tap: Define TAP_MANUALMAKE; unbreak building
[dragonfly.git] / crypto / openssl / ssl / ssl_lib.c
1 /*! \file ssl/ssl_lib.c
2  *  \brief Version independent SSL functions.
3  */
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5  * All rights reserved.
6  *
7  * This package is an SSL implementation written
8  * by Eric Young (eay@cryptsoft.com).
9  * The implementation was written so as to conform with Netscapes SSL.
10  * 
11  * This library is free for commercial and non-commercial use as long as
12  * the following conditions are aheared to.  The following conditions
13  * apply to all code found in this distribution, be it the RC4, RSA,
14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
15  * included with this distribution is covered by the same copyright terms
16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
17  * 
18  * Copyright remains Eric Young's, and as such any Copyright notices in
19  * the code are not to be removed.
20  * If this package is used in a product, Eric Young should be given attribution
21  * as the author of the parts of the library used.
22  * This can be in the form of a textual message at program startup or
23  * in documentation (online or textual) provided with the package.
24  * 
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
28  * 1. Redistributions of source code must retain the copyright
29  *    notice, this list of conditions and the following disclaimer.
30  * 2. Redistributions in binary form must reproduce the above copyright
31  *    notice, this list of conditions and the following disclaimer in the
32  *    documentation and/or other materials provided with the distribution.
33  * 3. All advertising materials mentioning features or use of this software
34  *    must display the following acknowledgement:
35  *    "This product includes cryptographic software written by
36  *     Eric Young (eay@cryptsoft.com)"
37  *    The word 'cryptographic' can be left out if the rouines from the library
38  *    being used are not cryptographic related :-).
39  * 4. If you include any Windows specific code (or a derivative thereof) from 
40  *    the apps directory (application code) you must include an acknowledgement:
41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
42  * 
43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53  * SUCH DAMAGE.
54  * 
55  * The licence and distribution terms for any publically available version or
56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
57  * copied and put under another distribution licence
58  * [including the GNU Public Licence.]
59  */
60 /* ====================================================================
61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
62  *
63  * Redistribution and use in source and binary forms, with or without
64  * modification, are permitted provided that the following conditions
65  * are met:
66  *
67  * 1. Redistributions of source code must retain the above copyright
68  *    notice, this list of conditions and the following disclaimer. 
69  *
70  * 2. Redistributions in binary form must reproduce the above copyright
71  *    notice, this list of conditions and the following disclaimer in
72  *    the documentation and/or other materials provided with the
73  *    distribution.
74  *
75  * 3. All advertising materials mentioning features or use of this
76  *    software must display the following acknowledgment:
77  *    "This product includes software developed by the OpenSSL Project
78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
79  *
80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81  *    endorse or promote products derived from this software without
82  *    prior written permission. For written permission, please contact
83  *    openssl-core@openssl.org.
84  *
85  * 5. Products derived from this software may not be called "OpenSSL"
86  *    nor may "OpenSSL" appear in their names without prior written
87  *    permission of the OpenSSL Project.
88  *
89  * 6. Redistributions of any form whatsoever must retain the following
90  *    acknowledgment:
91  *    "This product includes software developed by the OpenSSL Project
92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
93  *
94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105  * OF THE POSSIBILITY OF SUCH DAMAGE.
106  * ====================================================================
107  *
108  * This product includes cryptographic software written by Eric Young
109  * (eay@cryptsoft.com).  This product includes software written by Tim
110  * Hudson (tjh@cryptsoft.com).
111  *
112  */
113 /* ====================================================================
114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115  * ECC cipher suite support in OpenSSL originally developed by 
116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117  */
118 /* ====================================================================
119  * Copyright 2005 Nokia. All rights reserved.
120  *
121  * The portions of the attached software ("Contribution") is developed by
122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
123  * license.
124  *
125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
127  * support (see RFC 4279) to OpenSSL.
128  *
129  * No patent licenses or other rights except those expressly stated in
130  * the OpenSSL open source license shall be deemed granted or received
131  * expressly, by implication, estoppel, or otherwise.
132  *
133  * No assurances are provided by Nokia that the Contribution does not
134  * infringe the patent or other intellectual property rights of any third
135  * party or that the license provides you with all the necessary rights
136  * to make use of the Contribution.
137  *
138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
142  * OTHERWISE.
143  */
144
145 #ifdef REF_CHECK
146 #  include <assert.h>
147 #endif
148 #include <stdio.h>
149 #include "ssl_locl.h"
150 #include "kssl_lcl.h"
151 #include <openssl/objects.h>
152 #include <openssl/lhash.h>
153 #include <openssl/x509v3.h>
154 #include <openssl/rand.h>
155 #include <openssl/ocsp.h>
156 #ifndef OPENSSL_NO_DH
157 #include <openssl/dh.h>
158 #endif
159 #ifndef OPENSSL_NO_ENGINE
160 #include <openssl/engine.h>
161 #endif
162
163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
164
165 SSL3_ENC_METHOD ssl3_undef_enc_method={
166         /* evil casts, but these functions are only called if there's a library bug */
167         (int (*)(SSL *,int))ssl_undefined_function,
168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
169         ssl_undefined_function,
170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
171         (int (*)(SSL*, int))ssl_undefined_function,
172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
173         0,      /* finish_mac_length */
174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
175         NULL,   /* client_finished_label */
176         0,      /* client_finished_label_len */
177         NULL,   /* server_finished_label */
178         0,      /* server_finished_label_len */
179         (int (*)(int))ssl_undefined_function,
180         (int (*)(SSL *, unsigned char *, size_t, const char *,
181                  size_t, const unsigned char *, size_t,
182                  int use_context)) ssl_undefined_function,
183         };
184
185 int SSL_clear(SSL *s)
186         {
187
188         if (s->method == NULL)
189                 {
190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
191                 return(0);
192                 }
193
194         if (ssl_clear_bad_session(s))
195                 {
196                 SSL_SESSION_free(s->session);
197                 s->session=NULL;
198                 }
199
200         s->error=0;
201         s->hit=0;
202         s->shutdown=0;
203
204 #if 0 /* Disabled since version 1.10 of this file (early return not
205        * needed because SSL_clear is not called when doing renegotiation) */
206         /* This is set if we are doing dynamic renegotiation so keep
207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
208         if (s->renegotiate) return(1);
209 #else
210         if (s->renegotiate)
211                 {
212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
213                 return 0;
214                 }
215 #endif
216
217         s->type=0;
218
219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
220
221         s->version=s->method->version;
222         s->client_version=s->version;
223         s->rwstate=SSL_NOTHING;
224         s->rstate=SSL_ST_READ_HEADER;
225 #if 0
226         s->read_ahead=s->ctx->read_ahead;
227 #endif
228
229         if (s->init_buf != NULL)
230                 {
231                 BUF_MEM_free(s->init_buf);
232                 s->init_buf=NULL;
233                 }
234
235         ssl_clear_cipher_ctx(s);
236         ssl_clear_hash_ctx(&s->read_hash);
237         ssl_clear_hash_ctx(&s->write_hash);
238
239         s->first_packet=0;
240
241 #if 1
242         /* Check to see if we were changed into a different method, if
243          * so, revert back if we are not doing session-id reuse. */
244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
245                 {
246                 s->method->ssl_free(s);
247                 s->method=s->ctx->method;
248                 if (!s->method->ssl_new(s))
249                         return(0);
250                 }
251         else
252 #endif
253                 s->method->ssl_clear(s);
254         return(1);
255         }
256
257 /** Used to change an SSL_CTXs default SSL method type */
258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
259         {
260         STACK_OF(SSL_CIPHER) *sk;
261
262         ctx->method=meth;
263
264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
265                 &(ctx->cipher_list_by_id),
266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
268                 {
269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
270                 return(0);
271                 }
272         return(1);
273         }
274
275 SSL *SSL_new(SSL_CTX *ctx)
276         {
277         SSL *s;
278
279         if (ctx == NULL)
280                 {
281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
282                 return(NULL);
283                 }
284         if (ctx->method == NULL)
285                 {
286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
287                 return(NULL);
288                 }
289
290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
291         if (s == NULL) goto err;
292         memset(s,0,sizeof(SSL));
293
294 #ifndef OPENSSL_NO_KRB5
295         s->kssl_ctx = kssl_ctx_new();
296 #endif  /* OPENSSL_NO_KRB5 */
297
298         s->options=ctx->options;
299         s->mode=ctx->mode;
300         s->max_cert_list=ctx->max_cert_list;
301
302         if (ctx->cert != NULL)
303                 {
304                 /* Earlier library versions used to copy the pointer to
305                  * the CERT, not its contents; only when setting new
306                  * parameters for the per-SSL copy, ssl_cert_new would be
307                  * called (and the direct reference to the per-SSL_CTX
308                  * settings would be lost, but those still were indirectly
309                  * accessed for various purposes, and for that reason they
310                  * used to be known as s->ctx->default_cert).
