For consistency, set s->init_num in the 'reuse_message' case
[openssl.git] / ssl / s3_both.c
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) 1998-2000 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 <openssl/buffer.h>
116 #include <openssl/rand.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
119 #include <openssl/x509.h>
120 #include "ssl_locl.h"
121
122 /* send s->init_buf in records of type 'type' */
123 int 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                 return(1);
137         s->init_off+=ret;
138         s->init_num-=ret;
139         return(0);
140         }
141
142 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
143         {
144         unsigned char *p,*d;
145         int i;
146         unsigned long l;
147
148         if (s->state == a)
149                 {
150                 d=(unsigned char *)s->init_buf->data;
151                 p= &(d[4]);
152
153                 i=s->method->ssl3_enc->final_finish_mac(s,
154                         &(s->s3->finish_dgst1),
155                         &(s->s3->finish_dgst2),
156                         sender,slen,s->s3->tmp.finish_md);
157                 s->s3->tmp.finish_md_len = i;
158                 memcpy(p, s->s3->tmp.finish_md, i);
159                 p+=i;
160                 l=i;
161
162 #ifdef OPENSSL_SYS_WIN16
163                 /* MSVC 1.5 does not clear the top bytes of the word unless
164                  * I do this.
165                  */
166                 l&=0xffff;
167 #endif
168
169                 *(d++)=SSL3_MT_FINISHED;
170                 l2n3(l,d);
171                 s->init_num=(int)l+4;
172                 s->init_off=0;
173
174                 s->state=b;
175                 }
176
177         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
178         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
179         }
180
181 int ssl3_get_finished(SSL *s, int a, int b)
182         {
183         int al,i,ok;
184         long n;
185         unsigned char *p;
186
187         /* the mac has already been generated when we received the
188          * change cipher spec message and is in s->s3->tmp.peer_finish_md
189          */ 
190
191         n=ssl3_get_message(s,
192                 a,
193                 b,
194                 SSL3_MT_FINISHED,
195                 64, /* should actually be 36+4 :-) */
196                 &ok);
197
198         if (!ok) return((int)n);
199
200         /* If this occurs, we have missed a message */
201         if (!s->s3->change_cipher_spec)
202                 {
203                 al=SSL_AD_UNEXPECTED_MESSAGE;
204                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
205                 goto f_err;
206                 }
207         s->s3->change_cipher_spec=0;
208
209         p = (unsigned char *)s->init_msg;
210         i = s->s3->tmp.peer_finish_md_len;
211
212         if (i != n)
213                 {
214                 al=SSL_AD_DECODE_ERROR;
215                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
216                 goto f_err;
217                 }
218
219         if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
220                 {
221                 al=SSL_AD_DECRYPT_ERROR;
222                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
223                 goto f_err;
224                 }
225
226         return(1);
227 f_err:
228         ssl3_send_alert(s,SSL3_AL_FATAL,al);
229         return(0);
230         }
231
232 /* for these 2 messages, we need to
233  * ssl->enc_read_ctx                    re-init
234  * ssl->s3->read_sequence               zero
235  * ssl->s3->read_mac_secret             re-init
236  * ssl->session->read_sym_enc           assign
237  * ssl->session->read_compression       assign
238  * ssl->session->read_hash              assign
239  */
240 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
241         { 
242         unsigned char *p;
243
244         if (s->state == a)
245                 {
246                 p=(unsigned char *)s->init_buf->data;
247                 *p=SSL3_MT_CCS;
248                 s->init_num=1;
249                 s->init_off=0;
250
251                 s->state=b;
252                 }
253
254         /* SSL3_ST_CW_CHANGE_B */
255         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
256         }
257
258 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
259         {
260         unsigned char *p;
261         int n,i;
262         unsigned long l=7;
263         BUF_MEM *buf;
264         X509_STORE_CTX xs_ctx;
265         X509_OBJECT obj;
266
267         /* TLSv1 sends a chain with nothing in it, instead of an alert */
268         buf=s->init_buf;
269         if (!BUF_MEM_grow(buf,(int)(10)))
270                 {
271                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
272                 return(0);
273                 }
274         if (x != NULL)
275                 {
276                 if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
277                         {
278                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
279                         return(0);
280                         }
281
282                 for (;;)
283                         {
284                         n=i2d_X509(x,NULL);
285                         if (!BUF_MEM_grow(buf,(int)(n+l+3)))
286                                 {
287                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
288                                 return(0);
289                                 }
