New X509_VERIFY_PARAM structure and associated functionality.
[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  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
62  *
63  * Redistribution and use in source and binary forms, with or without
64  * modification, are permitted provided that the following conditions
65  * are met:
66  *
67  * 1. Redistributions of source code must retain the above copyright
68  *    notice, this list of conditions and the following disclaimer. 
69  *
70  * 2. Redistributions in binary form must reproduce the above copyright
71  *    notice, this list of conditions and the following disclaimer in
72  *    the documentation and/or other materials provided with the
73  *    distribution.
74  *
75  * 3. All advertising materials mentioning features or use of this
76  *    software must display the following acknowledgment:
77  *    "This product includes software developed by the OpenSSL Project
78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
79  *
80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81  *    endorse or promote products derived from this software without
82  *    prior written permission. For written permission, please contact
83  *    openssl-core@openssl.org.
84  *
85  * 5. Products derived from this software may not be called "OpenSSL"
86  *    nor may "OpenSSL" appear in their names without prior written
87  *    permission of the OpenSSL Project.
88  *
89  * 6. Redistributions of any form whatsoever must retain the following
90  *    acknowledgment:
91  *    "This product includes software developed by the OpenSSL Project
92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
93  *
94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105  * OF THE POSSIBILITY OF SUCH DAMAGE.
106  * ====================================================================
107  *
108  * This product includes cryptographic software written by Eric Young
109  * (eay@cryptsoft.com).  This product includes software written by Tim
110  * Hudson (tjh@cryptsoft.com).
111  *
112  */
113 /* ====================================================================
114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115  * ECC cipher suite support in OpenSSL originally developed by 
116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117  */
118
119 #ifdef REF_CHECK
120 #  include <assert.h>
121 #endif
122 #include <stdio.h>
123 #include "ssl_locl.h"
124 #include "kssl_lcl.h"
125 #include <openssl/objects.h>
126 #include <openssl/lhash.h>
127 #include <openssl/x509v3.h>
128 #include <openssl/dh.h>
129
130 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
131
132 OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
133         /* evil casts, but these functions are only called if there's a library bug */
134         (int (*)(SSL *,int))ssl_undefined_function,
135         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
136         ssl_undefined_function,
137         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
138         (int (*)(SSL*, int))ssl_undefined_function,
139         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function
140         };
141
142 int SSL_clear(SSL *s)
143         {
144
145         if (s->method == NULL)
146                 {
147                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
148                 return(0);
149                 }
150
151         if (ssl_clear_bad_session(s))
152                 {
153                 SSL_SESSION_free(s->session);
154                 s->session=NULL;
155                 }
156
157         s->error=0;
158         s->hit=0;
159         s->shutdown=0;
160
161 #if 0 /* Disabled since version 1.10 of this file (early return not
162        * needed because SSL_clear is not called when doing renegotiation) */
163         /* This is set if we are doing dynamic renegotiation so keep
164          * the old cipher.  It is sort of a SSL_clear_lite :-) */
165         if (s->new_session) return(1);
166 #else
167         if (s->new_session)
168                 {
169                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
170                 return 0;
171                 }
172 #endif
173
174         s->type=0;
175
176         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
177
178         s->version=s->method->version;
179         s->client_version=s->version;
180         s->rwstate=SSL_NOTHING;
181         s->rstate=SSL_ST_READ_HEADER;
182 #if 0
183         s->read_ahead=s->ctx->read_ahead;
184 #endif
185
186         if (s->init_buf != NULL)
187                 {
188                 BUF_MEM_free(s->init_buf);
189                 s->init_buf=NULL;
190                 }
191
192         ssl_clear_cipher_ctx(s);
193
194         s->first_packet=0;
195
196 #if 1
197         /* Check to see if we were changed into a different method, if
198          * so, revert back if we are not doing session-id reuse. */
199         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
200                 {
201                 s->method->ssl_free(s);
202                 s->method=s->ctx->method;
203                 if (!s->method->ssl_new(s))
204                         return(0);
205                 }
206         else
207 #endif
208                 s->method->ssl_clear(s);
209         return(1);
210         }
211
212 /** Used to change an SSL_CTXs default SSL method type */
213 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
214         {
215         STACK_OF(SSL_CIPHER) *sk;
216
217         ctx->method=meth;
218
219         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
220                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
221         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
222                 {
223                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
224                 return(0);
225                 }
226         return(1);
227         }
228
229 SSL *SSL_new(SSL_CTX *ctx)
230         {
231         SSL *s;
232
233         if (ctx == NULL)
234                 {
235                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
236                 return(NULL);
237                 }
238         if (ctx->method == NULL)
239                 {
240                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
241                 return(NULL);
242                 }
243
244         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
245         if (s == NULL) goto err;
246         memset(s,0,sizeof(SSL));
247
248 #ifndef OPENSSL_NO_KRB5
249         s->kssl_ctx = kssl_ctx_new();
250 #endif  /* OPENSSL_NO_KRB5 */
251
252         s->options=ctx->options;
253         s->mode=ctx->mode;
254         s->max_cert_list=ctx->max_cert_list;
255
256         if (ctx->cert != NULL)
257                 {
258                 /* Earlier library versions used to copy the pointer to
259                  * the CERT, not its contents; only when setting new
260                  * parameters for the per-SSL copy, ssl_cert_new would be
261                  * called (and the direct reference to the per-SSL_CTX
262                  * settings would be lost, but those still were indirectly
263                  * accessed for various purposes, and for that reason they
264                  * used to be known as s->ctx->default_cert).
265                  * Now we don't look at the SSL_CTX's CERT after having
266                  * duplicated it once. */
267
268                 s->cert = ssl_cert_dup(ctx->cert);
269                 if (s->cert == NULL)
270                         goto err;
271                 }
272         else
273                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
274
275         s->read_ahead=ctx->read_ahead;
276         s->msg_callback=ctx->msg_callback;
277         s->msg_callback_arg=ctx->msg_callback_arg;
278         s->verify_mode=ctx->verify_mode;
279 #if 0
280         s->verify_depth=ctx->verify_depth;
281 #endif
282         s->sid_ctx_length=ctx->sid_ctx_length;
283         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
284         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
285         s->verify_callback=ctx->default_verify_callback;
286         s->generate_session_id=ctx->generate_session_id;
287
288         s->param = X509_VERIFY_PARAM_new();
289         if (!s->param)
290                 goto err;
291         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
292 #if 0
293         s->purpose = ctx->purpose;
294         s->trust = ctx->trust;
295 #endif
296         s->quiet_shutdown=ctx->quiet_shutdown;
297
298         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
299         s->ctx=ctx;
300
301         s->verify_result=X509_V_OK;
302
303         s->method=ctx->method;
304
305         if (!s->method->ssl_new(s))
306                 goto err;
307
308         s->references=1;
309         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
310
311         SSL_clear(s);
312
313         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
314
315         return(s);
316 err:
317         if (s != NULL)
318                 {
319                 if (s->cert != NULL)
320                         ssl_cert_free(s->cert);
321                 if (s->ctx != NULL)
322                         SSL_CTX_free(s->ctx); /* decrement reference count */
323                 OPENSSL_free(s);
324                 }
325         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
326         return(NULL);
327         }
328
329 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
330                                    unsigned int sid_ctx_len)
331     {
332     if(sid_ctx_len > sizeof ctx->sid_ctx)
333         {
334         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
335         return 0;
336         }
337     ctx->sid_ctx_length=sid_ctx_len;
338     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
339
340     return 1;
341     }
342
343 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
344                                unsigned int sid_ctx_len)
345     {
346     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
347         {
348         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
349         return 0;
350         }
351     ssl->sid_ctx_length=sid_ctx_len;
352     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
353
354     return 1;
355     }
356
357 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
358         {
359         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
360         ctx->generate_session_id = cb;
361         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
362         return 1;
363         }
364
365 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
366         {
367         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
368         ssl->generate_session_id = cb;
369         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
370         return 1;
371         }
372
