7864f2f7b00038c7e346c2cf738b45e2b9643217
[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
62 #include <assert.h>
63 #include <stdio.h>
64 #include <openssl/objects.h>
65 #include <openssl/lhash.h>
66 #include <openssl/x509v3.h>
67 #include "ssl_locl.h"
68
69 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
70
71 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *ssl_meth=NULL;
72 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *ssl_ctx_meth=NULL;
73 static int ssl_meth_num=0;
74 static int ssl_ctx_meth_num=0;
75
76 OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
77         /* evil casts, but these functions are only called if there's a library bug */
78         (int (*)(SSL *,int))ssl_undefined_function,
79         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
80         ssl_undefined_function,
81         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
82         (int (*)(SSL*, int))ssl_undefined_function,
83         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function
84         };
85
86 int SSL_clear(SSL *s)
87         {
88         int state;
89
90         if (s->method == NULL)
91                 {
92                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
93                 return(0);
94                 }
95
96         s->error=0;
97         s->hit=0;
98         s->shutdown=0;
99
100 #if 0 /* Disabled since version 1.10 of this file (early return not
101        * needed because SSL_clear is not called when doing renegotiation) */
102         /* This is set if we are doing dynamic renegotiation so keep
103          * the old cipher.  It is sort of a SSL_clear_lite :-) */
104         if (s->new_session) return(1);
105 #else
106         if (s->new_session)
107                 {
108                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_INTERNAL_ERROR);
109                 return 0;
110                 }
111 #endif
112
113         state=s->state; /* Keep to check if we throw away the session-id */
114         s->type=0;
115
116         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
117
118         s->version=s->method->version;
119         s->client_version=s->version;
120         s->rwstate=SSL_NOTHING;
121         s->rstate=SSL_ST_READ_HEADER;
122 #if 0
123         s->read_ahead=s->ctx->read_ahead;
124 #endif
125
126         if (s->init_buf != NULL)
127                 {
128                 BUF_MEM_free(s->init_buf);
129                 s->init_buf=NULL;
130                 }
131
132         ssl_clear_cipher_ctx(s);
133
134         if (ssl_clear_bad_session(s))
135                 {
136                 SSL_SESSION_free(s->session);
137                 s->session=NULL;
138                 }
139
140         s->first_packet=0;
141
142 #if 1
143         /* Check to see if we were changed into a different method, if
144          * so, revert back if we are not doing session-id reuse. */
145         if ((s->session == NULL) && (s->method != s->ctx->method))
146                 {
147                 s->method->ssl_free(s);
148                 s->method=s->ctx->method;
149                 if (!s->method->ssl_new(s))
150                         return(0);
151                 }
152         else
153 #endif
154                 s->method->ssl_clear(s);
155         return(1);
156         }
157
158 /** Used to change an SSL_CTXs default SSL method type */
159 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
160         {
161         STACK_OF(SSL_CIPHER) *sk;
162
163         ctx->method=meth;
164
165         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
166                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
167         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
168                 {
169                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
170                 return(0);
171                 }
172         return(1);
173         }
174
175 SSL *SSL_new(SSL_CTX *ctx)
176         {
177         SSL *s;
178
179         if (ctx == NULL)
180                 {
181                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
182                 return(NULL);
183                 }
184         if (ctx->method == NULL)
185                 {
186                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
187                 return(NULL);
188                 }
189
190         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
191         if (s == NULL) goto err;
192         memset(s,0,sizeof(SSL));
193
194 #ifndef OPENSSL_NO_KRB5
195         s->kssl_ctx = kssl_ctx_new();
196 #endif  /* OPENSSL_NO_KRB5 */
197
198         if (ctx->cert != NULL)
199                 {
200                 /* Earlier library versions used to copy the pointer to
201                  * the CERT, not its contents; only when setting new
202                  * parameters for the per-SSL copy, ssl_cert_new would be
203                  * called (and the direct reference to the per-SSL_CTX
204                  * settings would be lost, but those still were indirectly
205                  * accessed for various purposes, and for that reason they
206                  * used to be known as s->ctx->default_cert).
207                  * Now we don't look at the SSL_CTX's CERT after having
208                  * duplicated it once. */
209
210                 s->cert = ssl_cert_dup(ctx->cert);
211                 if (s->cert == NULL)
212                         goto err;
213                 }
214         else
215                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
216         s->sid_ctx_length=ctx->sid_ctx_length;
217         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
218         s->verify_mode=ctx->verify_mode;
219         s->verify_depth=ctx->verify_depth;
220         s->verify_callback=ctx->default_verify_callback;
221         s->generate_session_id=ctx->generate_session_id;
222         s->purpose = ctx->purpose;
223         s->trust = ctx->trust;
224         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
225         s->ctx=ctx;
226
227         s->verify_result=X509_V_OK;
228
229         s->method=ctx->method;
230
231         if (!s->method->ssl_new(s))
232                 goto err;
233
234         s->quiet_shutdown=ctx->quiet_shutdown;
235         s->references=1;
236         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
237         s->options=ctx->options;
238         s->mode=ctx->mode;
239         s->read_ahead=ctx->read_ahead; /* used to happen in SSL_clear */
240         SSL_clear(s);
241
242         CRYPTO_new_ex_data(ssl_meth,s,&s->ex_data);
243
244         return(s);
245 err:
246         if (s != NULL)
247                 {
248                 if (s->cert != NULL)
249                         ssl_cert_free(s->cert);
250                 if (s->ctx != NULL)
251                         SSL_CTX_free(s->ctx); /* decrement reference count */
252                 OPENSSL_free(s);
253                 }
254         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
255         return(NULL);
256         }
257
258 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
259                                    unsigned int sid_ctx_len)
260     {
261     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
262         {
263         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
264         return 0;
265         }
266     ctx->sid_ctx_length=sid_ctx_len;
267     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
268
269     return 1;
270     }
271
272 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
273                                unsigned int sid_ctx_len)
274     {
275     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
276         {
277         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
278         return 0;
279         }
280     ssl->sid_ctx_length=sid_ctx_len;
281     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
282
283     return 1;
284     }
285
286 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
287         {
288         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
289         ctx->generate_session_id = cb;
290         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
291         return 1;
292         }
293
294 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
295         {
296         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
297         ssl->generate_session_id = cb;
298         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
299         return 1;
300         }
301
302 int SSL_CTX_has_matching_session_id(const SSL_CTX *ctx, const unsigned char *id,
303                                 unsigned int id_len)
304         {
305         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
306          * we can "construct" a session to give us the desired check - ie. to
307          * find if there's a session in the hash table that would conflict with
308          * any new session built out of this id/id_len and the ssl_version in
309          * use by this SSL_CTX. */
310         SSL_SESSION r, *p;
311         r.ssl_version = ctx->method->version;
312         r.session_id_length = id_len;
313         memcpy(r.session_id, id, id_len);
314
315         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
