NAME_push(ca_sk,xn))
|
|
{
|
|
SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
p+=l;
|
|
nc+=l+2;
|
|
}
|
|
|
|
if (0)
|
|
{
|
|
cont:
|
|
ERR_clear_error();
|
|
}
|
|
|
|
/* we should setup a certificate to return.... */
|
|
s->s3->tmp.cert_req=1;
|
|
s->s3->tmp.ctype_num=ctype_num;
|
|
if (s->s3->tmp.ca_names != NULL)
|
|
sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
|
|
s->s3->tmp.ca_names=ca_sk;
|
|
ca_sk=NULL;
|
|
|
|
ret=1;
|
|
err:
|
|
if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
|
|
return(ret);
|
|
}
|
|
|
|
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
|
|
{
|
|
return(X509_NAME_cmp(*a,*b));
|
|
}
|
|
|
|
static int ssl3_get_server_done(SSL *s)
|
|
{
|
|
int ok,ret=0;
|
|
long n;
|
|
|
|
n=ssl3_get_message(s,
|
|
SSL3_ST_CR_SRVR_DONE_A,
|
|
SSL3_ST_CR_SRVR_DONE_B,
|
|
SSL3_MT_SERVER_DONE,
|
|
30, /* should be very small, like 0 :-) */
|
|
&ok);
|
|
|
|
if (!ok) return((int)n);
|
|
if (n > 0)
|
|
{
|
|
/* should contain no data */
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
|
|
SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
|
|
return -1;
|
|
}
|
|
ret=1;
|
|
return(ret);
|
|
}
|
|
|
|
static int ssl3_send_client_key_exchange(SSL *s)
|
|
{
|
|
unsigned char *p,*d;
|
|
int n;
|
|
unsigned long l;
|
|
#ifndef OPENSSL_NO_RSA
|
|
unsigned char *q;
|
|
EVP_PKEY *pkey=NULL;
|
|
#endif
|
|
#ifndef OPENSSL_NO_KRB5
|
|
KSSL_ERR kssl_err;
|
|
#endif /* OPENSSL_NO_KRB5 */
|
|
|
|
if (s->state == SSL3_ST_CW_KEY_EXCH_A)
|
|
{
|
|
d=(unsigned char *)s->init_buf->data;
|
|
p= &(d[4]);
|
|
|
|
l=s->s3->tmp.new_cipher->algorithms;
|
|
|
|
/* Fool emacs indentation */
|
|
if (0) {}
|
|
#ifndef OPENSSL_NO_RSA
|
|
else if (l & SSL_kRSA)
|
|
{
|
|
RSA *rsa;
|
|
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
|
|
|
|
if (s->session->sess_cert->peer_rsa_tmp != NULL)
|
|
rsa=s->session->sess_cert->peer_rsa_tmp;
|
|
else
|
|
{
|
|
pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
|
|
if ((pkey == NULL) ||
|
|
(pkey->type != EVP_PKEY_RSA) ||
|
|
(pkey->pkey.rsa == NULL))
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
rsa=pkey->pkey.rsa;
|
|
EVP_PKEY_free(pkey);
|
|
}
|
|
|
|
tmp_buf[0]=s->client_version>>8;
|
|
tmp_buf[1]=s->client_version&0xff;
|
|
if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
|
|
goto err;
|
|
|
|
s->session->master_key_length=sizeof tmp_buf;
|
|
|
|
q=p;
|
|
/* Fix buf for TLS and beyond */
|
|
if (s->version > SSL3_VERSION)
|
|
p+=2;
|
|
n=RSA_public_encrypt(sizeof tmp_buf,
|
|
tmp_buf,p,rsa,RSA_PKCS1_PADDING);
|
|
#ifdef PKCS1_CHECK
|
|
if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
|
|
if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
|
|
#endif
|
|
if (n <= 0)
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
|
|
goto err;
|
|
}
|
|
|
|
/* Fix buf for TLS and beyond */
|
|
if (s->version > SSL3_VERSION)
|
|
{
|
|
s2n(n,q);
|
|
n+=2;
|
|
}
|
|
|
|
s->session->master_key_length=
