c3b4e1d1c7557aa98aa5bbe1532ef84844c678d3
[openssl.git] / ssl / s2_srvr.c
1 /* ssl/s2_srvr.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) 1998-2001 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 "ssl_locl.h"
113 #ifndef OPENSSL_NO_SSL2
114 #include <stdio.h>
115 #include <openssl/bio.h>
116 #include <openssl/rand.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
119
120 static const SSL_METHOD *ssl2_get_server_method(int ver);
121 static int get_client_master_key(SSL *s);
122 static int get_client_hello(SSL *s);
123 static int server_hello(SSL *s); 
124 static int get_client_finished(SSL *s);
125 static int server_verify(SSL *s);
126 static int server_finish(SSL *s);
127 static int request_certificate(SSL *s);
128 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
129         unsigned char *to,int padding);
130 #define BREAK   break
131
132 static const SSL_METHOD *ssl2_get_server_method(int ver)
133         {
134         if (ver == SSL2_VERSION)
135                 return(SSLv2_server_method());
136         else
137                 return(NULL);
138         }
139
140 IMPLEMENT_ssl2_meth_func(SSLv2_server_method,
141                         ssl2_accept,
142                         ssl_undefined_function,
143                         ssl2_get_server_method)
144
145 int ssl2_accept(SSL *s)
146         {
147         unsigned long l=(unsigned long)time(NULL);
148         BUF_MEM *buf=NULL;
149         int ret= -1;
150         long num1;
151         void (*cb)(const SSL *ssl,int type,int val)=NULL;
152         int new_state,state;
153
154         RAND_add(&l,sizeof(l),0);
155         ERR_clear_error();
156         clear_sys_error();
157
158         if (s->info_callback != NULL)
159                 cb=s->info_callback;
160         else if (s->ctx->info_callback != NULL)
161                 cb=s->ctx->info_callback;
162
163         /* init things to blank */
164         s->in_handshake++;
165         if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
166
167         if (s->cert == NULL)
168                 {
169                 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
170                 return(-1);
171                 }
172
173         clear_sys_error();
174         for (;;)
175                 {
176                 state=s->state;
177
178                 switch (s->state)
179                         {
180                 case SSL_ST_BEFORE:
181                 case SSL_ST_ACCEPT:
182                 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
183                 case SSL_ST_OK|SSL_ST_ACCEPT:
184
185                         s->server=1;
186                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
187
188                         s->version=SSL2_VERSION;
189                         s->type=SSL_ST_ACCEPT;
190
191                         buf=s->init_buf;
192                         if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
193                                 { ret= -1; goto end; }
194                         if (!BUF_MEM_grow(buf,(int)
195                                 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
196                                 { ret= -1; goto end; }
197                         s->init_buf=buf;
198                         s->init_num=0;
199                         s->ctx->stats.sess_accept++;
200                         s->handshake_func=ssl2_accept;
201                         s->state=SSL2_ST_GET_CLIENT_HELLO_A;
202                         BREAK;
203
204                 case SSL2_ST_GET_CLIENT_HELLO_A:
205                 case SSL2_ST_GET_CLIENT_HELLO_B:
206                 case SSL2_ST_GET_CLIENT_HELLO_C:
207                         s->shutdown=0;
208                         ret=get_client_hello(s);
209                         if (ret <= 0) goto end;
210                         s->init_num=0;
211                         s->state=SSL2_ST_SEND_SERVER_HELLO_A;
212                         BREAK;
213
214                 case SSL2_ST_SEND_SERVER_HELLO_A:
215                 case SSL2_ST_SEND_SERVER_HELLO_B:
216                         ret=server_hello(s);
217                         if (ret <= 0) goto end;
218                         s->init_num=0;
219                         if (!s->hit)
220                                 {
221                                 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
222                                 BREAK;
223                                 }
224                         else
225                                 {
226                                 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
227                                 BREAK;
228                                 }
229                 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
230                 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
231                         ret=get_client_master_key(s);
232                         if (ret <= 0) goto end;
233                         s->init_num=0;
234                         s->state=SSL2_ST_SERVER_START_ENCRYPTION;
235                         BREAK;
236
237                 case SSL2_ST_SERVER_START_ENCRYPTION:
238                         /* Ok we how have sent all the stuff needed to
239                          * start encrypting, the next packet back will
240                          * be encrypted. */
241                         if (!ssl2_enc_init(s,0))
242                                 { ret= -1; goto end; }
243                         s->s2->clear_text=0;
244                         s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
245                         BREAK;
246
247                 case SSL2_ST_SEND_SERVER_VERIFY_A:
248                 case SSL2_ST_SEND_SERVER_VERIFY_B:
249                         ret=server_verify(s);
250                         if (ret <= 0) goto end;
251                         s->init_num=0;
252                         if (s->hit)
253                                 {
254                                 /* If we are in here, we have been
