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/* ssl/s3_pkt.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 <errno.h>
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#define USE_SOCKETS
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#include "ssl_locl.h"
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#include <openssl/evp.h>
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#include <openssl/buffer.h>
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static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
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unsigned int len, int create_empty_fragment);
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static int ssl3_get_record(SSL *s);
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int ssl3_read_n(SSL *s, int n, int max, int extend)
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{
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/* If extend == 0, obtain new n-byte packet; if extend == 1, increase
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* packet by another n bytes.
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* The packet will be in the sub-array of s->s3->rbuf.buf specified
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* by s->packet and s->packet_length.
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* (If s->read_ahead is set, 'max' bytes may be stored in rbuf
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* [plus s->packet_length bytes if extend == 1].)
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*/
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int i,off,newb;
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if (!extend)
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{
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/* start with empty packet ... */
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if (s->s3->rbuf.left == 0)
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s->s3->rbuf.offset = 0;
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s->packet = s->s3->rbuf.buf + s->s3->rbuf.offset;
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s->packet_length = 0;
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/* ... now we can act as if 'extend' was set */
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}
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/* extend reads should not span multiple packets for DTLS */
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if ( SSL_version(s) == DTLS1_VERSION &&
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extend)
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{
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if ( s->s3->rbuf.left > 0 && n > s->s3->rbuf.left)
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n = s->s3->rbuf.left;
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}
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/* if there is enough in the buffer from a previous read, take some */
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if (s->s3->rbuf.left >= (int)n)
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{
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s->packet_length+=n;
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s->s3->rbuf.left-=n;
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s->s3->rbuf.offset+=n;
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return(n);
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}
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/* else we need to read more data */
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if (!s->read_ahead)
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max=n;
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{
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/* avoid buffer overflow */
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int max_max = s->s3->rbuf.len - s->packet_length;
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if (max > max_max)
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max = max_max;
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}
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if (n > max) /* does not happen */
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{
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SSLerr(SSL_F_SSL3_READ_N,ERR_R_INTERNAL_ERROR);
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return -1;
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}
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off = s->packet_length;
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newb = s->s3->rbuf.left;
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/* Move any available bytes to front of buffer:
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* 'off' bytes already pointed to by 'packet',
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* 'newb' extra ones at the end */
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if (s->packet != s->s3->rbuf.buf)
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{
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/* off > 0 */
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memmove(s->s3->rbuf.buf, s->packet, off+newb);
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s->packet = s->s3->rbuf.buf;
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}
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while (newb < n)
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{
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/* Now we have off+newb bytes at the front of s->s3->rbuf.buf and need
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* to read in more until we have off+n (up to off+max if possible) */
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clear_sys_error();
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if (s->rbio != NULL)
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{
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s->rwstate=SSL_READING;
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i=BIO_read(s->rbio, &(s->s3->rbuf.buf[off+newb]), max-newb);
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}
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else
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{
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SSLerr(SSL_F_SSL3_READ_N,SSL_R_READ_BIO_NOT_SET);
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i = -1;
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}
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if (i <= 0)
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{
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s->s3->rbuf.left = newb;
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return(i);
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}
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newb+=i;
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}
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/* done reading, now the book-keeping */
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s->s3->rbuf.offset = off + n;
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s->s3->rbuf.left = newb - n;
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s->packet_length += n;
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s->rwstate=SSL_NOTHING;
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return(n);
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}
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/* Call this to get a new input record.
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* It will return <= 0 if more data is needed, normally due to an error
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* or non-blocking IO.
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* When it finishes, one packet has been decoded and can be found in
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* ssl->s3->rrec.type - is the type of record
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* ssl->s3->rrec.data, - data
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* ssl->s3->rrec.length, - number of bytes
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*/
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/* used only by ssl3_read_bytes */
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static int ssl3_get_record(SSL *s)
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{
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int ssl_major,ssl_minor,al;
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int enc_err,n,i,ret= -1;
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SSL3_RECORD *rr;
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SSL_SESSION *sess;
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unsigned char *p;
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unsigned char md[EVP_MAX_MD_SIZE];
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short version;
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|
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unsigned int mac_size;
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int clear=0;
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|
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size_t extra;
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|
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int decryption_failed_or_bad_record_mac = 0;
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unsigned char *mac = NULL;
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rr= &(s->s3->rrec);
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sess=s->session;
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if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
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extra=SSL3_RT_MAX_EXTRA;
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else
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extra=0;
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if (extra != s->s3->rbuf.len - SSL3_RT_MAX_PACKET_SIZE)
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{
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sl@0
|
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/* actually likely an application error: SLS_OP_MICROSOFT_BIG_SSLV3_BUFFER
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* set after ssl3_setup_buffers() was done */
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SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
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return -1;
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}
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again:
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/* check if we have the header */
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|
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if ( (s->rstate != SSL_ST_READ_BODY) ||
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|
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(s->packet_length < SSL3_RT_HEADER_LENGTH))
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{
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n=ssl3_read_n(s, SSL3_RT_HEADER_LENGTH, s->s3->rbuf.len, 0);
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267 |
if (n <= 0) return(n); /* error or non-blocking */
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s->rstate=SSL_ST_READ_BODY;
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p=s->packet;
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/* Pull apart the header into the SSL3_RECORD */
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rr->type= *(p++);
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274 |
ssl_major= *(p++);
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275 |
ssl_minor= *(p++);
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276 |
version=(ssl_major<<8)|ssl_minor;
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|
277 |
n2s(p,rr->length);
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278 |
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sl@0
|
279 |
/* Lets check version */
|
|
sl@0
|
280 |
if (!s->first_packet)
|
|
sl@0
|
281 |
{
|
|
sl@0
|
282 |
if (version != s->version)
|
|
sl@0
|
283 |
{
|
|
sl@0
|
284 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
|
|
sl@0
|
285 |
/* Send back error using their
|
|
sl@0
|
286 |
* version number :-) */
|
|
sl@0
|
287 |
s->version=version;
|
|
sl@0
|
288 |
al=SSL_AD_PROTOCOL_VERSION;
|
|
sl@0
|
289 |
goto f_err;
|
|
sl@0
|
290 |
}
|
|
sl@0
|
291 |
}
|
|
sl@0
|
292 |
|
|
sl@0
|
293 |
if ((version>>8) != SSL3_VERSION_MAJOR)
|
|
sl@0
|
294 |
{
|
|
sl@0
|
295 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
|
|
sl@0
|
296 |
goto err;
|
|
sl@0
|
297 |
}
|
|
sl@0
|
298 |
|
|
sl@0
|
299 |
if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
|
|
sl@0
|
300 |
{
|
|
sl@0
|
301 |
al=SSL_AD_RECORD_OVERFLOW;
|
|
sl@0
|
302 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG);
|
|
sl@0
|
303 |
goto f_err;
|
|
sl@0
|
304 |
}
|
|
sl@0
|
305 |
|
|
sl@0
|
306 |
/* now s->rstate == SSL_ST_READ_BODY */
|
|
sl@0
|
307 |
}
|
|
sl@0
|
308 |
|
|
sl@0
|
309 |
/* s->rstate == SSL_ST_READ_BODY, get and decode the data */
|
|
sl@0
|
310 |
|
|
sl@0
|
311 |
if (rr->length > s->packet_length-SSL3_RT_HEADER_LENGTH)
|
|
sl@0
|
312 |
{
|
|
sl@0
|
313 |
/* now s->packet_length == SSL3_RT_HEADER_LENGTH */
|
|
sl@0
|
314 |
i=rr->length;
|
|
sl@0
|
315 |
n=ssl3_read_n(s,i,i,1);
|
|
sl@0
|
316 |
if (n <= 0) return(n); /* error or non-blocking io */
|
|
sl@0
|
317 |
/* now n == rr->length,
|
|
sl@0
|
318 |
* and s->packet_length == SSL3_RT_HEADER_LENGTH + rr->length */
|
|
sl@0
|
319 |
}
|
|
sl@0
|
320 |
|
|
sl@0
|
321 |
s->rstate=SSL_ST_READ_HEADER; /* set state for later operations */
|
|
sl@0
|
322 |
|
|
sl@0
|
323 |
/* At this point, s->packet_length == SSL3_RT_HEADER_LNGTH + rr->length,
|
|
sl@0
|
324 |
* and we have that many bytes in s->packet
|
|
sl@0
|
325 |
*/
|
|
sl@0
|
326 |
rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]);
|
|
sl@0
|
327 |
|
|
sl@0
|
328 |
/* ok, we can now read from 's->packet' data into 'rr'
|
|
sl@0
|
329 |
* rr->input points at rr->length bytes, which
|
|
sl@0
|
330 |
* need to be copied into rr->data by either
|
|
sl@0
|
331 |
* the decryption or by the decompression
|
|
sl@0
|
332 |
* When the data is 'copied' into the rr->data buffer,
|
|
sl@0
|
333 |
* rr->input will be pointed at the new buffer */
|
|
sl@0
|
334 |
|
|
sl@0
|
335 |
/* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
|
|
sl@0
|
336 |
* rr->length bytes of encrypted compressed stuff. */
|
|
sl@0
|
337 |
|
|
sl@0
|
338 |
/* check is not needed I believe */
|
|
sl@0
|
339 |
if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
|
|
sl@0
|
340 |
{
|
|
sl@0
|
341 |
al=SSL_AD_RECORD_OVERFLOW;
|
|
sl@0
|
342 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
|
|
sl@0
|
343 |
goto f_err;
|
|
sl@0
|
344 |
}
|
|
sl@0
|
345 |
|
|
sl@0
|
346 |
/* decrypt in place in 'rr->input' */
|
|
sl@0
|
347 |
rr->data=rr->input;
|
|
sl@0
|
348 |
|
|
sl@0
|
349 |
enc_err = s->method->ssl3_enc->enc(s,0);
|
|
sl@0
|
350 |
if (enc_err <= 0)
|
|
sl@0
|
351 |
{
|
|
sl@0
|
352 |
if (enc_err == 0)
|
|
sl@0
|
353 |
/* SSLerr() and ssl3_send_alert() have been called */
|
|
sl@0
|
354 |
goto err;
|
|
sl@0
|
355 |
|
|
sl@0
|
356 |
/* Otherwise enc_err == -1, which indicates bad padding
|
|
sl@0
|
357 |
* (rec->length has not been changed in this case).