316         p = (SSL_SESSION *)lh_retrieve(ctx->sessions, &r);
317         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
318         return (p != NULL);
319         }
320
321 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
322 {
323         if(X509_PURPOSE_get_by_id(purpose) == -1) {
324                 SSLerr(SSL_F_SSL_CTX_SET_PURPOSE, SSL_R_INVALID_PURPOSE);
325                 return 0;
326         }
327         s->purpose = purpose;
328         return 1;
329 }
330
331 int SSL_set_purpose(SSL *s, int purpose)
332 {
333         if(X509_PURPOSE_get_by_id(purpose) == -1) {
334                 SSLerr(SSL_F_SSL_SET_PURPOSE, SSL_R_INVALID_PURPOSE);
335                 return 0;
336         }
337         s->purpose = purpose;
338         return 1;
339 }
340         
341 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
342 {
343         if(X509_TRUST_get_by_id(trust) == -1) {
344                 SSLerr(SSL_F_SSL_CTX_SET_TRUST, SSL_R_INVALID_TRUST);
345                 return 0;
346         }
347         s->trust = trust;
348         return 1;
349 }
350
351 int SSL_set_trust(SSL *s, int trust)
352 {
353         if(X509_TRUST_get_by_id(trust) == -1) {
354                 SSLerr(SSL_F_SSL_SET_TRUST, SSL_R_INVALID_TRUST);
355                 return 0;
356         }
357         s->trust = trust;
358         return 1;
359 }
360
361 void SSL_free(SSL *s)
362         {
363         int i;
364
365         if(s == NULL)
366             return;
367
368         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
369 #ifdef REF_PRINT
370         REF_PRINT("SSL",s);
371 #endif
372         if (i > 0) return;
373 #ifdef REF_CHECK
374         if (i < 0)
375                 {
376                 fprintf(stderr,"SSL_free, bad reference count\n");
377                 abort(); /* ok */
378                 }
379 #endif
380
381         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
382
383         if (s->bbio != NULL)
384                 {
385                 /* If the buffering BIO is in place, pop it off */
386                 if (s->bbio == s->wbio)
387                         {
388                         s->wbio=BIO_pop(s->wbio);
389                         }
390                 BIO_free(s->bbio);
391                 s->bbio=NULL;
392                 }
393         if (s->rbio != NULL)
394                 BIO_free_all(s->rbio);
395         if ((s->wbio != NULL) && (s->wbio != s->rbio))
396                 BIO_free_all(s->wbio);
397
398         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
399
400         /* add extra stuff */
401         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
402         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
403
404         /* Make the next call work :-) */
405         if (s->session != NULL)
406                 {
407                 ssl_clear_bad_session(s);
408                 SSL_SESSION_free(s->session);
409                 }
410
411         ssl_clear_cipher_ctx(s);
412
413         if (s->cert != NULL) ssl_cert_free(s->cert);
414         /* Free up if allocated */
415
416         if (s->ctx) SSL_CTX_free(s->ctx);
417
418         if (s->client_CA != NULL)
419                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
420
421         if (s->method != NULL) s->method->ssl_free(s);
422
423         OPENSSL_free(s);
424         }
425
426 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
427         {
428         /* If the output buffering BIO is still in place, remove it
429          */
430         if (s->bbio != NULL)
431                 {
432                 if (s->wbio == s->bbio)
433                         {
434                         s->wbio=s->wbio->next_bio;
435                         s->bbio->next_bio=NULL;
436                         }
437                 }
438         if ((s->rbio != NULL) && (s->rbio != rbio))
439                 BIO_free_all(s->rbio);
440         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
441                 BIO_free_all(s->wbio);
442         s->rbio=rbio;
443         s->wbio=wbio;
444         }
445
446 BIO *SSL_get_rbio(SSL *s)
447         { return(s->rbio); }
448
449 BIO *SSL_get_wbio(SSL *s)
450         { return(s->wbio); }
451
452 int SSL_get_fd(SSL *s)
453         {
454         int ret= -1;
455         BIO *b,*r;
456
457         b=SSL_get_rbio(s);
458         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
459         if (r != NULL)
460                 BIO_get_fd(r,&ret);
461         return(ret);
462         }
463
464 #ifndef OPENSSL_NO_SOCK
465 int SSL_set_fd(SSL *s,int fd)
466         {
467         int ret=0;
468         BIO *bio=NULL;
469
470         bio=BIO_new(BIO_s_socket());
471
472         if (bio == NULL)
473                 {
474                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
475                 goto err;
476                 }
477         BIO_set_fd(bio,fd,BIO_NOCLOSE);
478         SSL_set_bio(s,bio,bio);
479         ret=1;
480 err:
481         return(ret);
482         }
483
484 int SSL_set_wfd(SSL *s,int fd)
485         {
486         int ret=0;
487         BIO *bio=NULL;
488
489         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
490                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
491                 {
492                 bio=BIO_new(BIO_s_socket());
493
494                 if (bio == NULL)
495                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
496                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
497                 SSL_set_bio(s,SSL_get_rbio(s),bio);
498                 }
499         else
500                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
501         ret=1;
502 err:
503         return(ret);
504         }
505
506 int SSL_set_rfd(SSL *s,int fd)
507         {
508         int ret=0;
509         BIO *bio=NULL;
510
511         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
512                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
513                 {
514                 bio=BIO_new(BIO_s_socket());
515
516                 if (bio == NULL)
517                         {
518                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
519                         goto err;
520                         }
521                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
522                 SSL_set_bio(s,bio,SSL_get_wbio(s));
523                 }
524         else
525                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
526         ret=1;
527 err:
528         return(ret);
529         }
530 #endif
531
532
533 /* return length of latest Finished message we sent, copy to 'buf' */
534 size_t SSL_get_finished(SSL *s, void *buf, size_t count)
535         {
536         size_t ret = 0;
537         
538         if (s->s3 != NULL)
539                 {
540                 ret = s->s3->tmp.finish_md_len;
541                 if (count > ret)
542                         count = ret;
543                 memcpy(buf, s->s3->tmp.finish_md, count);
544                 }
545         return ret;
546         }
547
548 /* return length of latest Finished message we expected, copy to 'buf' */
549 size_t SSL_get_peer_finished(SSL *s, void *buf, size_t count)
550         {
551         size_t ret = 0;
552         
553         if (s->s3 != NULL)
554                 {
555                 ret = s->s3->tmp.peer_finish_md_len;
556                 if (count > ret)
557                         count = ret;
558                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
559                 }
560         return ret;
561         }
562
563
564 int SSL_get_verify_mode(SSL *s)
565         {
566         return(s->verify_mode);
567         }
568
569 int SSL_get_verify_depth(SSL *s)
570         {
571         return(s->verify_depth);
572         }
573
574 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
575         {
576         return(s->verify_callback);
577         }
578
579 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
580         {
581         return(ctx->verify_mode);
582         }
583
584 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
585         {
586         return(ctx->verify_depth);
587         }
588
589 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
590         {
591         return(ctx->default_verify_callback);
592         }
593
594 void SSL_set_verify(SSL *s,int mode,
595                     int (*callback)(int ok,X509_STORE_CTX *ctx))
596         {
597         s->verify_mode=mode;
598         if (callback != NULL)
599                 s->verify_callback=callback;
600         }
601
602 void SSL_set_verify_depth(SSL *s,int depth)
603         {
604         s->verify_depth=depth;
605         }
606
607 void SSL_set_read_ahead(SSL *s,int yes)
608         {
609         s->read_ahead=yes;
610         }
611
612 int SSL_get_read_ahead(SSL *s)
613         {
614         return(s->read_ahead);
615         }
616
617 int SSL_pending(SSL *s)
618         {
619         /* SSL_pending cannot work properly if read-ahead is enabled
620          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
621          * and it is impossible to fix since SSL_pending cannot report
622          * errors that may be observed while scanning the new data.
