3b6c364b016c6e192cc0a5560163c55d16f7c315
[openssl.git] / ssl / ssl_lib.c
1 /*! \file ssl/ssl_lib.c
2  *  \brief Version independent SSL functions.
3  */
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5  * All rights reserved.
6  *
7  * This package is an SSL implementation written
8  * by Eric Young (eay@cryptsoft.com).
9  * The implementation was written so as to conform with Netscapes SSL.
10  * 
11  * This library is free for commercial and non-commercial use as long as
12  * the following conditions are aheared to.  The following conditions
13  * apply to all code found in this distribution, be it the RC4, RSA,
14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
15  * included with this distribution is covered by the same copyright terms
16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
17  * 
18  * Copyright remains Eric Young's, and as such any Copyright notices in
19  * the code are not to be removed.
20  * If this package is used in a product, Eric Young should be given attribution
21  * as the author of the parts of the library used.
22  * This can be in the form of a textual message at program startup or
23  * in documentation (online or textual) provided with the package.
24  * 
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
28  * 1. Redistributions of source code must retain the copyright
29  *    notice, this list of conditions and the following disclaimer.
30  * 2. Redistributions in binary form must reproduce the above copyright
31  *    notice, this list of conditions and the following disclaimer in the
32  *    documentation and/or other materials provided with the distribution.
33  * 3. All advertising materials mentioning features or use of this software
34  *    must display the following acknowledgement:
35  *    "This product includes cryptographic software written by
36  *     Eric Young (eay@cryptsoft.com)"
37  *    The word 'cryptographic' can be left out if the rouines from the library
38  *    being used are not cryptographic related :-).
39  * 4. If you include any Windows specific code (or a derivative thereof) from 
40  *    the apps directory (application code) you must include an acknowledgement:
41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
42  * 
43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53  * SUCH DAMAGE.
54  * 
55  * The licence and distribution terms for any publically available version or
56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
57  * copied and put under another distribution licence
58  * [including the GNU Public Licence.]
59  */
60
61 #include <stdio.h>
62 #include "objects.h"
63 #include "lhash.h"
64 #include "ssl_locl.h"
65
66 char *SSL_version_str=OPENSSL_VERSION_TEXT;
67
68 static STACK *ssl_meth=NULL;
69 static STACK *ssl_ctx_meth=NULL;
70 static int ssl_meth_num=0;
71 static int ssl_ctx_meth_num=0;
72
73 SSL3_ENC_METHOD ssl3_undef_enc_method={
74         ssl_undefined_function,
75         ssl_undefined_function,
76         ssl_undefined_function,
77         ssl_undefined_function,
78         ssl_undefined_function,
79         ssl_undefined_function,
80         };
81
82 int SSL_clear(SSL *s)
83         {
84         int state;
85
86         if (s->method == NULL)
87                 {
88                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
89                 return(0);
90                 }
91
92         s->error=0;
93         s->hit=0;
94         s->shutdown=0;
95
96 #if 0
97         /* This is set if we are doing dynamic renegotiation so keep
98          * the old cipher.  It is sort of a SSL_clear_lite :-) */
99         if (s->new_session) return(1);
100 #endif
101
102         state=s->state; /* Keep to check if we throw away the session-id */
103         s->type=0;
104
105         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
106
107         s->version=s->method->version;
108         s->client_version=s->version;
109         s->rwstate=SSL_NOTHING;
110         s->rstate=SSL_ST_READ_HEADER;
111         s->read_ahead=s->ctx->read_ahead;
112
113         if (s->init_buf != NULL)
114                 {
115                 BUF_MEM_free(s->init_buf);
116                 s->init_buf=NULL;
117                 }
118
119         ssl_clear_cipher_ctx(s);
120
121         if (ssl_clear_bad_session(s))
122                 {
123                 SSL_SESSION_free(s->session);
124                 s->session=NULL;
125                 }
126
127         s->first_packet=0;
128
129 #if 1
130         /* Check to see if we were changed into a different method, if
131          * so, revert back if we are not doing session-id reuse. */
132         if ((s->session == NULL) && (s->method != s->ctx->method))
133                 {
134                 s->method->ssl_free(s);
135                 s->method=s->ctx->method;
136                 if (!s->method->ssl_new(s))
137                         return(0);
138                 }
139         else
140 #endif
141                 s->method->ssl_clear(s);
142         return(1);
143         }
144
145 /** Used to change an SSL_CTXs default SSL method type */
146 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
147         {
148         STACK *sk;
149
150         ctx->method=meth;
151
152         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
153                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
154         if ((sk == NULL) || (sk_num(sk) <= 0))
155                 {
156                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
157                 return(0);
158                 }
159         return(1);
160         }
161
162 SSL *SSL_new(SSL_CTX *ctx)
163         {
164         SSL *s;
165
166         if (ctx == NULL)
167                 {
168                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
169                 return(NULL);
170                 }
171         if (ctx->method == NULL)
172                 {
173                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
174                 return(NULL);
175                 }
176
177         s=(SSL *)Malloc(sizeof(SSL));
178         if (s == NULL) goto err;
179         memset(s,0,sizeof(SSL));
180
181         if (ctx->default_cert != NULL)
182                 {
183                 CRYPTO_add(&ctx->default_cert->references,1,
184                            CRYPTO_LOCK_SSL_CERT);
185                 s->cert=ctx->default_cert;
186                 }
187         else
188                 s->cert=NULL;
189         s->verify_mode=ctx->verify_mode;
190         s->verify_callback=ctx->default_verify_callback;
191         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
192         s->ctx=ctx;
193
194         s->verify_result=X509_V_OK;
195
196         s->method=ctx->method;
197
198         if (!s->method->ssl_new(s))
199                 {
200                 SSL_CTX_free(ctx);
201                 Free(s);
202                 goto err;
203                 }
204
205         s->quiet_shutdown=ctx->quiet_shutdown;
206         s->references=1;
207         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
208         s->options=ctx->options;
209         SSL_clear(s);
210
211         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
212
213         return(s);
214 err:
215         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
216         return(NULL);
217         }
218
219 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
220                                unsigned int sid_ctx_len)
221     {
