PR: 2457
[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
1838         return(ret);
1839 err:
1840         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1841 err2:
1842         if (ret != NULL) SSL_CTX_free(ret);
1843         return(NULL);
1844         }
1845
1846 #if 0
1847 static void SSL_COMP_free(SSL_COMP *comp)
1848     { OPENSSL_free(comp); }
1849 #endif
1850
1851 #ifndef OPENSSL_NO_BUF_FREELISTS
1852 static void
1853 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1854         {
1855         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1856         for (ent = list->head; ent; ent = next)
1857                 {
1858                 next = ent->next;
1859                 OPENSSL_free(ent);
1860                 }
1861         OPENSSL_free(list);
1862         }
1863 #endif
1864
1865 void SSL_CTX_free(SSL_CTX *a)
1866         {
1867         int i;
1868
1869         if (a == NULL) return;
1870
1871         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1872 #ifdef REF_PRINT
1873         REF_PRINT("SSL_CTX",a);
1874 #endif
1875         if (i > 0) return;
1876 #ifdef REF_CHECK
1877         if (i < 0)
1878                 {
1879                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1880                 abort(); /* ok */
1881                 }
1882 #endif
1883
1884         if (a->param)
1885                 X509_VERIFY_PARAM_free(a->param);
1886
1887         /*
1888          * Free internal session cache. However: the remove_cb() may reference
1889          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1890          * after the sessions were flushed.
1891          * As the ex_data handling routines might also touch the session cache,
1892          * the most secure solution seems to be: empty (flush) the cache, then
1893          * free ex_data, then finally free the cache.
1894          * (See ticket [openssl.org #212].)
1895          */
1896         if (a->sessions != NULL)
1897                 SSL_CTX_flush_sessions(a,0);
1898
1899         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1900
1901         if (a->sessions != NULL)
1902                 lh_SSL_SESSION_free(a->sessions);
1903
1904         if (a->cert_store != NULL)
1905                 X509_STORE_free(a->cert_store);
1906         if (a->cipher_list != NULL)
1907                 sk_SSL_CIPHER_free(a->cipher_list);
1908         if (a->cipher_list_by_id != NULL)
1909                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1910         if (a->cert != NULL)
1911                 ssl_cert_free(a->cert);
1912         if (a->client_CA != NULL)
1913                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1914         if (a->extra_certs != NULL)
1915                 sk_X509_pop_free(a->extra_certs,X509_free);
1916 #if 0 /* This should never be done, since it removes a global database */
1917         if (a->comp_methods != NULL)
1918                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1919 #else
1920         a->comp_methods = NULL;
1921 #endif
1922
1923 #ifndef OPENSSL_NO_PSK
1924         if (a->psk_identity_hint)
1925                 OPENSSL_free(a->psk_identity_hint);
1926 #endif
1927 #ifndef OPENSSL_NO_SRP
1928         SSL_CTX_SRP_CTX_free(a);
1929 #endif
1930 #ifndef OPENSSL_NO_ENGINE
1931         if (a->client_cert_engine)
1932                 ENGINE_finish(a->client_cert_engine);
1933 #endif
1934
1935 #ifndef OPENSSL_NO_BUF_FREELISTS
1936         if (a->wbuf_freelist)
1937                 ssl_buf_freelist_free(a->wbuf_freelist);
1938         if (a->rbuf_freelist)
1939                 ssl_buf_freelist_free(a->rbuf_freelist);
1940 #endif
1941
1942         OPENSSL_free(a);
1943         }
1944
1945 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1946         {
1947         ctx->default_passwd_callback=cb;
1948         }
1949
1950 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1951         {
1952         ctx->default_passwd_callback_userdata=u;
1953         }
1954
1955 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1956         {
1957         ctx->app_verify_callback=cb;
1958         ctx->app_verify_arg=arg;
1959         }
1960
1961 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1962         {
1963         ctx->verify_mode=mode;
1964         ctx->default_verify_callback=cb;
1965         }
1966
1967 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1968         {
1969         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1970         }
1971
1972 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1973         {
1974         CERT_PKEY *cpk;
1975         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1976         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1977         int rsa_tmp_export,dh_tmp_export,kl;
1978         unsigned long mask_k,mask_a,emask_k,emask_a;
1979         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1980 #ifndef OPENSSL_NO_ECDH
1981         int have_ecdh_tmp;
1982 #endif
1983         X509 *x = NULL;
1984         EVP_PKEY *ecc_pkey = NULL;
1985         int signature_nid = 0;
1986
1987         if (c == NULL) return;
1988
1989         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1990
1991 #ifndef OPENSSL_NO_RSA
1992         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1993         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1994                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1995 #else
1996         rsa_tmp=rsa_tmp_export=0;
1997 #endif
1998 #ifndef OPENSSL_NO_DH
1999         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2000         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2001                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2002 #else
