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)
161 unsigned char *p, *d;
166 d = (unsigned char *)s->init_buf->data;
169 i = s->method->ssl3_enc->final_finish_mac(s,
171 s->s3->tmp.finish_md);
174 s->s3->tmp.finish_md_len = i;
175 memcpy(p, s->s3->tmp.finish_md, i);
180 * Copy the finished so we can use it for renegotiation checks
182 if (s->type == SSL_ST_CONNECT) {
183 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
184 memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
185 s->s3->previous_client_finished_len = i;
187 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
188 memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
189 s->s3->previous_server_finished_len = i;
192 #ifdef OPENSSL_SYS_WIN16
194 * MSVC 1.5 does not clear the top bytes of the word unless I do
200 *(d++) = SSL3_MT_FINISHED;
202 s->init_num = (int)l + 4;
208 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
209 return (ssl3_do_write(s, SSL3_RT_HANDSHAKE));
212 #ifndef OPENSSL_NO_NEXTPROTONEG
214 * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
217 static void ssl3_take_mac(SSL *s)
222 * If no new cipher setup return immediately: other functions will set
223 * the appropriate error.
225 if (s->s3->tmp.new_cipher == NULL)
227 if (s->state & SSL_ST_CONNECT) {
228 sender = s->method->ssl3_enc->server_finished_label;
229 slen = s->method->ssl3_enc->server_finished_label_len;
231 sender = s->method->ssl3_enc->client_finished_label;
232 slen = s->method->ssl3_enc->client_finished_label_len;
235 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
238 s->s3->tmp.peer_finish_md);
242 int ssl3_get_finished(SSL *s, int a, int b)
248 #ifdef OPENSSL_NO_NEXTPROTONEG
250 * the mac has already been generated when we received the change cipher
251 * spec message and is in s->s3->tmp.peer_finish_md.
255 /* 64 argument should actually be 36+4 :-) */
256 n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok);
261 /* If this occurs, we have missed a message */
262 if (!s->s3->change_cipher_spec) {
263 al = SSL_AD_UNEXPECTED_MESSAGE;
264 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
267 s->s3->change_cipher_spec = 0;
269 p = (unsigned char *)s->init_msg;
270 i = s->s3->tmp.peer_finish_md_len;
273 al = SSL_AD_DECODE_ERROR;
274 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
278 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) {
279 al = SSL_AD_DECRYPT_ERROR;
280 SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
285 * Copy the finished so we can use it for renegotiation checks
287 if (s->type == SSL_ST_ACCEPT) {
288 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
289 memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
290 s->s3->previous_client_finished_len = i;
292 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
293 memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
294 s->s3->previous_server_finished_len = i;
299 ssl3_send_alert(s, SSL3_AL_FATAL, al);
304 * for these 2 messages, we need to
305 * ssl->enc_read_ctx re-init
306 * ssl->s3->read_sequence zero
307 * ssl->s3->read_mac_secret re-init
308 * ssl->session->read_sym_enc assign
309 * ssl->session->read_compression assign
310 * ssl->session->read_hash assign
312 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
317 p = (unsigned char *)s->init_buf->data;
325 /* SSL3_ST_CW_CHANGE_B */
326 return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC));
329 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
334 n = i2d_X509(x, NULL);
335 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
336 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
339 p = (unsigned char *)&(buf->data[*l]);
347 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
355 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
360 /* TLSv1 sends a chain with nothing in it, instead of an alert */
362 if (!BUF_MEM_grow_clean(buf, 10)) {
363 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_BUF_LIB);
368 if (ssl3_add_cert_to_buf(buf, &l, x))
371 X509_STORE_CTX xs_ctx;
373 if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, x, NULL)) {
374 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_X509_LIB);
377 X509_verify_cert(&xs_ctx);
378 /* Don't leave errors in the queue */
380 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
381 x = sk_X509_value(xs_ctx.chain, i);
383 if (ssl3_add_cert_to_buf(buf, &l, x)) {
384 X509_STORE_CTX_cleanup(&xs_ctx);
388 X509_STORE_CTX_cleanup(&xs_ctx);
391 /* Thawte special :-) */
392 for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) {
393 x = sk_X509_value(s->ctx->extra_certs, i);
394 if (ssl3_add_cert_to_buf(buf, &l, x))
399 p = (unsigned char *)&(buf->data[4]);
402 p = (unsigned char *)&(buf->data[0]);
403 *(p++) = SSL3_MT_CERTIFICATE;
410 * Obtain handshake message of message type 'mt' (any if mt == -1), maximum
411 * acceptable body length 'max'. The first four bytes (msg_type and length)
412 * are read in state 'st1', the body is read in state 'stn'.