373 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
374                                 unsigned int id_len)
375         {
376         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
377          * we can "construct" a session to give us the desired check - ie. to
378          * find if there's a session in the hash table that would conflict with
379          * any new session built out of this id/id_len and the ssl_version in
380          * use by this SSL. */
381         SSL_SESSION r, *p;
382
383         if(id_len > sizeof r.session_id)
384                 return 0;
385
386         r.ssl_version = ssl->version;
387         r.session_id_length = id_len;
388         memcpy(r.session_id, id, id_len);
389         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
390          * callback is calling us to check the uniqueness of a shorter ID, it
391          * must be compared as a padded-out ID because that is what it will be
392          * converted to when the callback has finished choosing it. */
393         if((r.ssl_version == SSL2_VERSION) &&
394                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
395                 {
396                 memset(r.session_id + id_len, 0,
397                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
398                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
399                 }
400
401         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
402         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
403         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
404         return (p != NULL);
405         }
406
407 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
408         {
409         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
410         }
411
412 int SSL_set_purpose(SSL *s, int purpose)
413         {
414         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
415         }
416
417 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
418         {
419         return X509_VERIFY_PARAM_set_trust(s->param, trust);
420         }
421
422 int SSL_set_trust(SSL *s, int trust)
423         {
424         return X509_VERIFY_PARAM_set_trust(s->param, trust);
425         }
426
427 void SSL_free(SSL *s)
428         {
429         int i;
430
431         if(s == NULL)
432             return;
433
434         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
435 #ifdef REF_PRINT
436         REF_PRINT("SSL",s);
437 #endif
438         if (i > 0) return;
439 #ifdef REF_CHECK
440         if (i < 0)
441                 {
442                 fprintf(stderr,"SSL_free, bad reference count\n");
443                 abort(); /* ok */
444                 }
445 #endif
446
447         if (s->param)
448                 X509_VERIFY_PARAM_free(s->param);
449
450         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
451
452         if (s->bbio != NULL)
453                 {
454                 /* If the buffering BIO is in place, pop it off */
455                 if (s->bbio == s->wbio)
456                         {
457                         s->wbio=BIO_pop(s->wbio);
458                         }
459                 BIO_free(s->bbio);
460                 s->bbio=NULL;
461                 }
462         if (s->rbio != NULL)
463                 BIO_free_all(s->rbio);
464         if ((s->wbio != NULL) && (s->wbio != s->rbio))
465                 BIO_free_all(s->wbio);
466
467         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
468
469         /* add extra stuff */
470         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
471         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
472
473         /* Make the next call work :-) */
474         if (s->session != NULL)
475                 {
476                 ssl_clear_bad_session(s);
477                 SSL_SESSION_free(s->session);
478                 }
479
480         ssl_clear_cipher_ctx(s);
481
482         if (s->cert != NULL) ssl_cert_free(s->cert);
483         /* Free up if allocated */
484
485         if (s->ctx) SSL_CTX_free(s->ctx);
486
487         if (s->client_CA != NULL)
488                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
489
490         if (s->method != NULL) s->method->ssl_free(s);
491
492 #ifndef OPENSSL_NO_KRB5
493         if (s->kssl_ctx != NULL)
494                 kssl_ctx_free(s->kssl_ctx);
495 #endif  /* OPENSSL_NO_KRB5 */
496
497         OPENSSL_free(s);
498         }
499
500 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
501         {
502         /* If the output buffering BIO is still in place, remove it
503          */
504         if (s->bbio != NULL)
505                 {
506                 if (s->wbio == s->bbio)
507                         {
508                         s->wbio=s->wbio->next_bio;
509                         s->bbio->next_bio=NULL;
510                         }
511                 }
512         if ((s->rbio != NULL) && (s->rbio != rbio))
513                 BIO_free_all(s->rbio);
514         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
515                 BIO_free_all(s->wbio);
516         s->rbio=rbio;
517         s->wbio=wbio;
518         }
519
520 BIO *SSL_get_rbio(SSL *s)
521         { return(s->rbio); }
522
523 BIO *SSL_get_wbio(SSL *s)
524         { return(s->wbio); }
525
526 int SSL_get_fd(SSL *s)
527         {
528         return(SSL_get_rfd(s));
529         }
530
531 int SSL_get_rfd(SSL *s)
532         {
533         int ret= -1;
534         BIO *b,*r;
535
536         b=SSL_get_rbio(s);
537         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
538         if (r != NULL)
539                 BIO_get_fd(r,&ret);
540         return(ret);
541         }
542
543 int SSL_get_wfd(SSL *s)
544         {
545         int ret= -1;
546         BIO *b,*r;
547
548         b=SSL_get_wbio(s);
549         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
550         if (r != NULL)
551                 BIO_get_fd(r,&ret);
552         return(ret);
553         }
554
555 #ifndef OPENSSL_NO_SOCK
556 int SSL_set_fd(SSL *s,int fd)
557         {
558         int ret=0;
559         BIO *bio=NULL;
560
561         bio=BIO_new(BIO_s_socket());
562
563         if (bio == NULL)
564                 {
565                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
566                 goto err;
567                 }
568         BIO_set_fd(bio,fd,BIO_NOCLOSE);
569         SSL_set_bio(s,bio,bio);
570         ret=1;
571 err:
572         return(ret);
573         }
574
575 int SSL_set_wfd(SSL *s,int fd)
576         {
577         int ret=0;
578         BIO *bio=NULL;
579
580         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
581                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
582                 {
583                 bio=BIO_new(BIO_s_socket());
584
585                 if (bio == NULL)
586                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
587                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
588                 SSL_set_bio(s,SSL_get_rbio(s),bio);
589                 }
590         else
591                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
592         ret=1;
593 err:
594         return(ret);
595         }
596
597 int SSL_set_rfd(SSL *s,int fd)
598         {
599         int ret=0;
600         BIO *bio=NULL;
601
602         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
603                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
604                 {
605                 bio=BIO_new(BIO_s_socket());
606
607                 if (bio == NULL)
608                         {
609                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
610                         goto err;
611                         }
612                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
613                 SSL_set_bio(s,bio,SSL_get_wbio(s));
614                 }
615         else
616                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
617         ret=1;
618 err:
619         return(ret);
620         }
621 #endif
622
623
624 /* return length of latest Finished message we sent, copy to 'buf' */
625 size_t SSL_get_finished(SSL *s, void *buf, size_t count)
626         {
627         size_t ret = 0;
628         
629         if (s->s3 != NULL)
630                 {
631                 ret = s->s3->tmp.finish_md_len;
632                 if (count > ret)
633                         count = ret;
634                 memcpy(buf, s->s3->tmp.finish_md, count);
635                 }
636         return ret;
637         }
638
639 /* return length of latest Finished message we expected, copy to 'buf' */
640 size_t SSL_get_peer_finished(SSL *s, void *buf, size_t count)
641         {
642         size_t ret = 0;
643         
644         if (s->s3 != NULL)
645                 {
646                 ret = s->s3->tmp.peer_finish_md_len;
647                 if (count > ret)
648                         count = ret;
649                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
650                 }
651         return ret;
652         }
653
654
655 int SSL_get_verify_mode(SSL *s)
656         {
657         return(s->verify_mode);
658         }
659
660 int SSL_get_verify_depth(SSL *s)
661         {
662         return X509_VERIFY_PARAM_get_depth(s->param);
663         }
664
665 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
666         {
667         return(s->verify_callback);
668         }
669
670 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
671         {
672         return(ctx->verify_mode);
673         }
674
675 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
676         {
677         return X509_VERIFY_PARAM_get_depth(ctx->param);
678         }
679
680 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
681         {
682         return(ctx->default_verify_callback);
683         }
684
685 void SSL_set_verify(SSL *s,int mode,
686                     int (*callback)(int ok,X509_STORE_CTX *ctx))
687         {
688         s->verify_mode=mode;
689         if (callback != NULL)
690                 s->verify_callback=callback;
691         }
692
693 void SSL_set_verify_depth(SSL *s,int depth)
694         {
695         X509_VERIFY_PARAM_set_depth(s->param, depth);
696         }
697
698 void SSL_set_read_ahead(SSL *s,int yes)
699         {
700         s->read_ahead=yes;
701         }
702
703 int SSL_get_read_ahead(SSL *s)
704         {
705         return(s->read_ahead);
706         }
707
708 int SSL_pending(SSL *s)
709         {
710         /* SSL_pending cannot work properly if read-ahead is enabled
711          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
712          * and it is impossible to fix since SSL_pending cannot report
713          * errors that may be observed while scanning the new data.
714          * (Note that SSL_pending() is often used as a boolean value,
715          * so we'd better not return -1.)