2003         dh_tmp=dh_tmp_export=0;
2004 #endif
2005
2006 #ifndef OPENSSL_NO_ECDH
2007         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2008 #endif
2009         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2010         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2011         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2012         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2013         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2014         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2015         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2016         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2017         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2018         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2019         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2020 /* FIX THIS EAY EAY EAY */
2021         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2022         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2023         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2024         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2025         mask_k=0;
2026         mask_a=0;
2027         emask_k=0;
2028         emask_a=0;
2029
2030         
2031
2032 #ifdef CIPHER_DEBUG
2033         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2034                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2035                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2036 #endif
2037         
2038         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2039         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2040                 mask_k |= SSL_kGOST;
2041                 mask_a |= SSL_aGOST01;
2042         }
2043         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2044         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2045                 mask_k |= SSL_kGOST;
2046                 mask_a |= SSL_aGOST94;
2047         }
2048
2049         if (rsa_enc || (rsa_tmp && rsa_sign))
2050                 mask_k|=SSL_kRSA;
2051         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2052                 emask_k|=SSL_kRSA;
2053
2054 #if 0
2055         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2056         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2057                 (rsa_enc || rsa_sign || dsa_sign))
2058                 mask_k|=SSL_kEDH;
2059         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2060                 (rsa_enc || rsa_sign || dsa_sign))
2061                 emask_k|=SSL_kEDH;
2062 #endif
2063
2064         if (dh_tmp_export)
2065                 emask_k|=SSL_kEDH;
2066
2067         if (dh_tmp)
2068                 mask_k|=SSL_kEDH;
2069
2070         if (dh_rsa) mask_k|=SSL_kDHr;
2071         if (dh_rsa_export) emask_k|=SSL_kDHr;
2072
2073         if (dh_dsa) mask_k|=SSL_kDHd;
2074         if (dh_dsa_export) emask_k|=SSL_kDHd;
2075
2076         if (rsa_enc || rsa_sign)
2077                 {
2078                 mask_a|=SSL_aRSA;
2079                 emask_a|=SSL_aRSA;
2080                 }
2081
2082         if (dsa_sign)
2083                 {
2084                 mask_a|=SSL_aDSS;
2085                 emask_a|=SSL_aDSS;
2086                 }
2087
2088         mask_a|=SSL_aNULL;
2089         emask_a|=SSL_aNULL;
2090
2091 #ifndef OPENSSL_NO_KRB5
2092         mask_k|=SSL_kKRB5;
2093         mask_a|=SSL_aKRB5;
2094         emask_k|=SSL_kKRB5;
2095         emask_a|=SSL_aKRB5;
2096 #endif
2097
2098         /* An ECC certificate may be usable for ECDH and/or
2099          * ECDSA cipher suites depending on the key usage extension.
2100          */
2101         if (have_ecc_cert)
2102                 {
2103                 /* This call populates extension flags (ex_flags) */
2104                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2105                 X509_check_purpose(x, -1, 0);
2106                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2107                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2108                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2109                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2110                 ecc_pkey = X509_get_pubkey(x);
2111                 ecc_pkey_size = (ecc_pkey != NULL) ?
2112                     EVP_PKEY_bits(ecc_pkey) : 0;
2113                 EVP_PKEY_free(ecc_pkey);
2114                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2115                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2116 #ifndef OPENSSL_NO_ECDH
2117                 if (ecdh_ok)
2118                         {
2119                         const char *sig = OBJ_nid2ln(signature_nid);
2120                         if (sig == NULL)
2121                                 {
2122                                 ERR_clear_error();
2123                                 sig = "unknown";
2124                                 }
2125                                 
2126                         if (strstr(sig, "WithRSA"))
2127                                 {
2128                                 mask_k|=SSL_kECDHr;
2129                                 mask_a|=SSL_aECDH;
2130                                 if (ecc_pkey_size <= 163)
2131                                         {
2132                                         emask_k|=SSL_kECDHr;
2133                                         emask_a|=SSL_aECDH;
2134                                         }
2135                                 }
2136
2137                         if (signature_nid == NID_ecdsa_with_SHA1)
