Initial TLS v1.2 client support. Include a default supported signature
[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 <openssl/crypto.h>
150 #include "ssl_locl.h"
151 #include "kssl_lcl.h"
152 #include <openssl/objects.h>
153 #include <openssl/lhash.h>
154 #include <openssl/x509v3.h>
155 #include <openssl/rand.h>
156 #include <openssl/ocsp.h>
157 #ifndef OPENSSL_NO_DH
158 #include <openssl/dh.h>
159 #endif
160 #ifndef OPENSSL_NO_ENGINE
161 #include <openssl/engine.h>
162 #endif
163
164 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
165
166 SSL3_ENC_METHOD ssl3_undef_enc_method={
167         /* evil casts, but these functions are only called if there's a library bug */
168         (int (*)(SSL *,int))ssl_undefined_function,
169         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
170         ssl_undefined_function,
171         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
172         (int (*)(SSL*, int))ssl_undefined_function,
173         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
174         0,      /* finish_mac_length */
175         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
176         NULL,   /* client_finished_label */
177         0,      /* client_finished_label_len */
178         NULL,   /* server_finished_label */
179         0,      /* server_finished_label_len */
180         (int (*)(int))ssl_undefined_function
181         };
182
183 int SSL_clear(SSL *s)
184         {
185
186         if (s->method == NULL)
187                 {
188                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
189                 return(0);
190                 }
191
192         if (ssl_clear_bad_session(s))
193                 {
194                 SSL_SESSION_free(s->session);
195                 s->session=NULL;
196                 }
197
198         s->error=0;
199         s->hit=0;
200         s->shutdown=0;
201
202 #if 0 /* Disabled since version 1.10 of this file (early return not
203        * needed because SSL_clear is not called when doing renegotiation) */
204         /* This is set if we are doing dynamic renegotiation so keep
205          * the old cipher.  It is sort of a SSL_clear_lite :-) */
206         if (s->renegotiate) return(1);
207 #else
208         if (s->renegotiate)
209                 {
210                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
211                 return 0;
212                 }
213 #endif
214
215         s->type=0;
216
217         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
218
219         s->version=s->method->version;
220         s->client_version=s->version;
221         s->rwstate=SSL_NOTHING;
222         s->rstate=SSL_ST_READ_HEADER;
223 #if 0
224         s->read_ahead=s->ctx->read_ahead;
225 #endif
226
227         if (s->init_buf != NULL)
228                 {
229                 BUF_MEM_free(s->init_buf);
230                 s->init_buf=NULL;
231                 }
232
233         ssl_clear_cipher_ctx(s);
234         ssl_clear_hash_ctx(&s->read_hash);
235         ssl_clear_hash_ctx(&s->write_hash);
236
237         s->first_packet=0;
238
239 #if 1
240         /* Check to see if we were changed into a different method, if
241          * so, revert back if we are not doing session-id reuse. */
242         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
243                 {
244                 s->method->ssl_free(s);
245                 s->method=s->ctx->method;
246                 if (!s->method->ssl_new(s))
247                         return(0);
248                 }
249         else
250 #endif
251                 s->method->ssl_clear(s);
252         return(1);
253         }
254
255 /** Used to change an SSL_CTXs default SSL method type */
256 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
257         {
258         STACK_OF(SSL_CIPHER) *sk;
259
260         ctx->method=meth;
261
262         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
263                 &(ctx->cipher_list_by_id),
264                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
265         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
266                 {
267                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
268                 return(0);
269                 }
270         return(1);
271         }
272
273 SSL *SSL_new(SSL_CTX *ctx)
274         {
275         SSL *s;
276
277         if (ctx == NULL)
278                 {
279                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
280                 return(NULL);
281                 }
282         if (ctx->method == NULL)
283                 {
284                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
285                 return(NULL);
286                 }
287
288         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
289         if (s == NULL) goto err;
290         memset(s,0,sizeof(SSL));
291
292 #ifndef OPENSSL_NO_KRB5
293         s->kssl_ctx = kssl_ctx_new();
294 #endif  /* OPENSSL_NO_KRB5 */
295
296         s->options=ctx->options;
297         s->mode=ctx->mode;
298         s->max_cert_list=ctx->max_cert_list;
299
300         if (ctx->cert != NULL)
301                 {
302                 /* Earlier library versions used to copy the pointer to
303                  * the CERT, not its contents; only when setting new
304                  * parameters for the per-SSL copy, ssl_cert_new would be
305                  * called (and the direct reference to the per-SSL_CTX
306                  * settings would be lost, but those still were indirectly
307                  * accessed for various purposes, and for that reason they
308                  * used to be known as s->ctx->default_cert).
309                  * Now we don't look at the SSL_CTX's CERT after having
310                  * duplicated it once. */
311
312                 s->cert = ssl_cert_dup(ctx->cert);
313                 if (s->cert == NULL)
314                         goto err;
315                 }
316         else
317                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
318
319         s->read_ahead=ctx->read_ahead;
320         s->msg_callback=ctx->msg_callback;
321         s->msg_callback_arg=ctx->msg_callback_arg;
322         s->verify_mode=ctx->verify_mode;
323         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
324 #if 0
325         s->verify_depth=ctx->verify_depth;
326 #endif
327         s->sid_ctx_length=ctx->sid_ctx_length;
328         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
329         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
330         s->verify_callback=ctx->default_verify_callback;
331         s->generate_session_id=ctx->generate_session_id;
332
333         s->param = X509_VERIFY_PARAM_new();
334         if (!s->param)
335                 goto err;
336         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
337 #if 0
338         s->purpose = ctx->purpose;
339         s->trust = ctx->trust;
340 #endif
341         s->quiet_shutdown=ctx->quiet_shutdown;
342         s->max_send_fragment = ctx->max_send_fragment;
343
344         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
345         s->ctx=ctx;
346 #ifndef OPENSSL_NO_TLSEXT
347         s->tlsext_debug_cb = 0;
348         s->tlsext_debug_arg = NULL;
349         s->tlsext_ticket_expected = 0;
350         s->tlsext_status_type = -1;
351         s->tlsext_status_expected = 0;
352         s->tlsext_ocsp_ids = NULL;
353         s->tlsext_ocsp_exts = NULL;
354         s->tlsext_ocsp_resp = NULL;
355         s->tlsext_ocsp_resplen = -1;
356         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
357         s->initial_ctx=ctx;
358 # ifndef OPENSSL_NO_NEXTPROTONEG
359         s->next_proto_negotiated = NULL;
360 # endif
361 #endif
362
363         s->verify_result=X509_V_OK;
364
365         s->method=ctx->method;
366
367         if (!s->method->ssl_new(s))
368                 goto err;
369
370         s->references=1;
371         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
372
373         SSL_clear(s);
374
375         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
376
377 #ifndef OPENSSL_NO_PSK
378         s->psk_client_callback=ctx->psk_client_callback;
379         s->psk_server_callback=ctx->psk_server_callback;
380 #endif
381
382         return(s);
383 err:
384         if (s != NULL)
385                 {
386                 if (s->cert != NULL)
387                         ssl_cert_free(s->cert);
388                 if (s->ctx != NULL)
389                         SSL_CTX_free(s->ctx); /* decrement reference count */
390                 OPENSSL_free(s);
391                 }
392         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
393         return(NULL);
394         }
395
396 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
397                                    unsigned int sid_ctx_len)
398     {
399     if(sid_ctx_len > sizeof ctx->sid_ctx)
400         {
401         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
402         return 0;
403         }
404     ctx->sid_ctx_length=sid_ctx_len;
405     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
406
407     return 1;
408     }
409
410 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
411                                unsigned int sid_ctx_len)
412     {
413     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
414         {
415         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
416         return 0;
417         }
418     ssl->sid_ctx_length=sid_ctx_len;
419     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
420
421     return 1;
422     }
423
424 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
425         {
426         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
427         ctx->generate_session_id = cb;
428         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
429         return 1;
430         }
431
432 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
433         {
434         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
435         ssl->generate_session_id = cb;
436         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
437         return 1;
438         }
439
440 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
441                                 unsigned int id_len)
442         {
443         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
444          * we can "construct" a session to give us the desired check - ie. to
445          * find if there's a session in the hash table that would conflict with
446          * any new session built out of this id/id_len and the ssl_version in
447          * use by this SSL. */
448         SSL_SESSION r, *p;
449
450         if(id_len > sizeof r.session_id)
451                 return 0;
452
453         r.ssl_version = ssl->version;
454         r.session_id_length = id_len;
455         memcpy(r.session_id, id, id_len);
456         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
457          * callback is calling us to check the uniqueness of a shorter ID, it
458          * must be compared as a padded-out ID because that is what it will be
459          * converted to when the callback has finished choosing it. */
460         if((r.ssl_version == SSL2_VERSION) &&
461                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
462                 {
463                 memset(r.session_id + id_len, 0,
464                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
465                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
466                 }
467
468         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
469         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
470         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
471         return (p != NULL);
472         }
473
474 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
475         {
476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
477         }
478
479 int SSL_set_purpose(SSL *s, int purpose)
480         {
481         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
482         }
483
484 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
485         {
486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
487         }
488
489 int SSL_set_trust(SSL *s, int trust)
490         {
491         return X509_VERIFY_PARAM_set_trust(s->param, trust);
492         }
493
494 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
495         {
496         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
497         }
498
499 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
500         {
501         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
502         }
503
504 void SSL_free(SSL *s)
505         {
506         int i;
507
508         if(s == NULL)
509             return;
510
511         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
512 #ifdef REF_PRINT
513         REF_PRINT("SSL",s);
514 #endif
515         if (i > 0) return;
516 #ifdef REF_CHECK
517         if (i < 0)
518                 {
519                 fprintf(stderr,"SSL_free, bad reference count\n");
520                 abort(); /* ok */
521                 }
522 #endif
523
524         if (s->param)
525                 X509_VERIFY_PARAM_free(s->param);
526
527         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
528
529         if (s->bbio != NULL)
530                 {
531                 /* If the buffering BIO is in place, pop it off */
532                 if (s->bbio == s->wbio)
533                         {
534                         s->wbio=BIO_pop(s->wbio);
535                         }
536                 BIO_free(s->bbio);
537                 s->bbio=NULL;
538                 }
539         if (s->rbio != NULL)
540                 BIO_free_all(s->rbio);
541         if ((s->wbio != NULL) && (s->wbio != s->rbio))
542                 BIO_free_all(s->wbio);
543
544         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
545
546         /* add extra stuff */
547         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
548         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
549
550         /* Make the next call work :-) */
551         if (s->session != NULL)
552                 {
553                 ssl_clear_bad_session(s);
554                 SSL_SESSION_free(s->session);
555                 }
556
557         ssl_clear_cipher_ctx(s);