|
|
sl@0
|
358 |
* To minimize information leaked via timing, we will perform
|
|
sl@0
|
359 |
* the MAC computation anyway. */
|
|
sl@0
|
360 |
decryption_failed_or_bad_record_mac = 1;
|
|
sl@0
|
361 |
}
|
|
sl@0
|
362 |
|
|
sl@0
|
363 |
#ifdef TLS_DEBUG
|
|
sl@0
|
364 |
printf("dec %d\n",rr->length);
|
|
sl@0
|
365 |
{ unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); }
|
|
sl@0
|
366 |
printf("\n");
|
|
sl@0
|
367 |
#endif
|
|
sl@0
|
368 |
|
|
sl@0
|
369 |
/* r->length is now the compressed data plus mac */
|
|
sl@0
|
370 |
if ( (sess == NULL) ||
|
|
sl@0
|
371 |
(s->enc_read_ctx == NULL) ||
|
|
sl@0
|
372 |
(s->read_hash == NULL))
|
|
sl@0
|
373 |
clear=1;
|
|
sl@0
|
374 |
|
|
sl@0
|
375 |
if (!clear)
|
|
sl@0
|
376 |
{
|
|
sl@0
|
377 |
mac_size=EVP_MD_size(s->read_hash);
|
|
sl@0
|
378 |
|
|
sl@0
|
379 |
if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size)
|
|
sl@0
|
380 |
{
|
|
sl@0
|
381 |
#if 0 /* OK only for stream ciphers (then rr->length is visible from ciphertext anyway) */
|
|
sl@0
|
382 |
al=SSL_AD_RECORD_OVERFLOW;
|
|
sl@0
|
383 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PRE_MAC_LENGTH_TOO_LONG);
|
|
sl@0
|
384 |
goto f_err;
|
|
sl@0
|
385 |
#else
|
|
sl@0
|
386 |
decryption_failed_or_bad_record_mac = 1;
|
|
sl@0
|
387 |
#endif
|
|
sl@0
|
388 |
}
|
|
sl@0
|
389 |
/* check the MAC for rr->input (it's in mac_size bytes at the tail) */
|
|
sl@0
|
390 |
if (rr->length >= mac_size)
|
|
sl@0
|
391 |
{
|
|
sl@0
|
392 |
rr->length -= mac_size;
|
|
sl@0
|
393 |
mac = &rr->data[rr->length];
|
|
sl@0
|
394 |
}
|
|
sl@0
|
395 |
else
|
|
sl@0
|
396 |
{
|
|
sl@0
|
397 |
/* record (minus padding) is too short to contain a MAC */
|
|
sl@0
|
398 |
#if 0 /* OK only for stream ciphers */
|
|
sl@0
|
399 |
al=SSL_AD_DECODE_ERROR;
|
|
sl@0
|
400 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT);
|
|
sl@0
|
401 |
goto f_err;
|
|
sl@0
|
402 |
#else
|
|
sl@0
|
403 |
decryption_failed_or_bad_record_mac = 1;
|
|
sl@0
|
404 |
rr->length = 0;
|
|
sl@0
|
405 |
#endif
|
|
sl@0
|
406 |
}
|
|
sl@0
|
407 |
i=s->method->ssl3_enc->mac(s,md,0);
|
|
sl@0
|
408 |
if (mac == NULL || memcmp(md, mac, mac_size) != 0)
|
|
sl@0
|
409 |
{
|
|
sl@0
|
410 |
decryption_failed_or_bad_record_mac = 1;
|
|
sl@0
|
411 |
}
|
|
sl@0
|
412 |
}
|
|
sl@0
|
413 |
|
|
sl@0
|
414 |
if (decryption_failed_or_bad_record_mac)
|
|
sl@0
|
415 |
{
|
|
sl@0
|
416 |
/* A separate 'decryption_failed' alert was introduced with TLS 1.0,
|
|
sl@0
|
417 |
* SSL 3.0 only has 'bad_record_mac'. But unless a decryption
|
|
sl@0
|
418 |
* failure is directly visible from the ciphertext anyway,
|
|
sl@0
|
419 |
* we should not reveal which kind of error occured -- this
|
|
sl@0
|
420 |
* might become visible to an attacker (e.g. via a logfile) */
|
|
sl@0
|
421 |
al=SSL_AD_BAD_RECORD_MAC;
|
|
sl@0
|
422 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
|
|
sl@0
|
423 |
goto f_err;
|
|
sl@0
|
424 |
}
|
|
sl@0
|
425 |
|
|
sl@0
|
426 |
/* r->length is now just compressed */
|
|
sl@0
|
427 |
if (s->expand != NULL)
|
|
sl@0
|
428 |
{
|
|
sl@0
|
429 |
if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra)
|
|
sl@0
|
430 |
{
|
|
sl@0
|
431 |
al=SSL_AD_RECORD_OVERFLOW;
|
|
sl@0
|
432 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
|
|
sl@0
|
433 |
goto f_err;
|
|
sl@0
|
434 |
}
|
|
sl@0
|
435 |
if (!ssl3_do_uncompress(s))
|
|
sl@0
|
436 |
{
|
|
sl@0
|
437 |
al=SSL_AD_DECOMPRESSION_FAILURE;
|
|
sl@0
|
438 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION);
|
|
sl@0
|
439 |
goto f_err;
|
|
sl@0
|
440 |
}
|
|
sl@0
|
441 |
}
|
|
sl@0
|
442 |
|
|
sl@0
|
443 |
if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH+extra)
|
|
sl@0
|
444 |
{
|
|
sl@0
|
445 |
al=SSL_AD_RECORD_OVERFLOW;
|
|
sl@0
|
446 |
SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
|
|
sl@0
|
447 |
goto f_err;
|
|
sl@0
|
448 |
}
|
|
sl@0
|
449 |
|
|
sl@0
|
450 |
rr->off=0;
|
|
sl@0
|
451 |
/* So at this point the following is true
|
|
sl@0
|
452 |
* ssl->s3->rrec.type is the type of record
|
|
sl@0
|
453 |
* ssl->s3->rrec.length == number of bytes in record
|
|
sl@0
|
454 |
* ssl->s3->rrec.off == offset to first valid byte
|
|
sl@0
|
455 |
* ssl->s3->rrec.data == where to take bytes from, increment
|
|
sl@0
|
456 |
* after use :-).