311                  * Now we don't look at the SSL_CTX's CERT after having
312                  * duplicated it once. */
313
314                 s->cert = ssl_cert_dup(ctx->cert);
315                 if (s->cert == NULL)
316                         goto err;
317                 }
318         else
319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
320
321         s->read_ahead=ctx->read_ahead;
322         s->msg_callback=ctx->msg_callback;
323         s->msg_callback_arg=ctx->msg_callback_arg;
324         s->verify_mode=ctx->verify_mode;
325 #if 0
326         s->verify_depth=ctx->verify_depth;
327 #endif
328         s->sid_ctx_length=ctx->sid_ctx_length;
329         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
330         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
331         s->verify_callback=ctx->default_verify_callback;
332         s->generate_session_id=ctx->generate_session_id;
333
334         s->param = X509_VERIFY_PARAM_new();
335         if (!s->param)
336                 goto err;
337         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
338 #if 0
339         s->purpose = ctx->purpose;
340         s->trust = ctx->trust;
341 #endif
342         s->quiet_shutdown=ctx->quiet_shutdown;
343         s->max_send_fragment = ctx->max_send_fragment;
344
345         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
346         s->ctx=ctx;
347 #ifndef OPENSSL_NO_TLSEXT
348         s->tlsext_debug_cb = 0;
349         s->tlsext_debug_arg = NULL;
350         s->tlsext_ticket_expected = 0;
351         s->tlsext_status_type = -1;
352         s->tlsext_status_expected = 0;
353         s->tlsext_ocsp_ids = NULL;
354         s->tlsext_ocsp_exts = NULL;
355         s->tlsext_ocsp_resp = NULL;
356         s->tlsext_ocsp_resplen = -1;
357         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
358         s->initial_ctx=ctx;
359 # ifndef OPENSSL_NO_NEXTPROTONEG
360         s->next_proto_negotiated = NULL;
361 # endif
362 #endif
363
364         s->verify_result=X509_V_OK;
365
366         s->method=ctx->method;
367
368         if (!s->method->ssl_new(s))
369                 goto err;
370
371         s->references=1;
372         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
373
374         SSL_clear(s);
375
376         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
377
378 #ifndef OPENSSL_NO_PSK
379         s->psk_client_callback=ctx->psk_client_callback;
380         s->psk_server_callback=ctx->psk_server_callback;
381 #endif
382
383         return(s);
384 err:
385         if (s != NULL)
386                 {
387                 if (s->cert != NULL)
388                         ssl_cert_free(s->cert);
389                 if (s->ctx != NULL)
390                         SSL_CTX_free(s->ctx); /* decrement reference count */
391                 OPENSSL_free(s);
392                 }
393         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
394         return(NULL);
395         }
396
397 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
398                                    unsigned int sid_ctx_len)
399     {
400     if(sid_ctx_len > sizeof ctx->sid_ctx)
401         {
402         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
403         return 0;
404         }
405     ctx->sid_ctx_length=sid_ctx_len;
406     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
407
408     return 1;
409     }
410
411 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
412                                unsigned int sid_ctx_len)
413     {
414     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
415         {
416         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
417         return 0;
418         }
419     ssl->sid_ctx_length=sid_ctx_len;
420     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
421
422     return 1;
423     }
424
425 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
426         {
427         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
428         ctx->generate_session_id = cb;
429         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
430         return 1;
431         }
432
433 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
434         {
435         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
436         ssl->generate_session_id = cb;
437         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
438         return 1;
439         }
440
441 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
442                                 unsigned int id_len)
443         {
444         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
445          * we can "construct" a session to give us the desired check - ie. to
446          * find if there's a session in the hash table that would conflict with
447          * any new session built out of this id/id_len and the ssl_version in
448          * use by this SSL. */
449         SSL_SESSION r, *p;
450
451         if(id_len > sizeof r.session_id)
452                 return 0;
453
454         r.ssl_version = ssl->version;
455         r.session_id_length = id_len;
456         memcpy(r.session_id, id, id_len);
457         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
458          * callback is calling us to check the uniqueness of a shorter ID, it
459          * must be compared as a padded-out ID because that is what it will be
460          * converted to when the callback has finished choosing it. */
461         if((r.ssl_version == SSL2_VERSION) &&
462                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
463                 {
464                 memset(r.session_id + id_len, 0,
465                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
466                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
467                 }
468
469         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
470         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
471         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
472         return (p != NULL);
473         }
474
475 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
476         {
477         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
478         }
479
480 int SSL_set_purpose(SSL *s, int purpose)
481         {
482         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
483         }
484
485 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
486         {
487         return X509_VERIFY_PARAM_set_trust(s->param, trust);
488         }
489
490 int SSL_set_trust(SSL *s, int trust)
491         {
492         return X509_VERIFY_PARAM_set_trust(s->param, trust);
493         }
494
495 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
496         {
497         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
498         }
499
500 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
501         {
502         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
503         }
504
505 void SSL_free(SSL *s)
506         {
507         int i;
508
509         if(s == NULL)
510             return;
511
512         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
513 #ifdef REF_PRINT
514         REF_PRINT("SSL",s);
515 #endif
516         if (i > 0) return;
517 #ifdef REF_CHECK
518         if (i < 0)
519                 {
520                 fprintf(stderr,"SSL_free, bad reference count\n");
521                 abort(); /* ok */
522                 }
523 #endif
524
525         if (s->param)
526                 X509_VERIFY_PARAM_free(s->param);
527
528         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
529
530         if (s->bbio != NULL)
531                 {
532                 /* If the buffering BIO is in place, pop it off */
533                 if (s->bbio == s->wbio)
534                         {
535                         s->wbio=BIO_pop(s->wbio);
536                         }
537                 BIO_free(s->bbio);
538                 s->bbio=NULL;
539                 }
540         if (s->rbio != NULL)
541                 BIO_free_all(s->rbio);
542         if ((s->wbio != NULL) && (s->wbio != s->rbio))
543                 BIO_free_all(s->wbio);
544
545         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
546
547         /* add extra stuff */
548         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
549         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
550
551         /* Make the next call work :-) */
552         if (s->session != NULL)
553                 {
554                 ssl_clear_bad_session(s);
555                 SSL_SESSION_free(s->session);
556                 }
557
558         ssl_clear_cipher_ctx(s);
559         ssl_clear_hash_ctx(&s->read_hash);
560         ssl_clear_hash_ctx(&s->write_hash);
561
562         if (s->cert != NULL) ssl_cert_free(s->cert);
563         /* Free up if allocated */
564
565 #ifndef OPENSSL_NO_TLSEXT
566         if (s->tlsext_hostname)
567                 OPENSSL_free(s->tlsext_hostname);
568         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
569 #ifndef OPENSSL_NO_EC
570         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
571         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
572 #endif /* OPENSSL_NO_EC */
573         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
574         if (s->tlsext_ocsp_exts)
575                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
576                                                 X509_EXTENSION_free);
577         if (s->tlsext_ocsp_ids)
578                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
579         if (s->tlsext_ocsp_resp)
580                 OPENSSL_free(s->tlsext_ocsp_resp);
581 #endif
582
583         if (s->client_CA != NULL)
584                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
585
586         if (s->method != NULL) s->method->ssl_free(s);
587
588         if (s->ctx) SSL_CTX_free(s->ctx);
589
590 #ifndef OPENSSL_NO_KRB5
591         if (s->kssl_ctx != NULL)
592                 kssl_ctx_free(s->kssl_ctx);
593 #endif  /* OPENSSL_NO_KRB5 */
594
595 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
596         if (s->next_proto_negotiated)
597                 OPENSSL_free(s->next_proto_negotiated);
598 #endif
599
600         if (s->srtp_profiles)
601             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
602
603         OPENSSL_free(s);
604         }
605
606 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
607         {
608         /* If the output buffering BIO is still in place, remove it
609          */
610         if (s->bbio != NULL)
611                 {
612                 if (s->wbio == s->bbio)
613                         {
614                         s->wbio=s->wbio->next_bio;
615                         s->bbio->next_bio=NULL;
616                         }
617                 }
618         if ((s->rbio != NULL) && (s->rbio != rbio))
619                 BIO_free_all(s->rbio);
620         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
621                 BIO_free_all(s->wbio);
622         s->rbio=rbio;
623         s->wbio=wbio;
624         }
625
626 BIO *SSL_get_rbio(const SSL *s)
627         { return(s->rbio); }
628
629 BIO *SSL_get_wbio(const SSL *s)
630         { return(s->wbio); }
631
632 int SSL_get_fd(const SSL *s)
633         {
634         return(SSL_get_rfd(s));
635         }
636
637 int SSL_get_rfd(const SSL *s)
638         {
639         int ret= -1;
640         BIO *b,*r;
641
642         b=SSL_get_rbio(s);
643         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
644         if (r != NULL)
645                 BIO_get_fd(r,&ret);
646         return(ret);
647         }
648
649 int SSL_get_wfd(const SSL *s)
650         {
651         int ret= -1;
652         BIO *b,*r;
653
654         b=SSL_get_wbio(s);
655         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
656         if (r != NULL)
657                 BIO_get_fd(r,&ret);
658         return(ret);
659         }
660
661 #ifndef OPENSSL_NO_SOCK
662 int SSL_set_fd(SSL *s,int fd)
663         {
664         int ret=0;
665         BIO *bio=NULL;
666
667         bio=BIO_new(BIO_s_socket());
668
669         if (bio == NULL)
670                 {
671                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
672                 goto err;
673                 }
674         BIO_set_fd(bio,fd,BIO_NOCLOSE);
675         SSL_set_bio(s,bio,bio);
676         ret=1;
677 err:
678         return(ret);
679         }
680
681 int SSL_set_wfd(SSL *s,int fd)
682         {
683         int ret=0;
684         BIO *bio=NULL;
685
686         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
687                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
688                 {
689                 bio=BIO_new(BIO_s_socket());
690
691                 if (bio == NULL)
692                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
693                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
694                 SSL_set_bio(s,SSL_get_rbio(s),bio);
695                 }
696         else
697                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
698         ret=1;
699 err:
700         return(ret);
701         }
702
703 int SSL_set_rfd(SSL *s,int fd)
704         {
705         int ret=0;
706         BIO *bio=NULL;
707
708         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
709                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
710                 {
711                 bio=BIO_new(BIO_s_socket());
712
713                 if (bio == NULL)
714                         {
715                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
716                         goto err;
717                         }
718                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
719                 SSL_set_bio(s,bio,SSL_get_wbio(s));
720                 }
721         else
722                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
723         ret=1;
724 err:
725         return(ret);
726         }
727 #endif
728
729
730 /* return length of latest Finished message we sent, copy to 'buf' */
731 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
732         {
733         size_t ret = 0;
734         
735         if (s->s3 != NULL)
736                 {
737                 ret = s->s3->tmp.finish_md_len;
738                 if (count > ret)
739                         count = ret;
740                 memcpy(buf, s->s3->tmp.finish_md, count);
741                 }
742         return ret;
743         }
744
745 /* return length of latest Finished message we expected, copy to 'buf' */
746 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
747         {
748         size_t ret = 0;
749         
750         if (s->s3 != NULL)
751                 {
752                 ret = s->s3->tmp.peer_finish_md_len;
753                 if (count > ret)
754                         count = ret;
755                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
756                 }
757         return ret;
758         }
759
760
761 int SSL_get_verify_mode(const SSL *s)
762         {
763         return(s->verify_mode);
764         }
765
766 int SSL_get_verify_depth(const SSL *s)
767         {
768         return X509_VERIFY_PARAM_get_depth(s->param);
769         }
770
771 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
772         {
773         return(s->verify_callback);
774         }
775
776 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
777         {
778         return(ctx->verify_mode);
779         }
780
781 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
782         {
783         return X509_VERIFY_PARAM_get_depth(ctx->param);
784         }
785
786 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
787         {
788         return(ctx->default_verify_callback);
789         }
790
791 void SSL_set_verify(SSL *s,int mode,
792                     int (*callback)(int ok,X509_STORE_CTX *ctx))
793         {
794         s->verify_mode=mode;
795         if (callback != NULL)
796                 s->verify_callback=callback;
797         }
798
799 void SSL_set_verify_depth(SSL *s,int depth)
800         {
801         X509_VERIFY_PARAM_set_depth(s->param, depth);
802         }
803
804 void SSL_set_read_ahead(SSL *s,int yes)
805         {
806         s->read_ahead=yes;
807         }
808
809 int SSL_get_read_ahead(const SSL *s)
810         {
811         return(s->read_ahead);
812         }
813
814 int SSL_pending(const SSL *s)
815         {
816         /* SSL_pending cannot work properly if read-ahead is enabled
817          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
818          * and it is impossible to fix since SSL_pending cannot report
819          * errors that may be observed while scanning the new data.
