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>
127 /* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
128 int ssl3_do_write(SSL *s, int type)
132 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
134 if (ret < 0) return(-1);
135 if (type == SSL3_RT_HANDSHAKE)
136 /* should not be done for 'Hello Request's, but in that case
137 * we'll ignore the result anyway */
138 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
140 if (ret == s->init_num)
143 s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
151 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
159 p = ssl_handshake_start(s);
161 i=s->method->ssl3_enc->final_finish_mac(s,
162 sender,slen,s->s3->tmp.finish_md);
163 s->s3->tmp.finish_md_len = i;
164 memcpy(p, s->s3->tmp.finish_md, i);
167 /* Copy the finished so we can use it for
168 renegotiation checks */
169 if(s->type == SSL_ST_CONNECT)
171 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
172 memcpy(s->s3->previous_client_finished,
173 s->s3->tmp.finish_md, i);
174 s->s3->previous_client_finished_len=i;
178 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
179 memcpy(s->s3->previous_server_finished,
180 s->s3->tmp.finish_md, i);
181 s->s3->previous_server_finished_len=i;
184 #ifdef OPENSSL_SYS_WIN16
185 /* MSVC 1.5 does not clear the top bytes of the word unless
190 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
194 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
195 return ssl_do_write(s);
198 #ifndef OPENSSL_NO_NEXTPROTONEG
199 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
200 static void ssl3_take_mac(SSL *s)
205 if (s->state & SSL_ST_CONNECT)
207 sender=s->method->ssl3_enc->server_finished_label;
208 slen=s->method->ssl3_enc->server_finished_label_len;
212 sender=s->method->ssl3_enc->client_finished_label;
213 slen=s->method->ssl3_enc->client_finished_label_len;
216 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
217 sender,slen,s->s3->tmp.peer_finish_md);
221 int ssl3_get_finished(SSL *s, int a, int b)
227 #ifdef OPENSSL_NO_NEXTPROTONEG
228 /* the mac has already been generated when we received the
229 * change cipher spec message and is in s->s3->tmp.peer_finish_md
233 n=s->method->ssl_get_message(s,
237 64, /* should actually be 36+4 :-) */
240 if (!ok) return((int)n);
242 /* If this occurs, we have missed a message */
243 if (!s->s3->change_cipher_spec)
245 al=SSL_AD_UNEXPECTED_MESSAGE;
246 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
249 s->s3->change_cipher_spec=0;
251 p = (unsigned char *)s->init_msg;
252 i = s->s3->tmp.peer_finish_md_len;
256 al=SSL_AD_DECODE_ERROR;
257 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
261 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
263 al=SSL_AD_DECRYPT_ERROR;
264 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
268 /* Copy the finished so we can use it for
269 renegotiation checks */
270 if(s->type == SSL_ST_ACCEPT)
272 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
273 memcpy(s->s3->previous_client_finished,
274 s->s3->tmp.peer_finish_md, i);
275 s->s3->previous_client_finished_len=i;
279 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
280 memcpy(s->s3->previous_server_finished,
281 s->s3->tmp.peer_finish_md, i);
282 s->s3->previous_server_finished_len=i;
287 ssl3_send_alert(s,SSL3_AL_FATAL,al);
291 /* for these 2 messages, we need to
292 * ssl->enc_read_ctx re-init
293 * ssl->s3->read_sequence zero
294 * ssl->s3->read_mac_secret re-init
295 * ssl->session->read_sym_enc assign
296 * ssl->session->read_compression assign
297 * ssl->session->read_hash assign
299 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
305 p=(unsigned char *)s->init_buf->data;
313 /* SSL3_ST_CW_CHANGE_B */
314 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
317 unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
320 unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
322 if (!ssl_add_cert_chain(s, cpk, &l))
325 l -= 3 + SSL_HM_HEADER_LENGTH(s);
326 p = ssl_handshake_start(s);
329 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
330 return l + SSL_HM_HEADER_LENGTH(s);
333 /* Obtain handshake message of message type 'mt' (any if mt == -1),
334 * maximum acceptable body length 'max'.