716          */
717         return(s->method->ssl_pending(s));
718         }
719
720 X509 *SSL_get_peer_certificate(SSL *s)
721         {
722         X509 *r;
723         
724         if ((s == NULL) || (s->session == NULL))
725                 r=NULL;
726         else
727                 r=s->session->peer;
728
729         if (r == NULL) return(r);
730
731         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
732
733         return(r);
734         }
735
736 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
737         {
738         STACK_OF(X509) *r;
739         
740         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
741                 r=NULL;
742         else
743                 r=s->session->sess_cert->cert_chain;
744
745         /* If we are a client, cert_chain includes the peer's own
746          * certificate; if we are a server, it does not. */
747         
748         return(r);
749         }
750
751 /* Now in theory, since the calling process own 't' it should be safe to
752  * modify.  We need to be able to read f without being hassled */
753 void SSL_copy_session_id(SSL *t,SSL *f)
754         {
755         CERT *tmp;
756
757         /* Do we need to to SSL locking? */
758         SSL_set_session(t,SSL_get_session(f));
759
760         /* what if we are setup as SSLv2 but want to talk SSLv3 or
761          * vice-versa */
762         if (t->method != f->method)
763                 {
764                 t->method->ssl_free(t); /* cleanup current */
765                 t->method=f->method;    /* change method */
766                 t->method->ssl_new(t);  /* setup new */
767                 }
768
769         tmp=t->cert;
770         if (f->cert != NULL)
771                 {
772                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
773                 t->cert=f->cert;
774                 }
775         else
776                 t->cert=NULL;
777         if (tmp != NULL) ssl_cert_free(tmp);
778         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
779         }
780
781 /* Fix this so it checks all the valid key/cert options */
782 int SSL_CTX_check_private_key(SSL_CTX *ctx)
783         {
784         if (    (ctx == NULL) ||
785                 (ctx->cert == NULL) ||
786                 (ctx->cert->key->x509 == NULL))
787                 {
788                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
789                 return(0);
790                 }
791         if      (ctx->cert->key->privatekey == NULL)
792                 {
793                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
794                 return(0);
795                 }
796         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
797         }
798
799 /* Fix this function so that it takes an optional type parameter */
800 int SSL_check_private_key(SSL *ssl)
801         {
802         if (ssl == NULL)
803                 {
804                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
805                 return(0);
806                 }
807         if (ssl->cert == NULL)
808                 {
809                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
810                 return 0;
811                 }
812         if (ssl->cert->key->x509 == NULL)
813                 {
814                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
815                 return(0);
816                 }
817         if (ssl->cert->key->privatekey == NULL)
818                 {
819                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
820                 return(0);
821                 }
822         return(X509_check_private_key(ssl->cert->key->x509,
823                 ssl->cert->key->privatekey));
824         }
825
826 int SSL_accept(SSL *s)
827         {
828         if (s->handshake_func == 0)
829                 /* Not properly initialized yet */
830                 SSL_set_accept_state(s);
831
832         return(s->method->ssl_accept(s));
833         }
834
835 int SSL_connect(SSL *s)
836         {
837         if (s->handshake_func == 0)
838                 /* Not properly initialized yet */
839                 SSL_set_connect_state(s);
840
841         return(s->method->ssl_connect(s));
842         }
843
844 long SSL_get_default_timeout(SSL *s)
845         {
846         return(s->method->get_timeout());
847         }
848
849 int SSL_read(SSL *s,void *buf,int num)
850         {
851         if (s->handshake_func == 0)
852                 {
853                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
854                 return -1;
855                 }
856
857         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
858                 {
859                 s->rwstate=SSL_NOTHING;
860                 return(0);
861                 }
862         return(s->method->ssl_read(s,buf,num));
863         }
864
865 int SSL_peek(SSL *s,void *buf,int num)
866         {
867         if (s->handshake_func == 0)
868                 {
869                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
870                 return -1;
871                 }
872
873         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
874                 {
875                 return(0);
876                 }
877         return(s->method->ssl_peek(s,buf,num));
878         }
879
880 int SSL_write(SSL *s,const void *buf,int num)
881         {
882         if (s->handshake_func == 0)
883                 {
884                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
885                 return -1;
886                 }
887
888         if (s->shutdown & SSL_SENT_SHUTDOWN)
889                 {
890                 s->rwstate=SSL_NOTHING;
891                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
892                 return(-1);
893                 }
894         return(s->method->ssl_write(s,buf,num));
895         }
896
897 int SSL_shutdown(SSL *s)
898         {
899         /* Note that this function behaves differently from what one might
900          * expect.  Return values are 0 for no success (yet),
901          * 1 for success; but calling it once is usually not enough,
902          * even if blocking I/O is used (see ssl3_shutdown).
903          */
904
905         if (s->handshake_func == 0)
906                 {
907                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
908                 return -1;
909                 }
910
911         if ((s != NULL) && !SSL_in_init(s))
912                 return(s->method->ssl_shutdown(s));
913         else
914                 return(1);
915         }
916
917 int SSL_renegotiate(SSL *s)
918         {
919         if (s->new_session == 0)
920                 {
921                 s->new_session=1;
922                 }
923         return(s->method->ssl_renegotiate(s));
924         }
925
926 int SSL_renegotiate_pending(SSL *s)
927         {
928         /* becomes true when negotiation is requested;
929          * false again once a handshake has finished */
930         return (s->new_session != 0);
931         }
932
933 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
934         {
935         long l;
936
937         switch (cmd)
938                 {
939         case SSL_CTRL_GET_READ_AHEAD:
940                 return(s->read_ahead);
941         case SSL_CTRL_SET_READ_AHEAD:
942                 l=s->read_ahead;
943                 s->read_ahead=larg;
944                 return(l);
945
946         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
947                 s->msg_callback_arg = parg;
948                 return 1;
949
950         case SSL_CTRL_OPTIONS:
951                 return(s->options|=larg);
952         case SSL_CTRL_MODE:
953                 return(s->mode|=larg);
954         case SSL_CTRL_GET_MAX_CERT_LIST:
955                 return(s->max_cert_list);
956         case SSL_CTRL_SET_MAX_CERT_LIST:
957                 l=s->max_cert_list;
958                 s->max_cert_list=larg;
959                 return(l);
960         default:
961                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
962                 }
963         }
964
965 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)())
966         {
967         switch(cmd)
968                 {
969         case SSL_CTRL_SET_MSG_CALLBACK:
970                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
971                 return 1;
972                 
973         default:
974                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
975                 }
976         }
977
978 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
979         {
980         return ctx->sessions;
981         }
982
983 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
984         {
985         long l;
986
987         switch (cmd)
988                 {
989         case SSL_CTRL_GET_READ_AHEAD:
990                 return(ctx->read_ahead);
991         case SSL_CTRL_SET_READ_AHEAD:
992                 l=ctx->read_ahead;
993                 ctx->read_ahead=larg;
994                 return(l);
995                 
996         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
997                 ctx->msg_callback_arg = parg;
998                 return 1;
999
1000         case SSL_CTRL_GET_MAX_CERT_LIST:
1001                 return(ctx->max_cert_list);
1002         case SSL_CTRL_SET_MAX_CERT_LIST:
1003                 l=ctx->max_cert_list;
1004                 ctx->max_cert_list=larg;
1005                 return(l);
1006
1007         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1008                 l=ctx->session_cache_size;
1009                 ctx->session_cache_size=larg;
1010                 return(l);
1011         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1012                 return(ctx->session_cache_size);
1013         case SSL_CTRL_SET_SESS_CACHE_MODE:
1014                 l=ctx->session_cache_mode;
1015                 ctx->session_cache_mode=larg;
1016                 return(l);
1017         case SSL_CTRL_GET_SESS_CACHE_MODE:
1018                 return(ctx->session_cache_mode);
1019
1020         case SSL_CTRL_SESS_NUMBER:
1021                 return(ctx->sessions->num_items);
1022         case SSL_CTRL_SESS_CONNECT:
1023                 return(ctx->stats.sess_connect);
1024         case SSL_CTRL_SESS_CONNECT_GOOD:
1025                 return(ctx->stats.sess_connect_good);
1026         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1027                 return(ctx->stats.sess_connect_renegotiate);
1028         case SSL_CTRL_SESS_ACCEPT:
1029                 return(ctx->stats.sess_accept);
1030         case SSL_CTRL_SESS_ACCEPT_GOOD:
1031                 return(ctx->stats.sess_accept_good);
1032         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1033                 return(ctx->stats.sess_accept_renegotiate);
1034         case SSL_CTRL_SESS_HIT:
1035                 return(ctx->stats.sess_hit);
1036         case SSL_CTRL_SESS_CB_HIT:
1037                 return(ctx->stats.sess_cb_hit);
1038         case SSL_CTRL_SESS_MISSES:
1039                 return(ctx->stats.sess_miss);
1040         case SSL_CTRL_SESS_TIMEOUTS:
1041                 return(ctx->stats.sess_timeout);
1042         case SSL_CTRL_SESS_CACHE_FULL:
1043                 return(ctx->stats.sess_cache_full);
1044         case SSL_CTRL_OPTIONS:
1045                 return(ctx->options|=larg);
1046         case SSL_CTRL_MODE:
1047                 return(ctx->mode|=larg);
1048         default:
1049                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1050                 }
1051         }
1052
1053 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
1054         {
1055         switch(cmd)
1056                 {
1057         case SSL_CTRL_SET_MSG_CALLBACK:
1058                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1059                 return 1;
1060
1061         default:
1062                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1063                 }
1064         }
1065
1066 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1067         {
1068         long l;
1069
1070         l=a->id-b->id;
1071         if (l == 0L)
1072                 return(0);
1073         else
1074                 return((l > 0)?1:-1);
1075         }
1076
1077 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1078                         const SSL_CIPHER * const *bp)
1079         {
1080         long l;
1081
1082         l=(*ap)->id-(*bp)->id;
1083         if (l == 0L)
1084                 return(0);
1085         else
1086                 return((l > 0)?1:-1);
1087         }
1088
1089 /** return a STACK of the ciphers available for the SSL and in order of
1090  * preference */
1091 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
1092         {
1093         if (s != NULL)
1094                 {
1095                 if (s->cipher_list != NULL)
1096                         {
1097                         return(s->cipher_list);
1098                         }
1099                 else if ((s->ctx != NULL) &&
1100                         (s->ctx->cipher_list != NULL))
1101                         {
1102                         return(s->ctx->cipher_list);
1103                         }
1104                 }
1105         return(NULL);
1106         }
1107
1108 /** return a STACK of the ciphers available for the SSL and in order of
1109  * algorithm id */
1110 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1111         {
1112         if (s != NULL)
1113                 {
1114                 if (s->cipher_list_by_id != NULL)
1115                         {
1116                         return(s->cipher_list_by_id);
1117                         }
1118                 else if ((s->ctx != NULL) &&
1119                         (s->ctx->cipher_list_by_id != NULL))
1120                         {
1121                         return(s->ctx->cipher_list_by_id);
1122                         }
1123                 }
1124         return(NULL);
1125         }
1126
1127 /** The old interface to get the same thing as SSL_get_ciphers() */
1128 const char *SSL_get_cipher_list(SSL *s,int n)
1129         {
1130         SSL_CIPHER *c;
1131         STACK_OF(SSL_CIPHER) *sk;
1132
1133         if (s == NULL) return(NULL);
1134         sk=SSL_get_ciphers(s);
1135         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1136                 return(NULL);
1137         c=sk_SSL_CIPHER_value(sk,n);
1138         if (c == NULL) return(NULL);
1139         return(c->name);
1140         }
1141
1142 /** specify the ciphers to be used by default by the SSL_CTX */
1143 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1144         {
1145         STACK_OF(SSL_CIPHER) *sk;
1146         
1147         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1148                 &ctx->cipher_list_by_id,str);
1149 /* XXXX */
1150         return((sk == NULL)?0:1);
1151         }
1152
1153 /** specify the ciphers to be used by the SSL */
1154 int SSL_set_cipher_list(SSL *s,const char *str)
1155         {
1156         STACK_OF(SSL_CIPHER) *sk;
1157         
1158         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1159                 &s->cipher_list_by_id,str);
1160 /* XXXX */
1161         return((sk == NULL)?0:1);
1162         }
1163
1164 /* works well for SSLv2, not so good for SSLv3 */
1165 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
1166         {
1167         char *p;
1168         const char *cp;
1169         STACK_OF(SSL_CIPHER) *sk;
1170         SSL_CIPHER *c;
1171         int i;
1172
1173         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1174                 (len < 2))
1175                 return(NULL);
1176
1177         p=buf;
1178         sk=s->session->ciphers;
1179         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1180                 {
1181                 /* Decrement for either the ':' or a '\0' */
1182                 len--;
1183                 c=sk_SSL_CIPHER_value(sk,i);
1184                 for (cp=c->name; *cp; )
1185                         {
1186                         if (len-- == 0)
1187                                 {
1188                                 *p='\0';
1189                                 return(buf);
1190                                 }
1191                         else
1192                                 *(p++)= *(cp++);
1193                         }
1194                 *(p++)=':';
1195                 }
1196         p[-1]='\0';
1197         return(buf);
1198         }
1199
1200 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
1201         {
1202         int i,j=0;
1203         SSL_CIPHER *c;
1204         unsigned char *q;
1205 #ifndef OPENSSL_NO_KRB5
1206         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1207 #endif /* OPENSSL_NO_KRB5 */
1208
1209         if (sk == NULL) return(0);
1210         q=p;
1211
1212         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1213                 {
1214                 c=sk_SSL_CIPHER_value(sk,i);
1215 #ifndef OPENSSL_NO_KRB5
1216                 if ((c->algorithms & SSL_KRB5) && nokrb5)
1217                     continue;
1218 #endif /* OPENSSL_NO_KRB5 */                    
1219                 j=ssl_put_cipher_by_char(s,c,p);
1220                 p+=j;
1221                 }
1222         return(p-q);
1223         }
1224
1225 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1226                                                STACK_OF(SSL_CIPHER) **skp)
1227         {
1228         SSL_CIPHER *c;
1229         STACK_OF(SSL_CIPHER) *sk;
1230         int i,n;
1231
1232         n=ssl_put_cipher_by_char(s,NULL,NULL);
1233         if ((num%n) != 0)
1234                 {
1235                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1236                 return(NULL);
1237                 }
1238         if ((skp == NULL) || (*skp == NULL))
1239                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1240         else
1241                 {
1242                 sk= *skp;
1243                 sk_SSL_CIPHER_zero(sk);
1244                 }
1245
1246         for (i=0; i<num; i+=n)
1247                 {
1248                 c=ssl_get_cipher_by_char(s,p);
1249                 p+=n;
1250                 if (c != NULL)
1251                         {
1252                         if (!sk_SSL_CIPHER_push(sk,c))
1253                                 {
1254                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1255                                 goto err;
1256                                 }
1257                         }
1258                 }
1259
1260         if (skp != NULL)
1261                 *skp=sk;
1262         return(sk);
1263 err:
1264         if ((skp == NULL) || (*skp == NULL))
1265                 sk_SSL_CIPHER_free(sk);
1266         return(NULL);
1267         }
1268
1269 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
1270         {
1271         unsigned long l;
1272
1273         l=(unsigned long)
1274                 ((unsigned int) a->session_id[0]     )|
1275                 ((unsigned int) a->session_id[1]<< 8L)|
1276                 ((unsigned long)a->session_id[2]<<16L)|
1277                 ((unsigned long)a->session_id[3]<<24L);
1278         return(l);
1279         }
1280
1281 /* NB: If this function (or indeed the hash function which uses a sort of
1282  * coarser function than this one) is changed, ensure
1283  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1284  * able to construct an SSL_SESSION that will collide with any existing session
1285  * with a matching session ID. */
1286 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
1287         {
1288         if (a->ssl_version != b->ssl_version)
1289                 return(1);
1290         if (a->session_id_length != b->session_id_length)
1291                 return(1);
1292         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1293         }
1294
1295 /* These wrapper functions should remain rather than redeclaring
1296  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1297  * variable. The reason is that the functions aren't static, they're exposed via
1298  * ssl.h. */
1299 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1300 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1301
1302 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1303         {
1304         SSL_CTX *ret=NULL;
1305         
1306         if (meth == NULL)
1307                 {
1308                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1309                 return(NULL);
1310                 }
1311
1312         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1313                 {
1314                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1315                 goto err;
1316                 }
1317         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1318         if (ret == NULL)
1319                 goto err;
1320
1321         memset(ret,0,sizeof(SSL_CTX));
1322
1323         ret->method=meth;
1324
1325         ret->cert_store=NULL;
1326         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1327         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1328         ret->session_cache_head=NULL;
1329         ret->session_cache_tail=NULL;
1330
1331         /* We take the system default */