820          * (Note that SSL_pending() is often used as a boolean value,
821          * so we'd better not return -1.)
822          */
823         return(s->method->ssl_pending(s));
824         }
825
826 X509 *SSL_get_peer_certificate(const SSL *s)
827         {
828         X509 *r;
829         
830         if ((s == NULL) || (s->session == NULL))
831                 r=NULL;
832         else
833                 r=s->session->peer;
834
835         if (r == NULL) return(r);
836
837         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
838
839         return(r);
840         }
841
842 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
843         {
844         STACK_OF(X509) *r;
845         
846         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
847                 r=NULL;
848         else
849                 r=s->session->sess_cert->cert_chain;
850
851         /* If we are a client, cert_chain includes the peer's own
852          * certificate; if we are a server, it does not. */
853         
854         return(r);
855         }
856
857 /* Now in theory, since the calling process own 't' it should be safe to
858  * modify.  We need to be able to read f without being hassled */
859 void SSL_copy_session_id(SSL *t,const SSL *f)
860         {
861         CERT *tmp;
862
863         /* Do we need to to SSL locking? */
864         SSL_set_session(t,SSL_get_session(f));
865
866         /* what if we are setup as SSLv2 but want to talk SSLv3 or
867          * vice-versa */
868         if (t->method != f->method)
869                 {
870                 t->method->ssl_free(t); /* cleanup current */
871                 t->method=f->method;    /* change method */
872                 t->method->ssl_new(t);  /* setup new */
873                 }
874
875         tmp=t->cert;
876         if (f->cert != NULL)
877                 {
878                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
879                 t->cert=f->cert;
880                 }
881         else
882                 t->cert=NULL;
883         if (tmp != NULL) ssl_cert_free(tmp);
884         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
885         }
886
887 /* Fix this so it checks all the valid key/cert options */
888 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
889         {
890         if (    (ctx == NULL) ||
891                 (ctx->cert == NULL) ||
892                 (ctx->cert->key->x509 == NULL))
893                 {
894                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
895                 return(0);
896                 }
897         if      (ctx->cert->key->privatekey == NULL)
898                 {
899                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
900                 return(0);
901                 }
902         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
903         }
904
905 /* Fix this function so that it takes an optional type parameter */
906 int SSL_check_private_key(const SSL *ssl)
907         {
908         if (ssl == NULL)
909                 {
910                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
911                 return(0);
912                 }
913         if (ssl->cert == NULL)
914                 {
915                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
916                 return 0;
917                 }
918         if (ssl->cert->key->x509 == NULL)
919                 {
920                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
921                 return(0);
922                 }
923         if (ssl->cert->key->privatekey == NULL)
924                 {
925                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
926                 return(0);
927                 }
928         return(X509_check_private_key(ssl->cert->key->x509,
929                 ssl->cert->key->privatekey));
930         }
931
932 int SSL_accept(SSL *s)
933         {
934         if (s->handshake_func == 0)
935                 /* Not properly initialized yet */
936                 SSL_set_accept_state(s);
937
938         return(s->method->ssl_accept(s));
939         }
940
941 int SSL_connect(SSL *s)
942         {
943         if (s->handshake_func == 0)
944                 /* Not properly initialized yet */
945                 SSL_set_connect_state(s);
946
947         return(s->method->ssl_connect(s));
948         }
949
950 long SSL_get_default_timeout(const SSL *s)
951         {
952         return(s->method->get_timeout());
953         }
954
955 int SSL_read(SSL *s,void *buf,int num)
956         {
957         if (s->handshake_func == 0)
958                 {
959                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
960                 return -1;
961                 }
962
963         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
964                 {
965                 s->rwstate=SSL_NOTHING;
966                 return(0);
967                 }
968         return(s->method->ssl_read(s,buf,num));
969         }
970
971 int SSL_peek(SSL *s,void *buf,int num)
972         {
973         if (s->handshake_func == 0)
974                 {
975                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
976                 return -1;
977                 }
978
979         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
980                 {
981                 return(0);
982                 }
983         return(s->method->ssl_peek(s,buf,num));
984         }
985
986 int SSL_write(SSL *s,const void *buf,int num)
987         {
988         if (s->handshake_func == 0)
989                 {
990                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
991                 return -1;
992                 }
993
994         if (s->shutdown & SSL_SENT_SHUTDOWN)
995                 {
996                 s->rwstate=SSL_NOTHING;
997                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
998                 return(-1);
999                 }
1000         return(s->method->ssl_write(s,buf,num));
1001         }
1002
1003 int SSL_shutdown(SSL *s)
1004         {
1005         /* Note that this function behaves differently from what one might
1006          * expect.  Return values are 0 for no success (yet),
1007          * 1 for success; but calling it once is usually not enough,
1008          * even if blocking I/O is used (see ssl3_shutdown).
1009          */
1010
1011         if (s->handshake_func == 0)
1012                 {
1013                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1014                 return -1;
1015                 }
1016
1017         if ((s != NULL) && !SSL_in_init(s))
1018                 return(s->method->ssl_shutdown(s));
1019         else
1020                 return(1);
1021         }
1022
1023 int SSL_renegotiate(SSL *s)
1024         {
1025         if (s->renegotiate == 0)
1026                 s->renegotiate=1;
1027
1028         s->new_session=1;
1029
1030         return(s->method->ssl_renegotiate(s));
1031         }
1032
1033 int SSL_renegotiate_abbreviated(SSL *s)
1034         {
1035         if (s->renegotiate == 0)
1036                 s->renegotiate=1;
1037
1038         s->new_session=0;
1039
1040         return(s->method->ssl_renegotiate(s));
1041         }
1042
1043 int SSL_renegotiate_pending(SSL *s)
1044         {
1045         /* becomes true when negotiation is requested;
1046          * false again once a handshake has finished */
1047         return (s->renegotiate != 0);
1048         }
1049
1050 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1051         {
1052         long l;
1053
1054         switch (cmd)
1055                 {
1056         case SSL_CTRL_GET_READ_AHEAD:
1057                 return(s->read_ahead);
1058         case SSL_CTRL_SET_READ_AHEAD:
1059                 l=s->read_ahead;
1060                 s->read_ahead=larg;
1061                 return(l);
1062
1063         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1064                 s->msg_callback_arg = parg;
1065                 return 1;
1066
1067         case SSL_CTRL_OPTIONS:
1068                 return(s->options|=larg);
1069         case SSL_CTRL_CLEAR_OPTIONS:
1070                 return(s->options&=~larg);
1071         case SSL_CTRL_MODE:
1072                 return(s->mode|=larg);
1073         case SSL_CTRL_CLEAR_MODE:
1074                 return(s->mode &=~larg);
1075         case SSL_CTRL_GET_MAX_CERT_LIST:
1076                 return(s->max_cert_list);
1077         case SSL_CTRL_SET_MAX_CERT_LIST:
1078                 l=s->max_cert_list;
1079                 s->max_cert_list=larg;
1080                 return(l);
1081         case SSL_CTRL_SET_MTU:
1082 #ifndef OPENSSL_NO_DTLS1
1083                 if (larg < (long)dtls1_min_mtu())
1084                         return 0;
1085 #endif
1086
1087                 if (SSL_version(s) == DTLS1_VERSION ||
1088                     SSL_version(s) == DTLS1_BAD_VER)
1089                         {
1090                         s->d1->mtu = larg;
1091                         return larg;
1092                         }
1093                 return 0;
1094         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1095                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1096                         return 0;
1097                 s->max_send_fragment = larg;
1098                 return 1;
1099         case SSL_CTRL_GET_RI_SUPPORT:
1100                 if (s->s3)
1101                         return s->s3->send_connection_binding;
1102                 else return 0;
1103         default:
1104                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1105                 }
1106         }
1107
1108 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1109         {
1110         switch(cmd)
1111                 {
1112         case SSL_CTRL_SET_MSG_CALLBACK:
1113                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1114                 return 1;
1115                 
1116         default:
1117                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1118                 }
1119         }
1120
1121 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1122         {
1123         return ctx->sessions;
1124         }
1125
1126 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1127         {
1128         long l;
1129
1130         switch (cmd)
1131                 {
1132         case SSL_CTRL_GET_READ_AHEAD:
1133                 return(ctx->read_ahead);
1134         case SSL_CTRL_SET_READ_AHEAD:
1135                 l=ctx->read_ahead;
1136                 ctx->read_ahead=larg;
1137                 return(l);
1138                 
1139         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1140                 ctx->msg_callback_arg = parg;
1141                 return 1;
1142
1143         case SSL_CTRL_GET_MAX_CERT_LIST:
1144                 return(ctx->max_cert_list);
1145         case SSL_CTRL_SET_MAX_CERT_LIST:
1146                 l=ctx->max_cert_list;
1147                 ctx->max_cert_list=larg;
1148                 return(l);
1149
1150         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1151                 l=ctx->session_cache_size;
1152                 ctx->session_cache_size=larg;
1153                 return(l);
1154         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1155                 return(ctx->session_cache_size);
1156         case SSL_CTRL_SET_SESS_CACHE_MODE:
1157                 l=ctx->session_cache_mode;
1158                 ctx->session_cache_mode=larg;
1159                 return(l);
1160         case SSL_CTRL_GET_SESS_CACHE_MODE:
1161                 return(ctx->session_cache_mode);
1162
1163         case SSL_CTRL_SESS_NUMBER:
1164                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1165         case SSL_CTRL_SESS_CONNECT:
1166                 return(ctx->stats.sess_connect);
1167         case SSL_CTRL_SESS_CONNECT_GOOD:
1168                 return(ctx->stats.sess_connect_good);
1169         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1170                 return(ctx->stats.sess_connect_renegotiate);
1171         case SSL_CTRL_SESS_ACCEPT:
1172                 return(ctx->stats.sess_accept);
1173         case SSL_CTRL_SESS_ACCEPT_GOOD:
1174                 return(ctx->stats.sess_accept_good);
1175         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1176                 return(ctx->stats.sess_accept_renegotiate);
1177         case SSL_CTRL_SESS_HIT:
1178                 return(ctx->stats.sess_hit);
1179         case SSL_CTRL_SESS_CB_HIT:
1180                 return(ctx->stats.sess_cb_hit);
