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1/* ssl/s3_both.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58/* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
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
71 * distribution.
72 *
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/)"
77 *
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.
82 *
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.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
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 * ====================================================================
105 *
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).
109 *
110 */
111
112#include <limits.h>
113#include <string.h>
114#include <stdio.h>
115#include "ssl_locl.h"
116#include <openssl/buffer.h>
117#include <openssl/rand.h>
118#include <openssl/objects.h>
119#include <openssl/evp.h>
120#include <openssl/x509.h>
121
122/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
123int ssl3_do_write(SSL *s, int type)
124 {
125 int ret;
126
127 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
128 s->init_num);
129 if (ret < 0) return(-1);
130 if (type == SSL3_RT_HANDSHAKE)
131 /* should not be done for 'Hello Request's, but in that case
132 * we'll ignore the result anyway */
133 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
134
135 if (ret == s->init_num)
136 {
137 if (s->msg_callback)
138 s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
139 return(1);
140 }
141 s->init_off+=ret;
142 s->init_num-=ret;
143 return(0);
144 }
145
146int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
147 {
148 unsigned char *p,*d;
149 int i;
150 unsigned long l;
151
152 if (s->state == a)
153 {
154 d=(unsigned char *)s->init_buf->data;
155 p= &(d[4]);
156
157 i=s->method->ssl3_enc->final_finish_mac(s,
158 &(s->s3->finish_dgst1),
159 &(s->s3->finish_dgst2),
160 sender,slen,s->s3->tmp.finish_md);
161 s->s3->tmp.finish_md_len = i;
162 memcpy(p, s->s3->tmp.finish_md, i);
163 p+=i;
164 l=i;
165
166#ifdef OPENSSL_SYS_WIN16
167 /* MSVC 1.5 does not clear the top bytes of the word unless
168 * I do this.
169 */
170 l&=0xffff;
171#endif
172
173 *(d++)=SSL3_MT_FINISHED;
174 l2n3(l,d);
175 s->init_num=(int)l+4;
176 s->init_off=0;
177
178 s->state=b;
179 }
180
181 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
182 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
183 }
184
185int ssl3_get_finished(SSL *s, int a, int b)
186 {
187 int al,i,ok;
188 long n;
189 unsigned char *p;
190
191 /* the mac has already been generated when we received the
192 * change cipher spec message and is in s->s3->tmp.peer_finish_md
193 */
194
195 n=ssl3_get_message(s,
196 a,
197 b,
198 SSL3_MT_FINISHED,
199 64, /* should actually be 36+4 :-) */
200 &ok);
201
202 if (!ok) return((int)n);
203
204 /* If this occurs, we have missed a message */
205 if (!s->s3->change_cipher_spec)
206 {
207 al=SSL_AD_UNEXPECTED_MESSAGE;
208 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
209 goto f_err;
210 }
211 s->s3->change_cipher_spec=0;
212
213 p = (unsigned char *)s->init_msg;
214 i = s->s3->tmp.peer_finish_md_len;
215
216 if (i != n)
217 {
218 al=SSL_AD_DECODE_ERROR;
219 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
220 goto f_err;
221 }
222
223 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
224 {
225 al=SSL_AD_DECRYPT_ERROR;
226 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
227 goto f_err;
228 }
229
230 return(1);
231f_err:
232 ssl3_send_alert(s,SSL3_AL_FATAL,al);
233 return(0);
234 }
235
236/* for these 2 messages, we need to
237 * ssl->enc_read_ctx re-init
238 * ssl->s3->read_sequence zero
239 * ssl->s3->read_mac_secret re-init
240 * ssl->session->read_sym_enc assign
241 * ssl->session->read_compression assign
242 * ssl->session->read_hash assign
243 */
244int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
245 {
246 unsigned char *p;
247
248 if (s->state == a)
249 {
250 p=(unsigned char *)s->init_buf->data;
251 *p=SSL3_MT_CCS;
252 s->init_num=1;
253 s->init_off=0;
254
255 s->state=b;
256 }
257
258 /* SSL3_ST_CW_CHANGE_B */