335 * The first four bytes (msg_type and length) are read in state 'st1',
336 * the body is read in state 'stn'.
338 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
345 if (s->s3->tmp.reuse_message)
347 s->s3->tmp.reuse_message=0;
348 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
350 al=SSL_AD_UNEXPECTED_MESSAGE;
351 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
355 s->init_msg = s->init_buf->data + 4;
356 s->init_num = (int)s->s3->tmp.message_size;
360 p=(unsigned char *)s->init_buf->data;
362 if (s->state == st1) /* s->init_num < 4 */
368 while (s->init_num < 4)
370 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
371 &p[s->init_num],4 - s->init_num, 0);
374 s->rwstate=SSL_READING;
383 if (p[0] == SSL3_MT_HELLO_REQUEST)
384 /* The server may always send 'Hello Request' messages --
385 * we are doing a handshake anyway now, so ignore them
386 * if their format is correct. Does not count for
388 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
394 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
397 while (skip_message);
399 /* s->init_num == 4 */
401 if ((mt >= 0) && (*p != mt))
403 al=SSL_AD_UNEXPECTED_MESSAGE;
404 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
407 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
408 (st1 == SSL3_ST_SR_CERT_A) &&
409 (stn == SSL3_ST_SR_CERT_B))
411 /* At this point we have got an MS SGC second client
412 * hello (maybe we should always allow the client to
413 * start a new handshake?). We need to restart the mac.
414 * Don't increment {num,total}_renegotiations because
415 * we have not completed the handshake. */
416 ssl3_init_finished_mac(s);
419 s->s3->tmp.message_type= *(p++);
422 if (l > (unsigned long)max)
424 al=SSL_AD_ILLEGAL_PARAMETER;
425 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
428 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
430 al=SSL_AD_ILLEGAL_PARAMETER;
431 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
434 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
436 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
439 s->s3->tmp.message_size=l;
442 s->init_msg = s->init_buf->data + 4;
446 /* next state (stn) */
448 n = s->s3->tmp.message_size - s->init_num;
451 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
454 s->rwstate=SSL_READING;
462 #ifndef OPENSSL_NO_NEXTPROTONEG
463 /* If receiving Finished, record MAC of prior handshake messages for
464 * Finished verification. */
465 if (*s->init_buf->data == SSL3_MT_FINISHED)
469 /* Feed this message into MAC computation. */
470 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
472 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
476 ssl3_send_alert(s,SSL3_AL_FATAL,al);
482 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
488 pk=X509_get_pubkey(x);
491 if (pk == NULL) goto err;
494 if (i == EVP_PKEY_RSA)
496 ret=SSL_PKEY_RSA_ENC;
498 else if (i == EVP_PKEY_DSA)
500 ret=SSL_PKEY_DSA_SIGN;
502 #ifndef OPENSSL_NO_EC
503 else if (i == EVP_PKEY_EC)
508 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
510 ret = SSL_PKEY_GOST94;
512 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
514 ret = SSL_PKEY_GOST01;
516 else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX))
518 /* For DH two cases: DH certificate signed with RSA and
519 * DH certificate signed with DSA.