1181         case SSL_CTRL_SESS_MISSES:
1182                 return(ctx->stats.sess_miss);
1183         case SSL_CTRL_SESS_TIMEOUTS:
1184                 return(ctx->stats.sess_timeout);
1185         case SSL_CTRL_SESS_CACHE_FULL:
1186                 return(ctx->stats.sess_cache_full);
1187         case SSL_CTRL_OPTIONS:
1188                 return(ctx->options|=larg);
1189         case SSL_CTRL_CLEAR_OPTIONS:
1190                 return(ctx->options&=~larg);
1191         case SSL_CTRL_MODE:
1192                 return(ctx->mode|=larg);
1193         case SSL_CTRL_CLEAR_MODE:
1194                 return(ctx->mode&=~larg);
1195         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1196                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1197                         return 0;
1198                 ctx->max_send_fragment = larg;
1199                 return 1;
1200         default:
1201                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1202                 }
1203         }
1204
1205 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1206         {
1207         switch(cmd)
1208                 {
1209         case SSL_CTRL_SET_MSG_CALLBACK:
1210                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1211                 return 1;
1212
1213         default:
1214                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1215                 }
1216         }
1217
1218 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1219         {
1220         long l;
1221
1222         l=a->id-b->id;
1223         if (l == 0L)
1224                 return(0);
1225         else
1226                 return((l > 0)?1:-1);
1227         }
1228
1229 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1230                         const SSL_CIPHER * const *bp)
1231         {
1232         long l;
1233
1234         l=(*ap)->id-(*bp)->id;
1235         if (l == 0L)
1236                 return(0);
1237         else
1238                 return((l > 0)?1:-1);
1239         }
1240
1241 /** return a STACK of the ciphers available for the SSL and in order of
1242  * preference */
1243 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1244         {
1245         if (s != NULL)
1246                 {
1247                 if (s->cipher_list != NULL)
1248                         {
1249                         return(s->cipher_list);
1250                         }
1251                 else if ((s->ctx != NULL) &&
1252                         (s->ctx->cipher_list != NULL))
1253                         {
1254                         return(s->ctx->cipher_list);
1255                         }
1256                 }
1257         return(NULL);
1258         }
1259
1260 /** return a STACK of the ciphers available for the SSL and in order of
1261  * algorithm id */
1262 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1263         {
1264         if (s != NULL)
1265                 {
1266                 if (s->cipher_list_by_id != NULL)
1267                         {
1268                         return(s->cipher_list_by_id);
1269                         }
1270                 else if ((s->ctx != NULL) &&
1271                         (s->ctx->cipher_list_by_id != NULL))
1272                         {
1273                         return(s->ctx->cipher_list_by_id);
1274                         }
1275                 }
1276         return(NULL);
1277         }
1278
1279 /** The old interface to get the same thing as SSL_get_ciphers() */
1280 const char *SSL_get_cipher_list(const SSL *s,int n)
1281         {
1282         SSL_CIPHER *c;
1283         STACK_OF(SSL_CIPHER) *sk;
1284
1285         if (s == NULL) return(NULL);
1286         sk=SSL_get_ciphers(s);
1287         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1288                 return(NULL);
1289         c=sk_SSL_CIPHER_value(sk,n);
1290         if (c == NULL) return(NULL);
1291         return(c->name);
1292         }
1293
1294 /** specify the ciphers to be used by default by the SSL_CTX */
1295 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1296         {
1297         STACK_OF(SSL_CIPHER) *sk;
1298         
1299         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1300                 &ctx->cipher_list_by_id,str);
1301         /* ssl_create_cipher_list may return an empty stack if it
1302          * was unable to find a cipher matching the given rule string
1303          * (for example if the rule string specifies a cipher which
1304          * has been disabled). This is not an error as far as
1305          * ssl_create_cipher_list is concerned, and hence
1306          * ctx->cipher_list and ctx->cipher_list_by_id has been
1307          * updated. */
1308         if (sk == NULL)
1309                 return 0;
1310         else if (sk_SSL_CIPHER_num(sk) == 0)
1311                 {
1312                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1313                 return 0;
1314                 }
1315         return 1;
1316         }
1317
1318 /** specify the ciphers to be used by the SSL */
1319 int SSL_set_cipher_list(SSL *s,const char *str)
1320         {
1321         STACK_OF(SSL_CIPHER) *sk;
1322         
1323         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1324                 &s->cipher_list_by_id,str);
1325         /* see comment in SSL_CTX_set_cipher_list */
1326         if (sk == NULL)
1327                 return 0;
1328         else if (sk_SSL_CIPHER_num(sk) == 0)
1329                 {
1330                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1331                 return 0;
1332                 }
1333         return 1;
1334         }
1335
1336 /* works well for SSLv2, not so good for SSLv3 */
1337 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1338         {
1339         char *p;
1340         STACK_OF(SSL_CIPHER) *sk;
1341         SSL_CIPHER *c;
1342         int i;
1343
1344         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1345                 (len < 2))
1346                 return(NULL);
1347
1348         p=buf;
1349         sk=s->session->ciphers;
1350         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1351                 {
1352                 int n;
1353
1354                 c=sk_SSL_CIPHER_value(sk,i);
1355                 n=strlen(c->name);
1356                 if (n+1 > len)
1357                         {
1358                         if (p != buf)
1359                                 --p;
1360                         *p='\0';
1361                         return buf;
1362                         }
1363                 strcpy(p,c->name);
1364                 p+=n;
1365                 *(p++)=':';
1366                 len-=n+1;
1367                 }
1368         p[-1]='\0';
1369         return(buf);
1370         }
1371
1372 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1373                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1374         {
1375         int i,j=0;
1376         SSL_CIPHER *c;
1377         unsigned char *q;
1378 #ifndef OPENSSL_NO_KRB5
1379         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1380 #endif /* OPENSSL_NO_KRB5 */
1381
1382         if (sk == NULL) return(0);
1383         q=p;
1384
1385         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1386                 {
1387                 c=sk_SSL_CIPHER_value(sk,i);
1388                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1389                 if ((c->algorithm_ssl & SSL_TLSV1_2) && 
1390                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1391                         continue;
1392 #ifndef OPENSSL_NO_KRB5
1393                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1394                     nokrb5)
1395                     continue;
1396 #endif /* OPENSSL_NO_KRB5 */
1397 #ifndef OPENSSL_NO_PSK
1398                 /* with PSK there must be client callback set */
1399                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1400                     s->psk_client_callback == NULL)
1401                         continue;
1402 #endif /* OPENSSL_NO_PSK */
1403                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1404                 p+=j;
1405                 }
1406         /* If p == q, no ciphers and caller indicates an error. Otherwise
1407          * add SCSV if not renegotiating.
1408          */
1409         if (p != q && !s->renegotiate)
1410                 {
1411                 static SSL_CIPHER scsv =
1412                         {
1413                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1414                         };
1415                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1416                 p+=j;
1417 #ifdef OPENSSL_RI_DEBUG
1418                 fprintf(stderr, "SCSV sent by client\n");
1419 #endif
1420                 }
1421
1422         return(p-q);
1423         }
1424
1425 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1426                                                STACK_OF(SSL_CIPHER) **skp)
1427         {
1428         const SSL_CIPHER *c;
1429         STACK_OF(SSL_CIPHER) *sk;
1430         int i,n;
1431         if (s->s3)
1432                 s->s3->send_connection_binding = 0;
1433
1434         n=ssl_put_cipher_by_char(s,NULL,NULL);
1435         if ((num%n) != 0)
1436                 {
1437                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1438                 return(NULL);
1439                 }
1440         if ((skp == NULL) || (*skp == NULL))
1441                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1442         else
1443                 {
1444                 sk= *skp;
1445                 sk_SSL_CIPHER_zero(sk);
1446                 }
1447
1448         for (i=0; i<num; i+=n)
1449                 {
1450                 /* Check for SCSV */
1451                 if (s->s3 && (n != 3 || !p[0]) &&
1452                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1453                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1454                         {
1455                         /* SCSV fatal if renegotiating */
1456                         if (s->renegotiate)
1457                                 {
1458                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1459                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
1460                                 goto err;
1461                                 }
1462                         s->s3->send_connection_binding = 1;
1463                         p += n;
1464 #ifdef OPENSSL_RI_DEBUG
1465                         fprintf(stderr, "SCSV received by server\n");
1466 #endif
1467                         continue;
1468                         }
1469
1470                 c=ssl_get_cipher_by_char(s,p);
1471                 p+=n;
1472                 if (c != NULL)
1473                         {
1474                         if (!sk_SSL_CIPHER_push(sk,c))
1475                                 {
1476                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1477                                 goto err;
1478                                 }
1479                         }
1480                 }
1481
1482         if (skp != NULL)
1483                 *skp=sk;
1484         return(sk);
1485 err:
1486         if ((skp == NULL) || (*skp == NULL))
1487                 sk_SSL_CIPHER_free(sk);
1488         return(NULL);
1489         }
1490
1491
1492 #ifndef OPENSSL_NO_TLSEXT
1493 /** return a servername extension value if provided in Client Hello, or NULL.
1494  * So far, only host_name types are defined (RFC 3546).
1495  */
1496
1497 const char *SSL_get_servername(const SSL *s, const int type)
1498         {
1499         if (type != TLSEXT_NAMETYPE_host_name)
1500                 return NULL;
1501
1502         return s->session && !s->tlsext_hostname ?
1503                 s->session->tlsext_hostname :
1504                 s->tlsext_hostname;
1505         }
1506
1507 int SSL_get_servername_type(const SSL *s)
1508         {
1509         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1510                 return TLSEXT_NAMETYPE_host_name;
1511         return -1;
1512         }
1513
1514 # ifndef OPENSSL_NO_NEXTPROTONEG
1515 /* SSL_select_next_proto implements the standard protocol selection. It is
1516  * expected that this function is called from the callback set by
1517  * SSL_CTX_set_next_proto_select_cb.
1518  *
1519  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1520  * strings. The length byte itself is not included in the length. A byte
1521  * string of length 0 is invalid. No byte string may be truncated.
