ee01a2c87934ed80557d327ee08d34f6f811d017
[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) 1998-2007 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  * Copyright 2005 Nokia. All rights reserved.
120  *
121  * The portions of the attached software ("Contribution") is developed by
122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
123  * license.
124  *
125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
127  * support (see RFC 4279) to OpenSSL.
128  *
129  * No patent licenses or other rights except those expressly stated in
130  * the OpenSSL open source license shall be deemed granted or received
131  * expressly, by implication, estoppel, or otherwise.
132  *
133  * No assurances are provided by Nokia that the Contribution does not
134  * infringe the patent or other intellectual property rights of any third
135  * party or that the license provides you with all the necessary rights
136  * to make use of the Contribution.
137  *
138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
142  * OTHERWISE.
143  */
144
145 #ifdef REF_CHECK
146 #  include <assert.h>
147 #endif
148 #include <stdio.h>
149 #include "ssl_locl.h"
150 #include "kssl_lcl.h"
151 #include <openssl/objects.h>
152 #include <openssl/lhash.h>
153 #include <openssl/x509v3.h>
154 #include <openssl/rand.h>
155 #include <openssl/ocsp.h>
156 #ifndef OPENSSL_NO_DH
157 #include <openssl/dh.h>
158 #endif
159 #ifndef OPENSSL_NO_ENGINE
160 #include <openssl/engine.h>
161 #endif
162
163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
164
165 SSL3_ENC_METHOD ssl3_undef_enc_method={
166         /* evil casts, but these functions are only called if there's a library bug */
167         (int (*)(SSL *,int))ssl_undefined_function,
168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
169         ssl_undefined_function,
170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
171         (int (*)(SSL*, int))ssl_undefined_function,
172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
173         0,      /* finish_mac_length */
174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
175         NULL,   /* client_finished_label */
176         0,      /* client_finished_label_len */
177         NULL,   /* server_finished_label */
178         0,      /* server_finished_label_len */
179         (int (*)(int))ssl_undefined_function
180         };
181
182 int SSL_clear(SSL *s)
183         {
184
185         if (s->method == NULL)
186                 {
187                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
188                 return(0);
189                 }
190
191         if (ssl_clear_bad_session(s))
192                 {
193                 SSL_SESSION_free(s->session);
194                 s->session=NULL;
195                 }
196
197         s->error=0;
198         s->hit=0;
199         s->shutdown=0;
200
201 #if 0 /* Disabled since version 1.10 of this file (early return not
202        * needed because SSL_clear is not called when doing renegotiation) */
203         /* This is set if we are doing dynamic renegotiation so keep
204          * the old cipher.  It is sort of a SSL_clear_lite :-) */
205         if (s->new_session) return(1);
206 #else
207         if (s->new_session)
208                 {
209                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
210                 return 0;
211                 }
212 #endif
213
214         s->type=0;
215
216         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
217
218         s->version=s->method->version;
219         s->client_version=s->version;
220         s->rwstate=SSL_NOTHING;
221         s->rstate=SSL_ST_READ_HEADER;
222 #if 0
223         s->read_ahead=s->ctx->read_ahead;
224 #endif
225
226         if (s->init_buf != NULL)
227                 {
228                 BUF_MEM_free(s->init_buf);
229                 s->init_buf=NULL;
230                 }
231
232         ssl_clear_cipher_ctx(s);
233         ssl_clear_hash_ctx(&s->read_hash);
234         ssl_clear_hash_ctx(&s->write_hash);
235
236         s->first_packet=0;
237
238 #if 1
239         /* Check to see if we were changed into a different method, if
240          * so, revert back if we are not doing session-id reuse. */
241         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
242                 {
243                 s->method->ssl_free(s);
244                 s->method=s->ctx->method;
245                 if (!s->method->ssl_new(s))
246                         return(0);
247                 }
248         else
249 #endif
250                 s->method->ssl_clear(s);
251         return(1);
252         }
253
254 /** Used to change an SSL_CTXs default SSL method type */
255 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
256         {
257         STACK_OF(SSL_CIPHER) *sk;
258
259         ctx->method=meth;
260
261         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
262                 &(ctx->cipher_list_by_id),
263                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
264         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
265                 {
266                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
267                 return(0);
268                 }
269         return(1);
270         }
271
272 SSL *SSL_new(SSL_CTX *ctx)
273         {
274         SSL *s;
275
276         if (ctx == NULL)
277                 {
278                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
279                 return(NULL);
280                 }
281         if (ctx->method == NULL)
282                 {
283                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
284                 return(NULL);
285                 }
286
287         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
288         if (s == NULL) goto err;
289         memset(s,0,sizeof(SSL));
290
291 #ifndef OPENSSL_NO_KRB5
292         s->kssl_ctx = kssl_ctx_new();
293 #endif  /* OPENSSL_NO_KRB5 */
294
295         s->options=ctx->options;
296         s->mode=ctx->mode;
297         s->max_cert_list=ctx->max_cert_list;
298
299         if (ctx->cert != NULL)
300                 {
301                 /* Earlier library versions used to copy the pointer to
302                  * the CERT, not its contents; only when setting new
303                  * parameters for the per-SSL copy, ssl_cert_new would be
304                  * called (and the direct reference to the per-SSL_CTX
305                  * settings would be lost, but those still were indirectly
306                  * accessed for various purposes, and for that reason they
307                  * used to be known as s->ctx->default_cert).
308                  * Now we don't look at the SSL_CTX's CERT after having
309                  * duplicated it once. */
310
311                 s->cert = ssl_cert_dup(ctx->cert);
312                 if (s->cert == NULL)
313                         goto err;
314                 }
315         else
316                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
317
318         s->read_ahead=ctx->read_ahead;
319         s->msg_callback=ctx->msg_callback;
320         s->msg_callback_arg=ctx->msg_callback_arg;
321         s->verify_mode=ctx->verify_mode;
322 #if 0
323         s->verify_depth=ctx->verify_depth;
324 #endif
325         s->sid_ctx_length=ctx->sid_ctx_length;
326         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
327         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
328         s->verify_callback=ctx->default_verify_callback;
329         s->generate_session_id=ctx->generate_session_id;
330
331         s->param = X509_VERIFY_PARAM_new();
332         if (!s->param)
333                 goto err;
334         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
335 #if 0
336         s->purpose = ctx->purpose;
337         s->trust = ctx->trust;
338 #endif
339         s->quiet_shutdown=ctx->quiet_shutdown;
340         s->max_send_fragment = ctx->max_send_fragment;
341
342         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
343         s->ctx=ctx;
344 #ifndef OPENSSL_NO_TLSEXT
345         s->tlsext_debug_cb = 0;
346         s->tlsext_debug_arg = NULL;
347         s->tlsext_ticket_expected = 0;
348         s->tlsext_status_type = -1;
349         s->tlsext_status_expected = 0;
350         s->tlsext_ocsp_ids = NULL;
351         s->tlsext_ocsp_exts = NULL;
352         s->tlsext_ocsp_resp = NULL;
353         s->tlsext_ocsp_resplen = -1;
354         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
355         s->initial_ctx=ctx;
356 #endif
357
358         s->verify_result=X509_V_OK;
359
360         s->method=ctx->method;
361
362         if (!s->method->ssl_new(s))
363                 goto err;
364
365         s->references=1;
366         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
367
368         SSL_clear(s);
369
370         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
371
372 #ifndef OPENSSL_NO_PSK
373         s->psk_client_callback=ctx->psk_client_callback;
374         s->psk_server_callback=ctx->psk_server_callback;
375 #endif
376
377         return(s);
378 err:
379         if (s != NULL)
380                 {
381                 if (s->cert != NULL)
382                         ssl_cert_free(s->cert);
383                 if (s->ctx != NULL)
384                         SSL_CTX_free(s->ctx); /* decrement reference count */
385                 OPENSSL_free(s);
386                 }
387         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
388         return(NULL);
389         }
390
391 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
392                                    unsigned int sid_ctx_len)
393     {
394     if(sid_ctx_len > sizeof ctx->sid_ctx)
395         {
396         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
397         return 0;
398         }
399     ctx->sid_ctx_length=sid_ctx_len;
400     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
401
402     return 1;
403     }
404
405 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
406                                unsigned int sid_ctx_len)
407     {
408     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
409         {
410         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
411         return 0;
412         }
413     ssl->sid_ctx_length=sid_ctx_len;
414     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
415
416     return 1;
417     }
418
419 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
420         {
421         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
422         ctx->generate_session_id = cb;
423         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
424         return 1;
425         }
426
427 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
428         {
429         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
430         ssl->generate_session_id = cb;
431         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
432         return 1;
433         }
434
435 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
436                                 unsigned int id_len)
437         {
438         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
439          * we can "construct" a session to give us the desired check - ie. to
440          * find if there's a session in the hash table that would conflict with
441          * any new session built out of this id/id_len and the ssl_version in
442          * use by this SSL. */
443         SSL_SESSION r, *p;
444
445         if(id_len > sizeof r.session_id)
446                 return 0;
447
448         r.ssl_version = ssl->version;
449         r.session_id_length = id_len;
450         memcpy(r.session_id, id, id_len);
451         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
452          * callback is calling us to check the uniqueness of a shorter ID, it
453          * must be compared as a padded-out ID because that is what it will be
454          * converted to when the callback has finished choosing it. */
455         if((r.ssl_version == SSL2_VERSION) &&
456                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
457                 {
458                 memset(r.session_id + id_len, 0,
459                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
460                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
461                 }
462
463         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
464         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
465         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
466         return (p != NULL);
467         }
468
469 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
470         {
471         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
472         }
473
474 int SSL_set_purpose(SSL *s, int purpose)
475         {
476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
477         }
478
479 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
480         {
481         return X509_VERIFY_PARAM_set_trust(s->param, trust);
482         }
483
484 int SSL_set_trust(SSL *s, int trust)
485         {
486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
487         }
488
489 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
490         {
491         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
492         }
493
494 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
495         {
496         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
497         }
498
499 void SSL_free(SSL *s)
500         {
501         int i;
502
503         if(s == NULL)
504             return;
505
506         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
507 #ifdef REF_PRINT
508         REF_PRINT("SSL",s);
509 #endif
510         if (i > 0) return;
511 #ifdef REF_CHECK
512         if (i < 0)
513                 {
514                 fprintf(stderr,"SSL_free, bad reference count\n");
515                 abort(); /* ok */
516                 }
517 #endif
518
519         if (s->param)
520                 X509_VERIFY_PARAM_free(s->param);
521
522         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
523
524         if (s->bbio != NULL)
525                 {
526                 /* If the buffering BIO is in place, pop it off */
527                 if (s->bbio == s->wbio)
528                         {
529                         s->wbio=BIO_pop(s->wbio);
530                         }
531                 BIO_free(s->bbio);
532                 s->bbio=NULL;
533                 }
534         if (s->rbio != NULL)
535                 BIO_free_all(s->rbio);
536         if ((s->wbio != NULL) && (s->wbio != s->rbio))
537                 BIO_free_all(s->wbio);
538