290                         p=(unsigned char *)&(buf->data[l]);
291                         l2n3(n,p);
292                         i2d_X509(x,&p);
293                         l+=n+3;
294                         if (X509_NAME_cmp(X509_get_subject_name(x),
295                                 X509_get_issuer_name(x)) == 0) break;
296
297                         i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
298                                 X509_get_issuer_name(x),&obj);
299                         if (i <= 0) break;
300                         x=obj.data.x509;
301                         /* Count is one too high since the X509_STORE_get uped the
302                          * ref count */
303                         X509_free(x);
304                         }
305
306                 X509_STORE_CTX_cleanup(&xs_ctx);
307                 }
308
309         /* Thawte special :-) */
310         if (s->ctx->extra_certs != NULL)
311         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
312                 {
313                 x=sk_X509_value(s->ctx->extra_certs,i);
314                 n=i2d_X509(x,NULL);
315                 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
316                         {
317                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
318                         return(0);
319                         }
320                 p=(unsigned char *)&(buf->data[l]);
321                 l2n3(n,p);
322                 i2d_X509(x,&p);
323                 l+=n+3;
324                 }
325
326         l-=7;
327         p=(unsigned char *)&(buf->data[4]);
328         l2n3(l,p);
329         l+=3;
330         p=(unsigned char *)&(buf->data[0]);
331         *(p++)=SSL3_MT_CERTIFICATE;
332         l2n3(l,p);
333         l+=4;
334         return(l);
335         }
336
337 /* Obtain handshake message of message type 'mt' (any if mt == -1),
338  * maximum acceptable body length 'max'.
339  * The first four bytes (msg_type and length) are read in state 'st1',
340  * the body is read in state 'stn'.
341  */
342 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
343         {
344         unsigned char *p;
345         unsigned long l;
346         long n;
347         int i,al;
348
349         if (s->s3->tmp.reuse_message)
350                 {
351                 s->s3->tmp.reuse_message=0;
352                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
353                         {
354                         al=SSL_AD_UNEXPECTED_MESSAGE;
355                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
356                         goto f_err;
357                         }
358                 *ok=1;
359                 s->init_msg = s->init_buf->data + 4;
360                 s->init_num = (int)s->s3->tmp.message_size;
361                 return s->init_num;
362                 }
363
364         p=(unsigned char *)s->init_buf->data;
365
366         if (s->state == st1) /* s->init_num < 4 */
367                 {
368                 int skip_message;
369
370                 do
371                         {
372                         while (s->init_num < 4)
373                                 {
374                                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
375                                         4 - s->init_num, 0);
376                                 if (i <= 0)
377                                         {
378                                         s->rwstate=SSL_READING;
379                                         *ok = 0;
380                                         return i;
381                                         }
382                                 s->init_num+=i;
383                                 }
384                         
385                         skip_message = 0;
386                         if (!s->server)
387                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
388                                         /* The server may always send 'Hello Request' messages --
389                                          * we are doing a handshake anyway now, so ignore them
390                                          * if their format is correct. Does not count for
391                                          * 'Finished' MAC. */
392                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
393                                                 {
394                                                 s->init_num = 0;
395                                                 skip_message = 1;
396                                                 }
397                         
398                         }
399                 while (skip_message);
400
401                 /* s->init_num == 4 */
402
403                 if ((mt >= 0) && (*p != mt))
404                         {
405                         al=SSL_AD_UNEXPECTED_MESSAGE;
406                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
407                         goto f_err;
408                         }
409                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
410                                         (st1 == SSL3_ST_SR_CERT_A) &&
411                                         (stn == SSL3_ST_SR_CERT_B))
412                         {
413                         /* At this point we have got an MS SGC second client
414                          * hello (maybe we should always allow the client to
415                          * start a new handshake?). We need to restart the mac.
