9a593ed2a5fe1a755ea2fbca45598fd4b749cbc3
[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,ERR_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_has_matching_session_id(const SSL *ssl, 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. */
310         SSL_SESSION r, *p;
311         r.ssl_version = ssl->version;
312         r.session_id_length = id_len;
313         memcpy(r.session_id, id, id_len);
314         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
315          * callback is calling us to check the uniqueness of a shorter ID, it
316          * must be compared as a padded-out ID because that is what it will be
317          * converted to when the callback has finished choosing it. */
318         if((r.ssl_version == SSL2_VERSION) &&
319                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
320                 {
321                 memset(r.session_id + id_len, 0,
322                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
323                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
324                 }
325
326         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
327         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
328         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
329         return (p != NULL);
330         }
331
332 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
333 {
334         if(X509_PURPOSE_get_by_id(purpose) == -1) {
335                 SSLerr(SSL_F_SSL_CTX_SET_PURPOSE, SSL_R_INVALID_PURPOSE);
336                 return 0;
337         }
338         s->purpose = purpose;
339         return 1;
340 }
341
342 int SSL_set_purpose(SSL *s, int purpose)
343 {
344         if(X509_PURPOSE_get_by_id(purpose) == -1) {
345                 SSLerr(SSL_F_SSL_SET_PURPOSE, SSL_R_INVALID_PURPOSE);
346                 return 0;
347         }
348         s->purpose = purpose;
349         return 1;
350 }
351         
352 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
353 {
354         if(X509_TRUST_get_by_id(trust) == -1) {
355                 SSLerr(SSL_F_SSL_CTX_SET_TRUST, SSL_R_INVALID_TRUST);
356                 return 0;
357         }
358         s->trust = trust;
359         return 1;
360 }
361
362 int SSL_set_trust(SSL *s, int trust)
363 {
364         if(X509_TRUST_get_by_id(trust) == -1) {
365                 SSLerr(SSL_F_SSL_SET_TRUST, SSL_R_INVALID_TRUST);
366                 return 0;
367         }
368         s->trust = trust;
369         return 1;
370 }
371
372 void SSL_free(SSL *s)
373         {
374         int i;
375
376         if(s == NULL)
377             return;
378
379         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
380 #ifdef REF_PRINT
381         REF_PRINT("SSL",s);
382 #endif
383         if (i > 0) return;
384 #ifdef REF_CHECK
385         if (i < 0)
386                 {
387                 fprintf(stderr,"SSL_free, bad reference count\n");
388                 abort(); /* ok */
389                 }
390 #endif
391
392         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
393
394         if (s->bbio != NULL)
395                 {
396                 /* If the buffering BIO is in place, pop it off */
397                 if (s->bbio == s->wbio)
398                         {
399                         s->wbio=BIO_pop(s->wbio);
400                         }
401                 BIO_free(s->bbio);
402                 s->bbio=NULL;
403                 }
404         if (s->rbio != NULL)
405                 BIO_free_all(s->rbio);
406         if ((s->wbio != NULL) && (s->wbio != s->rbio))
407                 BIO_free_all(s->wbio);
408
409         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
410
411         /* add extra stuff */
412         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
413         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
414
415         /* Make the next call work :-) */
416         if (s->session != NULL)
417                 {
418                 ssl_clear_bad_session(s);
419                 SSL_SESSION_free(s->session);
420                 }
421
422         ssl_clear_cipher_ctx(s);
423
424         if (s->cert != NULL) ssl_cert_free(s->cert);
425         /* Free up if allocated */
426
427         if (s->ctx) SSL_CTX_free(s->ctx);
428
429         if (s->client_CA != NULL)
430                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
431
432         if (s->method != NULL) s->method->ssl_free(s);
433
434         OPENSSL_free(s);
435         }
436
437 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
438         {
439         /* If the output buffering BIO is still in place, remove it
440          */
441         if (s->bbio != NULL)
442                 {
443                 if (s->wbio == s->bbio)
444                         {
445                         s->wbio=s->wbio->next_bio;
446                         s->bbio->next_bio=NULL;
447                         }
448                 }
449         if ((s->rbio != NULL) && (s->rbio != rbio))
450                 BIO_free_all(s->rbio);
451         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
452                 BIO_free_all(s->wbio);
453         s->rbio=rbio;
454         s->wbio=wbio;
455         }
456
457 BIO *SSL_get_rbio(SSL *s)
458         { return(s->rbio); }
459
460 BIO *SSL_get_wbio(SSL *s)
461         { return(s->wbio); }
462
463 int SSL_get_fd(SSL *s)
464         {
465         int ret= -1;
466         BIO *b,*r;
467
468         b=SSL_get_rbio(s);
469         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
470         if (r != NULL)
471                 BIO_get_fd(r,&ret);
472         return(ret);
473         }
474
475 #ifndef OPENSSL_NO_SOCK
476 int SSL_set_fd(SSL *s,int fd)
477         {
478         int ret=0;
479         BIO *bio=NULL;
480
481         bio=BIO_new(BIO_s_socket());
482
483         if (bio == NULL)
484                 {
485                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
486                 goto err;
487                 }
488         BIO_set_fd(bio,fd,BIO_NOCLOSE);
489         SSL_set_bio(s,bio,bio);
490         ret=1;
491 err:
492         return(ret);
493         }
494
495 int SSL_set_wfd(SSL *s,int fd)
496         {
497         int ret=0;
498         BIO *bio=NULL;
499
500         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
501                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
502                 {
503                 bio=BIO_new(BIO_s_socket());
504
505                 if (bio == NULL)
506                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
507                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
508                 SSL_set_bio(s,SSL_get_rbio(s),bio);
509                 }
510         else
511                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
512         ret=1;
513 err:
514         return(ret);
515         }
516
517 int SSL_set_rfd(SSL *s,int fd)
518         {
519         int ret=0;
520         BIO *bio=NULL;
521
522         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
523                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
524                 {
525                 bio=BIO_new(BIO_s_socket());
526
527                 if (bio == NULL)
528                         {
529                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
530                         goto err;
531                         }
532                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
533                 SSL_set_bio(s,bio,SSL_get_wbio(s));
534                 }
535         else
536                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
537         ret=1;
538 err:
539         return(ret);
540         }
541 #endif
542
543
544 /* return length of latest Finished message we sent, copy to 'buf' */
545 size_t SSL_get_finished(SSL *s, void *buf, size_t count)
546         {
547         size_t ret = 0;
548         
549         if (s->s3 != NULL)
550                 {
551                 ret = s->s3->tmp.finish_md_len;
552                 if (count > ret)
553                         count = ret;
554                 memcpy(buf, s->s3->tmp.finish_md, count);
555                 }
556         return ret;
557         }
558
559 /* return length of latest Finished message we expected, copy to 'buf' */
560 size_t SSL_get_peer_finished(SSL *s, void *buf, size_t count)