558         ssl_clear_hash_ctx(&s->read_hash);
559         ssl_clear_hash_ctx(&s->write_hash);
560
561         if (s->cert != NULL) ssl_cert_free(s->cert);
562         /* Free up if allocated */
563
564 #ifndef OPENSSL_NO_TLSEXT
565         if (s->tlsext_hostname)
566                 OPENSSL_free(s->tlsext_hostname);
567         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
568 #ifndef OPENSSL_NO_EC
569         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
570         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
571 #endif /* OPENSSL_NO_EC */
572         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
573         if (s->tlsext_ocsp_exts)
574                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
575                                                 X509_EXTENSION_free);
576         if (s->tlsext_ocsp_ids)
577                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
578         if (s->tlsext_ocsp_resp)
579                 OPENSSL_free(s->tlsext_ocsp_resp);
580 #endif
581
582         if (s->client_CA != NULL)
583                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
584
585         if (s->method != NULL) s->method->ssl_free(s);
586
587         if (s->ctx) SSL_CTX_free(s->ctx);
588
589 #ifndef OPENSSL_NO_KRB5
590         if (s->kssl_ctx != NULL)
591                 kssl_ctx_free(s->kssl_ctx);
592 #endif  /* OPENSSL_NO_KRB5 */
593
594 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
595         if (s->next_proto_negotiated)
596                 OPENSSL_free(s->next_proto_negotiated);
597 #endif
598
599         OPENSSL_free(s);
600         }
601
602 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
603         {
604         /* If the output buffering BIO is still in place, remove it
605          */
606         if (s->bbio != NULL)
607                 {
608                 if (s->wbio == s->bbio)
609                         {
610                         s->wbio=s->wbio->next_bio;
611                         s->bbio->next_bio=NULL;
612                         }
613                 }
614         if ((s->rbio != NULL) && (s->rbio != rbio))
615                 BIO_free_all(s->rbio);
616         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
617                 BIO_free_all(s->wbio);
618         s->rbio=rbio;
619         s->wbio=wbio;
620         }
621
622 BIO *SSL_get_rbio(const SSL *s)
623         { return(s->rbio); }
624
625 BIO *SSL_get_wbio(const SSL *s)
626         { return(s->wbio); }
627
628 int SSL_get_fd(const SSL *s)
629         {
630         return(SSL_get_rfd(s));
631         }
632
633 int SSL_get_rfd(const SSL *s)
634         {
635         int ret= -1;
636         BIO *b,*r;
637
638         b=SSL_get_rbio(s);
639         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
640         if (r != NULL)
641                 BIO_get_fd(r,&ret);
642         return(ret);
643         }
644
645 int SSL_get_wfd(const SSL *s)
646         {
647         int ret= -1;
648         BIO *b,*r;
649
650         b=SSL_get_wbio(s);
651         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
652         if (r != NULL)
653                 BIO_get_fd(r,&ret);
654         return(ret);
655         }
656
657 #ifndef OPENSSL_NO_SOCK
658 int SSL_set_fd(SSL *s,int fd)
659         {
660         int ret=0;
661         BIO *bio=NULL;
662
663         bio=BIO_new(BIO_s_socket());
664
665         if (bio == NULL)
666                 {
667                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
668                 goto err;
669                 }
670         BIO_set_fd(bio,fd,BIO_NOCLOSE);
671         SSL_set_bio(s,bio,bio);
672         ret=1;
673 err:
674         return(ret);
675         }
676
677 int SSL_set_wfd(SSL *s,int fd)
678         {
679         int ret=0;
680         BIO *bio=NULL;
681
682         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
683                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
684                 {
685                 bio=BIO_new(BIO_s_socket());
686
687                 if (bio == NULL)
688                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
689                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
690                 SSL_set_bio(s,SSL_get_rbio(s),bio);
691                 }
692         else
693                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
694         ret=1;
695 err:
696         return(ret);
697         }
698
699 int SSL_set_rfd(SSL *s,int fd)
700         {
701         int ret=0;
702         BIO *bio=NULL;
703
704         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
705                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
706                 {
707                 bio=BIO_new(BIO_s_socket());
708
709                 if (bio == NULL)
710                         {
711                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
712                         goto err;
713                         }
714                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
715                 SSL_set_bio(s,bio,SSL_get_wbio(s));
716                 }
717         else
718                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
719         ret=1;
720 err:
721         return(ret);
722         }
723 #endif
724
725
726 /* return length of latest Finished message we sent, copy to 'buf' */
727 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
728         {
729         size_t ret = 0;
730         
731         if (s->s3 != NULL)
732                 {
733                 ret = s->s3->tmp.finish_md_len;
734                 if (count > ret)
735                         count = ret;
736                 memcpy(buf, s->s3->tmp.finish_md, count);
737                 }
738         return ret;
739         }
740
741 /* return length of latest Finished message we expected, copy to 'buf' */
742 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
743         {
744         size_t ret = 0;
745         
746         if (s->s3 != NULL)
747                 {
748                 ret = s->s3->tmp.peer_finish_md_len;
749                 if (count > ret)
750                         count = ret;
751                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
752                 }
753         return ret;
754         }
755
756
757 int SSL_get_verify_mode(const SSL *s)
758         {
759         return(s->verify_mode);
760         }
761
762 int SSL_get_verify_depth(const SSL *s)
763         {
764         return X509_VERIFY_PARAM_get_depth(s->param);
765         }
766
767 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
768         {
769         return(s->verify_callback);
770         }
771
772 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
773         {
774         return(ctx->verify_mode);
775         }
776
777 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
778         {
779         return X509_VERIFY_PARAM_get_depth(ctx->param);
780         }
781
782 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
783         {
784         return(ctx->default_verify_callback);
785         }
786
787 void SSL_set_verify(SSL *s,int mode,
788                     int (*callback)(int ok,X509_STORE_CTX *ctx))
789         {
790         s->verify_mode=mode;
791         if (callback != NULL)
792                 s->verify_callback=callback;
793         }
794
795 void SSL_set_verify_depth(SSL *s,int depth)
796         {
797         X509_VERIFY_PARAM_set_depth(s->param, depth);
798         }
799
800 void SSL_set_read_ahead(SSL *s,int yes)
801         {
802         s->read_ahead=yes;
803         }
804
805 int SSL_get_read_ahead(const SSL *s)
806         {
807         return(s->read_ahead);
808         }
809
810 int SSL_pending(const SSL *s)
811         {
812         /* SSL_pending cannot work properly if read-ahead is enabled
813          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
814          * and it is impossible to fix since SSL_pending cannot report
815          * errors that may be observed while scanning the new data.
816          * (Note that SSL_pending() is often used as a boolean value,
817          * so we'd better not return -1.)
818          */
819         return(s->method->ssl_pending(s));
820         }
821
822 X509 *SSL_get_peer_certificate(const SSL *s)
823         {
824         X509 *r;
825         
826         if ((s == NULL) || (s->session == NULL))
827                 r=NULL;
828         else
829                 r=s->session->peer;
830
831         if (r == NULL) return(r);
832
833         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
834
835         return(r);
836         }
837
838 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
839         {
840         STACK_OF(X509) *r;
841         
842         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
843                 r=NULL;
844         else
845                 r=s->session->sess_cert->cert_chain;
846
847         /* If we are a client, cert_chain includes the peer's own
848          * certificate; if we are a server, it does not. */
849         
850         return(r);
851         }
852
853 /* Now in theory, since the calling process own 't' it should be safe to
854  * modify.  We need to be able to read f without being hassled */
855 void SSL_copy_session_id(SSL *t,const SSL *f)
856         {
857         CERT *tmp;
858
859         /* Do we need to to SSL locking? */
860         SSL_set_session(t,SSL_get_session(f));
861
862         /* what if we are setup as SSLv2 but want to talk SSLv3 or
863          * vice-versa */
864         if (t->method != f->method)
865                 {
866                 t->method->ssl_free(t); /* cleanup current */
867                 t->method=f->method;    /* change method */
868                 t->method->ssl_new(t);  /* setup new */
869                 }
870
871         tmp=t->cert;
872         if (f->cert != NULL)
873                 {
874                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
875                 t->cert=f->cert;
876                 }
877         else
878                 t->cert=NULL;
879         if (tmp != NULL) ssl_cert_free(tmp);
880         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
881         }
882
883 /* Fix this so it checks all the valid key/cert options */
884 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
885         {
886         if (    (ctx == NULL) ||
887                 (ctx->cert == NULL) ||
888                 (ctx->cert->key->x509 == NULL))
889                 {
890                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
891                 return(0);
892                 }
893         if      (ctx->cert->key->privatekey == NULL)
894                 {
895                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
896                 return(0);
897                 }
898         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
899         }
900
901 /* Fix this function so that it takes an optional type parameter */
902 int SSL_check_private_key(const SSL *ssl)
903         {
904         if (ssl == NULL)
905                 {
906                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
907                 return(0);
908                 }
909         if (ssl->cert == NULL)
910                 {
911                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
912                 return 0;
913                 }
914         if (ssl->cert->key->x509 == NULL)
915                 {
916                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
917                 return(0);
918                 }
919         if (ssl->cert->key->privatekey == NULL)
920                 {
921                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
922                 return(0);
923                 }
924         return(X509_check_private_key(ssl->cert->key->x509,
925                 ssl->cert->key->privatekey));
926         }
927
928 int SSL_accept(SSL *s)
929         {
930         if (s->handshake_func == 0)
931                 /* Not properly initialized yet */
932                 SSL_set_accept_state(s);
933
934         return(s->method->ssl_accept(s));
935         }
936
937 int SSL_connect(SSL *s)
938         {
939         if (s->handshake_func == 0)
940                 /* Not properly initialized yet */
941                 SSL_set_connect_state(s);
942
943         return(s->method->ssl_connect(s));
944         }
945
946 long SSL_get_default_timeout(const SSL *s)
947         {
948         return(s->method->get_timeout());
949         }
950
951 int SSL_read(SSL *s,void *buf,int num)
952         {
953         if (s->handshake_func == 0)
954                 {
955                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
956                 return -1;
957                 }
958
959         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
960                 {
961                 s->rwstate=SSL_NOTHING;
962                 return(0);
963                 }
964         return(s->method->ssl_read(s,buf,num));
965         }
966
967 int SSL_peek(SSL *s,void *buf,int num)
968         {
969         if (s->handshake_func == 0)
970                 {
971                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
972                 return -1;
973                 }
974
975         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
976                 {
977                 return(0);
978                 }
979         return(s->method->ssl_peek(s,buf,num));
980         }
981
982 int SSL_write(SSL *s,const void *buf,int num)
983         {
984         if (s->handshake_func == 0)
985                 {
986                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
987                 return -1;
988                 }
989
990         if (s->shutdown & SSL_SENT_SHUTDOWN)
991                 {
992                 s->rwstate=SSL_NOTHING;
993                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
994                 return(-1);
995                 }
996         return(s->method->ssl_write(s,buf,num));
997         }
998
999 int SSL_shutdown(SSL *s)
1000         {
1001         /* Note that this function behaves differently from what one might
1002          * expect.  Return values are 0 for no success (yet),
1003          * 1 for success; but calling it once is usually not enough,
1004          * even if blocking I/O is used (see ssl3_shutdown).
