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|
/* $OpenBSD: ssl_both.c,v 1.18 2020/05/19 16:35:20 jsing Exp $ */
/* 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).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "bytestring.h"
/*
* Send s->internal->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
* SSL3_RT_CHANGE_CIPHER_SPEC).
*/
int
ssl3_do_write(SSL *s, int type)
{
int ret;
ret = ssl3_write_bytes(s, type, &s->internal->init_buf->data[s->internal->init_off],
s->internal->init_num);
if (ret < 0)
return (-1);
if (type == SSL3_RT_HANDSHAKE)
/*
* Should not be done for 'Hello Request's, but in that case
* we'll ignore the result anyway.
*/
tls1_transcript_record(s,
(unsigned char *)&s->internal->init_buf->data[s->internal->init_off], ret);
if (ret == s->internal->init_num) {
if (s->internal->msg_callback)
s->internal->msg_callback(1, s->version, type, s->internal->init_buf->data,
(size_t)(s->internal->init_off + s->internal->init_num), s,
s->internal->msg_callback_arg);
return (1);
}
s->internal->init_off += ret;
s->internal->init_num -= ret;
return (0);
}
int
ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
{
CBB cbb, finished;
int md_len;
memset(&cbb, 0, sizeof(cbb));
if (S3I(s)->hs.state == a) {
md_len = TLS1_FINISH_MAC_LENGTH;
OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
if (tls1_final_finish_mac(s, sender, slen,
S3I(s)->tmp.finish_md) != md_len)
return (0);
S3I(s)->tmp.finish_md_len = md_len;
/* Copy finished so we can use it for renegotiation checks. */
if (s->internal->type == SSL_ST_CONNECT) {
memcpy(S3I(s)->previous_client_finished,
S3I(s)->tmp.finish_md, md_len);
S3I(s)->previous_client_finished_len = md_len;
} else {
memcpy(S3I(s)->previous_server_finished,
S3I(s)->tmp.finish_md, md_len);
S3I(s)->previous_server_finished_len = md_len;
}
if (!ssl3_handshake_msg_start(s, &cbb, &finished,
SSL3_MT_FINISHED))
goto err;
if (!CBB_add_bytes(&finished, S3I(s)->tmp.finish_md, md_len))
goto err;
if (!ssl3_handshake_msg_finish(s, &cbb))
goto err;
S3I(s)->hs.state = b;
}
return (ssl3_handshake_write(s));
err:
CBB_cleanup(&cbb);
return (-1);
}
/*
* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
* so far.
*/
static void
ssl3_take_mac(SSL *s)
{
const char *sender;
int slen;
/*
* If no new cipher setup return immediately: other functions will
* set the appropriate error.
*/
if (S3I(s)->hs.new_cipher == NULL)
return;
if (S3I(s)->hs.state & SSL_ST_CONNECT) {
sender = TLS_MD_SERVER_FINISH_CONST;
slen = TLS_MD_SERVER_FINISH_CONST_SIZE;
} else {
sender = TLS_MD_CLIENT_FINISH_CONST;
slen = TLS_MD_CLIENT_FINISH_CONST_SIZE;
}
S3I(s)->tmp.peer_finish_md_len =
tls1_final_finish_mac(s, sender, slen,
S3I(s)->tmp.peer_finish_md);
}
int
ssl3_get_finished(SSL *s, int a, int b)
{
int al, ok, md_len;
long n;
CBS cbs;
/* should actually be 36+4 :-) */
n = ssl3_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
if (!ok)
return ((int)n);
/* If this occurs, we have missed a message */
if (!S3I(s)->change_cipher_spec) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
goto f_err;
}
S3I(s)->change_cipher_spec = 0;
md_len = TLS1_FINISH_MAC_LENGTH;
if (n < 0) {
al = SSL_AD_DECODE_ERROR;
SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
goto f_err;
}
CBS_init(&cbs, s->internal->init_msg, n);