561         {
562         size_t ret = 0;
563         
564         if (s->s3 != NULL)
565                 {
566                 ret = s->s3->tmp.peer_finish_md_len;
567                 if (count > ret)
568                         count = ret;
569                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
570                 }
571         return ret;
572         }
573
574
575 int SSL_get_verify_mode(SSL *s)
576         {
577         return(s->verify_mode);
578         }
579
580 int SSL_get_verify_depth(SSL *s)
581         {
582         return(s->verify_depth);
583         }
584
585 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
586         {
587         return(s->verify_callback);
588         }
589
590 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
591         {
592         return(ctx->verify_mode);
593         }
594
595 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
596         {
597         return(ctx->verify_depth);
598         }
599
600 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
601         {
602         return(ctx->default_verify_callback);
603         }
604
605 void SSL_set_verify(SSL *s,int mode,
606                     int (*callback)(int ok,X509_STORE_CTX *ctx))
607         {
608         s->verify_mode=mode;
609         if (callback != NULL)
610                 s->verify_callback=callback;
611         }
612
613 void SSL_set_verify_depth(SSL *s,int depth)
614         {
615         s->verify_depth=depth;
616         }
617
618 void SSL_set_read_ahead(SSL *s,int yes)
619         {
620         s->read_ahead=yes;
621         }
622
623 int SSL_get_read_ahead(SSL *s)
624         {
625         return(s->read_ahead);
626         }
627
628 int SSL_pending(SSL *s)
629         {
630         /* SSL_pending cannot work properly if read-ahead is enabled
631          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
632          * and it is impossible to fix since SSL_pending cannot report
633          * errors that may be observed while scanning the new data.
634          * (Note that SSL_pending() is often used as a boolean value,
635          * so we'd better not return -1.)
636          */
637         return(s->method->ssl_pending(s));
638         }
639
640 X509 *SSL_get_peer_certificate(SSL *s)
641         {
642         X509 *r;
643         
644         if ((s == NULL) || (s->session == NULL))
645                 r=NULL;
646         else
647                 r=s->session->peer;
648
649         if (r == NULL) return(r);
650
651         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
652
653         return(r);
654         }
655
656 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
657         {
658         STACK_OF(X509) *r;
659         
660         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
661                 r=NULL;
662         else
663                 r=s->session->sess_cert->cert_chain;
664
665         /* If we are a client, cert_chain includes the peer's own
666          * certificate; if we are a server, it does not. */
667         
668         return(r);
669         }
670
671 /* Now in theory, since the calling process own 't' it should be safe to
672  * modify.  We need to be able to read f without being hassled */
673 void SSL_copy_session_id(SSL *t,SSL *f)
674         {
675         CERT *tmp;
676
677         /* Do we need to to SSL locking? */
678         SSL_set_session(t,SSL_get_session(f));
679
680         /* what if we are setup as SSLv2 but want to talk SSLv3 or
681          * vice-versa */
682         if (t->method != f->method)
683                 {
684                 t->method->ssl_free(t); /* cleanup current */
685                 t->method=f->method;    /* change method */
686                 t->method->ssl_new(t);  /* setup new */
687                 }
688
689         tmp=t->cert;
690         if (f->cert != NULL)
691                 {
692                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
693                 t->cert=f->cert;
694                 }
695         else
696                 t->cert=NULL;
697         if (tmp != NULL) ssl_cert_free(tmp);
698         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
699         }
700
701 /* Fix this so it checks all the valid key/cert options */
702 int SSL_CTX_check_private_key(SSL_CTX *ctx)
703         {
704         if (    (ctx == NULL) ||
705                 (ctx->cert == NULL) ||
706                 (ctx->cert->key->x509 == NULL))
707                 {
708                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
709                 return(0);
710                 }
711         if      (ctx->cert->key->privatekey == NULL)
712                 {
713                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
714                 return(0);
715                 }
716         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
717         }
718
719 /* Fix this function so that it takes an optional type parameter */
720 int SSL_check_private_key(SSL *ssl)
721         {
722         if (ssl == NULL)
723                 {
724                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
725                 return(0);
726                 }
727         if (ssl->cert == NULL)
728                 {
729                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
730                 return 0;
731                 }
732         if (ssl->cert->key->x509 == NULL)
733                 {
734                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
735                 return(0);
736                 }
737         if (ssl->cert->key->privatekey == NULL)
738                 {
739                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
740                 return(0);
741                 }
742         return(X509_check_private_key(ssl->cert->key->x509,
743                 ssl->cert->key->privatekey));
744         }
745
746 int SSL_accept(SSL *s)
747         {
748         if (s->handshake_func == 0)
749                 /* Not properly initialized yet */
750                 SSL_set_accept_state(s);
751
752         return(s->method->ssl_accept(s));
753         }
754
755 int SSL_connect(SSL *s)
756         {
757         if (s->handshake_func == 0)
758                 /* Not properly initialized yet */
759                 SSL_set_connect_state(s);
760
761         return(s->method->ssl_connect(s));
762         }
763
764 long SSL_get_default_timeout(SSL *s)
765         {
766         return(s->method->get_timeout());
767         }
768
769 int SSL_read(SSL *s,char *buf,int num)
770         {
771         if (s->handshake_func == 0)
772                 {
773                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
774                 return -1;
775                 }
776
777         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
778                 {
779                 s->rwstate=SSL_NOTHING;
780                 return(0);
781                 }
782         return(s->method->ssl_read(s,buf,num));
783         }
784
785 int SSL_peek(SSL *s,char *buf,int num)
786         {
787         if (s->handshake_func == 0)
788                 {
789                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
790                 return -1;
791                 }
792
793         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
794                 {
795                 return(0);
796                 }
797         return(s->method->ssl_peek(s,buf,num));
798         }
799
800 int SSL_write(SSL *s,const char *buf,int num)
801         {
802         if (s->handshake_func == 0)
803                 {
804                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
805                 return -1;
806                 }
807
808         if (s->shutdown & SSL_SENT_SHUTDOWN)
809                 {
810                 s->rwstate=SSL_NOTHING;
811                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
812                 return(-1);
813                 }
814         return(s->method->ssl_write(s,buf,num));
815         }
816
817 int SSL_shutdown(SSL *s)
818         {
819         /* Note that this function behaves differently from what one might
820          * expect.  Return values are 0 for no success (yet),
821          * 1 for success; but calling it once is usually not enough,
822          * even if blocking I/O is used (see ssl3_shutdown).