539         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
540
541         /* add extra stuff */
542         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
543         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
544
545         /* Make the next call work :-) */
546         if (s->session != NULL)
547                 {
548                 ssl_clear_bad_session(s);
549                 SSL_SESSION_free(s->session);
550                 }
551
552         ssl_clear_cipher_ctx(s);
553         ssl_clear_hash_ctx(&s->read_hash);
554         ssl_clear_hash_ctx(&s->write_hash);
555
556         if (s->cert != NULL) ssl_cert_free(s->cert);
557         /* Free up if allocated */
558
559 #ifndef OPENSSL_NO_TLSEXT
560         if (s->tlsext_hostname)
561                 OPENSSL_free(s->tlsext_hostname);
562         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
563 #ifndef OPENSSL_NO_EC
564         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
565         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
566 #endif /* OPENSSL_NO_EC */
567         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
568         if (s->tlsext_ocsp_exts)
569                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
570                                                 X509_EXTENSION_free);
571         if (s->tlsext_ocsp_ids)
572                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
573         if (s->tlsext_ocsp_resp)
574                 OPENSSL_free(s->tlsext_ocsp_resp);
575 #endif
576
577         if (s->client_CA != NULL)
578                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
579
580         if (s->method != NULL) s->method->ssl_free(s);
581
582         if (s->ctx) SSL_CTX_free(s->ctx);
583
584 #ifndef OPENSSL_NO_KRB5
585         if (s->kssl_ctx != NULL)
586                 kssl_ctx_free(s->kssl_ctx);
587 #endif  /* OPENSSL_NO_KRB5 */
588
589         OPENSSL_free(s);
590         }
591
592 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
593         {
594         /* If the output buffering BIO is still in place, remove it
595          */
596         if (s->bbio != NULL)
597                 {
598                 if (s->wbio == s->bbio)
599                         {
600                         s->wbio=s->wbio->next_bio;
601                         s->bbio->next_bio=NULL;
602                         }
603                 }
604         if ((s->rbio != NULL) && (s->rbio != rbio))
605                 BIO_free_all(s->rbio);
606         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
607                 BIO_free_all(s->wbio);
608         s->rbio=rbio;
609         s->wbio=wbio;
610         }
611
612 BIO *SSL_get_rbio(const SSL *s)
613         { return(s->rbio); }
614
615 BIO *SSL_get_wbio(const SSL *s)
616         { return(s->wbio); }
617
618 int SSL_get_fd(const SSL *s)
619         {
620         return(SSL_get_rfd(s));
621         }
622
623 int SSL_get_rfd(const SSL *s)
624         {
625         int ret= -1;
626         BIO *b,*r;
627
628         b=SSL_get_rbio(s);
629         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
630         if (r != NULL)
631                 BIO_get_fd(r,&ret);
632         return(ret);
633         }
634
635 int SSL_get_wfd(const SSL *s)
636         {
637         int ret= -1;
638         BIO *b,*r;
639
640         b=SSL_get_wbio(s);
641         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
642         if (r != NULL)
643                 BIO_get_fd(r,&ret);
644         return(ret);
645         }
646
647 #ifndef OPENSSL_NO_SOCK
648 int SSL_set_fd(SSL *s,int fd)
649         {
650         int ret=0;
651         BIO *bio=NULL;
652
653         bio=BIO_new(BIO_s_socket());
654
655         if (bio == NULL)
656                 {
657                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
658                 goto err;
659                 }
660         BIO_set_fd(bio,fd,BIO_NOCLOSE);
661         SSL_set_bio(s,bio,bio);
662         ret=1;
663 err:
664         return(ret);
665         }
666
667 int SSL_set_wfd(SSL *s,int fd)
668         {
669         int ret=0;
670         BIO *bio=NULL;
671
672         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
673                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
674                 {
675                 bio=BIO_new(BIO_s_socket());
676
677                 if (bio == NULL)
678                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
679                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
680                 SSL_set_bio(s,SSL_get_rbio(s),bio);
681                 }
682         else
683                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
684         ret=1;
685 err:
686         return(ret);
687         }
688
689 int SSL_set_rfd(SSL *s,int fd)
690         {
691         int ret=0;
692         BIO *bio=NULL;
693
694         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
695                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
696                 {
697                 bio=BIO_new(BIO_s_socket());
698
699                 if (bio == NULL)
700                         {
701                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
702                         goto err;
703                         }
704                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
705                 SSL_set_bio(s,bio,SSL_get_wbio(s));
706                 }
707         else
708                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
709         ret=1;
710 err:
711         return(ret);
712         }
713 #endif
714
715
716 /* return length of latest Finished message we sent, copy to 'buf' */
717 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
718         {
719         size_t ret = 0;
720         
721         if (s->s3 != NULL)
722                 {
723                 ret = s->s3->tmp.finish_md_len;
724                 if (count > ret)
725                         count = ret;
726                 memcpy(buf, s->s3->tmp.finish_md, count);
727                 }
728         return ret;
729         }
730
731 /* return length of latest Finished message we expected, copy to 'buf' */
732 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
733         {
734         size_t ret = 0;
735         
736         if (s->s3 != NULL)
737                 {
738                 ret = s->s3->tmp.peer_finish_md_len;
739                 if (count > ret)
740                         count = ret;
741                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
742                 }
743         return ret;
744         }
745
746
747 int SSL_get_verify_mode(const SSL *s)
748         {
749         return(s->verify_mode);
750         }
751
752 int SSL_get_verify_depth(const SSL *s)
753         {
754         return X509_VERIFY_PARAM_get_depth(s->param);
755         }
756
757 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
758         {
759         return(s->verify_callback);
760         }
761
762 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
763         {
764         return(ctx->verify_mode);
765         }
766
767 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
768         {
769         return X509_VERIFY_PARAM_get_depth(ctx->param);
770         }
771
772 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
773         {
774         return(ctx->default_verify_callback);
775         }
776
777 void SSL_set_verify(SSL *s,int mode,
778                     int (*callback)(int ok,X509_STORE_CTX *ctx))
779         {
780         s->verify_mode=mode;
781         if (callback != NULL)
782                 s->verify_callback=callback;
783         }
784
785 void SSL_set_verify_depth(SSL *s,int depth)
786         {
787         X509_VERIFY_PARAM_set_depth(s->param, depth);
788         }
789
790 void SSL_set_read_ahead(SSL *s,int yes)
791         {
792         s->read_ahead=yes;
793         }
794
795 int SSL_get_read_ahead(const SSL *s)
796         {
797         return(s->read_ahead);
798         }
799
800 int SSL_pending(const SSL *s)
801         {
802         /* SSL_pending cannot work properly if read-ahead is enabled
803          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
804          * and it is impossible to fix since SSL_pending cannot report
805          * errors that may be observed while scanning the new data.
806          * (Note that SSL_pending() is often used as a boolean value,
807          * so we'd better not return -1.)
808          */
809         return(s->method->ssl_pending(s));
810         }
811
812 X509 *SSL_get_peer_certificate(const SSL *s)
813         {
814         X509 *r;
815         
816         if ((s == NULL) || (s->session == NULL))
817                 r=NULL;
818         else
819                 r=s->session->peer;
820
821         if (r == NULL) return(r);
822
823         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
824
825         return(r);
826         }
827
828 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
829         {
830         STACK_OF(X509) *r;
831         
832         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
833                 r=NULL;
834         else
835                 r=s->session->sess_cert->cert_chain;
836
837         /* If we are a client, cert_chain includes the peer's own
838          * certificate; if we are a server, it does not. */
839         
840         return(r);
841         }
842
843 /* Now in theory, since the calling process own 't' it should be safe to
844  * modify.  We need to be able to read f without being hassled */
845 void SSL_copy_session_id(SSL *t,const SSL *f)
846         {
847         CERT *tmp;
848
849         /* Do we need to to SSL locking? */
850         SSL_set_session(t,SSL_get_session(f));
851
852         /* what if we are setup as SSLv2 but want to talk SSLv3 or
853          * vice-versa */
854         if (t->method != f->method)
855                 {
856                 t->method->ssl_free(t); /* cleanup current */
857                 t->method=f->method;    /* change method */
858                 t->method->ssl_new(t);  /* setup new */
859                 }
860
861         tmp=t->cert;
862         if (f->cert != NULL)
863                 {
864                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
865                 t->cert=f->cert;
866                 }
867         else
868                 t->cert=NULL;
869         if (tmp != NULL) ssl_cert_free(tmp);
870         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
871         }
872
873 /* Fix this so it checks all the valid key/cert options */
874 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
875         {
876         if (    (ctx == NULL) ||
877                 (ctx->cert == NULL) ||
878                 (ctx->cert->key->x509 == NULL))
879                 {
880                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
881                 return(0);
882                 }
883         if      (ctx->cert->key->privatekey == NULL)
884                 {
885                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
886                 return(0);
887                 }
888         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
889         }
890
891 /* Fix this function so that it takes an optional type parameter */
892 int SSL_check_private_key(const SSL *ssl)
893         {
894         if (ssl == NULL)
895                 {
896                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
897                 return(0);
898                 }
899         if (ssl->cert == NULL)
900                 {
901                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
902                 return 0;
903                 }
904         if (ssl->cert->key->x509 == NULL)
905                 {
906                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
907                 return(0);
908                 }
909         if (ssl->cert->key->privatekey == NULL)
910                 {
911                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
912                 return(0);
913                 }
914         return(X509_check_private_key(ssl->cert->key->x509,
915                 ssl->cert->key->privatekey));
916         }
917
918 int SSL_accept(SSL *s)
919         {
920         if (s->handshake_func == 0)
921                 /* Not properly initialized yet */
922                 SSL_set_accept_state(s);
923
924         return(s->method->ssl_accept(s));
925         }
926
927 int SSL_connect(SSL *s)
928         {
929         if (s->handshake_func == 0)
930                 /* Not properly initialized yet */
931                 SSL_set_connect_state(s);
932
933         return(s->method->ssl_connect(s));
934         }
935
936 long SSL_get_default_timeout(const SSL *s)
937         {
938         return(s->method->get_timeout());
939         }
940
941 int SSL_read(SSL *s,void *buf,int num)
942         {
943         if (s->handshake_func == 0)
944                 {
945                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
946                 return -1;
947                 }
948
949         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
950                 {
951                 s->rwstate=SSL_NOTHING;
952                 return(0);
953                 }
954         return(s->method->ssl_read(s,buf,num));
955         }
956
957 int SSL_peek(SSL *s,void *buf,int num)
958         {
959         if (s->handshake_func == 0)
960                 {
961                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
962                 return -1;
963                 }
964
965         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
966                 {
967                 return(0);
968                 }
969         return(s->method->ssl_peek(s,buf,num));
970         }
971
972 int SSL_write(SSL *s,const void *buf,int num)
973         {
974         if (s->handshake_func == 0)
975                 {
976                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
977                 return -1;
978                 }
979
980         if (s->shutdown & SSL_SENT_SHUTDOWN)
981                 {
982                 s->rwstate=SSL_NOTHING;
983                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
984                 return(-1);
985                 }
986         return(s->method->ssl_write(s,buf,num));
987         }
988
989 int SSL_shutdown(SSL *s)
990         {
991         /* Note that this function behaves differently from what one might
992          * expect.  Return values are 0 for no success (yet),
993          * 1 for success; but calling it once is usually not enough,
994          * even if blocking I/O is used (see ssl3_shutdown).