416                          * Don't increment {num,total}_renegotiations because
417                          * we have not completed the handshake. */
418                         ssl3_init_finished_mac(s);
419                         }
420
421                 s->s3->tmp.message_type= *(p++);
422
423                 n2l3(p,l);
424                 if (l > (unsigned long)max)
425                         {
426                         al=SSL_AD_ILLEGAL_PARAMETER;
427                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
428                         goto f_err;
429                         }
430                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
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 && !BUF_MEM_grow(s->init_buf,(int)l+4))
437                         {
438                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
439                         goto err;
440                         }
441                 s->s3->tmp.message_size=l;
442                 s->state=stn;
443
444                 s->init_msg = s->init_buf->data + 4;
445                 s->init_num = 0;
446                 }
447
448         /* next state (stn) */
449         p = s->init_msg;
450         n = s->s3->tmp.message_size - s->init_num;
451         while (n > 0)
452                 {
453                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
454                 if (i <= 0)
455                         {
456                         s->rwstate=SSL_READING;
457                         *ok = 0;
458                         return i;
459                         }
460                 s->init_num += i;
461                 n -= i;
462                 }
463         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
464         *ok=1;
465         return s->init_num;
466 f_err:
467         ssl3_send_alert(s,SSL3_AL_FATAL,al);
468 err:
469         *ok=0;
470         return(-1);
471         }
472
473 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
474         {
475         EVP_PKEY *pk;
476         int ret= -1,i,j;
477
478         if (pkey == NULL)
479                 pk=X509_get_pubkey(x);
480         else
481                 pk=pkey;
482         if (pk == NULL) goto err;
483
484         i=pk->type;
485         if (i == EVP_PKEY_RSA)
486                 {
487                 ret=SSL_PKEY_RSA_ENC;
488                 if (x != NULL)
489                         {
490                         j=X509_get_ext_count(x);
491                         /* check to see if this is a signing only certificate */
492                         /* EAY EAY EAY EAY */
493                         }
494                 }
495         else if (i == EVP_PKEY_DSA)
496                 {
497                 ret=SSL_PKEY_DSA_SIGN;
498                 }
499         else if (i == EVP_PKEY_DH)
500                 {
501                 /* if we just have a key, we needs to be guess */
502
503                 if (x == NULL)
504                         ret=SSL_PKEY_DH_DSA;
505                 else
506                         {
507                         j=X509_get_signature_type(x);
508                         if (j == EVP_PKEY_RSA)
509                                 ret=SSL_PKEY_DH_RSA;
510                         else if (j== EVP_PKEY_DSA)
511                                 ret=SSL_PKEY_DH_DSA;
512                         else ret= -1;
513                         }
514                 }
515         else
516                 ret= -1;
517
518 err:
519         if(!pkey) EVP_PKEY_free(pk);
520         return(ret);
521         }
522
523 int ssl_verify_alarm_type(long type)
524         {
525         int al;
526
527         switch(type)
528                 {
529         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
530         case X509_V_ERR_UNABLE_TO_GET_CRL:
531         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
532                 al=SSL_AD_UNKNOWN_CA;
533                 break;
534         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
535         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
536         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
537         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
538         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
539         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
540         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
541         case X509_V_ERR_CERT_NOT_YET_VALID:
542         case X509_V_ERR_CRL_NOT_YET_VALID:
543                 al=SSL_AD_BAD_CERTIFICATE;
544                 break;
545         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
546         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
547                 al=SSL_AD_DECRYPT_ERROR;
548                 break;
549         case X509_V_ERR_CERT_HAS_EXPIRED:
550         case X509_V_ERR_CRL_HAS_EXPIRED:
551                 al=SSL_AD_CERTIFICATE_EXPIRED;
552                 break;
553         case X509_V_ERR_CERT_REVOKED:
554                 al=SSL_AD_CERTIFICATE_REVOKED;
555                 break;
556         case X509_V_ERR_OUT_OF_MEM:
557                 al=SSL_AD_INTERNAL_ERROR;
558                 break;
559         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
560         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
561         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
562         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
563         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
564                 al=SSL_AD_UNKNOWN_CA;
565                 break;
566         case X509_V_ERR_APPLICATION_VERIFICATION:
567                 al=SSL_AD_HANDSHAKE_FAILURE;
568                 break;
569         default:
570                 al=SSL_AD_CERTIFICATE_UNKNOWN;
571                 break;
572                 }
573         return(al);
574         }
575
576 int ssl3_setup_buffers(SSL *s)
577         {
578         unsigned char *p;
579         unsigned int extra;
580
581         if (s->s3->rbuf.buf == NULL)
582                 {
583                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
584                         extra=SSL3_RT_MAX_EXTRA;
585                 else
586                         extra=0;
587                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
588                         == NULL)
589                         goto err;
590                 s->s3->rbuf.buf=p;
591                 }
592
593         if (s->s3->wbuf.buf == NULL)
594                 {
595                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE))
596                         == NULL)
597                         goto err;
598                 s->s3->wbuf.buf=p;
599                 }
600         s->packet= &(s->s3->rbuf.buf[0]);
601         return(1);
602 err:
603         SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
604         return(0);
605         }