1005          */
1006
1007         if (s->handshake_func == 0)
1008                 {
1009                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1010                 return -1;
1011                 }
1012
1013         if ((s != NULL) && !SSL_in_init(s))
1014                 return(s->method->ssl_shutdown(s));
1015         else
1016                 return(1);
1017         }
1018
1019 int SSL_renegotiate(SSL *s)
1020         {
1021         if (s->renegotiate == 0)
1022                 s->renegotiate=1;
1023
1024         s->new_session=1;
1025
1026         return(s->method->ssl_renegotiate(s));
1027         }
1028
1029 int SSL_renegotiate_abbreviated(SSL *s)
1030 {
1031         if (s->renegotiate == 0)
1032                 s->renegotiate=1;
1033         
1034         s->new_session=0;
1035         
1036         return(s->method->ssl_renegotiate(s));
1037 }
1038
1039 int SSL_renegotiate_pending(SSL *s)
1040         {
1041         /* becomes true when negotiation is requested;
1042          * false again once a handshake has finished */
1043         return (s->renegotiate != 0);
1044         }
1045
1046 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1047         {
1048         long l;
1049
1050         switch (cmd)
1051                 {
1052         case SSL_CTRL_GET_READ_AHEAD:
1053                 return(s->read_ahead);
1054         case SSL_CTRL_SET_READ_AHEAD:
1055                 l=s->read_ahead;
1056                 s->read_ahead=larg;
1057                 return(l);
1058
1059         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1060                 s->msg_callback_arg = parg;
1061                 return 1;
1062
1063         case SSL_CTRL_OPTIONS:
1064                 return(s->options|=larg);
1065         case SSL_CTRL_CLEAR_OPTIONS:
1066                 return(s->options&=~larg);
1067         case SSL_CTRL_MODE:
1068                 return(s->mode|=larg);
1069         case SSL_CTRL_CLEAR_MODE:
1070                 return(s->mode &=~larg);
1071         case SSL_CTRL_GET_MAX_CERT_LIST:
1072                 return(s->max_cert_list);
1073         case SSL_CTRL_SET_MAX_CERT_LIST:
1074                 l=s->max_cert_list;
1075                 s->max_cert_list=larg;
1076                 return(l);
1077         case SSL_CTRL_SET_MTU:
1078                 if (SSL_version(s) == DTLS1_VERSION ||
1079                     SSL_version(s) == DTLS1_BAD_VER)
1080                         {
1081                         s->d1->mtu = larg;
1082                         return larg;
1083                         }
1084                 return 0;
1085         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1086                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1087                         return 0;
1088                 s->max_send_fragment = larg;
1089                 return 1;
1090         case SSL_CTRL_GET_RI_SUPPORT:
1091                 if (s->s3)
1092                         return s->s3->send_connection_binding;
1093                 else return 0;
1094         default:
1095                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1096                 }
1097         }
1098
1099 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1100         {
1101         switch(cmd)
1102                 {
1103         case SSL_CTRL_SET_MSG_CALLBACK:
1104                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1105                 return 1;
1106                 
1107         default:
1108                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1109                 }
1110         }
1111
1112 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1113         {
1114         return ctx->sessions;
1115         }
1116
1117 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1118         {
1119         long l;
1120
1121         switch (cmd)
1122                 {
1123         case SSL_CTRL_GET_READ_AHEAD:
1124                 return(ctx->read_ahead);
1125         case SSL_CTRL_SET_READ_AHEAD:
1126                 l=ctx->read_ahead;
1127                 ctx->read_ahead=larg;
1128                 return(l);
1129                 
1130         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1131                 ctx->msg_callback_arg = parg;
1132                 return 1;
1133
1134         case SSL_CTRL_GET_MAX_CERT_LIST:
1135                 return(ctx->max_cert_list);
1136         case SSL_CTRL_SET_MAX_CERT_LIST:
1137                 l=ctx->max_cert_list;
1138                 ctx->max_cert_list=larg;
1139                 return(l);
1140
1141         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1142                 l=ctx->session_cache_size;
1143                 ctx->session_cache_size=larg;
1144                 return(l);
1145         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1146                 return(ctx->session_cache_size);
1147         case SSL_CTRL_SET_SESS_CACHE_MODE:
1148                 l=ctx->session_cache_mode;
1149                 ctx->session_cache_mode=larg;
1150                 return(l);
1151         case SSL_CTRL_GET_SESS_CACHE_MODE:
1152                 return(ctx->session_cache_mode);
1153
1154         case SSL_CTRL_SESS_NUMBER:
1155                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1156         case SSL_CTRL_SESS_CONNECT:
1157                 return(ctx->stats.sess_connect);
1158         case SSL_CTRL_SESS_CONNECT_GOOD:
1159                 return(ctx->stats.sess_connect_good);
1160         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1161                 return(ctx->stats.sess_connect_renegotiate);
1162         case SSL_CTRL_SESS_ACCEPT:
1163                 return(ctx->stats.sess_accept);
1164         case SSL_CTRL_SESS_ACCEPT_GOOD:
1165                 return(ctx->stats.sess_accept_good);
1166         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1167                 return(ctx->stats.sess_accept_renegotiate);
1168         case SSL_CTRL_SESS_HIT:
1169                 return(ctx->stats.sess_hit);
1170         case SSL_CTRL_SESS_CB_HIT:
1171                 return(ctx->stats.sess_cb_hit);
1172         case SSL_CTRL_SESS_MISSES:
1173                 return(ctx->stats.sess_miss);
1174         case SSL_CTRL_SESS_TIMEOUTS:
1175                 return(ctx->stats.sess_timeout);
1176         case SSL_CTRL_SESS_CACHE_FULL:
1177                 return(ctx->stats.sess_cache_full);
1178         case SSL_CTRL_OPTIONS:
1179                 return(ctx->options|=larg);
1180         case SSL_CTRL_CLEAR_OPTIONS:
1181                 return(ctx->options&=~larg);
1182         case SSL_CTRL_MODE:
1183                 return(ctx->mode|=larg);
1184         case SSL_CTRL_CLEAR_MODE:
1185                 return(ctx->mode&=~larg);
1186         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1187                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1188                         return 0;
1189                 ctx->max_send_fragment = larg;
1190                 return 1;
1191         default:
1192                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1193                 }
1194         }
1195
1196 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1197         {
1198         switch(cmd)
1199                 {
1200         case SSL_CTRL_SET_MSG_CALLBACK:
1201                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1202                 return 1;
1203
1204         default:
1205                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1206                 }
1207         }
1208
1209 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1210         {
1211         long l;
1212
1213         l=a->id-b->id;
1214         if (l == 0L)
1215                 return(0);
1216         else
1217                 return((l > 0)?1:-1);
1218         }
1219
1220 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1221                         const SSL_CIPHER * const *bp)
1222         {
1223         long l;
1224
1225         l=(*ap)->id-(*bp)->id;
1226         if (l == 0L)
1227                 return(0);
1228         else
1229                 return((l > 0)?1:-1);
1230         }
1231
1232 /** return a STACK of the ciphers available for the SSL and in order of
1233  * preference */
1234 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1235         {
1236         if (s != NULL)
1237                 {
1238                 if (s->cipher_list != NULL)
1239                         {
1240                         return(s->cipher_list);
1241                         }
1242                 else if ((s->ctx != NULL) &&
1243                         (s->ctx->cipher_list != NULL))
1244                         {
1245                         return(s->ctx->cipher_list);
1246                         }
1247                 }
1248         return(NULL);
1249         }
1250
1251 /** return a STACK of the ciphers available for the SSL and in order of
1252  * algorithm id */
1253 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1254         {
1255         if (s != NULL)
1256                 {
1257                 if (s->cipher_list_by_id != NULL)
1258                         {
1259                         return(s->cipher_list_by_id);
1260                         }
1261                 else if ((s->ctx != NULL) &&
1262                         (s->ctx->cipher_list_by_id != NULL))
1263                         {
1264                         return(s->ctx->cipher_list_by_id);
1265                         }
1266                 }
1267         return(NULL);
1268         }
1269
1270 /** The old interface to get the same thing as SSL_get_ciphers() */
1271 const char *SSL_get_cipher_list(const SSL *s,int n)
1272         {
1273         SSL_CIPHER *c;
1274         STACK_OF(SSL_CIPHER) *sk;
1275
1276         if (s == NULL) return(NULL);
1277         sk=SSL_get_ciphers(s);
1278         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1279                 return(NULL);
1280         c=sk_SSL_CIPHER_value(sk,n);
1281         if (c == NULL) return(NULL);
1282         return(c->name);
1283         }
1284
1285 /** specify the ciphers to be used by default by the SSL_CTX */
1286 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1287         {
1288         STACK_OF(SSL_CIPHER) *sk;
1289         
1290         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1291                 &ctx->cipher_list_by_id,str);
1292         /* ssl_create_cipher_list may return an empty stack if it
1293          * was unable to find a cipher matching the given rule string
1294          * (for example if the rule string specifies a cipher which
1295          * has been disabled). This is not an error as far as
1296          * ssl_create_cipher_list is concerned, and hence
1297          * ctx->cipher_list and ctx->cipher_list_by_id has been
1298          * updated. */
1299         if (sk == NULL)
1300                 return 0;
1301         else if (sk_SSL_CIPHER_num(sk) == 0)
1302                 {
1303                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1304                 return 0;
1305                 }
1306         return 1;
1307         }
1308
1309 /** specify the ciphers to be used by the SSL */
1310 int SSL_set_cipher_list(SSL *s,const char *str)
1311         {
1312         STACK_OF(SSL_CIPHER) *sk;
1313         
1314         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1315                 &s->cipher_list_by_id,str);
1316         /* see comment in SSL_CTX_set_cipher_list */
1317         if (sk == NULL)
1318                 return 0;
1319         else if (sk_SSL_CIPHER_num(sk) == 0)
1320                 {
1321                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1322                 return 0;
1323                 }
1324         return 1;
1325         }
1326
1327 /* works well for SSLv2, not so good for SSLv3 */
1328 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1329         {
1330         char *p;
1331         STACK_OF(SSL_CIPHER) *sk;
1332         SSL_CIPHER *c;
1333         int i;
1334
1335         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1336                 (len < 2))
1337                 return(NULL);
1338
1339         p=buf;
1340         sk=s->session->ciphers;
1341         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1342                 {
1343                 int n;
1344
1345                 c=sk_SSL_CIPHER_value(sk,i);
1346                 n=strlen(c->name);
1347                 if (n+1 > len)
1348                         {
1349                         if (p != buf)
1350                                 --p;
1351                         *p='\0';
1352                         return buf;
1353                         }
1354                 strcpy(p,c->name);
1355                 p+=n;
1356                 *(p++)=':';
1357                 len-=n+1;
1358                 }
1359         p[-1]='\0';
1360         return(buf);
1361         }
1362
1363 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1364                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1365         {
1366         int i,j=0;
1367         SSL_CIPHER *c;
1368         unsigned char *q;
1369 #ifndef OPENSSL_NO_KRB5
1370         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1371 #endif /* OPENSSL_NO_KRB5 */
1372
1373         if (sk == NULL) return(0);
1374         q=p;
1375
1376         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1377                 {
1378                 c=sk_SSL_CIPHER_value(sk,i);
1379 #ifndef OPENSSL_NO_KRB5
1380                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1381                     nokrb5)
1382                     continue;
1383 #endif /* OPENSSL_NO_KRB5 */
1384 #ifndef OPENSSL_NO_PSK
1385                 /* with PSK there must be client callback set */
1386                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1387                     s->psk_client_callback == NULL)
1388                         continue;
1389 #endif /* OPENSSL_NO_PSK */
1390                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1391                 p+=j;
1392                 }
1393         /* If p == q, no ciphers and caller indicates an error. Otherwise
1394          * add SCSV if not renegotiating.