255                                  * buffering the output, so we need to
256                                  * flush it and remove buffering from
257                                  * future traffic */
258                                 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
259                                 BREAK;
260                                 }
261                         else
262                                 {
263                                 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
264                                 break;
265                                 }
266
267                 case SSL2_ST_SEND_SERVER_VERIFY_C:
268                         /* get the number of bytes to write */
269                         num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
270                         if (num1 != 0)
271                                 {
272                                 s->rwstate=SSL_WRITING;
273                                 num1=BIO_flush(s->wbio);
274                                 if (num1 <= 0) { ret= -1; goto end; }
275                                 s->rwstate=SSL_NOTHING;
276                                 }
277
278                         /* flushed and now remove buffering */
279                         s->wbio=BIO_pop(s->wbio);
280
281                         s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
282                         BREAK;
283
284                 case SSL2_ST_GET_CLIENT_FINISHED_A:
285                 case SSL2_ST_GET_CLIENT_FINISHED_B:
286                         ret=get_client_finished(s);
287                         if (ret <= 0)
288                                 goto end;
289                         s->init_num=0;
290                         s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
291                         BREAK;
292
293                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
294                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
295                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
296                 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
297                         /* don't do a 'request certificate' if we
298                          * don't want to, or we already have one, and
299                          * we only want to do it once. */
300                         if (!(s->verify_mode & SSL_VERIFY_PEER) ||
301                                 ((s->session->peer != NULL) &&
302                                 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
303                                 {
304                                 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
305                                 break;
306                                 }
307                         else
308                                 {
309                                 ret=request_certificate(s);
310                                 if (ret <= 0) goto end;
311                                 s->init_num=0;
312                                 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
313                                 }
314                         BREAK;
315
316                 case SSL2_ST_SEND_SERVER_FINISHED_A:
317                 case SSL2_ST_SEND_SERVER_FINISHED_B:
318                         ret=server_finish(s);
319                         if (ret <= 0) goto end;
320                         s->init_num=0;
321                         s->state=SSL_ST_OK;
322                         break;
323
324                 case SSL_ST_OK:
325                         BUF_MEM_free(s->init_buf);
326                         ssl_free_wbio_buffer(s);
327                         s->init_buf=NULL;
328                         s->init_num=0;
329                 /*      ERR_clear_error();*/
330
331                         ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
332
333                         s->ctx->stats.sess_accept_good++;
334                         /* s->server=1; */
335                         ret=1;
336
337                         if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
338
339                         goto end;
340                         /* BREAK; */
341
342                 default:
343                         SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
344                         ret= -1;
345                         goto end;
346                         /* BREAK; */
347                         }
348                 
349                 if ((cb != NULL) && (s->state != state))
350                         {
351                         new_state=s->state;
352                         s->state=state;
353                         cb(s,SSL_CB_ACCEPT_LOOP,1);
354                         s->state=new_state;
355                         }
356                 }
357 end:
358         s->in_handshake--;
359         if (cb != NULL)
360                 cb(s,SSL_CB_ACCEPT_EXIT,ret);
361         return(ret);
362         }
363
364 static int get_client_master_key(SSL *s)
365         {
366         int is_export,i,n,keya,ek;
367         unsigned long len;
368         unsigned char *p;
369         const SSL_CIPHER *cp;
370         const EVP_CIPHER *c;
371         const EVP_MD *md;
372
373         p=(unsigned char *)s->init_buf->data;
374         if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
375                 {
376                 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
377
378                 if (i < (10-s->init_num))
379                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
380                 s->init_num = 10;
381
382                 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
383                         {
384                         if (p[-1] != SSL2_MT_ERROR)
385                                 {
386                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
387                                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
388                                 }
389                         else