414 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
421 if (s->s3->tmp.reuse_message) {
422 s->s3->tmp.reuse_message = 0;
423 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) {
424 al = SSL_AD_UNEXPECTED_MESSAGE;
425 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
430 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
431 s->init_num = (int)s->s3->tmp.message_size;
435 p = (unsigned char *)s->init_buf->data;
437 if (s->state == st1) { /* s->init_num < SSL3_HM_HEADER_LENGTH */
441 while (s->init_num < SSL3_HM_HEADER_LENGTH) {
442 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
444 SSL3_HM_HEADER_LENGTH -
447 s->rwstate = SSL_READING;
456 if (p[0] == SSL3_MT_HELLO_REQUEST)
458 * The server may always send 'Hello Request' messages --
459 * we are doing a handshake anyway now, so ignore them if
460 * their format is correct. Does not count for 'Finished'
463 if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
468 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
469 p, SSL3_HM_HEADER_LENGTH, s,
470 s->msg_callback_arg);
473 while (skip_message);
475 /* s->init_num == SSL3_HM_HEADER_LENGTH */
477 if ((mt >= 0) && (*p != mt)) {
478 al = SSL_AD_UNEXPECTED_MESSAGE;
479 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
482 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
483 (st1 == SSL3_ST_SR_CERT_A) && (stn == SSL3_ST_SR_CERT_B)) {
485 * At this point we have got an MS SGC second client hello (maybe
486 * we should always allow the client to start a new handshake?).
487 * We need to restart the mac. Don't increment
488 * {num,total}_renegotiations because we have not completed the
491 ssl3_init_finished_mac(s);
494 s->s3->tmp.message_type = *(p++);
497 if (l > (unsigned long)max) {
498 al = SSL_AD_ILLEGAL_PARAMETER;
499 SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE);
503 * Make buffer slightly larger than message length as a precaution
504 * against small OOB reads e.g. CVE-2016-6306
507 && !BUF_MEM_grow_clean(s->init_buf,
508 (int)l + SSL3_HM_HEADER_LENGTH + 16)) {
509 SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB);
512 s->s3->tmp.message_size = l;
515 s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
519 /* next state (stn) */
521 n = s->s3->tmp.message_size - s->init_num;
523 i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num],
526 s->rwstate = SSL_READING;
534 #ifndef OPENSSL_NO_NEXTPROTONEG
536 * If receiving Finished, record MAC of prior handshake messages for
537 * Finished verification.
539 if (*s->init_buf->data == SSL3_MT_FINISHED)
543 /* Feed this message into MAC computation. */
544 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
545 s->init_num + SSL3_HM_HEADER_LENGTH);
547 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
548 (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
549 s->msg_callback_arg);
553 ssl3_send_alert(s, SSL3_AL_FATAL, al);
559 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
565 pk = X509_get_pubkey(x);
572 if (i == EVP_PKEY_RSA) {
573 ret = SSL_PKEY_RSA_ENC;
574 } else if (i == EVP_PKEY_DSA) {
575 ret = SSL_PKEY_DSA_SIGN;
577 #ifndef OPENSSL_NO_EC
578 else if (i == EVP_PKEY_EC) {
582 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) {
583 ret = SSL_PKEY_GOST94;
584 } else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) {
585 ret = SSL_PKEY_GOST01;
593 int ssl_verify_alarm_type(long type)
598 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
599 case X509_V_ERR_UNABLE_TO_GET_CRL:
600 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
601 al = SSL_AD_UNKNOWN_CA;
603 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
604 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
605 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
606 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
607 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
608 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
609 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
610 case X509_V_ERR_CERT_NOT_YET_VALID:
611 case X509_V_ERR_CRL_NOT_YET_VALID:
612 case X509_V_ERR_CERT_UNTRUSTED:
613 case X509_V_ERR_CERT_REJECTED:
614 al = SSL_AD_BAD_CERTIFICATE;
616 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
617 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
618 al = SSL_AD_DECRYPT_ERROR;
620 case X509_V_ERR_CERT_HAS_EXPIRED:
621 case X509_V_ERR_CRL_HAS_EXPIRED:
622 al = SSL_AD_CERTIFICATE_EXPIRED;
624 case X509_V_ERR_CERT_REVOKED:
625 al = SSL_AD_CERTIFICATE_REVOKED;
627 case X509_V_ERR_UNSPECIFIED:
628 case X509_V_ERR_OUT_OF_MEM:
629 case X509_V_ERR_INVALID_CALL:
630 case X509_V_ERR_STORE_LOOKUP:
631 al = SSL_AD_INTERNAL_ERROR;
633 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
634 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
635 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
636 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
637 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
638 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
639 case X509_V_ERR_INVALID_CA:
640 al = SSL_AD_UNKNOWN_CA;
642 case X509_V_ERR_APPLICATION_VERIFICATION:
643 al = SSL_AD_HANDSHAKE_FAILURE;
645 case X509_V_ERR_INVALID_PURPOSE:
646 al = SSL_AD_UNSUPPORTED_CERTIFICATE;
649 al = SSL_AD_CERTIFICATE_UNKNOWN;
655 #ifndef OPENSSL_NO_BUF_FREELISTS
657 * On some platforms, malloc() performance is bad enough that you can't just
658 * free() and malloc() buffers all the time, so we need to use freelists from
659 * unused buffers. Currently, each freelist holds memory chunks of only a
660 * given size (list->chunklen); other sized chunks are freed and malloced.