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->session->master_key,
|
|
tmp_buf,sizeof tmp_buf);
|
|
OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_KRB5
|
|
else if (l & SSL_kKRB5)
|
|
{
|
|
krb5_error_code krb5rc;
|
|
KSSL_CTX *kssl_ctx = s->kssl_ctx;
|
|
/* krb5_data krb5_ap_req; */
|
|
krb5_data *enc_ticket;
|
|
krb5_data authenticator, *authp = NULL;
|
|
EVP_CIPHER_CTX ciph_ctx;
|
|
EVP_CIPHER *enc = NULL;
|
|
unsigned char iv[EVP_MAX_IV_LENGTH];
|
|
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
|
|
unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
|
|
+ EVP_MAX_IV_LENGTH];
|
|
int padl, outl = sizeof(epms);
|
|
|
|
EVP_CIPHER_CTX_init(&ciph_ctx);
|
|
|
|
#ifdef KSSL_DEBUG
|
|
printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
|
|
l, SSL_kKRB5);
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
authp = NULL;
|
|
#ifdef KRB5SENDAUTH
|
|
if (KRB5SENDAUTH) authp = &authenticator;
|
|
#endif /* KRB5SENDAUTH */
|
|
|
|
krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
|
|
&kssl_err);
|
|
enc = kssl_map_enc(kssl_ctx->enctype);
|
|
if (enc == NULL)
|
|
goto err;
|
|
#ifdef KSSL_DEBUG
|
|
{
|
|
printf("kssl_cget_tkt rtn %d\n", krb5rc);
|
|
if (krb5rc && kssl_err.text)
|
|
printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
|
|
}
|
|
#endif /* KSSL_DEBUG */
|
|
|
|
if (krb5rc)
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,
|
|
SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
|
|
kssl_err.reason);
|
|
goto err;
|
|
}
|
|
|
|
/* 20010406 VRS - Earlier versions used KRB5 AP_REQ
|
|
** in place of RFC 2712 KerberosWrapper, as in:
|
|
**
|
|
** Send ticket (copy to *p, set n = length)
|
|
** n = krb5_ap_req.length;
|
|
** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
|
|
** if (krb5_ap_req.data)
|
|
** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
|
|
**
|
|
** Now using real RFC 2712 KerberosWrapper
|
|
** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
|
|
** Note: 2712 "opaque" types are here replaced
|
|
** with a 2-byte length followed by the value.
|
|
** Example:
|
|
** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
|
|
** Where "xx xx" = length bytes. Shown here with
|
|
** optional authenticator omitted.
|
|
*/
|
|
|
|
/* KerberosWrapper.Ticket */
|
|
s2n(enc_ticket->length,p);
|
|
memcpy(p, enc_ticket->data, enc_ticket->length);
|
|
p+= enc_ticket->length;
|
|
n = enc_ticket->length + 2;
|
|
|
|
/* KerberosWrapper.Authenticator */
|
|
if (authp && authp->length)
|
|
{
|
|
s2n(authp->length,p);
|
|
memcpy(p, authp->data, authp->length);
|
|
p+= authp->length;
|
|
n+= authp->length + 2;
|
|
|
|
free(authp->data);
|
|
authp->data = NULL;
|
|
authp->length = 0;
|
|
}
|
|
else
|
|
{
|
|
s2n(0,p);/* null authenticator length */
|
|
n+=2;
|
|
}
|
|
|
|
if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
|
|
goto err;
|
|
|
|
/* 20010420 VRS. Tried it this way; failed.