1332         ret->session_timeout=meth->get_timeout();
1333
1334         ret->new_session_cb=0;
1335         ret->remove_session_cb=0;
1336         ret->get_session_cb=0;
1337         ret->generate_session_id=0;
1338
1339         memset((char *)&ret->stats,0,sizeof(ret->stats));
1340
1341         ret->references=1;
1342         ret->quiet_shutdown=0;
1343
1344 /*      ret->cipher=NULL;*/
1345 /*      ret->s2->challenge=NULL;
1346         ret->master_key=NULL;
1347         ret->key_arg=NULL;
1348         ret->s2->conn_id=NULL; */
1349
1350         ret->info_callback=NULL;
1351
1352         ret->app_verify_callback=0;
1353         ret->app_verify_arg=NULL;
1354
1355         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1356         ret->read_ahead=0;
1357         ret->msg_callback=0;
1358         ret->msg_callback_arg=NULL;
1359         ret->verify_mode=SSL_VERIFY_NONE;
1360 #if 0
1361         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1362 #endif
1363         ret->sid_ctx_length=0;
1364         ret->default_verify_callback=NULL;
1365         if ((ret->cert=ssl_cert_new()) == NULL)
1366                 goto err;
1367
1368         ret->default_passwd_callback=0;
1369         ret->default_passwd_callback_userdata=NULL;
1370         ret->client_cert_cb=0;
1371
1372         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1373                         LHASH_COMP_FN(SSL_SESSION_cmp));
1374         if (ret->sessions == NULL) goto err;
1375         ret->cert_store=X509_STORE_new();
1376         if (ret->cert_store == NULL) goto err;
1377
1378         ssl_create_cipher_list(ret->method,
1379                 &ret->cipher_list,&ret->cipher_list_by_id,
1380                 SSL_DEFAULT_CIPHER_LIST);
1381         if (ret->cipher_list == NULL
1382             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1383                 {
1384                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1385                 goto err2;
1386                 }
1387
1388         ret->param = X509_VERIFY_PARAM_new();
1389         if (!ret->param)
1390                 goto err;
1391
1392         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1393                 {
1394                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1395                 goto err2;
1396                 }
1397         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1398                 {
1399                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1400                 goto err2;
1401                 }
1402         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1403                 {
1404                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1405                 goto err2;
1406                 }
1407
1408         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1409                 goto err;
1410
1411         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1412
1413         ret->extra_certs=NULL;
1414         ret->comp_methods=SSL_COMP_get_compression_methods();
1415
1416         return(ret);
1417 err:
1418         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1419 err2:
1420         if (ret != NULL) SSL_CTX_free(ret);
1421         return(NULL);
1422         }
1423
1424 #if 0
1425 static void SSL_COMP_free(SSL_COMP *comp)
1426     { OPENSSL_free(comp); }
1427 #endif
1428
1429 void SSL_CTX_free(SSL_CTX *a)
1430         {
1431         int i;
1432
1433         if (a == NULL) return;
1434
1435         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1436 #ifdef REF_PRINT
1437         REF_PRINT("SSL_CTX",a);
1438 #endif
1439         if (i > 0) return;
1440 #ifdef REF_CHECK
1441         if (i < 0)
1442                 {
1443                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1444                 abort(); /* ok */
1445                 }
1446 #endif
1447
1448         if (a->param)
1449                 X509_VERIFY_PARAM_free(a->param);
1450
1451         /*
1452          * Free internal session cache. However: the remove_cb() may reference
1453          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1454          * after the sessions were flushed.
1455          * As the ex_data handling routines might also touch the session cache,
1456          * the most secure solution seems to be: empty (flush) the cache, then
1457          * free ex_data, then finally free the cache.
1458          * (See ticket [openssl.org #212].)
1459          */
1460         if (a->sessions != NULL)
1461                 SSL_CTX_flush_sessions(a,0);
1462
1463         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1464
1465         if (a->sessions != NULL)
1466                 lh_free(a->sessions);
1467
1468         if (a->cert_store != NULL)
1469                 X509_STORE_free(a->cert_store);
1470         if (a->cipher_list != NULL)
1471                 sk_SSL_CIPHER_free(a->cipher_list);
1472         if (a->cipher_list_by_id != NULL)
1473                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1474         if (a->cert != NULL)
1475                 ssl_cert_free(a->cert);
1476         if (a->client_CA != NULL)
1477                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1478         if (a->extra_certs != NULL)
1479                 sk_X509_pop_free(a->extra_certs,X509_free);
1480 #if 0 /* This should never be done, since it removes a global database */
1481         if (a->comp_methods != NULL)
1482                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1483 #else
1484         a->comp_methods = NULL;
1485 #endif
1486         OPENSSL_free(a);
1487         }
1488
1489 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1490         {
1491         ctx->default_passwd_callback=cb;
1492         }
1493
1494 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1495         {
1496         ctx->default_passwd_callback_userdata=u;
1497         }
1498
1499 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1500         {
1501         ctx->app_verify_callback=cb;
1502         ctx->app_verify_arg=arg;
1503         }
1504
1505 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1506         {
1507         ctx->verify_mode=mode;
1508         ctx->default_verify_callback=cb;
1509         }
1510
1511 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1512         {
1513         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1514         }
1515
1516 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1517         {
1518         CERT_PKEY *cpk;
1519         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1520         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1521         int rsa_tmp_export,dh_tmp_export,kl;
1522         unsigned long mask,emask;
1523         int have_ecc_cert, have_ecdh_tmp, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1524         X509 *x = NULL;
1525         EVP_PKEY *ecc_pkey = NULL;
1526         int signature_nid = 0;
1527
1528         if (c == NULL) return;
1529
1530         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1531
1532 #ifndef OPENSSL_NO_RSA
1533         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1534         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1535                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1536 #else
1537         rsa_tmp=rsa_tmp_export=0;
1538 #endif
1539 #ifndef OPENSSL_NO_DH
1540         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1541         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1542                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1543 #else
1544         dh_tmp=dh_tmp_export=0;
1545 #endif
1546
1547 #ifndef OPENSSL_NO_ECDH
1548         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1549 #endif
1550         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1551         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1552         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1553         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1554         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1555         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1556         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1557         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1558         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1559         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1560         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1561 /* FIX THIS EAY EAY EAY */
1562         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1563         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1564         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1565         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1566         mask=0;
1567         emask=0;
1568
1569 #ifdef CIPHER_DEBUG
1570         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1571                 rsa_tmp,rsa_tmp_export,dh_tmp,
1572                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1573 #endif
1574
1575         if (rsa_enc || (rsa_tmp && rsa_sign))
1576                 mask|=SSL_kRSA;
1577         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1578                 emask|=SSL_kRSA;
1579
1580 #if 0
1581         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1582         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1583                 (rsa_enc || rsa_sign || dsa_sign))
1584                 mask|=SSL_kEDH;
1585         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1586                 (rsa_enc || rsa_sign || dsa_sign))
1587                 emask|=SSL_kEDH;
1588 #endif
1589
1590         if (dh_tmp_export) 
1591                 emask|=SSL_kEDH;
1592
1593         if (dh_tmp)
1594                 mask|=SSL_kEDH;
1595
1596         if (dh_rsa) mask|=SSL_kDHr;
1597         if (dh_rsa_export) emask|=SSL_kDHr;
1598
1599         if (dh_dsa) mask|=SSL_kDHd;
1600         if (dh_dsa_export) emask|=SSL_kDHd;
1601
1602         if (rsa_enc || rsa_sign)
1603                 {
1604                 mask|=SSL_aRSA;
1605                 mask|=SSL_aRSA;
1606                 }
1607
1608         if (dsa_sign)
1609                 {
1610                 mask|=SSL_aDSS;
1611                 emask|=SSL_aDSS;
1612                 }
1613
1614         mask|=SSL_aNULL;
1615         emask|=SSL_aNULL;
1616
1617 #ifndef OPENSSL_NO_KRB5
1618         mask|=SSL_kKRB5|SSL_aKRB5;
1619         emask|=SSL_kKRB5|SSL_aKRB5;
1620 #endif
1621
1622         /* An ECC certificate may be usable for ECDH and/or
1623          * ECDSA cipher suites depending on the key usage extension.