623          * (Note that SSL_pending() is often used as a boolean value,
624          * so we'd better not return -1.)
625          */
626         return(s->method->ssl_pending(s));
627         }
628
629 X509 *SSL_get_peer_certificate(SSL *s)
630         {
631         X509 *r;
632         
633         if ((s == NULL) || (s->session == NULL))
634                 r=NULL;
635         else
636                 r=s->session->peer;
637
638         if (r == NULL) return(r);
639
640         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
641
642         return(r);
643         }
644
645 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
646         {
647         STACK_OF(X509) *r;
648         
649         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
650                 r=NULL;
651         else
652                 r=s->session->sess_cert->cert_chain;
653
654         /* If we are a client, cert_chain includes the peer's own
655          * certificate; if we are a server, it does not. */
656         
657         return(r);
658         }
659
660 /* Now in theory, since the calling process own 't' it should be safe to
661  * modify.  We need to be able to read f without being hassled */
662 void SSL_copy_session_id(SSL *t,SSL *f)
663         {
664         CERT *tmp;
665
666         /* Do we need to to SSL locking? */
667         SSL_set_session(t,SSL_get_session(f));
668
669         /* what if we are setup as SSLv2 but want to talk SSLv3 or
670          * vice-versa */
671         if (t->method != f->method)
672                 {
673                 t->method->ssl_free(t); /* cleanup current */
674                 t->method=f->method;    /* change method */
675                 t->method->ssl_new(t);  /* setup new */
676                 }
677
678         tmp=t->cert;
679         if (f->cert != NULL)
680                 {
681                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
682                 t->cert=f->cert;
683                 }
684         else
685                 t->cert=NULL;
686         if (tmp != NULL) ssl_cert_free(tmp);
687         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
688         }
689
690 /* Fix this so it checks all the valid key/cert options */
691 int SSL_CTX_check_private_key(SSL_CTX *ctx)
692         {
693         if (    (ctx == NULL) ||
694                 (ctx->cert == NULL) ||
695                 (ctx->cert->key->x509 == NULL))
696                 {
697                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
698                 return(0);
699                 }
700         if      (ctx->cert->key->privatekey == NULL)
701                 {
702                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
703                 return(0);
704                 }
705         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
706         }
707
708 /* Fix this function so that it takes an optional type parameter */
709 int SSL_check_private_key(SSL *ssl)
710         {
711         if (ssl == NULL)
712                 {
713                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
714                 return(0);
715                 }
716         if (ssl->cert == NULL)
717                 {
718                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
719                 return 0;
720                 }
721         if (ssl->cert->key->x509 == NULL)
722                 {
723                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
724                 return(0);
725                 }
726         if (ssl->cert->key->privatekey == NULL)
727                 {
728                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
729                 return(0);
730                 }
731         return(X509_check_private_key(ssl->cert->key->x509,
732                 ssl->cert->key->privatekey));
733         }
734
735 int SSL_accept(SSL *s)
736         {
737         if (s->handshake_func == 0)
738                 /* Not properly initialized yet */
739                 SSL_set_accept_state(s);
740
741         return(s->method->ssl_accept(s));
742         }
743
744 int SSL_connect(SSL *s)
745         {
746         if (s->handshake_func == 0)
747                 /* Not properly initialized yet */
748                 SSL_set_connect_state(s);
749
750         return(s->method->ssl_connect(s));
751         }
752
753 long SSL_get_default_timeout(SSL *s)
754         {
755         return(s->method->get_timeout());
756         }
757
758 int SSL_read(SSL *s,char *buf,int num)
759         {
760         if (s->handshake_func == 0)
761                 {
762                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
763                 return -1;
764                 }
765
766         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
767                 {
768                 s->rwstate=SSL_NOTHING;
769                 return(0);
770                 }
771         return(s->method->ssl_read(s,buf,num));
772         }
773
774 int SSL_peek(SSL *s,char *buf,int num)
775         {
776         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
777                 {
778                 return(0);
779                 }
780         return(s->method->ssl_peek(s,buf,num));
781         }
782
783 int SSL_write(SSL *s,const char *buf,int num)
784         {
785         if (s->handshake_func == 0)
786                 {
787                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
788                 return -1;
789                 }
790
791         if (s->shutdown & SSL_SENT_SHUTDOWN)
792                 {
793                 s->rwstate=SSL_NOTHING;
794                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
795                 return(-1);
796                 }
797         return(s->method->ssl_write(s,buf,num));
798         }
799
800 int SSL_shutdown(SSL *s)
801         {
802         /* Note that this function behaves differently from what one might
803          * expect.  Return values are 0 for no success (yet),
804          * 1 for success; but calling it once is usually not enough,
805          * even if blocking I/O is used (see ssl3_shutdown).