|
|
sl@0
|
457 |
*/
|
|
sl@0
|
458 |
|
|
sl@0
|
459 |
/* we have pulled in a full packet so zero things */
|
|
sl@0
|
460 |
s->packet_length=0;
|
|
sl@0
|
461 |
|
|
sl@0
|
462 |
/* just read a 0 length packet */
|
|
sl@0
|
463 |
if (rr->length == 0) goto again;
|
|
sl@0
|
464 |
|
|
sl@0
|
465 |
return(1);
|
|
sl@0
|
466 |
|
|
sl@0
|
467 |
f_err:
|
|
sl@0
|
468 |
ssl3_send_alert(s,SSL3_AL_FATAL,al);
|
|
sl@0
|
469 |
err:
|
|
sl@0
|
470 |
return(ret);
|
|
sl@0
|
471 |
}
|
|
sl@0
|
472 |
|
|
sl@0
|
473 |
int ssl3_do_uncompress(SSL *ssl)
|
|
sl@0
|
474 |
{
|
|
sl@0
|
475 |
#ifndef OPENSSL_NO_COMP
|
|
sl@0
|
476 |
int i;
|
|
sl@0
|
477 |
SSL3_RECORD *rr;
|
|
sl@0
|
478 |
|
|
sl@0
|
479 |
rr= &(ssl->s3->rrec);
|
|
sl@0
|
480 |
i=COMP_expand_block(ssl->expand,rr->comp,
|
|
sl@0
|
481 |
SSL3_RT_MAX_PLAIN_LENGTH,rr->data,(int)rr->length);
|
|
sl@0
|
482 |
if (i < 0)
|
|
sl@0
|
483 |
return(0);
|
|
sl@0
|
484 |
else
|
|
sl@0
|
485 |
rr->length=i;
|
|
sl@0
|
486 |
rr->data=rr->comp;
|
|
sl@0
|
487 |
#endif
|
|
sl@0
|
488 |
return(1);
|
|
sl@0
|
489 |
}
|
|
sl@0
|
490 |
|
|
sl@0
|
491 |
int ssl3_do_compress(SSL *ssl)
|
|
sl@0
|
492 |
{
|
|
sl@0
|
493 |
#ifndef OPENSSL_NO_COMP
|
|
sl@0
|
494 |
int i;
|
|
sl@0
|
495 |
SSL3_RECORD *wr;
|
|
sl@0
|
496 |
|
|
sl@0
|
497 |
wr= &(ssl->s3->wrec);
|
|
sl@0
|
498 |
i=COMP_compress_block(ssl->compress,wr->data,
|
|
sl@0
|
499 |
SSL3_RT_MAX_COMPRESSED_LENGTH,
|
|
sl@0
|
500 |
wr->input,(int)wr->length);
|
|
sl@0
|
501 |
if (i < 0)
|
|
sl@0
|
502 |
return(0);
|
|
sl@0
|
503 |
else
|
|
sl@0
|
504 |
wr->length=i;
|
|
sl@0
|
505 |
|
|
sl@0
|
506 |
wr->input=wr->data;
|
|
sl@0
|
507 |
#endif
|
|
sl@0
|
508 |
return(1);
|
|
sl@0
|
509 |
}
|
|
sl@0
|
510 |
|
|
sl@0
|
511 |
/* Call this to write data in records of type 'type'
|
|
sl@0
|
512 |
* It will return <= 0 if not all data has been sent or non-blocking IO.
|
|
sl@0
|
513 |
*/
|
|
sl@0
|
514 |
int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
|
|
sl@0
|
515 |
{
|
|
sl@0
|
516 |
const unsigned char *buf=buf_;
|
|
sl@0
|
517 |
unsigned int tot,n,nw;
|
|
sl@0
|
518 |
int i;
|
|
sl@0
|
519 |
|
|
sl@0
|
520 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
521 |
tot=s->s3->wnum;
|
|
sl@0
|
522 |
s->s3->wnum=0;
|
|
sl@0
|
523 |
|
|
sl@0
|
524 |
if (SSL_in_init(s) && !s->in_handshake)
|
|
sl@0
|
525 |
{
|
|
sl@0
|
526 |
i=s->handshake_func(s);
|
|
sl@0
|
527 |
if (i < 0) return(i);
|
|
sl@0
|
528 |
if (i == 0)
|
|
sl@0
|
529 |
{
|
|
sl@0
|
530 |
SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
|
|
sl@0
|
531 |
return -1;
|
|
sl@0
|
532 |
}
|
|
sl@0
|
533 |
}
|
|
sl@0
|
534 |
|
|
sl@0
|
535 |
n=(len-tot);
|
|
sl@0
|
536 |
for (;;)
|
|
sl@0
|
537 |
{
|
|
sl@0
|
538 |
if (n > SSL3_RT_MAX_PLAIN_LENGTH)
|
|
sl@0
|
539 |
nw=SSL3_RT_MAX_PLAIN_LENGTH;
|
|
sl@0
|
540 |
else
|
|
sl@0
|
541 |
nw=n;
|
|
sl@0
|
542 |
|
|
sl@0
|
543 |
i=do_ssl3_write(s, type, &(buf[tot]), nw, 0);
|
|
sl@0
|
544 |
if (i <= 0)
|
|
sl@0
|
545 |
{
|
|
sl@0
|
546 |
s->s3->wnum=tot;
|
|
sl@0
|
547 |
return i;
|
|
sl@0
|
548 |
}
|
|
sl@0
|
549 |
|
|
sl@0
|
550 |
if ((i == (int)n) ||
|
|
sl@0
|
551 |
(type == SSL3_RT_APPLICATION_DATA &&
|
|
sl@0
|
552 |
(s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE)))
|
|
sl@0
|
553 |
{
|
|
sl@0
|
554 |
/* next chunk of data should get another prepended empty fragment
|
|
sl@0
|
555 |
* in ciphersuites with known-IV weakness: */
|
|
sl@0
|
556 |
s->s3->empty_fragment_done = 0;
|
|
sl@0
|
557 |
|
|
sl@0
|
558 |
return tot+i;
|
|
sl@0
|
559 |
}
|
|
sl@0
|
560 |
|
|
sl@0
|
561 |
n-=i;
|
|
sl@0
|
562 |
tot+=i;
|
|
sl@0
|
563 |
}
|
|
sl@0
|
564 |
}
|
|
sl@0
|
565 |
|
|
sl@0
|
566 |
static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
|
|
sl@0
|
567 |
unsigned int len, int create_empty_fragment)
|
|
sl@0
|
568 |
{
|
|
sl@0
|
569 |
unsigned char *p,*plen;
|
|
sl@0
|
570 |
int i,mac_size,clear=0;
|
|
sl@0
|
571 |
int prefix_len = 0;
|
|
sl@0
|
572 |
SSL3_RECORD *wr;
|
|
sl@0
|
573 |
SSL3_BUFFER *wb;
|
|
sl@0
|
574 |
SSL_SESSION *sess;
|
|
sl@0
|
575 |
|
|
sl@0
|
576 |
/* first check if there is a SSL3_BUFFER still being written
|
|
sl@0
|
577 |
* out. This will happen with non blocking IO */
|
|
sl@0
|
578 |
if (s->s3->wbuf.left != 0)
|
|
sl@0
|
579 |
return(ssl3_write_pending(s,type,buf,len));
|
|
sl@0
|
580 |
|
|
sl@0
|
581 |
/* If we have an alert to send, lets send it */
|
|
sl@0
|
582 |
if (s->s3->alert_dispatch)
|
|
sl@0
|
583 |
{
|
|
sl@0
|
584 |
i=s->method->ssl_dispatch_alert(s);
|
|
sl@0
|
585 |
if (i <= 0)
|
|
sl@0
|
586 |
return(i);
|
|
sl@0
|
587 |
/* if it went, fall through and send more stuff */
|
|
sl@0
|
588 |
}
|
|
sl@0
|
589 |
|
|
sl@0
|
590 |
if (len == 0 && !create_empty_fragment)
|
|
sl@0
|
591 |
return 0;
|
|
sl@0
|
592 |
|
|
sl@0
|
593 |
wr= &(s->s3->wrec);
|
|
sl@0
|
594 |
wb= &(s->s3->wbuf);
|
|
sl@0
|
595 |
sess=s->session;
|
|
sl@0
|
596 |
|
|
sl@0
|
597 |
if ( (sess == NULL) ||
|
|
sl@0
|
598 |
(s->enc_write_ctx == NULL) ||
|
|
sl@0
|
599 |
(s->write_hash == NULL))
|
|
sl@0
|
600 |
clear=1;
|
|
sl@0
|
601 |
|
|
sl@0
|
602 |
if (clear)
|
|
sl@0
|
603 |
mac_size=0;
|
|
sl@0
|
604 |
else
|
|
sl@0
|
605 |
mac_size=EVP_MD_size(s->write_hash);
|
|
sl@0
|
606 |
|
|
sl@0
|
607 |
/* 'create_empty_fragment' is true only when this function calls itself */
|
|
sl@0
|
608 |
if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done)
|
|
sl@0
|
609 |
{
|
|
sl@0
|
610 |
/* countermeasure against known-IV weakness in CBC ciphersuites
|
|
sl@0
|
611 |
* (see http://www.openssl.org/~bodo/tls-cbc.txt) */
|
|
sl@0
|
612 |
|
|
sl@0
|
613 |
if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA)
|
|
sl@0