995          */
996
997         if (s->handshake_func == 0)
998                 {
999                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1000                 return -1;
1001                 }
1002
1003         if ((s != NULL) && !SSL_in_init(s))
1004                 return(s->method->ssl_shutdown(s));
1005         else
1006                 return(1);
1007         }
1008
1009 int SSL_renegotiate(SSL *s)
1010         {
1011         if (s->new_session == 0)
1012                 {
1013                 s->new_session=1;
1014                 }
1015         return(s->method->ssl_renegotiate(s));
1016         }
1017
1018 int SSL_renegotiate_pending(SSL *s)
1019         {
1020         /* becomes true when negotiation is requested;
1021          * false again once a handshake has finished */
1022         return (s->new_session != 0);
1023         }
1024
1025 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1026         {
1027         long l;
1028
1029         switch (cmd)
1030                 {
1031         case SSL_CTRL_GET_READ_AHEAD:
1032                 return(s->read_ahead);
1033         case SSL_CTRL_SET_READ_AHEAD:
1034                 l=s->read_ahead;
1035                 s->read_ahead=larg;
1036                 return(l);
1037
1038         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1039                 s->msg_callback_arg = parg;
1040                 return 1;
1041
1042         case SSL_CTRL_OPTIONS:
1043                 return(s->options|=larg);
1044         case SSL_CTRL_CLEAR_OPTIONS:
1045                 return(s->options&=~larg);
1046         case SSL_CTRL_MODE:
1047                 return(s->mode|=larg);
1048         case SSL_CTRL_CLEAR_MODE:
1049                 return(s->mode &=~larg);
1050         case SSL_CTRL_GET_MAX_CERT_LIST:
1051                 return(s->max_cert_list);
1052         case SSL_CTRL_SET_MAX_CERT_LIST:
1053                 l=s->max_cert_list;
1054                 s->max_cert_list=larg;
1055                 return(l);
1056         case SSL_CTRL_SET_MTU:
1057                 if (SSL_version(s) == DTLS1_VERSION ||
1058                     SSL_version(s) == DTLS1_BAD_VER)
1059                         {
1060                         s->d1->mtu = larg;
1061                         return larg;
1062                         }
1063                 return 0;
1064         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1065                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1066                         return 0;
1067                 s->max_send_fragment = larg;
1068                 return 1;
1069         case SSL_CTRL_GET_RI_SUPPORT:
1070                 if (s->s3)
1071                         return s->s3->send_connection_binding;
1072                 else return 0;
1073         default:
1074                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1075                 }
1076         }
1077
1078 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1079         {
1080         switch(cmd)
1081                 {
1082         case SSL_CTRL_SET_MSG_CALLBACK:
1083                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1084                 return 1;
1085                 
1086         default:
1087                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1088                 }
1089         }
1090
1091 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1092         {
1093         return ctx->sessions;
1094         }
1095
1096 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1097         {
1098         long l;
1099
1100         switch (cmd)
1101                 {
1102         case SSL_CTRL_GET_READ_AHEAD:
1103                 return(ctx->read_ahead);
1104         case SSL_CTRL_SET_READ_AHEAD:
1105                 l=ctx->read_ahead;
1106                 ctx->read_ahead=larg;
1107                 return(l);
1108                 
1109         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1110                 ctx->msg_callback_arg = parg;
1111                 return 1;
1112
1113         case SSL_CTRL_GET_MAX_CERT_LIST:
1114                 return(ctx->max_cert_list);
1115         case SSL_CTRL_SET_MAX_CERT_LIST:
1116                 l=ctx->max_cert_list;
1117                 ctx->max_cert_list=larg;
1118                 return(l);
1119
1120         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1121                 l=ctx->session_cache_size;
1122                 ctx->session_cache_size=larg;
1123                 return(l);
1124         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1125                 return(ctx->session_cache_size);
1126         case SSL_CTRL_SET_SESS_CACHE_MODE:
1127                 l=ctx->session_cache_mode;
1128                 ctx->session_cache_mode=larg;
1129                 return(l);
1130         case SSL_CTRL_GET_SESS_CACHE_MODE:
1131                 return(ctx->session_cache_mode);
1132
1133         case SSL_CTRL_SESS_NUMBER:
1134                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1135         case SSL_CTRL_SESS_CONNECT:
1136                 return(ctx->stats.sess_connect);
1137         case SSL_CTRL_SESS_CONNECT_GOOD:
1138                 return(ctx->stats.sess_connect_good);
1139         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1140                 return(ctx->stats.sess_connect_renegotiate);
1141         case SSL_CTRL_SESS_ACCEPT:
1142                 return(ctx->stats.sess_accept);
1143         case SSL_CTRL_SESS_ACCEPT_GOOD:
1144                 return(ctx->stats.sess_accept_good);
1145         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1146                 return(ctx->stats.sess_accept_renegotiate);
1147         case SSL_CTRL_SESS_HIT:
1148                 return(ctx->stats.sess_hit);
1149         case SSL_CTRL_SESS_CB_HIT:
1150                 return(ctx->stats.sess_cb_hit);
1151         case SSL_CTRL_SESS_MISSES:
1152                 return(ctx->stats.sess_miss);
1153         case SSL_CTRL_SESS_TIMEOUTS:
1154                 return(ctx->stats.sess_timeout);
1155         case SSL_CTRL_SESS_CACHE_FULL:
1156                 return(ctx->stats.sess_cache_full);
1157         case SSL_CTRL_OPTIONS:
1158                 return(ctx->options|=larg);
1159         case SSL_CTRL_CLEAR_OPTIONS:
1160                 return(ctx->options&=~larg);
1161         case SSL_CTRL_MODE:
1162                 return(ctx->mode|=larg);
1163         case SSL_CTRL_CLEAR_MODE:
1164                 return(ctx->mode&=~larg);
1165         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1166                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1167                         return 0;
1168                 ctx->max_send_fragment = larg;
1169                 return 1;
1170         default:
1171                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1172                 }
1173         }
1174
1175 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1176         {
1177         switch(cmd)
1178                 {
1179         case SSL_CTRL_SET_MSG_CALLBACK:
1180                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1181                 return 1;
1182
1183         default:
1184                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1185                 }
1186         }
1187
1188 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1189         {
1190         long l;
1191
1192         l=a->id-b->id;
1193         if (l == 0L)
1194                 return(0);
1195         else
1196                 return((l > 0)?1:-1);
1197         }
1198
1199 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1200                         const SSL_CIPHER * const *bp)
1201         {
1202         long l;
1203
1204         l=(*ap)->id-(*bp)->id;
1205         if (l == 0L)
1206                 return(0);
1207         else
1208                 return((l > 0)?1:-1);
1209         }
1210
1211 /** return a STACK of the ciphers available for the SSL and in order of
1212  * preference */
1213 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1214         {
1215         if (s != NULL)
1216                 {
1217                 if (s->cipher_list != NULL)
1218                         {
1219                         return(s->cipher_list);
1220                         }
1221                 else if ((s->ctx != NULL) &&
1222                         (s->ctx->cipher_list != NULL))
1223                         {
1224                         return(s->ctx->cipher_list);
1225                         }
1226                 }
1227         return(NULL);
1228         }
1229
1230 /** return a STACK of the ciphers available for the SSL and in order of
1231  * algorithm id */
1232 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1233         {
1234         if (s != NULL)
1235                 {
1236                 if (s->cipher_list_by_id != NULL)
1237                         {
1238                         return(s->cipher_list_by_id);
1239                         }
1240                 else if ((s->ctx != NULL) &&
1241                         (s->ctx->cipher_list_by_id != NULL))
1242                         {
1243                         return(s->ctx->cipher_list_by_id);
1244                         }
1245                 }
1246         return(NULL);
1247         }
1248
1249 /** The old interface to get the same thing as SSL_get_ciphers() */
1250 const char *SSL_get_cipher_list(const SSL *s,int n)
1251         {
1252         SSL_CIPHER *c;
1253         STACK_OF(SSL_CIPHER) *sk;
1254
1255         if (s == NULL) return(NULL);
1256         sk=SSL_get_ciphers(s);
1257         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1258                 return(NULL);
1259         c=sk_SSL_CIPHER_value(sk,n);
1260         if (c == NULL) return(NULL);
1261         return(c->name);
1262         }
1263
1264 /** specify the ciphers to be used by default by the SSL_CTX */
1265 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1266         {
1267         STACK_OF(SSL_CIPHER) *sk;
1268         
1269         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1270                 &ctx->cipher_list_by_id,str);
1271         /* ssl_create_cipher_list may return an empty stack if it
1272          * was unable to find a cipher matching the given rule string
1273          * (for example if the rule string specifies a cipher which
1274          * has been disabled). This is not an error as far as
1275          * ssl_create_cipher_list is concerned, and hence
1276          * ctx->cipher_list and ctx->cipher_list_by_id has been
1277          * updated. */
1278         if (sk == NULL)
1279                 return 0;
1280         else if (sk_SSL_CIPHER_num(sk) == 0)
1281                 {
1282                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1283                 return 0;
1284                 }
1285         return 1;
1286         }
1287
1288 /** specify the ciphers to be used by the SSL */
1289 int SSL_set_cipher_list(SSL *s,const char *str)
1290         {
1291         STACK_OF(SSL_CIPHER) *sk;
1292         
1293         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1294                 &s->cipher_list_by_id,str);
1295         /* see comment in SSL_CTX_set_cipher_list */
1296         if (sk == NULL)
1297                 return 0;
1298         else if (sk_SSL_CIPHER_num(sk) == 0)
1299                 {
1300                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1301                 return 0;
1302                 }
1303         return 1;
1304         }
1305
1306 /* works well for SSLv2, not so good for SSLv3 */
1307 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1308         {
1309         char *p;
1310         STACK_OF(SSL_CIPHER) *sk;
1311         SSL_CIPHER *c;
1312         int i;
1313
1314         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1315                 (len < 2))
1316                 return(NULL);
1317
1318         p=buf;
1319         sk=s->session->ciphers;
1320         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1321                 {
1322                 int n;
1323
1324                 c=sk_SSL_CIPHER_value(sk,i);
1325                 n=strlen(c->name);
1326                 if (n+1 > len)
1327                         {
1328                         if (p != buf)
1329                                 --p;
1330                         *p='\0';
1331                         return buf;
1332                         }
1333                 strcpy(p,c->name);
1334                 p+=n;
1335                 *(p++)=':';
1336                 len-=n+1;
1337                 }
1338         p[-1]='\0';
1339         return(buf);
1340         }
1341
1342 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1343                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1344         {
1345         int i,j=0;
1346         SSL_CIPHER *c;
1347         unsigned char *q;
1348 #ifndef OPENSSL_NO_KRB5
1349         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1350 #endif /* OPENSSL_NO_KRB5 */