823          */
824
825         if (s->handshake_func == 0)
826                 {
827                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
828                 return -1;
829                 }
830
831         if ((s != NULL) && !SSL_in_init(s))
832                 return(s->method->ssl_shutdown(s));
833         else
834                 return(1);
835         }
836
837 int SSL_renegotiate(SSL *s)
838         {
839         s->new_session=1;
840         return(s->method->ssl_renegotiate(s));
841         }
842
843 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
844         {
845         long l;
846
847         switch (cmd)
848                 {
849         case SSL_CTRL_GET_READ_AHEAD:
850                 return(s->read_ahead);
851         case SSL_CTRL_SET_READ_AHEAD:
852                 l=s->read_ahead;
853                 s->read_ahead=larg;
854                 return(l);
855         case SSL_CTRL_OPTIONS:
856                 return(s->options|=larg);
857         case SSL_CTRL_MODE:
858                 return(s->mode|=larg);
859         default:
860                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
861                 }
862         }
863
864 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)())
865         {
866         switch(cmd)
867                 {
868         default:
869                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
870                 }
871         }
872
873 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
874         {
875         return ctx->sessions;
876         }
877
878 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
879         {
880         long l;
881
882         switch (cmd)
883                 {
884         case SSL_CTRL_GET_READ_AHEAD:
885                 return(ctx->read_ahead);
886         case SSL_CTRL_SET_READ_AHEAD:
887                 l=ctx->read_ahead;
888                 ctx->read_ahead=larg;
889                 return(l);
890
891         case SSL_CTRL_SET_SESS_CACHE_SIZE:
892                 l=ctx->session_cache_size;
893                 ctx->session_cache_size=larg;
894                 return(l);
895         case SSL_CTRL_GET_SESS_CACHE_SIZE:
896                 return(ctx->session_cache_size);
897         case SSL_CTRL_SET_SESS_CACHE_MODE:
898                 l=ctx->session_cache_mode;
899                 ctx->session_cache_mode=larg;
900                 return(l);
901         case SSL_CTRL_GET_SESS_CACHE_MODE:
902                 return(ctx->session_cache_mode);
903
904         case SSL_CTRL_SESS_NUMBER:
905                 return(ctx->sessions->num_items);
906         case SSL_CTRL_SESS_CONNECT:
907                 return(ctx->stats.sess_connect);
908         case SSL_CTRL_SESS_CONNECT_GOOD:
909                 return(ctx->stats.sess_connect_good);
910         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
911                 return(ctx->stats.sess_connect_renegotiate);
912         case SSL_CTRL_SESS_ACCEPT:
913                 return(ctx->stats.sess_accept);
914         case SSL_CTRL_SESS_ACCEPT_GOOD:
915                 return(ctx->stats.sess_accept_good);
916         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
917                 return(ctx->stats.sess_accept_renegotiate);
918         case SSL_CTRL_SESS_HIT:
919                 return(ctx->stats.sess_hit);
920         case SSL_CTRL_SESS_CB_HIT:
921                 return(ctx->stats.sess_cb_hit);
922         case SSL_CTRL_SESS_MISSES:
923                 return(ctx->stats.sess_miss);
924         case SSL_CTRL_SESS_TIMEOUTS:
925                 return(ctx->stats.sess_timeout);
926         case SSL_CTRL_SESS_CACHE_FULL:
927                 return(ctx->stats.sess_cache_full);
928         case SSL_CTRL_OPTIONS:
929                 return(ctx->options|=larg);
930         case SSL_CTRL_MODE:
931                 return(ctx->mode|=larg);
932         default:
933                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
934                 }
935         }
936
937 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
938         {
939         switch(cmd)
940                 {
941         default:
942                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
943                 }
944         }
945
946 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
947         {
948         long l;
949
950         l=a->id-b->id;
951         if (l == 0L)
952                 return(0);
953         else
954                 return((l > 0)?1:-1);
955         }
956
957 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
958                         const SSL_CIPHER * const *bp)
959         {
960         long l;
961
962         l=(*ap)->id-(*bp)->id;
963         if (l == 0L)
964                 return(0);
965         else
966                 return((l > 0)?1:-1);
967         }
968
969 /** return a STACK of the ciphers available for the SSL and in order of
970  * preference */
971 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
972         {
973         if ((s != NULL) && (s->cipher_list != NULL))
974                 {
975                 return(s->cipher_list);
976                 }
977         else if ((s->ctx != NULL) &&
978                 (s->ctx->cipher_list != NULL))
979                 {
980                 return(s->ctx->cipher_list);
981                 }
982         return(NULL);
983         }
984
985 /** return a STACK of the ciphers available for the SSL and in order of
986  * algorithm id */
987 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
988         {
989         if ((s != NULL) && (s->cipher_list_by_id != NULL))
990                 {
991                 return(s->cipher_list_by_id);
992                 }
993         else if ((s != NULL) && (s->ctx != NULL) &&
994                 (s->ctx->cipher_list_by_id != NULL))
995                 {
996                 return(s->ctx->cipher_list_by_id);
997                 }
998         return(NULL);
999         }
1000
1001 /** The old interface to get the same thing as SSL_get_ciphers() */
1002 const char *SSL_get_cipher_list(SSL *s,int n)
1003         {
1004         SSL_CIPHER *c;
1005         STACK_OF(SSL_CIPHER) *sk;
1006
1007         if (s == NULL) return(NULL);
1008         sk=SSL_get_ciphers(s);
1009         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1010                 return(NULL);
1011         c=sk_SSL_CIPHER_value(sk,n);
1012         if (c == NULL) return(NULL);
1013         return(c->name);
1014         }
1015
1016 /** specify the ciphers to be used by default by the SSL_CTX */
1017 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1018         {
1019         STACK_OF(SSL_CIPHER) *sk;
1020         
1021         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1022                 &ctx->cipher_list_by_id,str);
1023 /* XXXX */
1024         return((sk == NULL)?0:1);
1025         }
1026
1027 /** specify the ciphers to be used by the SSL */
1028 int SSL_set_cipher_list(SSL *s,const char *str)
1029         {
1030         STACK_OF(SSL_CIPHER) *sk;
1031         
1032         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1033                 &s->cipher_list_by_id,str);
1034 /* XXXX */
