2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
120 #include "ssl_locl.h"
121 #include <openssl/buffer.h>
122 #include <openssl/rand.h>
123 #include <openssl/objects.h>
124 #include <openssl/evp.h>
125 #include <openssl/x509.h>
128 * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
129 * SSL3_RT_CHANGE_CIPHER_SPEC)
131 int ssl3_do_write(SSL *s, int type)
135 ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
139 if (type == SSL3_RT_HANDSHAKE)
141 * should not be done for 'Hello Request's, but in that case we'll
142 * ignore the result anyway
144 ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off],
147 if (ret == s->init_num) {
149 s->msg_callback(1, s->version, type, s->init_buf->data,
150 (size_t)(s->init_off + s->init_num), s,
151 s->msg_callback_arg);
159 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
166 p = ssl_handshake_start(s);
168 i = s->method->ssl3_enc->final_finish_mac(s,
170 s->s3->tmp.finish_md);
173 s->s3->tmp.finish_md_len = i;
174 memcpy(p, s->s3->tmp.finish_md, i);
178 * Copy the finished so we can use it for renegotiation checks
180 if (s->type == SSL_ST_CONNECT) {
181 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
182 memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
183 s->s3->previous_client_finished_len = i;
185 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
186 memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
187 s->s3->previous_server_finished_len = i;
190 #ifdef OPENSSL_SYS_WIN16
192 * MSVC 1.5 does not clear the top bytes of the word unless I do
197 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
202 return ssl_do_write(s);
205 #ifndef OPENSSL_NO_NEXTPROTONEG
207 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
210 static void ssl3_take_mac(SSL *s)
215 * If no new cipher setup return immediately: other functions will set
216 * the appropriate error.
218 if (s->s3->tmp.new_cipher == NULL)
220 if (s->state & SSL_ST_CONNECT) {
221 sender = s->method->ssl3_enc->server_finished_label;
222 slen = s->method->ssl3_enc->server_finished_label_len;
224 sender = s->method->ssl3_enc->client_finished_label;
225 slen = s->method->ssl3_enc->client_finished_label_len;
228 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
231 s->s3->tmp.peer_finish_md);
235 int ssl3_get_finished(SSL *s, int a, int b)
241 #ifdef OPENSSL_NO_NEXTPROTONEG
243 * the mac has already been generated when we received the change cipher
244 * spec message and is in s->s3->tmp.peer_finish_md
248 /* 64 argument should actually be 36+4 :-) */
249 n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
254 /* If this occurs, we have missed a message */
255 if (!s->s3->change_cipher_spec) {
256 al = SSL_AD_UNEXPECTED_MESSAGE;
257 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
260 s->s3->change_cipher_spec = 0;
262 p = (unsigned char *)s->init_msg;
263 i = s->s3->tmp.peer_finish_md_len;
266 al = SSL_AD_DECODE_ERROR;
267 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
271 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) {
272 al = SSL_AD_DECRYPT_ERROR;
273 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
278 * Copy the finished so we can use it for renegotiation checks
280 if (s->type == SSL_ST_ACCEPT) {
281 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
282 memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
283 s->s3->previous_client_finished_len = i;
285 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
286 memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
287 s->s3->previous_server_finished_len = i;
292 ssl3_send_alert(s, SSL3_AL_FATAL, al);
297 * for these 2 messages, we need to
298 * ssl->enc_read_ctx re-init
299 * ssl->s3->read_sequence zero
300 * ssl->s3->read_mac_secret re-init
301 * ssl->session->read_sym_enc assign
302 * ssl->session->read_compression assign
303 * ssl->session->read_hash assign
305 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
310 p = (unsigned char *)s->init_buf->data;
318 /* SSL3_ST_CW_CHANGE_B */
319 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC));
322 unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
325 unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
327 if (!ssl_add_cert_chain(s, cpk, &l))
330 l -= 3 + SSL_HM_HEADER_LENGTH(s);
331 p = ssl_handshake_start(s);
334 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
335 return l + SSL_HM_HEADER_LENGTH(s);
339 * Obtain handshake message of message type 'mt' (any if mt == -1), maximum
340 * acceptable body length 'max'. The first four bytes (msg_type and length)
341 * are read in state 'st1', the body is read in state 'stn'.
