mirror of
https://github.com/openssl/openssl.git
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245 lines
8.8 KiB
C
245 lines
8.8 KiB
C
/* ssl/record/ssl3_buffer.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 "../ssl_locl.h"
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#include "record_locl.h"
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void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, int n)
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{
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if(d != NULL)
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memcpy(b->buf, d, n);
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b->left = n;
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b->offset = 0;
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}
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void SSL3_BUFFER_release(SSL3_BUFFER *b)
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{
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if (b->buf != NULL)
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OPENSSL_free(b->buf);
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b->buf = NULL;
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}
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int ssl3_setup_read_buffer(SSL *s)
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{
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unsigned char *p;
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size_t len, align = 0, headerlen;
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SSL3_BUFFER *b;
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b = RECORD_LAYER_get_rbuf(&s->rlayer);
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if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
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headerlen = DTLS1_RT_HEADER_LENGTH;
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else
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headerlen = SSL3_RT_HEADER_LENGTH;
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#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
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align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
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#endif
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if (b->buf == NULL) {
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len = SSL3_RT_MAX_PLAIN_LENGTH
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+ SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
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if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) {
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s->s3->init_extra = 1;
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len += SSL3_RT_MAX_EXTRA;
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}
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#ifndef OPENSSL_NO_COMP
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if (ssl_allow_compression(s))
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len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
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#endif
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if ((p = OPENSSL_malloc(len)) == NULL)
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goto err;
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b->buf = p;
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b->len = len;
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}
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RECORD_LAYER_set_packet(&s->rlayer, &(b->buf[0]));
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return 1;
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err:
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SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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int ssl3_setup_write_buffer(SSL *s)
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{
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unsigned char *p;
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size_t len, align = 0, headerlen;
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SSL3_BUFFER *wb;
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wb = RECORD_LAYER_get_wbuf(&s->rlayer);
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if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
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headerlen = DTLS1_RT_HEADER_LENGTH + 1;
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else
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headerlen = SSL3_RT_HEADER_LENGTH;
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#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
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align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
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#endif
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if (wb->buf == NULL) {
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len = s->max_send_fragment
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+ SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
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#ifndef OPENSSL_NO_COMP
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if (ssl_allow_compression(s))
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len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
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#endif
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if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
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len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
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if ((p = OPENSSL_malloc(len)) == NULL)
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goto err;
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wb->buf = p;
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wb->len = len;
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}
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return 1;
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err:
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SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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int ssl3_setup_buffers(SSL *s)
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{
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if (!ssl3_setup_read_buffer(s))
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return 0;
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if (!ssl3_setup_write_buffer(s))
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return 0;
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return 1;
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}
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int ssl3_release_write_buffer(SSL *s)
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{
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SSL3_BUFFER *wb;
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wb = RECORD_LAYER_get_wbuf(&s->rlayer);
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if (wb->buf != NULL) {
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OPENSSL_free(wb->buf);
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wb->buf = NULL;
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}
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return 1;
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}
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int ssl3_release_read_buffer(SSL *s)
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{
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SSL3_BUFFER *b;
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b = RECORD_LAYER_get_rbuf(&s->rlayer);
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if (b->buf != NULL) {
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OPENSSL_free(b->buf);
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b->buf = NULL;
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}
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return 1;
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}
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