222     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
223         {
224         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
225         return 0;
226         }
227     ssl->sid_ctx_length=sid_ctx_len;
228     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
229
230     return 1;
231     }
232
233 void SSL_free(SSL *s)
234         {
235         int i;
236
237         if(s == NULL)
238             return;
239
240         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
241 #ifdef REF_PRINT
242         REF_PRINT("SSL",s);
243 #endif
244         if (i > 0) return;
245 #ifdef REF_CHECK
246         if (i < 0)
247                 {
248                 fprintf(stderr,"SSL_free, bad reference count\n");
249                 abort(); /* ok */
250                 }
251 #endif
252
253         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
254
255         if (s->bbio != NULL)
256                 {
257                 /* If the buffering BIO is in place, pop it off */
258                 if (s->bbio == s->wbio)
259                         {
260                         s->wbio=BIO_pop(s->wbio);
261                         }
262                 BIO_free(s->bbio);
263                 s->bbio=NULL;
264                 }
265         if (s->rbio != NULL)
266                 BIO_free_all(s->rbio);
267         if ((s->wbio != NULL) && (s->wbio != s->rbio))
268                 BIO_free_all(s->wbio);
269
270         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
271
272         /* add extra stuff */
273         if (s->cipher_list != NULL) sk_free(s->cipher_list);
274         if (s->cipher_list_by_id != NULL) sk_free(s->cipher_list_by_id);
275
276         /* Make the next call work :-) */
277         if (s->session != NULL)
278                 {
279                 ssl_clear_bad_session(s);
280                 SSL_SESSION_free(s->session);
281                 }
282
283         ssl_clear_cipher_ctx(s);
284
285         if (s->cert != NULL) ssl_cert_free(s->cert);
286         /* Free up if allocated */
287
288         if (s->ctx) SSL_CTX_free(s->ctx);
289
290         if (s->client_CA != NULL)
291                 sk_pop_free(s->client_CA,X509_NAME_free);
292
293         if (s->method != NULL) s->method->ssl_free(s);
294
295         Free((char *)s);
296         }
297
298 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
299         {
300         /* If the output buffering BIO is still in place, remove it
301          */
302         if (s->bbio != NULL)
303                 {
304                 if (s->wbio == s->bbio)
305                         {
306                         s->wbio=s->wbio->next_bio;
307                         s->bbio->next_bio=NULL;
308                         }
309                 }
310         if ((s->rbio != NULL) && (s->rbio != rbio))
311                 BIO_free_all(s->rbio);
312         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
313                 BIO_free_all(s->wbio);
314         s->rbio=rbio;
315         s->wbio=wbio;
316         }
317
318 BIO *SSL_get_rbio(SSL *s)
319         { return(s->rbio); }
320
321 BIO *SSL_get_wbio(SSL *s)
322         { return(s->wbio); }
323
324 int SSL_get_fd(SSL *s)
325         {
326         int ret= -1;
327         BIO *b,*r;
328
329         b=SSL_get_rbio(s);
330         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
331         if (r != NULL)
332                 BIO_get_fd(r,&ret);
333         return(ret);
334         }
335
336 #ifndef NO_SOCK
337 int SSL_set_fd(SSL *s,int fd)
338         {
339         int ret=0;
340         BIO *bio=NULL;
341
342         bio=BIO_new(BIO_s_socket());
343
344         if (bio == NULL)
345                 {
346                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
347                 goto err;
348                 }
349         BIO_set_fd(bio,fd,BIO_NOCLOSE);
350         SSL_set_bio(s,bio,bio);
351         ret=1;
352 err:
353         return(ret);
354         }
355
356 int SSL_set_wfd(SSL *s,int fd)
357         {
358         int ret=0;
359         BIO *bio=NULL;
360
361         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
362                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
363                 {
364                 bio=BIO_new(BIO_s_socket());
365
366                 if (bio == NULL)
367                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
368                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
369                 SSL_set_bio(s,SSL_get_rbio(s),bio);
370                 }
371         else
372                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
373         ret=1;
374 err:
375         return(ret);
376         }
377
378 int SSL_set_rfd(SSL *s,int fd)
379         {
380         int ret=0;
381         BIO *bio=NULL;
382
383         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
384                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
385                 {
386                 bio=BIO_new(BIO_s_socket());
387
388                 if (bio == NULL)
389                         {
390                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
391                         goto err;
392                         }
393                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
394                 SSL_set_bio(s,bio,SSL_get_wbio(s));
395                 }
396         else
397                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
398         ret=1;
399 err:
400         return(ret);
401         }
402 #endif
403
404 int SSL_get_verify_mode(SSL *s)
405         {
406         return(s->verify_mode);
407         }
408
409 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
410         {
411         return(s->verify_callback);
412         }
413
414 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
415         {
416         return(ctx->verify_mode);
417         }
418
419 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
420         {
421         return(ctx->default_verify_callback);
422         }
423
424 void SSL_set_verify(SSL *s,int mode,
425                     int (*callback)(int ok,X509_STORE_CTX *ctx))
426         {
427         s->verify_mode=mode;
428         if (callback != NULL)
429                 s->verify_callback=callback;
430         }
431
432 void SSL_set_read_ahead(SSL *s,int yes)
433         {
434         s->read_ahead=yes;
435         }
436
437 int SSL_get_read_ahead(SSL *s)
438         {
439         return(s->read_ahead);
440         }
441
442 int SSL_pending(SSL *s)
443         {
444         return(s->method->ssl_pending(s));
445         }
446
447 X509 *SSL_get_peer_certificate(SSL *s)
448         {
449         X509 *r;
450         
451         if ((s == NULL) || (s->session == NULL))
452                 r=NULL;
453         else
454                 r=s->session->peer;
455
456         if (r == NULL) return(r);
457
458         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
459
460         return(r);
461         }
462
463 STACK *SSL_get_peer_cert_chain(SSL *s)
464         {
465         STACK *r;
466         
467         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
468                 r=NULL;
469         else
470                 r=s->session->cert->cert_chain;
471
472         return(r);
473         }
474
475 /* Now in theory, since the calling process own 't' it should be safe to
476  * modify.  We need to be able to read f without being hassled */
477 void SSL_copy_session_id(SSL *t,SSL *f)