343 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
350 if (s->s3->tmp.reuse_message) {
351 s->s3->tmp.reuse_message = 0;
352 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) {
353 al = SSL_AD_UNEXPECTED_MESSAGE;
354 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
359 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
360 s->init_num = (int)s->s3->tmp.message_size;
364 p = (unsigned char *)s->init_buf->data;
366 if (s->state == st1) { /* s->init_num < SSL3_HM_HEADER_LENGTH */
370 while (s->init_num < SSL3_HM_HEADER_LENGTH) {
371 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
373 SSL3_HM_HEADER_LENGTH -
376 s->rwstate = SSL_READING;
385 if (p[0] == SSL3_MT_HELLO_REQUEST)
387 * The server may always send 'Hello Request' messages --
388 * we are doing a handshake anyway now, so ignore them if
389 * their format is correct. Does not count for 'Finished'
392 if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
397 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
398 p, SSL3_HM_HEADER_LENGTH, s,
399 s->msg_callback_arg);
402 while (skip_message);
404 /* s->init_num == SSL3_HM_HEADER_LENGTH */
406 if ((mt >= 0) && (*p != mt)) {
407 al = SSL_AD_UNEXPECTED_MESSAGE;
408 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
412 s->s3->tmp.message_type = *(p++);
415 if (l > (unsigned long)max) {
416 al = SSL_AD_ILLEGAL_PARAMETER;
417 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
421 * Make buffer slightly larger than message length as a precaution
422 * against small OOB reads e.g. CVE-2016-6306
425 && !BUF_MEM_grow_clean(s->init_buf,
426 (int)l + SSL3_HM_HEADER_LENGTH + 16)) {
427 SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB);
430 s->s3->tmp.message_size = l;
433 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
437 /* next state (stn) */
439 n = s->s3->tmp.message_size - s->init_num;
441 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num],
444 s->rwstate = SSL_READING;
452 #ifndef OPENSSL_NO_NEXTPROTONEG
454 * If receiving Finished, record MAC of prior handshake messages for
455 * Finished verification.
457 if (*s->init_buf->data == SSL3_MT_FINISHED)
461 /* Feed this message into MAC computation. */
462 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
463 s->init_num + SSL3_HM_HEADER_LENGTH);
465 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
466 (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
467 s->msg_callback_arg);
471 ssl3_send_alert(s, SSL3_AL_FATAL, al);
477 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
483 pk = X509_get_pubkey(x);
490 if (i == EVP_PKEY_RSA) {
491 ret = SSL_PKEY_RSA_ENC;
492 } else if (i == EVP_PKEY_DSA) {
493 ret = SSL_PKEY_DSA_SIGN;
495 #ifndef OPENSSL_NO_EC
496 else if (i == EVP_PKEY_EC) {
500 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) {
501 ret = SSL_PKEY_GOST94;
502 } else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) {
503 ret = SSL_PKEY_GOST01;
504 } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) {
506 * For DH two cases: DH certificate signed with RSA and DH
507 * certificate signed with DSA.
509 i = X509_certificate_type(x, pk);
511 ret = SSL_PKEY_DH_RSA;
512 else if (i & EVP_PKS_DSA)
513 ret = SSL_PKEY_DH_DSA;
522 int ssl_verify_alarm_type(long type)
527 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
528 case X509_V_ERR_UNABLE_TO_GET_CRL:
529 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
530 al = SSL_AD_UNKNOWN_CA;
532 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
533 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
534 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
535 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
536 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
537 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
538 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
539 case X509_V_ERR_CERT_NOT_YET_VALID:
540 case X509_V_ERR_CRL_NOT_YET_VALID:
541 case X509_V_ERR_CERT_UNTRUSTED:
542 case X509_V_ERR_CERT_REJECTED:
543 case X509_V_ERR_HOSTNAME_MISMATCH:
544 case X509_V_ERR_EMAIL_MISMATCH:
545 case X509_V_ERR_IP_ADDRESS_MISMATCH:
546 al = SSL_AD_BAD_CERTIFICATE;
548 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
549 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
550 al = SSL_AD_DECRYPT_ERROR;
552 case X509_V_ERR_CERT_HAS_EXPIRED:
553 case X509_V_ERR_CRL_HAS_EXPIRED:
554 al = SSL_AD_CERTIFICATE_EXPIRED;
556 case X509_V_ERR_CERT_REVOKED:
557 al = SSL_AD_CERTIFICATE_REVOKED;
559 case X509_V_ERR_UNSPECIFIED:
560 case X509_V_ERR_OUT_OF_MEM:
561 case X509_V_ERR_INVALID_CALL:
562 case X509_V_ERR_STORE_LOOKUP:
563 al = SSL_AD_INTERNAL_ERROR;
565 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
566 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
567 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
568 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
569 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
570 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
571 case X509_V_ERR_INVALID_CA:
572 al = SSL_AD_UNKNOWN_CA;
574 case X509_V_ERR_APPLICATION_VERIFICATION:
575 al = SSL_AD_HANDSHAKE_FAILURE;
577 case X509_V_ERR_INVALID_PURPOSE:
578 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
581 al = SSL_AD_CERTIFICATE_UNKNOWN;
587 #ifndef OPENSSL_NO_BUF_FREELISTS
589 * On some platforms, malloc() performance is bad enough that you can't just
590 * free() and malloc() buffers all the time, so we need to use freelists from
591 * unused buffers. Currently, each freelist holds memory chunks of only a
592 * given size (list->chunklen); other sized chunks are freed and malloced.