|
614 |
{
|
|
sl@0
|
615 |
/* recursive function call with 'create_empty_fragment' set;
|
|
sl@0
|
616 |
* this prepares and buffers the data for an empty fragment
|
|
sl@0
|
617 |
* (these 'prefix_len' bytes are sent out later
|
|
sl@0
|
618 |
* together with the actual payload) */
|
|
sl@0
|
619 |
prefix_len = do_ssl3_write(s, type, buf, 0, 1);
|
|
sl@0
|
620 |
if (prefix_len <= 0)
|
|
sl@0
|
621 |
goto err;
|
|
sl@0
|
622 |
|
|
sl@0
|
623 |
if (s->s3->wbuf.len < (size_t)prefix_len + SSL3_RT_MAX_PACKET_SIZE)
|
|
sl@0
|
624 |
{
|
|
sl@0
|
625 |
/* insufficient space */
|
|
sl@0
|
626 |
SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR);
|
|
sl@0
|
627 |
goto err;
|
|
sl@0
|
628 |
}
|
|
sl@0
|
629 |
}
|
|
sl@0
|
630 |
|
|
sl@0
|
631 |
s->s3->empty_fragment_done = 1;
|
|
sl@0
|
632 |
}
|
|
sl@0
|
633 |
|
|
sl@0
|
634 |
p = wb->buf + prefix_len;
|
|
sl@0
|
635 |
|
|
sl@0
|
636 |
/* write the header */
|
|
sl@0
|
637 |
|
|
sl@0
|
638 |
*(p++)=type&0xff;
|
|
sl@0
|
639 |
wr->type=type;
|
|
sl@0
|
640 |
|
|
sl@0
|
641 |
*(p++)=(s->version>>8);
|
|
sl@0
|
642 |
*(p++)=s->version&0xff;
|
|
sl@0
|
643 |
|
|
sl@0
|
644 |
/* field where we are to write out packet length */
|
|
sl@0
|
645 |
plen=p;
|
|
sl@0
|
646 |
p+=2;
|
|
sl@0
|
647 |
|
|
sl@0
|
648 |
/* lets setup the record stuff. */
|
|
sl@0
|
649 |
wr->data=p;
|
|
sl@0
|
650 |
wr->length=(int)len;
|
|
sl@0
|
651 |
wr->input=(unsigned char *)buf;
|
|
sl@0
|
652 |
|
|
sl@0
|
653 |
/* we now 'read' from wr->input, wr->length bytes into
|
|
sl@0
|
654 |
* wr->data */
|
|
sl@0
|
655 |
|
|
sl@0
|
656 |
/* first we compress */
|
|
sl@0
|
657 |
if (s->compress != NULL)
|
|
sl@0
|
658 |
{
|
|
sl@0
|
659 |
if (!ssl3_do_compress(s))
|
|
sl@0
|
660 |
{
|
|
sl@0
|
661 |
SSLerr(SSL_F_DO_SSL3_WRITE,SSL_R_COMPRESSION_FAILURE);
|
|
sl@0
|
662 |
goto err;
|
|
sl@0
|
663 |
}
|
|
sl@0
|
664 |
}
|
|
sl@0
|
665 |
else
|
|
sl@0
|
666 |
{
|
|
sl@0
|
667 |
memcpy(wr->data,wr->input,wr->length);
|
|
sl@0
|
668 |
wr->input=wr->data;
|
|
sl@0
|
669 |
}
|
|
sl@0
|
670 |
|
|
sl@0
|
671 |
/* we should still have the output to wr->data and the input
|
|
sl@0
|
672 |
* from wr->input. Length should be wr->length.
|
|
sl@0
|
673 |
* wr->data still points in the wb->buf */
|
|
sl@0
|
674 |
|
|
sl@0
|
675 |
if (mac_size != 0)
|
|
sl@0
|
676 |
{
|
|
sl@0
|
677 |
s->method->ssl3_enc->mac(s,&(p[wr->length]),1);
|
|
sl@0
|
678 |
wr->length+=mac_size;
|
|
sl@0
|
679 |
wr->input=p;
|
|
sl@0
|
680 |
wr->data=p;
|
|
sl@0
|
681 |
}
|
|
sl@0
|
682 |
|
|
sl@0
|
683 |
/* ssl3_enc can only have an error on read */
|
|
sl@0
|
684 |
s->method->ssl3_enc->enc(s,1);
|
|
sl@0
|
685 |
|
|
sl@0
|
686 |
/* record length after mac and block padding */
|
|
sl@0
|
687 |
s2n(wr->length,plen);
|
|
sl@0
|
688 |
|
|
sl@0
|
689 |
/* we should now have
|
|
sl@0
|
690 |
* wr->data pointing to the encrypted data, which is
|
|
sl@0
|
691 |
* wr->length long */
|
|
sl@0
|
692 |
wr->type=type; /* not needed but helps for debugging */
|
|
sl@0
|
693 |
wr->length+=SSL3_RT_HEADER_LENGTH;
|
|
sl@0
|
694 |
|
|
sl@0
|
695 |
if (create_empty_fragment)
|
|
sl@0
|
696 |
{
|
|
sl@0
|
697 |
/* we are in a recursive call;
|
|
sl@0
|
698 |
* just return the length, don't write out anything here
|
|
sl@0
|
699 |
*/
|
|
sl@0
|
700 |
return wr->length;
|
|
sl@0
|
701 |
}
|
|
sl@0
|
702 |
|
|
sl@0
|
703 |
/* now let's set up wb */
|
|
sl@0
|
704 |
wb->left = prefix_len + wr->length;
|
|
sl@0
|
705 |
wb->offset = 0;
|
|
sl@0
|
706 |
|
|
sl@0
|
707 |
/* memorize arguments so that ssl3_write_pending can detect bad write retries later */
|
|
sl@0
|
708 |
s->s3->wpend_tot=len;
|
|
sl@0
|
709 |
s->s3->wpend_buf=buf;
|
|
sl@0
|
710 |
s->s3->wpend_type=type;
|
|
sl@0
|
711 |
s->s3->wpend_ret=len;
|
|
sl@0
|
712 |
|
|
sl@0
|
713 |
/* we now just need to write the buffer */
|
|
sl@0
|
714 |
return ssl3_write_pending(s,type,buf,len);
|
|
sl@0
|
715 |
err:
|
|
sl@0
|
716 |
return -1;
|
|
sl@0
|
717 |
}
|
|
sl@0
|
718 |
|
|
sl@0
|
719 |
/* if s->s3->wbuf.left != 0, we need to call this */
|
|
sl@0
|
720 |
int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
|
|
sl@0
|
721 |
unsigned int len)
|
|
sl@0
|
722 |
{
|
|
sl@0
|
723 |
int i;
|
|
sl@0
|
724 |
|
|
sl@0
|
725 |
/* XXXX */
|
|
sl@0
|
726 |
if ((s->s3->wpend_tot > (int)len)
|
|
sl@0
|
727 |
|| ((s->s3->wpend_buf != buf) &&
|
|
sl@0
|
728 |
!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER))
|
|
sl@0
|
729 |
|| (s->s3->wpend_type != type))
|
|
sl@0
|
730 |
{
|
|
sl@0
|
731 |
SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
|
|
sl@0
|
732 |
return(-1);
|
|
sl@0
|
733 |
}
|
|
sl@0
|
734 |
|
|
sl@0
|
735 |
for (;;)
|
|
sl@0
|
736 |
{
|
|
sl@0
|
737 |
clear_sys_error();
|
|
sl@0
|
738 |
if (s->wbio != NULL)
|
|
sl@0
|
739 |
{
|
|
sl@0
|
740 |
s->rwstate=SSL_WRITING;
|
|
sl@0
|
741 |
i=BIO_write(s->wbio,
|
|
sl@0
|
742 |
(char *)&(s->s3->wbuf.buf[s->s3->wbuf.offset]),
|
|
sl@0
|
743 |
(unsigned int)s->s3->wbuf.left);
|
|
sl@0
|
744 |
}
|
|
sl@0
|
745 |
else
|
|
sl@0
|
746 |
{
|
|
sl@0
|
747 |
SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BIO_NOT_SET);
|
|
sl@0
|
748 |
i= -1;
|
|
sl@0
|
749 |
}
|
|
sl@0
|
750 |
if (i == s->s3->wbuf.left)
|
|
sl@0
|
751 |
{
|
|
sl@0
|
752 |
s->s3->wbuf.left=0;
|
|
sl@0
|
753 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
754 |
return(s->s3->wpend_ret);
|
|
sl@0
|
755 |
}
|
|
sl@0
|
756 |
else if (i <= 0)
|
|
sl@0
|
757 |
return(i);
|
|
sl@0
|
758 |
s->s3->wbuf.offset+=i;
|
|
sl@0
|
759 |
s->s3->wbuf.left-=i;
|
|
sl@0
|
760 |
}
|
|
sl@0
|
761 |
}
|
|
sl@0
|
762 |
|
|
sl@0
|
763 |
/* Return up to 'len' payload bytes received in 'type' records.