478         {
479         CERT *tmp;
480
481         /* Do we need to to SSL locking? */
482         SSL_set_session(t,SSL_get_session(f));
483
484         /* what if we are setup as SSLv2 but want to talk SSLv3 or
485          * vice-versa */
486         if (t->method != f->method)
487                 {
488                 t->method->ssl_free(t); /* cleanup current */
489                 t->method=f->method;    /* change method */
490                 t->method->ssl_new(t);  /* setup new */
491                 }
492
493         tmp=t->cert;
494         if (f->cert != NULL)
495                 {
496                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
497                 t->cert=f->cert;
498                 }
499         else
500                 t->cert=NULL;
501         if (tmp != NULL) ssl_cert_free(tmp);
502         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
503         }
504
505 /* Fix this so it checks all the valid key/cert options */
506 int SSL_CTX_check_private_key(SSL_CTX *ctx)
507         {
508         if (    (ctx == NULL) ||
509                 (ctx->default_cert == NULL) ||
510                 (ctx->default_cert->key->x509 == NULL))
511                 {
512                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
513                 return(0);
514                 }
515         if      (ctx->default_cert->key->privatekey == NULL)
516                 {
517                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
518                 return(0);
519                 }
520         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
521         }
522
523 /* Fix this function so that it takes an optional type parameter */
524 int SSL_check_private_key(SSL *ssl)
525         {
526         if (ssl == NULL)
527                 {
528                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
529                 return(0);
530                 }
531         if (ssl->cert == NULL)
532                 return(SSL_CTX_check_private_key(ssl->ctx));
533         if (ssl->cert->key->x509 == NULL)
534                 {
535                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
536                 return(0);
537                 }
538         if (ssl->cert->key->privatekey == NULL)
539                 {
540                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
541                 return(0);
542                 }
543         return(X509_check_private_key(ssl->cert->key->x509,
544                 ssl->cert->key->privatekey));
545         }
546
547 int SSL_accept(SSL *s)
548         {
549         return(s->method->ssl_accept(s));
550         }
551
552 int SSL_connect(SSL *s)
553         {
554         return(s->method->ssl_connect(s));
555         }
556
557 long SSL_get_default_timeout(SSL *s)
558         {
559         return(s->method->get_timeout());
560         }
561
562 int SSL_read(SSL *s,char *buf,int num)
563         {
564         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
565                 {
566                 s->rwstate=SSL_NOTHING;
567                 return(0);
568                 }
569         return(s->method->ssl_read(s,buf,num));
570         }
571
572 int SSL_peek(SSL *s,char *buf,int num)
573         {
574         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
575                 {
576                 return(0);
577                 }
578         return(s->method->ssl_peek(s,buf,num));
579         }
580
581 int SSL_write(SSL *s,const char *buf,int num)
582         {
583         if (s->shutdown & SSL_SENT_SHUTDOWN)
584                 {
585                 s->rwstate=SSL_NOTHING;
586                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
587                 return(-1);
588                 }
589         return(s->method->ssl_write(s,buf,num));
590         }
591
592 int SSL_shutdown(SSL *s)
593         {
594         if ((s != NULL) && !SSL_in_init(s))
595                 return(s->method->ssl_shutdown(s));
596         else
597                 return(1);
598         }
599
600 int SSL_renegotiate(SSL *s)
601         {
602         s->new_session=1;
603         return(s->method->ssl_renegotiate(s));
604         }
605
606 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
607         {
608         long l;
609
610         switch (cmd)
611                 {
612         case SSL_CTRL_GET_READ_AHEAD:
613                 return(s->read_ahead);
614         case SSL_CTRL_SET_READ_AHEAD:
615                 l=s->read_ahead;
616                 s->read_ahead=larg;
617                 return(l);
618         case SSL_CTRL_OPTIONS:
619                 return(s->options|=larg);
620         default:
621                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
622                 }
623         return(0);
624         }
625
626 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
627         {
628         long l;
629
630         switch (cmd)
631                 {
632         case SSL_CTRL_GET_READ_AHEAD:
633                 return(ctx->read_ahead);
634         case SSL_CTRL_SET_READ_AHEAD:
635                 l=ctx->read_ahead;
636                 ctx->read_ahead=larg;
637                 return(l);
638
639         case SSL_CTRL_SET_SESS_CACHE_SIZE:
640                 l=ctx->session_cache_size;
641                 ctx->session_cache_size=larg;
642                 return(l);
643         case SSL_CTRL_GET_SESS_CACHE_SIZE:
644                 return(ctx->session_cache_size);
645         case SSL_CTRL_SET_SESS_CACHE_MODE:
646                 l=ctx->session_cache_mode;
647                 ctx->session_cache_mode=larg;
648                 return(l);
649         case SSL_CTRL_GET_SESS_CACHE_MODE:
650                 return(ctx->session_cache_mode);
651
652         case SSL_CTRL_SESS_NUMBER:
653                 return(ctx->sessions->num_items);
654         case SSL_CTRL_SESS_CONNECT:
655                 return(ctx->stats.sess_connect);
656         case SSL_CTRL_SESS_CONNECT_GOOD:
657                 return(ctx->stats.sess_connect_good);
658         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
659                 return(ctx->stats.sess_connect_renegotiate);
660         case SSL_CTRL_SESS_ACCEPT:
661                 return(ctx->stats.sess_accept);
662         case SSL_CTRL_SESS_ACCEPT_GOOD:
663                 return(ctx->stats.sess_accept_good);
664         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
665                 return(ctx->stats.sess_accept_renegotiate);
666         case SSL_CTRL_SESS_HIT:
667                 return(ctx->stats.sess_hit);
668         case SSL_CTRL_SESS_CB_HIT:
669                 return(ctx->stats.sess_cb_hit);
670         case SSL_CTRL_SESS_MISSES:
671                 return(ctx->stats.sess_miss);
672         case SSL_CTRL_SESS_TIMEOUTS:
673                 return(ctx->stats.sess_timeout);
674         case SSL_CTRL_SESS_CACHE_FULL:
675                 return(ctx->stats.sess_cache_full);
676         case SSL_CTRL_OPTIONS:
677                 return(ctx->options|=larg);
678         default:
679                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
680                 }
681         return(0);
682         }
683
684 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
685         {
686         long l;
687
688         l=a->id-b->id;
689         if (l == 0L)
690                 return(0);
691         else
692                 return((l > 0)?1:-1);
693         }
694
695 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
