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 d=(unsigned char *)s->init_buf->data;
162 i=s->method->ssl3_enc->final_finish_mac(s,
163 sender,slen,s->s3->tmp.finish_md);
164 s->s3->tmp.finish_md_len = i;
165 memcpy(p, s->s3->tmp.finish_md, i);
169 /* Copy the finished so we can use it for
170 renegotiation checks */
171 if(s->type == SSL_ST_CONNECT)
173 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
174 memcpy(s->s3->previous_client_finished,
175 s->s3->tmp.finish_md, i);
176 s->s3->previous_client_finished_len=i;
180 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
181 memcpy(s->s3->previous_server_finished,
182 s->s3->tmp.finish_md, i);
183 s->s3->previous_server_finished_len=i;
186 #ifdef OPENSSL_SYS_WIN16
187 /* MSVC 1.5 does not clear the top bytes of the word unless
193 *(d++)=SSL3_MT_FINISHED;
195 s->init_num=(int)l+4;
201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
202 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
205 int ssl3_get_finished(SSL *s, int a, int b)
211 /* the mac has already been generated when we received the
212 * change cipher spec message and is in s->s3->tmp.peer_finish_md
215 /* 64 argument should actually be 36+4 :-) */
216 n=s->method->ssl_get_message(s,
223 if (!ok) return((int)n);
225 /* If this occurs, we have missed a message */
226 if (!s->s3->change_cipher_spec)
228 al=SSL_AD_UNEXPECTED_MESSAGE;
229 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
232 s->s3->change_cipher_spec=0;
234 p = (unsigned char *)s->init_msg;
235 i = s->s3->tmp.peer_finish_md_len;
239 al=SSL_AD_DECODE_ERROR;
240 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
244 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
246 al=SSL_AD_DECRYPT_ERROR;
247 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
251 /* Copy the finished so we can use it for
252 renegotiation checks */
253 if(s->type == SSL_ST_ACCEPT)
255 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
256 memcpy(s->s3->previous_client_finished,
257 s->s3->tmp.peer_finish_md, i);
258 s->s3->previous_client_finished_len=i;
262 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
263 memcpy(s->s3->previous_server_finished,
264 s->s3->tmp.peer_finish_md, i);
265 s->s3->previous_server_finished_len=i;
270 ssl3_send_alert(s,SSL3_AL_FATAL,al);
275 * for these 2 messages, we need to
276 * ssl->enc_read_ctx re-init
277 * ssl->s3->read_sequence zero
278 * ssl->s3->read_mac_secret re-init
279 * ssl->session->read_sym_enc assign
280 * ssl->session->read_compression assign
281 * ssl->session->read_hash assign
283 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
289 p=(unsigned char *)s->init_buf->data;
297 /* SSL3_ST_CW_CHANGE_B */
298 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
301 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
307 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
309 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
312 p=(unsigned char *)&(buf->data[*l]);
320 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
328 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
333 /* TLSv1 sends a chain with nothing in it, instead of an alert */
335 if (!BUF_MEM_grow_clean(buf,10))
337 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
344 if (ssl3_add_cert_to_buf(buf, &l, x))
349 X509_STORE_CTX xs_ctx;
351 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
353 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
356 X509_verify_cert(&xs_ctx);
357 /* Don't leave errors in the queue */
359 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
361 x = sk_X509_value(xs_ctx.chain, i);
363 if (ssl3_add_cert_to_buf(buf, &l, x))
365 X509_STORE_CTX_cleanup(&xs_ctx);
369 X509_STORE_CTX_cleanup(&xs_ctx);
372 /* Thawte special :-) */
373 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
375 x=sk_X509_value(s->ctx->extra_certs,i);
376 if (ssl3_add_cert_to_buf(buf, &l, x))
381 p=(unsigned char *)&(buf->data[4]);
384 p=(unsigned char *)&(buf->data[0]);
385 *(p++)=SSL3_MT_CERTIFICATE;
391 /* Obtain handshake message of message type 'mt' (any if mt == -1),
392 * maximum acceptable body length 'max'.