2138                                 {
2139                                 mask_k|=SSL_kECDHe;
2140                                 mask_a|=SSL_aECDH;
2141                                 if (ecc_pkey_size <= 163)
2142                                         {
2143                                         emask_k|=SSL_kECDHe;
2144                                         emask_a|=SSL_aECDH;
2145                                         }
2146                                 }
2147                         }
2148 #endif
2149 #ifndef OPENSSL_NO_ECDSA
2150                 if (ecdsa_ok)
2151                         {
2152                         mask_a|=SSL_aECDSA;
2153                         emask_a|=SSL_aECDSA;
2154                         }
2155 #endif
2156                 }
2157
2158 #ifndef OPENSSL_NO_ECDH
2159         if (have_ecdh_tmp)
2160                 {
2161                 mask_k|=SSL_kEECDH;
2162                 emask_k|=SSL_kEECDH;
2163                 }
2164 #endif
2165
2166 #ifndef OPENSSL_NO_PSK
2167         mask_k |= SSL_kPSK;
2168         mask_a |= SSL_aPSK;
2169         emask_k |= SSL_kPSK;
2170         emask_a |= SSL_aPSK;
2171 #endif
2172
2173         c->mask_k=mask_k;
2174         c->mask_a=mask_a;
2175         c->export_mask_k=emask_k;
2176         c->export_mask_a=emask_a;
2177         c->valid=1;
2178         }
2179
2180 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2181 #define ku_reject(x, usage) \
2182         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2183
2184 #ifndef OPENSSL_NO_EC
2185
2186 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
2187         {
2188         unsigned long alg_k, alg_a;
2189         EVP_PKEY *pkey = NULL;
2190         int keysize = 0;
2191         int signature_nid = 0;
2192
2193         alg_k = cs->algorithm_mkey;
2194         alg_a = cs->algorithm_auth;
2195
2196         if (SSL_C_IS_EXPORT(cs))
2197                 {
2198                 /* ECDH key length in export ciphers must be <= 163 bits */
2199                 pkey = X509_get_pubkey(x);
2200                 if (pkey == NULL) return 0;
2201                 keysize = EVP_PKEY_bits(pkey);
2202                 EVP_PKEY_free(pkey);
2203                 if (keysize > 163) return 0;
2204                 }
2205
2206         /* This call populates the ex_flags field correctly */
2207         X509_check_purpose(x, -1, 0);
2208         if ((x->sig_alg) && (x->sig_alg->algorithm))
2209                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2210         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2211                 {
2212                 /* key usage, if present, must allow key agreement */
2213                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2214                         {
2215                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2216                         return 0;
2217                         }
2218                 if (alg_k & SSL_kECDHe)
2219                         {
2220                         /* signature alg must be ECDSA */
2221                         if (signature_nid != NID_ecdsa_with_SHA1)
2222                                 {
2223                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2224                                 return 0;
2225                                 }
2226                         }
2227                 if (alg_k & SSL_kECDHr)
2228                         {
2229                         /* signature alg must be RSA */
2230
2231                         const char *sig = OBJ_nid2ln(signature_nid);
2232                         if (sig == NULL)
2233                                 {
2234                                 ERR_clear_error();
2235                                 sig = "unknown";
2236                                 }
2237                         if (strstr(sig, "WithRSA") == NULL)
2238                                 {
2239                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2240                                 return 0;
2241                                 }
2242                         }
2243                 }
2244         if (alg_a & SSL_aECDSA)
2245                 {
2246                 /* key usage, if present, must allow signing */
2247                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2248                         {
2249                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2250                         return 0;
2251                         }
2252                 }
2253
2254         return 1;  /* all checks are ok */
2255         }
2256
2257 #endif
2258
2259 /* THIS NEEDS CLEANING UP */
2260 X509 *ssl_get_server_send_cert(SSL *s)
2261         {
2262         unsigned long alg_k,alg_a;
2263         CERT *c;
2264         int i;
2265
2266         c=s->cert;
2267         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2268         
2269         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2270         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2271
2272         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2273                 {
2274                 /* we don't need to look at SSL_kEECDH
2275                  * since no certificate is needed for
2276                  * anon ECDH and for authenticated
2277                  * EECDH, the check for the auth
2278                  * algorithm will set i correctly
2279                  * NOTE: For ECDH-RSA, we need an ECC
2280                  * not an RSA cert but for EECDH-RSA
2281                  * we need an RSA cert. Placing the
2282                  * checks for SSL_kECDH before RSA
2283                  * checks ensures the correct cert is chosen.