806          */
807
808         if (s->handshake_func == 0)
809                 {
810                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
811                 return -1;
812                 }
813
814         if ((s != NULL) && !SSL_in_init(s))
815                 return(s->method->ssl_shutdown(s));
816         else
817                 return(1);
818         }
819
820 int SSL_renegotiate(SSL *s)
821         {
822         s->new_session=1;
823         return(s->method->ssl_renegotiate(s));
824         }
825
826 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
827         {
828         long l;
829
830         switch (cmd)
831                 {
832         case SSL_CTRL_GET_READ_AHEAD:
833                 return(s->read_ahead);
834         case SSL_CTRL_SET_READ_AHEAD:
835                 l=s->read_ahead;
836                 s->read_ahead=larg;
837                 return(l);
838         case SSL_CTRL_OPTIONS:
839                 return(s->options|=larg);
840         case SSL_CTRL_MODE:
841                 return(s->mode|=larg);
842         default:
843                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
844                 }
845         }
846
847 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)())
848         {
849         switch(cmd)
850                 {
851         default:
852                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
853                 }
854         }
855
856 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
857         {
858         return ctx->sessions;
859         }
860
861 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
862         {
863         long l;
864
865         switch (cmd)
866                 {
867         case SSL_CTRL_GET_READ_AHEAD:
868                 return(ctx->read_ahead);
869         case SSL_CTRL_SET_READ_AHEAD:
870                 l=ctx->read_ahead;
871                 ctx->read_ahead=larg;
872                 return(l);
873
874         case SSL_CTRL_SET_SESS_CACHE_SIZE:
875                 l=ctx->session_cache_size;
876                 ctx->session_cache_size=larg;
877                 return(l);
878         case SSL_CTRL_GET_SESS_CACHE_SIZE:
879                 return(ctx->session_cache_size);
880         case SSL_CTRL_SET_SESS_CACHE_MODE:
881                 l=ctx->session_cache_mode;
882                 ctx->session_cache_mode=larg;
883                 return(l);
884         case SSL_CTRL_GET_SESS_CACHE_MODE:
885                 return(ctx->session_cache_mode);
886
887         case SSL_CTRL_SESS_NUMBER:
888                 return(ctx->sessions->num_items);
889         case SSL_CTRL_SESS_CONNECT:
890                 return(ctx->stats.sess_connect);
891         case SSL_CTRL_SESS_CONNECT_GOOD:
892                 return(ctx->stats.sess_connect_good);
893         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
894                 return(ctx->stats.sess_connect_renegotiate);
895         case SSL_CTRL_SESS_ACCEPT:
896                 return(ctx->stats.sess_accept);
897         case SSL_CTRL_SESS_ACCEPT_GOOD:
898                 return(ctx->stats.sess_accept_good);
899         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
900                 return(ctx->stats.sess_accept_renegotiate);
901         case SSL_CTRL_SESS_HIT:
902                 return(ctx->stats.sess_hit);
903         case SSL_CTRL_SESS_CB_HIT:
904                 return(ctx->stats.sess_cb_hit);
905         case SSL_CTRL_SESS_MISSES:
906                 return(ctx->stats.sess_miss);
907         case SSL_CTRL_SESS_TIMEOUTS:
908                 return(ctx->stats.sess_timeout);
909         case SSL_CTRL_SESS_CACHE_FULL:
910                 return(ctx->stats.sess_cache_full);
911         case SSL_CTRL_OPTIONS:
912                 return(ctx->options|=larg);
913         case SSL_CTRL_MODE:
914                 return(ctx->mode|=larg);
915         default:
916                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
917                 }
918         }
919
920 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
921         {
922         switch(cmd)
923                 {
924         default:
925                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
926                 }
927         }
928
929 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
930         {
931         long l;
932
933         l=a->id-b->id;
934         if (l == 0L)
935                 return(0);
936         else
937                 return((l > 0)?1:-1);
938         }
939
940 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
941                         const SSL_CIPHER * const *bp)
942         {
943         long l;
944
945         l=(*ap)->id-(*bp)->id;
946         if (l == 0L)
947                 return(0);
948         else
949                 return((l > 0)?1:-1);
950         }
951
952 /** return a STACK of the ciphers available for the SSL and in order of
953  * preference */
954 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
955         {
956         if ((s != NULL) && (s->cipher_list != NULL))
957                 {
958                 return(s->cipher_list);
959                 }
960         else if ((s->ctx != NULL) &&
961                 (s->ctx->cipher_list != NULL))
962                 {
963                 return(s->ctx->cipher_list);
964                 }
965         return(NULL);
966         }
967
968 /** return a STACK of the ciphers available for the SSL and in order of
969  * algorithm id */
970 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
971         {
972         if ((s != NULL) && (s->cipher_list_by_id != NULL))
973                 {
974                 return(s->cipher_list_by_id);
975                 }
976         else if ((s != NULL) && (s->ctx != NULL) &&
977                 (s->ctx->cipher_list_by_id != NULL))
978                 {
979                 return(s->ctx->cipher_list_by_id);
980                 }
981         return(NULL);
982         }
983
984 /** The old interface to get the same thing as SSL_get_ciphers() */
985 const char *SSL_get_cipher_list(SSL *s,int n)
986         {
987         SSL_CIPHER *c;
988         STACK_OF(SSL_CIPHER) *sk;
989
990         if (s == NULL) return(NULL);
991         sk=SSL_get_ciphers(s);
992         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
993                 return(NULL);
994         c=sk_SSL_CIPHER_value(sk,n);
995         if (c == NULL) return(NULL);
996         return(c->name);
997         }
998
999 /** specify the ciphers to be used by default by the SSL_CTX */
1000 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1001         {
1002         STACK_OF(SSL_CIPHER) *sk;
1003         
1004         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1005                 &ctx->cipher_list_by_id,str);
1006 /* XXXX */
1007         return((sk == NULL)?0:1);
1008         }
1009
1010 /** specify the ciphers to be used by the SSL */
1011 int SSL_set_cipher_list(SSL *s,const char *str)
1012         {
1013         STACK_OF(SSL_CIPHER) *sk;
1014         
1015         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1016                 &s->cipher_list_by_id,str);
1017 /* XXXX */
1018         return((sk == NULL)?0:1);
1019         }
1020
1021 /* works well for SSLv2, not so good for SSLv3 */
1022 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
1023         {
1024         char *p;
1025         const char *cp;
1026         STACK_OF(SSL_CIPHER) *sk;
1027         SSL_CIPHER *c;
1028         int i;
1029
1030         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1031                 (len < 2))
1032                 return(NULL);
1033
1034         p=buf;
1035         sk=s->session->ciphers;
1036         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1037                 {
1038                 /* Decrement for either the ':' or a '\0' */
1039                 len--;
1040                 c=sk_SSL_CIPHER_value(sk,i);
1041                 for (cp=c->name; *cp; )
1042                         {
1043                         if (len-- == 0)
1044                                 {
1045                                 *p='\0';
1046                                 return(buf);
1047                                 }
1048                         else
1049                                 *(p++)= *(cp++);
1050                         }
1051                 *(p++)=':';
1052                 }
1053         p[-1]='\0';
1054         return(buf);
1055         }
1056
1057 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
1058         {
1059         int i,j=0;
1060         SSL_CIPHER *c;
1061         unsigned char *q;
1062
1063         if (sk == NULL) return(0);
1064         q=p;
1065
1066         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1067                 {
1068                 c=sk_SSL_CIPHER_value(sk,i);
1069                 j=ssl_put_cipher_by_char(s,c,p);
1070                 p+=j;
1071                 }
1072         return(p-q);
1073         }
1074
1075 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1076                                                STACK_OF(SSL_CIPHER) **skp)
1077         {
1078         SSL_CIPHER *c;
1079         STACK_OF(SSL_CIPHER) *sk;
1080         int i,n;
1081
1082         n=ssl_put_cipher_by_char(s,NULL,NULL);
1083         if ((num%n) != 0)
1084                 {
1085                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1086                 return(NULL);
1087                 }
1088         if ((skp == NULL) || (*skp == NULL))
1089                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1090         else