1522  *
1523  * The current, but experimental algorithm for selecting the protocol is:
1524  *
1525  * 1) If the server doesn't support NPN then this is indicated to the
1526  * callback. In this case, the client application has to abort the connection
1527  * or have a default application level protocol.
1528  *
1529  * 2) If the server supports NPN, but advertises an empty list then the
1530  * client selects the first protcol in its list, but indicates via the
1531  * API that this fallback case was enacted.
1532  *
1533  * 3) Otherwise, the client finds the first protocol in the server's list
1534  * that it supports and selects this protocol. This is because it's
1535  * assumed that the server has better information about which protocol
1536  * a client should use.
1537  *
1538  * 4) If the client doesn't support any of the server's advertised
1539  * protocols, then this is treated the same as case 2.
1540  *
1541  * It returns either
1542  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1543  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1544  */
1545 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)
1546         {
1547         unsigned int i, j;
1548         const unsigned char *result;
1549         int status = OPENSSL_NPN_UNSUPPORTED;
1550
1551         /* For each protocol in server preference order, see if we support it. */
1552         for (i = 0; i < server_len; )
1553                 {
1554                 for (j = 0; j < client_len; )
1555                         {
1556                         if (server[i] == client[j] &&
1557                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1558                                 {
1559                                 /* We found a match */
1560                                 result = &server[i];
1561                                 status = OPENSSL_NPN_NEGOTIATED;
1562                                 goto found;
1563                                 }
1564                         j += client[j];
1565                         j++;
1566                         }
1567                 i += server[i];
1568                 i++;
1569                 }
1570
1571         /* There's no overlap between our protocols and the server's list. */
1572         result = client;
1573         status = OPENSSL_NPN_NO_OVERLAP;
1574
1575         found:
1576         *out = (unsigned char *) result + 1;
1577         *outlen = result[0];
1578         return status;
1579         }
1580
1581 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1582  * requested protocol for this connection and returns 0. If the client didn't
1583  * request any protocol, then *data is set to NULL.
1584  *
1585  * Note that the client can request any protocol it chooses. The value returned
1586  * from this function need not be a member of the list of supported protocols
1587  * provided by the callback.
1588  */
1589 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1590         {
1591         *data = s->next_proto_negotiated;
1592         if (!*data) {
1593                 *len = 0;
1594         } else {
1595                 *len = s->next_proto_negotiated_len;
1596         }
1597 }
1598
1599 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1600  * TLS server needs a list of supported protocols for Next Protocol
1601  * Negotiation. The returned list must be in wire format.  The list is returned
1602  * by setting |out| to point to it and |outlen| to its length. This memory will
1603  * not be modified, but one should assume that the SSL* keeps a reference to
1604  * it.
1605  *
1606  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1607  * such extension will be included in the ServerHello. */
1608 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)
1609         {
1610         ctx->next_protos_advertised_cb = cb;
1611         ctx->next_protos_advertised_cb_arg = arg;
1612         }
1613
1614 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1615  * client needs to select a protocol from the server's provided list. |out|
1616  * must be set to point to the selected protocol (which may be within |in|).
1617  * The length of the protocol name must be written into |outlen|. The server's
1618  * advertised protocols are provided in |in| and |inlen|. The callback can
1619  * assume that |in| is syntactically valid.
1620  *
1621  * The client must select a protocol. It is fatal to the connection if this
1622  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1623  */
1624 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)
1625         {
1626         ctx->next_proto_select_cb = cb;
1627         ctx->next_proto_select_cb_arg = arg;
1628         }
1629 # endif
1630 #endif
1631
1632 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1633         const char *label, size_t llen, const unsigned char *p, size_t plen,
1634         int use_context)
1635         {
1636         if (s->version < TLS1_VERSION)
1637                 return -1;
1638
1639         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1640                                                            llen, p, plen,
1641                                                            use_context);
1642         }
1643
1644 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1645         {
1646         unsigned long l;
1647
1648         l=(unsigned long)
1649                 ((unsigned int) a->session_id[0]     )|
1650                 ((unsigned int) a->session_id[1]<< 8L)|
1651                 ((unsigned long)a->session_id[2]<<16L)|
1652                 ((unsigned long)a->session_id[3]<<24L);
1653         return(l);
1654         }
1655
1656 /* NB: If this function (or indeed the hash function which uses a sort of
1657  * coarser function than this one) is changed, ensure
1658  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1659  * able to construct an SSL_SESSION that will collide with any existing session
1660  * with a matching session ID. */
1661 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1662         {
1663         if (a->ssl_version != b->ssl_version)
1664                 return(1);
1665         if (a->session_id_length != b->session_id_length)
1666                 return(1);
1667         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1668         }
1669
1670 /* These wrapper functions should remain rather than redeclaring
1671  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1672  * variable. The reason is that the functions aren't static, they're exposed via
1673  * ssl.h. */
1674 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1675 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1676
1677 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1678         {
1679         SSL_CTX *ret=NULL;
1680
1681         if (meth == NULL)
1682                 {
1683                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1684                 return(NULL);
1685                 }
1686
1687 #ifdef OPENSSL_FIPS
1688         if (FIPS_mode() && (meth->version < TLS1_VERSION))      
1689                 {
1690                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1691                 return NULL;
1692                 }
1693 #endif
1694
1695         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1696                 {
1697                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1698                 goto err;
1699                 }
1700         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1701         if (ret == NULL)
1702                 goto err;
1703
1704         memset(ret,0,sizeof(SSL_CTX));
1705
1706         ret->method=meth;
1707
1708         ret->cert_store=NULL;
1709         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1710         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1711         ret->session_cache_head=NULL;
1712         ret->session_cache_tail=NULL;
1713
1714         /* We take the system default */
1715         ret->session_timeout=meth->get_timeout();
1716
1717         ret->new_session_cb=0;
1718         ret->remove_session_cb=0;
1719         ret->get_session_cb=0;
1720         ret->generate_session_id=0;
1721
1722         memset((char *)&ret->stats,0,sizeof(ret->stats));
1723
1724         ret->references=1;
1725         ret->quiet_shutdown=0;
1726
1727 /*      ret->cipher=NULL;*/
1728 /*      ret->s2->challenge=NULL;
1729         ret->master_key=NULL;
1730         ret->key_arg=NULL;
1731         ret->s2->conn_id=NULL; */
1732
1733         ret->info_callback=NULL;
1734
1735         ret->app_verify_callback=0;
1736         ret->app_verify_arg=NULL;
1737
1738         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1739         ret->read_ahead=0;
1740         ret->msg_callback=0;
1741         ret->msg_callback_arg=NULL;
1742         ret->verify_mode=SSL_VERIFY_NONE;
1743 #if 0
1744         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1745 #endif
1746         ret->sid_ctx_length=0;
1747         ret->default_verify_callback=NULL;
1748         if ((ret->cert=ssl_cert_new()) == NULL)
1749                 goto err;
1750
1751         ret->default_passwd_callback=0;
1752         ret->default_passwd_callback_userdata=NULL;
1753         ret->client_cert_cb=0;
1754         ret->app_gen_cookie_cb=0;
1755         ret->app_verify_cookie_cb=0;
1756
1757         ret->sessions=lh_SSL_SESSION_new();
1758         if (ret->sessions == NULL) goto err;
1759         ret->cert_store=X509_STORE_new();
1760         if (ret->cert_store == NULL) goto err;
1761
1762         ssl_create_cipher_list(ret->method,
1763                 &ret->cipher_list,&ret->cipher_list_by_id,
1764                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1765         if (ret->cipher_list == NULL
1766             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1767                 {
1768                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1769                 goto err2;
1770                 }
1771
1772         ret->param = X509_VERIFY_PARAM_new();
1773         if (!ret->param)
1774                 goto err;
1775
1776         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1777                 {
1778                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1779                 goto err2;
1780                 }
1781         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1782                 {
1783                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1784                 goto err2;
1785                 }
1786         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1787                 {
1788                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1789                 goto err2;
1790                 }
1791
1792         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1793                 goto err;
1794
1795         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1796
1797         ret->extra_certs=NULL;
1798         ret->comp_methods=SSL_COMP_get_compression_methods();
1799
1800         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1801
1802 #ifndef OPENSSL_NO_TLSEXT
1803         ret->tlsext_servername_callback = 0;
1804         ret->tlsext_servername_arg = NULL;
1805         /* Setup RFC4507 ticket keys */
1806         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1807                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1808                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1809                 ret->options |= SSL_OP_NO_TICKET;
1810
1811         ret->tlsext_status_cb = 0;
1812         ret->tlsext_status_arg = NULL;
1813
1814 # ifndef OPENSSL_NO_NEXTPROTONEG
1815         ret->next_protos_advertised_cb = 0;
1816         ret->next_proto_select_cb = 0;
1817 # endif
1818 #endif
1819 #ifndef OPENSSL_NO_PSK
1820         ret->psk_identity_hint=NULL;
1821         ret->psk_client_callback=NULL;
1822         ret->psk_server_callback=NULL;
1823 #endif
1824 #ifndef OPENSSL_NO_SRP
1825         SSL_CTX_SRP_CTX_init(ret);
1826 #endif
1827 #ifndef OPENSSL_NO_BUF_FREELISTS
1828         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1829         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1830         if (!ret->rbuf_freelist)
1831                 goto err;
1832         ret->rbuf_freelist->chunklen = 0;
1833         ret->rbuf_freelist->len = 0;
1834         ret->rbuf_freelist->head = NULL;
1835         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1836         if (!ret->wbuf_freelist)
1837                 {
1838                 OPENSSL_free(ret->rbuf_freelist);
1839                 goto err;
1840                 }
1841         ret->wbuf_freelist->chunklen = 0;
1842         ret->wbuf_freelist->len = 0;
1843         ret->wbuf_freelist->head = NULL;
1844 #endif
1845 #ifndef OPENSSL_NO_ENGINE
1846         ret->client_cert_engine = NULL;
1847 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1848 #define eng_strx(x)     #x
1849 #define eng_str(x)      eng_strx(x)
1850         /* Use specific client engine automatically... ignore errors */
1851         {
1852         ENGINE *eng;
1853         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1854         if (!eng)
1855                 {
1856                 ERR_clear_error();
1857                 ENGINE_load_builtin_engines();
1858                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1859                 }
1860         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1861                 ERR_clear_error();
1862         }
1863 #endif
1864 #endif
1865         /* Default is to connect to non-RI servers. When RI is more widely
1866          * deployed might change this.