393 * The first four bytes (msg_type and length) are read in state 'st1',
394 * the body is read in state 'stn'.
396 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
403 if (s->s3->tmp.reuse_message)
405 s->s3->tmp.reuse_message=0;
406 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
408 al=SSL_AD_UNEXPECTED_MESSAGE;
409 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
414 s->init_msg = s->init_buf->data + 4;
415 s->init_num = (int)s->s3->tmp.message_size;
419 p=(unsigned char *)s->init_buf->data;
421 if (s->state == st1) /* s->init_num < 4 */
427 while (s->init_num < 4)
429 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
430 &p[s->init_num],4 - s->init_num, 0);
433 s->rwstate=SSL_READING;
442 if (p[0] == SSL3_MT_HELLO_REQUEST)
443 /* The server may always send 'Hello Request' messages --
444 * we are doing a handshake anyway now, so ignore them
445 * if their format is correct. Does not count for
447 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
453 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
456 while (skip_message);
458 /* s->init_num == 4 */
460 if ((mt >= 0) && (*p != mt))
462 al=SSL_AD_UNEXPECTED_MESSAGE;
463 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
466 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
467 (st1 == SSL3_ST_SR_CERT_A) &&
468 (stn == SSL3_ST_SR_CERT_B))
470 /* At this point we have got an MS SGC second client
471 * hello (maybe we should always allow the client to
472 * start a new handshake?). We need to restart the mac.
473 * Don't increment {num,total}_renegotiations because
474 * we have not completed the handshake. */
475 ssl3_init_finished_mac(s);
478 s->s3->tmp.message_type= *(p++);
481 if (l > (unsigned long)max)
483 al=SSL_AD_ILLEGAL_PARAMETER;
484 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
487 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
489 al=SSL_AD_ILLEGAL_PARAMETER;
490 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
493 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
495 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
498 s->s3->tmp.message_size=l;
501 s->init_msg = s->init_buf->data + 4;
505 /* next state (stn) */
507 n = s->s3->tmp.message_size - s->init_num;
510 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
513 s->rwstate=SSL_READING;
520 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
522 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
526 ssl3_send_alert(s,SSL3_AL_FATAL,al);
532 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
538 pk=X509_get_pubkey(x);
541 if (pk == NULL) goto err;
544 if (i == EVP_PKEY_RSA)
546 ret=SSL_PKEY_RSA_ENC;
548 else if (i == EVP_PKEY_DSA)
550 ret=SSL_PKEY_DSA_SIGN;
552 #ifndef OPENSSL_NO_EC
553 else if (i == EVP_PKEY_EC)
558 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
560 ret = SSL_PKEY_GOST94;
562 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
564 ret = SSL_PKEY_GOST01;
567 if(!pkey) EVP_PKEY_free(pk);
571 int ssl_verify_alarm_type(long type)
577 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
578 case X509_V_ERR_UNABLE_TO_GET_CRL:
579 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
580 al=SSL_AD_UNKNOWN_CA;
582 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
583 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
584 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
585 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
586 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
587 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
588 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
589 case X509_V_ERR_CERT_NOT_YET_VALID:
590 case X509_V_ERR_CRL_NOT_YET_VALID:
591 case X509_V_ERR_CERT_UNTRUSTED:
592 case X509_V_ERR_CERT_REJECTED:
593 al=SSL_AD_BAD_CERTIFICATE;
595 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
596 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
597 al=SSL_AD_DECRYPT_ERROR;
599 case X509_V_ERR_CERT_HAS_EXPIRED:
600 case X509_V_ERR_CRL_HAS_EXPIRED:
601 al=SSL_AD_CERTIFICATE_EXPIRED;
603 case X509_V_ERR_CERT_REVOKED:
604 al=SSL_AD_CERTIFICATE_REVOKED;
606 case X509_V_ERR_OUT_OF_MEM:
607 al=SSL_AD_INTERNAL_ERROR;
609 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
610 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
611 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
612 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
613 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
614 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
615 case X509_V_ERR_INVALID_CA:
616 al=SSL_AD_UNKNOWN_CA;
618 case X509_V_ERR_APPLICATION_VERIFICATION:
619 al=SSL_AD_HANDSHAKE_FAILURE;
621 case X509_V_ERR_INVALID_PURPOSE:
622 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
625 al=SSL_AD_CERTIFICATE_UNKNOWN;
631 #ifndef OPENSSL_NO_BUF_FREELISTS
633 * On some platforms, malloc() performance is bad enough that you can't just
634 * free() and malloc() buffers all the time, so we need to use freelists from
635 * unused buffers. Currently, each freelist holds memory chunks of only a
636 * given size (list->chunklen); other sized chunks are freed and malloced.
