625 lines
17 KiB
C
625 lines
17 KiB
C
/* ssl/s3_both.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 <limits.h>
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#include <string.h>
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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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#include <openssl/x509.h>
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/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
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int ssl3_do_write(SSL *s, int type)
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{
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int ret;
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ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
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s->init_num);
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if (ret < 0) return(-1);
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if (type == SSL3_RT_HANDSHAKE)
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/* should not be done for 'Hello Request's, but in that case
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* we'll ignore the result anyway */
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ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
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if (ret == s->init_num)
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{
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if (s->msg_callback)
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s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
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return(1);
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}
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s->init_off+=ret;
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s->init_num-=ret;
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return(0);
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}
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int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
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{
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unsigned char *p,*d;
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int i;
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unsigned long l;
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if (s->state == a)
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{
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d=(unsigned char *)s->init_buf->data;
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p= &(d[4]);
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i=s->method->ssl3_enc->final_finish_mac(s,
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&(s->s3->finish_dgst1),
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&(s->s3->finish_dgst2),
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sender,slen,s->s3->tmp.finish_md);
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s->s3->tmp.finish_md_len = i;
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memcpy(p, s->s3->tmp.finish_md, i);
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p+=i;
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l=i;
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#ifdef OPENSSL_SYS_WIN16
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/* MSVC 1.5 does not clear the top bytes of the word unless
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* I do this.
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*/
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l&=0xffff;
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#endif
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*(d++)=SSL3_MT_FINISHED;
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l2n3(l,d);
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s->init_num=(int)l+4;
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s->init_off=0;
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s->state=b;
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}
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/* SSL3_ST_SEND_xxxxxx_HELLO_B */
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return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
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}
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int ssl3_get_finished(SSL *s, int a, int b)
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{
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int al,i,ok;
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long n;
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unsigned char *p;
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/* the mac has already been generated when we received the
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* change cipher spec message and is in s->s3->tmp.peer_finish_md
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*/
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n=ssl3_get_message(s,
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a,
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b,
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SSL3_MT_FINISHED,
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64, /* should actually be 36+4 :-) */
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&ok);
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if (!ok) return((int)n);
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/* If this occurs, we have missed a message */
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if (!s->s3->change_cipher_spec)
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
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goto f_err;
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}
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s->s3->change_cipher_spec=0;
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p = (unsigned char *)s->init_msg;
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i = s->s3->tmp.peer_finish_md_len;
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if (i != n)
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{
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al=SSL_AD_DECODE_ERROR;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
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goto f_err;
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}
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if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
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{
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al=SSL_AD_DECRYPT_ERROR;
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SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
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goto f_err;
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}
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return(1);
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f_err:
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ssl3_send_alert(s,SSL3_AL_FATAL,al);
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return(0);
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}
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/* for these 2 messages, we need to
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* ssl->enc_read_ctx re-init
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* ssl->s3->read_sequence zero
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* ssl->s3->read_mac_secret re-init
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* ssl->session->read_sym_enc assign
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* ssl->session->read_compression assign
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* ssl->session->read_hash assign
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*/
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int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
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{
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unsigned char *p;
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if (s->state == a)
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{
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p=(unsigned char *)s->init_buf->data;
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*p=SSL3_MT_CCS;
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s->init_num=1;
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s->init_off=0;
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s->state=b;
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}
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/* SSL3_ST_CW_CHANGE_B */
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return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
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}
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unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
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{
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unsigned char *p;
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int n,i;
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unsigned long l=7;
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BUF_MEM *buf;
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X509_STORE_CTX xs_ctx;
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X509_OBJECT obj;
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/* TLSv1 sends a chain with nothing in it, instead of an alert */
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buf=s->init_buf;
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if (!BUF_MEM_grow_clean(buf,10))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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if (x != NULL)
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{
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if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
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return(0);
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}
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for (;;)
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{
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n=i2d_X509(x,NULL);
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if (!BUF_MEM_grow_clean(buf,(int)(n+l+3)))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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p=(unsigned char *)&(buf->data[l]);
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l2n3(n,p);
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i2d_X509(x,&p);
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l+=n+3;
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if (X509_NAME_cmp(X509_get_subject_name(x),
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X509_get_issuer_name(x)) == 0) break;
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i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
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X509_get_issuer_name(x),&obj);
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if (i <= 0) break;
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x=obj.data.x509;
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/* Count is one too high since the X509_STORE_get uped the
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* ref count */
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X509_free(x);
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}
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X509_STORE_CTX_cleanup(&xs_ctx);
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}
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/* Thawte special :-) */
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if (s->ctx->extra_certs != NULL)
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for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
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{
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x=sk_X509_value(s->ctx->extra_certs,i);
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n=i2d_X509(x,NULL);
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if (!BUF_MEM_grow_clean(buf,(int)(n+l+3)))
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{
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SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
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return(0);
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}
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p=(unsigned char *)&(buf->data[l]);
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l2n3(n,p);
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i2d_X509(x,&p);
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l+=n+3;
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}
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l-=7;
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p=(unsigned char *)&(buf->data[4]);
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l2n3(l,p);
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l+=3;
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p=(unsigned char *)&(buf->data[0]);
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*(p++)=SSL3_MT_CERTIFICATE;
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l2n3(l,p);
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l+=4;
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return(l);
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}
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/* Obtain handshake message of message type 'mt' (any if mt == -1),
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* maximum acceptable body length 'max'.