2284                  */
2285                 i=SSL_PKEY_ECC;
2286                 }
2287         else if (alg_a & SSL_aECDSA)
2288                 {
2289                 i=SSL_PKEY_ECC;
2290                 }
2291         else if (alg_k & SSL_kDHr)
2292                 i=SSL_PKEY_DH_RSA;
2293         else if (alg_k & SSL_kDHd)
2294                 i=SSL_PKEY_DH_DSA;
2295         else if (alg_a & SSL_aDSS)
2296                 i=SSL_PKEY_DSA_SIGN;
2297         else if (alg_a & SSL_aRSA)
2298                 {
2299                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2300                         i=SSL_PKEY_RSA_SIGN;
2301                 else
2302                         i=SSL_PKEY_RSA_ENC;
2303                 }
2304         else if (alg_a & SSL_aKRB5)
2305                 {
2306                 /* VRS something else here? */
2307                 return(NULL);
2308                 }
2309         else if (alg_a & SSL_aGOST94) 
2310                 i=SSL_PKEY_GOST94;
2311         else if (alg_a & SSL_aGOST01)
2312                 i=SSL_PKEY_GOST01;
2313         else /* if (alg_a & SSL_aNULL) */
2314                 {
2315                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2316                 return(NULL);
2317                 }
2318         if (c->pkeys[i].x509 == NULL) return(NULL);
2319
2320         return(c->pkeys[i].x509);
2321         }
2322
2323 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2324         {
2325         unsigned long alg_a;
2326         CERT *c;
2327
2328         alg_a = cipher->algorithm_auth;
2329         c=s->cert;
2330
2331         if ((alg_a & SSL_aDSS) &&
2332                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2333                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2334         else if (alg_a & SSL_aRSA)
2335                 {
2336                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2337                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2338                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2339                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2340                 else
2341                         return(NULL);
2342                 }
2343         else if ((alg_a & SSL_aECDSA) &&
2344                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2345                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2346         else /* if (alg_a & SSL_aNULL) */
2347                 {
2348                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2349                 return(NULL);
2350                 }
2351         }
2352
2353 void ssl_update_cache(SSL *s,int mode)
2354         {
2355         int i;
2356
2357         /* If the session_id_length is 0, we are not supposed to cache it,
2358          * and it would be rather hard to do anyway :-) */
2359         if (s->session->session_id_length == 0) return;
2360
2361         i=s->session_ctx->session_cache_mode;
2362         if ((i & mode) && (!s->hit)
2363                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2364                     || SSL_CTX_add_session(s->session_ctx,s->session))
2365                 && (s->session_ctx->new_session_cb != NULL))
2366                 {
2367                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2368                 if (!s->session_ctx->new_session_cb(s,s->session))
2369                         SSL_SESSION_free(s->session);
2370                 }
2371
2372         /* auto flush every 255 connections */
2373         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2374                 ((i & mode) == mode))
2375                 {
2376                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2377                         ?s->session_ctx->stats.sess_connect_good
2378                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2379                         {
2380                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2381                         }
2382                 }
2383         }
2384
2385 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2386         {
2387         return(s->method);
2388         }
2389
2390 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2391         {
2392         int conn= -1;
2393         int ret=1;
2394
2395         if (s->method != meth)
2396                 {
2397                 if (s->handshake_func != NULL)
2398                         conn=(s->handshake_func == s->method->ssl_connect);
2399
2400                 if (s->method->version == meth->version)
2401                         s->method=meth;
2402                 else
2403                         {
2404                         s->method->ssl_free(s);
2405                         s->method=meth;
2406                         ret=s->method->ssl_new(s);
2407                         }
2408
2409                 if (conn == 1)
2410                         s->handshake_func=meth->ssl_connect;
2411                 else if (conn == 0)
2412                         s->handshake_func=meth->ssl_accept;
2413                 }
2414         return(ret);
2415         }
2416
2417 int SSL_get_error(const SSL *s,int i)
2418         {
2419         int reason;
2420         unsigned long l;
2421         BIO *bio;
2422
2423         if (i > 0) return(SSL_ERROR_NONE);
2424
2425         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2426          * etc, where we do encode the error */
2427         if ((l=ERR_peek_error()) != 0)
2428                 {
2429                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2430                         return(SSL_ERROR_SYSCALL);
2431                 else
2432                         return(SSL_ERROR_SSL);
2433                 }
2434
2435         if ((i < 0) && SSL_want_read(s))
2436                 {
2437                 bio=SSL_get_rbio(s);
2438                 if (BIO_should_read(bio))
2439                         return(SSL_ERROR_WANT_READ);
2440                 else if (BIO_should_write(bio))
2441                         /* This one doesn't make too much sense ... We never try
2442                          * to write to the rbio, and an application program where
2443                          * rbio and wbio are separate couldn't even know what it
2444                          * should wait for.