if (S3I(s)->tmp.peer_finish_md_len != md_len ||
CBS_len(&cbs) != md_len) {
al = SSL_AD_DECODE_ERROR;
SSLerror(s, SSL_R_BAD_DIGEST_LENGTH);
goto f_err;
}
if (!CBS_mem_equal(&cbs, S3I(s)->tmp.peer_finish_md, CBS_len(&cbs))) {
al = SSL_AD_DECRYPT_ERROR;
SSLerror(s, SSL_R_DIGEST_CHECK_FAILED);
goto f_err;
}
/* Copy finished so we can use it for renegotiation checks. */
OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE);
if (s->internal->type == SSL_ST_ACCEPT) {
memcpy(S3I(s)->previous_client_finished,
S3I(s)->tmp.peer_finish_md, md_len);
S3I(s)->previous_client_finished_len = md_len;
} else {
memcpy(S3I(s)->previous_server_finished,
S3I(s)->tmp.peer_finish_md, md_len);
S3I(s)->previous_server_finished_len = md_len;
}
return (1);
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return (0);
}
/* for these 2 messages, we need to
* ssl->enc_read_ctx re-init
* ssl->s3->internal->read_sequence zero
* ssl->s3->internal->read_mac_secret re-init
* ssl->session->read_sym_enc assign
* ssl->session->read_hash assign
*/
int
ssl3_send_change_cipher_spec(SSL *s, int a, int b)
{
size_t outlen;
CBB cbb;
memset(&cbb, 0, sizeof(cbb));
if (S3I(s)->hs.state == a) {
if (!CBB_init_fixed(&cbb, s->internal->init_buf->data,
s->internal->init_buf->length))
goto err;
if (!CBB_add_u8(&cbb, SSL3_MT_CCS))
goto err;
if (!CBB_finish(&cbb, NULL, &outlen))
goto err;
if (outlen > INT_MAX)
goto err;
s->internal->init_num = (int)outlen;
s->internal->init_off = 0;
if (SSL_IS_DTLS(s)) {
D1I(s)->handshake_write_seq =
D1I(s)->next_handshake_write_seq;
dtls1_set_message_header_int(s, SSL3_MT_CCS, 0,
D1I(s)->handshake_write_seq, 0, 0);
dtls1_buffer_message(s, 1);
}
S3I(s)->hs.state = b;
}
/* SSL3_ST_CW_CHANGE_B */
return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC);
err:
CBB_cleanup(&cbb);
return -1;
}
static int
ssl3_add_cert(CBB *cbb, X509 *x)
{
unsigned char *data;
int cert_len;
int ret = 0;
CBB cert;
if ((cert_len = i2d_X509(x, NULL)) < 0)
goto err;
if (!CBB_add_u24_length_prefixed(cbb, &cert))
goto err;
if (!CBB_add_space(&cert, &data, cert_len))
goto err;
if (i2d_X509(x, &data) < 0)
goto err;
if (!CBB_flush(cbb))
goto err;
ret = 1;
err:
return (ret);
}
int
ssl3_output_cert_chain(SSL *s, CBB *cbb, CERT_PKEY *cpk)
{
X509_STORE_CTX *xs_ctx = NULL;
STACK_OF(X509) *chain;
CBB cert_list;
X509 *x;
int ret = 0;
int i;
if (!CBB_add_u24_length_prefixed(cbb, &cert_list))
goto err;
/* Send an empty certificate list when no certificate is available. */
if (cpk == NULL)
goto done;
if ((chain = cpk->chain) == NULL)
chain = s->ctx->extra_certs;
if (chain != NULL || (s->internal->mode & SSL_MODE_NO_AUTO_CHAIN)) {
if (!ssl3_add_cert(&cert_list, cpk->x509))
goto err;
} else {
if ((xs_ctx = X509_STORE_CTX_new()) == NULL)
goto err;
if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store,
cpk->x509, NULL)) {
SSLerror(s, ERR_R_X509_LIB);
goto err;
}
X509_verify_cert(xs_ctx);
ERR_clear_error();
chain = xs_ctx->chain;
}
for (i = 0; i < sk_X509_num(chain); i++) {
x = sk_X509_value(chain, i);
if (!ssl3_add_cert(&cert_list, x))
goto err;
}
done:
if (!CBB_flush(cbb))
goto err;
ret = 1;
err:
X509_STORE_CTX_free(xs_ctx);
return (ret);
}
/*
* Obtain handshake message of message type 'mt' (any if mt == -1),
* maximum acceptable body length 'max'.