1091                 {
1092                 sk= *skp;
1093                 sk_SSL_CIPHER_zero(sk);
1094                 }
1095
1096         for (i=0; i<num; i+=n)
1097                 {
1098                 c=ssl_get_cipher_by_char(s,p);
1099                 p+=n;
1100                 if (c != NULL)
1101                         {
1102                         if (!sk_SSL_CIPHER_push(sk,c))
1103                                 {
1104                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1105                                 goto err;
1106                                 }
1107                         }
1108                 }
1109
1110         if (skp != NULL)
1111                 *skp=sk;
1112         return(sk);
1113 err:
1114         if ((skp == NULL) || (*skp == NULL))
1115                 sk_SSL_CIPHER_free(sk);
1116         return(NULL);
1117         }
1118
1119 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
1120         {
1121         unsigned long l;
1122
1123         l=(unsigned long)
1124                 ((unsigned int) a->session_id[0]     )|
1125                 ((unsigned int) a->session_id[1]<< 8L)|
1126                 ((unsigned long)a->session_id[2]<<16L)|
1127                 ((unsigned long)a->session_id[3]<<24L);
1128         return(l);
1129         }
1130
1131 /* NB: If this function (or indeed the hash function which uses a sort of
1132  * coarser function than this one) is changed, ensure
1133  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1134  * able to construct an SSL_SESSION that will collide with any existing session
1135  * with a matching session ID. */
1136 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
1137         {
1138         if (a->ssl_version != b->ssl_version)
1139                 return(1);
1140         if (a->session_id_length != b->session_id_length)
1141                 return(1);
1142         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1143         }
1144
1145 /* These wrapper functions should remain rather than redeclaring
1146  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1147  * variable. The reason is that the functions aren't static, they're exposed via
1148  * ssl.h. */
1149 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1150 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1151
1152 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1153         {
1154         SSL_CTX *ret=NULL;
1155         
1156         if (meth == NULL)
1157                 {
1158                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1159                 return(NULL);
1160                 }
1161
1162         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1163                 {
1164                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1165                 goto err;
1166                 }
1167         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1168         if (ret == NULL)
1169                 goto err;
1170
1171         memset(ret,0,sizeof(SSL_CTX));
1172
1173         ret->method=meth;
1174
1175         ret->cert_store=NULL;
1176         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1177         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1178         ret->session_cache_head=NULL;
1179         ret->session_cache_tail=NULL;
1180
1181         /* We take the system default */
1182         ret->session_timeout=meth->get_timeout();
1183
1184         ret->new_session_cb=NULL;
1185         ret->remove_session_cb=NULL;
1186         ret->get_session_cb=NULL;
1187         ret->generate_session_id=NULL;
1188
1189         memset((char *)&ret->stats,0,sizeof(ret->stats));
1190
1191         ret->references=1;
1192         ret->quiet_shutdown=0;
1193
1194 /*      ret->cipher=NULL;*/
1195 /*      ret->s2->challenge=NULL;
1196         ret->master_key=NULL;
1197         ret->key_arg=NULL;
1198         ret->s2->conn_id=NULL; */
1199
1200         ret->info_callback=NULL;
1201
1202         ret->app_verify_callback=NULL;
1203         ret->app_verify_arg=NULL;
1204
1205         ret->read_ahead=0;
1206         ret->verify_mode=SSL_VERIFY_NONE;
1207         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1208         ret->default_verify_callback=NULL;
1209         if ((ret->cert=ssl_cert_new()) == NULL)
1210                 goto err;
1211
1212         ret->default_passwd_callback=NULL;
1213         ret->default_passwd_callback_userdata=NULL;
1214         ret->client_cert_cb=NULL;
1215
1216         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1217                         LHASH_COMP_FN(SSL_SESSION_cmp));
1218         if (ret->sessions == NULL) goto err;
1219         ret->cert_store=X509_STORE_new();
1220         if (ret->cert_store == NULL) goto err;
1221
1222         ssl_create_cipher_list(ret->method,
1223                 &ret->cipher_list,&ret->cipher_list_by_id,
1224                 SSL_DEFAULT_CIPHER_LIST);
1225         if (ret->cipher_list == NULL
1226             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1227                 {
1228                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1229                 goto err2;
1230                 }
1231
1232         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1233                 {
1234                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1235                 goto err2;
1236                 }
1237         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1238                 {
1239                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1240                 goto err2;
1241                 }
1242         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1243                 {
1244                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1245                 goto err2;
1246                 }
1247
1248         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1249                 goto err;
1250
1251         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1252
1253         ret->extra_certs=NULL;
1254         ret->comp_methods=SSL_COMP_get_compression_methods();
1255
1256         return(ret);
1257 err:
1258         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1259 err2:
1260         if (ret != NULL) SSL_CTX_free(ret);
1261         return(NULL);
1262         }
1263
1264 #if 0
1265 static void SSL_COMP_free(SSL_COMP *comp)
1266     { OPENSSL_free(comp); }
1267 #endif
1268
1269 void SSL_CTX_free(SSL_CTX *a)
1270         {
1271         int i;
1272
1273         if (a == NULL) return;
1274
1275         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1276 #ifdef REF_PRINT
1277         REF_PRINT("SSL_CTX",a);
1278 #endif
1279         if (i > 0) return;
1280 #ifdef REF_CHECK
1281         if (i < 0)
1282                 {
1283                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1284                 abort(); /* ok */
1285                 }
1286 #endif
1287         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1288
1289         if (a->sessions != NULL)
1290                 {
1291                 SSL_CTX_flush_sessions(a,0);
1292                 lh_free(a->sessions);
1293                 }
1294         if (a->cert_store != NULL)
1295                 X509_STORE_free(a->cert_store);
1296         if (a->cipher_list != NULL)
1297                 sk_SSL_CIPHER_free(a->cipher_list);
1298         if (a->cipher_list_by_id != NULL)
1299                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1300         if (a->cert != NULL)
1301                 ssl_cert_free(a->cert);
1302         if (a->client_CA != NULL)
1303                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1304         if (a->extra_certs != NULL)
1305                 sk_X509_pop_free(a->extra_certs,X509_free);
1306 #if 0 /* This should never be done, since it removes a global database */
1307         if (a->comp_methods != NULL)
1308                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1309 #else
1310         a->comp_methods = NULL;
1311 #endif
1312         OPENSSL_free(a);
1313         }
1314
1315 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1316         {
1317         ctx->default_passwd_callback=cb;
1318         }
1319
1320 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1321         {
1322         ctx->default_passwd_callback_userdata=u;
1323         }
1324
1325 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1326         {
1327         /* now
1328          *     int (*cb)(X509_STORE_CTX *),
1329          * but should be
1330          *     int (*cb)(X509_STORE_CTX *, void *arg)
1331          */
1332         ctx->app_verify_callback=cb;
1333         ctx->app_verify_arg=arg; /* never used */
1334         }
1335
1336 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1337         {
1338         ctx->verify_mode=mode;
1339         ctx->default_verify_callback=cb;
1340         /* This needs cleaning up EAY EAY EAY */
1341         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1342         }
1343
1344 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1345         {
1346         ctx->verify_depth=depth;
1347         }
1348
1349 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1350         {
1351         CERT_PKEY *cpk;
1352         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1353         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1354         int rsa_tmp_export,dh_tmp_export,kl;
1355         unsigned long mask,emask;
1356
1357         if (c == NULL) return;
1358