|
|
sl@0
|
764 |
* 'type' is one of the following:
|
|
sl@0
|
765 |
*
|
|
sl@0
|
766 |
* - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
|
|
sl@0
|
767 |
* - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
|
|
sl@0
|
768 |
* - 0 (during a shutdown, no data has to be returned)
|
|
sl@0
|
769 |
*
|
|
sl@0
|
770 |
* If we don't have stored data to work from, read a SSL/TLS record first
|
|
sl@0
|
771 |
* (possibly multiple records if we still don't have anything to return).
|
|
sl@0
|
772 |
*
|
|
sl@0
|
773 |
* This function must handle any surprises the peer may have for us, such as
|
|
sl@0
|
774 |
* Alert records (e.g. close_notify), ChangeCipherSpec records (not really
|
|
sl@0
|
775 |
* a surprise, but handled as if it were), or renegotiation requests.
|
|
sl@0
|
776 |
* Also if record payloads contain fragments too small to process, we store
|
|
sl@0
|
777 |
* them until there is enough for the respective protocol (the record protocol
|
|
sl@0
|
778 |
* may use arbitrary fragmentation and even interleaving):
|
|
sl@0
|
779 |
* Change cipher spec protocol
|
|
sl@0
|
780 |
* just 1 byte needed, no need for keeping anything stored
|
|
sl@0
|
781 |
* Alert protocol
|
|
sl@0
|
782 |
* 2 bytes needed (AlertLevel, AlertDescription)
|
|
sl@0
|
783 |
* Handshake protocol
|
|
sl@0
|
784 |
* 4 bytes needed (HandshakeType, uint24 length) -- we just have
|
|
sl@0
|
785 |
* to detect unexpected Client Hello and Hello Request messages
|
|
sl@0
|
786 |
* here, anything else is handled by higher layers
|
|
sl@0
|
787 |
* Application data protocol
|
|
sl@0
|
788 |
* none of our business
|
|
sl@0
|
789 |
*/
|
|
sl@0
|
790 |
int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
|
|
sl@0
|
791 |
{
|
|
sl@0
|
792 |
int al,i,j,ret;
|
|
sl@0
|
793 |
unsigned int n;
|
|
sl@0
|
794 |
SSL3_RECORD *rr;
|
|
sl@0
|
795 |
void (*cb)(const SSL *ssl,int type2,int val)=NULL;
|
|
sl@0
|
796 |
|
|
sl@0
|
797 |
if (s->s3->rbuf.buf == NULL) /* Not initialized yet */
|
|
sl@0
|
798 |
if (!ssl3_setup_buffers(s))
|
|
sl@0
|
799 |
return(-1);
|
|
sl@0
|
800 |
|
|
sl@0
|
801 |
if ((type && (type != SSL3_RT_APPLICATION_DATA) && (type != SSL3_RT_HANDSHAKE) && type) ||
|
|
sl@0
|
802 |
(peek && (type != SSL3_RT_APPLICATION_DATA)))
|
|
sl@0
|
803 |
{
|
|
sl@0
|
804 |
SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
|
|
sl@0
|
805 |
return -1;
|
|
sl@0
|
806 |
}
|
|
sl@0
|
807 |
|
|
sl@0
|
808 |
if ((type == SSL3_RT_HANDSHAKE) && (s->s3->handshake_fragment_len > 0))
|
|
sl@0
|
809 |
/* (partially) satisfy request from storage */
|
|
sl@0
|
810 |
{
|
|
sl@0
|
811 |
unsigned char *src = s->s3->handshake_fragment;
|
|
sl@0
|
812 |
unsigned char *dst = buf;
|
|
sl@0
|
813 |
unsigned int k;
|
|
sl@0
|
814 |
|
|
sl@0
|
815 |
/* peek == 0 */
|
|
sl@0
|
816 |
n = 0;
|
|
sl@0
|
817 |
while ((len > 0) && (s->s3->handshake_fragment_len > 0))
|
|
sl@0
|
818 |
{
|
|
sl@0
|
819 |
*dst++ = *src++;
|
|
sl@0
|
820 |
len--; s->s3->handshake_fragment_len--;
|
|
sl@0
|
821 |
n++;
|
|
sl@0
|
822 |
}
|
|
sl@0
|
823 |
/* move any remaining fragment bytes: */
|
|
sl@0
|
824 |
for (k = 0; k < s->s3->handshake_fragment_len; k++)
|
|
sl@0
|
825 |
s->s3->handshake_fragment[k] = *src++;
|
|
sl@0
|
826 |
return n;
|
|
sl@0
|
827 |
}
|
|
sl@0
|
828 |
|
|
sl@0
|
829 |
/* Now s->s3->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */
|
|
sl@0
|
830 |
|
|
sl@0
|
831 |
if (!s->in_handshake && SSL_in_init(s))
|
|
sl@0
|
832 |
{
|
|
sl@0
|
833 |
/* type == SSL3_RT_APPLICATION_DATA */
|
|
sl@0
|
834 |
i=s->handshake_func(s);
|
|
sl@0
|
835 |
if (i < 0) return(i);
|
|
sl@0
|
836 |
if (i == 0)
|
|
sl@0
|
837 |
{
|
|
sl@0
|
838 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
|
|
sl@0
|
839 |
return(-1);
|
|
sl@0
|
840 |
}
|
|
sl@0
|
841 |
}
|
|
sl@0
|
842 |
start:
|
|
sl@0
|
843 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
844 |
|
|
sl@0
|
845 |
/* s->s3->rrec.type - is the type of record
|
|
sl@0
|
846 |
* s->s3->rrec.data, - data
|
|
sl@0
|
847 |
* s->s3->rrec.off, - offset into 'data' for next read
|
|
sl@0
|
848 |
* s->s3->rrec.length, - number of bytes. */
|
|
sl@0
|
849 |
rr = &(s->s3->rrec);
|
|
sl@0
|
850 |
|
|
sl@0
|
851 |
/* get new packet if necessary */
|
|
sl@0
|
852 |
if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
|
|
sl@0
|
853 |
{
|
|
sl@0
|
854 |
ret=ssl3_get_record(s);
|
|
sl@0
|
855 |
if (ret <= 0) return(ret);
|
|
sl@0
|
856 |
}
|
|
sl@0
|
857 |
|
|
sl@0
|
858 |
/* we now have a packet which can be read and processed */
|
|
sl@0
|
859 |
|
|
sl@0
|
860 |
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
|
|
sl@0
|
861 |
* reset by ssl3_get_finished */
|
|
sl@0
|
862 |
&& (rr->type != SSL3_RT_HANDSHAKE))
|
|
sl@0
|
863 |
{
|
|
sl@0
|
864 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
865 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
|
|
sl@0
|
866 |
goto f_err;
|
|
sl@0
|
867 |
}
|
|
sl@0
|
868 |
|
|
sl@0
|
869 |
/* If the other end has shut down, throw anything we read away
|
|
sl@0
|
870 |
* (even in 'peek' mode) */
|
|
sl@0
|
871 |
if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
|
|
sl@0
|
872 |
{
|
|
sl@0
|
873 |
rr->length=0;
|
|
sl@0
|
874 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
875 |
return(0);
|
|
sl@0
|
876 |
}
|
|
sl@0
|
877 |
|
|
sl@0
|
878 |
|
|
sl@0
|
879 |
if (type == rr->type) /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */
|
|
sl@0
|
880 |
{
|
|
sl@0
|
881 |
/* make sure that we are not getting application data when we
|
|
sl@0
|
882 |
* are doing a handshake for the first time */
|
|
sl@0
|
883 |
if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
|
|
sl@0
|
884 |
(s->enc_read_ctx == NULL))
|
|
sl@0
|
885 |
{
|
|
sl@0
|
886 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
887 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
|
|
sl@0
|
888 |
goto f_err;
|
|
sl@0
|
889 |
}
|
|
sl@0
|
890 |
|
|
sl@0
|
891 |
if (len <= 0) return(len);
|
|
sl@0
|
892 |
|
|
sl@0
|
893 |
if ((unsigned int)len > rr->length)
|
|
sl@0
|
894 |
n = rr->length;
|
|
sl@0
|
895 |
else
|
|
sl@0
|
896 |
n = (unsigned int)len;
|
|
sl@0
|
897 |
|
|
sl@0
|
898 |
memcpy(buf,&(rr->data[rr->off]),n);
|
|
sl@0
|
899 |
if (!peek)
|
|
sl@0
|
900 |
{
|
|
sl@0
|
901 |
rr->length-=n;
|
|
sl@0
|
902 |
rr->off+=n;
|
|
sl@0
|
903 |
if (rr->length == 0)
|
|
sl@0
|
904 |
{
|
|
sl@0
|
905 |
s->rstate=SSL_ST_READ_HEADER;
|
|
sl@0
|
906 |
rr->off=0;
|
|
sl@0
|
907 |
}
|
|
sl@0
|
908 |
}
|
|
sl@0
|
909 |
return(n);
|
|
sl@0
|
910 |
}
|
|
sl@0
|
911 |
|
|
sl@0
|
912 |
|
|
sl@0
|
913 |
/* If we get here, then type != rr->type; if we have a handshake
|
|
sl@0
|
914 |
* message, then it was unexpected (Hello Request or Client Hello). */
|
|
sl@0
|
915 |
|
|
sl@0
|
916 |
/* In case of record types for which we have 'fragment' storage,
|
|
sl@0
|
917 |
* fill that so that we can process the data at a fixed place.