1351
1352         if (sk == NULL) return(0);
1353         q=p;
1354
1355         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1356                 {
1357                 c=sk_SSL_CIPHER_value(sk,i);
1358 #ifndef OPENSSL_NO_KRB5
1359                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1360                     nokrb5)
1361                     continue;
1362 #endif /* OPENSSL_NO_KRB5 */
1363 #ifndef OPENSSL_NO_PSK
1364                 /* with PSK there must be client callback set */
1365                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1366                     s->psk_client_callback == NULL)
1367                         continue;
1368 #endif /* OPENSSL_NO_PSK */
1369                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1370                 p+=j;
1371                 }
1372         /* If p == q, no ciphers and caller indicates an error. Otherwise
1373          * add SCSV if no extensions (i.e. SSL3 is client_version)
1374          * since spec RECOMMENDS not sending both RI and SCSV.
1375          */
1376         if (p != q && !s->new_session && s->client_version == SSL3_VERSION)
1377                 {
1378                 static SSL_CIPHER scsv =
1379                         {
1380                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1381                         };
1382                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1383                 p+=j;
1384 #ifdef OPENSSL_RI_DEBUG
1385                 fprintf(stderr, "SCSV sent by client\n");
1386 #endif
1387                 }
1388
1389         return(p-q);
1390         }
1391
1392 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1393                                                STACK_OF(SSL_CIPHER) **skp)
1394         {
1395         const SSL_CIPHER *c;
1396         STACK_OF(SSL_CIPHER) *sk;
1397         int i,n;
1398         if (s->s3)
1399                 s->s3->send_connection_binding = 0;
1400
1401         n=ssl_put_cipher_by_char(s,NULL,NULL);
1402         if ((num%n) != 0)
1403                 {
1404                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1405                 return(NULL);
1406                 }
1407         if ((skp == NULL) || (*skp == NULL))
1408                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1409         else
1410                 {
1411                 sk= *skp;
1412                 sk_SSL_CIPHER_zero(sk);
1413                 }
1414
1415         for (i=0; i<num; i+=n)
1416                 {
1417                 /* Check for SCSV */
1418                 if (s->s3 && (n != 3 || !p[0]) &&
1419                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1420                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1421                         {
1422                         /* SCSV fatal if renegotiating */
1423                         if (s->new_session)
1424                                 {
1425                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1426                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
1427                                 goto err;
1428                                 }
1429                         s->s3->send_connection_binding = 1;
1430                         p += n;
1431 #ifdef OPENSSL_RI_DEBUG
1432                         fprintf(stderr, "SCSV received by server\n");
1433 #endif
1434                         continue;
1435                         }
1436
1437                 c=ssl_get_cipher_by_char(s,p);
1438                 p+=n;
1439                 if (c != NULL)
1440                         {
1441                         if (!sk_SSL_CIPHER_push(sk,c))
1442                                 {
1443                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1444                                 goto err;
1445                                 }
1446                         }
1447                 }
1448
1449         if (skp != NULL)
1450                 *skp=sk;
1451         return(sk);
1452 err:
1453         if ((skp == NULL) || (*skp == NULL))
1454                 sk_SSL_CIPHER_free(sk);
1455         return(NULL);
1456         }
1457
1458
1459 #ifndef OPENSSL_NO_TLSEXT
1460 /** return a servername extension value if provided in Client Hello, or NULL.
1461  * So far, only host_name types are defined (RFC 3546).
1462  */
1463
1464 const char *SSL_get_servername(const SSL *s, const int type)
1465         {
1466         if (type != TLSEXT_NAMETYPE_host_name)
1467                 return NULL;
1468
1469         return s->session && !s->tlsext_hostname ?
1470                 s->session->tlsext_hostname :
1471                 s->tlsext_hostname;
1472         }
1473
1474 int SSL_get_servername_type(const SSL *s)
1475         {
1476         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1477                 return TLSEXT_NAMETYPE_host_name;
1478         return -1;
1479         }
1480 #endif
1481
1482 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1483         {
1484         unsigned long l;
1485
1486         l=(unsigned long)
1487                 ((unsigned int) a->session_id[0]     )|
1488                 ((unsigned int) a->session_id[1]<< 8L)|
1489                 ((unsigned long)a->session_id[2]<<16L)|
1490                 ((unsigned long)a->session_id[3]<<24L);
1491         return(l);
1492         }
1493
1494 /* NB: If this function (or indeed the hash function which uses a sort of
1495  * coarser function than this one) is changed, ensure
1496  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1497  * able to construct an SSL_SESSION that will collide with any existing session
1498  * with a matching session ID. */
1499 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1500         {
1501         if (a->ssl_version != b->ssl_version)
1502                 return(1);
1503         if (a->session_id_length != b->session_id_length)
1504                 return(1);
1505         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1506         }
1507
1508 /* These wrapper functions should remain rather than redeclaring
1509  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1510  * variable. The reason is that the functions aren't static, they're exposed via
1511  * ssl.h. */
1512 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1513 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1514
1515 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1516         {
1517         SSL_CTX *ret=NULL;
1518
1519         if (meth == NULL)
1520                 {
1521                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1522                 return(NULL);
1523                 }
1524
1525         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1526                 {
1527                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1528                 goto err;
1529                 }
1530         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1531         if (ret == NULL)
1532                 goto err;
1533
1534         memset(ret,0,sizeof(SSL_CTX));
1535
1536         ret->method=meth;
1537
1538         ret->cert_store=NULL;
1539         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1540         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1541         ret->session_cache_head=NULL;
1542         ret->session_cache_tail=NULL;
1543
1544         /* We take the system default */
1545         ret->session_timeout=meth->get_timeout();
1546
1547         ret->new_session_cb=0;
1548         ret->remove_session_cb=0;
1549         ret->get_session_cb=0;
1550         ret->generate_session_id=0;
1551
1552         memset((char *)&ret->stats,0,sizeof(ret->stats));
1553
1554         ret->references=1;
1555         ret->quiet_shutdown=0;
1556
1557 /*      ret->cipher=NULL;*/
1558 /*      ret->s2->challenge=NULL;
1559         ret->master_key=NULL;
1560         ret->key_arg=NULL;
1561         ret->s2->conn_id=NULL; */
1562
1563         ret->info_callback=NULL;
1564
1565         ret->app_verify_callback=0;
1566         ret->app_verify_arg=NULL;
1567
1568         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1569         ret->read_ahead=0;
1570         ret->msg_callback=0;
1571         ret->msg_callback_arg=NULL;
1572         ret->verify_mode=SSL_VERIFY_NONE;
1573 #if 0
1574         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1575 #endif
1576         ret->sid_ctx_length=0;
1577         ret->default_verify_callback=NULL;
1578         if ((ret->cert=ssl_cert_new()) == NULL)
1579                 goto err;
1580
1581         ret->default_passwd_callback=0;
1582         ret->default_passwd_callback_userdata=NULL;
1583         ret->client_cert_cb=0;
1584         ret->app_gen_cookie_cb=0;
1585         ret->app_verify_cookie_cb=0;
1586
1587         ret->sessions=lh_SSL_SESSION_new();
1588         if (ret->sessions == NULL) goto err;
1589         ret->cert_store=X509_STORE_new();
1590         if (ret->cert_store == NULL) goto err;
1591
1592         ssl_create_cipher_list(ret->method,
1593                 &ret->cipher_list,&ret->cipher_list_by_id,
1594                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1595         if (ret->cipher_list == NULL
1596             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1597                 {
1598                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1599                 goto err2;
1600                 }
1601
1602         ret->param = X509_VERIFY_PARAM_new();
1603         if (!ret->param)
1604                 goto err;
1605
1606         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1607                 {
1608                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1609                 goto err2;
1610                 }
1611         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1612                 {
1613                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1614                 goto err2;
1615                 }
1616         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1617                 {
1618                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1619                 goto err2;
1620                 }
1621
1622         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1623                 goto err;
1624
1625         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1626
1627         ret->extra_certs=NULL;
1628         ret->comp_methods=SSL_COMP_get_compression_methods();
1629
1630         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1631
1632 #ifndef OPENSSL_NO_TLSEXT
1633         ret->tlsext_servername_callback = 0;
1634         ret->tlsext_servername_arg = NULL;
1635         /* Setup RFC4507 ticket keys */
1636         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1637                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1638                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1639                 ret->options |= SSL_OP_NO_TICKET;
1640
1641         ret->tlsext_status_cb = 0;
1642         ret->tlsext_status_arg = NULL;
1643
1644 #endif
1645 #ifndef OPENSSL_NO_PSK
1646         ret->psk_identity_hint=NULL;
1647         ret->psk_client_callback=NULL;
1648         ret->psk_server_callback=NULL;
1649 #endif
1650 #ifndef OPENSSL_NO_BUF_FREELISTS
1651         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1652         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1653         if (!ret->rbuf_freelist)
1654                 goto err;
1655         ret->rbuf_freelist->chunklen = 0;
1656         ret->rbuf_freelist->len = 0;
1657         ret->rbuf_freelist->head = NULL;
1658         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1659         if (!ret->wbuf_freelist)
1660                 {
1661                 OPENSSL_free(ret->rbuf_freelist);
1662                 goto err;
1663                 }
1664         ret->wbuf_freelist->chunklen = 0;
1665         ret->wbuf_freelist->len = 0;
1666         ret->wbuf_freelist->head = NULL;
1667 #endif
1668 #ifndef OPENSSL_NO_ENGINE
1669         ret->client_cert_engine = NULL;
1670 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1671 #define eng_strx(x)     #x
1672 #define eng_str(x)      eng_strx(x)
1673         /* Use specific client engine automatically... ignore errors */
1674         {
1675         ENGINE *eng;
1676         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1677         if (!eng)
1678                 {
1679                 ERR_clear_error();
1680                 ENGINE_load_builtin_engines();
1681                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1682                 }
1683         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1684                 ERR_clear_error();
1685         }
1686 #endif
1687 #endif
1688         /* Default is to connect to non-RI servers. When RI is more widely
1689          * deployed might change this.