696         {
697         long l;
698
699         l=(*ap)->id-(*bp)->id;
700         if (l == 0L)
701                 return(0);
702         else
703                 return((l > 0)?1:-1);
704         }
705
706 /** return a STACK of the ciphers available for the SSL and in order of
707  * preference */
708 STACK *SSL_get_ciphers(SSL *s)
709         {
710         if ((s != NULL) && (s->cipher_list != NULL))
711                 {
712                 return(s->cipher_list);
713                 }
714         else if ((s->ctx != NULL) &&
715                 (s->ctx->cipher_list != NULL))
716                 {
717                 return(s->ctx->cipher_list);
718                 }
719         return(NULL);
720         }
721
722 /** return a STACK of the ciphers available for the SSL and in order of
723  * algorithm id */
724 STACK *ssl_get_ciphers_by_id(SSL *s)
725         {
726         if ((s != NULL) && (s->cipher_list_by_id != NULL))
727                 {
728                 return(s->cipher_list_by_id);
729                 }
730         else if ((s != NULL) && (s->ctx != NULL) &&
731                 (s->ctx->cipher_list_by_id != NULL))
732                 {
733                 return(s->ctx->cipher_list_by_id);
734                 }
735         return(NULL);
736         }
737
738 /** The old interface to get the same thing as SSL_get_ciphers() */
739 char *SSL_get_cipher_list(SSL *s,int n)
740         {
741         SSL_CIPHER *c;
742         STACK *sk;
743
744         if (s == NULL) return(NULL);
745         sk=SSL_get_ciphers(s);
746         if ((sk == NULL) || (sk_num(sk) <= n))
747                 return(NULL);
748         c=(SSL_CIPHER *)sk_value(sk,n);
749         if (c == NULL) return(NULL);
750         return(c->name);
751         }
752
753 /** specify the ciphers to be used by defaut by the SSL_CTX */
754 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
755         {
756         STACK *sk;
757         
758         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
759                 &ctx->cipher_list_by_id,str);
760 /* XXXX */
761         return((sk == NULL)?0:1);
762         }
763
764 /** specify the ciphers to be used by the SSL */
765 int SSL_set_cipher_list(SSL *s,char *str)
766         {
767         STACK *sk;
768         
769         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
770                 &s->cipher_list_by_id,str);
771 /* XXXX */
772         return((sk == NULL)?0:1);
773         }
774
775 /* works well for SSLv2, not so good for SSLv3 */
776 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
777         {
778         char *p,*cp;
779         STACK *sk;
780         SSL_CIPHER *c;
781         int i;
782
783         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
784                 (len < 2))
785                 return(NULL);
786
787         p=buf;
788         sk=s->session->ciphers;
789         for (i=0; i<sk_num(sk); i++)
790                 {
791                 /* Decrement for either the ':' or a '\0' */
792                 len--;
793                 c=(SSL_CIPHER *)sk_value(sk,i);
794                 for (cp=c->name; *cp; )
795                         {
796                         if (len-- == 0)
797                                 {
798                                 *p='\0';
799                                 return(buf);
800                                 }
801                         else
802                                 *(p++)= *(cp++);
803                         }
804                 *(p++)=':';
805                 }
806         p[-1]='\0';
807         return(buf);
808         }
809
810 int ssl_cipher_list_to_bytes(SSL *s,STACK *sk,unsigned char *p)
811         {
812         int i,j=0;
813         SSL_CIPHER *c;
814         unsigned char *q;
815
816         if (sk == NULL) return(0);
817         q=p;
818
819         for (i=0; i<sk_num(sk); i++)
820                 {
821                 c=(SSL_CIPHER *)sk_value(sk,i);
822                 j=ssl_put_cipher_by_char(s,c,p);
823                 p+=j;
824                 }
825         return(p-q);
826         }
827
828 STACK *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,STACK **skp)
829         {
830         SSL_CIPHER *c;
831         STACK *sk;
832         int i,n;
833
834         n=ssl_put_cipher_by_char(s,NULL,NULL);
835         if ((num%n) != 0)
836                 {
837                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
838                 return(NULL);
839                 }
840         if ((skp == NULL) || (*skp == NULL))
841                 sk=sk_new(NULL); /* change perhaps later */
842         else
843                 {
844                 sk= *skp;
845                 sk_zero(sk);
846                 }
847
848         for (i=0; i<num; i+=n)
849                 {
850                 c=ssl_get_cipher_by_char(s,p);
851                 p+=n;
852                 if (c != NULL)
853                         {
854                         if (!sk_push(sk,(char *)c))
855                                 {
856                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
857                                 goto err;
858                                 }
859                         }
860                 }
861
862         if (skp != NULL)
863                 *skp=sk;
864         return(sk);
865 err:
866         if ((skp == NULL) || (*skp == NULL))
867                 sk_free(sk);
868         return(NULL);
869         }
870
871 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
872         {
873         unsigned long l;
874
875         l=(unsigned long)
876                 ((unsigned int) a->session_id[0]     )|
877                 ((unsigned int) a->session_id[1]<< 8L)|
878                 ((unsigned long)a->session_id[2]<<16L)|
879                 ((unsigned long)a->session_id[3]<<24L);
880         return(l);
881         }
882
883 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
884         {
885         if (a->ssl_version != b->ssl_version)
886                 return(1);
887         if (a->session_id_length != b->session_id_length)
888                 return(1);
889         return(memcmp(a->session_id,b->session_id,a->session_id_length));
890         }
891
892 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
893         {
894         SSL_CTX *ret=NULL;
895         
896         if (meth == NULL)
897                 {
898                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
899                 return(NULL);
900                 }
901
902         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
903                 {
904                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
905                 goto err;
906                 }
907         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
908         if (ret == NULL)
909                 goto err;
910
911         memset(ret,0,sizeof(SSL_CTX));
912
913         ret->method=meth;
914
915         ret->cert_store=NULL;
916         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
917         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
918         ret->session_cache_head=NULL;
919         ret->session_cache_tail=NULL;
920
921         /* We take the system default */
922         ret->session_timeout=meth->get_timeout();
923
924         ret->new_session_cb=NULL;
925         ret->remove_session_cb=NULL;
926         ret->get_session_cb=NULL;
927
928         memset((char *)&ret->stats,0,sizeof(ret->stats));