1359         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1360
1361 #ifndef OPENSSL_NO_RSA
1362         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1363         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1364                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1365 #else
1366         rsa_tmp=rsa_tmp_export=0;
1367 #endif
1368 #ifndef OPENSSL_NO_DH
1369         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1370         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1371                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1372 #else
1373         dh_tmp=dh_tmp_export=0;
1374 #endif
1375
1376         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1377         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1378         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1379         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1380         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1381         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1382         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1383         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1384         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1385         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1386         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1387 /* FIX THIS EAY EAY EAY */
1388         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1389         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1390
1391         mask=0;
1392         emask=0;
1393
1394 #ifdef CIPHER_DEBUG
1395         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1396                 rsa_tmp,rsa_tmp_export,dh_tmp,
1397                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1398 #endif
1399
1400         if (rsa_enc || (rsa_tmp && rsa_sign))
1401                 mask|=SSL_kRSA;
1402         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1403                 emask|=SSL_kRSA;
1404
1405 #if 0
1406         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1407         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1408                 (rsa_enc || rsa_sign || dsa_sign))
1409                 mask|=SSL_kEDH;
1410         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1411                 (rsa_enc || rsa_sign || dsa_sign))
1412                 emask|=SSL_kEDH;
1413 #endif
1414
1415         if (dh_tmp_export) 
1416                 emask|=SSL_kEDH;
1417
1418         if (dh_tmp)
1419                 mask|=SSL_kEDH;
1420
1421         if (dh_rsa) mask|=SSL_kDHr;
1422         if (dh_rsa_export) emask|=SSL_kDHr;
1423
1424         if (dh_dsa) mask|=SSL_kDHd;
1425         if (dh_dsa_export) emask|=SSL_kDHd;
1426
1427         if (rsa_enc || rsa_sign)
1428                 {
1429                 mask|=SSL_aRSA;
1430                 emask|=SSL_aRSA;
1431                 }
1432
1433         if (dsa_sign)
1434                 {
1435                 mask|=SSL_aDSS;
1436                 emask|=SSL_aDSS;
1437                 }
1438
1439         mask|=SSL_aNULL;
1440         emask|=SSL_aNULL;
1441
1442 #ifndef OPENSSL_NO_KRB5
1443         mask|=SSL_kKRB5|SSL_aKRB5;
1444         emask|=SSL_kKRB5|SSL_aKRB5;
1445 #endif
1446
1447         c->mask=mask;
1448         c->export_mask=emask;
1449         c->valid=1;
1450         }
1451
1452 /* THIS NEEDS CLEANING UP */
1453 X509 *ssl_get_server_send_cert(SSL *s)
1454         {
1455         unsigned long alg,mask,kalg;
1456         CERT *c;
1457         int i,is_export;
1458
1459         c=s->cert;
1460         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1461         alg=s->s3->tmp.new_cipher->algorithms;
1462         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1463         mask=is_export?c->export_mask:c->mask;
1464         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1465
1466         if      (kalg & SSL_kDHr)
1467                 i=SSL_PKEY_DH_RSA;
1468         else if (kalg & SSL_kDHd)
1469                 i=SSL_PKEY_DH_DSA;
1470         else if (kalg & SSL_aDSS)
1471                 i=SSL_PKEY_DSA_SIGN;
1472         else if (kalg & SSL_aRSA)
1473                 {
1474                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1475                         i=SSL_PKEY_RSA_SIGN;
1476                 else
1477                         i=SSL_PKEY_RSA_ENC;
1478                 }
1479         else if (kalg & SSL_aKRB5)
1480                 {
1481                 /* VRS something else here? */
1482                 return(NULL);
1483                 }
1484         else /* if (kalg & SSL_aNULL) */
1485                 {
1486                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1487                 return(NULL);
1488                 }
1489         if (c->pkeys[i].x509 == NULL) return(NULL);
1490         return(c->pkeys[i].x509);
1491         }
1492
1493 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1494         {
1495         unsigned long alg;
1496         CERT *c;
1497
1498         alg=cipher->algorithms;
1499         c=s->cert;
1500
1501         if ((alg & SSL_aDSS) &&
1502                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1503                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1504         else if (alg & SSL_aRSA)
1505                 {
1506                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1507                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1508                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1509                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1510                 else
1511                         return(NULL);
1512                 }
1513         else /* if (alg & SSL_aNULL) */
1514                 {
1515                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1516                 return(NULL);
1517                 }
1518         }
1519
1520 void ssl_update_cache(SSL *s,int mode)
1521         {
1522         int i;
1523
1524         /* If the session_id_length is 0, we are not supposed to cache it,
1525          * and it would be rather hard to do anyway :-) */
1526         if (s->session->session_id_length == 0) return;
1527
1528         if ((s->ctx->session_cache_mode & mode)
1529                 && (!s->hit)
1530                 && SSL_CTX_add_session(s->ctx,s->session)
1531                 && (s->ctx->new_session_cb != NULL))
1532                 {
1533                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1534                 if (!s->ctx->new_session_cb(s,s->session))
1535                         SSL_SESSION_free(s->session);
1536                 }
1537
1538         /* auto flush every 255 connections */
1539         i=s->ctx->session_cache_mode;
1540         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1541                 ((i & mode) == mode))
1542                 {
1543                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1544                         ?s->ctx->stats.sess_connect_good
1545                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1546                         {
1547                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1548                         }
1549                 }
1550         }
1551
1552 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1553         {
1554         return(s->method);
1555         }
1556
1557 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1558         {
1559         int conn= -1;
1560         int ret=1;
1561
1562         if (s->method != meth)
1563                 {
1564                 if (s->handshake_func != NULL)
1565                         conn=(s->handshake_func == s->method->ssl_connect);
1566
1567                 if (s->method->version == meth->version)
1568                         s->method=meth;
1569                 else
1570                         {
1571                         s->method->ssl_free(s);
1572                         s->method=meth;
1573                         ret=s->method->ssl_new(s);
1574                         }
1575
1576                 if (conn == 1)
1577                         s->handshake_func=meth->ssl_connect;
1578                 else if (conn == 0)
1579                         s->handshake_func=meth->ssl_accept;
1580                 }
1581         return(ret);
1582         }
1583
1584 int SSL_get_error(SSL *s,int i)
1585         {
1586         int reason;
1587         unsigned long l;
1588         BIO *bio;
1589
1590         if (i > 0) return(SSL_ERROR_NONE);
1591
1592         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1593          * etc, where we do encode the error */
1594         if ((l=ERR_peek_error()) != 0)
1595                 {
1596                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1597                         return(SSL_ERROR_SYSCALL);
1598                 else
1599                         return(SSL_ERROR_SSL);
1600                 }
1601
1602         if ((i < 0) && SSL_want_read(s))
1603                 {
1604                 bio=SSL_get_rbio(s);
1605                 if (BIO_should_read(bio))
1606                         return(SSL_ERROR_WANT_READ);
1607                 else if (BIO_should_write(bio))
1608                         /* This one doesn't make too much sense ... We never try
1609                          * to write to the rbio, and an application program where
1610                          * rbio and wbio are separate couldn't even know what it
1611                          * should wait for.