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* The first four bytes (msg_type and length) are read in state 'st1',
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* the body is read in state 'stn'.
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*/
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long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
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{
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unsigned char *p;
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unsigned long l;
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long n;
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int i,al;
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if (s->s3->tmp.reuse_message)
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{
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s->s3->tmp.reuse_message=0;
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if ((mt >= 0) && (s->s3->tmp.message_type != mt))
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
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goto f_err;
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}
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*ok=1;
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s->init_msg = s->init_buf->data + 4;
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s->init_num = (int)s->s3->tmp.message_size;
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return s->init_num;
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}
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p=(unsigned char *)s->init_buf->data;
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if (s->state == st1) /* s->init_num < 4 */
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{
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int skip_message;
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do
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{
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while (s->init_num < 4)
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{
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i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
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4 - s->init_num, 0);
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if (i <= 0)
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{
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s->rwstate=SSL_READING;
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*ok = 0;
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return i;
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}
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s->init_num+=i;
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}
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skip_message = 0;
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if (!s->server)
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if (p[0] == SSL3_MT_HELLO_REQUEST)
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/* The server may always send 'Hello Request' messages --
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* we are doing a handshake anyway now, so ignore them
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* if their format is correct. Does not count for
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* 'Finished' MAC. */
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if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
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{
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s->init_num = 0;
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skip_message = 1;
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if (s->msg_callback)
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s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
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}
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}
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while (skip_message);
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/* s->init_num == 4 */
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if ((mt >= 0) && (*p != mt))
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{
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al=SSL_AD_UNEXPECTED_MESSAGE;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
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goto f_err;
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}
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if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
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(st1 == SSL3_ST_SR_CERT_A) &&
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(stn == SSL3_ST_SR_CERT_B))
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{
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/* At this point we have got an MS SGC second client
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* hello (maybe we should always allow the client to
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* start a new handshake?). We need to restart the mac.
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* Don't increment {num,total}_renegotiations because
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* we have not completed the handshake. */
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ssl3_init_finished_mac(s);
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}
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s->s3->tmp.message_type= *(p++);
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n2l3(p,l);
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if (l > (unsigned long)max)
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{
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al=SSL_AD_ILLEGAL_PARAMETER;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
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goto f_err;
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}
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if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
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{
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al=SSL_AD_ILLEGAL_PARAMETER;
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SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
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goto f_err;