929
930         ret->references=1;
931         ret->quiet_shutdown=0;
932
933 /*      ret->cipher=NULL;*/
934 /*      ret->s2->challenge=NULL;
935         ret->master_key=NULL;
936         ret->key_arg=NULL;
937         ret->s2->conn_id=NULL; */
938
939         ret->info_callback=NULL;
940
941         ret->app_verify_callback=NULL;
942         ret->app_verify_arg=NULL;
943
944         ret->read_ahead=0;
945         ret->verify_mode=SSL_VERIFY_NONE;
946         ret->default_verify_callback=NULL;
947         if ((ret->default_cert=ssl_cert_new()) == NULL)
948                 goto err;
949
950         ret->default_passwd_callback=NULL;
951         ret->client_cert_cb=NULL;
952
953         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
954         if (ret->sessions == NULL) goto err;
955         ret->cert_store=X509_STORE_new();
956         if (ret->cert_store == NULL) goto err;
957
958         ssl_create_cipher_list(ret->method,
959                 &ret->cipher_list,&ret->cipher_list_by_id,
960                 SSL_DEFAULT_CIPHER_LIST);
961         if ((ret->cipher_list == NULL) || (sk_num(ret->cipher_list) <= 0))
962                 {
963                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
964                 goto err2;
965                 }
966
967         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
968                 {
969                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
970                 goto err2;
971                 }
972         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
973                 {
974                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
975                 goto err2;
976                 }
977         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
978                 {
979                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
980                 goto err2;
981                 }
982
983         if ((ret->client_CA=sk_new_null()) == NULL)
984                 goto err;
985
986         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
987
988         ret->extra_certs=NULL;
989         ret->comp_methods=SSL_COMP_get_compression_methods();
990
991         return(ret);
992 err:
993         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
994 err2:
995         if (ret != NULL) SSL_CTX_free(ret);
996         return(NULL);
997         }
998
999 void SSL_CTX_free(SSL_CTX *a)
1000         {
1001         int i;
1002
1003         if (a == NULL) return;
1004
1005         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1006 #ifdef REF_PRINT
1007         REF_PRINT("SSL_CTX",a);
1008 #endif
1009         if (i > 0) return;
1010 #ifdef REF_CHECK
1011         if (i < 0)
1012                 {
1013                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1014                 abort(); /* ok */
1015                 }
1016 #endif
1017         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1018
1019         if (a->sessions != NULL)
1020                 {
1021                 SSL_CTX_flush_sessions(a,0);
1022                 lh_free(a->sessions);
1023                 }
1024         if (a->cert_store != NULL)
1025                 X509_STORE_free(a->cert_store);
1026         if (a->cipher_list != NULL)
1027                 sk_free(a->cipher_list);
1028         if (a->cipher_list_by_id != NULL)
1029                 sk_free(a->cipher_list_by_id);
1030         if (a->default_cert != NULL)
1031                 ssl_cert_free(a->default_cert);
1032         if (a->client_CA != NULL)
1033                 sk_pop_free(a->client_CA,X509_NAME_free);
1034         if (a->extra_certs != NULL)
1035                 sk_pop_free(a->extra_certs,X509_free);
1036         if (a->comp_methods != NULL)
1037                 sk_pop_free(a->comp_methods,FreeFunc);
1038         Free((char *)a);
1039         }
1040
1041 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1042         {
1043         ctx->default_passwd_callback=cb;
1044         }
1045
1046 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1047         {
1048         ctx->app_verify_callback=cb;
1049         ctx->app_verify_arg=arg;
1050         }
1051
1052 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1053         {
1054         ctx->verify_mode=mode;
1055         ctx->default_verify_callback=cb;
1056         /* This needs cleaning up EAY EAY EAY */
1057         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1058         }
1059
1060 /* Need default_cert to check for callbacks, for now (see comment in CERT
1061    strucure)
1062 */
1063 void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
1064         {
1065         CERT_PKEY *cpk;
1066         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1067         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1068         int rsa_tmp_export,dh_tmp_export,kl;
1069         unsigned long mask,emask;
1070
1071         if (c == NULL) return;
1072
1073         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1074
1075 #ifndef NO_RSA
1076         rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
1077         rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
1078                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1079 #else
1080         rsa_tmp=rsa_tmp_export=0;
1081 #endif
1082 #ifndef NO_DH
1083         dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
1084         dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
1085                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1086 #else
1087         dh_tmp=dh_tmp_export=0;
1088 #endif
1089
1090         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1091         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1092         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1093         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1094         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1095         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1096         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1097         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1098         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1099         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1100         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1101 /* FIX THIS EAY EAY EAY */
1102         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1103         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1104
1105         mask=0;
1106         emask=0;
1107
1108 #ifdef CIPHER_DEBUG
1109         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1110                 rsa_tmp,rsa_tmp_export,dh_tmp,
1111                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1112 #endif
1113
1114         if (rsa_enc || (rsa_tmp && rsa_sign))
1115                 mask|=SSL_kRSA;
1116         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1117                 emask|=SSL_kRSA;
1118
1119 #if 0
1120         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1121         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1122                 (rsa_enc || rsa_sign || dsa_sign))
1123                 mask|=SSL_kEDH;
1124         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1125                 (rsa_enc || rsa_sign || dsa_sign))
1126                 emask|=SSL_kEDH;
1127 #endif
1128
1129         if (dh_tmp_export) 
1130                 emask|=SSL_kEDH;
1131
1132         if (dh_tmp)