390                                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
391                         return(-1);
392                         }
393
394                 cp=ssl2_get_cipher_by_char(p);
395                 if (cp == NULL)
396                         {
397                         ssl2_return_error(s,SSL2_PE_NO_CIPHER);
398                         SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
399                         return(-1);
400                         }
401                 s->session->cipher= cp;
402
403                 p+=3;
404                 n2s(p,i); s->s2->tmp.clear=i;
405                 n2s(p,i); s->s2->tmp.enc=i;
406                 n2s(p,i); s->session->key_arg_length=i;
407                 if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
408                         {
409                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
410                         SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
411                         return -1;
412                         }
413                 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
414                 }
415
416         /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
417         p=(unsigned char *)s->init_buf->data;
418         if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
419                 {
420                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
421                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
422                 return -1;
423                 }
424         keya=s->session->key_arg_length;
425         len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
426         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
427                 {
428                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
429                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
430                 return -1;
431                 }
432         n = (int)len - s->init_num;
433         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
434         if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
435         if (s->msg_callback)
436                 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
437         p += 10;
438
439         memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
440                 (unsigned int)keya);
441
442         if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
443                 {
444                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
445                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
446                 return(-1);
447                 }
448         i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
449                 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
450                 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
451
452         is_export=SSL_C_IS_EXPORT(s->session->cipher);
453         
454         if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
455                 {
456                 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
457                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
458                 return(0);
459                 }
460
461         if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
462                 {
463                 is_export=1;
464                 ek=8;
465                 }
466         else
467                 ek=5;
468
469         /* bad decrypt */
470 #if 1
471         /* If a bad decrypt, continue with protocol but with a
472          * random master secret (Bleichenbacher attack) */
473         if ((i < 0) ||
474                 ((!is_export && (i != EVP_CIPHER_key_length(c)))
475                 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
476                         (unsigned int)EVP_CIPHER_key_length(c))))))
477                 {
478                 ERR_clear_error();
479                 if (is_export)
480                         i=ek;
481                 else
482                         i=EVP_CIPHER_key_length(c);
483                 if (RAND_pseudo_bytes(p,i) <= 0)
484                         return 0;
485                 }
486 #else
487         if (i < 0)
488                 {
489                 error=1;
490                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
491                 }
492         /* incorrect number of key bytes for non export cipher */
493         else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
494                 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
495                         EVP_CIPHER_key_length(c)))))
496                 {
497                 error=1;
498                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
499                 }
500         if (error)
501                 {
502                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
503                 return(-1);
504                 }
505 #endif
506
507         if (is_export) i+=s->s2->tmp.clear;
508
509         if (i > SSL_MAX_MASTER_KEY_LENGTH)
510                 {
511                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
512                 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
513                 return -1;
514                 }
515         s->session->master_key_length=i;
516         memcpy(s->session->master_key,p,(unsigned int)i);
517         return(1);
518         }
519
520 static int get_client_hello(SSL *s)
521         {
522         int i,n;
523         unsigned long len;
524         unsigned char *p;
525         STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
526         STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
527         STACK_OF(SSL_CIPHER) *prio, *allow;
528         int z;
529
530         /* This is a bit of a hack to check for the correct packet
531          * type the first time round. */
532         if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
533                 {
534                 s->first_packet=1;