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}
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if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
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{
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SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
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goto err;
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}
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s->s3->tmp.message_size=l;
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s->state=stn;
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s->init_msg = s->init_buf->data + 4;
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s->init_num = 0;
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}
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/* next state (stn) */
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p = s->init_msg;
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n = s->s3->tmp.message_size - s->init_num;
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while (n > 0)
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{
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i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
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if (i <= 0)
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{
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s->rwstate=SSL_READING;
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*ok = 0;
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return i;
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}
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s->init_num += i;
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n -= i;
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}
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ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
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if (s->msg_callback)
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s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
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*ok=1;
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return s->init_num;
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f_err:
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ssl3_send_alert(s,SSL3_AL_FATAL,al);
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err:
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*ok=0;
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return(-1);
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}
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int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
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{
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EVP_PKEY *pk;
|
|
int ret= -1,i,j;
|
|
|
|
if (pkey == NULL)
|
|
pk=X509_get_pubkey(x);
|
|
else
|
|
pk=pkey;
|
|
if (pk == NULL) goto err;
|
|
|
|
i=pk->type;
|
|
if (i == EVP_PKEY_RSA)
|
|
{
|
|
ret=SSL_PKEY_RSA_ENC;
|
|
if (x != NULL)
|
|
{
|
|
j=X509_get_ext_count(x);
|
|
/* check to see if this is a signing only certificate */
|
|
/* EAY EAY EAY EAY */
|
|
}
|
|
}
|
|
else if (i == EVP_PKEY_DSA)
|
|
{
|
|
ret=SSL_PKEY_DSA_SIGN;
|
|
}
|
|
else if (i == EVP_PKEY_DH)
|
|
{
|
|
/* if we just have a key, we needs to be guess */
|
|
|
|
if (x == NULL)
|
|
ret=SSL_PKEY_DH_DSA;
|
|
else
|
|
{
|
|
j=X509_get_signature_type(x);
|
|
if (j == EVP_PKEY_RSA)
|
|
ret=SSL_PKEY_DH_RSA;
|
|
else if (j== EVP_PKEY_DSA)
|
|
ret=SSL_PKEY_DH_DSA;
|
|
else ret= -1;
|
|
}
|
|
}
|
|
else
|
|
ret= -1;
|
|
|
|
err:
|
|
if(!pkey) EVP_PKEY_free(pk);
|
|
return(ret);
|
|
}
|
|
|
|
int ssl_verify_alarm_type(long type)
|
|
{
|
|
int al;
|
|
|
|
switch(type)
|
|
{
|
|
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
|
|
case X509_V_ERR_UNABLE_TO_GET_CRL:
|
|
case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
|
|
al=SSL_AD_UNKNOWN_CA;
|
|
break;
|
|
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
|
|
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
|
|
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
|
|
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
|
|
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
|
|
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
|
|
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
|
|
case X509_V_ERR_CERT_NOT_YET_VALID:
|
|
case X509_V_ERR_CRL_NOT_YET_VALID:
|
|
case X509_V_ERR_CERT_UNTRUSTED:
|
|
case X509_V_ERR_CERT_REJECTED:
|
|
al=SSL_AD_BAD_CERTIFICATE;
|
|
break;
|
|
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
|
|
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
|
|
al=SSL_AD_DECRYPT_ERROR;
|
|
break;
|
|
case X509_V_ERR_CERT_HAS_EXPIRED:
|
|
case X509_V_ERR_CRL_HAS_EXPIRED:
|
|
al=SSL_AD_CERTIFICATE_EXPIRED;
|
|
break;
|
|
case X509_V_ERR_CERT_REVOKED:
|
|
al=SSL_AD_CERTIFICATE_REVOKED;
|
|
break;
|
|
case X509_V_ERR_OUT_OF_MEM:
|
|
al=SSL_AD_INTERNAL_ERROR;
|
|
break;
|
|
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
|
|
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
|
|
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
|
|
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
|
|
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
|
|
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
|
|
case X509_V_ERR_INVALID_CA:
|
|
al=SSL_AD_UNKNOWN_CA;
|
|
break;
|
|
case X509_V_ERR_APPLICATION_VERIFICATION:
|
|
al=SSL_AD_HANDSHAKE_FAILURE;
|
|
break;
|
|
case X509_V_ERR_INVALID_PURPOSE:
|
|
al=SSL_AD_UNSUPPORTED_CERTIFICATE;
|
|
break;
|
|
default:
|
|
al=SSL_AD_CERTIFICATE_UNKNOWN;
|
|
break;
|
|
}
|
|
return(al);
|
|
}
|
|
|
|
int ssl3_setup_buffers(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
unsigned int extra;
|
|
size_t len;
|
|
|
|
if (s->s3->rbuf.buf == NULL)
|
|
{
|
|
if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
|
|
extra=SSL3_RT_MAX_EXTRA;
|
|
else
|
|
extra=0;
|
|
len = SSL3_RT_MAX_PACKET_SIZE + extra;
|
|
if ((p=OPENSSL_malloc(len)) == NULL)
|
|
goto err;
|
|
s->s3->rbuf.buf = p;
|
|
s->s3->rbuf.len = len;
|
|
}
|
|
|
|
if (s->s3->wbuf.buf == NULL)
|
|
{
|
|
len = SSL3_RT_MAX_PACKET_SIZE;
|
|
len += SSL3_RT_HEADER_LENGTH + 256; /* extra space for empty fragment */
|
|
if ((p=OPENSSL_malloc(len)) == NULL)
|
|
goto err;
|
|
s->s3->wbuf.buf = p;
|
|
s->s3->wbuf.len = len;
|
|
}
|
|
s->packet= &(s->s3->rbuf.buf[0]);
|
|
return(1);
|
|
err:
|
|
SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
|
|
return(0);
|
|
}
|