* The first four bytes (msg_type and length) are read in state 'st1',
* the body is read in state 'stn'.
*/
long
ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
{
unsigned char *p;
uint32_t l;
long n;
int i, al;
CBS cbs;
uint8_t u8;
if (SSL_IS_DTLS(s))
return (dtls1_get_message(s, st1, stn, mt, max, ok));
if (S3I(s)->tmp.reuse_message) {
S3I(s)->tmp.reuse_message = 0;
if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
goto f_err;
}
*ok = 1;
s->internal->init_msg = s->internal->init_buf->data + 4;
s->internal->init_num = (int)S3I(s)->tmp.message_size;
return s->internal->init_num;
}
p = (unsigned char *)s->internal->init_buf->data;
/* s->internal->init_num < 4 */
if (S3I(s)->hs.state == st1) {
int skip_message;
do {
while (s->internal->init_num < 4) {
i = s->method->internal->ssl_read_bytes(s,
SSL3_RT_HANDSHAKE, &p[s->internal->init_num],
4 - s->internal->init_num, 0);
if (i <= 0) {
s->internal->rwstate = SSL_READING;
*ok = 0;
return i;
}
s->internal->init_num += i;
}
skip_message = 0;
if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) {
/*
* The server may always send 'Hello Request'
* messages -- we are doing a handshake anyway
* now, so ignore them if their format is
* correct. Does not count for 'Finished' MAC.
*/
if (p[1] == 0 && p[2] == 0 &&p[3] == 0) {
s->internal->init_num = 0;
skip_message = 1;
if (s->internal->msg_callback)
s->internal->msg_callback(0, s->version,
SSL3_RT_HANDSHAKE, p, 4, s,
s->internal->msg_callback_arg);
}
}
} while (skip_message);
/* s->internal->init_num == 4 */
if ((mt >= 0) && (*p != mt)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
goto f_err;
}
CBS_init(&cbs, p, 4);
if (!CBS_get_u8(&cbs, &u8) ||
!CBS_get_u24(&cbs, &l)) {
SSLerror(s, ERR_R_BUF_LIB);
goto err;
}
S3I(s)->tmp.message_type = u8;
if (l > (unsigned long)max) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE);
goto f_err;
}
if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) {
SSLerror(s, ERR_R_BUF_LIB);
goto err;
}
S3I(s)->tmp.message_size = l;
S3I(s)->hs.state = stn;
s->internal->init_msg = s->internal->init_buf->data + 4;
s->internal->init_num = 0;
}
/* next state (stn) */
p = s->internal->init_msg;
n = S3I(s)->tmp.message_size - s->internal->init_num;
while (n > 0) {
i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
&p[s->internal->init_num], n, 0);
if (i <= 0) {
s->internal->rwstate = SSL_READING;
*ok = 0;
return i;
}
s->internal->init_num += i;
n -= i;
}
/* If receiving Finished, record MAC of prior handshake messages for
* Finished verification. */
if (*s->internal->init_buf->data == SSL3_MT_FINISHED)
ssl3_take_mac(s);
/* Feed this message into MAC computation. */
if (s->internal->mac_packet) {
tls1_transcript_record(s, (unsigned char *)s->internal->init_buf->data,
s->internal->init_num + 4);
if (s->internal->msg_callback)
s->internal->msg_callback(0, s->version,
SSL3_RT_HANDSHAKE, s->internal->init_buf->data,
(size_t)s->internal->init_num + 4, s,
s->internal->msg_callback_arg);
}
*ok = 1;
return (s->internal->init_num);
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
err:
*ok = 0;
return (-1);
}
int
ssl_cert_type(X509 *x, EVP_PKEY *pkey)
{
EVP_PKEY *pk;
int ret = -1, i;