1624          */
1625         if (have_ecc_cert)
1626                 {
1627                 /* This call populates extension flags (ex_flags) */
1628                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1629                 X509_check_purpose(x, -1, 0);
1630                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1631                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1632                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1633                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1634                 ecc_pkey = X509_get_pubkey(x);
1635                 ecc_pkey_size = (ecc_pkey != NULL) ? 
1636                     EVP_PKEY_bits(ecc_pkey) : 0;
1637                 EVP_PKEY_free(ecc_pkey);
1638                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1639                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1640 #ifndef OPENSSL_NO_ECDH
1641                 if (ecdh_ok)
1642                         {
1643                         if ((signature_nid == NID_md5WithRSAEncryption) ||
1644                             (signature_nid == NID_md4WithRSAEncryption) ||
1645                             (signature_nid == NID_md2WithRSAEncryption))
1646                                 {
1647                                 mask|=SSL_kECDH|SSL_aRSA;
1648                                 if (ecc_pkey_size <= 163)
1649                                         emask|=SSL_kECDH|SSL_aRSA;
1650                                 }
1651                         if (signature_nid == NID_ecdsa_with_SHA1)
1652                                 {
1653                                 mask|=SSL_kECDH|SSL_aECDSA;
1654                                 if (ecc_pkey_size <= 163)
1655                                         emask|=SSL_kECDH|SSL_aECDSA;
1656                                 }
1657                         }
1658 #endif
1659 #ifndef OPENSSL_NO_ECDSA
1660                 if (ecdsa_ok)
1661                         {
1662                         mask|=SSL_aECDSA;
1663                         emask|=SSL_aECDSA;
1664                         }
1665 #endif
1666                 }
1667
1668 #ifndef OPENSSL_NO_ECDH
1669         if (have_ecdh_tmp)
1670                 {
1671                 mask|=SSL_kECDHE;
1672                 emask|=SSL_kECDHE;
1673                 }
1674 #endif
1675         c->mask=mask;
1676         c->export_mask=emask;
1677         c->valid=1;
1678         }
1679
1680 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1681 #define ku_reject(x, usage) \
1682         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1683
1684 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1685         {
1686         unsigned long alg = cs->algorithms;
1687         EVP_PKEY *pkey = NULL;
1688         int keysize = 0;
1689         int signature_nid = 0;
1690
1691         if (SSL_C_IS_EXPORT(cs))
1692                 {
1693                 /* ECDH key length in export ciphers must be <= 163 bits */
1694                 pkey = X509_get_pubkey(x);
1695                 if (pkey == NULL) return 0;
1696                 keysize = EVP_PKEY_bits(pkey);
1697                 EVP_PKEY_free(pkey);
1698                 if (keysize > 163) return 0;
1699                 }
1700
1701         /* This call populates the ex_flags field correctly */
1702         X509_check_purpose(x, -1, 0);
1703         if ((x->sig_alg) && (x->sig_alg->algorithm))
1704                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1705         if (alg & SSL_kECDH) 
1706                 {
1707                 /* key usage, if present, must allow key agreement */
1708                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1709                         {
1710                         return 0;
1711                         }
1712                 if (alg & SSL_aECDSA) 
1713                         {
1714                         /* signature alg must be ECDSA */
1715                         if (signature_nid != NID_ecdsa_with_SHA1)
1716                                 {
1717                                 return 0;
1718                                 }
1719                         }
1720                 if (alg & SSL_aRSA)
1721                         {
1722                         /* signature alg must be RSA */
1723                         if ((signature_nid != NID_md5WithRSAEncryption) &&
1724                             (signature_nid != NID_md4WithRSAEncryption) &&
1725                             (signature_nid != NID_md2WithRSAEncryption))
1726                                 {
1727                                 return 0;
1728                                 }
1729                         }
1730                 } 
1731         else if (alg & SSL_aECDSA)
1732                 {
1733                 /* key usage, if present, must allow signing */
1734                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1735                         {
1736                         return 0;
1737                         }
1738                 }
1739
1740         return 1;  /* all checks are ok */
1741         }
1742
1743 /* THIS NEEDS CLEANING UP */
1744 X509 *ssl_get_server_send_cert(SSL *s)
1745         {
1746         unsigned long alg,mask,kalg;
1747         CERT *c;
1748         int i,is_export;
1749
1750         c=s->cert;
1751         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1752         alg=s->s3->tmp.new_cipher->algorithms;
1753         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1754         mask=is_export?c->export_mask:c->mask;
1755         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1756
1757         if (kalg & SSL_kECDH)
1758                 {
1759                 /* we don't need to look at SSL_kECDHE 
1760                  * since no certificate is needed for
1761                  * anon ECDH and for authenticated
1762                  * ECDHE, the check for the auth 
1763                  * algorithm will set i correctly
1764                  * NOTE: For ECDH-RSA, we need an ECC
1765                  * not an RSA cert but for ECDHE-RSA
1766                  * we need an RSA cert. Placing the
1767                  * checks for SSL_kECDH before RSA
1768                  * checks ensures the correct cert is chosen.
1769                  */
1770                 i=SSL_PKEY_ECC;
1771                 }
1772         else if (kalg & SSL_aECDSA)
1773                 {
1774                 i=SSL_PKEY_ECC;
1775                 }
1776         else if (kalg & SSL_kDHr)
1777                 i=SSL_PKEY_DH_RSA;
1778         else if (kalg & SSL_kDHd)
1779                 i=SSL_PKEY_DH_DSA;
1780         else if (kalg & SSL_aDSS)
1781                 i=SSL_PKEY_DSA_SIGN;
1782         else if (kalg & SSL_aRSA)
1783                 {
1784                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1785                         i=SSL_PKEY_RSA_SIGN;
1786                 else
1787                         i=SSL_PKEY_RSA_ENC;
1788                 }
1789         else if (kalg & SSL_aKRB5)
1790                 {
1791                 /* VRS something else here? */
1792                 return(NULL);
1793                 }
1794         else /* if (kalg & SSL_aNULL) */
1795                 {
1796                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
1797                 return(NULL);
1798                 }
1799         if (c->pkeys[i].x509 == NULL) return(NULL);
1800
1801         return(c->pkeys[i].x509);
1802         }
1803
1804 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1805         {
1806         unsigned long alg;
1807         CERT *c;
1808
1809         alg=cipher->algorithms;
1810         c=s->cert;
1811
1812         if ((alg & SSL_aDSS) &&
1813                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1814                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1815         else if (alg & SSL_aRSA)
1816                 {
1817                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1818                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1819                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1820                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1821                 else
1822                         return(NULL);
1823                 }
1824         else if ((alg & SSL_aECDSA) &&
1825                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
1826                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
1827         else /* if (alg & SSL_aNULL) */
1828                 {
1829                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
1830                 return(NULL);
1831                 }
1832         }
1833
1834 void ssl_update_cache(SSL *s,int mode)
1835         {
1836         int i;
1837
1838         /* If the session_id_length is 0, we are not supposed to cache it,
1839          * and it would be rather hard to do anyway :-) */
1840         if (s->session->session_id_length == 0) return;
1841
1842         i=s->ctx->session_cache_mode;
1843         if ((i & mode) && (!s->hit)
1844                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
1845                     || SSL_CTX_add_session(s->ctx,s->session))
1846                 && (s->ctx->new_session_cb != NULL))
1847                 {
1848                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1849                 if (!s->ctx->new_session_cb(s,s->session))
1850                         SSL_SESSION_free(s->session);
1851                 }
1852
1853         /* auto flush every 255 connections */
1854         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1855                 ((i & mode) == mode))
1856                 {
1857                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1858                         ?s->ctx->stats.sess_connect_good
1859                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1860                         {
1861                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1862                         }
1863                 }
1864         }
1865
1866 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1867         {
1868         return(s->method);
1869         }
1870
1871 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1872         {
1873         int conn= -1;
1874         int ret=1;
1875
1876         if (s->method != meth)
1877                 {
1878                 if (s->handshake_func != NULL)
1879                         conn=(s->handshake_func == s->method->ssl_connect);
1880
1881                 if (s->method->version == meth->version)
1882                         s->method=meth;
1883                 else
1884                         {
1885                         s->method->ssl_free(s);
1886                         s->method=meth;
1887                         ret=s->method->ssl_new(s);
1888                         }
1889
1890                 if (conn == 1)
1891                         s->handshake_func=meth->ssl_connect;
1892                 else if (conn == 0)
1893                         s->handshake_func=meth->ssl_accept;
1894                 }
1895         return(ret);
1896         }
1897
1898 int SSL_get_error(SSL *s,int i)
1899         {
1900         int reason;
1901         unsigned long l;
1902         BIO *bio;
1903
1904         if (i > 0) return(SSL_ERROR_NONE);
1905
1906         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1907          * etc, where we do encode the error */
1908         if ((l=ERR_peek_error()) != 0)
1909                 {
1910                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1911                         return(SSL_ERROR_SYSCALL);
1912                 else
1913                         return(SSL_ERROR_SSL);
1914                 }
1915
1916         if ((i < 0) && SSL_want_read(s))
1917                 {
1918                 bio=SSL_get_rbio(s);
1919                 if (BIO_should_read(bio))
1920                         return(SSL_ERROR_WANT_READ);
1921                 else if (BIO_should_write(bio))
1922                         /* This one doesn't make too much sense ... We never try
1923                          * to write to the rbio, and an application program where
1924                          * rbio and wbio are separate couldn't even know what it
1925                          * should wait for.