1867          */
1868         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1869
1870         return(ret);
1871 err:
1872         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1873 err2:
1874         if (ret != NULL) SSL_CTX_free(ret);
1875         return(NULL);
1876         }
1877
1878 #if 0
1879 static void SSL_COMP_free(SSL_COMP *comp)
1880     { OPENSSL_free(comp); }
1881 #endif
1882
1883 #ifndef OPENSSL_NO_BUF_FREELISTS
1884 static void
1885 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1886         {
1887         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1888         for (ent = list->head; ent; ent = next)
1889                 {
1890                 next = ent->next;
1891                 OPENSSL_free(ent);
1892                 }
1893         OPENSSL_free(list);
1894         }
1895 #endif
1896
1897 void SSL_CTX_free(SSL_CTX *a)
1898         {
1899         int i;
1900
1901         if (a == NULL) return;
1902
1903         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1904 #ifdef REF_PRINT
1905         REF_PRINT("SSL_CTX",a);
1906 #endif
1907         if (i > 0) return;
1908 #ifdef REF_CHECK
1909         if (i < 0)
1910                 {
1911                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1912                 abort(); /* ok */
1913                 }
1914 #endif
1915
1916         if (a->param)
1917                 X509_VERIFY_PARAM_free(a->param);
1918
1919         /*
1920          * Free internal session cache. However: the remove_cb() may reference
1921          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1922          * after the sessions were flushed.
1923          * As the ex_data handling routines might also touch the session cache,
1924          * the most secure solution seems to be: empty (flush) the cache, then
1925          * free ex_data, then finally free the cache.
1926          * (See ticket [openssl.org #212].)
1927          */
1928         if (a->sessions != NULL)
1929                 SSL_CTX_flush_sessions(a,0);
1930
1931         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1932
1933         if (a->sessions != NULL)
1934                 lh_SSL_SESSION_free(a->sessions);
1935
1936         if (a->cert_store != NULL)
1937                 X509_STORE_free(a->cert_store);
1938         if (a->cipher_list != NULL)
1939                 sk_SSL_CIPHER_free(a->cipher_list);
1940         if (a->cipher_list_by_id != NULL)
1941                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1942         if (a->cert != NULL)
1943                 ssl_cert_free(a->cert);
1944         if (a->client_CA != NULL)
1945                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1946         if (a->extra_certs != NULL)
1947                 sk_X509_pop_free(a->extra_certs,X509_free);
1948 #if 0 /* This should never be done, since it removes a global database */
1949         if (a->comp_methods != NULL)
1950                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1951 #else
1952         a->comp_methods = NULL;
1953 #endif
1954
1955         if (a->srtp_profiles)
1956                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1957
1958 #ifndef OPENSSL_NO_PSK
1959         if (a->psk_identity_hint)
1960                 OPENSSL_free(a->psk_identity_hint);
1961 #endif
1962 #ifndef OPENSSL_NO_SRP
1963         SSL_CTX_SRP_CTX_free(a);
1964 #endif
1965 #ifndef OPENSSL_NO_ENGINE
1966         if (a->client_cert_engine)
1967                 ENGINE_finish(a->client_cert_engine);
1968 #endif
1969
1970 #ifndef OPENSSL_NO_BUF_FREELISTS
1971         if (a->wbuf_freelist)
1972                 ssl_buf_freelist_free(a->wbuf_freelist);
1973         if (a->rbuf_freelist)
1974                 ssl_buf_freelist_free(a->rbuf_freelist);
1975 #endif
1976
1977         OPENSSL_free(a);
1978         }
1979
1980 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1981         {
1982         ctx->default_passwd_callback=cb;
1983         }
1984
1985 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1986         {
1987         ctx->default_passwd_callback_userdata=u;
1988         }
1989
1990 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1991         {
1992         ctx->app_verify_callback=cb;
1993         ctx->app_verify_arg=arg;
1994         }
1995
1996 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1997         {
1998         ctx->verify_mode=mode;
1999         ctx->default_verify_callback=cb;
2000         }
2001
2002 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2003         {
2004         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2005         }
2006
2007 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2008         {
2009         CERT_PKEY *cpk;
2010         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2011         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2012         int rsa_tmp_export,dh_tmp_export,kl;
2013         unsigned long mask_k,mask_a,emask_k,emask_a;
2014         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2015 #ifndef OPENSSL_NO_ECDH
2016         int have_ecdh_tmp;
2017 #endif
2018         X509 *x = NULL;
2019         EVP_PKEY *ecc_pkey = NULL;
2020         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2021
2022         if (c == NULL) return;
2023
2024         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2025
2026 #ifndef OPENSSL_NO_RSA
2027         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2028         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2029                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2030 #else
2031         rsa_tmp=rsa_tmp_export=0;
2032 #endif
2033 #ifndef OPENSSL_NO_DH
2034         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2035         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2036                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2037 #else
2038         dh_tmp=dh_tmp_export=0;
2039 #endif
2040
2041 #ifndef OPENSSL_NO_ECDH
2042         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2043 #endif
2044         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2045         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2046         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2047         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2048         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2049         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2050         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2051         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2052         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2053         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2054         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2055 /* FIX THIS EAY EAY EAY */
2056         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2057         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2058         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2059         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2060         mask_k=0;
2061         mask_a=0;
2062         emask_k=0;
2063         emask_a=0;
2064
2065         
2066
2067 #ifdef CIPHER_DEBUG
2068         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2069                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2070                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2071 #endif
2072         
2073         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2074         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2075                 mask_k |= SSL_kGOST;
2076                 mask_a |= SSL_aGOST01;
2077         }
2078         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2079         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2080                 mask_k |= SSL_kGOST;
2081                 mask_a |= SSL_aGOST94;
2082         }
2083
2084         if (rsa_enc || (rsa_tmp && rsa_sign))
2085                 mask_k|=SSL_kRSA;
2086         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2087                 emask_k|=SSL_kRSA;
2088
2089 #if 0
2090         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2091         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2092                 (rsa_enc || rsa_sign || dsa_sign))
2093                 mask_k|=SSL_kEDH;
2094         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2095                 (rsa_enc || rsa_sign || dsa_sign))
2096                 emask_k|=SSL_kEDH;
2097 #endif
2098
2099         if (dh_tmp_export)
2100                 emask_k|=SSL_kEDH;
2101
2102         if (dh_tmp)
2103                 mask_k|=SSL_kEDH;
2104
2105         if (dh_rsa) mask_k|=SSL_kDHr;
2106         if (dh_rsa_export) emask_k|=SSL_kDHr;
2107
2108         if (dh_dsa) mask_k|=SSL_kDHd;
2109         if (dh_dsa_export) emask_k|=SSL_kDHd;
2110
2111         if (rsa_enc || rsa_sign)
2112                 {
2113                 mask_a|=SSL_aRSA;
2114                 emask_a|=SSL_aRSA;
2115                 }
2116
2117         if (dsa_sign)
2118                 {
2119                 mask_a|=SSL_aDSS;
2120                 emask_a|=SSL_aDSS;
2121                 }
2122
2123         mask_a|=SSL_aNULL;
2124         emask_a|=SSL_aNULL;
2125
2126 #ifndef OPENSSL_NO_KRB5
2127         mask_k|=SSL_kKRB5;
2128         mask_a|=SSL_aKRB5;
2129         emask_k|=SSL_kKRB5;
2130         emask_a|=SSL_aKRB5;
2131 #endif
2132
2133         /* An ECC certificate may be usable for ECDH and/or
2134          * ECDSA cipher suites depending on the key usage extension.
2135          */
2136         if (have_ecc_cert)
2137                 {
2138                 /* This call populates extension flags (ex_flags) */
2139                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2140                 X509_check_purpose(x, -1, 0);
2141                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2142                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2143                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2144                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2145                 ecc_pkey = X509_get_pubkey(x);
2146                 ecc_pkey_size = (ecc_pkey != NULL) ?
2147                     EVP_PKEY_bits(ecc_pkey) : 0;
2148                 EVP_PKEY_free(ecc_pkey);
2149                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2150                         {
2151                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2152                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2153                         }
2154 #ifndef OPENSSL_NO_ECDH
2155                 if (ecdh_ok)
2156                         {
2157
2158                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2159                                 {
2160                                 mask_k|=SSL_kECDHr;
2161                                 mask_a|=SSL_aECDH;
2162                                 if (ecc_pkey_size <= 163)
2163                                         {
2164                                         emask_k|=SSL_kECDHr;
2165                                         emask_a|=SSL_aECDH;
2166                                         }
2167                                 }
2168
2169                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2170                                 {
2171                                 mask_k|=SSL_kECDHe;
2172                                 mask_a|=SSL_aECDH;
2173                                 if (ecc_pkey_size <= 163)
2174                                         {
2175                                         emask_k|=SSL_kECDHe;
2176                                         emask_a|=SSL_aECDH;
2177                                         }
2178                                 }
2179                         }
2180 #endif
2181 #ifndef OPENSSL_NO_ECDSA
2182                 if (ecdsa_ok)
2183                         {
2184                         mask_a|=SSL_aECDSA;
2185                         emask_a|=SSL_aECDSA;
2186                         }
2187 #endif
2188                 }
2189
2190 #ifndef OPENSSL_NO_ECDH
2191         if (have_ecdh_tmp)
2192                 {
2193                 mask_k|=SSL_kEECDH;
2194                 emask_k|=SSL_kEECDH;
2195                 }
2196 #endif
2197
2198 #ifndef OPENSSL_NO_PSK
2199         mask_k |= SSL_kPSK;
2200         mask_a |= SSL_aPSK;
2201         emask_k |= SSL_kPSK;
2202         emask_a |= SSL_aPSK;
2203 #endif
2204
2205         c->mask_k=mask_k;
2206         c->mask_a=mask_a;
2207         c->export_mask_k=emask_k;
2208         c->export_mask_a=emask_a;
2209         c->valid=1;
2210         }
2211
2212 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2213 #define ku_reject(x, usage) \
2214         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2215
2216 #ifndef OPENSSL_NO_EC
2217
2218 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2219         {
2220         unsigned long alg_k, alg_a;
2221         EVP_PKEY *pkey = NULL;
2222         int keysize = 0;
2223         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2224         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2225
2226         alg_k = cs->algorithm_mkey;
2227         alg_a = cs->algorithm_auth;
2228
2229         if (SSL_C_IS_EXPORT(cs))
2230                 {
2231                 /* ECDH key length in export ciphers must be <= 163 bits */
2232                 pkey = X509_get_pubkey(x);
2233                 if (pkey == NULL) return 0;
2234                 keysize = EVP_PKEY_bits(pkey);
2235                 EVP_PKEY_free(pkey);
2236                 if (keysize > 163) return 0;
2237                 }
2238
2239         /* This call populates the ex_flags field correctly */
2240         X509_check_purpose(x, -1, 0);
2241         if ((x->sig_alg) && (x->sig_alg->algorithm))
2242                 {
2243                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2244                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2245                 }
2246         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2247                 {
2248                 /* key usage, if present, must allow key agreement */
2249                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2250                         {
2251                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2252                         return 0;
2253                         }
2254                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2255                         {
2256                         /* signature alg must be ECDSA */
2257                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2258                                 {
2259                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2260                                 return 0;
2261                                 }
2262                         }
2263                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2264                         {
2265                         /* signature alg must be RSA */
2266
2267                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2268                                 {
2269                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2270                                 return 0;
2271                                 }
2272                         }
2273                 }
2274         if (alg_a & SSL_aECDSA)
2275                 {
2276                 /* key usage, if present, must allow signing */
2277                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2278                         {
2279                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2280                         return 0;
2281                         }
2282                 }
2283
2284         return 1;  /* all checks are ok */
2285         }
2286
2287 #endif
2288
2289 /* THIS NEEDS CLEANING UP */
2290 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2291         {
2292         unsigned long alg_k,alg_a;
2293         CERT *c;
2294         int i;
2295
2296         c=s->cert;
2297         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2298         
2299         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2300         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2301
2302         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2303                 {
2304                 /* we don't need to look at SSL_kEECDH
2305                  * since no certificate is needed for
2306                  * anon ECDH and for authenticated
2307                  * EECDH, the check for the auth
2308                  * algorithm will set i correctly
2309                  * NOTE: For ECDH-RSA, we need an ECC
2310                  * not an RSA cert but for EECDH-RSA
2311                  * we need an RSA cert. Placing the
2312                  * checks for SSL_kECDH before RSA
2313                  * checks ensures the correct cert is chosen.