1035         return((sk == NULL)?0:1);
1036         }
1037
1038 /* works well for SSLv2, not so good for SSLv3 */
1039 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
1040         {
1041         char *p;
1042         const char *cp;
1043         STACK_OF(SSL_CIPHER) *sk;
1044         SSL_CIPHER *c;
1045         int i;
1046
1047         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1048                 (len < 2))
1049                 return(NULL);
1050
1051         p=buf;
1052         sk=s->session->ciphers;
1053         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1054                 {
1055                 /* Decrement for either the ':' or a '\0' */
1056                 len--;
1057                 c=sk_SSL_CIPHER_value(sk,i);
1058                 for (cp=c->name; *cp; )
1059                         {
1060                         if (len-- == 0)
1061                                 {
1062                                 *p='\0';
1063                                 return(buf);
1064                                 }
1065                         else
1066                                 *(p++)= *(cp++);
1067                         }
1068                 *(p++)=':';
1069                 }
1070         p[-1]='\0';
1071         return(buf);
1072         }
1073
1074 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
1075         {
1076         int i,j=0;
1077         SSL_CIPHER *c;
1078         unsigned char *q;
1079
1080         if (sk == NULL) return(0);
1081         q=p;
1082
1083         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1084                 {
1085                 c=sk_SSL_CIPHER_value(sk,i);
1086                 j=ssl_put_cipher_by_char(s,c,p);
1087                 p+=j;
1088                 }
1089         return(p-q);
1090         }
1091
1092 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1093                                                STACK_OF(SSL_CIPHER) **skp)
1094         {
1095         SSL_CIPHER *c;
1096         STACK_OF(SSL_CIPHER) *sk;
1097         int i,n;
1098
1099         n=ssl_put_cipher_by_char(s,NULL,NULL);
1100         if ((num%n) != 0)
1101                 {
1102                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1103                 return(NULL);
1104                 }
1105         if ((skp == NULL) || (*skp == NULL))
1106                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1107         else
1108                 {
1109                 sk= *skp;
1110                 sk_SSL_CIPHER_zero(sk);
1111                 }
1112
1113         for (i=0; i<num; i+=n)
1114                 {
1115                 c=ssl_get_cipher_by_char(s,p);
1116                 p+=n;
1117                 if (c != NULL)
1118                         {
1119                         if (!sk_SSL_CIPHER_push(sk,c))
1120                                 {
1121                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1122                                 goto err;
1123                                 }
1124                         }
1125                 }
1126
1127         if (skp != NULL)
1128                 *skp=sk;
1129         return(sk);
1130 err:
1131         if ((skp == NULL) || (*skp == NULL))
1132                 sk_SSL_CIPHER_free(sk);
1133         return(NULL);
1134         }
1135
1136 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
1137         {
1138         unsigned long l;
1139
1140         l=(unsigned long)
1141                 ((unsigned int) a->session_id[0]     )|
1142                 ((unsigned int) a->session_id[1]<< 8L)|
1143                 ((unsigned long)a->session_id[2]<<16L)|
1144                 ((unsigned long)a->session_id[3]<<24L);
1145         return(l);
1146         }
1147
1148 /* NB: If this function (or indeed the hash function which uses a sort of
1149  * coarser function than this one) is changed, ensure
1150  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1151  * able to construct an SSL_SESSION that will collide with any existing session
1152  * with a matching session ID. */
1153 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
1154         {
1155         if (a->ssl_version != b->ssl_version)
1156                 return(1);
1157         if (a->session_id_length != b->session_id_length)
1158                 return(1);
1159         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1160         }
1161
1162 /* These wrapper functions should remain rather than redeclaring
1163  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1164  * variable. The reason is that the functions aren't static, they're exposed via
1165  * ssl.h. */
1166 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1167 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1168
1169 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1170         {
1171         SSL_CTX *ret=NULL;
1172         
1173         if (meth == NULL)
1174                 {
1175                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1176                 return(NULL);
1177                 }
1178
1179         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1180                 {
1181                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1182                 goto err;
1183                 }
1184         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1185         if (ret == NULL)
1186                 goto err;
1187
1188         memset(ret,0,sizeof(SSL_CTX));
1189
1190         ret->method=meth;
1191
1192         ret->cert_store=NULL;
1193         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1194         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1195         ret->session_cache_head=NULL;
1196         ret->session_cache_tail=NULL;
1197
1198         /* We take the system default */
1199         ret->session_timeout=meth->get_timeout();
1200
1201         ret->new_session_cb=NULL;
1202         ret->remove_session_cb=NULL;
1203         ret->get_session_cb=NULL;
1204         ret->generate_session_id=NULL;
1205
1206         memset((char *)&ret->stats,0,sizeof(ret->stats));
1207
1208         ret->references=1;
1209         ret->quiet_shutdown=0;
1210
1211 /*      ret->cipher=NULL;*/
1212 /*      ret->s2->challenge=NULL;
1213         ret->master_key=NULL;
1214         ret->key_arg=NULL;
1215         ret->s2->conn_id=NULL; */
1216
1217         ret->info_callback=NULL;
1218
1219         ret->app_verify_callback=NULL;
1220         ret->app_verify_arg=NULL;
1221
1222         ret->read_ahead=0;
1223         ret->verify_mode=SSL_VERIFY_NONE;
1224         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1225         ret->default_verify_callback=NULL;
1226         if ((ret->cert=ssl_cert_new()) == NULL)
1227                 goto err;
1228
1229         ret->default_passwd_callback=NULL;
1230         ret->default_passwd_callback_userdata=NULL;
1231         ret->client_cert_cb=NULL;
1232
1233         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1234                         LHASH_COMP_FN(SSL_SESSION_cmp));
1235         if (ret->sessions == NULL) goto err;
1236         ret->cert_store=X509_STORE_new();
1237         if (ret->cert_store == NULL) goto err;
1238
