s3_both.c revision 656d9c7f52f88b3a3daccafa7655dec086c4756e
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 * 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.
115 */
116
117#include <limits.h>
118#include <string.h>
119#include <stdio.h>
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>
126
127/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
128int ssl3_do_write(SSL *s, int type)
129	{
130	int ret;
131
132	ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
133	                     s->init_num);
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);
139
140	if (ret == s->init_num)
141		{
142		if (s->msg_callback)
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);
144		return(1);
145		}
146	s->init_off+=ret;
147	s->init_num-=ret;
148	return(0);
149	}
150
151int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
152	{
153	unsigned char *p,*d;
154	int i;
155	unsigned long l;
156
157	if (s->state == a)
158		{
159		d=(unsigned char *)s->init_buf->data;
160		p= &(d[4]);
161
162		i=s->method->ssl3_enc->final_finish_mac(s,
163			&(s->s3->finish_dgst1),
164			&(s->s3->finish_dgst2),
165			sender,slen,s->s3->tmp.finish_md);
166		s->s3->tmp.finish_md_len = i;
167		memcpy(p, s->s3->tmp.finish_md, i);
168		p+=i;
169		l=i;
170
171#ifdef OPENSSL_SYS_WIN16
172		/* MSVC 1.5 does not clear the top bytes of the word unless
173		 * I do this.
174		 */
175		l&=0xffff;
176#endif
177
178		*(d++)=SSL3_MT_FINISHED;
179		l2n3(l,d);
180		s->init_num=(int)l+4;
181		s->init_off=0;
182
183		s->state=b;
184		}
185
186	/* SSL3_ST_SEND_xxxxxx_HELLO_B */
187	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
188	}
189
190int ssl3_get_finished(SSL *s, int a, int b)
191	{
192	int al,i,ok;
193	long n;
194	unsigned char *p;
195
196	/* the mac has already been generated when we received the
197	 * change cipher spec message and is in s->s3->tmp.peer_finish_md
198	 */
199
200	n=s->method->ssl_get_message(s,
201		a,
202		b,
203		SSL3_MT_FINISHED,
204		64, /* should actually be 36+4 :-) */
205		&ok);
206
207	if (!ok) return((int)n);
208
209	/* If this occurs, we have missed a message */
210	if (!s->s3->change_cipher_spec)
211		{
212		al=SSL_AD_UNEXPECTED_MESSAGE;
213		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
214		goto f_err;
215		}
216	s->s3->change_cipher_spec=0;
217
218	p = (unsigned char *)s->init_msg;
219	i = s->s3->tmp.peer_finish_md_len;
220
221	if (i != n)
222		{
223		al=SSL_AD_DECODE_ERROR;
224		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
225		goto f_err;
226		}
227
228	if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
229		{
230		al=SSL_AD_DECRYPT_ERROR;
231		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
232		goto f_err;
233		}
234
235	return(1);
236f_err:
237	ssl3_send_alert(s,SSL3_AL_FATAL,al);
238	return(0);
239	}
240
241/* for these 2 messages, we need to
242 * ssl->enc_read_ctx			re-init
243 * ssl->s3->read_sequence		zero
244 * ssl->s3->read_mac_secret		re-init
245 * ssl->session->read_sym_enc		assign
246 * ssl->session->read_compression	assign
247 * ssl->session->read_hash		assign
248 */
249int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
250	{
251	unsigned char *p;
252
253	if (s->state == a)
254		{
255		p=(unsigned char *)s->init_buf->data;
256		*p=SSL3_MT_CCS;
257		s->init_num=1;
258		s->init_off=0;
259
260		s->state=b;
261		}
262
263	/* SSL3_ST_CW_CHANGE_B */
264	return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
265	}
266
267unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
268	{
269	unsigned char *p;
270	int n,i;
271	unsigned long l=7;
272	BUF_MEM *buf;
273	X509_STORE_CTX xs_ctx;
274	X509_OBJECT obj;
275
276	int no_chain;
277
278	if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
279		no_chain = 1;
280	else
281		no_chain = 0;
282
283	/* TLSv1 sends a chain with nothing in it, instead of an alert */
284	buf=s->init_buf;
285	if (!BUF_MEM_grow_clean(buf,10))
286		{
287		SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