1133                 mask|=SSL_kEDH;
1134
1135         if (dh_rsa) mask|=SSL_kDHr;
1136         if (dh_rsa_export) emask|=SSL_kDHr;
1137
1138         if (dh_dsa) mask|=SSL_kDHd;
1139         if (dh_dsa_export) emask|=SSL_kDHd;
1140
1141         if (rsa_enc || rsa_sign)
1142                 {
1143                 mask|=SSL_aRSA;
1144                 emask|=SSL_aRSA;
1145                 }
1146
1147         if (dsa_sign)
1148                 {
1149                 mask|=SSL_aDSS;
1150                 emask|=SSL_aDSS;
1151                 }
1152
1153 #ifdef SSL_ALLOW_ADH
1154         mask|=SSL_aNULL;
1155         emask|=SSL_aNULL;
1156 #endif
1157
1158         c->mask=mask;
1159         c->export_mask=emask;
1160         c->valid=1;
1161         }
1162
1163 /* THIS NEEDS CLEANING UP */
1164 X509 *ssl_get_server_send_cert(SSL *s)
1165         {
1166         unsigned long alg,mask,kalg;
1167         CERT *c;
1168         int i,export;
1169
1170         c=s->cert;
1171         ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
1172         alg=s->s3->tmp.new_cipher->algorithms;
1173         export=SSL_IS_EXPORT(alg);
1174         mask=export?c->export_mask:c->mask;
1175         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1176
1177         if      (kalg & SSL_kDHr)
1178                 i=SSL_PKEY_DH_RSA;
1179         else if (kalg & SSL_kDHd)
1180                 i=SSL_PKEY_DH_DSA;
1181         else if (kalg & SSL_aDSS)
1182                 i=SSL_PKEY_DSA_SIGN;
1183         else if (kalg & SSL_aRSA)
1184                 {
1185                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1186                         i=SSL_PKEY_RSA_SIGN;
1187                 else
1188                         i=SSL_PKEY_RSA_ENC;
1189                 }
1190         else /* if (kalg & SSL_aNULL) */
1191                 {
1192                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1193                 return(NULL);
1194                 }
1195         if (c->pkeys[i].x509 == NULL) return(NULL);
1196         return(c->pkeys[i].x509);
1197         }
1198
1199 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1200         {
1201         unsigned long alg;
1202         CERT *c;
1203
1204         alg=cipher->algorithms;
1205         c=s->cert;
1206
1207         if ((alg & SSL_aDSS) &&
1208                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1209                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1210         else if (alg & SSL_aRSA)
1211                 {
1212                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1213                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1214                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1215                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1216                 else
1217                         return(NULL);
1218                 }
1219         else /* if (alg & SSL_aNULL) */
1220                 {
1221                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1222                 return(NULL);
1223                 }
1224         }
1225
1226 void ssl_update_cache(SSL *s,int mode)
1227         {
1228         int i;
1229
1230         /* If the session_id_length is 0, we are not supposed to cache it,
1231          * and it would be rather hard to do anyway :-) */
1232         if (s->session->session_id_length == 0) return;
1233
1234         if ((s->ctx->session_cache_mode & mode)
1235                 && (!s->hit)
1236                 && SSL_CTX_add_session(s->ctx,s->session)
1237                 && (s->ctx->new_session_cb != NULL))
1238                 {
1239                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1240                 if (!s->ctx->new_session_cb(s,s->session))
1241                         SSL_SESSION_free(s->session);
1242                 }
1243
1244         /* auto flush every 255 connections */
1245         i=s->ctx->session_cache_mode;
1246         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1247                 ((i & mode) == mode))
1248                 {
1249                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1250                         ?s->ctx->stats.sess_connect_good
1251                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1252                         {
1253                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1254                         }
1255                 }
1256         }
1257
1258 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1259         {
1260         return(s->method);
1261         }
1262
1263 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1264         {
1265         int conn= -1;
1266         int ret=1;
1267
1268         if (s->method != meth)
1269                 {
1270                 if (s->handshake_func != NULL)
1271                         conn=(s->handshake_func == s->method->ssl_connect);
1272
1273                 if (s->method->version == meth->version)
1274                         s->method=meth;
1275                 else
1276                         {
1277                         s->method->ssl_free(s);
1278                         s->method=meth;
1279                         ret=s->method->ssl_new(s);
1280                         }
1281
1282                 if (conn == 1)
1283                         s->handshake_func=meth->ssl_connect;
1284                 else if (conn == 0)
1285                         s->handshake_func=meth->ssl_accept;
1286                 }
1287         return(ret);
1288         }
1289
1290 int SSL_get_error(SSL *s,int i)
1291         {
1292         int reason;
1293         unsigned long l;
1294         BIO *bio;
1295
1296         if (i > 0) return(SSL_ERROR_NONE);
1297
1298         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1299          * etc, where we do encode the error */
1300         if ((l=ERR_peek_error()) != 0)
1301                 {
1302                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1303                         return(SSL_ERROR_SYSCALL);
1304                 else
1305                         return(SSL_ERROR_SSL);
1306                 }
1307
1308         if ((i < 0) && SSL_want_read(s))
1309                 {
1310                 bio=SSL_get_rbio(s);
1311                 if (BIO_should_read(bio))
1312                         return(SSL_ERROR_WANT_READ);
1313                 else if (BIO_should_write(bio))
1314                         return(SSL_ERROR_WANT_WRITE);
1315                 else if (BIO_should_io_special(bio))
1316                         {
1317                         reason=BIO_get_retry_reason(bio);
1318                         if (reason == BIO_RR_CONNECT)
1319                                 return(SSL_ERROR_WANT_CONNECT);
1320                         else
1321                                 return(SSL_ERROR_SYSCALL); /* unknown */
1322                         }
1323                 }
1324
1325         if ((i < 0) && SSL_want_write(s))
1326                 {
1327                 bio=SSL_get_wbio(s);
1328                 if (BIO_should_write(bio))
1329                         return(SSL_ERROR_WANT_WRITE);
1330                 else if (BIO_should_read(bio))
1331                         return(SSL_ERROR_WANT_READ);
1332                 else if (BIO_should_io_special(bio))
1333                         {
1334                         reason=BIO_get_retry_reason(bio);
1335                         if (reason == BIO_RR_CONNECT)