1690          */
1691         ret->options = SSL_OP_LEGACY_SERVER_CONNECT;
1692
1693         return(ret);
1694 err:
1695         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1696 err2:
1697         if (ret != NULL) SSL_CTX_free(ret);
1698         return(NULL);
1699         }
1700
1701 #if 0
1702 static void SSL_COMP_free(SSL_COMP *comp)
1703     { OPENSSL_free(comp); }
1704 #endif
1705
1706 #ifndef OPENSSL_NO_BUF_FREELISTS
1707 static void
1708 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1709         {
1710         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1711         for (ent = list->head; ent; ent = next)
1712                 {
1713                 next = ent->next;
1714                 OPENSSL_free(ent);
1715                 }
1716         OPENSSL_free(list);
1717         }
1718 #endif
1719
1720 void SSL_CTX_free(SSL_CTX *a)
1721         {
1722         int i;
1723
1724         if (a == NULL) return;
1725
1726         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1727 #ifdef REF_PRINT
1728         REF_PRINT("SSL_CTX",a);
1729 #endif
1730         if (i > 0) return;
1731 #ifdef REF_CHECK
1732         if (i < 0)
1733                 {
1734                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1735                 abort(); /* ok */
1736                 }
1737 #endif
1738
1739         if (a->param)
1740                 X509_VERIFY_PARAM_free(a->param);
1741
1742         /*
1743          * Free internal session cache. However: the remove_cb() may reference
1744          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1745          * after the sessions were flushed.
1746          * As the ex_data handling routines might also touch the session cache,
1747          * the most secure solution seems to be: empty (flush) the cache, then
1748          * free ex_data, then finally free the cache.
1749          * (See ticket [openssl.org #212].)
1750          */
1751         if (a->sessions != NULL)
1752                 SSL_CTX_flush_sessions(a,0);
1753
1754         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1755
1756         if (a->sessions != NULL)
1757                 lh_SSL_SESSION_free(a->sessions);
1758
1759         if (a->cert_store != NULL)
1760                 X509_STORE_free(a->cert_store);
1761         if (a->cipher_list != NULL)
1762                 sk_SSL_CIPHER_free(a->cipher_list);
1763         if (a->cipher_list_by_id != NULL)
1764                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1765         if (a->cert != NULL)
1766                 ssl_cert_free(a->cert);
1767         if (a->client_CA != NULL)
1768                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1769         if (a->extra_certs != NULL)
1770                 sk_X509_pop_free(a->extra_certs,X509_free);
1771 #if 0 /* This should never be done, since it removes a global database */
1772         if (a->comp_methods != NULL)
1773                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1774 #else
1775         a->comp_methods = NULL;
1776 #endif
1777
1778 #ifndef OPENSSL_NO_PSK
1779         if (a->psk_identity_hint)
1780                 OPENSSL_free(a->psk_identity_hint);
1781 #endif
1782 #ifndef OPENSSL_NO_ENGINE
1783         if (a->client_cert_engine)
1784                 ENGINE_finish(a->client_cert_engine);
1785 #endif
1786
1787 #ifndef OPENSSL_NO_BUF_FREELISTS
1788         if (a->wbuf_freelist)
1789                 ssl_buf_freelist_free(a->wbuf_freelist);
1790         if (a->rbuf_freelist)
1791                 ssl_buf_freelist_free(a->rbuf_freelist);
1792 #endif
1793
1794         OPENSSL_free(a);
1795         }
1796
1797 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1798         {
1799         ctx->default_passwd_callback=cb;
1800         }
1801
1802 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1803         {
1804         ctx->default_passwd_callback_userdata=u;
1805         }
1806
1807 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1808         {
1809         ctx->app_verify_callback=cb;
1810         ctx->app_verify_arg=arg;
1811         }
1812
1813 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1814         {
1815         ctx->verify_mode=mode;
1816         ctx->default_verify_callback=cb;
1817         }
1818
1819 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1820         {
1821         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1822         }
1823
1824 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1825         {
1826         CERT_PKEY *cpk;
1827         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1828         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1829         int rsa_tmp_export,dh_tmp_export,kl;
1830         unsigned long mask_k,mask_a,emask_k,emask_a;
1831         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1832 #ifndef OPENSSL_NO_ECDH
1833         int have_ecdh_tmp;
1834 #endif
1835         X509 *x = NULL;
1836         EVP_PKEY *ecc_pkey = NULL;
1837         int signature_nid = 0;
1838
1839         if (c == NULL) return;
1840
1841         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1842
1843 #ifndef OPENSSL_NO_RSA
1844         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1845         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1846                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1847 #else
1848         rsa_tmp=rsa_tmp_export=0;
1849 #endif
1850 #ifndef OPENSSL_NO_DH
1851         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1852         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1853                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1854 #else
1855         dh_tmp=dh_tmp_export=0;
1856 #endif
1857
1858 #ifndef OPENSSL_NO_ECDH
1859         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1860 #endif
1861         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1862         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1863         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1864         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1865         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1866         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1867         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1868         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1869         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1870         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1871         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1872 /* FIX THIS EAY EAY EAY */
1873         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1874         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1875         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1876         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1877         mask_k=0;
1878         mask_a=0;
1879         emask_k=0;
1880         emask_a=0;
1881
1882         
1883
1884 #ifdef CIPHER_DEBUG
1885         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1886                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1887                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1888 #endif
1889         
1890         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1891         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1892                 mask_k |= SSL_kGOST;
1893                 mask_a |= SSL_aGOST01;
1894         }
1895         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1896         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1897                 mask_k |= SSL_kGOST;
1898                 mask_a |= SSL_aGOST94;
1899         }
1900
1901         if (rsa_enc || (rsa_tmp && rsa_sign))
1902                 mask_k|=SSL_kRSA;
1903         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1904                 emask_k|=SSL_kRSA;
1905
1906 #if 0
1907         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1908         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1909                 (rsa_enc || rsa_sign || dsa_sign))
1910                 mask_k|=SSL_kEDH;
1911         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1912                 (rsa_enc || rsa_sign || dsa_sign))
1913                 emask_k|=SSL_kEDH;
1914 #endif
1915
1916         if (dh_tmp_export)
1917                 emask_k|=SSL_kEDH;
1918
1919         if (dh_tmp)
1920                 mask_k|=SSL_kEDH;
1921
1922         if (dh_rsa) mask_k|=SSL_kDHr;
1923         if (dh_rsa_export) emask_k|=SSL_kDHr;
1924
1925         if (dh_dsa) mask_k|=SSL_kDHd;
1926         if (dh_dsa_export) emask_k|=SSL_kDHd;
1927
1928         if (rsa_enc || rsa_sign)
1929                 {
1930                 mask_a|=SSL_aRSA;
1931                 emask_a|=SSL_aRSA;
1932                 }
1933
1934         if (dsa_sign)
1935                 {
1936                 mask_a|=SSL_aDSS;
1937                 emask_a|=SSL_aDSS;
1938                 }
1939
1940         mask_a|=SSL_aNULL;
1941         emask_a|=SSL_aNULL;
1942
1943 #ifndef OPENSSL_NO_KRB5
1944         mask_k|=SSL_kKRB5;
1945         mask_a|=SSL_aKRB5;
1946         emask_k|=SSL_kKRB5;
1947         emask_a|=SSL_aKRB5;
1948 #endif
1949
1950         /* An ECC certificate may be usable for ECDH and/or
1951          * ECDSA cipher suites depending on the key usage extension.
1952          */
1953         if (have_ecc_cert)
1954                 {
1955                 /* This call populates extension flags (ex_flags) */
1956                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1957                 X509_check_purpose(x, -1, 0);
1958                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1959                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1960                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1961                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1962                 ecc_pkey = X509_get_pubkey(x);
1963                 ecc_pkey_size = (ecc_pkey != NULL) ?