1395          */
1396         if (p != q && !s->renegotiate)
1397                 {
1398                 static SSL_CIPHER scsv =
1399                         {
1400                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1401                         };
1402                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1403                 p+=j;
1404 #ifdef OPENSSL_RI_DEBUG
1405                 fprintf(stderr, "SCSV sent by client\n");
1406 #endif
1407                 }
1408
1409         return(p-q);
1410         }
1411
1412 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1413                                                STACK_OF(SSL_CIPHER) **skp)
1414         {
1415         const SSL_CIPHER *c;
1416         STACK_OF(SSL_CIPHER) *sk;
1417         int i,n;
1418         if (s->s3)
1419                 s->s3->send_connection_binding = 0;
1420
1421         n=ssl_put_cipher_by_char(s,NULL,NULL);
1422         if ((num%n) != 0)
1423                 {
1424                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1425                 return(NULL);
1426                 }
1427         if ((skp == NULL) || (*skp == NULL))
1428                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1429         else
1430                 {
1431                 sk= *skp;
1432                 sk_SSL_CIPHER_zero(sk);
1433                 }
1434
1435         for (i=0; i<num; i+=n)
1436                 {
1437                 /* Check for SCSV */
1438                 if (s->s3 && (n != 3 || !p[0]) &&
1439                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1440                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1441                         {
1442                         /* SCSV fatal if renegotiating */
1443                         if (s->renegotiate)
1444                                 {
1445                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1446                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
1447                                 goto err;
1448                                 }
1449                         s->s3->send_connection_binding = 1;
1450                         p += n;
1451 #ifdef OPENSSL_RI_DEBUG
1452                         fprintf(stderr, "SCSV received by server\n");
1453 #endif
1454                         continue;
1455                         }
1456
1457                 c=ssl_get_cipher_by_char(s,p);
1458                 p+=n;
1459                 if (c != NULL)
1460                         {
1461                         if (!sk_SSL_CIPHER_push(sk,c))
1462                                 {
1463                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1464                                 goto err;
1465                                 }
1466                         }
1467                 }
1468
1469         if (skp != NULL)
1470                 *skp=sk;
1471         return(sk);
1472 err:
1473         if ((skp == NULL) || (*skp == NULL))
1474                 sk_SSL_CIPHER_free(sk);
1475         return(NULL);
1476         }
1477
1478
1479 #ifndef OPENSSL_NO_TLSEXT
1480 /** return a servername extension value if provided in Client Hello, or NULL.
1481  * So far, only host_name types are defined (RFC 3546).
1482  */
1483
1484 const char *SSL_get_servername(const SSL *s, const int type)
1485         {
1486         if (type != TLSEXT_NAMETYPE_host_name)
1487                 return NULL;
1488
1489         return s->session && !s->tlsext_hostname ?
1490                 s->session->tlsext_hostname :
1491                 s->tlsext_hostname;
1492         }
1493
1494 int SSL_get_servername_type(const SSL *s)
1495         {
1496         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1497                 return TLSEXT_NAMETYPE_host_name;
1498         return -1;
1499         }
1500
1501 # ifndef OPENSSL_NO_NEXTPROTONEG
1502 /* SSL_select_next_proto implements the standard protocol selection. It is
1503  * expected that this function is called from the callback set by
1504  * SSL_CTX_set_next_proto_select_cb.
1505  *
1506  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1507  * strings. The length byte itself is not included in the length. A byte
1508  * string of length 0 is invalid. No byte string may be truncated.
1509  *
1510  * The current, but experimental algorithm for selecting the protocol is:
1511  *
1512  * 1) If the server doesn't support NPN then this is indicated to the
1513  * callback. In this case, the client application has to abort the connection
1514  * or have a default application level protocol.
1515  *
1516  * 2) If the server supports NPN, but advertises an empty list then the
1517  * client selects the first protcol in its list, but indicates via the
1518  * API that this fallback case was enacted.
1519  *
1520  * 3) Otherwise, the client finds the first protocol in the server's list
1521  * that it supports and selects this protocol. This is because it's
1522  * assumed that the server has better information about which protocol
1523  * a client should use.
1524  *
1525  * 4) If the client doesn't support any of the server's advertised
1526  * protocols, then this is treated the same as case 2.
1527  *
1528  * It returns either
1529  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1530  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1531  */
1532 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len)
1533         {
1534         unsigned int i, j;
1535         const unsigned char *result;
1536         int status = OPENSSL_NPN_UNSUPPORTED;
1537
1538         /* For each protocol in server preference order, see if we support it. */
1539         for (i = 0; i < server_len; )
1540                 {
1541                 for (j = 0; j < client_len; )
1542                         {
1543                         if (server[i] == client[j] &&
1544                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1545                                 {
1546                                 /* We found a match */
1547                                 result = &server[i];
1548                                 status = OPENSSL_NPN_NEGOTIATED;
1549                                 goto found;
1550                                 }
1551                         j += client[j];
1552                         j++;
1553                         }
1554                 i += server[i];
1555                 i++;
1556                 }
1557
1558         /* There's no overlap between our protocols and the server's list. */
1559         result = client;
1560         status = OPENSSL_NPN_NO_OVERLAP;
1561
1562         found:
1563         *out = (unsigned char *) result + 1;
1564         *outlen = result[0];
1565         return status;
1566         }
1567
1568 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1569  * requested protocol for this connection and returns 0. If the client didn't
1570  * request any protocol, then *data is set to NULL.
1571  *
1572  * Note that the client can request any protocol it chooses. The value returned
1573  * from this function need not be a member of the list of supported protocols
1574  * provided by the callback.
1575  */
1576 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1577         {
1578         *data = s->next_proto_negotiated;
1579         if (!*data) {
1580                 *len = 0;
1581         } else {
1582                 *len = s->next_proto_negotiated_len;
1583         }
1584 }
1585
1586 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1587  * TLS server needs a list of supported protocols for Next Protocol
1588  * Negotiation. The returned list must be in wire format.  The list is returned
1589  * by setting |out| to point to it and |outlen| to its length. This memory will
1590  * not be modified, but one should assume that the SSL* keeps a reference to
1591  * it.
1592  *
1593  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1594  * such extension will be included in the ServerHello. */
1595 void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
1596         {
1597         ctx->next_protos_advertised_cb = cb;
1598         ctx->next_protos_advertised_cb_arg = arg;
1599         }
1600
1601 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1602  * client needs to select a protocol from the server's provided list. |out|
1603  * must be set to point to the selected protocol (which may be within |in|).
1604  * The length of the protocol name must be written into |outlen|. The server's
1605  * advertised protocols are provided in |in| and |inlen|. The callback can
1606  * assume that |in| is syntactically valid.