2445                          * However if we ever set s->rwstate incorrectly
2446                          * (so that we have SSL_want_read(s) instead of
2447                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2448                          * this test works around that bug; so it might be safer
2449                          * to keep it. */
2450                         return(SSL_ERROR_WANT_WRITE);
2451                 else if (BIO_should_io_special(bio))
2452                         {
2453                         reason=BIO_get_retry_reason(bio);
2454                         if (reason == BIO_RR_CONNECT)
2455                                 return(SSL_ERROR_WANT_CONNECT);
2456                         else if (reason == BIO_RR_ACCEPT)
2457                                 return(SSL_ERROR_WANT_ACCEPT);
2458                         else
2459                                 return(SSL_ERROR_SYSCALL); /* unknown */
2460                         }
2461                 }
2462
2463         if ((i < 0) && SSL_want_write(s))
2464                 {
2465                 bio=SSL_get_wbio(s);
2466                 if (BIO_should_write(bio))
2467                         return(SSL_ERROR_WANT_WRITE);
2468                 else if (BIO_should_read(bio))
2469                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2470                         return(SSL_ERROR_WANT_READ);
2471                 else if (BIO_should_io_special(bio))
2472                         {
2473                         reason=BIO_get_retry_reason(bio);
2474                         if (reason == BIO_RR_CONNECT)
2475                                 return(SSL_ERROR_WANT_CONNECT);
2476                         else if (reason == BIO_RR_ACCEPT)
2477                                 return(SSL_ERROR_WANT_ACCEPT);
2478                         else
2479                                 return(SSL_ERROR_SYSCALL);
2480                         }
2481                 }
2482         if ((i < 0) && SSL_want_x509_lookup(s))
2483                 {
2484                 return(SSL_ERROR_WANT_X509_LOOKUP);
2485                 }
2486
2487         if (i == 0)
2488                 {
2489                 if (s->version == SSL2_VERSION)
2490                         {
2491                         /* assume it is the socket being closed */
2492                         return(SSL_ERROR_ZERO_RETURN);
2493                         }
2494                 else
2495                         {
2496                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2497                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2498                                 return(SSL_ERROR_ZERO_RETURN);
2499                         }
2500                 }
2501         return(SSL_ERROR_SYSCALL);
2502         }
2503
2504 int SSL_do_handshake(SSL *s)
2505         {
2506         int ret=1;
2507
2508         if (s->handshake_func == NULL)
2509                 {
2510                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2511                 return(-1);
2512                 }
2513
2514         s->method->ssl_renegotiate_check(s);
2515
2516         if (SSL_in_init(s) || SSL_in_before(s))
2517                 {
2518                 ret=s->handshake_func(s);
2519                 }
2520         return(ret);
2521         }
2522
2523 /* For the next 2 functions, SSL_clear() sets shutdown and so
2524  * one of these calls will reset it */
2525 void SSL_set_accept_state(SSL *s)
2526         {
2527         s->server=1;
2528         s->shutdown=0;
2529         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2530         s->handshake_func=s->method->ssl_accept;
2531         /* clear the current cipher */
2532         ssl_clear_cipher_ctx(s);
2533         ssl_clear_hash_ctx(&s->read_hash);
2534         ssl_clear_hash_ctx(&s->write_hash);
2535         }
2536
2537 void SSL_set_connect_state(SSL *s)
2538         {
2539         s->server=0;
2540         s->shutdown=0;
2541         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2542         s->handshake_func=s->method->ssl_connect;
2543         /* clear the current cipher */
2544         ssl_clear_cipher_ctx(s);
2545         ssl_clear_hash_ctx(&s->read_hash);
2546         ssl_clear_hash_ctx(&s->write_hash);
2547         }
2548
2549 int ssl_undefined_function(SSL *s)
2550         {
2551         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2552         return(0);
2553         }
2554
2555 int ssl_undefined_void_function(void)
2556         {
2557         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2558         return(0);
2559         }
2560
2561 int ssl_undefined_const_function(const SSL *s)
2562         {
2563         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2564         return(0);
2565         }
2566
2567 SSL_METHOD *ssl_bad_method(int ver)
2568         {
2569         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2570         return(NULL);
2571         }
2572
2573 const char *SSL_get_version(const SSL *s)
2574         {
2575         if (s->version == TLS1_1_VERSION)
2576                 return("TLSv1.1");
2577         else if (s->version == TLS1_VERSION)
2578                 return("TLSv1");
2579         else if (s->version == SSL3_VERSION)
2580                 return("SSLv3");
2581         else if (s->version == SSL2_VERSION)
2582                 return("SSLv2");
2583         else
2584                 return("unknown");
2585         }
2586
2587 SSL *SSL_dup(SSL *s)
2588         {
2589         STACK_OF(X509_NAME) *sk;
2590         X509_NAME *xn;
2591         SSL *ret;
2592         int i;
2593         
2594         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2595             return(NULL);
2596
2597         ret->version = s->version;
2598         ret->type = s->type;
2599         ret->method = s->method;
2600
2601         if (s->session != NULL)
2602                 {
2603                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2604                 SSL_copy_session_id(ret,s);
2605                 }
2606         else
2607                 {
2608                 /* No session has been established yet, so we have to expect
2609                  * that s->cert or ret->cert will be changed later --
2610                  * they should not both point to the same object,
2611                  * and thus we can't use SSL_copy_session_id. */
2612
2613                 ret->method->ssl_free(ret);
2614                 ret->method = s->method;
2615                 ret->method->ssl_new(ret);
2616
2617                 if (s->cert != NULL)
2618                         {
2619                         if (ret->cert != NULL)
2620                                 {