|
|
sl@0
|
918 |
*/
|
|
sl@0
|
919 |
{
|
|
sl@0
|
920 |
unsigned int dest_maxlen = 0;
|
|
sl@0
|
921 |
unsigned char *dest = NULL;
|
|
sl@0
|
922 |
unsigned int *dest_len = NULL;
|
|
sl@0
|
923 |
|
|
sl@0
|
924 |
if (rr->type == SSL3_RT_HANDSHAKE)
|
|
sl@0
|
925 |
{
|
|
sl@0
|
926 |
dest_maxlen = sizeof s->s3->handshake_fragment;
|
|
sl@0
|
927 |
dest = s->s3->handshake_fragment;
|
|
sl@0
|
928 |
dest_len = &s->s3->handshake_fragment_len;
|
|
sl@0
|
929 |
}
|
|
sl@0
|
930 |
else if (rr->type == SSL3_RT_ALERT)
|
|
sl@0
|
931 |
{
|
|
sl@0
|
932 |
dest_maxlen = sizeof s->s3->alert_fragment;
|
|
sl@0
|
933 |
dest = s->s3->alert_fragment;
|
|
sl@0
|
934 |
dest_len = &s->s3->alert_fragment_len;
|
|
sl@0
|
935 |
}
|
|
sl@0
|
936 |
|
|
sl@0
|
937 |
if (dest_maxlen > 0)
|
|
sl@0
|
938 |
{
|
|
sl@0
|
939 |
n = dest_maxlen - *dest_len; /* available space in 'dest' */
|
|
sl@0
|
940 |
if (rr->length < n)
|
|
sl@0
|
941 |
n = rr->length; /* available bytes */
|
|
sl@0
|
942 |
|
|
sl@0
|
943 |
/* now move 'n' bytes: */
|
|
sl@0
|
944 |
while (n-- > 0)
|
|
sl@0
|
945 |
{
|
|
sl@0
|
946 |
dest[(*dest_len)++] = rr->data[rr->off++];
|
|
sl@0
|
947 |
rr->length--;
|
|
sl@0
|
948 |
}
|
|
sl@0
|
949 |
|
|
sl@0
|
950 |
if (*dest_len < dest_maxlen)
|
|
sl@0
|
951 |
goto start; /* fragment was too small */
|
|
sl@0
|
952 |
}
|
|
sl@0
|
953 |
}
|
|
sl@0
|
954 |
|
|
sl@0
|
955 |
/* s->s3->handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE;
|
|
sl@0
|
956 |
* s->s3->alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT.
|
|
sl@0
|
957 |
* (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */
|
|
sl@0
|
958 |
|
|
sl@0
|
959 |
/* If we are a client, check for an incoming 'Hello Request': */
|
|
sl@0
|
960 |
if ((!s->server) &&
|
|
sl@0
|
961 |
(s->s3->handshake_fragment_len >= 4) &&
|
|
sl@0
|
962 |
(s->s3->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
|
|
sl@0
|
963 |
(s->session != NULL) && (s->session->cipher != NULL))
|
|
sl@0
|
964 |
{
|
|
sl@0
|
965 |
s->s3->handshake_fragment_len = 0;
|
|
sl@0
|
966 |
|
|
sl@0
|
967 |
if ((s->s3->handshake_fragment[1] != 0) ||
|
|
sl@0
|
968 |
(s->s3->handshake_fragment[2] != 0) ||
|
|
sl@0
|
969 |
(s->s3->handshake_fragment[3] != 0))
|
|
sl@0
|
970 |
{
|
|
sl@0
|
971 |
al=SSL_AD_DECODE_ERROR;
|
|
sl@0
|
972 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_HELLO_REQUEST);
|
|
sl@0
|
973 |
goto f_err;
|
|
sl@0
|
974 |
}
|
|
sl@0
|
975 |
|
|
sl@0
|
976 |
if (s->msg_callback)
|
|
sl@0
|
977 |
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->s3->handshake_fragment, 4, s, s->msg_callback_arg);
|
|
sl@0
|
978 |
|
|
sl@0
|
979 |
if (SSL_is_init_finished(s) &&
|
|
sl@0
|
980 |
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
|
|
sl@0
|
981 |
!s->s3->renegotiate)
|
|
sl@0
|
982 |
{
|
|
sl@0
|
983 |
ssl3_renegotiate(s);
|
|
sl@0
|
984 |
if (ssl3_renegotiate_check(s))
|
|
sl@0
|
985 |
{
|
|
sl@0
|
986 |
i=s->handshake_func(s);
|
|
sl@0
|
987 |
if (i < 0) return(i);
|
|
sl@0
|
988 |
if (i == 0)
|
|
sl@0
|
989 |
{
|
|
sl@0
|
990 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
|
|
sl@0
|
991 |
return(-1);
|
|
sl@0
|
992 |
}
|
|
sl@0
|
993 |
|
|
sl@0
|
994 |
if (!(s->mode & SSL_MODE_AUTO_RETRY))
|
|
sl@0
|
995 |
{
|
|
sl@0
|
996 |
if (s->s3->rbuf.left == 0) /* no read-ahead left? */
|
|
sl@0
|
997 |
{
|
|
sl@0
|
998 |
BIO *bio;
|
|
sl@0
|
999 |
/* In the case where we try to read application data,
|
|
sl@0
|
1000 |
* but we trigger an SSL handshake, we return -1 with
|
|
sl@0
|
1001 |
* the retry option set. Otherwise renegotiation may
|
|
sl@0
|
1002 |
* cause nasty problems in the blocking world */
|
|
sl@0
|
1003 |
s->rwstate=SSL_READING;
|
|
sl@0
|
1004 |
bio=SSL_get_rbio(s);
|
|
sl@0
|
1005 |
BIO_clear_retry_flags(bio);
|
|
sl@0
|
1006 |
BIO_set_retry_read(bio);
|
|
sl@0
|
1007 |
return(-1);
|
|
sl@0
|
1008 |
}
|
|
sl@0
|
1009 |
}
|
|
sl@0
|
1010 |
}
|
|
sl@0
|
1011 |
}
|
|
sl@0
|
1012 |
/* we either finished a handshake or ignored the request,
|
|
sl@0
|
1013 |
* now try again to obtain the (application) data we were asked for */
|
|
sl@0
|
1014 |
goto start;
|
|
sl@0
|
1015 |
}
|
|
sl@0
|
1016 |
|
|
sl@0
|
1017 |
if (s->s3->alert_fragment_len >= 2)
|
|
sl@0
|
1018 |
{
|
|
sl@0
|
1019 |
int alert_level = s->s3->alert_fragment[0];
|
|
sl@0
|
1020 |
int alert_descr = s->s3->alert_fragment[1];
|
|
sl@0
|
1021 |
|
|
sl@0
|
1022 |
s->s3->alert_fragment_len = 0;
|
|
sl@0
|
1023 |
|
|
sl@0
|
1024 |
if (s->msg_callback)
|
|
sl@0
|
1025 |
s->msg_callback(0, s->version, SSL3_RT_ALERT, s->s3->alert_fragment, 2, s, s->msg_callback_arg);
|
|
sl@0
|
1026 |
|
|
sl@0
|
1027 |
if (s->info_callback != NULL)
|
|
sl@0
|
1028 |
cb=s->info_callback;
|
|
sl@0
|
1029 |
else if (s->ctx->info_callback != NULL)
|
|
sl@0
|
1030 |
cb=s->ctx->info_callback;
|
|
sl@0
|
1031 |
|
|
sl@0
|
1032 |
if (cb != NULL)
|
|
sl@0
|
1033 |
{
|
|
sl@0
|
1034 |
j = (alert_level << 8) | alert_descr;
|
|
sl@0
|
1035 |
cb(s, SSL_CB_READ_ALERT, j);
|
|
sl@0
|
1036 |
}
|
|
sl@0
|
1037 |
|
|
sl@0
|
1038 |
if (alert_level == 1) /* warning */
|
|
sl@0
|
1039 |
{
|
|
sl@0
|
1040 |
s->s3->warn_alert = alert_descr;
|
|
sl@0
|
1041 |
if (alert_descr == SSL_AD_CLOSE_NOTIFY)
|
|
sl@0
|
1042 |
{
|
|
sl@0
|
1043 |
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
|
|
sl@0
|
1044 |
return(0);
|
|
sl@0
|
1045 |
}
|
|
sl@0
|
1046 |
}
|
|
sl@0
|
1047 |
else if (alert_level == 2) /* fatal */
|
|
sl@0
|
1048 |
{
|
|
sl@0
|
1049 |
char tmp[16];
|
|
sl@0
|
1050 |
|
|
sl@0
|
1051 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
1052 |
s->s3->fatal_alert = alert_descr;
|
|
sl@0
|
1053 |
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
|