1607  *
1608  * The client must select a protocol. It is fatal to the connection if this
1609  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1610  */
1611 void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
1612         {
1613         ctx->next_proto_select_cb = cb;
1614         ctx->next_proto_select_cb_arg = arg;
1615         }
1616
1617 # endif
1618 #endif
1619
1620 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1621         {
1622         unsigned long l;
1623
1624         l=(unsigned long)
1625                 ((unsigned int) a->session_id[0]     )|
1626                 ((unsigned int) a->session_id[1]<< 8L)|
1627                 ((unsigned long)a->session_id[2]<<16L)|
1628                 ((unsigned long)a->session_id[3]<<24L);
1629         return(l);
1630         }
1631
1632 /* NB: If this function (or indeed the hash function which uses a sort of
1633  * coarser function than this one) is changed, ensure
1634  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1635  * able to construct an SSL_SESSION that will collide with any existing session
1636  * with a matching session ID. */
1637 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1638         {
1639         if (a->ssl_version != b->ssl_version)
1640                 return(1);
1641         if (a->session_id_length != b->session_id_length)
1642                 return(1);
1643         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1644         }
1645
1646 /* These wrapper functions should remain rather than redeclaring
1647  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1648  * variable. The reason is that the functions aren't static, they're exposed via
1649  * ssl.h. */
1650 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1651 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1652
1653 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1654         {
1655         SSL_CTX *ret=NULL;
1656
1657         if (meth == NULL)
1658                 {
1659                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1660                 return(NULL);
1661                 }
1662
1663         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1664                 {
1665                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1666                 goto err;
1667                 }
1668         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1669         if (ret == NULL)
1670                 goto err;
1671
1672         memset(ret,0,sizeof(SSL_CTX));
1673
1674         ret->method=meth;
1675
1676         ret->cert_store=NULL;
1677         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1678         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1679         ret->session_cache_head=NULL;
1680         ret->session_cache_tail=NULL;
1681
1682         /* We take the system default */
1683         ret->session_timeout=meth->get_timeout();
1684
1685         ret->new_session_cb=0;
1686         ret->remove_session_cb=0;
1687         ret->get_session_cb=0;
1688         ret->generate_session_id=0;
1689
1690         memset((char *)&ret->stats,0,sizeof(ret->stats));
1691
1692         ret->references=1;
1693         ret->quiet_shutdown=0;
1694
1695 /*      ret->cipher=NULL;*/
1696 /*      ret->s2->challenge=NULL;
1697         ret->master_key=NULL;
1698         ret->key_arg=NULL;
1699         ret->s2->conn_id=NULL; */
1700
1701         ret->info_callback=NULL;
1702
1703         ret->app_verify_callback=0;
1704         ret->app_verify_arg=NULL;
1705
1706         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1707         ret->read_ahead=0;
1708         ret->msg_callback=0;
1709         ret->msg_callback_arg=NULL;
1710         ret->verify_mode=SSL_VERIFY_NONE;
1711 #if 0
1712         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1713 #endif
1714         ret->sid_ctx_length=0;
1715         ret->default_verify_callback=NULL;
1716         if ((ret->cert=ssl_cert_new()) == NULL)
1717                 goto err;
1718
1719         ret->default_passwd_callback=0;
1720         ret->default_passwd_callback_userdata=NULL;
1721         ret->client_cert_cb=0;
1722         ret->app_gen_cookie_cb=0;
1723         ret->app_verify_cookie_cb=0;
1724
1725         ret->sessions=lh_SSL_SESSION_new();
1726         if (ret->sessions == NULL) goto err;
1727         ret->cert_store=X509_STORE_new();
1728         if (ret->cert_store == NULL) goto err;
1729
1730         ssl_create_cipher_list(ret->method,
1731                 &ret->cipher_list,&ret->cipher_list_by_id,
1732                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1733         if (ret->cipher_list == NULL
1734             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1735                 {
1736                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1737                 goto err2;
1738                 }
1739
1740         ret->param = X509_VERIFY_PARAM_new();
1741         if (!ret->param)
1742                 goto err;
1743
1744         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1745                 {
1746                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1747                 goto err2;
1748                 }
1749         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1750                 {
1751                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1752                 goto err2;
1753                 }
1754         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1755                 {
1756                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1757                 goto err2;
1758                 }
1759
1760         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1761                 goto err;
1762
1763         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1764
1765         ret->extra_certs=NULL;
1766         ret->comp_methods=SSL_COMP_get_compression_methods();
1767
1768         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1769
1770 #ifndef OPENSSL_NO_TLSEXT
1771         ret->tlsext_servername_callback = 0;
1772         ret->tlsext_servername_arg = NULL;
1773         /* Setup RFC4507 ticket keys */
1774         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1775                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1776                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1777                 ret->options |= SSL_OP_NO_TICKET;
1778
1779         ret->tlsext_status_cb = 0;
1780         ret->tlsext_status_arg = NULL;
1781
1782 # ifndef OPENSSL_NO_NEXTPROTONEG
1783         ret->next_protos_advertised_cb = 0;
1784         ret->next_proto_select_cb = 0;
1785 # endif
1786 #endif
1787 #ifndef OPENSSL_NO_PSK
1788         ret->psk_identity_hint=NULL;
1789         ret->psk_client_callback=NULL;
1790         ret->psk_server_callback=NULL;
1791 #endif
1792 #ifndef OPENSSL_NO_SRP
1793         SSL_CTX_SRP_CTX_init(ret);
1794 #endif
1795 #ifndef OPENSSL_NO_BUF_FREELISTS
1796         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1797         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1798         if (!ret->rbuf_freelist)
1799                 goto err;
1800         ret->rbuf_freelist->chunklen = 0;
1801         ret->rbuf_freelist->len = 0;
1802         ret->rbuf_freelist->head = NULL;
1803         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1804         if (!ret->wbuf_freelist)
1805                 {
1806                 OPENSSL_free(ret->rbuf_freelist);
1807                 goto err;
1808                 }
1809         ret->wbuf_freelist->chunklen = 0;
1810         ret->wbuf_freelist->len = 0;
1811         ret->wbuf_freelist->head = NULL;
1812 #endif
1813 #ifndef OPENSSL_NO_ENGINE
1814         ret->client_cert_engine = NULL;
1815 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1816 #define eng_strx(x)     #x
1817 #define eng_str(x)      eng_strx(x)
1818         /* Use specific client engine automatically... ignore errors */
1819         {
1820         ENGINE *eng;
1821         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1822         if (!eng)
1823                 {
1824                 ERR_clear_error();
1825                 ENGINE_load_builtin_engines();
1826                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1827                 }
1828         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1829                 ERR_clear_error();
1830         }
1831 #endif
1832 #endif
1833         /* Default is to connect to non-RI servers. When RI is more widely
1834          * deployed might change this.
1835          */
1836         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1837         /* Disable TLS v1.2 by default for now */
1838         ret->options |= SSL_OP_NO_TLSv1_2;
1839
1840         return(ret);
1841 err:
1842         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1843 err2:
1844         if (ret != NULL) SSL_CTX_free(ret);
1845         return(NULL);
1846         }
1847
1848 #if 0
1849 static void SSL_COMP_free(SSL_COMP *comp)
1850     { OPENSSL_free(comp); }
1851 #endif
1852
1853 #ifndef OPENSSL_NO_BUF_FREELISTS
1854 static void
1855 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1856         {
1857         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1858         for (ent = list->head; ent; ent = next)
1859                 {
1860                 next = ent->next;
1861                 OPENSSL_free(ent);
1862                 }
1863         OPENSSL_free(list);
1864         }
1865 #endif
1866
1867 void SSL_CTX_free(SSL_CTX *a)
1868         {
1869         int i;
1870
1871         if (a == NULL) return;
1872
1873         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1874 #ifdef REF_PRINT
1875         REF_PRINT("SSL_CTX",a);
1876 #endif
1877         if (i > 0) return;
1878 #ifdef REF_CHECK
1879         if (i < 0)
1880                 {
1881                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1882                 abort(); /* ok */
1883                 }
1884 #endif
1885
1886         if (a->param)
1887                 X509_VERIFY_PARAM_free(a->param);
1888
1889         /*
1890          * Free internal session cache. However: the remove_cb() may reference
1891          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1892          * after the sessions were flushed.
1893          * As the ex_data handling routines might also touch the session cache,
1894          * the most secure solution seems to be: empty (flush) the cache, then
1895          * free ex_data, then finally free the cache.
1896          * (See ticket [openssl.org #212].)
1897          */
1898         if (a->sessions != NULL)
1899                 SSL_CTX_flush_sessions(a,0);
1900
1901         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1902
1903         if (a->sessions != NULL)
1904                 lh_SSL_SESSION_free(a->sessions);
1905
1906         if (a->cert_store != NULL)
1907                 X509_STORE_free(a->cert_store);
1908         if (a->cipher_list != NULL)
1909                 sk_SSL_CIPHER_free(a->cipher_list);
1910         if (a->cipher_list_by_id != NULL)
1911                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1912         if (a->cert != NULL)
1913                 ssl_cert_free(a->cert);
1914         if (a->client_CA != NULL)
1915                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1916         if (a->extra_certs != NULL)
1917                 sk_X509_pop_free(a->extra_certs,X509_free);
1918 #if 0 /* This should never be done, since it removes a global database */
1919         if (a->comp_methods != NULL)
1920                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1921 #else
1922         a->comp_methods = NULL;
1923 #endif
1924
1925 #ifndef OPENSSL_NO_PSK
1926         if (a->psk_identity_hint)
1927                 OPENSSL_free(a->psk_identity_hint);
1928 #endif
1929 #ifndef OPENSSL_NO_SRP
1930         SSL_CTX_SRP_CTX_free(a);
1931 #endif
1932 #ifndef OPENSSL_NO_ENGINE
1933         if (a->client_cert_engine)
1934                 ENGINE_finish(a->client_cert_engine);
1935 #endif
1936
1937 #ifndef OPENSSL_NO_BUF_FREELISTS
1938         if (a->wbuf_freelist)
1939                 ssl_buf_freelist_free(a->wbuf_freelist);
1940         if (a->rbuf_freelist)
1941                 ssl_buf_freelist_free(a->rbuf_freelist);
1942 #endif
1943
1944         OPENSSL_free(a);
1945         }
1946
1947 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1948         {
1949         ctx->default_passwd_callback=cb;
1950         }
1951
1952 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1953         {
1954         ctx->default_passwd_callback_userdata=u;
1955         }
1956
1957 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1958         {
1959         ctx->app_verify_callback=cb;
1960         ctx->app_verify_arg=arg;
1961         }
1962
1963 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1964         {
1965         ctx->verify_mode=mode;
1966         ctx->default_verify_callback=cb;
1967         }
1968
1969 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1970         {
1971         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1972         }
1973
1974 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1975         {
1976         CERT_PKEY *cpk;
1977         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1978         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1979         int rsa_tmp_export,dh_tmp_export,kl;
1980         unsigned long mask_k,mask_a,emask_k,emask_a;
1981         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1982 #ifndef OPENSSL_NO_ECDH
1983         int have_ecdh_tmp;
1984 #endif
1985         X509 *x = NULL;
1986         EVP_PKEY *ecc_pkey = NULL;
1987         int signature_nid = 0;
1988
1989         if (c == NULL) return;
1990
1991         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1992
1993 #ifndef OPENSSL_NO_RSA
1994         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1995         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1996                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1997 #else
1998         rsa_tmp=rsa_tmp_export=0;
1999 #endif
2000 #ifndef OPENSSL_NO_DH
2001         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2002         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2003                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2004 #else
2005         dh_tmp=dh_tmp_export=0;
2006 #endif
2007
2008 #ifndef OPENSSL_NO_ECDH
2009         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2010 #endif
2011         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2012         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2013         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2014         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2015         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2016         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2017         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2018         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2019         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2020         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2021         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2022 /* FIX THIS EAY EAY EAY */
2023         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2024         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2025         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2026         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2027         mask_k=0;
2028         mask_a=0;
2029         emask_k=0;
2030         emask_a=0;
2031
2032         
2033
2034 #ifdef CIPHER_DEBUG
2035         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2036                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2037                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2038 #endif
2039         
2040         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2041         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2042                 mask_k |= SSL_kGOST;
2043                 mask_a |= SSL_aGOST01;
2044         }
2045         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2046         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2047                 mask_k |= SSL_kGOST;
2048                 mask_a |= SSL_aGOST94;
2049         }
2050
2051         if (rsa_enc || (rsa_tmp && rsa_sign))
2052                 mask_k|=SSL_kRSA;
2053         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2054                 emask_k|=SSL_kRSA;
2055
2056 #if 0
2057         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2058         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2059                 (rsa_enc || rsa_sign || dsa_sign))
2060                 mask_k|=SSL_kEDH;
2061         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2062                 (rsa_enc || rsa_sign || dsa_sign))
2063                 emask_k|=SSL_kEDH;
2064 #endif
2065
2066         if (dh_tmp_export)
2067                 emask_k|=SSL_kEDH;
2068
2069         if (dh_tmp)
2070                 mask_k|=SSL_kEDH;
2071
2072         if (dh_rsa) mask_k|=SSL_kDHr;
2073         if (dh_rsa_export) emask_k|=SSL_kDHr;
2074
2075         if (dh_dsa) mask_k|=SSL_kDHd;
2076         if (dh_dsa_export) emask_k|=SSL_kDHd;
2077
2078         if (rsa_enc || rsa_sign)
2079                 {
2080                 mask_a|=SSL_aRSA;
2081                 emask_a|=SSL_aRSA;
2082                 }
2083
2084         if (dsa_sign)
2085                 {
2086                 mask_a|=SSL_aDSS;
2087                 emask_a|=SSL_aDSS;
2088                 }
2089
2090         mask_a|=SSL_aNULL;
2091         emask_a|=SSL_aNULL;
2092
2093 #ifndef OPENSSL_NO_KRB5
2094         mask_k|=SSL_kKRB5;
2095         mask_a|=SSL_aKRB5;
2096         emask_k|=SSL_kKRB5;
2097         emask_a|=SSL_aKRB5;
2098 #endif
2099
2100         /* An ECC certificate may be usable for ECDH and/or
2101          * ECDSA cipher suites depending on the key usage extension.