1239         ssl_create_cipher_list(ret->method,
1240                 &ret->cipher_list,&ret->cipher_list_by_id,
1241                 SSL_DEFAULT_CIPHER_LIST);
1242         if (ret->cipher_list == NULL
1243             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1244                 {
1245                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1246                 goto err2;
1247                 }
1248
1249         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1250                 {
1251                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1252                 goto err2;
1253                 }
1254         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1255                 {
1256                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1257                 goto err2;
1258                 }
1259         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1260                 {
1261                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1262                 goto err2;
1263                 }
1264
1265         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1266                 goto err;
1267
1268         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1269
1270         ret->extra_certs=NULL;
1271         ret->comp_methods=SSL_COMP_get_compression_methods();
1272
1273         return(ret);
1274 err:
1275         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1276 err2:
1277         if (ret != NULL) SSL_CTX_free(ret);
1278         return(NULL);
1279         }
1280
1281 #if 0
1282 static void SSL_COMP_free(SSL_COMP *comp)
1283     { OPENSSL_free(comp); }
1284 #endif
1285
1286 void SSL_CTX_free(SSL_CTX *a)
1287         {
1288         int i;
1289
1290         if (a == NULL) return;
1291
1292         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1293 #ifdef REF_PRINT
1294         REF_PRINT("SSL_CTX",a);
1295 #endif
1296         if (i > 0) return;
1297 #ifdef REF_CHECK
1298         if (i < 0)
1299                 {
1300                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1301                 abort(); /* ok */
1302                 }
1303 #endif
1304         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1305
1306         if (a->sessions != NULL)
1307                 {
1308                 SSL_CTX_flush_sessions(a,0);
1309                 lh_free(a->sessions);
1310                 }
1311         if (a->cert_store != NULL)
1312                 X509_STORE_free(a->cert_store);
1313         if (a->cipher_list != NULL)
1314                 sk_SSL_CIPHER_free(a->cipher_list);
1315         if (a->cipher_list_by_id != NULL)
1316                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1317         if (a->cert != NULL)
1318                 ssl_cert_free(a->cert);
1319         if (a->client_CA != NULL)
1320                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1321         if (a->extra_certs != NULL)
1322                 sk_X509_pop_free(a->extra_certs,X509_free);
1323 #if 0 /* This should never be done, since it removes a global database */
1324         if (a->comp_methods != NULL)
1325                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1326 #else
1327         a->comp_methods = NULL;
1328 #endif
1329         OPENSSL_free(a);
1330         }
1331
1332 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1333         {
1334         ctx->default_passwd_callback=cb;
1335         }
1336
1337 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1338         {
1339         ctx->default_passwd_callback_userdata=u;
1340         }
1341
1342 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1343         {
1344         /* now
1345          *     int (*cb)(X509_STORE_CTX *),
1346          * but should be
1347          *     int (*cb)(X509_STORE_CTX *, void *arg)
1348          */
1349         ctx->app_verify_callback=cb;
1350         ctx->app_verify_arg=arg; /* never used */
1351         }
1352
1353 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1354         {
1355         ctx->verify_mode=mode;
1356         ctx->default_verify_callback=cb;
1357         /* This needs cleaning up EAY EAY EAY */
1358         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1359         }
1360
1361 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1362         {
1363         ctx->verify_depth=depth;
1364         }
1365
1366 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1367         {
1368         CERT_PKEY *cpk;
1369         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1370         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1371         int rsa_tmp_export,dh_tmp_export,kl;
1372         unsigned long mask,emask;
1373
1374         if (c == NULL) return;
1375
1376         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1377
1378 #ifndef OPENSSL_NO_RSA
1379         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1380         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1381                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1382 #else
1383         rsa_tmp=rsa_tmp_export=0;
1384 #endif
1385 #ifndef OPENSSL_NO_DH
1386         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1387         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1388                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1389 #else
1390         dh_tmp=dh_tmp_export=0;
1391 #endif
1392
1393         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1394         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1395         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1396         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1397         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1398         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1399         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1400         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1401         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1402         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1403         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1404 /* FIX THIS EAY EAY EAY */
1405         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1406         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1407
1408         mask=0;
1409         emask=0;
1410
1411 #ifdef CIPHER_DEBUG
1412         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1413                 rsa_tmp,rsa_tmp_export,dh_tmp,
1414                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1415 #endif
1416
1417         if (rsa_enc || (rsa_tmp && rsa_sign))
1418                 mask|=SSL_kRSA;
1419         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1420                 emask|=SSL_kRSA;
1421
1422 #if 0
1423         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1424         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1425                 (rsa_enc || rsa_sign || dsa_sign))
1426                 mask|=SSL_kEDH;
1427         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1428                 (rsa_enc || rsa_sign || dsa_sign))