|
sl@0
|
1054 |
BIO_snprintf(tmp,sizeof tmp,"%d",alert_descr);
|
|
sl@0
|
1055 |
ERR_add_error_data(2,"SSL alert number ",tmp);
|
|
sl@0
|
1056 |
s->shutdown|=SSL_RECEIVED_SHUTDOWN;
|
|
sl@0
|
1057 |
SSL_CTX_remove_session(s->ctx,s->session);
|
|
sl@0
|
1058 |
return(0);
|
|
sl@0
|
1059 |
}
|
|
sl@0
|
1060 |
else
|
|
sl@0
|
1061 |
{
|
|
sl@0
|
1062 |
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
sl@0
|
1063 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
|
|
sl@0
|
1064 |
goto f_err;
|
|
sl@0
|
1065 |
}
|
|
sl@0
|
1066 |
|
|
sl@0
|
1067 |
goto start;
|
|
sl@0
|
1068 |
}
|
|
sl@0
|
1069 |
|
|
sl@0
|
1070 |
if (s->shutdown & SSL_SENT_SHUTDOWN) /* but we have not received a shutdown */
|
|
sl@0
|
1071 |
{
|
|
sl@0
|
1072 |
s->rwstate=SSL_NOTHING;
|
|
sl@0
|
1073 |
rr->length=0;
|
|
sl@0
|
1074 |
return(0);
|
|
sl@0
|
1075 |
}
|
|
sl@0
|
1076 |
|
|
sl@0
|
1077 |
if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
|
|
sl@0
|
1078 |
{
|
|
sl@0
|
1079 |
/* 'Change Cipher Spec' is just a single byte, so we know
|
|
sl@0
|
1080 |
* exactly what the record payload has to look like */
|
|
sl@0
|
1081 |
if ( (rr->length != 1) || (rr->off != 0) ||
|
|
sl@0
|
1082 |
(rr->data[0] != SSL3_MT_CCS))
|
|
sl@0
|
1083 |
{
|
|
sl@0
|
1084 |
al=SSL_AD_ILLEGAL_PARAMETER;
|
|
sl@0
|
1085 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
|
|
sl@0
|
1086 |
goto f_err;
|
|
sl@0
|
1087 |
}
|
|
sl@0
|
1088 |
|
|
sl@0
|
1089 |
/* Check we have a cipher to change to */
|
|
sl@0
|
1090 |
if (s->s3->tmp.new_cipher == NULL)
|
|
sl@0
|
1091 |
{
|
|
sl@0
|
1092 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
1093 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_CCS_RECEIVED_EARLY);
|
|
sl@0
|
1094 |
goto f_err;
|
|
sl@0
|
1095 |
}
|
|
sl@0
|
1096 |
|
|
sl@0
|
1097 |
rr->length=0;
|
|
sl@0
|
1098 |
|
|
sl@0
|
1099 |
if (s->msg_callback)
|
|
sl@0
|
1100 |
s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC, rr->data, 1, s, s->msg_callback_arg);
|
|
sl@0
|
1101 |
|
|
sl@0
|
1102 |
s->s3->change_cipher_spec=1;
|
|
sl@0
|
1103 |
if (!ssl3_do_change_cipher_spec(s))
|
|
sl@0
|
1104 |
goto err;
|
|
sl@0
|
1105 |
else
|
|
sl@0
|
1106 |
goto start;
|
|
sl@0
|
1107 |
}
|
|
sl@0
|
1108 |
|
|
sl@0
|
1109 |
/* Unexpected handshake message (Client Hello, or protocol violation) */
|
|
sl@0
|
1110 |
if ((s->s3->handshake_fragment_len >= 4) && !s->in_handshake)
|
|
sl@0
|
1111 |
{
|
|
sl@0
|
1112 |
if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
|
|
sl@0
|
1113 |
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
|
|
sl@0
|
1114 |
{
|
|
sl@0
|
1115 |
#if 0 /* worked only because C operator preferences are not as expected (and
|
|
sl@0
|
1116 |
* because this is not really needed for clients except for detecting
|
|
sl@0
|
1117 |
* protocol violations): */
|
|
sl@0
|
1118 |
s->state=SSL_ST_BEFORE|(s->server)
|
|
sl@0
|
1119 |
?SSL_ST_ACCEPT
|
|
sl@0
|
1120 |
:SSL_ST_CONNECT;
|
|
sl@0
|
1121 |
#else
|
|
sl@0
|
1122 |
s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
|
|
sl@0
|
1123 |
#endif
|
|
sl@0
|
1124 |
s->new_session=1;
|
|
sl@0
|
1125 |
}
|
|
sl@0
|
1126 |
i=s->handshake_func(s);
|
|
sl@0
|
1127 |
if (i < 0) return(i);
|
|
sl@0
|
1128 |
if (i == 0)
|
|
sl@0
|
1129 |
{
|
|
sl@0
|
1130 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
|
|
sl@0
|
1131 |
return(-1);
|
|
sl@0
|
1132 |
}
|
|
sl@0
|
1133 |
|
|
sl@0
|
1134 |
if (!(s->mode & SSL_MODE_AUTO_RETRY))
|
|
sl@0
|
1135 |
{
|
|
sl@0
|
1136 |
if (s->s3->rbuf.left == 0) /* no read-ahead left? */
|
|
sl@0
|
1137 |
{
|
|
sl@0
|
1138 |
BIO *bio;
|
|
sl@0
|
1139 |
/* In the case where we try to read application data,
|
|
sl@0
|
1140 |
* but we trigger an SSL handshake, we return -1 with
|
|
sl@0
|
1141 |
* the retry option set. Otherwise renegotiation may
|
|
sl@0
|
1142 |
* cause nasty problems in the blocking world */
|
|
sl@0
|
1143 |
s->rwstate=SSL_READING;
|
|
sl@0
|
1144 |
bio=SSL_get_rbio(s);
|
|
sl@0
|
1145 |
BIO_clear_retry_flags(bio);
|
|
sl@0
|
1146 |
BIO_set_retry_read(bio);
|
|
sl@0
|
1147 |
return(-1);
|
|
sl@0
|
1148 |
}
|
|
sl@0
|
1149 |
}
|
|
sl@0
|
1150 |
goto start;
|
|
sl@0
|
1151 |
}
|
|
sl@0
|
1152 |
|
|
sl@0
|
1153 |
switch (rr->type)
|
|
sl@0
|
1154 |
{
|
|
sl@0
|
1155 |
default:
|
|
sl@0
|
1156 |
#ifndef OPENSSL_NO_TLS
|
|
sl@0
|
1157 |
/* TLS just ignores unknown message types */
|
|
sl@0
|
1158 |
if (s->version == TLS1_VERSION)
|
|
sl@0
|
1159 |
{
|
|
sl@0
|
1160 |
rr->length = 0;
|
|
sl@0
|
1161 |
goto start;
|
|
sl@0
|
1162 |
}
|
|
sl@0
|
1163 |
#endif
|
|
sl@0
|
1164 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
1165 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
|
|
sl@0
|
1166 |
goto f_err;
|
|
sl@0
|
1167 |
case SSL3_RT_CHANGE_CIPHER_SPEC:
|
|
sl@0
|
1168 |
case SSL3_RT_ALERT:
|
|
sl@0
|
1169 |
case SSL3_RT_HANDSHAKE:
|
|
sl@0
|
1170 |
/* we already handled all of these, with the possible exception
|
|
sl@0
|
1171 |
* of SSL3_RT_HANDSHAKE when s->in_handshake is set, but that
|
|
sl@0
|
1172 |
* should not happen when type != rr->type */
|
|
sl@0
|
1173 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
1174 |
SSLerr(SSL_F_SSL3_READ_BYTES,ERR_R_INTERNAL_ERROR);
|
|
sl@0
|
1175 |
goto f_err;
|
|
sl@0
|
1176 |
case SSL3_RT_APPLICATION_DATA:
|
|
sl@0
|
1177 |
/* At this point, we were expecting handshake data,
|
|
sl@0
|
1178 |
* but have application data. If the library was
|
|
sl@0
|
1179 |
* running inside ssl3_read() (i.e. in_read_app_data
|
|
sl@0
|
1180 |
* is set) and it makes sense to read application data
|
|
sl@0
|
1181 |
* at this point (session renegotiation not yet started),
|
|
sl@0
|
1182 |
* we will indulge it.