if (pkey == NULL)
pk = X509_get_pubkey(x);
else
pk = pkey;
if (pk == NULL)
goto err;
i = pk->type;
if (i == EVP_PKEY_RSA) {
ret = SSL_PKEY_RSA;
} else if (i == EVP_PKEY_EC) {
ret = SSL_PKEY_ECC;
} else if (i == NID_id_GostR3410_2001 ||
i == NID_id_GostR3410_2001_cc) {
ret = SSL_PKEY_GOST01;
}
err:
if (!pkey)
EVP_PKEY_free(pk);
return (ret);
}
int
ssl_verify_alarm_type(long type)
{
int al;
switch (type) {
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
case X509_V_ERR_UNABLE_TO_GET_CRL:
case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
al = SSL_AD_UNKNOWN_CA;
break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
case X509_V_ERR_CERT_NOT_YET_VALID:
case X509_V_ERR_CRL_NOT_YET_VALID:
case X509_V_ERR_CERT_UNTRUSTED:
case X509_V_ERR_CERT_REJECTED:
al = SSL_AD_BAD_CERTIFICATE;
break;
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
al = SSL_AD_DECRYPT_ERROR;
break;
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_CRL_HAS_EXPIRED:
al = SSL_AD_CERTIFICATE_EXPIRED;
break;
case X509_V_ERR_CERT_REVOKED:
al = SSL_AD_CERTIFICATE_REVOKED;
break;
case X509_V_ERR_OUT_OF_MEM:
al = SSL_AD_INTERNAL_ERROR;
break;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
case X509_V_ERR_INVALID_CA:
al = SSL_AD_UNKNOWN_CA;
break;
case X509_V_ERR_APPLICATION_VERIFICATION:
al = SSL_AD_HANDSHAKE_FAILURE;
break;
case X509_V_ERR_INVALID_PURPOSE:
al = SSL_AD_UNSUPPORTED_CERTIFICATE;
break;
default:
al = SSL_AD_CERTIFICATE_UNKNOWN;
break;
}
return (al);
}
int
ssl3_setup_init_buffer(SSL *s)
{
BUF_MEM *buf = NULL;
if (s->internal->init_buf != NULL)
return (1);
if ((buf = BUF_MEM_new()) == NULL)
goto err;
if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH))
goto err;
s->internal->init_buf = buf;
return (1);
err:
BUF_MEM_free(buf);
return (0);
}
int
ssl3_setup_read_buffer(SSL *s)
{
unsigned char *p;
size_t len, align, headerlen;
if (SSL_IS_DTLS(s))
headerlen = DTLS1_RT_HEADER_LENGTH;
else
headerlen = SSL3_RT_HEADER_LENGTH;
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
if (S3I(s)->rbuf.buf == NULL) {
len = SSL3_RT_MAX_PLAIN_LENGTH +
SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
if ((p = calloc(1, len)) == NULL)
goto err;
S3I(s)->rbuf.buf = p;
S3I(s)->rbuf.len = len;
}
s->internal->packet = &(S3I(s)->rbuf.buf[0]);
return 1;
err:
SSLerror(s, ERR_R_MALLOC_FAILURE);
return 0;
}
int
ssl3_setup_write_buffer(SSL *s)
{
unsigned char *p;
size_t len, align, headerlen;
if (SSL_IS_DTLS(s))
headerlen = DTLS1_RT_HEADER_LENGTH + 1;
else
headerlen = SSL3_RT_HEADER_LENGTH;
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
if (S3I(s)->wbuf.buf == NULL) {
len = s->max_send_fragment +
SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
len += headerlen + align +
SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
if ((p = calloc(1, len)) == NULL)
goto err;
S3I(s)->wbuf.buf = p;
S3I(s)->wbuf.len = len;
}
return 1;
err:
SSLerror(s, 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)
{
free(S3I(s)->wbuf.buf);
S3I(s)->wbuf.buf = NULL;
return 1;
}
int
ssl3_release_read_buffer(SSL *s)
{
free(S3I(s)->rbuf.buf);
S3I(s)->rbuf.buf = NULL;
return 1;
}
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