288		return(0);
289		}
290	if (x != NULL)
291		{
292		if(!no_chain && !X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
293			{
294			SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
295			return(0);
296			}
297
298		for (;;)
299			{
300			n=i2d_X509(x,NULL);
301			if (!BUF_MEM_grow_clean(buf,(int)(n+l+3)))
302				{
303				SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
304				return(0);
305				}
306			p=(unsigned char *)&(buf->data[l]);
307			l2n3(n,p);
308			i2d_X509(x,&p);
309			l+=n+3;
310
311			if (no_chain)
312				break;
313
314			if (X509_NAME_cmp(X509_get_subject_name(x),
315				X509_get_issuer_name(x)) == 0) break;
316
317			i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
318				X509_get_issuer_name(x),&obj);
319			if (i <= 0) break;
320			x=obj.data.x509;
321			/* Count is one too high since the X509_STORE_get uped the
322			 * ref count */
323			X509_free(x);
324			}
325		if (!no_chain)
326			X509_STORE_CTX_cleanup(&xs_ctx);
327		}
328
329	/* Thawte special :-) */
330	if (s->ctx->extra_certs != NULL)
331	for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
332		{
333		x=sk_X509_value(s->ctx->extra_certs,i);
334		n=i2d_X509(x,NULL);
335		if (!BUF_MEM_grow_clean(buf,(int)(n+l+3)))
336			{
337			SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
338			return(0);
339			}
340		p=(unsigned char *)&(buf->data[l]);
341		l2n3(n,p);
342		i2d_X509(x,&p);
343		l+=n+3;
344		}
345
346	l-=7;
347	p=(unsigned char *)&(buf->data[4]);
348	l2n3(l,p);
349	l+=3;
350	p=(unsigned char *)&(buf->data[0]);
351	*(p++)=SSL3_MT_CERTIFICATE;
352	l2n3(l,p);
353	l+=4;
354	return(l);
355	}
356
357/* Obtain handshake message of message type 'mt' (any if mt == -1),
358 * maximum acceptable body length 'max'.
359 * The first four bytes (msg_type and length) are read in state 'st1',
360 * the body is read in state 'stn'.
361 */
362long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
363	{
364	unsigned char *p;
365	unsigned long l;
366	long n;
367	int i,al;
368
369	if (s->s3->tmp.reuse_message)
370		{
371		s->s3->tmp.reuse_message=0;
372		if ((mt >= 0) && (s->s3->tmp.message_type != mt))
373			{
374			al=SSL_AD_UNEXPECTED_MESSAGE;
375			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
376			goto f_err;
377			}
378		*ok=1;
379		s->init_msg = s->init_buf->data + 4;
380		s->init_num = (int)s->s3->tmp.message_size;
381		return s->init_num;
382		}
383
384	p=(unsigned char *)s->init_buf->data;
385
386	if (s->state == st1) /* s->init_num < 4 */
387		{
388		int skip_message;
389
390		do
391			{
392			while (s->init_num < 4)
393				{
394				i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
395					&p[s->init_num],4 - s->init_num, 0);
396				if (i <= 0)
397					{
398					s->rwstate=SSL_READING;
399					*ok = 0;
400					return i;
401					}
402				s->init_num+=i;
403				}
404
405			skip_message = 0;
406			if (!s->server)
407				if (p[0] == SSL3_MT_HELLO_REQUEST)
408					/* The server may always send 'Hello Request' messages --
409					 * we are doing a handshake anyway now, so ignore them
410					 * if their format is correct. Does not count for
411					 * 'Finished' MAC. */
412					if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
413						{
414						s->init_num = 0;
415						skip_message = 1;
416
417						if (s->msg_callback)
418							s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
419						}
420			}
421		while (skip_message);
422
423		/* s->init_num == 4 */
424
425		if ((mt >= 0) && (*p != mt))
426			{
427			al=SSL_AD_UNEXPECTED_MESSAGE;
428			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
429			goto f_err;
430			}
431		if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
432					(st1 == SSL3_ST_SR_CERT_A) &&
433					(stn == SSL3_ST_SR_CERT_B))
434			{
435			/* At this point we have got an MS SGC second client
436			 * hello (maybe we should always allow the client to
437			 * start a new handshake?). We need to restart the mac.