2102          */
2103         if (have_ecc_cert)
2104                 {
2105                 /* This call populates extension flags (ex_flags) */
2106                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2107                 X509_check_purpose(x, -1, 0);
2108                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2109                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2110                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2111                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2112                 ecc_pkey = X509_get_pubkey(x);
2113                 ecc_pkey_size = (ecc_pkey != NULL) ?
2114                     EVP_PKEY_bits(ecc_pkey) : 0;
2115                 EVP_PKEY_free(ecc_pkey);
2116                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2117                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2118 #ifndef OPENSSL_NO_ECDH
2119                 if (ecdh_ok)
2120                         {
2121                         const char *sig = OBJ_nid2ln(signature_nid);
2122                         if (sig == NULL)
2123                                 {
2124                                 ERR_clear_error();
2125                                 sig = "unknown";
2126                                 }
2127                                 
2128                         if (strstr(sig, "WithRSA"))
2129                                 {
2130                                 mask_k|=SSL_kECDHr;
2131                                 mask_a|=SSL_aECDH;
2132                                 if (ecc_pkey_size <= 163)
2133                                         {
2134                                         emask_k|=SSL_kECDHr;
2135                                         emask_a|=SSL_aECDH;
2136                                         }
2137                                 }
2138
2139                         if (signature_nid == NID_ecdsa_with_SHA1)
2140                                 {
2141                                 mask_k|=SSL_kECDHe;
2142                                 mask_a|=SSL_aECDH;
2143                                 if (ecc_pkey_size <= 163)
2144                                         {
2145                                         emask_k|=SSL_kECDHe;
2146                                         emask_a|=SSL_aECDH;
2147                                         }
2148                                 }
2149                         }
2150 #endif
2151 #ifndef OPENSSL_NO_ECDSA
2152                 if (ecdsa_ok)
2153                         {
2154                         mask_a|=SSL_aECDSA;
2155                         emask_a|=SSL_aECDSA;
2156                         }
2157 #endif
2158                 }
2159
2160 #ifndef OPENSSL_NO_ECDH
2161         if (have_ecdh_tmp)
2162                 {
2163                 mask_k|=SSL_kEECDH;
2164                 emask_k|=SSL_kEECDH;
2165                 }
2166 #endif
2167
2168 #ifndef OPENSSL_NO_PSK
2169         mask_k |= SSL_kPSK;
2170         mask_a |= SSL_aPSK;
2171         emask_k |= SSL_kPSK;
2172         emask_a |= SSL_aPSK;
2173 #endif
2174
2175         c->mask_k=mask_k;
2176         c->mask_a=mask_a;
2177         c->export_mask_k=emask_k;
2178         c->export_mask_a=emask_a;
2179         c->valid=1;
2180         }
2181
2182 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2183 #define ku_reject(x, usage) \
2184         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2185
2186 #ifndef OPENSSL_NO_EC
2187
2188 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2189         {
2190         unsigned long alg_k, alg_a;
2191         EVP_PKEY *pkey = NULL;
2192         int keysize = 0;
2193         int signature_nid = 0;
2194         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2195
2196         alg_k = cs->algorithm_mkey;
2197         alg_a = cs->algorithm_auth;
2198
2199         if (SSL_C_IS_EXPORT(cs))
2200                 {
2201                 /* ECDH key length in export ciphers must be <= 163 bits */
2202                 pkey = X509_get_pubkey(x);
2203                 if (pkey == NULL) return 0;
2204                 keysize = EVP_PKEY_bits(pkey);
2205                 EVP_PKEY_free(pkey);
2206                 if (keysize > 163) return 0;
2207                 }
2208
2209         /* This call populates the ex_flags field correctly */
2210         X509_check_purpose(x, -1, 0);
2211         if ((x->sig_alg) && (x->sig_alg->algorithm))
2212                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2213         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2214                 {
2215                 /* key usage, if present, must allow key agreement */
2216                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2217                         {
2218                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2219                         return 0;
2220                         }
2221                 if ((alg_k & SSL_kECDHe) && s->version < TLS1_2_VERSION)
2222                         {
2223                         /* signature alg must be ECDSA */
2224                         if (signature_nid != NID_ecdsa_with_SHA1)
2225                                 {
2226                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2227                                 return 0;
2228                                 }
2229                         }
2230                 if ((alg_k & SSL_kECDHr) && s->version < TLS1_2_VERSION)
2231                         {
2232                         /* signature alg must be RSA */
2233
2234                         const char *sig = OBJ_nid2ln(signature_nid);
2235                         if (sig == NULL)
2236                                 {
2237                                 ERR_clear_error();
2238                                 sig = "unknown";
2239                                 }
2240                         if (strstr(sig, "WithRSA") == NULL)
2241                                 {
2242                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2243                                 return 0;
2244                                 }
2245                         }
2246                 }
2247         if (alg_a & SSL_aECDSA)
2248                 {
2249                 /* key usage, if present, must allow signing */
2250                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2251                         {
2252                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2253                         return 0;
2254                         }
2255                 }
2256
2257         return 1;  /* all checks are ok */
2258         }
2259
2260 #endif
2261
2262 /* THIS NEEDS CLEANING UP */
2263 X509 *ssl_get_server_send_cert(SSL *s)
2264         {
2265         unsigned long alg_k,alg_a;
2266         CERT *c;
2267         int i;
2268
2269         c=s->cert;
2270         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2271         
2272         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2273         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2274
2275         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2276                 {
2277                 /* we don't need to look at SSL_kEECDH
2278                  * since no certificate is needed for
2279                  * anon ECDH and for authenticated
2280                  * EECDH, the check for the auth
2281                  * algorithm will set i correctly
2282                  * NOTE: For ECDH-RSA, we need an ECC
2283                  * not an RSA cert but for EECDH-RSA
2284                  * we need an RSA cert. Placing the
2285                  * checks for SSL_kECDH before RSA
2286                  * checks ensures the correct cert is chosen.
2287                  */
2288                 i=SSL_PKEY_ECC;
2289                 }
2290         else if (alg_a & SSL_aECDSA)
2291                 {
2292                 i=SSL_PKEY_ECC;
2293                 }
2294         else if (alg_k & SSL_kDHr)
2295                 i=SSL_PKEY_DH_RSA;
2296         else if (alg_k & SSL_kDHd)
2297                 i=SSL_PKEY_DH_DSA;
2298         else if (alg_a & SSL_aDSS)
2299                 i=SSL_PKEY_DSA_SIGN;
2300         else if (alg_a & SSL_aRSA)
2301                 {
2302                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2303                         i=SSL_PKEY_RSA_SIGN;
2304                 else
2305                         i=SSL_PKEY_RSA_ENC;
2306                 }
2307         else if (alg_a & SSL_aKRB5)
2308                 {
2309                 /* VRS something else here? */
2310                 return(NULL);
2311                 }
2312         else if (alg_a & SSL_aGOST94) 
2313                 i=SSL_PKEY_GOST94;
2314         else if (alg_a & SSL_aGOST01)
2315                 i=SSL_PKEY_GOST01;
2316         else /* if (alg_a & SSL_aNULL) */
2317                 {
2318                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2319                 return(NULL);
2320                 }
2321         if (c->pkeys[i].x509 == NULL) return(NULL);
2322
2323         return(c->pkeys[i].x509);
2324         }
2325
2326 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2327         {
2328         unsigned long alg_a;
2329         CERT *c;
2330         int idx = -1;
2331
2332         alg_a = cipher->algorithm_auth;
2333         c=s->cert;
2334
2335         if ((alg_a & SSL_aDSS) &&
2336                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2337                 idx = SSL_PKEY_DSA_SIGN;
2338         else if (alg_a & SSL_aRSA)
2339                 {
2340                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2341                         idx = SSL_PKEY_RSA_SIGN;
2342                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2343                         idx = SSL_PKEY_RSA_ENC;
2344                 }
2345         else if ((alg_a & SSL_aECDSA) &&
2346                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2347                 idx = SSL_PKEY_ECC;
2348         if (idx == -1)
2349                 {
2350                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2351                 return(NULL);
2352                 }
2353         if (pmd)
2354                 *pmd = c->pkeys[idx].digest;
2355         return c->pkeys[idx].privatekey;
2356         }
2357
2358 void ssl_update_cache(SSL *s,int mode)
2359         {
2360         int i;
2361
2362         /* If the session_id_length is 0, we are not supposed to cache it,
2363          * and it would be rather hard to do anyway :-) */
2364         if (s->session->session_id_length == 0) return;
2365
2366         i=s->session_ctx->session_cache_mode;
2367         if ((i & mode) && (!s->hit)
2368                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2369                     || SSL_CTX_add_session(s->session_ctx,s->session))
2370                 && (s->session_ctx->new_session_cb != NULL))
2371                 {
2372                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2373                 if (!s->session_ctx->new_session_cb(s,s->session))
2374                         SSL_SESSION_free(s->session);
2375                 }
2376
2377         /* auto flush every 255 connections */
2378         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2379                 ((i & mode) == mode))
2380                 {
2381                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2382                         ?s->session_ctx->stats.sess_connect_good
2383                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2384                         {
2385                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2386                         }
2387                 }
2388         }
2389
2390 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2391         {
2392         return(s->method);
2393         }
2394
2395 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2396         {
2397         int conn= -1;
2398         int ret=1;
2399
2400         if (s->method != meth)
2401                 {
2402                 if (s->handshake_func != NULL)
2403                         conn=(s->handshake_func == s->method->ssl_connect);
2404
2405                 if (s->method->version == meth->version)
2406                         s->method=meth;
2407                 else
2408                         {
2409                         s->method->ssl_free(s);
2410                         s->method=meth;
2411                         ret=s->method->ssl_new(s);
2412                         }
2413
2414                 if (conn == 1)
2415                         s->handshake_func=meth->ssl_connect;
2416                 else if (conn == 0)
2417                         s->handshake_func=meth->ssl_accept;
2418                 }
2419         return(ret);
2420         }
2421
2422 int SSL_get_error(const SSL *s,int i)
2423         {
2424         int reason;
2425         unsigned long l;
2426         BIO *bio;
2427
2428         if (i > 0) return(SSL_ERROR_NONE);
2429
2430         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2431          * etc, where we do encode the error */
2432         if ((l=ERR_peek_error()) != 0)
2433                 {
2434                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2435                         return(SSL_ERROR_SYSCALL);
2436                 else
2437                         return(SSL_ERROR_SSL);
2438                 }
2439
2440         if ((i < 0) && SSL_want_read(s))
2441                 {
2442                 bio=SSL_get_rbio(s);
2443                 if (BIO_should_read(bio))
2444                         return(SSL_ERROR_WANT_READ);
2445                 else if (BIO_should_write(bio))
2446                         /* This one doesn't make too much sense ... We never try
2447                          * to write to the rbio, and an application program where
2448                          * rbio and wbio are separate couldn't even know what it
2449                          * should wait for.