259 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
260 }
261
262unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
263 {
264 unsigned char *p;
265 int n,i;
266 unsigned long l=7;
267 BUF_MEM *buf;
268 X509_STORE_CTX xs_ctx;
269 X509_OBJECT obj;
270
271 /* TLSv1 sends a chain with nothing in it, instead of an alert */
272 buf=s->init_buf;
273 if (!BUF_MEM_grow(buf,(int)(10)))
274 {
275 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
276 return(0);
277 }
278 if (x != NULL)
279 {
280 if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
281 {
282 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
283 return(0);
284 }
285
286 for (;;)
287 {
288 n=i2d_X509(x,NULL);
289 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
290 {
291 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
292 return(0);
293 }
294 p=(unsigned char *)&(buf->data[l]);
295 l2n3(n,p);
296 i2d_X509(x,&p);
297 l+=n+3;
298 if (X509_NAME_cmp(X509_get_subject_name(x),
299 X509_get_issuer_name(x)) == 0) break;
300
301 i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
302 X509_get_issuer_name(x),&obj);
303 if (i <= 0) break;
304 x=obj.data.x509;
305 /* Count is one too high since the X509_STORE_get uped the
306 * ref count */
307 X509_free(x);
308 }
309
310 X509_STORE_CTX_cleanup(&xs_ctx);
311 }
312
313 /* Thawte special :-) */
314 if (s->ctx->extra_certs != NULL)
315 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
316 {
317 x=sk_X509_value(s->ctx->extra_certs,i);
318 n=i2d_X509(x,NULL);
319 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
320 {
321 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
322 return(0);
323 }
324 p=(unsigned char *)&(buf->data[l]);
325 l2n3(n,p);
326 i2d_X509(x,&p);
327 l+=n+3;
328 }
329
330 l-=7;
331 p=(unsigned char *)&(buf->data[4]);
332 l2n3(l,p);
333 l+=3;
334 p=(unsigned char *)&(buf->data[0]);
335 *(p++)=SSL3_MT_CERTIFICATE;
336 l2n3(l,p);
337 l+=4;
338 return(l);
339 }
340
341/* Obtain handshake message of message type 'mt' (any if mt == -1),
342 * maximum acceptable body length 'max'.
343 * The first four bytes (msg_type and length) are read in state 'st1',
344 * the body is read in state 'stn'.
345 */
346long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
347 {
348 unsigned char *p;
349 unsigned long l;
350 long n;
351 int i,al;
352
353 if (s->s3->tmp.reuse_message)
354 {
355 s->s3->tmp.reuse_message=0;
356 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
357 {
358 al=SSL_AD_UNEXPECTED_MESSAGE;
359 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
360 goto f_err;
361 }
362 *ok=1;
363 s->init_msg = s->init_buf->data + 4;
364 s->init_num = (int)s->s3->tmp.message_size;
365 return s->init_num;
366 }
367
368 p=(unsigned char *)s->init_buf->data;
369
370 if (s->state == st1) /* s->init_num < 4 */
371 {
372 int skip_message;
373
374 do
375 {
376 while (s->init_num < 4)
377 {
378 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
379 4 - s->init_num, 0);
380 if (i <= 0)
381 {
382 s->rwstate=SSL_READING;
383 *ok = 0;
384 return i;
385 }
386 s->init_num+=i;
387 }
388
389 skip_message = 0;
390 if (!s->server)
391 if (p[0] == SSL3_MT_HELLO_REQUEST)
392 /* The server may always send 'Hello Request' messages --
393 * we are doing a handshake anyway now, so ignore them
394 * if their format is correct. Does not count for
395 * 'Finished' MAC. */
396 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
397 {
398 s->init_num = 0;
399 skip_message = 1;
400
401 if (s->msg_callback)
402 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
403 }
404 }
405 while (skip_message);
406
407 /* s->init_num == 4 */
408
409 if ((mt >= 0) && (*p != mt))
410 {
411 al=SSL_AD_UNEXPECTED_MESSAGE;
412 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
413 goto f_err;
414 }
415 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
416 (st1 == SSL3_ST_SR_CERT_A) &&
417 (stn == SSL3_ST_SR_CERT_B))
418 {
419 /* At this point we have got an MS SGC second client
420 * hello (maybe we should always allow the client to
421 * start a new handshake?). We need to restart the mac.