1964                     EVP_PKEY_bits(ecc_pkey) : 0;
1965                 EVP_PKEY_free(ecc_pkey);
1966                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1967                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1968 #ifndef OPENSSL_NO_ECDH
1969                 if (ecdh_ok)
1970                         {
1971                         const char *sig = OBJ_nid2ln(signature_nid);
1972                         if (sig == NULL)
1973                                 {
1974                                 ERR_clear_error();
1975                                 sig = "unknown";
1976                                 }
1977                                 
1978                         if (strstr(sig, "WithRSA"))
1979                                 {
1980                                 mask_k|=SSL_kECDHr;
1981                                 mask_a|=SSL_aECDH;
1982                                 if (ecc_pkey_size <= 163)
1983                                         {
1984                                         emask_k|=SSL_kECDHr;
1985                                         emask_a|=SSL_aECDH;
1986                                         }
1987                                 }
1988
1989                         if (signature_nid == NID_ecdsa_with_SHA1)
1990                                 {
1991                                 mask_k|=SSL_kECDHe;
1992                                 mask_a|=SSL_aECDH;
1993                                 if (ecc_pkey_size <= 163)
1994                                         {
1995                                         emask_k|=SSL_kECDHe;
1996                                         emask_a|=SSL_aECDH;
1997                                         }
1998                                 }
1999                         }
2000 #endif
2001 #ifndef OPENSSL_NO_ECDSA
2002                 if (ecdsa_ok)
2003                         {
2004                         mask_a|=SSL_aECDSA;
2005                         emask_a|=SSL_aECDSA;
2006                         }
2007 #endif
2008                 }
2009
2010 #ifndef OPENSSL_NO_ECDH
2011         if (have_ecdh_tmp)
2012                 {
2013                 mask_k|=SSL_kEECDH;
2014                 emask_k|=SSL_kEECDH;
2015                 }
2016 #endif
2017
2018 #ifndef OPENSSL_NO_PSK
2019         mask_k |= SSL_kPSK;
2020         mask_a |= SSL_aPSK;
2021         emask_k |= SSL_kPSK;
2022         emask_a |= SSL_aPSK;
2023 #endif
2024
2025         c->mask_k=mask_k;
2026         c->mask_a=mask_a;
2027         c->export_mask_k=emask_k;
2028         c->export_mask_a=emask_a;
2029         c->valid=1;
2030         }
2031
2032 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2033 #define ku_reject(x, usage) \
2034         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2035
2036 #ifndef OPENSSL_NO_EC
2037
2038 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
2039         {
2040         unsigned long alg_k, alg_a;
2041         EVP_PKEY *pkey = NULL;
2042         int keysize = 0;
2043         int signature_nid = 0;
2044
2045         alg_k = cs->algorithm_mkey;
2046         alg_a = cs->algorithm_auth;
2047
2048         if (SSL_C_IS_EXPORT(cs))
2049                 {
2050                 /* ECDH key length in export ciphers must be <= 163 bits */
2051                 pkey = X509_get_pubkey(x);
2052                 if (pkey == NULL) return 0;
2053                 keysize = EVP_PKEY_bits(pkey);
2054                 EVP_PKEY_free(pkey);
2055                 if (keysize > 163) return 0;
2056                 }
2057
2058         /* This call populates the ex_flags field correctly */
2059         X509_check_purpose(x, -1, 0);
2060         if ((x->sig_alg) && (x->sig_alg->algorithm))
2061                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2062         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2063                 {
2064                 /* key usage, if present, must allow key agreement */
2065                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2066                         {
2067                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2068                         return 0;
2069                         }
2070                 if (alg_k & SSL_kECDHe)
2071                         {
2072                         /* signature alg must be ECDSA */
2073                         if (signature_nid != NID_ecdsa_with_SHA1)
2074                                 {
2075                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2076                                 return 0;
2077                                 }
2078                         }
2079                 if (alg_k & SSL_kECDHr)
2080                         {
2081                         /* signature alg must be RSA */
2082
2083                         const char *sig = OBJ_nid2ln(signature_nid);
2084                         if (sig == NULL)
2085                                 {
2086                                 ERR_clear_error();
2087                                 sig = "unknown";
2088                                 }
2089                         if (strstr(sig, "WithRSA") == NULL)
2090                                 {
2091                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2092                                 return 0;
2093                                 }
2094                         }
2095                 }
2096         if (alg_a & SSL_aECDSA)
2097                 {
2098                 /* key usage, if present, must allow signing */
2099                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2100                         {
2101                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2102                         return 0;
2103                         }
2104                 }
2105
2106         return 1;  /* all checks are ok */
2107         }
2108
2109 #endif
2110
2111 /* THIS NEEDS CLEANING UP */
2112 X509 *ssl_get_server_send_cert(SSL *s)
2113         {
2114         unsigned long alg_k,alg_a,mask_k,mask_a;
2115         CERT *c;
2116         int i,is_export;
2117
2118         c=s->cert;
2119         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2120         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2121         if (is_export)
2122                 {
2123                 mask_k = c->export_mask_k;
2124                 mask_a = c->export_mask_a;
2125                 }
2126         else
2127                 {
2128                 mask_k = c->mask_k;
2129                 mask_a = c->mask_a;
2130                 }
2131         
2132         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2133         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2134
2135         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2136                 {
2137                 /* we don't need to look at SSL_kEECDH
2138                  * since no certificate is needed for
2139                  * anon ECDH and for authenticated
2140                  * EECDH, the check for the auth
2141                  * algorithm will set i correctly
2142                  * NOTE: For ECDH-RSA, we need an ECC
2143                  * not an RSA cert but for EECDH-RSA
2144                  * we need an RSA cert. Placing the
2145                  * checks for SSL_kECDH before RSA
2146                  * checks ensures the correct cert is chosen.
2147                  */
2148                 i=SSL_PKEY_ECC;
2149                 }
2150         else if (alg_a & SSL_aECDSA)
2151                 {
2152                 i=SSL_PKEY_ECC;
2153                 }
2154         else if (alg_k & SSL_kDHr)
2155                 i=SSL_PKEY_DH_RSA;
2156         else if (alg_k & SSL_kDHd)
2157                 i=SSL_PKEY_DH_DSA;
2158         else if (alg_a & SSL_aDSS)
2159                 i=SSL_PKEY_DSA_SIGN;
2160         else if (alg_a & SSL_aRSA)
2161                 {
2162                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2163                         i=SSL_PKEY_RSA_SIGN;
2164                 else
2165                         i=SSL_PKEY_RSA_ENC;
2166                 }
2167         else if (alg_a & SSL_aKRB5)
2168                 {
2169                 /* VRS something else here? */
2170                 return(NULL);
2171                 }
2172         else if (alg_a & SSL_aGOST94) 
2173                 i=SSL_PKEY_GOST94;
2174         else if (alg_a & SSL_aGOST01)
2175                 i=SSL_PKEY_GOST01;
2176         else /* if (alg_a & SSL_aNULL) */
2177                 {
2178                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2179                 return(NULL);
2180                 }
2181         if (c->pkeys[i].x509 == NULL) return(NULL);
2182
2183         return(c->pkeys[i].x509);
2184         }
2185
2186 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2187         {
2188         unsigned long alg_a;
2189         CERT *c;
2190
2191         alg_a = cipher->algorithm_auth;
2192         c=s->cert;
2193
2194         if ((alg_a & SSL_aDSS) &&
2195                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2196                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2197         else if (alg_a & SSL_aRSA)
2198                 {
2199                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2200                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2201                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2202                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2203                 else
2204                         return(NULL);
2205                 }
2206         else if ((alg_a & SSL_aECDSA) &&
2207                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2208                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2209         else /* if (alg_a & SSL_aNULL) */
2210                 {
2211                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2212                 return(NULL);
2213                 }
2214         }
2215
2216 void ssl_update_cache(SSL *s,int mode)
2217         {
2218         int i;
2219
2220         /* If the session_id_length is 0, we are not supposed to cache it,
2221          * and it would be rather hard to do anyway :-) */
2222         if (s->session->session_id_length == 0) return;
2223
2224         i=s->session_ctx->session_cache_mode;
2225         if ((i & mode) && (!s->hit)
2226                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2227                     || SSL_CTX_add_session(s->session_ctx,s->session))
2228                 && (s->session_ctx->new_session_cb != NULL))
2229                 {
2230                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2231                 if (!s->session_ctx->new_session_cb(s,s->session))
2232                         SSL_SESSION_free(s->session);
2233                 }
2234
2235         /* auto flush every 255 connections */
2236         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2237                 ((i & mode) == mode))
2238                 {
2239                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2240                         ?s->session_ctx->stats.sess_connect_good
2241                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2242                         {
2243                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2244                         }
2245                 }
2246         }
2247
2248 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2249         {
2250         return(s->method);
2251         }
2252
2253 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2254         {
2255         int conn= -1;
2256         int ret=1;
2257
2258         if (s->method != meth)
2259                 {
2260                 if (s->handshake_func != NULL)
2261                         conn=(s->handshake_func == s->method->ssl_connect);
2262
2263                 if (s->method->version == meth->version)
2264                         s->method=meth;
2265                 else
2266                         {
2267                         s->method->ssl_free(s);
2268                         s->method=meth;
2269                         ret=s->method->ssl_new(s);
2270                         }
2271
2272                 if (conn == 1)
2273                         s->handshake_func=meth->ssl_connect;
2274                 else if (conn == 0)
2275                         s->handshake_func=meth->ssl_accept;
2276                 }
2277         return(ret);
2278         }
2279
2280 int SSL_get_error(const SSL *s,int i)
2281         {
2282         int reason;
2283         unsigned long l;
2284         BIO *bio;
2285
2286         if (i > 0) return(SSL_ERROR_NONE);
2287
2288         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2289          * etc, where we do encode the error */
2290         if ((l=ERR_peek_error()) != 0)
2291                 {
2292                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2293                         return(SSL_ERROR_SYSCALL);
2294                 else
2295                         return(SSL_ERROR_SSL);
2296                 }
2297
2298         if ((i < 0) && SSL_want_read(s))
2299                 {
2300                 bio=SSL_get_rbio(s);
2301                 if (BIO_should_read(bio))
2302                         return(SSL_ERROR_WANT_READ);
2303                 else if (BIO_should_write(bio))
2304                         /* This one doesn't make too much sense ... We never try
2305                          * to write to the rbio, and an application program where
2306                          * rbio and wbio are separate couldn't even know what it
2307                          * should wait for.