1926                          * However if we ever set s->rwstate incorrectly
1927                          * (so that we have SSL_want_read(s) instead of
1928                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1929                          * this test works around that bug; so it might be safer
1930                          * to keep it. */
1931                         return(SSL_ERROR_WANT_WRITE);
1932                 else if (BIO_should_io_special(bio))
1933                         {
1934                         reason=BIO_get_retry_reason(bio);
1935                         if (reason == BIO_RR_CONNECT)
1936                                 return(SSL_ERROR_WANT_CONNECT);
1937                         else if (reason == BIO_RR_ACCEPT)
1938                                 return(SSL_ERROR_WANT_ACCEPT);
1939                         else
1940                                 return(SSL_ERROR_SYSCALL); /* unknown */
1941                         }
1942                 }
1943
1944         if ((i < 0) && SSL_want_write(s))
1945                 {
1946                 bio=SSL_get_wbio(s);
1947                 if (BIO_should_write(bio))
1948                         return(SSL_ERROR_WANT_WRITE);
1949                 else if (BIO_should_read(bio))
1950                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1951                         return(SSL_ERROR_WANT_READ);
1952                 else if (BIO_should_io_special(bio))
1953                         {
1954                         reason=BIO_get_retry_reason(bio);
1955                         if (reason == BIO_RR_CONNECT)
1956                                 return(SSL_ERROR_WANT_CONNECT);
1957                         else if (reason == BIO_RR_ACCEPT)
1958                                 return(SSL_ERROR_WANT_ACCEPT);
1959                         else
1960                                 return(SSL_ERROR_SYSCALL);
1961                         }
1962                 }
1963         if ((i < 0) && SSL_want_x509_lookup(s))
1964                 {
1965                 return(SSL_ERROR_WANT_X509_LOOKUP);
1966                 }
1967
1968         if (i == 0)
1969                 {
1970                 if (s->version == SSL2_VERSION)
1971                         {
1972                         /* assume it is the socket being closed */
1973                         return(SSL_ERROR_ZERO_RETURN);
1974                         }
1975                 else
1976                         {
1977                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1978                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1979                                 return(SSL_ERROR_ZERO_RETURN);
1980                         }
1981                 }
1982         return(SSL_ERROR_SYSCALL);
1983         }
1984
1985 int SSL_do_handshake(SSL *s)
1986         {
1987         int ret=1;
1988
1989         if (s->handshake_func == NULL)
1990                 {
1991                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1992                 return(-1);
1993                 }
1994
1995         s->method->ssl_renegotiate_check(s);
1996
1997         if (SSL_in_init(s) || SSL_in_before(s))
1998                 {
1999                 ret=s->handshake_func(s);
2000                 }
2001         return(ret);
2002         }
2003
2004 /* For the next 2 functions, SSL_clear() sets shutdown and so
2005  * one of these calls will reset it */
2006 void SSL_set_accept_state(SSL *s)
2007         {
2008         s->server=1;
2009         s->shutdown=0;
2010         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2011         s->handshake_func=s->method->ssl_accept;
2012         /* clear the current cipher */
2013         ssl_clear_cipher_ctx(s);
2014         }
2015
2016 void SSL_set_connect_state(SSL *s)
2017         {
2018         s->server=0;
2019         s->shutdown=0;
2020         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2021         s->handshake_func=s->method->ssl_connect;
2022         /* clear the current cipher */
2023         ssl_clear_cipher_ctx(s);
2024         }
2025
2026 int ssl_undefined_function(SSL *s)
2027         {
2028         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2029         return(0);
2030         }
2031
2032 SSL_METHOD *ssl_bad_method(int ver)
2033         {
2034         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2035         return(NULL);
2036         }
2037
2038 const char *SSL_get_version(SSL *s)
2039         {
2040         if (s->version == TLS1_VERSION)
2041                 return("TLSv1");
2042         else if (s->version == SSL3_VERSION)
2043                 return("SSLv3");
2044         else if (s->version == SSL2_VERSION)
2045                 return("SSLv2");
2046         else
2047                 return("unknown");
2048         }
2049
2050 SSL *SSL_dup(SSL *s)
2051         {
2052         STACK_OF(X509_NAME) *sk;
2053         X509_NAME *xn;
2054         SSL *ret;
2055         int i;
2056                  
2057         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2058             return(NULL);
2059
2060         ret->version = s->version;
2061         ret->type = s->type;
2062         ret->method = s->method;
2063
2064         if (s->session != NULL)
2065                 {
2066                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2067                 SSL_copy_session_id(ret,s);
2068                 }
2069         else
2070                 {
2071                 /* No session has been established yet, so we have to expect
2072                  * that s->cert or ret->cert will be changed later --
2073                  * they should not both point to the same object,
2074                  * and thus we can't use SSL_copy_session_id. */
2075
2076                 ret->method->ssl_free(ret);
2077                 ret->method = s->method;
2078                 ret->method->ssl_new(ret);
2079
2080                 if (s->cert != NULL)
2081                         {
2082                         if (ret->cert != NULL)
2083                                 {
2084                                 ssl_cert_free(ret->cert);
2085                                 }
2086                         ret->cert = ssl_cert_dup(s->cert);
2087                         if (ret->cert == NULL)
2088                                 goto err;
2089                         }
2090                                 
2091                 SSL_set_session_id_context(ret,
2092                         s->sid_ctx, s->sid_ctx_length);
2093                 }
2094
2095         ret->options=s->options;
2096         ret->mode=s->mode;
2097         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2098         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2099         ret->msg_callback = s->msg_callback;
2100         ret->msg_callback_arg = s->msg_callback_arg;
2101         SSL_set_verify(ret,SSL_get_verify_mode(s),
2102                 SSL_get_verify_callback(s));
2103         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2104         ret->generate_session_id = s->generate_session_id;
2105
2106         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2107         
2108         ret->debug=s->debug;
2109
2110         /* copy app data, a little dangerous perhaps */
2111         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2112                 goto err;
2113
2114         /* setup rbio, and wbio */
2115         if (s->rbio != NULL)
2116                 {
2117                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2118                         goto err;
2119                 }
2120         if (s->wbio != NULL)
2121                 {
2122                 if (s->wbio != s->rbio)
2123                         {
2124                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2125                                 goto err;
2126                         }
2127                 else
2128                         ret->wbio=ret->rbio;
2129                 }
2130         ret->rwstate = s->rwstate;
2131         ret->in_handshake = s->in_handshake;
2132         ret->handshake_func = s->handshake_func;
2133         ret->server = s->server;
2134         ret->new_session = s->new_session;
2135         ret->quiet_shutdown = s->quiet_shutdown;
2136         ret->shutdown=s->shutdown;
2137         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2138         ret->rstate=s->rstate;
2139         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2140         ret->hit=s->hit;
2141
2142         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2143
2144         /* dup the cipher_list and cipher_list_by_id stacks */
2145         if (s->cipher_list != NULL)
2146                 {
2147                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2148                         goto err;
2149                 }
2150         if (s->cipher_list_by_id != NULL)
2151                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2152                         == NULL)
2153                         goto err;
2154
2155         /* Dup the client_CA list */
2156         if (s->client_CA != NULL)
2157                 {
2158                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2159                 ret->client_CA=sk;
2160                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2161                         {
2162                         xn=sk_X509_NAME_value(sk,i);
2163                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2164                                 {
2165                                 X509_NAME_free(xn);
2166                                 goto err;
2167                                 }
2168                         }
2169                 }
2170
2171         if (0)
2172                 {
2173 err:
2174                 if (ret != NULL) SSL_free(ret);
2175                 ret=NULL;
2176                 }
2177         return(ret);
2178         }
2179
2180 void ssl_clear_cipher_ctx(SSL *s)
2181         {
2182         if (s->enc_read_ctx != NULL)
2183                 {
2184                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2185                 OPENSSL_free(s->enc_read_ctx);
2186                 s->enc_read_ctx=NULL;