1429                 emask|=SSL_kEDH;
1430 #endif
1431
1432         if (dh_tmp_export) 
1433                 emask|=SSL_kEDH;
1434
1435         if (dh_tmp)
1436                 mask|=SSL_kEDH;
1437
1438         if (dh_rsa) mask|=SSL_kDHr;
1439         if (dh_rsa_export) emask|=SSL_kDHr;
1440
1441         if (dh_dsa) mask|=SSL_kDHd;
1442         if (dh_dsa_export) emask|=SSL_kDHd;
1443
1444         if (rsa_enc || rsa_sign)
1445                 {
1446                 mask|=SSL_aRSA;
1447                 emask|=SSL_aRSA;
1448                 }
1449
1450         if (dsa_sign)
1451                 {
1452                 mask|=SSL_aDSS;
1453                 emask|=SSL_aDSS;
1454                 }
1455
1456         mask|=SSL_aNULL;
1457         emask|=SSL_aNULL;
1458
1459 #ifndef OPENSSL_NO_KRB5
1460         mask|=SSL_kKRB5|SSL_aKRB5;
1461         emask|=SSL_kKRB5|SSL_aKRB5;
1462 #endif
1463
1464         c->mask=mask;
1465         c->export_mask=emask;
1466         c->valid=1;
1467         }
1468
1469 /* THIS NEEDS CLEANING UP */
1470 X509 *ssl_get_server_send_cert(SSL *s)
1471         {
1472         unsigned long alg,mask,kalg;
1473         CERT *c;
1474         int i,is_export;
1475
1476         c=s->cert;
1477         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1478         alg=s->s3->tmp.new_cipher->algorithms;
1479         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1480         mask=is_export?c->export_mask:c->mask;
1481         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1482
1483         if      (kalg & SSL_kDHr)
1484                 i=SSL_PKEY_DH_RSA;
1485         else if (kalg & SSL_kDHd)
1486                 i=SSL_PKEY_DH_DSA;
1487         else if (kalg & SSL_aDSS)
1488                 i=SSL_PKEY_DSA_SIGN;
1489         else if (kalg & SSL_aRSA)
1490                 {
1491                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1492                         i=SSL_PKEY_RSA_SIGN;
1493                 else
1494                         i=SSL_PKEY_RSA_ENC;
1495                 }
1496         else if (kalg & SSL_aKRB5)
1497                 {
1498                 /* VRS something else here? */
1499                 return(NULL);
1500                 }
1501         else /* if (kalg & SSL_aNULL) */
1502                 {
1503                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
1504                 return(NULL);
1505                 }
1506         if (c->pkeys[i].x509 == NULL) return(NULL);
1507         return(c->pkeys[i].x509);
1508         }
1509
1510 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1511         {
1512         unsigned long alg;
1513         CERT *c;
1514
1515         alg=cipher->algorithms;
1516         c=s->cert;
1517
1518         if ((alg & SSL_aDSS) &&
1519                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1520                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1521         else if (alg & SSL_aRSA)
1522                 {
1523                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1524                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1525                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1526                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1527                 else
1528                         return(NULL);
1529                 }
1530         else /* if (alg & SSL_aNULL) */
1531                 {
1532                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
1533                 return(NULL);
1534                 }
1535         }
1536
1537 void ssl_update_cache(SSL *s,int mode)
1538         {
1539         int i;
1540
1541         /* If the session_id_length is 0, we are not supposed to cache it,
1542          * and it would be rather hard to do anyway :-) */
1543         if (s->session->session_id_length == 0) return;
1544
1545         if ((s->ctx->session_cache_mode & mode)
1546                 && (!s->hit)
1547                 && SSL_CTX_add_session(s->ctx,s->session)
1548                 && (s->ctx->new_session_cb != NULL))
1549                 {
1550                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1551                 if (!s->ctx->new_session_cb(s,s->session))
1552                         SSL_SESSION_free(s->session);
1553                 }
1554
1555         /* auto flush every 255 connections */
1556         i=s->ctx->session_cache_mode;
1557         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1558                 ((i & mode) == mode))
1559                 {
1560                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1561                         ?s->ctx->stats.sess_connect_good
1562                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1563                         {
1564                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1565                         }
1566                 }
1567         }
1568
1569 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1570         {
1571         return(s->method);
1572         }
1573
1574 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1575         {
1576         int conn= -1;
1577         int ret=1;
1578
1579         if (s->method != meth)
1580                 {
1581                 if (s->handshake_func != NULL)
1582                         conn=(s->handshake_func == s->method->ssl_connect);
1583
1584                 if (s->method->version == meth->version)
1585                         s->method=meth;
1586                 else
1587                         {
1588                         s->method->ssl_free(s);
1589                         s->method=meth;
1590                         ret=s->method->ssl_new(s);
1591                         }
1592
1593                 if (conn == 1)
1594                         s->handshake_func=meth->ssl_connect;
1595                 else if (conn == 0)
1596                         s->handshake_func=meth->ssl_accept;
1597                 }
1598         return(ret);
1599         }
1600
1601 int SSL_get_error(SSL *s,int i)
1602         {
1603         int reason;
1604         unsigned long l;
1605         BIO *bio;
1606
1607         if (i > 0) return(SSL_ERROR_NONE);
1608
1609         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1610          * etc, where we do encode the error */
1611         if ((l=ERR_peek_error()) != 0)
1612                 {
1613                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1614                         return(SSL_ERROR_SYSCALL);
1615                 else
1616                         return(SSL_ERROR_SSL);
1617                 }
1618
1619         if ((i < 0) && SSL_want_read(s))
1620                 {
1621                 bio=SSL_get_rbio(s);
1622                 if (BIO_should_read(bio))
1623                         return(SSL_ERROR_WANT_READ);
1624                 else if (BIO_should_write(bio))
1625                         /* This one doesn't make too much sense ... We never try
1626                          * to write to the rbio, and an application program where
1627                          * rbio and wbio are separate couldn't even know what it
1628                          * should wait for.