2621                                 ssl_cert_free(ret->cert);
2622                                 }
2623                         ret->cert = ssl_cert_dup(s->cert);
2624                         if (ret->cert == NULL)
2625                                 goto err;
2626                         }
2627                                 
2628                 SSL_set_session_id_context(ret,
2629                         s->sid_ctx, s->sid_ctx_length);
2630                 }
2631
2632         ret->options=s->options;
2633         ret->mode=s->mode;
2634         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2635         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2636         ret->msg_callback = s->msg_callback;
2637         ret->msg_callback_arg = s->msg_callback_arg;
2638         SSL_set_verify(ret,SSL_get_verify_mode(s),
2639                 SSL_get_verify_callback(s));
2640         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2641         ret->generate_session_id = s->generate_session_id;
2642
2643         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2644         
2645         ret->debug=s->debug;
2646
2647         /* copy app data, a little dangerous perhaps */
2648         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2649                 goto err;
2650
2651         /* setup rbio, and wbio */
2652         if (s->rbio != NULL)
2653                 {
2654                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2655                         goto err;
2656                 }
2657         if (s->wbio != NULL)
2658                 {
2659                 if (s->wbio != s->rbio)
2660                         {
2661                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2662                                 goto err;
2663                         }
2664                 else
2665                         ret->wbio=ret->rbio;
2666                 }
2667         ret->rwstate = s->rwstate;
2668         ret->in_handshake = s->in_handshake;
2669         ret->handshake_func = s->handshake_func;
2670         ret->server = s->server;
2671         ret->renegotiate = s->renegotiate;
2672         ret->new_session = s->new_session;
2673         ret->quiet_shutdown = s->quiet_shutdown;
2674         ret->shutdown=s->shutdown;
2675         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2676         ret->rstate=s->rstate;
2677         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2678         ret->hit=s->hit;
2679
2680         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2681
2682         /* dup the cipher_list and cipher_list_by_id stacks */
2683         if (s->cipher_list != NULL)
2684                 {
2685                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2686                         goto err;
2687                 }
2688         if (s->cipher_list_by_id != NULL)
2689                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2690                         == NULL)
2691                         goto err;
2692
2693         /* Dup the client_CA list */
2694         if (s->client_CA != NULL)
2695                 {
2696                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2697                 ret->client_CA=sk;
2698                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2699                         {
2700                         xn=sk_X509_NAME_value(sk,i);
2701                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2702                                 {
2703                                 X509_NAME_free(xn);
2704                                 goto err;
2705                                 }
2706                         }
2707                 }
2708
2709         if (0)
2710                 {
2711 err:
2712                 if (ret != NULL) SSL_free(ret);
2713                 ret=NULL;
2714                 }
2715         return(ret);
2716         }
2717
2718 void ssl_clear_cipher_ctx(SSL *s)
2719         {
2720         if (s->enc_read_ctx != NULL)
2721                 {
2722                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2723                 OPENSSL_free(s->enc_read_ctx);
2724                 s->enc_read_ctx=NULL;
2725                 }
2726         if (s->enc_write_ctx != NULL)
2727                 {
2728                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2729                 OPENSSL_free(s->enc_write_ctx);
2730                 s->enc_write_ctx=NULL;
2731                 }
2732 #ifndef OPENSSL_NO_COMP
2733         if (s->expand != NULL)
2734                 {
2735                 COMP_CTX_free(s->expand);
2736                 s->expand=NULL;
2737                 }
2738         if (s->compress != NULL)
2739                 {
2740                 COMP_CTX_free(s->compress);
2741                 s->compress=NULL;
2742                 }
2743 #endif
2744         }
2745
2746 /* Fix this function so that it takes an optional type parameter */
2747 X509 *SSL_get_certificate(const SSL *s)
2748         {
2749         if (s->cert != NULL)
2750                 return(s->cert->key->x509);
2751         else
2752                 return(NULL);
2753         }
2754
2755 /* Fix this function so that it takes an optional type parameter */
2756 EVP_PKEY *SSL_get_privatekey(SSL *s)
2757         {
2758         if (s->cert != NULL)
2759                 return(s->cert->key->privatekey);
2760         else
2761                 return(NULL);
2762         }
2763
2764 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2765         {
2766         if ((s->session != NULL) && (s->session->cipher != NULL))
2767                 return(s->session->cipher);
2768         return(NULL);
2769         }
2770 #ifdef OPENSSL_NO_COMP
2771 const void *SSL_get_current_compression(SSL *s)
2772         {
2773         return NULL;
2774         }
2775 const void *SSL_get_current_expansion(SSL *s)
2776         {
2777         return NULL;
2778         }
2779 #else
2780
2781 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2782         {
2783         if (s->compress != NULL)
2784                 return(s->compress->meth);
2785         return(NULL);
2786         }
2787
2788 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2789         {
2790         if (s->expand != NULL)
2791                 return(s->expand->meth);
2792         return(NULL);
2793         }
2794 #endif
2795
2796 int ssl_init_wbio_buffer(SSL *s,int push)
2797         {
2798         BIO *bbio;
2799
2800         if (s->bbio == NULL)
2801                 {
2802                 bbio=BIO_new(BIO_f_buffer());
2803                 if (bbio == NULL) return(0);
2804                 s->bbio=bbio;