|
|
** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
|
|
** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
|
|
** kssl_ctx->length);
|
|
** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
|
|
*/
|
|
|
|
memset(iv, 0, sizeof iv); /* per RFC 1510 */
|
|
EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
|
|
kssl_ctx->key,iv);
|
|
EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
|
|
sizeof tmp_buf);
|
|
EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
|
|
outl += padl;
|
|
if (outl > sizeof epms)
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
EVP_CIPHER_CTX_cleanup(&ciph_ctx);
|
|
|
|
/* KerberosWrapper.EncryptedPreMasterSecret */
|
|
s2n(outl,p);
|
|
memcpy(p, epms, outl);
|
|
p+=outl;
|
|
n+=outl + 2;
|
|
|
|
s->session->master_key_length=
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->session->master_key,
|
|
tmp_buf, sizeof tmp_buf);
|
|
|
|
OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
|
|
OPENSSL_cleanse(epms, outl);
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
|
|
{
|
|
DH *dh_srvr,*dh_clnt;
|
|
|
|
if (s->session->sess_cert->peer_dh_tmp != NULL)
|
|
dh_srvr=s->session->sess_cert->peer_dh_tmp;
|
|
else
|
|
{
|
|
/* we get them from the cert */
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
|
|
goto err;
|
|
}
|
|
|
|
/* generate a new random key */
|
|
if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
if (!DH_generate_key(dh_clnt))
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* use the 'p' output buffer for the DH key, but
|
|
* make sure to clear it out afterwards */
|
|
|
|
n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
|
|
|
|
if (n <= 0)
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* generate master key from the result */
|
|
s->session->master_key_length=
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->session->master_key,p,n);
|
|
/* clean up */
|
|
memset(p,0,n);
|
|
|
|
/* send off the data */
|
|
n=BN_num_bytes(dh_clnt->pub_key);
|
|
s2n(n,p);
|
|
BN_bn2bin(dh_clnt->pub_key,p);
|
|
n+=2;
|
|
|
|
DH_free(dh_clnt);
|
|
|
|
/* perhaps clean things up a bit EAY EAY EAY EAY*/
|
|
}
|
|
#endif
|
|
else
|
|
{
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
|
|
l2n3(n,d);
|
|
|
|
s->state=SSL3_ST_CW_KEY_EXCH_B;
|
|
/* number of bytes to write */
|
|
s->init_num=n+4;
|
|
s->init_off=0;
|
|
}
|
|
|
|
/* SSL3_ST_CW_KEY_EXCH_B */
|
|
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
|
|
err:
|
|
return(-1);
|
|
}
|
|
|
|
static int ssl3_send_client_verify(SSL *s)
|
|
{
|
|
unsigned char *p,*d;
|
|
unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
|
|
EVP_PKEY *pkey;
|
|
#ifndef OPENSSL_NO_RSA
|
|
unsigned u=0;
|
|
#endif
|
|
unsigned long n;
|
|
#ifndef OPENSSL_NO_DSA
|
|
int j;
|
|
#endif
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_VRFY_A)
|
|
{
|
|
d=(unsigned char *)s->init_buf->data;
|
|
p= &(d[4]);
|
|
pkey=s->cert->key->privatekey;
|
|
|
|
s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
|
|
&(data[MD5_DIGEST_LENGTH]));
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (pkey->type == EVP_PKEY_RSA)
|
|
{
|
|
s->method->ssl3_enc->cert_verify_mac(s,
|
|
&(s->s3->finish_dgst1),&(data[0]));
|
|
if (RSA_sign(NID_md5_sha1, data,
|
|
MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
|
|
&(p[2]), &u, pkey->pkey.rsa) <= 0 )
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
|
|
goto err;
|
|
}
|
|
s2n(u,p);
|
|
n=u+2;
|
|
}
|
|
else
|
|
#endif
|
|
#ifndef OPENSSL_NO_DSA
|
|
if (pkey->type == EVP_PKEY_DSA)
|
|
{
|
|
if (!DSA_sign(pkey->save_type,
|
|
&(data[MD5_DIGEST_LENGTH]),
|
|
SHA_DIGEST_LENGTH,&(p[2]),
|
|
(unsigned int *)&j,pkey->pkey.dsa))
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
|
|
goto err;
|
|
}
|
|
s2n(j,p);
|
|
n=j+2;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
|
|
l2n3(n,d);
|
|
|
|
s->init_num=(int)n+4;
|
|
s->init_off=0;
|
|
}
|
|
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
|
|
err:
|
|
return(-1);
|
|
}
|
|
|
|
static int ssl3_send_client_certificate(SSL *s)
|
|
{
|
|
X509 *x509=NULL;
|
|
EVP_PKEY *pkey=NULL;
|
|
int i;
|
|
unsigned long l;
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_A)
|
|
{
|
|
if ((s->cert == NULL) ||
|
|
(s->cert->key->x509 == NULL) ||
|
|
(s->cert->key->privatekey == NULL))
|
|
s->state=SSL3_ST_CW_CERT_B;
|
|
else
|
|
s->state=SSL3_ST_CW_CERT_C;
|
|
}
|
|
|
|
/* We need to get a client cert */
|
|
if (s->state == SSL3_ST_CW_CERT_B)
|
|
{
|
|
/* If we get an error, we need to
|
|
* ssl->rwstate=SSL_X509_LOOKUP; return(-1);
|
|
* We then get retied later */
|
|
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=SSL3_ST_CW_CERT_B;
|
|
if ( !SSL_use_certificate(s,x509) ||
|
|
!SSL_use_PrivateKey(s,pkey))
|
|
i=0;
|
|
}
|
|
else if (i == 1)
|
|
{
|
|
i=0;
|
|
SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
|
|
}
|
|
|
|
if (x509 != NULL) X509_free(x509);
|
|
if (pkey != NULL) EVP_PKEY_free(pkey);
|
|
if (i == 0)
|
|
{
|
|
if (s->version == SSL3_VERSION)
|
|
{
|
|
s->s3->tmp.cert_req=0;
|
|
ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
|
|
return(1);
|
|
}
|
|
else
|
|
{
|
|
s->s3->tmp.cert_req=2;
|
|
}
|
|
}
|
|
|
|
/* Ok, we have a cert */
|
|
s->state=SSL3_ST_CW_CERT_C;
|
|
}
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_C)
|
|
{
|
|
s->state=SSL3_ST_CW_CERT_D;
|
|
l=ssl3_output_cert_chain(s,
|
|
(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
|
|
s->init_num=(int)l;
|
|
s->init_off=0;
|
|
}
|
|
/* SSL3_ST_CW_CERT_D */
|
|
return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
|
|
}
|
|
|
|
#define has_bits(i,m) (((i)&(m)) == (m))
|
|
|
|
static int ssl3_check_cert_and_algorithm(SSL *s)
|
|
{
|
|
int i,idx;
|
|
long algs;
|
|
EVP_PKEY *pkey=NULL;
|
|
SESS_CERT *sc;
|
|
#ifndef OPENSSL_NO_RSA
|
|
RSA *rsa;
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
DH *dh;
|
|
#endif
|
|
|
|
sc=s->session->sess_cert;
|
|
|
|
if (sc == NULL)
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
algs=s->s3->tmp.new_cipher->algorithms;
|
|
|
|
/* we don't have a certificate */
|
|
if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
|
|
return(1);
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
rsa=s->session->sess_cert->peer_rsa_tmp;
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
dh=s->session->sess_cert->peer_dh_tmp;
|
|
#endif
|
|
|
|
/* This is the passed certificate */
|
|
|
|
idx=sc->peer_cert_type;
|
|
pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
|
|
i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
|
|
EVP_PKEY_free(pkey);
|
|
|
|
|
|
/* Check that we have a certificate if we require one */
|
|
if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
|
|
goto f_err;
|
|
}
|
|
#ifndef OPENSSL_NO_DSA
|
|
else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
|
|
goto f_err;
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_RSA
|
|
if ((algs & SSL_kRSA) &&
|
|
!(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
|
|
goto f_err;
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
if ((algs & SSL_kEDH) &&
|
|
!(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
|
|
goto f_err;
|
|
}
|
|
else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
|
|
goto f_err;
|
|
}
|
|
#ifndef OPENSSL_NO_DSA
|
|
else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
|
|
goto f_err;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
|
|
{
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (algs & SSL_kRSA)
|
|
{
|
|
if (rsa == NULL
|
|
|| RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
|
|
goto f_err;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
|
|
{
|
|
if (dh == NULL
|
|
|| DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
|
|
goto f_err;
|
|
}
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
|
|
goto f_err;
|
|
}
|
|
}
|
|
return(1);
|
|
f_err:
|
|
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
|
|
err:
|
|
return(0);
|
|
}
|
|
|