422 * Don't increment {num,total}_renegotiations because
423 * we have not completed the handshake. */
424 ssl3_init_finished_mac(s);
425 }
426
427 s->s3->tmp.message_type= *(p++);
428
429 n2l3(p,l);
430 if (l > (unsigned long)max)
431 {
432 al=SSL_AD_ILLEGAL_PARAMETER;
433 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
434 goto f_err;
435 }
436 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
437 {
438 al=SSL_AD_ILLEGAL_PARAMETER;
439 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
440 goto f_err;
441 }
442 if (l && !BUF_MEM_grow(s->init_buf,(int)l+4))
443 {
444 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
445 goto err;
446 }
447 s->s3->tmp.message_size=l;
448 s->state=stn;
449
450 s->init_msg = s->init_buf->data + 4;
451 s->init_num = 0;
452 }
453
454 /* next state (stn) */
455 p = s->init_msg;
456 n = s->s3->tmp.message_size - s->init_num;
457 while (n > 0)
458 {
459 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
460 if (i <= 0)
461 {
462 s->rwstate=SSL_READING;
463 *ok = 0;
464 return i;
465 }
466 s->init_num += i;
467 n -= i;
468 }
469 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
470 if (s->msg_callback)
471 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
472 *ok=1;
473 return s->init_num;
474f_err:
475 ssl3_send_alert(s,SSL3_AL_FATAL,al);
476err:
477 *ok=0;
478 return(-1);
479 }
480
481int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
482 {
483 EVP_PKEY *pk;
484 int ret= -1,i,j;
485
486 if (pkey == NULL)
487 pk=X509_get_pubkey(x);
488 else
489 pk=pkey;
490 if (pk == NULL) goto err;
491
492 i=pk->type;
493 if (i == EVP_PKEY_RSA)
494 {
495 ret=SSL_PKEY_RSA_ENC;
496 if (x != NULL)
497 {
498 j=X509_get_ext_count(x);
499 /* check to see if this is a signing only certificate */
500 /* EAY EAY EAY EAY */
501 }
502 }
503 else if (i == EVP_PKEY_DSA)
504 {
505 ret=SSL_PKEY_DSA_SIGN;
506 }
507 else if (i == EVP_PKEY_DH)
508 {
509 /* if we just have a key, we needs to be guess */
510
511 if (x == NULL)
512 ret=SSL_PKEY_DH_DSA;
513 else
514 {
515 j=X509_get_signature_type(x);
516 if (j == EVP_PKEY_RSA)
517 ret=SSL_PKEY_DH_RSA;
518 else if (j== EVP_PKEY_DSA)
519 ret=SSL_PKEY_DH_DSA;
520 else ret= -1;
521 }
522 }
523 else
524 ret= -1;
525
526err:
527 if(!pkey) EVP_PKEY_free(pk);
528 return(ret);
529 }
530
531int ssl_verify_alarm_type(long type)
532 {
533 int al;
534
535 switch(type)
536 {
537 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
538 case X509_V_ERR_UNABLE_TO_GET_CRL:
539 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
540 al=SSL_AD_UNKNOWN_CA;
541 break;
542 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
543 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
544 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
545 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
546 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
547 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
548 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
549 case X509_V_ERR_CERT_NOT_YET_VALID:
550 case X509_V_ERR_CRL_NOT_YET_VALID:
551 case X509_V_ERR_CERT_UNTRUSTED:
552 case X509_V_ERR_CERT_REJECTED:
553 al=SSL_AD_BAD_CERTIFICATE;
554 break;
555 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
556 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
557 al=SSL_AD_DECRYPT_ERROR;
558 break;
559 case X509_V_ERR_CERT_HAS_EXPIRED:
560 case X509_V_ERR_CRL_HAS_EXPIRED:
561 al=SSL_AD_CERTIFICATE_EXPIRED;
562 break;
563 case X509_V_ERR_CERT_REVOKED:
564 al=SSL_AD_CERTIFICATE_REVOKED;
565 break;
566 case X509_V_ERR_OUT_OF_MEM:
567 al=SSL_AD_INTERNAL_ERROR;
568 break;
569 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
570 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
571 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
572 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
573 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
574 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
575 case X509_V_ERR_INVALID_CA:
576 al=SSL_AD_UNKNOWN_CA;
577 break;
578 case X509_V_ERR_APPLICATION_VERIFICATION:
579 al=SSL_AD_HANDSHAKE_FAILURE;
580 break;
581 case X509_V_ERR_INVALID_PURPOSE:
582 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
583 break;
584 default:
585 al=SSL_AD_CERTIFICATE_UNKNOWN;
586 break;
587 }
588 return(al);
589 }
590
591int ssl3_setup_buffers(SSL *s)
592 {
593 unsigned char *p;
594 unsigned int extra;
595 size_t len;
596
597 if (s->s3->rbuf.buf == NULL)
598 {
599 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
600 extra=SSL3_RT_MAX_EXTRA;
601 else
602 extra=0;
603 len = SSL3_RT_MAX_PACKET_SIZE + extra;
604 if ((p=OPENSSL_malloc(len)) == NULL)
605 goto err;
606 s->s3->rbuf.buf = p;
607 s->s3->rbuf.len = len;
608 }
609
610 if (s->s3->wbuf.buf == NULL)
611 {
612 len = SSL3_RT_MAX_PACKET_SIZE;
613 len += SSL3_RT_HEADER_LENGTH + 256; /* extra space for empty fragment */
614 if ((p=OPENSSL_malloc(len)) == NULL)
615 goto err;
616 s->s3->wbuf.buf = p;
617 s->s3->wbuf.len = len;
618 }
619 s->packet= &(s->s3->rbuf.buf[0]);
620 return(1);
621err:
622 SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
623 return(0);
624 }
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