1629                          * However if we ever set s->rwstate incorrectly
1630                          * (so that we have SSL_want_read(s) instead of
1631                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1632                          * this test works around that bug; so it might be safer
1633                          * to keep it. */
1634                         return(SSL_ERROR_WANT_WRITE);
1635                 else if (BIO_should_io_special(bio))
1636                         {
1637                         reason=BIO_get_retry_reason(bio);
1638                         if (reason == BIO_RR_CONNECT)
1639                                 return(SSL_ERROR_WANT_CONNECT);
1640                         else if (reason == BIO_RR_ACCEPT)
1641                                 return(SSL_ERROR_WANT_ACCEPT);
1642                         else
1643                                 return(SSL_ERROR_SYSCALL); /* unknown */
1644                         }
1645                 }
1646
1647         if ((i < 0) && SSL_want_write(s))
1648                 {
1649                 bio=SSL_get_wbio(s);
1650                 if (BIO_should_write(bio))
1651                         return(SSL_ERROR_WANT_WRITE);
1652                 else if (BIO_should_read(bio))
1653                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1654                         return(SSL_ERROR_WANT_READ);
1655                 else if (BIO_should_io_special(bio))
1656                         {
1657                         reason=BIO_get_retry_reason(bio);
1658                         if (reason == BIO_RR_CONNECT)
1659                                 return(SSL_ERROR_WANT_CONNECT);
1660                         else if (reason == BIO_RR_ACCEPT)
1661                                 return(SSL_ERROR_WANT_ACCEPT);
1662                         else
1663                                 return(SSL_ERROR_SYSCALL);
1664                         }
1665                 }
1666         if ((i < 0) && SSL_want_x509_lookup(s))
1667                 {
1668                 return(SSL_ERROR_WANT_X509_LOOKUP);
1669                 }
1670
1671         if (i == 0)
1672                 {
1673                 if (s->version == SSL2_VERSION)
1674                         {
1675                         /* assume it is the socket being closed */
1676                         return(SSL_ERROR_ZERO_RETURN);
1677                         }
1678                 else
1679                         {
1680                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1681                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1682                                 return(SSL_ERROR_ZERO_RETURN);
1683                         }
1684                 }
1685         return(SSL_ERROR_SYSCALL);
1686         }
1687
1688 int SSL_do_handshake(SSL *s)
1689         {
1690         int ret=1;
1691
1692         if (s->handshake_func == NULL)
1693                 {
1694                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1695                 return(-1);
1696                 }
1697
1698         s->method->ssl_renegotiate_check(s);
1699
1700         if (SSL_in_init(s) || SSL_in_before(s))
1701                 {
1702                 ret=s->handshake_func(s);
1703                 }
1704         return(ret);
1705         }
1706
1707 /* For the next 2 functions, SSL_clear() sets shutdown and so
1708  * one of these calls will reset it */
1709 void SSL_set_accept_state(SSL *s)
1710         {
1711         s->server=1;
1712         s->shutdown=0;
1713         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1714         s->handshake_func=s->method->ssl_accept;
1715         /* clear the current cipher */
1716         ssl_clear_cipher_ctx(s);
1717         }
1718
1719 void SSL_set_connect_state(SSL *s)
1720         {
1721         s->server=0;
1722         s->shutdown=0;
1723         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1724         s->handshake_func=s->method->ssl_connect;
1725         /* clear the current cipher */
1726         ssl_clear_cipher_ctx(s);
1727         }
1728
1729 int ssl_undefined_function(SSL *s)
1730         {
1731         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1732         return(0);
1733         }
1734
1735 SSL_METHOD *ssl_bad_method(int ver)
1736         {
1737         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1738         return(NULL);
1739         }
1740
1741 const char *SSL_get_version(SSL *s)
1742         {
1743         if (s->version == TLS1_VERSION)
1744                 return("TLSv1");
1745         else if (s->version == SSL3_VERSION)
1746                 return("SSLv3");
1747         else if (s->version == SSL2_VERSION)
1748                 return("SSLv2");
1749         else
1750                 return("unknown");
1751         }
1752
1753 SSL *SSL_dup(SSL *s)
1754         {
1755         STACK_OF(X509_NAME) *sk;
1756         X509_NAME *xn;
1757         SSL *ret;
1758         int i;
1759                  
1760         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1761             return(NULL);
1762                           
1763         if (s->session != NULL)
1764                 {
1765                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1766                 SSL_copy_session_id(ret,s);
1767                 }
1768         else
1769                 {
1770                 /* No session has been established yet, so we have to expect
1771                  * that s->cert or ret->cert will be changed later --
1772                  * they should not both point to the same object,
1773                  * and thus we can't use SSL_copy_session_id. */
1774
1775                 ret->method = s->method;
1776                 ret->method->ssl_new(ret);
1777
1778                 if (s->cert != NULL)
1779                         {
1780                         if (ret->cert != NULL)
1781                                 {
1782                                 ssl_cert_free(ret->cert);
1783                                 }
1784                         ret->cert = ssl_cert_dup(s->cert);
1785                         if (ret->cert == NULL)
1786                                 goto err;
1787                         }
1788                                 
1789                 SSL_set_session_id_context(ret,
1790                         s->sid_ctx, s->sid_ctx_length);
1791                 }
1792
1793         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1794         SSL_set_verify(ret,SSL_get_verify_mode(s),
1795                 SSL_get_verify_callback(s));
1796         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1797
1798         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1799         
1800         ret->debug=s->debug;
1801         ret->options=s->options;
1802
1803         /* copy app data, a little dangerous perhaps */
1804         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1805                 goto err;
1806
1807         /* setup rbio, and wbio */
1808         if (s->rbio != NULL)
1809                 {
1810                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1811                         goto err;
1812                 }
1813         if (s->wbio != NULL)
1814                 {
1815                 if (s->wbio != s->rbio)
1816                         {
1817                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1818                                 goto err;
1819                         }
1820                 else
1821                         ret->wbio=ret->rbio;
1822                 }
1823
1824         /* dup the cipher_list and cipher_list_by_id stacks */
1825         if (s->cipher_list != NULL)
1826                 {
1827                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1828                         goto err;
1829                 }
1830         if (s->cipher_list_by_id != NULL)
1831                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1832                         == NULL)
1833                         goto err;
1834
1835         /* Dup the client_CA list */
1836         if (s->client_CA != NULL)
1837                 {
1838                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1839                 ret->client_CA=sk;
1840                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1841                         {
1842                         xn=sk_X509_NAME_value(sk,i);
1843                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1844                                 {
1845                                 X509_NAME_free(xn);
1846                                 goto err;
1847                                 }
1848                         }
1849                 }
1850
1851         ret->shutdown=s->shutdown;
1852         ret->state=s->state;
1853         ret->handshake_func=s->handshake_func;
1854         ret->server=s->server;
1855
1856         if (0)
1857                 {
1858 err:
1859                 if (ret != NULL) SSL_free(ret);
1860                 ret=NULL;
1861                 }
1862         return(ret);
1863         }
1864
1865 void ssl_clear_cipher_ctx(SSL *s)
1866         {