2314                  */
2315                 i=SSL_PKEY_ECC;
2316                 }
2317         else if (alg_a & SSL_aECDSA)
2318                 {
2319                 i=SSL_PKEY_ECC;
2320                 }
2321         else if (alg_k & SSL_kDHr)
2322                 i=SSL_PKEY_DH_RSA;
2323         else if (alg_k & SSL_kDHd)
2324                 i=SSL_PKEY_DH_DSA;
2325         else if (alg_a & SSL_aDSS)
2326                 i=SSL_PKEY_DSA_SIGN;
2327         else if (alg_a & SSL_aRSA)
2328                 {
2329                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2330                         i=SSL_PKEY_RSA_SIGN;
2331                 else
2332                         i=SSL_PKEY_RSA_ENC;
2333                 }
2334         else if (alg_a & SSL_aKRB5)
2335                 {
2336                 /* VRS something else here? */
2337                 return(NULL);
2338                 }
2339         else if (alg_a & SSL_aGOST94) 
2340                 i=SSL_PKEY_GOST94;
2341         else if (alg_a & SSL_aGOST01)
2342                 i=SSL_PKEY_GOST01;
2343         else /* if (alg_a & SSL_aNULL) */
2344                 {
2345                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_PKEY,ERR_R_INTERNAL_ERROR);
2346                 return(NULL);
2347                 }
2348
2349         return c->pkeys + i;
2350         }
2351
2352 X509 *ssl_get_server_send_cert(const SSL *s)
2353         {
2354         CERT_PKEY *cpk;
2355         cpk = ssl_get_server_send_pkey(s);
2356         if (!cpk)
2357                 return NULL;
2358         return cpk->x509;
2359         }
2360
2361 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2362         {
2363         unsigned long alg_a;
2364         CERT *c;
2365         int idx = -1;
2366
2367         alg_a = cipher->algorithm_auth;
2368         c=s->cert;
2369
2370         if ((alg_a & SSL_aDSS) &&
2371                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2372                 idx = SSL_PKEY_DSA_SIGN;
2373         else if (alg_a & SSL_aRSA)
2374                 {
2375                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2376                         idx = SSL_PKEY_RSA_SIGN;
2377                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2378                         idx = SSL_PKEY_RSA_ENC;
2379                 }
2380         else if ((alg_a & SSL_aECDSA) &&
2381                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2382                 idx = SSL_PKEY_ECC;
2383         if (idx == -1)
2384                 {
2385                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2386                 return(NULL);
2387                 }
2388         if (pmd)
2389                 *pmd = c->pkeys[idx].digest;
2390         return c->pkeys[idx].privatekey;
2391         }
2392
2393 void ssl_update_cache(SSL *s,int mode)
2394         {
2395         int i;
2396
2397         /* If the session_id_length is 0, we are not supposed to cache it,
2398          * and it would be rather hard to do anyway :-) */
2399         if (s->session->session_id_length == 0) return;
2400
2401         i=s->session_ctx->session_cache_mode;
2402         if ((i & mode) && (!s->hit)
2403                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2404                     || SSL_CTX_add_session(s->session_ctx,s->session))
2405                 && (s->session_ctx->new_session_cb != NULL))
2406                 {
2407                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2408                 if (!s->session_ctx->new_session_cb(s,s->session))
2409                         SSL_SESSION_free(s->session);
2410                 }
2411
2412         /* auto flush every 255 connections */
2413         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2414                 ((i & mode) == mode))
2415                 {
2416                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2417                         ?s->session_ctx->stats.sess_connect_good
2418                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2419                         {
2420                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2421                         }
2422                 }
2423         }
2424
2425 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2426         {
2427         return(s->method);
2428         }
2429
2430 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2431         {
2432         int conn= -1;
2433         int ret=1;
2434
2435         if (s->method != meth)
2436                 {
2437                 if (s->handshake_func != NULL)
2438                         conn=(s->handshake_func == s->method->ssl_connect);
2439
2440                 if (s->method->version == meth->version)
2441                         s->method=meth;
2442                 else
2443                         {
2444                         s->method->ssl_free(s);
2445                         s->method=meth;
2446                         ret=s->method->ssl_new(s);
2447                         }
2448
2449                 if (conn == 1)
2450                         s->handshake_func=meth->ssl_connect;
2451                 else if (conn == 0)
2452                         s->handshake_func=meth->ssl_accept;
2453                 }
2454         return(ret);
2455         }
2456
2457 int SSL_get_error(const SSL *s,int i)
2458         {
2459         int reason;
2460         unsigned long l;
2461         BIO *bio;
2462
2463         if (i > 0) return(SSL_ERROR_NONE);
2464
2465         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2466          * etc, where we do encode the error */
2467         if ((l=ERR_peek_error()) != 0)
2468                 {
2469                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2470                         return(SSL_ERROR_SYSCALL);
2471                 else
2472                         return(SSL_ERROR_SSL);
2473                 }
2474
2475         if ((i < 0) && SSL_want_read(s))
2476                 {
2477                 bio=SSL_get_rbio(s);
2478                 if (BIO_should_read(bio))
2479                         return(SSL_ERROR_WANT_READ);
2480                 else if (BIO_should_write(bio))
2481                         /* This one doesn't make too much sense ... We never try
2482                          * to write to the rbio, and an application program where
2483                          * rbio and wbio are separate couldn't even know what it
2484                          * should wait for.
2485                          * However if we ever set s->rwstate incorrectly
2486                          * (so that we have SSL_want_read(s) instead of
2487                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2488                          * this test works around that bug; so it might be safer
2489                          * to keep it. */
2490                         return(SSL_ERROR_WANT_WRITE);
2491                 else if (BIO_should_io_special(bio))
2492                         {
2493                         reason=BIO_get_retry_reason(bio);
2494                         if (reason == BIO_RR_CONNECT)
2495                                 return(SSL_ERROR_WANT_CONNECT);
2496                         else if (reason == BIO_RR_ACCEPT)
2497                                 return(SSL_ERROR_WANT_ACCEPT);
2498                         else
2499                                 return(SSL_ERROR_SYSCALL); /* unknown */
2500                         }
2501                 }
2502
2503         if ((i < 0) && SSL_want_write(s))
2504                 {
2505                 bio=SSL_get_wbio(s);
2506                 if (BIO_should_write(bio))
2507                         return(SSL_ERROR_WANT_WRITE);
2508                 else if (BIO_should_read(bio))
2509                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2510                         return(SSL_ERROR_WANT_READ);
2511                 else if (BIO_should_io_special(bio))
2512                         {
2513                         reason=BIO_get_retry_reason(bio);
2514                         if (reason == BIO_RR_CONNECT)
2515                                 return(SSL_ERROR_WANT_CONNECT);
2516                         else if (reason == BIO_RR_ACCEPT)
2517                                 return(SSL_ERROR_WANT_ACCEPT);
2518                         else
2519                                 return(SSL_ERROR_SYSCALL);
2520                         }
2521                 }
2522         if ((i < 0) && SSL_want_x509_lookup(s))
2523                 {
2524                 return(SSL_ERROR_WANT_X509_LOOKUP);
2525                 }
2526
2527         if (i == 0)
2528                 {
2529                 if (s->version == SSL2_VERSION)
2530                         {
2531                         /* assume it is the socket being closed */
2532                         return(SSL_ERROR_ZERO_RETURN);
2533                         }
2534                 else
2535                         {
2536                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2537                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2538                                 return(SSL_ERROR_ZERO_RETURN);
2539                         }
2540                 }
2541         return(SSL_ERROR_SYSCALL);
2542         }
2543
2544 int SSL_do_handshake(SSL *s)
2545         {
2546         int ret=1;
2547
2548         if (s->handshake_func == NULL)
2549                 {
2550                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2551                 return(-1);
2552                 }
2553
2554         s->method->ssl_renegotiate_check(s);
2555
2556         if (SSL_in_init(s) || SSL_in_before(s))
2557                 {
2558                 ret=s->handshake_func(s);
2559                 }
2560         return(ret);
2561         }
2562
2563 /* For the next 2 functions, SSL_clear() sets shutdown and so
2564  * one of these calls will reset it */
2565 void SSL_set_accept_state(SSL *s)
2566         {
2567         s->server=1;
2568         s->shutdown=0;
2569         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2570         s->handshake_func=s->method->ssl_accept;
2571         /* clear the current cipher */
2572         ssl_clear_cipher_ctx(s);
2573         ssl_clear_hash_ctx(&s->read_hash);
2574         ssl_clear_hash_ctx(&s->write_hash);
2575         }
2576
2577 void SSL_set_connect_state(SSL *s)
2578         {
2579         s->server=0;
2580         s->shutdown=0;
2581         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2582         s->handshake_func=s->method->ssl_connect;
2583         /* clear the current cipher */
2584         ssl_clear_cipher_ctx(s);
2585         ssl_clear_hash_ctx(&s->read_hash);
2586         ssl_clear_hash_ctx(&s->write_hash);
2587         }
2588
2589 int ssl_undefined_function(SSL *s)
2590         {
2591         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2592         return(0);
2593         }
2594
2595 int ssl_undefined_void_function(void)
2596         {
2597         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2598         return(0);
2599         }
2600
2601 int ssl_undefined_const_function(const SSL *s)
2602         {
2603         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2604         return(0);
2605         }
2606
2607 SSL_METHOD *ssl_bad_method(int ver)
2608         {
2609         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2610         return(NULL);
2611         }
2612
2613 const char *SSL_get_version(const SSL *s)