2187                 }
2188         if (s->enc_write_ctx != NULL)
2189                 {
2190                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2191                 OPENSSL_free(s->enc_write_ctx);
2192                 s->enc_write_ctx=NULL;
2193                 }
2194         if (s->expand != NULL)
2195                 {
2196                 COMP_CTX_free(s->expand);
2197                 s->expand=NULL;
2198                 }
2199         if (s->compress != NULL)
2200                 {
2201                 COMP_CTX_free(s->compress);
2202                 s->compress=NULL;
2203                 }
2204         }
2205
2206 /* Fix this function so that it takes an optional type parameter */
2207 X509 *SSL_get_certificate(SSL *s)
2208         {
2209         if (s->cert != NULL)
2210                 return(s->cert->key->x509);
2211         else
2212                 return(NULL);
2213         }
2214
2215 /* Fix this function so that it takes an optional type parameter */
2216 EVP_PKEY *SSL_get_privatekey(SSL *s)
2217         {
2218         if (s->cert != NULL)
2219                 return(s->cert->key->privatekey);
2220         else
2221                 return(NULL);
2222         }
2223
2224 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
2225         {
2226         if ((s->session != NULL) && (s->session->cipher != NULL))
2227                 return(s->session->cipher);
2228         return(NULL);
2229         }
2230
2231 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2232         {
2233         if (s->compress != NULL)
2234                 return(s->compress->meth);
2235         return(NULL);
2236         }
2237
2238 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2239         {
2240         if (s->expand != NULL)
2241                 return(s->expand->meth);
2242         return(NULL);
2243         }
2244
2245 int ssl_init_wbio_buffer(SSL *s,int push)
2246         {
2247         BIO *bbio;
2248
2249         if (s->bbio == NULL)
2250                 {
2251                 bbio=BIO_new(BIO_f_buffer());
2252                 if (bbio == NULL) return(0);
2253                 s->bbio=bbio;
2254                 }
2255         else
2256                 {
2257                 bbio=s->bbio;
2258                 if (s->bbio == s->wbio)
2259                         s->wbio=BIO_pop(s->wbio);
2260                 }
2261         (void)BIO_reset(bbio);
2262 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2263         if (!BIO_set_read_buffer_size(bbio,1))
2264                 {
2265                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2266                 return(0);
2267                 }
2268         if (push)
2269                 {
2270                 if (s->wbio != bbio)
2271                         s->wbio=BIO_push(bbio,s->wbio);
2272                 }
2273         else
2274                 {
2275                 if (s->wbio == bbio)
2276                         s->wbio=BIO_pop(bbio);
2277                 }
2278         return(1);
2279         }
2280
2281 void ssl_free_wbio_buffer(SSL *s)
2282         {
2283         if (s->bbio == NULL) return;
2284
2285         if (s->bbio == s->wbio)
2286                 {
2287                 /* remove buffering */
2288                 s->wbio=BIO_pop(s->wbio);
2289 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2290                 assert(s->wbio != NULL);
2291 #endif  
2292         }
2293         BIO_free(s->bbio);
2294         s->bbio=NULL;
2295         }
2296         
2297 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2298         {
2299         ctx->quiet_shutdown=mode;
2300         }
2301
2302 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
2303         {
2304         return(ctx->quiet_shutdown);
2305         }
2306
2307 void SSL_set_quiet_shutdown(SSL *s,int mode)
2308         {
2309         s->quiet_shutdown=mode;
2310         }
2311
2312 int SSL_get_quiet_shutdown(SSL *s)
2313         {
2314         return(s->quiet_shutdown);
2315         }
2316
2317 void SSL_set_shutdown(SSL *s,int mode)
2318         {
2319         s->shutdown=mode;
2320         }
2321
2322 int SSL_get_shutdown(SSL *s)
2323         {
2324         return(s->shutdown);
2325         }
2326
2327 int SSL_version(SSL *s)
2328         {
2329         return(s->version);
2330         }
2331
2332 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
2333         {
2334         return(ssl->ctx);
2335         }
2336
2337 #ifndef OPENSSL_NO_STDIO
2338 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2339         {
2340         return(X509_STORE_set_default_paths(ctx->cert_store));
2341         }
2342
2343 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2344                 const char *CApath)
2345         {
2346         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2347         }
2348 #endif
2349
2350 void SSL_set_info_callback(SSL *ssl,
2351                            void (*cb)(const SSL *ssl,int type,int val))
2352         {
2353         ssl->info_callback=cb;
2354         }
2355
2356 void (*SSL_get_info_callback(SSL *ssl))(const SSL *ssl,int type,int val)
2357         {
2358         return ssl->info_callback;
2359         }
2360
2361 int SSL_state(SSL *ssl)
2362         {
2363         return(ssl->state);
2364         }
2365
2366 void SSL_set_verify_result(SSL *ssl,long arg)
2367         {
2368         ssl->verify_result=arg;
2369         }
2370
2371 long SSL_get_verify_result(SSL *ssl)
2372         {
2373         return(ssl->verify_result);
2374         }
2375
2376 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2377                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2378         {
2379         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2380                                 new_func, dup_func, free_func);
2381         }
2382
2383 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2384         {
2385         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2386         }
2387
2388 void *SSL_get_ex_data(SSL *s,int idx)
2389         {
2390         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2391         }
2392
2393 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2394                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2395         {
2396         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2397                                 new_func, dup_func, free_func);
2398         }
2399
2400 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2401         {
2402         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2403         }
2404
2405 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
2406         {
2407         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2408         }
2409
2410 int ssl_ok(SSL *s)
2411         {
2412         return(1);
2413         }
2414
2415 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
2416         {
2417         return(ctx->cert_store);
2418         }
2419
2420 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2421         {
2422         if (ctx->cert_store != NULL)
2423                 X509_STORE_free(ctx->cert_store);
2424         ctx->cert_store=store;
2425         }
2426
2427 int SSL_want(SSL *s)
2428         {
2429         return(s->rwstate);
2430         }
2431
2432 /*!
2433  * \brief Set the callback for generating temporary RSA keys.
2434  * \param ctx the SSL context.
2435  * \param cb the callback
2436  */
2437
2438 #ifndef OPENSSL_NO_RSA
2439 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2440                                                           int is_export,
2441                                                           int keylength))
2442     {
2443     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2444     }
2445
2446 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2447                                                   int is_export,
2448                                                   int keylength))
2449     {
2450     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2451     }
2452 #endif
2453
2454 #ifdef DOXYGEN
2455 /*!
2456  * \brief The RSA temporary key callback function.
2457  * \param ssl the SSL session.
2458  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2459  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2460  * of the required key in bits.
2461  * \return the temporary RSA key.
2462  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2463  */
2464
2465 RSA *cb(SSL *ssl,int is_export,int keylength)
2466     {}
2467 #endif
2468
2469 /*!
2470  * \brief Set the callback for generating temporary DH keys.
2471  * \param ctx the SSL context.
2472  * \param dh the callback
2473  */
2474
2475 #ifndef OPENSSL_NO_DH
2476 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2477                                                         int keylength))
2478         {
2479         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2480         }
2481
2482 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2483                                                 int keylength))
2484         {
2485         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2486         }
2487 #endif
2488
2489 #ifndef OPENSSL_NO_ECDH
2490 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2491                                                         int keylength))
2492         {
2493         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)())ecdh);
2494         }
2495
2496 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2497                                                 int keylength))
2498         {
2499         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)())ecdh);
2500         }
2501 #endif
2502
2503
2504 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2505         {
2506         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)())cb);
2507         }
2508 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2509         {
2510         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)())cb);
2511         }
2512
2513
2514
2515 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2516 #include "../crypto/bio/bss_file.c"
2517 #endif
2518
2519 IMPLEMENT_STACK_OF(SSL_CIPHER)
2520 IMPLEMENT_STACK_OF(SSL_COMP)