2805                 }
2806         else
2807                 {
2808                 bbio=s->bbio;
2809                 if (s->bbio == s->wbio)
2810                         s->wbio=BIO_pop(s->wbio);
2811                 }
2812         (void)BIO_reset(bbio);
2813 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2814         if (!BIO_set_read_buffer_size(bbio,1))
2815                 {
2816                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2817                 return(0);
2818                 }
2819         if (push)
2820                 {
2821                 if (s->wbio != bbio)
2822                         s->wbio=BIO_push(bbio,s->wbio);
2823                 }
2824         else
2825                 {
2826                 if (s->wbio == bbio)
2827                         s->wbio=BIO_pop(bbio);
2828                 }
2829         return(1);
2830         }
2831
2832 void ssl_free_wbio_buffer(SSL *s)
2833         {
2834         if (s->bbio == NULL) return;
2835
2836         if (s->bbio == s->wbio)
2837                 {
2838                 /* remove buffering */
2839                 s->wbio=BIO_pop(s->wbio);
2840 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2841                 assert(s->wbio != NULL);
2842 #endif
2843         }
2844         BIO_free(s->bbio);
2845         s->bbio=NULL;
2846         }
2847         
2848 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2849         {
2850         ctx->quiet_shutdown=mode;
2851         }
2852
2853 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2854         {
2855         return(ctx->quiet_shutdown);
2856         }
2857
2858 void SSL_set_quiet_shutdown(SSL *s,int mode)
2859         {
2860         s->quiet_shutdown=mode;
2861         }
2862
2863 int SSL_get_quiet_shutdown(const SSL *s)
2864         {
2865         return(s->quiet_shutdown);
2866         }
2867
2868 void SSL_set_shutdown(SSL *s,int mode)
2869         {
2870         s->shutdown=mode;
2871         }
2872
2873 int SSL_get_shutdown(const SSL *s)
2874         {
2875         return(s->shutdown);
2876         }
2877
2878 int SSL_version(const SSL *s)
2879         {
2880         return(s->version);
2881         }
2882
2883 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2884         {
2885         return(ssl->ctx);
2886         }
2887
2888 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2889         {
2890         if (ssl->ctx == ctx)
2891                 return ssl->ctx;
2892 #ifndef OPENSSL_NO_TLSEXT
2893         if (ctx == NULL)
2894                 ctx = ssl->initial_ctx;
2895 #endif
2896         if (ssl->cert != NULL)
2897                 ssl_cert_free(ssl->cert);
2898         ssl->cert = ssl_cert_dup(ctx->cert);
2899         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2900         if (ssl->ctx != NULL)
2901                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2902         ssl->ctx = ctx;
2903         return(ssl->ctx);
2904         }
2905
2906 #ifndef OPENSSL_NO_STDIO
2907 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2908         {
2909         return(X509_STORE_set_default_paths(ctx->cert_store));
2910         }
2911
2912 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2913                 const char *CApath)
2914         {
2915         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2916         }
2917 #endif
2918
2919 void SSL_set_info_callback(SSL *ssl,
2920         void (*cb)(const SSL *ssl,int type,int val))
2921         {
2922         ssl->info_callback=cb;
2923         }
2924
2925 /* One compiler (Diab DCC) doesn't like argument names in returned
2926    function pointer.  */
2927 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2928         {
2929         return ssl->info_callback;
2930         }
2931
2932 int SSL_state(const SSL *ssl)
2933         {
2934         return(ssl->state);
2935         }
2936
2937 void SSL_set_verify_result(SSL *ssl,long arg)
2938         {
2939         ssl->verify_result=arg;
2940         }
2941
2942 long SSL_get_verify_result(const SSL *ssl)
2943         {
2944         return(ssl->verify_result);
2945         }
2946
2947 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2948                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2949         {
2950         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2951                                 new_func, dup_func, free_func);
2952         }
2953
2954 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2955         {
2956         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2957         }
2958
2959 void *SSL_get_ex_data(const SSL *s,int idx)
2960         {
2961         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2962         }
2963
2964 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2965                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2966         {
2967         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2968                                 new_func, dup_func, free_func);
2969         }
2970
2971 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2972         {
2973         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2974         }
2975
2976 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2977         {
2978         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2979         }
2980
2981 int ssl_ok(SSL *s)
2982         {
2983         return(1);
2984         }
2985
2986 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2987         {
2988         return(ctx->cert_store);
2989         }
2990
2991 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2992         {
2993         if (ctx->cert_store != NULL)
2994                 X509_STORE_free(ctx->cert_store);
2995         ctx->cert_store=store;
2996         }
2997
2998 int SSL_want(const SSL *s)
2999         {
3000         return(s->rwstate);
3001         }
3002
3003 /*!
3004  * \brief Set the callback for generating temporary RSA keys.
3005  * \param ctx the SSL context.
3006  * \param cb the callback
3007  */
3008
3009 #ifndef OPENSSL_NO_RSA
3010 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3011                                                           int is_export,
3012                                                           int keylength))
3013     {
3014     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3015     }
3016
3017 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3018                                                   int is_export,
3019                                                   int keylength))
3020     {
3021     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3022     }
3023 #endif
3024
3025 #ifdef DOXYGEN
3026 /*!