438			 * Don't increment {num,total}_renegotiations because
439			 * we have not completed the handshake. */
440			ssl3_init_finished_mac(s);
441			}
442
443		s->s3->tmp.message_type= *(p++);
444
445		n2l3(p,l);
446		if (l > (unsigned long)max)
447			{
448			al=SSL_AD_ILLEGAL_PARAMETER;
449			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
450			goto f_err;
451			}
452		if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
453			{
454			al=SSL_AD_ILLEGAL_PARAMETER;
455			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
456			goto f_err;
457			}
458		if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
459			{
460			SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
461			goto err;
462			}
463		s->s3->tmp.message_size=l;
464		s->state=stn;
465
466		s->init_msg = s->init_buf->data + 4;
467		s->init_num = 0;
468		}
469
470	/* next state (stn) */
471	p = s->init_msg;
472	n = s->s3->tmp.message_size - s->init_num;
473	while (n > 0)
474		{
475		i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
476		if (i <= 0)
477			{
478			s->rwstate=SSL_READING;
479			*ok = 0;
480			return i;
481			}
482		s->init_num += i;
483		n -= i;
484		}
485	ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
486	if (s->msg_callback)
487		s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
488	*ok=1;
489	return s->init_num;
490f_err:
491	ssl3_send_alert(s,SSL3_AL_FATAL,al);
492err:
493	*ok=0;
494	return(-1);
495	}
496
497int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
498	{
499	EVP_PKEY *pk;
500	int ret= -1,i;
501
502	if (pkey == NULL)
503		pk=X509_get_pubkey(x);
504	else
505		pk=pkey;
506	if (pk == NULL) goto err;
507
508	i=pk->type;
509	if (i == EVP_PKEY_RSA)
510		{
511		ret=SSL_PKEY_RSA_ENC;
512		}
513	else if (i == EVP_PKEY_DSA)
514		{
515		ret=SSL_PKEY_DSA_SIGN;
516		}
517#ifndef OPENSSL_NO_EC
518	else if (i == EVP_PKEY_EC)
519		{
520		ret = SSL_PKEY_ECC;
521		}
522#endif
523
524err:
525	if(!pkey) EVP_PKEY_free(pk);
526	return(ret);
527	}
528
529int ssl_verify_alarm_type(long type)
530	{
531	int al;
532
533	switch(type)
534		{
535	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
536	case X509_V_ERR_UNABLE_TO_GET_CRL:
537	case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
538		al=SSL_AD_UNKNOWN_CA;
539		break;
540	case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
541	case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
542	case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
543	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
544	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
545	case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
546	case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
547	case X509_V_ERR_CERT_NOT_YET_VALID:
548	case X509_V_ERR_CRL_NOT_YET_VALID:
549	case X509_V_ERR_CERT_UNTRUSTED:
550	case X509_V_ERR_CERT_REJECTED:
551		al=SSL_AD_BAD_CERTIFICATE;
552		break;
553	case X509_V_ERR_CERT_SIGNATURE_FAILURE:
554	case X509_V_ERR_CRL_SIGNATURE_FAILURE:
555		al=SSL_AD_DECRYPT_ERROR;
556		break;
557	case X509_V_ERR_CERT_HAS_EXPIRED:
558	case X509_V_ERR_CRL_HAS_EXPIRED:
559		al=SSL_AD_CERTIFICATE_EXPIRED;
560		break;
561	case X509_V_ERR_CERT_REVOKED:
562		al=SSL_AD_CERTIFICATE_REVOKED;
563		break;
564	case X509_V_ERR_OUT_OF_MEM:
565		al=SSL_AD_INTERNAL_ERROR;
566		break;
567	case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
568	case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
569	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
570	case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
571	case X509_V_ERR_CERT_CHAIN_TOO_LONG:
572	case X509_V_ERR_PATH_LENGTH_EXCEEDED:
573	case X509_V_ERR_INVALID_CA:
574		al=SSL_AD_UNKNOWN_CA;
575		break;
576	case X509_V_ERR_APPLICATION_VERIFICATION:
577		al=SSL_AD_HANDSHAKE_FAILURE;
578		break;
579	case X509_V_ERR_INVALID_PURPOSE:
580		al=SSL_AD_UNSUPPORTED_CERTIFICATE;
581		break;
582	default:
583		al=SSL_AD_CERTIFICATE_UNKNOWN;
584		break;
585		}
586	return(al);
587	}
588
589int ssl3_setup_buffers(SSL *s)
590	{
591	unsigned char *p;
592	unsigned int extra;
593	size_t len;
594
595	if (s->s3->rbuf.buf == NULL)
596		{
597		if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
598			extra=SSL3_RT_MAX_EXTRA;
599		else
600			extra=0;
601		len = SSL3_RT_MAX_PACKET_SIZE + extra;
602		if ((p=OPENSSL_malloc(len)) == NULL)
603			goto err;
604		s->s3->rbuf.buf = p;
605		s->s3->rbuf.len = len;
606		}
607
608	if (s->s3->wbuf.buf == NULL)
609		{
610		len = SSL3_RT_MAX_PACKET_SIZE;
611		len += SSL3_RT_HEADER_LENGTH + 256; /* extra space for empty fragment */
612		if ((p=OPENSSL_malloc(len)) == NULL)
613			goto err;
614		s->s3->wbuf.buf = p;
615		s->s3->wbuf.len = len;
616		}
617	s->packet= &(s->s3->rbuf.buf[0]);
618	return(1);
619err:
620	SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
621	return(0);
622	}
623