637 * This doesn't help much if you're using many different SSL option settings
638 * with a given context. (The options affecting buffer size are
639 * max_send_fragment, read buffer vs write buffer,
640 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
641 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
642 * possible size is not an option, since max_send_fragment can take on many
645 * If you are on a platform with a slow malloc(), and you're using SSL
646 * connections with many different settings for these options, and you need to
647 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
648 * - Link against a faster malloc implementation.
649 * - Use a separate SSL_CTX for each option set.
650 * - Improve this code.
653 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
655 SSL3_BUF_FREELIST *list;
656 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
659 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
660 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
661 if (list != NULL && sz == (int)list->chunklen)
665 list->head = ent->next;
667 if (--list->len == 0)
670 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
672 result = OPENSSL_malloc(sz);
677 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
679 SSL3_BUF_FREELIST *list;
680 SSL3_BUF_FREELIST_ENTRY *ent;
682 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
683 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
685 (sz == list->chunklen || list->chunklen == 0) &&
686 list->len < ctx->freelist_max_len &&
691 ent->next = list->head;
697 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
702 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
703 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
706 int ssl3_setup_read_buffer(SSL *s)
709 size_t len,align=0,headerlen;
711 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
712 headerlen = DTLS1_RT_HEADER_LENGTH;
714 headerlen = SSL3_RT_HEADER_LENGTH;
716 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
717 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
720 if (s->s3->rbuf.buf == NULL)
722 len = SSL3_RT_MAX_PLAIN_LENGTH
723 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
725 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
727 s->s3->init_extra = 1;
728 len += SSL3_RT_MAX_EXTRA;
730 #ifndef OPENSSL_NO_COMP
731 if (!(s->options & SSL_OP_NO_COMPRESSION))
732 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
734 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
737 s->s3->rbuf.len = len;
740 s->packet= &(s->s3->rbuf.buf[0]);
744 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
748 int ssl3_setup_write_buffer(SSL *s)
751 size_t len,align=0,headerlen;
753 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
754 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
756 headerlen = SSL3_RT_HEADER_LENGTH;
758 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
759 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
762 if (s->s3->wbuf.buf == NULL)
764 len = s->max_send_fragment
765 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
767 #ifndef OPENSSL_NO_COMP
768 if (!(s->options & SSL_OP_NO_COMPRESSION))
769 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
771 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
772 len += headerlen + align
773 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
775 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
778 s->s3->wbuf.len = len;
784 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
789 int ssl3_setup_buffers(SSL *s)
791 if (!ssl3_setup_read_buffer(s))
793 if (!ssl3_setup_write_buffer(s))
798 int ssl3_release_write_buffer(SSL *s)
800 if (s->s3->wbuf.buf != NULL)
802 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
803 s->s3->wbuf.buf = NULL;
808 int ssl3_release_read_buffer(SSL *s)
810 if (s->s3->rbuf.buf != NULL)
812 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
813 s->s3->rbuf.buf = NULL;