|
|
sl@0
|
1183 |
*/
|
|
sl@0
|
1184 |
if (s->s3->in_read_app_data &&
|
|
sl@0
|
1185 |
(s->s3->total_renegotiations != 0) &&
|
|
sl@0
|
1186 |
((
|
|
sl@0
|
1187 |
(s->state & SSL_ST_CONNECT) &&
|
|
sl@0
|
1188 |
(s->state >= SSL3_ST_CW_CLNT_HELLO_A) &&
|
|
sl@0
|
1189 |
(s->state <= SSL3_ST_CR_SRVR_HELLO_A)
|
|
sl@0
|
1190 |
) || (
|
|
sl@0
|
1191 |
(s->state & SSL_ST_ACCEPT) &&
|
|
sl@0
|
1192 |
(s->state <= SSL3_ST_SW_HELLO_REQ_A) &&
|
|
sl@0
|
1193 |
(s->state >= SSL3_ST_SR_CLNT_HELLO_A)
|
|
sl@0
|
1194 |
)
|
|
sl@0
|
1195 |
))
|
|
sl@0
|
1196 |
{
|
|
sl@0
|
1197 |
s->s3->in_read_app_data=2;
|
|
sl@0
|
1198 |
return(-1);
|
|
sl@0
|
1199 |
}
|
|
sl@0
|
1200 |
else
|
|
sl@0
|
1201 |
{
|
|
sl@0
|
1202 |
al=SSL_AD_UNEXPECTED_MESSAGE;
|
|
sl@0
|
1203 |
SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
|
|
sl@0
|
1204 |
goto f_err;
|
|
sl@0
|
1205 |
}
|
|
sl@0
|
1206 |
}
|
|
sl@0
|
1207 |
/* not reached */
|
|
sl@0
|
1208 |
|
|
sl@0
|
1209 |
f_err:
|
|
sl@0
|
1210 |
ssl3_send_alert(s,SSL3_AL_FATAL,al);
|
|
sl@0
|
1211 |
err:
|
|
sl@0
|
1212 |
return(-1);
|
|
sl@0
|
1213 |
}
|
|
sl@0
|
1214 |
|
|
sl@0
|
1215 |
int ssl3_do_change_cipher_spec(SSL *s)
|
|
sl@0
|
1216 |
{
|
|
sl@0
|
1217 |
int i;
|
|
sl@0
|
1218 |
const char *sender;
|
|
sl@0
|
1219 |
int slen;
|
|
sl@0
|
1220 |
|
|
sl@0
|
1221 |
if (s->state & SSL_ST_ACCEPT)
|
|
sl@0
|
1222 |
i=SSL3_CHANGE_CIPHER_SERVER_READ;
|
|
sl@0
|
1223 |
else
|
|
sl@0
|
1224 |
i=SSL3_CHANGE_CIPHER_CLIENT_READ;
|
|
sl@0
|
1225 |
|
|
sl@0
|
1226 |
if (s->s3->tmp.key_block == NULL)
|
|
sl@0
|
1227 |
{
|
|
sl@0
|
1228 |
s->session->cipher=s->s3->tmp.new_cipher;
|
|
sl@0
|
1229 |
if (!s->method->ssl3_enc->setup_key_block(s)) return(0);
|
|
sl@0
|
1230 |
}
|
|
sl@0
|
1231 |
|
|
sl@0
|
1232 |
if (!s->method->ssl3_enc->change_cipher_state(s,i))
|
|
sl@0
|
1233 |
return(0);
|
|
sl@0
|
1234 |
|
|
sl@0
|
1235 |
/* we have to record the message digest at
|
|
sl@0
|
1236 |
* this point so we can get it before we read
|
|
sl@0
|
1237 |
* the finished message */
|
|
sl@0
|
1238 |
if (s->state & SSL_ST_CONNECT)
|
|
sl@0
|
1239 |
{
|
|
sl@0
|
1240 |
sender=s->method->ssl3_enc->server_finished_label;
|
|
sl@0
|
1241 |
slen=s->method->ssl3_enc->server_finished_label_len;
|
|
sl@0
|
1242 |
}
|
|
sl@0
|
1243 |
else
|
|
sl@0
|
1244 |
{
|
|
sl@0
|
1245 |
sender=s->method->ssl3_enc->client_finished_label;
|
|
sl@0
|
1246 |
slen=s->method->ssl3_enc->client_finished_label_len;
|
|
sl@0
|
1247 |
}
|
|
sl@0
|
1248 |
|
|
sl@0
|
1249 |
s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
|
|
sl@0
|
1250 |
&(s->s3->finish_dgst1),
|
|
sl@0
|
1251 |
&(s->s3->finish_dgst2),
|
|
sl@0
|
1252 |
sender,slen,s->s3->tmp.peer_finish_md);
|
|
sl@0
|
1253 |
|
|
sl@0
|
1254 |
return(1);
|
|
sl@0
|
1255 |
}
|
|
sl@0
|
1256 |
|
|
sl@0
|
1257 |
void ssl3_send_alert(SSL *s, int level, int desc)
|
|
sl@0
|
1258 |
{
|
|
sl@0
|
1259 |
/* Map tls/ssl alert value to correct one */
|
|
sl@0
|
1260 |
desc=s->method->ssl3_enc->alert_value(desc);
|
|
sl@0
|
1261 |
if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION)
|
|
sl@0
|
1262 |
desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have protocol_version alerts */
|
|
sl@0
|
1263 |
if (desc < 0) return;
|
|
sl@0
|
1264 |
/* If a fatal one, remove from cache */
|
|
sl@0
|
1265 |
if ((level == 2) && (s->session != NULL))
|
|
sl@0
|
1266 |
SSL_CTX_remove_session(s->ctx,s->session);
|
|
sl@0
|
1267 |
|
|
sl@0
|
1268 |
s->s3->alert_dispatch=1;
|
|
sl@0
|
1269 |
s->s3->send_alert[0]=level;
|
|
sl@0
|
1270 |
s->s3->send_alert[1]=desc;
|
|
sl@0
|
1271 |
if (s->s3->wbuf.left == 0) /* data still being written out? */
|
|
sl@0
|
1272 |
s->method->ssl_dispatch_alert(s);
|
|
sl@0
|
1273 |
/* else data is still being written out, we will get written
|
|
sl@0
|
1274 |
* some time in the future */
|
|
sl@0
|
1275 |
}
|
|
sl@0
|
1276 |
|
|
sl@0
|
1277 |
int ssl3_dispatch_alert(SSL *s)
|
|
sl@0
|
1278 |
{
|
|
sl@0
|
1279 |
int i,j;
|
|
sl@0
|
1280 |
void (*cb)(const SSL *ssl,int type,int val)=NULL;
|
|
sl@0
|
1281 |
|
|
sl@0
|
1282 |
s->s3->alert_dispatch=0;
|
|
sl@0
|
1283 |
i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], 2, 0);
|
|
sl@0
|
1284 |
if (i <= 0)
|
|
sl@0
|
1285 |
{
|
|
sl@0
|
1286 |
s->s3->alert_dispatch=1;
|
|
sl@0
|
1287 |
}
|
|
sl@0
|
1288 |
else
|
|
sl@0
|
1289 |
{
|
|
sl@0
|
1290 |
/* Alert sent to BIO. If it is important, flush it now.
|
|
sl@0
|
1291 |
* If the message does not get sent due to non-blocking IO,
|
|
sl@0
|
1292 |
* we will not worry too much. */
|
|
sl@0
|
1293 |
if (s->s3->send_alert[0] == SSL3_AL_FATAL)
|
|
sl@0
|
1294 |
(void)BIO_flush(s->wbio);
|
|
sl@0
|
1295 |
|
|
sl@0
|
1296 |
if (s->msg_callback)
|
|
sl@0
|
1297 |
s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 2, s, s->msg_callback_arg);
|
|
sl@0
|
1298 |
|
|
sl@0
|
1299 |
if (s->info_callback != NULL)
|
|
sl@0
|
1300 |
cb=s->info_callback;
|
|
sl@0
|
1301 |
else if (s->ctx->info_callback != NULL)
|
|
sl@0
|
1302 |
cb=s->ctx->info_callback;
|
|
sl@0
|
1303 |
|
|
sl@0
|
1304 |
if (cb != NULL)
|
|
sl@0
|
1305 |
{
|
|
sl@0
|
1306 |
j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
|
|
sl@0
|
1307 |
cb(s,SSL_CB_WRITE_ALERT,j);
|
|
sl@0
|
1308 |
}
|
|
sl@0
|
1309 |
}
|
|
sl@0
|
1310 |
return(i);
|
|
sl@0
|
1311 |
}
|