521 i = X509_certificate_type(x, pk);
523 ret = SSL_PKEY_DH_RSA;
524 else if (i & EVP_PKS_DSA)
525 ret = SSL_PKEY_DH_DSA;
529 if(!pkey) EVP_PKEY_free(pk);
533 int ssl_verify_alarm_type(long type)
539 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
540 case X509_V_ERR_UNABLE_TO_GET_CRL:
541 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
542 al=SSL_AD_UNKNOWN_CA;
544 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
545 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
546 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
547 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
548 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
549 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
550 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
551 case X509_V_ERR_CERT_NOT_YET_VALID:
552 case X509_V_ERR_CRL_NOT_YET_VALID:
553 case X509_V_ERR_CERT_UNTRUSTED:
554 case X509_V_ERR_CERT_REJECTED:
555 al=SSL_AD_BAD_CERTIFICATE;
557 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
558 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
559 al=SSL_AD_DECRYPT_ERROR;
561 case X509_V_ERR_CERT_HAS_EXPIRED:
562 case X509_V_ERR_CRL_HAS_EXPIRED:
563 al=SSL_AD_CERTIFICATE_EXPIRED;
565 case X509_V_ERR_CERT_REVOKED:
566 al=SSL_AD_CERTIFICATE_REVOKED;
568 case X509_V_ERR_OUT_OF_MEM:
569 al=SSL_AD_INTERNAL_ERROR;
571 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
572 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
573 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
574 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
575 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
576 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
577 case X509_V_ERR_INVALID_CA:
578 al=SSL_AD_UNKNOWN_CA;
580 case X509_V_ERR_APPLICATION_VERIFICATION:
581 al=SSL_AD_HANDSHAKE_FAILURE;
583 case X509_V_ERR_INVALID_PURPOSE:
584 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
587 al=SSL_AD_CERTIFICATE_UNKNOWN;
593 #ifndef OPENSSL_NO_BUF_FREELISTS
594 /* On some platforms, malloc() performance is bad enough that you can't just
595 * free() and malloc() buffers all the time, so we need to use freelists from
596 * unused buffers. Currently, each freelist holds memory chunks of only a
597 * given size (list->chunklen); other sized chunks are freed and malloced.
598 * This doesn't help much if you're using many different SSL option settings
599 * with a given context. (The options affecting buffer size are
600 * max_send_fragment, read buffer vs write buffer,
601 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
602 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
603 * possible size is not an option, since max_send_fragment can take on many
606 * If you are on a platform with a slow malloc(), and you're using SSL
607 * connections with many different settings for these options, and you need to
608 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
609 * - Link against a faster malloc implementation.
610 * - Use a separate SSL_CTX for each option set.
611 * - Improve this code.
614 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
616 SSL3_BUF_FREELIST *list;
617 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
620 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
621 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
622 if (list != NULL && sz == (int)list->chunklen)
626 list->head = ent->next;
628 if (--list->len == 0)
631 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
633 result = OPENSSL_malloc(sz);
638 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
640 SSL3_BUF_FREELIST *list;
641 SSL3_BUF_FREELIST_ENTRY *ent;
643 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
644 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
646 (sz == list->chunklen || list->chunklen == 0) &&
647 list->len < ctx->freelist_max_len &&
652 ent->next = list->head;
658 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
663 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
664 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
667 int ssl3_setup_read_buffer(SSL *s)
670 size_t len,align=0,headerlen;
672 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
673 headerlen = DTLS1_RT_HEADER_LENGTH;
675 headerlen = SSL3_RT_HEADER_LENGTH;
677 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
678 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
681 if (s->s3->rbuf.buf == NULL)
683 len = SSL3_RT_MAX_PLAIN_LENGTH
684 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
686 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
688 s->s3->init_extra = 1;
689 len += SSL3_RT_MAX_EXTRA;
691 #ifndef OPENSSL_NO_COMP
692 if (!(s->options & SSL_OP_NO_COMPRESSION))
693 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
695 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
698 s->s3->rbuf.len = len;
701 s->packet= &(s->s3->rbuf.buf[0]);
705 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
709 int ssl3_setup_write_buffer(SSL *s)
712 size_t len,align=0,headerlen;
714 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
715 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
717 headerlen = SSL3_RT_HEADER_LENGTH;
719 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
720 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
723 if (s->s3->wbuf.buf == NULL)
725 len = s->max_send_fragment
726 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
728 #ifndef OPENSSL_NO_COMP
729 if (!(s->options & SSL_OP_NO_COMPRESSION))
730 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
732 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
733 len += headerlen + align
734 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
736 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
739 s->s3->wbuf.len = len;
745 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
750 int ssl3_setup_buffers(SSL *s)
752 if (!ssl3_setup_read_buffer(s))
754 if (!ssl3_setup_write_buffer(s))
759 int ssl3_release_write_buffer(SSL *s)
761 if (s->s3->wbuf.buf != NULL)
763 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
764 s->s3->wbuf.buf = NULL;
769 int ssl3_release_read_buffer(SSL *s)
771 if (s->s3->rbuf.buf != NULL)
773 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
774 s->s3->rbuf.buf = NULL;