2308                          * However if we ever set s->rwstate incorrectly
2309                          * (so that we have SSL_want_read(s) instead of
2310                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2311                          * this test works around that bug; so it might be safer
2312                          * to keep it. */
2313                         return(SSL_ERROR_WANT_WRITE);
2314                 else if (BIO_should_io_special(bio))
2315                         {
2316                         reason=BIO_get_retry_reason(bio);
2317                         if (reason == BIO_RR_CONNECT)
2318                                 return(SSL_ERROR_WANT_CONNECT);
2319                         else if (reason == BIO_RR_ACCEPT)
2320                                 return(SSL_ERROR_WANT_ACCEPT);
2321                         else
2322                                 return(SSL_ERROR_SYSCALL); /* unknown */
2323                         }
2324                 }
2325
2326         if ((i < 0) && SSL_want_write(s))
2327                 {
2328                 bio=SSL_get_wbio(s);
2329                 if (BIO_should_write(bio))
2330                         return(SSL_ERROR_WANT_WRITE);
2331                 else if (BIO_should_read(bio))
2332                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2333                         return(SSL_ERROR_WANT_READ);
2334                 else if (BIO_should_io_special(bio))
2335                         {
2336                         reason=BIO_get_retry_reason(bio);
2337                         if (reason == BIO_RR_CONNECT)
2338                                 return(SSL_ERROR_WANT_CONNECT);
2339                         else if (reason == BIO_RR_ACCEPT)
2340                                 return(SSL_ERROR_WANT_ACCEPT);
2341                         else
2342                                 return(SSL_ERROR_SYSCALL);
2343                         }
2344                 }
2345         if ((i < 0) && SSL_want_x509_lookup(s))
2346                 {
2347                 return(SSL_ERROR_WANT_X509_LOOKUP);
2348                 }
2349
2350         if (i == 0)
2351                 {
2352                 if (s->version == SSL2_VERSION)
2353                         {
2354                         /* assume it is the socket being closed */
2355                         return(SSL_ERROR_ZERO_RETURN);
2356                         }
2357                 else
2358                         {
2359                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2360                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2361                                 return(SSL_ERROR_ZERO_RETURN);
2362                         }
2363                 }
2364         return(SSL_ERROR_SYSCALL);
2365         }
2366
2367 int SSL_do_handshake(SSL *s)
2368         {
2369         int ret=1;
2370
2371         if (s->handshake_func == NULL)
2372                 {
2373                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2374                 return(-1);
2375                 }
2376
2377         s->method->ssl_renegotiate_check(s);
2378
2379         if (SSL_in_init(s) || SSL_in_before(s))
2380                 {
2381                 ret=s->handshake_func(s);
2382                 }
2383         return(ret);
2384         }
2385
2386 /* For the next 2 functions, SSL_clear() sets shutdown and so
2387  * one of these calls will reset it */
2388 void SSL_set_accept_state(SSL *s)
2389         {
2390         s->server=1;
2391         s->shutdown=0;
2392         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2393         s->handshake_func=s->method->ssl_accept;
2394         /* clear the current cipher */
2395         ssl_clear_cipher_ctx(s);
2396         ssl_clear_hash_ctx(&s->read_hash);
2397         ssl_clear_hash_ctx(&s->write_hash);
2398         }
2399
2400 void SSL_set_connect_state(SSL *s)
2401         {
2402         s->server=0;
2403         s->shutdown=0;
2404         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2405         s->handshake_func=s->method->ssl_connect;
2406         /* clear the current cipher */
2407         ssl_clear_cipher_ctx(s);
2408         ssl_clear_hash_ctx(&s->read_hash);
2409         ssl_clear_hash_ctx(&s->write_hash);
2410         }
2411
2412 int ssl_undefined_function(SSL *s)
2413         {
2414         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2415         return(0);
2416         }
2417
2418 int ssl_undefined_void_function(void)
2419         {
2420         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2421         return(0);
2422         }
2423
2424 int ssl_undefined_const_function(const SSL *s)
2425         {
2426         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2427         return(0);
2428         }
2429
2430 SSL_METHOD *ssl_bad_method(int ver)
2431         {
2432         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2433         return(NULL);
2434         }
2435
2436 const char *SSL_get_version(const SSL *s)
2437         {
2438         if (s->version == TLS1_1_VERSION)
2439                 return("TLSv1.1");
2440         else if (s->version == SSL3_VERSION)
2441                 return("SSLv3");
2442         else if (s->version == SSL3_VERSION)
2443                 return("SSLv3");
2444         else if (s->version == SSL2_VERSION)
2445                 return("SSLv2");
2446         else
2447                 return("unknown");
2448         }
2449
2450 SSL *SSL_dup(SSL *s)
2451         {
2452         STACK_OF(X509_NAME) *sk;
2453         X509_NAME *xn;
2454         SSL *ret;
2455         int i;
2456         
2457         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2458             return(NULL);
2459
2460         ret->version = s->version;
2461         ret->type = s->type;
2462         ret->method = s->method;
2463
2464         if (s->session != NULL)
2465                 {
2466                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2467                 SSL_copy_session_id(ret,s);
2468                 }
2469         else
2470                 {
2471                 /* No session has been established yet, so we have to expect
2472                  * that s->cert or ret->cert will be changed later --
2473                  * they should not both point to the same object,
2474                  * and thus we can't use SSL_copy_session_id. */
2475
2476                 ret->method->ssl_free(ret);
2477                 ret->method = s->method;
2478                 ret->method->ssl_new(ret);
2479
2480                 if (s->cert != NULL)
2481                         {
2482                         if (ret->cert != NULL)
2483                                 {
2484                                 ssl_cert_free(ret->cert);
2485                                 }
2486                         ret->cert = ssl_cert_dup(s->cert);
2487                         if (ret->cert == NULL)
2488                                 goto err;
2489                         }
2490                                 
2491                 SSL_set_session_id_context(ret,
2492                         s->sid_ctx, s->sid_ctx_length);
2493                 }
2494
2495         ret->options=s->options;
2496         ret->mode=s->mode;
2497         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2498         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2499         ret->msg_callback = s->msg_callback;
2500         ret->msg_callback_arg = s->msg_callback_arg;
2501         SSL_set_verify(ret,SSL_get_verify_mode(s),
2502                 SSL_get_verify_callback(s));
2503         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2504         ret->generate_session_id = s->generate_session_id;
2505
2506         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2507         
2508         ret->debug=s->debug;
2509
2510         /* copy app data, a little dangerous perhaps */
2511         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2512                 goto err;
2513
2514         /* setup rbio, and wbio */
2515         if (s->rbio != NULL)
2516                 {
2517                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2518                         goto err;
2519                 }
2520         if (s->wbio != NULL)
2521                 {
2522                 if (s->wbio != s->rbio)
2523                         {
2524                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2525                                 goto err;
2526                         }
2527                 else
2528                         ret->wbio=ret->rbio;
2529                 }
2530         ret->rwstate = s->rwstate;
2531         ret->in_handshake = s->in_handshake;
2532         ret->handshake_func = s->handshake_func;
2533         ret->server = s->server;
2534         ret->new_session = s->new_session;
2535         ret->quiet_shutdown = s->quiet_shutdown;
2536         ret->shutdown=s->shutdown;
2537         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2538         ret->rstate=s->rstate;
2539         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2540         ret->hit=s->hit;
2541
2542         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2543
2544         /* dup the cipher_list and cipher_list_by_id stacks */
2545         if (s->cipher_list != NULL)
2546                 {
2547                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2548                         goto err;
2549                 }
2550         if (s->cipher_list_by_id != NULL)
2551                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2552                         == NULL)
2553                         goto err;
2554
2555         /* Dup the client_CA list */
2556         if (s->client_CA != NULL)
2557                 {
2558                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2559                 ret->client_CA=sk;
2560                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2561                         {
2562                         xn=sk_X509_NAME_value(sk,i);
2563                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2564                                 {
2565                                 X509_NAME_free(xn);
2566                                 goto err;
2567                                 }
2568                         }
2569                 }
2570
2571         if (0)
2572                 {
2573 err:
2574                 if (ret != NULL) SSL_free(ret);
2575                 ret=NULL;
2576                 }
2577         return(ret);
2578         }
2579
2580 void ssl_clear_cipher_ctx(SSL *s)
2581         {
2582         if (s->enc_read_ctx != NULL)
2583                 {
2584                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2585                 OPENSSL_free(s->enc_read_ctx);
2586                 s->enc_read_ctx=NULL;
2587                 }
2588         if (s->enc_write_ctx != NULL)
2589                 {
2590                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2591                 OPENSSL_free(s->enc_write_ctx);
2592                 s->enc_write_ctx=NULL;
2593                 }
2594 #ifndef OPENSSL_NO_COMP
2595         if (s->expand != NULL)
2596                 {
2597                 COMP_CTX_free(s->expand);
2598                 s->expand=NULL;
2599                 }
2600         if (s->compress != NULL)
2601                 {
2602                 COMP_CTX_free(s->compress);
2603                 s->compress=NULL;
2604                 }
2605 #endif
2606         }
2607
2608 /* Fix this function so that it takes an optional type parameter */
2609 X509 *SSL_get_certificate(const SSL *s)
2610         {
2611         if (s->cert != NULL)
2612                 return(s->cert->key->x509);
2613         else
2614                 return(NULL);
2615         }
2616
2617 /* Fix this function so that it takes an optional type parameter */
2618 EVP_PKEY *SSL_get_privatekey(SSL *s)
2619         {
2620         if (s->cert != NULL)
2621                 return(s->cert->key->privatekey);
2622         else
2623                 return(NULL);
2624         }
2625
2626 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2627         {
2628         if ((s->session != NULL) && (s->session->cipher != NULL))
2629                 return(s->session->cipher);
2630         return(NULL);
2631         }
2632 #ifdef OPENSSL_NO_COMP
2633 const void *SSL_get_current_compression(SSL *s)
2634         {
2635         return NULL;
2636         }
2637 const void *SSL_get_current_expansion(SSL *s)
2638         {
2639         return NULL;
2640         }
2641 #else
2642
2643 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2644         {
2645         if (s->compress != NULL)
2646                 return(s->compress->meth);
2647         return(NULL);
2648         }
2649
2650 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2651         {
2652         if (s->expand != NULL)
2653                 return(s->expand->meth);
2654         return(NULL);
2655         }
2656 #endif
2657
2658 int ssl_init_wbio_buffer(SSL *s,int push)
2659         {
2660         BIO *bbio;
2661