535                 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
536                 }
537
538         p=(unsigned char *)s->init_buf->data;
539         if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
540                 {
541                 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
542                 if (i < (9-s->init_num)) 
543                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
544                 s->init_num = 9;
545         
546                 if (*(p++) != SSL2_MT_CLIENT_HELLO)
547                         {
548                         if (p[-1] != SSL2_MT_ERROR)
549                                 {
550                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
551                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
552                                 }
553                         else
554                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
555                         return(-1);
556                         }
557                 n2s(p,i);
558                 if (i < s->version) s->version=i;
559                 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
560                 n2s(p,i); s->s2->tmp.session_id_length=i;
561                 n2s(p,i); s->s2->challenge_length=i;
562                 if (    (i < SSL2_MIN_CHALLENGE_LENGTH) ||
563                         (i > SSL2_MAX_CHALLENGE_LENGTH))
564                         {
565                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
566                         SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
567                         return(-1);
568                         }
569                 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
570                 }
571
572         /* SSL2_ST_GET_CLIENT_HELLO_C */
573         p=(unsigned char *)s->init_buf->data;
574         len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
575         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
576                 {
577                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
578                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
579                 return -1;
580                 }
581         n = (int)len - s->init_num;
582         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
583         if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
584         if (s->msg_callback)
585                 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
586         p += 9;
587
588         /* get session-id before cipher stuff so we can get out session
589          * structure if it is cached */
590         /* session-id */
591         if ((s->s2->tmp.session_id_length != 0) && 
592                 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
593                 {
594                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
595                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
596                 return(-1);
597                 }
598
599         if (s->s2->tmp.session_id_length == 0)
600                 {
601                 if (!ssl_get_new_session(s,1))
602                         {
603                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
604                         return(-1);
605                         }
606                 }
607         else
608                 {
609                 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
610                         s->s2->tmp.session_id_length, NULL);
611                 if (i == 1)
612                         { /* previous session */
613                         s->hit=1;
614                         }
615                 else if (i == -1)
616                         {
617                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
618                         return(-1);
619                         }
620                 else
621                         {
622                         if (s->cert == NULL)
623                                 {
624                                 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
625                                 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
626                                 return(-1);
627                                 }
628
629                         if (!ssl_get_new_session(s,1))
630                                 {
631                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
632                                 return(-1);
633                                 }
634                         }
635                 }
636
637         if (!s->hit)
638                 {
639                 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
640                         &s->session->ciphers);
641                 if (cs == NULL) goto mem_err;
642
643                 cl=SSL_get_ciphers(s);
644
645                 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
646                     {
647                     prio=sk_SSL_CIPHER_dup(cl);
648                     if (prio == NULL) goto mem_err;
649                     allow = cs;
650                     }
651                 else
652                     {
653                     prio = cs;
654                     allow = cl;
655                     }
656                 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
657                         {
658                         if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
659                                 {
660                                 (void)sk_SSL_CIPHER_delete(prio,z);
661                                 z--;
662                                 }
663                         }
664                 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
665                     {
666                     sk_SSL_CIPHER_free(s->session->ciphers);
667                     s->session->ciphers = prio;
668                     }
669                 /* s->session->ciphers should now have a list of
670                  * ciphers that are on both the client and server.