661 * This doesn't help much if you're using many different SSL option settings
662 * with a given context. (The options affecting buffer size are
663 * max_send_fragment, read buffer vs write buffer,
664 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
665 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
666 * possible size is not an option, since max_send_fragment can take on many
669 * If you are on a platform with a slow malloc(), and you're using SSL
670 * connections with many different settings for these options, and you need to
671 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
672 * - Link against a faster malloc implementation.
673 * - Use a separate SSL_CTX for each option set.
674 * - Improve this code.
676 static void *freelist_extract(SSL_CTX *ctx, int for_read, int sz)
678 SSL3_BUF_FREELIST *list;
679 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
682 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
683 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
684 if (list != NULL && sz == (int)list->chunklen)
687 list->head = ent->next;
689 if (--list->len == 0)
692 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
694 result = OPENSSL_malloc(sz);
698 static void freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
700 SSL3_BUF_FREELIST *list;
701 SSL3_BUF_FREELIST_ENTRY *ent;
703 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
704 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
706 (sz == list->chunklen || list->chunklen == 0) &&
707 list->len < ctx->freelist_max_len && sz >= sizeof(*ent)) {
710 ent->next = list->head;
716 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
721 # define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
722 # define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
725 int ssl3_setup_read_buffer(SSL *s)
728 size_t len, align = 0, headerlen;
730 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
731 headerlen = DTLS1_RT_HEADER_LENGTH;
733 headerlen = SSL3_RT_HEADER_LENGTH;
735 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
736 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
739 if (s->s3->rbuf.buf == NULL) {
740 len = SSL3_RT_MAX_PLAIN_LENGTH
741 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
742 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) {
743 s->s3->init_extra = 1;
744 len += SSL3_RT_MAX_EXTRA;
746 #ifndef OPENSSL_NO_COMP
747 if (!(s->options & SSL_OP_NO_COMPRESSION))
748 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
750 if ((p = freelist_extract(s->ctx, 1, len)) == NULL)
753 s->s3->rbuf.len = len;
756 s->packet = &(s->s3->rbuf.buf[0]);
760 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE);
764 int ssl3_setup_write_buffer(SSL *s)
767 size_t len, align = 0, headerlen;
769 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
770 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
772 headerlen = SSL3_RT_HEADER_LENGTH;
774 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
775 align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
778 if (s->s3->wbuf.buf == NULL) {
779 len = s->max_send_fragment
780 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
781 #ifndef OPENSSL_NO_COMP
782 if (!(s->options & SSL_OP_NO_COMPRESSION))
783 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
785 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
786 len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
788 if ((p = freelist_extract(s->ctx, 0, len)) == NULL)
791 s->s3->wbuf.len = len;
797 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE);
801 int ssl3_setup_buffers(SSL *s)
803 if (!ssl3_setup_read_buffer(s))
805 if (!ssl3_setup_write_buffer(s))
810 int ssl3_release_write_buffer(SSL *s)
812 if (s->s3->wbuf.buf != NULL) {
813 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
814 s->s3->wbuf.buf = NULL;
819 int ssl3_release_read_buffer(SSL *s)
821 if (s->s3->rbuf.buf != NULL) {
822 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
823 s->s3->rbuf.buf = NULL;