3027  * \brief The RSA temporary key callback function.
3028  * \param ssl the SSL session.
3029  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3030  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3031  * of the required key in bits.
3032  * \return the temporary RSA key.
3033  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3034  */
3035
3036 RSA *cb(SSL *ssl,int is_export,int keylength)
3037     {}
3038 #endif
3039
3040 /*!
3041  * \brief Set the callback for generating temporary DH keys.
3042  * \param ctx the SSL context.
3043  * \param dh the callback
3044  */
3045
3046 #ifndef OPENSSL_NO_DH
3047 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3048                                                         int keylength))
3049         {
3050         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3051         }
3052
3053 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3054                                                 int keylength))
3055         {
3056         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3057         }
3058 #endif
3059
3060 #ifndef OPENSSL_NO_ECDH
3061 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3062                                                                 int keylength))
3063         {
3064         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3065         }
3066
3067 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3068                                                         int keylength))
3069         {
3070         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3071         }
3072 #endif
3073
3074 #ifndef OPENSSL_NO_PSK
3075 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3076         {
3077         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3078                 {
3079                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3080                 return 0;
3081                 }
3082         if (ctx->psk_identity_hint != NULL)
3083                 OPENSSL_free(ctx->psk_identity_hint);
3084         if (identity_hint != NULL)
3085                 {
3086                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3087                 if (ctx->psk_identity_hint == NULL)
3088                         return 0;
3089                 }
3090         else
3091                 ctx->psk_identity_hint = NULL;
3092         return 1;
3093         }
3094
3095 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3096         {
3097         if (s == NULL)
3098                 return 0;
3099
3100         if (s->session == NULL)
3101                 return 1; /* session not created yet, ignored */
3102
3103         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3104                 {
3105                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3106                 return 0;
3107                 }
3108         if (s->session->psk_identity_hint != NULL)
3109                 OPENSSL_free(s->session->psk_identity_hint);
3110         if (identity_hint != NULL)
3111                 {
3112                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3113                 if (s->session->psk_identity_hint == NULL)
3114                         return 0;
3115                 }
3116         else
3117                 s->session->psk_identity_hint = NULL;
3118         return 1;
3119         }
3120
3121 const char *SSL_get_psk_identity_hint(const SSL *s)
3122         {
3123         if (s == NULL || s->session == NULL)
3124                 return NULL;
3125         return(s->session->psk_identity_hint);
3126         }
3127
3128 const char *SSL_get_psk_identity(const SSL *s)
3129         {
3130         if (s == NULL || s->session == NULL)
3131                 return NULL;
3132         return(s->session->psk_identity);
3133         }
3134
3135 void SSL_set_psk_client_callback(SSL *s,
3136     unsigned int (*cb)(SSL *ssl, const char *hint,
3137                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3138                        unsigned int max_psk_len))
3139         {
3140         s->psk_client_callback = cb;
3141         }
3142
3143 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3144     unsigned int (*cb)(SSL *ssl, const char *hint,
3145                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3146                        unsigned int max_psk_len))
3147         {
3148         ctx->psk_client_callback = cb;
3149         }
3150
3151 void SSL_set_psk_server_callback(SSL *s,
3152     unsigned int (*cb)(SSL *ssl, const char *identity,
3153                        unsigned char *psk, unsigned int max_psk_len))
3154         {
3155         s->psk_server_callback = cb;
3156         }
3157
3158 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3159     unsigned int (*cb)(SSL *ssl, const char *identity,
3160                        unsigned char *psk, unsigned int max_psk_len))
3161         {
3162         ctx->psk_server_callback = cb;
3163         }
3164 #endif
3165
3166 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))
3167         {
3168         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3169         }
3170 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))
3171         {
3172         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3173         }
3174
3175 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3176         int (*cb)(SSL *ssl, int is_forward_secure))
3177         {
3178         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3179                 (void (*)(void))cb);
3180         }
3181 void SSL_set_not_resumable_session_callback(SSL *ssl,
3182         int (*cb)(SSL *ssl, int is_forward_secure))
3183         {
3184         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3185                 (void (*)(void))cb);
3186         }
3187
3188 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3189  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3190  * any. If EVP_MD pointer is passed, initializes ctx with this md
3191  * Returns newly allocated ctx;
3192  */
3193
3194 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
3195 {
3196         ssl_clear_hash_ctx(hash);
3197         *hash = EVP_MD_CTX_create();
3198         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3199         return *hash;
3200 }
3201 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
3202 {
3203
3204         if (*hash) EVP_MD_CTX_destroy(*hash);
3205         *hash=NULL;
3206 }
3207
3208 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3209 #include "../crypto/bio/bss_file.c"
3210 #endif
3211
3212 IMPLEMENT_STACK_OF(SSL_CIPHER)
3213 IMPLEMENT_STACK_OF(SSL_COMP)
3214 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3215                                     ssl_cipher_id);
3216