671                  * This list is ordered by the order the client sent
672                  * the ciphers or in the order of the server's preference
673                  * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
674                  */
675                 }
676         p+=s->s2->tmp.cipher_spec_length;
677         /* done cipher selection */
678
679         /* session id extracted already */
680         p+=s->s2->tmp.session_id_length;
681
682         /* challenge */
683         if (s->s2->challenge_length > sizeof s->s2->challenge)
684                 {
685                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
686                 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
687                 return -1;
688                 }
689         memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
690         return(1);
691 mem_err:
692         SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
693         return(0);
694         }
695
696 static int server_hello(SSL *s)
697         {
698         unsigned char *p,*d;
699         int n,hit;
700         STACK_OF(SSL_CIPHER) *sk;
701
702         p=(unsigned char *)s->init_buf->data;
703         if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
704                 {
705                 d=p+11;
706                 *(p++)=SSL2_MT_SERVER_HELLO;            /* type */
707                 hit=s->hit;
708                 *(p++)=(unsigned char)hit;
709 #if 1
710                 if (!hit)
711                         {
712                         if (s->session->sess_cert != NULL)
713                                 /* This can't really happen because get_client_hello
714                                  * has called ssl_get_new_session, which does not set
715                                  * sess_cert. */
716                                 ssl_sess_cert_free(s->session->sess_cert);
717                         s->session->sess_cert = ssl_sess_cert_new();
718                         if (s->session->sess_cert == NULL)
719                                 {
720                                 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
721                                 return(-1);
722                                 }
723                         }
724                 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
725                  * depending on whether it survived in the internal cache
726                  * or was retrieved from an external cache.
727                  * If it is NULL, we cannot put any useful data in it anyway,
728                  * so we don't touch it.
729                  */
730
731 #else /* That's what used to be done when cert_st and sess_cert_st were
732            * the same. */
733                 if (!hit)
734                         {                       /* else add cert to session */
735                         CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
736                         if (s->session->sess_cert != NULL)
737                                 ssl_cert_free(s->session->sess_cert);
738                         s->session->sess_cert=s->cert;          
739                         }
740                 else    /* We have a session id-cache hit, if the
741                          * session-id has no certificate listed against
742                          * the 'cert' structure, grab the 'old' one
743                          * listed against the SSL connection */
744                         {
745                         if (s->session->sess_cert == NULL)
746                                 {
747                                 CRYPTO_add(&s->cert->references,1,
748                                         CRYPTO_LOCK_SSL_CERT);
749                                 s->session->sess_cert=s->cert;
750                                 }
751                         }
752 #endif
753
754                 if (s->cert == NULL)
755                         {
756                         ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
757                         SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
758                         return(-1);
759                         }
760
761                 if (hit)
762                         {
763                         *(p++)=0;               /* no certificate type */
764                         s2n(s->version,p);      /* version */
765                         s2n(0,p);               /* cert len */
766                         s2n(0,p);               /* ciphers len */
767                         }
768                 else
769                         {
770                         /* EAY EAY */
771                         /* put certificate type */
772                         *(p++)=SSL2_CT_X509_CERTIFICATE;
773                         s2n(s->version,p);      /* version */
774                         n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
775                         s2n(n,p);               /* certificate length */
776                         i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
777                         n=0;
778                         
779                         /* lets send out the ciphers we like in the
780                          * prefered order */
781                         sk= s->session->ciphers;
782                         n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0);
783                         d+=n;
784                         s2n(n,p);               /* add cipher length */
785                         }
786
787                 /* make and send conn_id */
788                 s2n(SSL2_CONNECTION_ID_LENGTH,p);       /* add conn_id length */
789                 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
790                 if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0)
791                         return -1;
792                 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
793                 d+=SSL2_CONNECTION_ID_LENGTH;
794
795                 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
796                 s->init_num=d-(unsigned char *)s->init_buf->data;
797                 s->init_off=0;
798                 }
799         /* SSL2_ST_SEND_SERVER_HELLO_B */
800         /* If we are using TCP/IP, the performance is bad if we do 2
801          * writes without a read between them.  This occurs when
802          * Session-id reuse is used, so I will put in a buffering module
803          */
804         if (s->hit)
805                 {
806                 if (!ssl_init_wbio_buffer(s,1)) return(-1);
807                 }
808  
809         return(ssl2_do_write(s));
810         }
811
812 static int get_client_finished(SSL *s)
813         {
814         unsigned char *p;
815         int i, n;
816         unsigned long len;
817
818         p=(unsigned char *)s->init_buf->data;
819         if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