1336                                 return(SSL_ERROR_WANT_CONNECT);
1337                         else
1338                                 return(SSL_ERROR_SYSCALL);
1339                         }
1340                 }
1341         if ((i < 0) && SSL_want_x509_lookup(s))
1342                 {
1343                 return(SSL_ERROR_WANT_X509_LOOKUP);
1344                 }
1345
1346         if (i == 0)
1347                 {
1348                 if (s->version == SSL2_VERSION)
1349                         {
1350                         /* assume it is the socket being closed */
1351                         return(SSL_ERROR_ZERO_RETURN);
1352                         }
1353                 else
1354                         {
1355                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1356                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1357                                 return(SSL_ERROR_ZERO_RETURN);
1358                         }
1359                 }
1360         return(SSL_ERROR_SYSCALL);
1361         }
1362
1363 int SSL_do_handshake(SSL *s)
1364         {
1365         int ret=1;
1366
1367         if (s->handshake_func == NULL)
1368                 {
1369                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1370                 return(-1);
1371                 }
1372
1373         s->method->ssl_renegotiate_check(s);
1374
1375         if (SSL_in_init(s) || SSL_in_before(s))
1376                 {
1377                 ret=s->handshake_func(s);
1378                 }
1379         return(ret);
1380         }
1381
1382 /* For the next 2 functions, SSL_clear() sets shutdown and so
1383  * one of these calls will reset it */
1384 void SSL_set_accept_state(SSL *s)
1385         {
1386         s->server=1;
1387         s->shutdown=0;
1388         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1389         s->handshake_func=s->method->ssl_accept;
1390         /* clear the current cipher */
1391         ssl_clear_cipher_ctx(s);
1392         }
1393
1394 void SSL_set_connect_state(SSL *s)
1395         {
1396         s->server=0;
1397         s->shutdown=0;
1398         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1399         s->handshake_func=s->method->ssl_connect;
1400         /* clear the current cipher */
1401         ssl_clear_cipher_ctx(s);
1402         }
1403
1404 int ssl_undefined_function(SSL *s)
1405         {
1406         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1407         return(0);
1408         }
1409
1410 SSL_METHOD *ssl_bad_method(int ver)
1411         {
1412         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1413         return(NULL);
1414         }
1415
1416 char *SSL_get_version(SSL *s)
1417         {
1418         if (s->version == TLS1_VERSION)
1419                 return("TLSv1");
1420         else if (s->version == SSL3_VERSION)
1421                 return("SSLv3");
1422         else if (s->version == SSL2_VERSION)
1423                 return("SSLv2");
1424         else
1425                 return("unknown");
1426         }
1427
1428 SSL *SSL_dup(SSL *s)
1429         {
1430         STACK *sk;
1431         X509_NAME *xn;
1432         SSL *ret;
1433         int i;
1434                  
1435         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1436             return(NULL);
1437                           
1438         /* This copies version, session-id, SSL_METHOD and 'cert' */
1439         SSL_copy_session_id(ret,s);
1440
1441         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1442         SSL_set_verify(ret,SSL_get_verify_mode(s),
1443                 SSL_get_verify_callback(s));
1444
1445         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1446         
1447         ret->debug=s->debug;
1448         ret->options=s->options;
1449
1450         /* copy app data, a little dangerous perhaps */
1451         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1452                 goto err;
1453
1454         /* setup rbio, and wbio */
1455         if (s->rbio != NULL)
1456                 {
1457                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1458                         goto err;
1459                 }
1460         if (s->wbio != NULL)
1461                 {
1462                 if (s->wbio != s->rbio)
1463                         {
1464                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1465                                 goto err;
1466                         }
1467                 else
1468                         ret->wbio=ret->rbio;
1469                 }
1470
1471         /* dup the cipher_list and cipher_list_by_id stacks */
1472         if (s->cipher_list != NULL)
1473                 {
1474                 if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
1475                         goto err;
1476                 }
1477         if (s->cipher_list_by_id != NULL)
1478                 if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
1479                         == NULL)
1480                         goto err;
1481
1482         /* Dup the client_CA list */
1483         if (s->client_CA != NULL)
1484                 {
1485                 if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
1486                 ret->client_CA=sk;
1487                 for (i=0; i<sk_num(sk); i++)
1488                         {
1489                         xn=(X509_NAME *)sk_value(sk,i);
1490                         if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
1491                                 {
1492                                 X509_NAME_free(xn);
1493                                 goto err;
1494                                 }
1495                         }
1496                 }
1497
1498         ret->shutdown=s->shutdown;
1499         ret->state=s->state;
1500         ret->handshake_func=s->handshake_func;
1501         ret->server=s->server;
1502
1503         if (0)
1504                 {
1505 err:
1506                 if (ret != NULL) SSL_free(ret);
1507                 ret=NULL;
1508                 }
1509         return(ret);
1510         }
1511
1512 void ssl_clear_cipher_ctx(SSL *s)
1513         {
1514         if (s->enc_read_ctx != NULL)
1515                 {
1516                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1517                 Free(s->enc_read_ctx);
1518                 s->enc_read_ctx=NULL;
1519                 }
1520         if (s->enc_write_ctx != NULL)
1521                 {
1522                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1523                 Free(s->enc_write_ctx);
1524                 s->enc_write_ctx=NULL;
1525                 }
1526         if (s->expand != NULL)
1527                 {
1528                 COMP_CTX_free(s->expand);
1529                 s->expand=NULL;
1530                 }
1531         if (s->compress != NULL)
1532                 {
1533                 COMP_CTX_free(s->compress);
1534                 s->compress=NULL;
1535                 }
1536         }
1537
1538 /* Fix this function so that it takes an optional type parameter */
1539 X509 *SSL_get_certificate(SSL *s)
1540         {
1541         if (s->cert != NULL)
1542                 return(s->cert->key->x509);
1543         else
1544                 return(NULL);
1545         }
1546
1547 /* Fix this function so that it takes an optional type parameter */
1548 EVP_PKEY *SSL_get_privatekey(SSL *s)
1549         {
1550         if (s->cert != NULL)