1612                          * However if we ever set s->rwstate incorrectly
1613                          * (so that we have SSL_want_read(s) instead of
1614                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1615                          * this test works around that bug; so it might be safer
1616                          * to keep it. */
1617                         return(SSL_ERROR_WANT_WRITE);
1618                 else if (BIO_should_io_special(bio))
1619                         {
1620                         reason=BIO_get_retry_reason(bio);
1621                         if (reason == BIO_RR_CONNECT)
1622                                 return(SSL_ERROR_WANT_CONNECT);
1623                         else if (reason == BIO_RR_ACCEPT)
1624                                 return(SSL_ERROR_WANT_ACCEPT);
1625                         else
1626                                 return(SSL_ERROR_SYSCALL); /* unknown */
1627                         }
1628                 }
1629
1630         if ((i < 0) && SSL_want_write(s))
1631                 {
1632                 bio=SSL_get_wbio(s);
1633                 if (BIO_should_write(bio))
1634                         return(SSL_ERROR_WANT_WRITE);
1635                 else if (BIO_should_read(bio))
1636                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1637                         return(SSL_ERROR_WANT_READ);
1638                 else if (BIO_should_io_special(bio))
1639                         {
1640                         reason=BIO_get_retry_reason(bio);
1641                         if (reason == BIO_RR_CONNECT)
1642                                 return(SSL_ERROR_WANT_CONNECT);
1643                         else if (reason == BIO_RR_ACCEPT)
1644                                 return(SSL_ERROR_WANT_ACCEPT);
1645                         else
1646                                 return(SSL_ERROR_SYSCALL);
1647                         }
1648                 }
1649         if ((i < 0) && SSL_want_x509_lookup(s))
1650                 {
1651                 return(SSL_ERROR_WANT_X509_LOOKUP);
1652                 }
1653
1654         if (i == 0)
1655                 {
1656                 if (s->version == SSL2_VERSION)
1657                         {
1658                         /* assume it is the socket being closed */
1659                         return(SSL_ERROR_ZERO_RETURN);
1660                         }
1661                 else
1662                         {
1663                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1664                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1665                                 return(SSL_ERROR_ZERO_RETURN);
1666                         }
1667                 }
1668         return(SSL_ERROR_SYSCALL);
1669         }
1670
1671 int SSL_do_handshake(SSL *s)
1672         {
1673         int ret=1;
1674
1675         if (s->handshake_func == NULL)
1676                 {
1677                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1678                 return(-1);
1679                 }
1680
1681         s->method->ssl_renegotiate_check(s);
1682
1683         if (SSL_in_init(s) || SSL_in_before(s))
1684                 {
1685                 ret=s->handshake_func(s);
1686                 }
1687         return(ret);
1688         }
1689
1690 /* For the next 2 functions, SSL_clear() sets shutdown and so
1691  * one of these calls will reset it */
1692 void SSL_set_accept_state(SSL *s)
1693         {
1694         s->server=1;
1695         s->shutdown=0;
1696         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1697         s->handshake_func=s->method->ssl_accept;
1698         /* clear the current cipher */
1699         ssl_clear_cipher_ctx(s);
1700         }
1701
1702 void SSL_set_connect_state(SSL *s)
1703         {
1704         s->server=0;
1705         s->shutdown=0;
1706         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1707         s->handshake_func=s->method->ssl_connect;
1708         /* clear the current cipher */
1709         ssl_clear_cipher_ctx(s);
1710         }
1711
1712 int ssl_undefined_function(SSL *s)
1713         {
1714         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1715         return(0);
1716         }
1717
1718 SSL_METHOD *ssl_bad_method(int ver)
1719         {
1720         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1721         return(NULL);
1722         }
1723
1724 const char *SSL_get_version(SSL *s)
1725         {
1726         if (s->version == TLS1_VERSION)
1727                 return("TLSv1");
1728         else if (s->version == SSL3_VERSION)
1729                 return("SSLv3");
1730         else if (s->version == SSL2_VERSION)
1731                 return("SSLv2");
1732         else
1733                 return("unknown");
1734         }
1735
1736 SSL *SSL_dup(SSL *s)
1737         {
1738         STACK_OF(X509_NAME) *sk;
1739         X509_NAME *xn;
1740         SSL *ret;
1741         int i;
1742                  
1743         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1744             return(NULL);
1745                           
1746         if (s->session != NULL)
1747                 {
1748                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1749                 SSL_copy_session_id(ret,s);
1750                 }
1751         else
1752                 {
1753                 /* No session has been established yet, so we have to expect
1754                  * that s->cert or ret->cert will be changed later --
1755                  * they should not both point to the same object,
1756                  * and thus we can't use SSL_copy_session_id. */
1757
1758                 ret->method = s->method;
1759                 ret->method->ssl_new(ret);
1760
1761                 if (s->cert != NULL)
1762                         {
1763                         if (ret->cert != NULL)
1764                                 {
1765                                 ssl_cert_free(ret->cert);
1766                                 }
1767                         ret->cert = ssl_cert_dup(s->cert);
1768                         if (ret->cert == NULL)
1769                                 goto err;
1770                         }
1771                                 
1772                 SSL_set_session_id_context(ret,
1773                         s->sid_ctx, s->sid_ctx_length);
1774                 }
1775
1776         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1777         SSL_set_verify(ret,SSL_get_verify_mode(s),
1778                 SSL_get_verify_callback(s));
1779         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1780
1781         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1782         
1783         ret->debug=s->debug;
1784         ret->options=s->options;
1785
1786         /* copy app data, a little dangerous perhaps */
1787         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1788                 goto err;
1789
1790         /* setup rbio, and wbio */
1791         if (s->rbio != NULL)
1792                 {
1793                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1794                         goto err;
1795                 }
1796         if (s->wbio != NULL)
1797                 {
1798                 if (s->wbio != s->rbio)
1799                         {
1800                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1801                                 goto err;
1802                         }
1803                 else
1804                         ret->wbio=ret->rbio;
1805                 }
1806
1807         /* dup the cipher_list and cipher_list_by_id stacks */
1808         if (s->cipher_list != NULL)
1809                 {
1810                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1811                         goto err;
1812                 }
1813         if (s->cipher_list_by_id != NULL)
1814                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1815                         == NULL)
1816                         goto err;
1817
1818         /* Dup the client_CA list */
1819         if (s->client_CA != NULL)
1820                 {
1821                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1822                 ret->client_CA=sk;
1823                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1824                         {
1825                         xn=sk_X509_NAME_value(sk,i);
1826                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1827                                 {
1828                                 X509_NAME_free(xn);
1829                                 goto err;
1830                                 }
1831                         }
1832                 }
1833
1834         ret->shutdown=s->shutdown;
1835         ret->state=s->state;
1836         ret->handshake_func=s->handshake_func;
1837         ret->server=s->server;
1838
1839         if (0)
1840                 {
1841 err:
1842                 if (ret != NULL) SSL_free(ret);
1843                 ret=NULL;
1844                 }
1845         return(ret);
1846         }
1847
1848 void ssl_clear_cipher_ctx(SSL *s)
1849         {