820                 {
821                 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
822                 if (i < 1-s->init_num)
823                         return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
824                 s->init_num += i;
825
826                 if (*p != SSL2_MT_CLIENT_FINISHED)
827                         {
828                         if (*p != SSL2_MT_ERROR)
829                                 {
830                                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
831                                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
832                                 }
833                         else
834                                 {
835                                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
836                                 /* try to read the error message */
837                                 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
838                                 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
839                                 }
840                         return(-1);
841                         }
842                 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
843                 }
844
845         /* SSL2_ST_GET_CLIENT_FINISHED_B */
846         if (s->s2->conn_id_length > sizeof s->s2->conn_id)
847                 {
848                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
849                 SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
850                 return -1;
851                 }
852         len = 1 + (unsigned long)s->s2->conn_id_length;
853         n = (int)len - s->init_num;
854         i = ssl2_read(s,(char *)&(p[s->init_num]),n);
855         if (i < n)
856                 {
857                 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
858                 }
859         if (s->msg_callback)
860                 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
861         p += 1;
862         if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
863                 {
864                 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
865                 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
866                 return(-1);
867                 }
868         return(1);
869         }
870
871 static int server_verify(SSL *s)
872         {
873         unsigned char *p;
874
875         if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
876                 {
877                 p=(unsigned char *)s->init_buf->data;
878                 *(p++)=SSL2_MT_SERVER_VERIFY;
879                 if (s->s2->challenge_length > sizeof s->s2->challenge)
880                         {
881                         SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
882                         return -1;
883                         }
884                 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
885                 /* p+=s->s2->challenge_length; */
886
887                 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
888                 s->init_num=s->s2->challenge_length+1;
889                 s->init_off=0;
890                 }
891         return(ssl2_do_write(s));
892         }
893
894 static int server_finish(SSL *s)
895         {
896         unsigned char *p;
897
898         if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
899                 {
900                 p=(unsigned char *)s->init_buf->data;
901                 *(p++)=SSL2_MT_SERVER_FINISHED;
902
903                 if (s->session->session_id_length > sizeof s->session->session_id)
904                         {
905                         SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
906                         return -1;
907                         }
908                 memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
909                 /* p+=s->session->session_id_length; */
910
911                 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
912                 s->init_num=s->session->session_id_length+1;
913                 s->init_off=0;
914                 }
915
916         /* SSL2_ST_SEND_SERVER_FINISHED_B */
917         return(ssl2_do_write(s));
918         }
919
920 /* send the request and check the response */
921 static int request_certificate(SSL *s)
922         {
923         const unsigned char *cp;
924         unsigned char *p,*p2,*buf2;
925         unsigned char *ccd;
926         int i,j,ctype,ret= -1;
927         unsigned long len;
928         X509 *x509=NULL;
929         STACK_OF(X509) *sk=NULL;
930
931         ccd=s->s2->tmp.ccl;
932         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
933                 {
934                 p=(unsigned char *)s->init_buf->data;
935                 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
936                 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
937                 if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0)
938                         return -1;
939                 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
940
941                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
942                 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
943                 s->init_off=0;
944                 }
945
946         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
947                 {
948                 i=ssl2_do_write(s);
949                 if (i <= 0)
950                         {
951                         ret=i;
952                         goto end;
953                         }
954
955                 s->init_num=0;
956                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
957                 }
958
959         if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
960                 {
961                 p=(unsigned char *)s->init_buf->data;
962                 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
963                 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
964                                         * (probably NO-CERTIFICATE-ERROR) */
965                         {
966                         ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
967                         goto end;
968                         }
969                 s->init_num += i;
970
971                 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
972                         {
973                         n2s(p,i);
974                         if (i != SSL2_PE_NO_CERTIFICATE)
975                                 {
976                                 /* not the error message we expected -- let ssl2_part_read handle it */
977                                 s->init_num -= 3;
978                                 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