2662         if (s->bbio == NULL)
2663                 {
2664                 bbio=BIO_new(BIO_f_buffer());
2665                 if (bbio == NULL) return(0);
2666                 s->bbio=bbio;
2667                 }
2668         else
2669                 {
2670                 bbio=s->bbio;
2671                 if (s->bbio == s->wbio)
2672                         s->wbio=BIO_pop(s->wbio);
2673                 }
2674         (void)BIO_reset(bbio);
2675 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2676         if (!BIO_set_read_buffer_size(bbio,1))
2677                 {
2678                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2679                 return(0);
2680                 }
2681         if (push)
2682                 {
2683                 if (s->wbio != bbio)
2684                         s->wbio=BIO_push(bbio,s->wbio);
2685                 }
2686         else
2687                 {
2688                 if (s->wbio == bbio)
2689                         s->wbio=BIO_pop(bbio);
2690                 }
2691         return(1);
2692         }
2693
2694 void ssl_free_wbio_buffer(SSL *s)
2695         {
2696         if (s->bbio == NULL) return;
2697
2698         if (s->bbio == s->wbio)
2699                 {
2700                 /* remove buffering */
2701                 s->wbio=BIO_pop(s->wbio);
2702 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2703                 assert(s->wbio != NULL);
2704 #endif
2705         }
2706         BIO_free(s->bbio);
2707         s->bbio=NULL;
2708         }
2709         
2710 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2711         {
2712         ctx->quiet_shutdown=mode;
2713         }
2714
2715 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2716         {
2717         return(ctx->quiet_shutdown);
2718         }
2719
2720 void SSL_set_quiet_shutdown(SSL *s,int mode)
2721         {
2722         s->quiet_shutdown=mode;
2723         }
2724
2725 int SSL_get_quiet_shutdown(const SSL *s)
2726         {
2727         return(s->quiet_shutdown);
2728         }
2729
2730 void SSL_set_shutdown(SSL *s,int mode)
2731         {
2732         s->shutdown=mode;
2733         }
2734
2735 int SSL_get_shutdown(const SSL *s)
2736         {
2737         return(s->shutdown);
2738         }
2739
2740 int SSL_version(const SSL *s)
2741         {
2742         return(s->version);
2743         }
2744
2745 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2746         {
2747         return(ssl->ctx);
2748         }
2749
2750 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2751         {
2752         if (ssl->ctx == ctx)
2753                 return ssl->ctx;
2754 #ifndef OPENSSL_NO_TLSEXT
2755         if (ctx == NULL)
2756                 ctx = ssl->initial_ctx;
2757 #endif
2758         if (ssl->cert != NULL)
2759                 ssl_cert_free(ssl->cert);
2760         ssl->cert = ssl_cert_dup(ctx->cert);
2761         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2762         if (ssl->ctx != NULL)
2763                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2764         ssl->ctx = ctx;
2765         return(ssl->ctx);
2766         }
2767
2768 #ifndef OPENSSL_NO_STDIO
2769 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2770         {
2771         return(X509_STORE_set_default_paths(ctx->cert_store));
2772         }
2773
2774 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2775                 const char *CApath)
2776         {
2777         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2778         }
2779 #endif
2780
2781 void SSL_set_info_callback(SSL *ssl,
2782         void (*cb)(const SSL *ssl,int type,int val))
2783         {
2784         ssl->info_callback=cb;
2785         }
2786
2787 /* One compiler (Diab DCC) doesn't like argument names in returned
2788    function pointer.  */
2789 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2790         {
2791         return ssl->info_callback;
2792         }
2793
2794 int SSL_state(const SSL *ssl)
2795         {
2796         return(ssl->state);
2797         }
2798
2799 void SSL_set_verify_result(SSL *ssl,long arg)
2800         {
2801         ssl->verify_result=arg;
2802         }
2803
2804 long SSL_get_verify_result(const SSL *ssl)
2805         {
2806         return(ssl->verify_result);
2807         }
2808
2809 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2810                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2811         {
2812         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2813                                 new_func, dup_func, free_func);
2814         }
2815
2816 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2817         {
2818         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2819         }
2820
2821 void *SSL_get_ex_data(const SSL *s,int idx)
2822         {
2823         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2824         }
2825
2826 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2827                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2828         {
2829         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2830                                 new_func, dup_func, free_func);
2831         }
2832
2833 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2834         {
2835         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2836         }
2837
2838 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2839         {
2840         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2841         }
2842
2843 int ssl_ok(SSL *s)
2844         {
2845         return(1);
2846         }
2847
2848 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2849         {
2850         return(ctx->cert_store);
2851         }
2852
2853 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2854         {
2855         if (ctx->cert_store != NULL)
2856                 X509_STORE_free(ctx->cert_store);
2857         ctx->cert_store=store;
2858         }
2859
2860 int SSL_want(const SSL *s)
2861         {
2862         return(s->rwstate);
2863         }
2864
2865 /*!
2866  * \brief Set the callback for generating temporary RSA keys.
2867  * \param ctx the SSL context.
2868  * \param cb the callback
2869  */
2870
2871 #ifndef OPENSSL_NO_RSA
2872 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2873                                                           int is_export,
2874                                                           int keylength))
2875     {
2876     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2877     }
2878
2879 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2880                                                   int is_export,
2881                                                   int keylength))
2882     {
2883     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2884     }
2885 #endif
2886
2887 #ifdef DOXYGEN
2888 /*!
2889  * \brief The RSA temporary key callback function.
2890  * \param ssl the SSL session.
2891  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2892  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2893  * of the required key in bits.
2894  * \return the temporary RSA key.
2895  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2896  */
2897
2898 RSA *cb(SSL *ssl,int is_export,int keylength)
2899     {}
2900 #endif
2901
2902 /*!
2903  * \brief Set the callback for generating temporary DH keys.
2904  * \param ctx the SSL context.
2905  * \param dh the callback
2906  */
2907
2908 #ifndef OPENSSL_NO_DH
2909 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2910                                                         int keylength))
2911         {
2912         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2913         }
2914
2915 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2916                                                 int keylength))
2917         {
2918         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2919         }
2920 #endif
2921
2922 #ifndef OPENSSL_NO_ECDH
2923 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2924                                                                 int keylength))
2925         {
2926         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2927         }
2928
2929 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2930                                                         int keylength))
2931         {
2932         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2933         }
2934 #endif
2935
2936 #ifndef OPENSSL_NO_PSK
2937 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2938         {
2939         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2940                 {
2941                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2942                 return 0;
2943                 }
2944         if (ctx->psk_identity_hint != NULL)
2945                 OPENSSL_free(ctx->psk_identity_hint);
2946         if (identity_hint != NULL)
2947                 {
2948                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2949                 if (ctx->psk_identity_hint == NULL)
2950                         return 0;
2951                 }
2952         else
2953                 ctx->psk_identity_hint = NULL;
2954         return 1;
2955         }
2956
2957 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2958         {
2959         if (s == NULL)
2960                 return 0;
2961
2962         if (s->session == NULL)
2963                 return 1; /* session not created yet, ignored */
2964
2965         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2966                 {
2967                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2968                 return 0;
2969                 }
2970         if (s->session->psk_identity_hint != NULL)
2971                 OPENSSL_free(s->session->psk_identity_hint);
2972         if (identity_hint != NULL)
2973                 {
2974                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2975                 if (s->session->psk_identity_hint == NULL)
2976                         return 0;
2977                 }
2978         else
2979                 s->session->psk_identity_hint = NULL;
2980         return 1;
2981         }
2982
2983 const char *SSL_get_psk_identity_hint(const SSL *s)
2984         {
2985         if (s == NULL || s->session == NULL)
2986                 return NULL;
2987         return(s->session->psk_identity_hint);
2988         }
2989
2990 const char *SSL_get_psk_identity(const SSL *s)
2991         {
2992         if (s == NULL || s->session == NULL)
2993                 return NULL;
2994         return(s->session->psk_identity);
2995         }
2996
2997 void SSL_set_psk_client_callback(SSL *s,
2998     unsigned int (*cb)(SSL *ssl, const char *hint,
2999                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3000                        unsigned int max_psk_len))
3001         {
3002         s->psk_client_callback = cb;
3003         }
3004
3005 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3006     unsigned int (*cb)(SSL *ssl, const char *hint,
3007                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3008                        unsigned int max_psk_len))
3009         {
3010         ctx->psk_client_callback = cb;
3011         }
3012
3013 void SSL_set_psk_server_callback(SSL *s,
3014     unsigned int (*cb)(SSL *ssl, const char *identity,
3015                        unsigned char *psk, unsigned int max_psk_len))
3016         {
3017         s->psk_server_callback = cb;
3018         }
3019
3020 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3021     unsigned int (*cb)(SSL *ssl, const char *identity,
3022                        unsigned char *psk, unsigned int max_psk_len))
3023         {
3024         ctx->psk_server_callback = cb;
3025         }
3026 #endif
3027
3028 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))
3029         {
3030         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3031         }
3032 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))
3033         {
3034         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3035         }
3036
3037 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3038  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3039  * any. If EVP_MD pointer is passed, initializes ctx with this md
3040  * Returns newly allocated ctx;
3041  */
3042
3043 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
3044 {
3045         ssl_clear_hash_ctx(hash);
3046         *hash = EVP_MD_CTX_create();
3047         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3048         return *hash;
3049 }
3050 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
3051 {
3052
3053         if (*hash) EVP_MD_CTX_destroy(*hash);
3054         *hash=NULL;
3055 }
3056
3057 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3058 #include "../crypto/bio/bss_file.c"
3059 #endif
3060
3061 IMPLEMENT_STACK_OF(SSL_CIPHER)
3062 IMPLEMENT_STACK_OF(SSL_COMP)
3063 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3064                                     ssl_cipher_id);
3065