2450                          * However if we ever set s->rwstate incorrectly
2451                          * (so that we have SSL_want_read(s) instead of
2452                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2453                          * this test works around that bug; so it might be safer
2454                          * to keep it. */
2455                         return(SSL_ERROR_WANT_WRITE);
2456                 else if (BIO_should_io_special(bio))
2457                         {
2458                         reason=BIO_get_retry_reason(bio);
2459                         if (reason == BIO_RR_CONNECT)
2460                                 return(SSL_ERROR_WANT_CONNECT);
2461                         else if (reason == BIO_RR_ACCEPT)
2462                                 return(SSL_ERROR_WANT_ACCEPT);
2463                         else
2464                                 return(SSL_ERROR_SYSCALL); /* unknown */
2465                         }
2466                 }
2467
2468         if ((i < 0) && SSL_want_write(s))
2469                 {
2470                 bio=SSL_get_wbio(s);
2471                 if (BIO_should_write(bio))
2472                         return(SSL_ERROR_WANT_WRITE);
2473                 else if (BIO_should_read(bio))
2474                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2475                         return(SSL_ERROR_WANT_READ);
2476                 else if (BIO_should_io_special(bio))
2477                         {
2478                         reason=BIO_get_retry_reason(bio);
2479                         if (reason == BIO_RR_CONNECT)
2480                                 return(SSL_ERROR_WANT_CONNECT);
2481                         else if (reason == BIO_RR_ACCEPT)
2482                                 return(SSL_ERROR_WANT_ACCEPT);
2483                         else
2484                                 return(SSL_ERROR_SYSCALL);
2485                         }
2486                 }
2487         if ((i < 0) && SSL_want_x509_lookup(s))
2488                 {
2489                 return(SSL_ERROR_WANT_X509_LOOKUP);
2490                 }
2491
2492         if (i == 0)
2493                 {
2494                 if (s->version == SSL2_VERSION)
2495                         {
2496                         /* assume it is the socket being closed */
2497                         return(SSL_ERROR_ZERO_RETURN);
2498                         }
2499                 else
2500                         {
2501                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2502                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2503                                 return(SSL_ERROR_ZERO_RETURN);
2504                         }
2505                 }
2506         return(SSL_ERROR_SYSCALL);
2507         }
2508
2509 int SSL_do_handshake(SSL *s)
2510         {
2511         int ret=1;
2512
2513         if (s->handshake_func == NULL)
2514                 {
2515                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2516                 return(-1);
2517                 }
2518
2519         s->method->ssl_renegotiate_check(s);
2520
2521         if (SSL_in_init(s) || SSL_in_before(s))
2522                 {
2523                 ret=s->handshake_func(s);
2524                 }
2525         return(ret);
2526         }
2527
2528 /* For the next 2 functions, SSL_clear() sets shutdown and so
2529  * one of these calls will reset it */
2530 void SSL_set_accept_state(SSL *s)
2531         {
2532         s->server=1;
2533         s->shutdown=0;
2534         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2535         s->handshake_func=s->method->ssl_accept;
2536         /* clear the current cipher */
2537         ssl_clear_cipher_ctx(s);
2538         ssl_clear_hash_ctx(&s->read_hash);
2539         ssl_clear_hash_ctx(&s->write_hash);
2540         }
2541
2542 void SSL_set_connect_state(SSL *s)
2543         {
2544         s->server=0;
2545         s->shutdown=0;
2546         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2547         s->handshake_func=s->method->ssl_connect;
2548         /* clear the current cipher */
2549         ssl_clear_cipher_ctx(s);
2550         ssl_clear_hash_ctx(&s->read_hash);
2551         ssl_clear_hash_ctx(&s->write_hash);
2552         }
2553
2554 int ssl_undefined_function(SSL *s)
2555         {
2556         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2557         return(0);
2558         }
2559
2560 int ssl_undefined_void_function(void)
2561         {
2562         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2563         return(0);
2564         }
2565
2566 int ssl_undefined_const_function(const SSL *s)
2567         {
2568         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2569         return(0);
2570         }
2571
2572 SSL_METHOD *ssl_bad_method(int ver)
2573         {
2574         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2575         return(NULL);
2576         }
2577
2578 const char *SSL_get_version(const SSL *s)
2579         {
2580         if (s->version == TLS1_2_VERSION)
2581                 return("TLSv1.2");
2582         else if (s->version == TLS1_1_VERSION)
2583                 return("TLSv1.1");
2584         else if (s->version == TLS1_VERSION)
2585                 return("TLSv1");
2586         else if (s->version == SSL3_VERSION)
2587                 return("SSLv3");
2588         else if (s->version == SSL2_VERSION)
2589                 return("SSLv2");
2590         else
2591                 return("unknown");
2592         }
2593
2594 SSL *SSL_dup(SSL *s)
2595         {
2596         STACK_OF(X509_NAME) *sk;
2597         X509_NAME *xn;
2598         SSL *ret;
2599         int i;
2600         
2601         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2602             return(NULL);
2603
2604         ret->version = s->version;
2605         ret->type = s->type;
2606         ret->method = s->method;
2607
2608         if (s->session != NULL)
2609                 {
2610                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2611                 SSL_copy_session_id(ret,s);
2612                 }
2613         else
2614                 {
2615                 /* No session has been established yet, so we have to expect
2616                  * that s->cert or ret->cert will be changed later --
2617                  * they should not both point to the same object,
2618                  * and thus we can't use SSL_copy_session_id. */
2619
2620                 ret->method->ssl_free(ret);
2621                 ret->method = s->method;
2622                 ret->method->ssl_new(ret);
2623
2624                 if (s->cert != NULL)
2625                         {
2626                         if (ret->cert != NULL)
2627                                 {
2628                                 ssl_cert_free(ret->cert);
2629                                 }
2630                         ret->cert = ssl_cert_dup(s->cert);
2631                         if (ret->cert == NULL)
2632                                 goto err;
2633                         }
2634                                 
2635                 SSL_set_session_id_context(ret,
2636                         s->sid_ctx, s->sid_ctx_length);
2637                 }
2638
2639         ret->options=s->options;
2640         ret->mode=s->mode;
2641         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2642         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2643         ret->msg_callback = s->msg_callback;
2644         ret->msg_callback_arg = s->msg_callback_arg;
2645         SSL_set_verify(ret,SSL_get_verify_mode(s),
2646                 SSL_get_verify_callback(s));
2647         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2648         ret->generate_session_id = s->generate_session_id;
2649
2650         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2651         
2652         ret->debug=s->debug;
2653
2654         /* copy app data, a little dangerous perhaps */
2655         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2656                 goto err;
2657
2658         /* setup rbio, and wbio */
2659         if (s->rbio != NULL)
2660                 {
2661                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2662                         goto err;
2663                 }
2664         if (s->wbio != NULL)
2665                 {
2666                 if (s->wbio != s->rbio)
2667                         {
2668                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2669                                 goto err;
2670                         }
2671                 else
2672                         ret->wbio=ret->rbio;
2673                 }
2674         ret->rwstate = s->rwstate;
2675         ret->in_handshake = s->in_handshake;
2676         ret->handshake_func = s->handshake_func;
2677         ret->server = s->server;
2678         ret->renegotiate = s->renegotiate;
2679         ret->new_session = s->new_session;
2680         ret->quiet_shutdown = s->quiet_shutdown;
2681         ret->shutdown=s->shutdown;
2682         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2683         ret->rstate=s->rstate;
2684         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2685         ret->hit=s->hit;
2686
2687         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2688
2689         /* dup the cipher_list and cipher_list_by_id stacks */
2690         if (s->cipher_list != NULL)
2691                 {
2692                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2693                         goto err;
2694                 }
2695         if (s->cipher_list_by_id != NULL)
2696                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2697                         == NULL)
2698                         goto err;
2699
2700         /* Dup the client_CA list */
2701         if (s->client_CA != NULL)
2702                 {
2703                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2704                 ret->client_CA=sk;
2705                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2706                         {
2707                         xn=sk_X509_NAME_value(sk,i);
2708                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2709                                 {
2710                                 X509_NAME_free(xn);
2711                                 goto err;
2712                                 }
2713                         }
2714                 }
2715
2716         if (0)
2717                 {
2718 err:
2719                 if (ret != NULL) SSL_free(ret);
2720                 ret=NULL;
2721                 }
2722         return(ret);
2723         }
2724
2725 void ssl_clear_cipher_ctx(SSL *s)
2726         {
2727         if (s->enc_read_ctx != NULL)
2728                 {
2729                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2730                 OPENSSL_free(s->enc_read_ctx);
2731                 s->enc_read_ctx=NULL;
2732                 }
2733         if (s->enc_write_ctx != NULL)
2734                 {
2735                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2736                 OPENSSL_free(s->enc_write_ctx);
2737                 s->enc_write_ctx=NULL;
2738                 }
2739 #ifndef OPENSSL_NO_COMP
2740         if (s->expand != NULL)
2741                 {
2742                 COMP_CTX_free(s->expand);
2743                 s->expand=NULL;
2744                 }
2745         if (s->compress != NULL)
2746                 {
2747                 COMP_CTX_free(s->compress);
2748                 s->compress=NULL;
2749                 }
2750 #endif
2751         }
2752
2753 /* Fix this function so that it takes an optional type parameter */
2754 X509 *SSL_get_certificate(const SSL *s)
2755         {
2756         if (s->cert != NULL)
2757                 return(s->cert->key->x509);
2758         else
2759                 return(NULL);
2760         }
2761
2762 /* Fix this function so that it takes an optional type parameter */
2763 EVP_PKEY *SSL_get_privatekey(SSL *s)
2764         {
2765         if (s->cert != NULL)
2766                 return(s->cert->key->privatekey);
2767         else
2768                 return(NULL);
2769         }
2770
2771 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2772         {
2773         if ((s->session != NULL) && (s->session->cipher != NULL))
2774                 return(s->session->cipher);
2775         return(NULL);
2776         }
2777 #ifdef OPENSSL_NO_COMP
2778 const void *SSL_get_current_compression(SSL *s)
2779         {
2780         return NULL;
2781         }
2782 const void *SSL_get_current_expansion(SSL *s)
2783         {
2784         return NULL;
2785         }
2786 #else
2787
2788 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2789         {
2790         if (s->compress != NULL)
2791                 return(s->compress->meth);
2792         return(NULL);
2793         }
2794
2795 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2796         {
2797         if (s->expand != NULL)
2798                 return(s->expand->meth);
2799         return(NULL);
2800         }
2801 #endif
2802
2803 int ssl_init_wbio_buffer(SSL *s,int push)
2804         {
2805         BIO *bbio;
2806
2807         if (s->bbio == NULL)
2808                 {
2809                 bbio=BIO_new(BIO_f_buffer());
2810                 if (bbio == NULL) return(0);
2811                 s->bbio=bbio;
2812                 }
2813         else
2814                 {
2815                 bbio=s->bbio;
2816                 if (s->bbio == s->wbio)