979                                 goto end;
980                                 }
981
982                         if (s->msg_callback)
983                                 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
984
985                         /* this is the one place where we can recover from an SSL 2.0 error */
986
987                         if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
988                                 {
989                                 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
990                                 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
991                                 goto end;
992                                 }
993                         ret=1;
994                         goto end;
995                         }
996                 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
997                         {
998                         ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
999                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
1000                         goto end;
1001                         }
1002                 if (s->init_num != 6)
1003                         {
1004                         SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1005                         goto end;
1006                         }
1007                 
1008                 /* ok we have a response */
1009                 /* certificate type, there is only one right now. */
1010                 ctype= *(p++);
1011                 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
1012                         {
1013                         ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
1014                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
1015                         goto end;
1016                         }
1017                 n2s(p,i); s->s2->tmp.clen=i;
1018                 n2s(p,i); s->s2->tmp.rlen=i;
1019                 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
1020                 }
1021
1022         /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1023         p=(unsigned char *)s->init_buf->data;
1024         len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
1025         if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
1026                 {
1027                 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
1028                 goto end;
1029                 }
1030         j = (int)len - s->init_num;
1031         i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1032         if (i < j) 
1033                 {
1034                 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1035                 goto end;
1036                 }
1037         if (s->msg_callback)
1038                 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1039         p += 6;
1040
1041         cp = p;
1042         x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen);
1043         if (x509 == NULL)
1044                 {
1045                 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1046                 goto msg_end;
1047                 }
1048
1049         if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1050                 {
1051                 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1052                 goto msg_end;
1053                 }
1054
1055         i=ssl_verify_cert_chain(s,sk);
1056
1057         if (i > 0)      /* we like the packet, now check the chksum */
1058                 {
1059                 EVP_MD_CTX ctx;
1060                 EVP_PKEY *pkey=NULL;
1061
1062                 EVP_MD_CTX_init(&ctx);
1063                 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1064                 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1065                                  s->s2->key_material_length);
1066                 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1067
1068                 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1069                 buf2=OPENSSL_malloc((unsigned int)i);
1070                 if (buf2 == NULL)
1071                         {
1072                         SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1073                         goto msg_end;
1074                         }
1075                 p2=buf2;
1076                 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1077                 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1078                 OPENSSL_free(buf2);
1079
1080                 pkey=X509_get_pubkey(x509);
1081                 if (pkey == NULL) goto end;
1082                 i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey);
1083                 EVP_PKEY_free(pkey);
1084                 EVP_MD_CTX_cleanup(&ctx);
1085
1086                 if (i > 0)
1087                         {
1088                         if (s->session->peer != NULL)
1089                                 X509_free(s->session->peer);
1090                         s->session->peer=x509;
1091                         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1092                         s->session->verify_result = s->verify_result;
1093                         ret=1;
1094                         goto end;
1095                         }
1096                 else
1097                         {
1098                         SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1099                         goto msg_end;
1100                         }
1101                 }
1102         else
1103                 {
1104 msg_end:
1105                 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1106                 }
1107 end:
1108         sk_X509_free(sk);
1109         X509_free(x509);
1110         return(ret);
1111         }
1112
1113 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1114              unsigned char *to, int padding)
1115         {
1116         RSA *rsa;
1117         int i;
1118
1119         if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1120                 {
1121                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1122                 return(-1);
1123                 }
1124         if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1125                 {
1126                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1127                 return(-1);
1128                 }
1129         rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1130
1131         /* we have the public key */
1132         i=RSA_private_decrypt(len,from,to,rsa,padding);
1133         if (i < 0)
1134                 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1135         return(i);
1136         }
1137 #else /* !OPENSSL_NO_SSL2 */
1138
1139 # if PEDANTIC
1140 static void *dummy=&dummy;
1141 # endif
1142
1143 #endif