1867         if (s->enc_read_ctx != NULL)
1868                 {
1869                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1870                 OPENSSL_free(s->enc_read_ctx);
1871                 s->enc_read_ctx=NULL;
1872                 }
1873         if (s->enc_write_ctx != NULL)
1874                 {
1875                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1876                 OPENSSL_free(s->enc_write_ctx);
1877                 s->enc_write_ctx=NULL;
1878                 }
1879         if (s->expand != NULL)
1880                 {
1881                 COMP_CTX_free(s->expand);
1882                 s->expand=NULL;
1883                 }
1884         if (s->compress != NULL)
1885                 {
1886                 COMP_CTX_free(s->compress);
1887                 s->compress=NULL;
1888                 }
1889         }
1890
1891 /* Fix this function so that it takes an optional type parameter */
1892 X509 *SSL_get_certificate(SSL *s)
1893         {
1894         if (s->cert != NULL)
1895                 return(s->cert->key->x509);
1896         else
1897                 return(NULL);
1898         }
1899
1900 /* Fix this function so that it takes an optional type parameter */
1901 EVP_PKEY *SSL_get_privatekey(SSL *s)
1902         {
1903         if (s->cert != NULL)
1904                 return(s->cert->key->privatekey);
1905         else
1906                 return(NULL);
1907         }
1908
1909 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1910         {
1911         if ((s->session != NULL) && (s->session->cipher != NULL))
1912                 return(s->session->cipher);
1913         return(NULL);
1914         }
1915
1916 int ssl_init_wbio_buffer(SSL *s,int push)
1917         {
1918         BIO *bbio;
1919
1920         if (s->bbio == NULL)
1921                 {
1922                 bbio=BIO_new(BIO_f_buffer());
1923                 if (bbio == NULL) return(0);
1924                 s->bbio=bbio;
1925                 }
1926         else
1927                 {
1928                 bbio=s->bbio;
1929                 if (s->bbio == s->wbio)
1930                         s->wbio=BIO_pop(s->wbio);
1931                 }
1932         (void)BIO_reset(bbio);
1933 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1934         if (!BIO_set_read_buffer_size(bbio,1))
1935                 {
1936                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1937                 return(0);
1938                 }
1939         if (push)
1940                 {
1941                 if (s->wbio != bbio)
1942                         s->wbio=BIO_push(bbio,s->wbio);
1943                 }
1944         else
1945                 {
1946                 if (s->wbio == bbio)
1947                         s->wbio=BIO_pop(bbio);
1948                 }
1949         return(1);
1950         }
1951
1952 void ssl_free_wbio_buffer(SSL *s)
1953         {
1954         if (s->bbio == NULL) return;
1955
1956         if (s->bbio == s->wbio)
1957                 {
1958                 /* remove buffering */
1959                 s->wbio=BIO_pop(s->wbio);
1960 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
1961                 assert(s->wbio != NULL);
1962 #endif  
1963         }
1964         BIO_free(s->bbio);
1965         s->bbio=NULL;
1966         }
1967         
1968 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1969         {
1970         ctx->quiet_shutdown=mode;
1971         }
1972
1973 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1974         {
1975         return(ctx->quiet_shutdown);
1976         }
1977
1978 void SSL_set_quiet_shutdown(SSL *s,int mode)
1979         {
1980         s->quiet_shutdown=mode;
1981         }
1982
1983 int SSL_get_quiet_shutdown(SSL *s)
1984         {
1985         return(s->quiet_shutdown);
1986         }
1987
1988 void SSL_set_shutdown(SSL *s,int mode)
1989         {
1990         s->shutdown=mode;
1991         }
1992
1993 int SSL_get_shutdown(SSL *s)
1994         {
1995         return(s->shutdown);
1996         }
1997
1998 int SSL_version(SSL *s)
1999         {
2000         return(s->version);
2001         }
2002
2003 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
2004         {
2005         return(ssl->ctx);
2006         }
2007
2008 #ifndef OPENSSL_NO_STDIO
2009 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2010         {
2011         return(X509_STORE_set_default_paths(ctx->cert_store));
2012         }
2013
2014 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2015                 const char *CApath)
2016         {
2017         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2018         }
2019 #endif
2020
2021 void SSL_set_info_callback(SSL *ssl,void (*cb)())
2022         {
2023         ssl->info_callback=cb;
2024         }
2025
2026 void (*SSL_get_info_callback(SSL *ssl))(void)
2027         {
2028         return((void (*)())ssl->info_callback);
2029         }
2030
2031 int SSL_state(SSL *ssl)
2032         {
2033         return(ssl->state);
2034         }
2035
2036 void SSL_set_verify_result(SSL *ssl,long arg)
2037         {
2038         ssl->verify_result=arg;
2039         }
2040
2041 long SSL_get_verify_result(SSL *ssl)
2042         {
2043         return(ssl->verify_result);
2044         }
2045
2046 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2047                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2048         {
2049         ssl_meth_num++;
2050         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
2051                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
2052         }
2053
2054 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2055         {
2056         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2057         }
2058
2059 void *SSL_get_ex_data(SSL *s,int idx)
2060         {
2061         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2062         }
2063
2064 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2065                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2066         {
2067         ssl_ctx_meth_num++;
2068         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
2069                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
2070         }
2071
2072 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2073         {
2074         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2075         }
2076
2077 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
2078         {
2079         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2080         }
2081
2082 int ssl_ok(SSL *s)
2083         {
2084         return(1);
2085         }
2086
2087 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
2088         {
2089         return(ctx->cert_store);
2090         }
2091
2092 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2093         {
2094         if (ctx->cert_store != NULL)
2095                 X509_STORE_free(ctx->cert_store);
2096         ctx->cert_store=store;
2097         }
2098
2099 int SSL_want(SSL *s)
2100         {
2101         return(s->rwstate);
2102         }
2103
2104 /*!
2105  * \brief Set the callback for generating temporary RSA keys.
2106  * \param ctx the SSL context.
2107  * \param cb the callback
2108  */
2109
2110 #ifndef OPENSSL_NO_RSA
2111 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2112                                                           int is_export,
2113                                                           int keylength))
2114     {
2115     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2116     }
2117
2118 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2119                                                   int is_export,
2120                                                   int keylength))
2121     {
2122     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2123     }
2124 #endif
2125
2126 #ifdef DOXYGEN
2127 /*!
2128  * \brief The RSA temporary key callback function.
2129  * \param ssl the SSL session.
2130  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2131  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2132  * of the required key in bits.
2133  * \return the temporary RSA key.
2134  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2135  */
2136
2137 RSA *cb(SSL *ssl,int is_export,int keylength)
2138     {}
2139 #endif
2140
2141 /*!
2142  * \brief Set the callback for generating temporary DH keys.
2143  * \param ctx the SSL context.
2144  * \param dh the callback
2145  */
2146
2147 #ifndef OPENSSL_NO_DH
2148 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2149                                                         int keylength))
2150     {
2151     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2152     }
2153
2154 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2155                                                 int keylength))
2156     {
2157     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2158     }
2159 #endif
2160
2161 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2162 #include "../crypto/bio/bss_file.c"
2163 #endif
2164
2165 IMPLEMENT_STACK_OF(SSL_CIPHER)
2166 IMPLEMENT_STACK_OF(SSL_COMP)