593 * This doesn't help much if you're using many different SSL option settings
594 * with a given context. (The options affecting buffer size are
595 * max_send_fragment, read buffer vs write buffer,
596 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
597 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
598 * possible size is not an option, since max_send_fragment can take on many
601 * If you are on a platform with a slow malloc(), and you're using SSL
602 * connections with many different settings for these options, and you need to
603 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
604 * - Link against a faster malloc implementation.
605 * - Use a separate SSL_CTX for each option set.
606 * - Improve this code.
608 static void *freelist_extract(SSL_CTX *ctx, int for_read, int sz)
610 SSL3_BUF_FREELIST *list;
611 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
614 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
615 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
616 if (list != NULL && sz == (int)list->chunklen)
619 list->head = ent->next;
621 if (--list->len == 0)
624 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
626 result = OPENSSL_malloc(sz);
630 static void freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
632 SSL3_BUF_FREELIST *list;
633 SSL3_BUF_FREELIST_ENTRY *ent;
635 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
636 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
638 (sz == list->chunklen || list->chunklen == 0) &&
639 list->len < ctx->freelist_max_len && sz >= sizeof(*ent)) {
642 ent->next = list->head;
648 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
653 # define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
654 # define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
657 int ssl3_setup_read_buffer(SSL *s)
660 size_t len, align = 0, headerlen;
663 headerlen = DTLS1_RT_HEADER_LENGTH;
665 headerlen = SSL3_RT_HEADER_LENGTH;
667 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
668 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
671 if (s->s3->rbuf.buf == NULL) {
672 len = SSL3_RT_MAX_PLAIN_LENGTH
673 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
674 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) {
675 s->s3->init_extra = 1;
676 len += SSL3_RT_MAX_EXTRA;
678 #ifndef OPENSSL_NO_COMP
679 if (!(s->options & SSL_OP_NO_COMPRESSION))
680 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
682 if ((p = freelist_extract(s->ctx, 1, len)) == NULL)
685 s->s3->rbuf.len = len;
688 s->packet = &(s->s3->rbuf.buf[0]);
692 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
696 int ssl3_setup_write_buffer(SSL *s)
699 size_t len, align = 0, headerlen;
702 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
704 headerlen = SSL3_RT_HEADER_LENGTH;
706 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
707 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
710 if (s->s3->wbuf.buf == NULL) {
711 len = s->max_send_fragment
712 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
713 #ifndef OPENSSL_NO_COMP
714 if (!(s->options & SSL_OP_NO_COMPRESSION))
715 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
717 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
718 len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
720 if ((p = freelist_extract(s->ctx, 0, len)) == NULL)
723 s->s3->wbuf.len = len;
729 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
733 int ssl3_setup_buffers(SSL *s)
735 if (!ssl3_setup_read_buffer(s))
737 if (!ssl3_setup_write_buffer(s))
742 int ssl3_release_write_buffer(SSL *s)
744 if (s->s3->wbuf.buf != NULL) {
745 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
746 s->s3->wbuf.buf = NULL;
751 int ssl3_release_read_buffer(SSL *s)
753 if (s->s3->rbuf.buf != NULL) {
754 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
755 s->s3->rbuf.buf = NULL;