2817                         s->wbio=BIO_pop(s->wbio);
2818                 }
2819         (void)BIO_reset(bbio);
2820 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2821         if (!BIO_set_read_buffer_size(bbio,1))
2822                 {
2823                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2824                 return(0);
2825                 }
2826         if (push)
2827                 {
2828                 if (s->wbio != bbio)
2829                         s->wbio=BIO_push(bbio,s->wbio);
2830                 }
2831         else
2832                 {
2833                 if (s->wbio == bbio)
2834                         s->wbio=BIO_pop(bbio);
2835                 }
2836         return(1);
2837         }
2838
2839 void ssl_free_wbio_buffer(SSL *s)
2840         {
2841         if (s->bbio == NULL) return;
2842
2843         if (s->bbio == s->wbio)
2844                 {
2845                 /* remove buffering */
2846                 s->wbio=BIO_pop(s->wbio);
2847 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2848                 assert(s->wbio != NULL);
2849 #endif
2850         }
2851         BIO_free(s->bbio);
2852         s->bbio=NULL;
2853         }
2854         
2855 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2856         {
2857         ctx->quiet_shutdown=mode;
2858         }
2859
2860 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2861         {
2862         return(ctx->quiet_shutdown);
2863         }
2864
2865 void SSL_set_quiet_shutdown(SSL *s,int mode)
2866         {
2867         s->quiet_shutdown=mode;
2868         }
2869
2870 int SSL_get_quiet_shutdown(const SSL *s)
2871         {
2872         return(s->quiet_shutdown);
2873         }
2874
2875 void SSL_set_shutdown(SSL *s,int mode)
2876         {
2877         s->shutdown=mode;
2878         }
2879
2880 int SSL_get_shutdown(const SSL *s)
2881         {
2882         return(s->shutdown);
2883         }
2884
2885 int SSL_version(const SSL *s)
2886         {
2887         return(s->version);
2888         }
2889
2890 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2891         {
2892         return(ssl->ctx);
2893         }
2894
2895 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2896         {
2897         if (ssl->ctx == ctx)
2898                 return ssl->ctx;
2899 #ifndef OPENSSL_NO_TLSEXT
2900         if (ctx == NULL)
2901                 ctx = ssl->initial_ctx;
2902 #endif
2903         if (ssl->cert != NULL)
2904                 ssl_cert_free(ssl->cert);
2905         ssl->cert = ssl_cert_dup(ctx->cert);
2906         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2907         if (ssl->ctx != NULL)
2908                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2909         ssl->ctx = ctx;
2910         return(ssl->ctx);
2911         }
2912
2913 #ifndef OPENSSL_NO_STDIO
2914 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2915         {
2916         return(X509_STORE_set_default_paths(ctx->cert_store));
2917         }
2918
2919 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2920                 const char *CApath)
2921         {
2922         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2923         }
2924 #endif
2925
2926 void SSL_set_info_callback(SSL *ssl,
2927         void (*cb)(const SSL *ssl,int type,int val))
2928         {
2929         ssl->info_callback=cb;
2930         }
2931
2932 /* One compiler (Diab DCC) doesn't like argument names in returned
2933    function pointer.  */
2934 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2935         {
2936         return ssl->info_callback;
2937         }
2938
2939 int SSL_state(const SSL *ssl)
2940         {
2941         return(ssl->state);
2942         }
2943
2944 void SSL_set_state(SSL *ssl, int state)
2945         {
2946         ssl->state = state;
2947         }
2948
2949 void SSL_set_verify_result(SSL *ssl,long arg)
2950         {
2951         ssl->verify_result=arg;
2952         }
2953
2954 long SSL_get_verify_result(const SSL *ssl)
2955         {
2956         return(ssl->verify_result);
2957         }
2958
2959 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2960                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2961         {
2962         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2963                                 new_func, dup_func, free_func);
2964         }
2965
2966 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2967         {
2968         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2969         }
2970
2971 void *SSL_get_ex_data(const SSL *s,int idx)
2972         {
2973         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2974         }
2975
2976 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2977                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2978         {
2979         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2980                                 new_func, dup_func, free_func);
2981         }
2982
2983 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2984         {
2985         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2986         }
2987
2988 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2989         {
2990         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2991         }
2992
2993 int ssl_ok(SSL *s)
2994         {
2995         return(1);
2996         }
2997
2998 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2999         {
3000         return(ctx->cert_store);
3001         }
3002
3003 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3004         {
3005         if (ctx->cert_store != NULL)
3006                 X509_STORE_free(ctx->cert_store);
3007         ctx->cert_store=store;
3008         }
3009
3010 int SSL_want(const SSL *s)
3011         {
3012         return(s->rwstate);
3013         }
3014
3015 /*!
3016  * \brief Set the callback for generating temporary RSA keys.
3017  * \param ctx the SSL context.
3018  * \param cb the callback
3019  */
3020
3021 #ifndef OPENSSL_NO_RSA
3022 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3023                                                           int is_export,
3024                                                           int keylength))
3025     {
3026     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3027     }
3028
3029 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3030                                                   int is_export,
3031                                                   int keylength))
3032     {
3033     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3034     }
3035 #endif
3036
3037 #ifdef DOXYGEN
3038 /*!
3039  * \brief The RSA temporary key callback function.
3040  * \param ssl the SSL session.
3041  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3042  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3043  * of the required key in bits.
3044  * \return the temporary RSA key.
3045  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3046  */
3047
3048 RSA *cb(SSL *ssl,int is_export,int keylength)
3049     {}
3050 #endif
3051
3052 /*!
3053  * \brief Set the callback for generating temporary DH keys.
3054  * \param ctx the SSL context.
3055  * \param dh the callback
3056  */
3057
3058 #ifndef OPENSSL_NO_DH
3059 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3060                                                         int keylength))
3061         {
3062         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3063         }
3064
3065 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3066                                                 int keylength))
3067         {
3068         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3069         }
3070 #endif
3071
3072 #ifndef OPENSSL_NO_ECDH
3073 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3074                                                                 int keylength))
3075         {
3076         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3077         }
3078
3079 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3080                                                         int keylength))
3081         {
3082         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3083         }
3084 #endif
3085
3086 #ifndef OPENSSL_NO_PSK
3087 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3088         {
3089         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3090                 {
3091                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3092                 return 0;
3093                 }
3094         if (ctx->psk_identity_hint != NULL)
3095                 OPENSSL_free(ctx->psk_identity_hint);
3096         if (identity_hint != NULL)
3097                 {
3098                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3099                 if (ctx->psk_identity_hint == NULL)
3100                         return 0;
3101                 }
3102         else
3103                 ctx->psk_identity_hint = NULL;
3104         return 1;
3105         }
3106
3107 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3108         {
3109         if (s == NULL)
3110                 return 0;
3111
3112         if (s->session == NULL)
3113                 return 1; /* session not created yet, ignored */
3114
3115         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3116                 {
3117                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3118                 return 0;
3119                 }
3120         if (s->session->psk_identity_hint != NULL)
3121                 OPENSSL_free(s->session->psk_identity_hint);
3122         if (identity_hint != NULL)
3123                 {
3124                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3125                 if (s->session->psk_identity_hint == NULL)
3126                         return 0;
3127                 }
3128         else
3129                 s->session->psk_identity_hint = NULL;
3130         return 1;
3131         }
3132
3133 const char *SSL_get_psk_identity_hint(const SSL *s)
3134         {
3135         if (s == NULL || s->session == NULL)
3136                 return NULL;
3137         return(s->session->psk_identity_hint);
3138         }
3139
3140 const char *SSL_get_psk_identity(const SSL *s)
3141         {
3142         if (s == NULL || s->session == NULL)
3143                 return NULL;
3144         return(s->session->psk_identity);
3145         }
3146
3147 void SSL_set_psk_client_callback(SSL *s,
3148     unsigned int (*cb)(SSL *ssl, const char *hint,
3149                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3150                        unsigned int max_psk_len))
3151         {
3152         s->psk_client_callback = cb;
3153         }
3154
3155 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3156     unsigned int (*cb)(SSL *ssl, const char *hint,
3157                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3158                        unsigned int max_psk_len))
3159         {
3160         ctx->psk_client_callback = cb;
3161         }
3162
3163 void SSL_set_psk_server_callback(SSL *s,
3164     unsigned int (*cb)(SSL *ssl, const char *identity,
3165                        unsigned char *psk, unsigned int max_psk_len))
3166         {
3167         s->psk_server_callback = cb;
3168         }
3169
3170 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3171     unsigned int (*cb)(SSL *ssl, const char *identity,
3172                        unsigned char *psk, unsigned int max_psk_len))
3173         {
3174         ctx->psk_server_callback = cb;
3175         }
3176 #endif
3177
3178 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))
3179         {
3180         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3181         }
3182 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))
3183         {
3184         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3185         }
3186
3187 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3188         int (*cb)(SSL *ssl, int is_forward_secure))
3189         {
3190         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3191                 (void (*)(void))cb);
3192         }
3193 void SSL_set_not_resumable_session_callback(SSL *ssl,
3194         int (*cb)(SSL *ssl, int is_forward_secure))
3195         {
3196         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3197                 (void (*)(void))cb);
3198         }
3199
3200 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3201  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3202  * any. If EVP_MD pointer is passed, initializes ctx with this md
3203  * Returns newly allocated ctx;
3204  */
3205
3206 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
3207 {
3208         ssl_clear_hash_ctx(hash);
3209         *hash = EVP_MD_CTX_create();
3210         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3211         return *hash;
3212 }
3213 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
3214 {
3215
3216         if (*hash) EVP_MD_CTX_destroy(*hash);
3217         *hash=NULL;
3218 }
3219
3220 void SSL_set_debug(SSL *s, int debug)
3221         {
3222         s->debug = debug;
3223         }
3224
3225 int SSL_cache_hit(SSL *s)
3226         {
3227         return s->hit;
3228         }
3229
3230 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3231 #include "../crypto/bio/bss_file.c"
3232 #endif
3233
3234 IMPLEMENT_STACK_OF(SSL_CIPHER)
3235 IMPLEMENT_STACK_OF(SSL_COMP)
3236 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3237                                     ssl_cipher_id);
3238