1850         if (s->enc_read_ctx != NULL)
1851                 {
1852                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1853                 OPENSSL_free(s->enc_read_ctx);
1854                 s->enc_read_ctx=NULL;
1855                 }
1856         if (s->enc_write_ctx != NULL)
1857                 {
1858                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1859                 OPENSSL_free(s->enc_write_ctx);
1860                 s->enc_write_ctx=NULL;
1861                 }
1862         if (s->expand != NULL)
1863                 {
1864                 COMP_CTX_free(s->expand);
1865                 s->expand=NULL;
1866                 }
1867         if (s->compress != NULL)
1868                 {
1869                 COMP_CTX_free(s->compress);
1870                 s->compress=NULL;
1871                 }
1872         }
1873
1874 /* Fix this function so that it takes an optional type parameter */
1875 X509 *SSL_get_certificate(SSL *s)
1876         {
1877         if (s->cert != NULL)
1878                 return(s->cert->key->x509);
1879         else
1880                 return(NULL);
1881         }
1882
1883 /* Fix this function so that it takes an optional type parameter */
1884 EVP_PKEY *SSL_get_privatekey(SSL *s)
1885         {
1886         if (s->cert != NULL)
1887                 return(s->cert->key->privatekey);
1888         else
1889                 return(NULL);
1890         }
1891
1892 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1893         {
1894         if ((s->session != NULL) && (s->session->cipher != NULL))
1895                 return(s->session->cipher);
1896         return(NULL);
1897         }
1898
1899 int ssl_init_wbio_buffer(SSL *s,int push)
1900         {
1901         BIO *bbio;
1902
1903         if (s->bbio == NULL)
1904                 {
1905                 bbio=BIO_new(BIO_f_buffer());
1906                 if (bbio == NULL) return(0);
1907                 s->bbio=bbio;
1908                 }
1909         else
1910                 {
1911                 bbio=s->bbio;
1912                 if (s->bbio == s->wbio)
1913                         s->wbio=BIO_pop(s->wbio);
1914                 }
1915         (void)BIO_reset(bbio);
1916 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1917         if (!BIO_set_read_buffer_size(bbio,1))
1918                 {
1919                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1920                 return(0);
1921                 }
1922         if (push)
1923                 {
1924                 if (s->wbio != bbio)
1925                         s->wbio=BIO_push(bbio,s->wbio);
1926                 }
1927         else
1928                 {
1929                 if (s->wbio == bbio)
1930                         s->wbio=BIO_pop(bbio);
1931                 }
1932         return(1);
1933         }
1934
1935 void ssl_free_wbio_buffer(SSL *s)
1936         {
1937         if (s->bbio == NULL) return;
1938
1939         if (s->bbio == s->wbio)
1940                 {
1941                 /* remove buffering */
1942                 s->wbio=BIO_pop(s->wbio);
1943 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
1944                 assert(s->wbio != NULL);
1945 #endif  
1946         }
1947         BIO_free(s->bbio);
1948         s->bbio=NULL;
1949         }
1950         
1951 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1952         {
1953         ctx->quiet_shutdown=mode;
1954         }
1955
1956 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1957         {
1958         return(ctx->quiet_shutdown);
1959         }
1960
1961 void SSL_set_quiet_shutdown(SSL *s,int mode)
1962         {
1963         s->quiet_shutdown=mode;
1964         }
1965
1966 int SSL_get_quiet_shutdown(SSL *s)
1967         {
1968         return(s->quiet_shutdown);
1969         }
1970
1971 void SSL_set_shutdown(SSL *s,int mode)
1972         {
1973         s->shutdown=mode;
1974         }
1975
1976 int SSL_get_shutdown(SSL *s)
1977         {
1978         return(s->shutdown);
1979         }
1980
1981 int SSL_version(SSL *s)
1982         {
1983         return(s->version);
1984         }
1985
1986 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1987         {
1988         return(ssl->ctx);
1989         }
1990
1991 #ifndef OPENSSL_NO_STDIO
1992 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1993         {
1994         return(X509_STORE_set_default_paths(ctx->cert_store));
1995         }
1996
1997 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1998                 const char *CApath)
1999         {
2000         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2001         }
2002 #endif
2003
2004 void SSL_set_info_callback(SSL *ssl,void (*cb)())
2005         {
2006         ssl->info_callback=cb;
2007         }
2008
2009 void (*SSL_get_info_callback(SSL *ssl))(void)
2010         {
2011         return((void (*)())ssl->info_callback);
2012         }
2013
2014 int SSL_state(SSL *ssl)
2015         {
2016         return(ssl->state);
2017         }
2018
2019 void SSL_set_verify_result(SSL *ssl,long arg)
2020         {
2021         ssl->verify_result=arg;
2022         }
2023
2024 long SSL_get_verify_result(SSL *ssl)
2025         {
2026         return(ssl->verify_result);
2027         }
2028
2029 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2030                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2031         {
2032         ssl_meth_num++;
2033         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
2034                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
2035         }
2036
2037 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2038         {
2039         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2040         }
2041
2042 void *SSL_get_ex_data(SSL *s,int idx)
2043         {
2044         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2045         }
2046
2047 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2048                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2049         {
2050         ssl_ctx_meth_num++;
2051         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
2052                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
2053         }
2054
2055 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2056         {
2057         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2058         }
2059
2060 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
2061         {
2062         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2063         }
2064
2065 int ssl_ok(SSL *s)
2066         {
2067         return(1);
2068         }
2069
2070 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
2071         {
2072         return(ctx->cert_store);
2073         }
2074
2075 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2076         {
2077         if (ctx->cert_store != NULL)
2078                 X509_STORE_free(ctx->cert_store);
2079         ctx->cert_store=store;
2080         }
2081
2082 int SSL_want(SSL *s)
2083         {
2084         return(s->rwstate);
2085         }
2086
2087 /*!
2088  * \brief Set the callback for generating temporary RSA keys.
2089  * \param ctx the SSL context.
2090  * \param cb the callback
2091  */
2092
2093 #ifndef OPENSSL_NO_RSA
2094 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2095                                                           int is_export,
2096                                                           int keylength))
2097     {
2098     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2099     }
2100
2101 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2102                                                   int is_export,
2103                                                   int keylength))
2104     {
2105     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2106     }
2107 #endif
2108
2109 #ifdef DOXYGEN
2110 /*!
2111  * \brief The RSA temporary key callback function.
2112  * \param ssl the SSL session.
2113  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2114  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2115  * of the required key in bits.
2116  * \return the temporary RSA key.
2117  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2118  */
2119
2120 RSA *cb(SSL *ssl,int is_export,int keylength)
2121     {}
2122 #endif
2123
2124 /*!
2125  * \brief Set the callback for generating temporary DH keys.
2126  * \param ctx the SSL context.
2127  * \param dh the callback
2128  */
2129
2130 #ifndef OPENSSL_NO_DH
2131 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2132                                                         int keylength))
2133     {
2134     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2135     }
2136
2137 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2138                                                 int keylength))
2139     {
2140     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2141     }
2142 #endif
2143
2144 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2145 #include "../crypto/bio/bss_file.c"
2146 #endif
2147
2148 IMPLEMENT_STACK_OF(SSL_CIPHER)
2149 IMPLEMENT_STACK_OF(SSL_COMP)