1551                 return(s->cert->key->privatekey);
1552         else
1553                 return(NULL);
1554         }
1555
1556 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1557         {
1558         if ((s->session != NULL) && (s->session->cipher != NULL))
1559                 return(s->session->cipher);
1560         return(NULL);
1561         }
1562
1563 int ssl_init_wbio_buffer(SSL *s,int push)
1564         {
1565         BIO *bbio;
1566
1567         if (s->bbio == NULL)
1568                 {
1569                 bbio=BIO_new(BIO_f_buffer());
1570                 if (bbio == NULL) return(0);
1571                 s->bbio=bbio;
1572                 }
1573         else
1574                 {
1575                 bbio=s->bbio;
1576                 if (s->bbio == s->wbio)
1577                         s->wbio=BIO_pop(s->wbio);
1578                 }
1579         BIO_reset(bbio);
1580 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1581         if (!BIO_set_read_buffer_size(bbio,1))
1582                 {
1583                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1584                 return(0);
1585                 }
1586         if (push)
1587                 {
1588                 if (s->wbio != bbio)
1589                         s->wbio=BIO_push(bbio,s->wbio);
1590                 }
1591         else
1592                 {
1593                 if (s->wbio == bbio)
1594                         s->wbio=BIO_pop(bbio);
1595                 }
1596         return(1);
1597         }
1598
1599 void ssl_free_wbio_buffer(SSL *s)
1600         {
1601         BIO *under;
1602
1603         if (s->bbio == NULL) return;
1604
1605         if (s->bbio == s->wbio)
1606                 {
1607                 /* remove buffering */
1608                 under=BIO_pop(s->wbio);
1609                 if (under != NULL)
1610                         s->wbio=under;
1611                 else
1612                         abort(); /* ok */
1613                 }
1614         BIO_free(s->bbio);
1615         s->bbio=NULL;
1616         }
1617         
1618 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1619         {
1620         ctx->quiet_shutdown=mode;
1621         }
1622
1623 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1624         {
1625         return(ctx->quiet_shutdown);
1626         }
1627
1628 void SSL_set_quiet_shutdown(SSL *s,int mode)
1629         {
1630         s->quiet_shutdown=mode;
1631         }
1632
1633 int SSL_get_quiet_shutdown(SSL *s)
1634         {
1635         return(s->quiet_shutdown);
1636         }
1637
1638 void SSL_set_shutdown(SSL *s,int mode)
1639         {
1640         s->shutdown=mode;
1641         }
1642
1643 int SSL_get_shutdown(SSL *s)
1644         {
1645         return(s->shutdown);
1646         }
1647
1648 int SSL_version(SSL *s)
1649         {
1650         return(s->version);
1651         }
1652
1653 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1654         {
1655         return(ssl->ctx);
1656         }
1657
1658 #ifndef NO_STDIO
1659 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1660         {
1661         return(X509_STORE_set_default_paths(ctx->cert_store));
1662         }
1663
1664 int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
1665         {
1666         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1667         }
1668 #endif
1669
1670 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1671         {
1672         ssl->info_callback=cb;
1673         }
1674
1675 void (*SSL_get_info_callback(SSL *ssl))()
1676         {
1677         return((void (*)())ssl->info_callback);
1678         }
1679
1680 int SSL_state(SSL *ssl)
1681         {
1682         return(ssl->state);
1683         }
1684
1685 void SSL_set_verify_result(SSL *ssl,long arg)
1686         {
1687         ssl->verify_result=arg;
1688         }
1689
1690 long SSL_get_verify_result(SSL *ssl)
1691         {
1692         return(ssl->verify_result);
1693         }
1694
1695 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1696                          int (*dup_func)(),void (*free_func)())
1697         {
1698         ssl_meth_num++;
1699         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1700                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1701         }
1702
1703 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1704         {
1705         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1706         }
1707
1708 void *SSL_get_ex_data(SSL *s,int idx)
1709         {
1710         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1711         }
1712
1713 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1714                              int (*dup_func)(),void (*free_func)())
1715         {
1716         ssl_ctx_meth_num++;
1717         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1718                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1719         }
1720
1721 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1722         {
1723         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1724         }
1725
1726 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1727         {
1728         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1729         }
1730
1731 int ssl_ok(SSL *s)
1732         {
1733         return(1);
1734         }
1735
1736 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1737         {
1738         return(ctx->cert_store);
1739         }
1740
1741 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1742         {
1743         if (ctx->cert_store != NULL)
1744                 X509_STORE_free(ctx->cert_store);
1745         ctx->cert_store=store;
1746         }
1747
1748 int SSL_want(SSL *s)
1749         {
1750         return(s->rwstate);
1751         }
1752
1753 /*!
1754  * \brief Set the callback for generating temporary RSA keys.
1755  * \param ctx the SSL context.
1756  * \param cb the callback
1757  */
1758
1759 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1760                                                           int keylength))
1761     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1762
1763 #ifdef DOXYGEN
1764 /*!
1765  * \brief The RSA temporary key callback function.
1766  * \param ssl the SSL session.
1767  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1768  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1769  * the required key in bits.
1770  * \return the temporary RSA key.
1771  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1772  */
1773
1774 RSA *cb(SSL *ssl,int export,int keylength)
1775     {}
1776 #endif
1777
1778 /*!
1779  * \brief Set the callback for generating temporary DH keys.
1780  * \param ctx the SSL context.
1781  * \param dh the callback
1782  */
1783
1784 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1785                                                         int keylength))
1786     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1787
1788 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1789                                                           int keylength))
1790     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1791
1792 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1793                                                         int keylength))
1794     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1795
1796 #if defined(_WINDLL) && defined(WIN16)
1797 #include "../crypto/bio/bss_file.c"
1798 #endif