1c9ed1d8a7
Suggested by David Benjamin Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Viktor Dukhovni <openssl-users@dukhovni.org> MR: #1520
248 lines
8.6 KiB
C
248 lines
8.6 KiB
C
/* ssl/record/ssl3_buffer.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@openssl.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include "../ssl_locl.h"
|
|
#include "record_locl.h"
|
|
|
|
void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, int n)
|
|
{
|
|
if (d != NULL)
|
|
memcpy(b->buf, d, n);
|
|
b->left = n;
|
|
b->offset = 0;
|
|
}
|
|
|
|
/*
|
|
* Clear the contents of an SSL3_BUFFER but retain any memory allocated
|
|
*/
|
|
void SSL3_BUFFER_clear(SSL3_BUFFER *b)
|
|
{
|
|
unsigned char *buf = b->buf;
|
|
size_t len = b->len;
|
|
|
|
memset(b, 0, sizeof(*b));
|
|
b->buf = buf;
|
|
b->len = len;
|
|
}
|
|
|
|
void SSL3_BUFFER_release(SSL3_BUFFER *b)
|
|
{
|
|
OPENSSL_free(b->buf);
|
|
b->buf = NULL;
|
|
}
|
|
|
|
int ssl3_setup_read_buffer(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
size_t len, align = 0, headerlen;
|
|
SSL3_BUFFER *b;
|
|
|
|
b = RECORD_LAYER_get_rbuf(&s->rlayer);
|
|
|
|
if (SSL_IS_DTLS(s))
|
|
headerlen = DTLS1_RT_HEADER_LENGTH;
|
|
else
|
|
headerlen = SSL3_RT_HEADER_LENGTH;
|
|
|
|
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
|
|
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
|
|
#endif
|
|
|
|
if (b->buf == NULL) {
|
|
len = SSL3_RT_MAX_PLAIN_LENGTH
|
|
+ SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
|
|
#ifndef OPENSSL_NO_COMP
|
|
if (ssl_allow_compression(s))
|
|
len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
|
|
#endif
|
|
if ((p = OPENSSL_malloc(len)) == NULL)
|
|
goto err;
|
|
b->buf = p;
|
|
b->len = len;
|
|
}
|
|
|
|
RECORD_LAYER_set_packet(&s->rlayer, &(b->buf[0]));
|
|
return 1;
|
|
|
|
err:
|
|
SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
int ssl3_setup_write_buffer(SSL *s)
|
|
{
|
|
unsigned char *p;
|
|
size_t len, align = 0, headerlen;
|
|
SSL3_BUFFER *wb;
|
|
|
|
wb = RECORD_LAYER_get_wbuf(&s->rlayer);
|
|
|
|
if (SSL_IS_DTLS(s))
|
|
headerlen = DTLS1_RT_HEADER_LENGTH + 1;
|
|
else
|
|
headerlen = SSL3_RT_HEADER_LENGTH;
|
|
|
|
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
|
|
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
|
|
#endif
|
|
|
|
if (wb->buf == NULL) {
|
|
len = s->max_send_fragment
|
|
+ SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
|
|
#ifndef OPENSSL_NO_COMP
|
|
if (ssl_allow_compression(s))
|
|
len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
|
|
#endif
|
|
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
|
|
len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
|
|
|
|
if ((p = OPENSSL_malloc(len)) == NULL)
|
|
goto err;
|
|
wb->buf = p;
|
|
wb->len = len;
|
|
}
|
|
|
|
return 1;
|
|
|
|
err:
|
|
SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
int ssl3_setup_buffers(SSL *s)
|
|
{
|
|
if (!ssl3_setup_read_buffer(s))
|
|
return 0;
|
|
if (!ssl3_setup_write_buffer(s))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int ssl3_release_write_buffer(SSL *s)
|
|
{
|
|
SSL3_BUFFER *wb;
|
|
|
|
wb = RECORD_LAYER_get_wbuf(&s->rlayer);
|
|
|
|
OPENSSL_free(wb->buf);
|
|
wb->buf = NULL;
|
|
return 1;
|
|
}
|
|
|
|
int ssl3_release_read_buffer(SSL *s)
|
|
{
|
|
SSL3_BUFFER *b;
|
|
|
|
b = RECORD_LAYER_get_rbuf(&s->rlayer);
|
|
OPENSSL_free(b->buf);
|
|
b->buf = NULL;
|
|
return 1;
|
|
}
|