2614         {
2615         if (s->version == TLS1_2_VERSION)
2616                 return("TLSv1.2");
2617         else if (s->version == TLS1_1_VERSION)
2618                 return("TLSv1.1");
2619         else if (s->version == TLS1_VERSION)
2620                 return("TLSv1");
2621         else if (s->version == SSL3_VERSION)
2622                 return("SSLv3");
2623         else if (s->version == SSL2_VERSION)
2624                 return("SSLv2");
2625         else
2626                 return("unknown");
2627         }
2628
2629 SSL *SSL_dup(SSL *s)
2630         {
2631         STACK_OF(X509_NAME) *sk;
2632         X509_NAME *xn;
2633         SSL *ret;
2634         int i;
2635         
2636         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2637             return(NULL);
2638
2639         ret->version = s->version;
2640         ret->type = s->type;
2641         ret->method = s->method;
2642
2643         if (s->session != NULL)
2644                 {
2645                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2646                 SSL_copy_session_id(ret,s);
2647                 }
2648         else
2649                 {
2650                 /* No session has been established yet, so we have to expect
2651                  * that s->cert or ret->cert will be changed later --
2652                  * they should not both point to the same object,
2653                  * and thus we can't use SSL_copy_session_id. */
2654
2655                 ret->method->ssl_free(ret);
2656                 ret->method = s->method;
2657                 ret->method->ssl_new(ret);
2658
2659                 if (s->cert != NULL)
2660                         {
2661                         if (ret->cert != NULL)
2662                                 {
2663                                 ssl_cert_free(ret->cert);
2664                                 }
2665                         ret->cert = ssl_cert_dup(s->cert);
2666                         if (ret->cert == NULL)
2667                                 goto err;
2668                         }
2669                                 
2670                 SSL_set_session_id_context(ret,
2671                         s->sid_ctx, s->sid_ctx_length);
2672                 }
2673
2674         ret->options=s->options;
2675         ret->mode=s->mode;
2676         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2677         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2678         ret->msg_callback = s->msg_callback;
2679         ret->msg_callback_arg = s->msg_callback_arg;
2680         SSL_set_verify(ret,SSL_get_verify_mode(s),
2681                 SSL_get_verify_callback(s));
2682         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2683         ret->generate_session_id = s->generate_session_id;
2684
2685         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2686         
2687         ret->debug=s->debug;
2688
2689         /* copy app data, a little dangerous perhaps */
2690         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2691                 goto err;
2692
2693         /* setup rbio, and wbio */
2694         if (s->rbio != NULL)
2695                 {
2696                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2697                         goto err;
2698                 }
2699         if (s->wbio != NULL)
2700                 {
2701                 if (s->wbio != s->rbio)
2702                         {
2703                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2704                                 goto err;
2705                         }
2706                 else
2707                         ret->wbio=ret->rbio;
2708                 }
2709         ret->rwstate = s->rwstate;
2710         ret->in_handshake = s->in_handshake;
2711         ret->handshake_func = s->handshake_func;
2712         ret->server = s->server;
2713         ret->renegotiate = s->renegotiate;
2714         ret->new_session = s->new_session;
2715         ret->quiet_shutdown = s->quiet_shutdown;
2716         ret->shutdown=s->shutdown;
2717         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2718         ret->rstate=s->rstate;
2719         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2720         ret->hit=s->hit;
2721
2722         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2723
2724         /* dup the cipher_list and cipher_list_by_id stacks */
2725         if (s->cipher_list != NULL)
2726                 {
2727                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2728                         goto err;
2729                 }
2730         if (s->cipher_list_by_id != NULL)
2731                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2732                         == NULL)
2733                         goto err;
2734
2735         /* Dup the client_CA list */
2736         if (s->client_CA != NULL)
2737                 {
2738                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2739                 ret->client_CA=sk;
2740                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2741                         {
2742                         xn=sk_X509_NAME_value(sk,i);
2743                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2744                                 {
2745                                 X509_NAME_free(xn);
2746                                 goto err;
2747                                 }
2748                         }
2749                 }
2750
2751         if (0)
2752                 {
2753 err:
2754                 if (ret != NULL) SSL_free(ret);
2755                 ret=NULL;
2756                 }
2757         return(ret);
2758         }
2759
2760 void ssl_clear_cipher_ctx(SSL *s)
2761         {
2762         if (s->enc_read_ctx != NULL)
2763                 {
2764                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2765                 OPENSSL_free(s->enc_read_ctx);
2766                 s->enc_read_ctx=NULL;
2767                 }
2768         if (s->enc_write_ctx != NULL)
2769                 {
2770                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2771                 OPENSSL_free(s->enc_write_ctx);
2772                 s->enc_write_ctx=NULL;
2773                 }
2774 #ifndef OPENSSL_NO_COMP
2775         if (s->expand != NULL)
2776                 {
2777                 COMP_CTX_free(s->expand);
2778                 s->expand=NULL;
2779                 }
2780         if (s->compress != NULL)
2781                 {
2782                 COMP_CTX_free(s->compress);
2783                 s->compress=NULL;
2784                 }
2785 #endif
2786         }
2787
2788 /* Fix this function so that it takes an optional type parameter */
2789 X509 *SSL_get_certificate(const SSL *s)
2790         {
2791         if (s->server)
2792                 return(ssl_get_server_send_cert(s));
2793         else if (s->cert != NULL)
2794                 return(s->cert->key->x509);
2795         else
2796                 return(NULL);
2797         }
2798
2799 /* Fix this function so that it takes an optional type parameter */
2800 EVP_PKEY *SSL_get_privatekey(SSL *s)
2801         {
2802         if (s->cert != NULL)
2803                 return(s->cert->key->privatekey);
2804         else
2805                 return(NULL);
2806         }
2807
2808 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2809         {
2810         if ((s->session != NULL) && (s->session->cipher != NULL))
2811                 return(s->session->cipher);
2812         return(NULL);
2813         }
2814 #ifdef OPENSSL_NO_COMP
2815 const void *SSL_get_current_compression(SSL *s)
2816         {
2817         return NULL;
2818         }
2819 const void *SSL_get_current_expansion(SSL *s)
2820         {
2821         return NULL;
2822         }
2823 #else
2824
2825 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2826         {
2827         if (s->compress != NULL)
2828                 return(s->compress->meth);
2829         return(NULL);
2830         }
2831
2832 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2833         {
2834         if (s->expand != NULL)
2835                 return(s->expand->meth);
2836         return(NULL);
2837         }
2838 #endif
2839
2840 int ssl_init_wbio_buffer(SSL *s,int push)
2841         {
2842         BIO *bbio;
2843
2844         if (s->bbio == NULL)
2845                 {
2846                 bbio=BIO_new(BIO_f_buffer());
2847                 if (bbio == NULL) return(0);
2848                 s->bbio=bbio;
2849                 }
2850         else
2851                 {
2852                 bbio=s->bbio;
2853                 if (s->bbio == s->wbio)
2854                         s->wbio=BIO_pop(s->wbio);
2855                 }
2856         (void)BIO_reset(bbio);
2857 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2858         if (!BIO_set_read_buffer_size(bbio,1))
2859                 {
2860                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2861                 return(0);
2862                 }
2863         if (push)
2864                 {
2865                 if (s->wbio != bbio)
2866                         s->wbio=BIO_push(bbio,s->wbio);
2867                 }
2868         else
2869                 {
2870                 if (s->wbio == bbio)
2871                         s->wbio=BIO_pop(bbio);
2872                 }
2873         return(1);
2874         }
2875
2876 void ssl_free_wbio_buffer(SSL *s)
2877         {
2878         if (s->bbio == NULL) return;
2879
2880         if (s->bbio == s->wbio)
2881                 {
2882                 /* remove buffering */
2883                 s->wbio=BIO_pop(s->wbio);
2884 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2885                 assert(s->wbio != NULL);
2886 #endif
2887         }
2888         BIO_free(s->bbio);
2889         s->bbio=NULL;
2890         }
2891         
2892 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2893         {
2894         ctx->quiet_shutdown=mode;
2895         }
2896
2897 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2898         {
2899         return(ctx->quiet_shutdown);
2900         }
2901
2902 void SSL_set_quiet_shutdown(SSL *s,int mode)
2903         {
2904         s->quiet_shutdown=mode;
2905         }
2906
2907 int SSL_get_quiet_shutdown(const SSL *s)
2908         {
2909         return(s->quiet_shutdown);
2910         }
2911
2912 void SSL_set_shutdown(SSL *s,int mode)
2913         {
2914         s->shutdown=mode;
2915         }
2916
2917 int SSL_get_shutdown(const SSL *s)
2918         {
2919         return(s->shutdown);
2920         }
2921
2922 int SSL_version(const SSL *s)
2923         {
2924         return(s->version);
2925         }
2926
2927 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2928         {
2929         return(ssl->ctx);
2930         }
2931
2932 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2933         {
2934         if (ssl->ctx == ctx)
2935                 return ssl->ctx;
2936 #ifndef OPENSSL_NO_TLSEXT
2937         if (ctx == NULL)
2938                 ctx = ssl->initial_ctx;
2939 #endif
2940         if (ssl->cert != NULL)
2941                 ssl_cert_free(ssl->cert);
2942         ssl->cert = ssl_cert_dup(ctx->cert);
2943         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2944         if (ssl->ctx != NULL)
2945                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2946         ssl->ctx = ctx;
2947         return(ssl->ctx);
2948         }
2949
2950 #ifndef OPENSSL_NO_STDIO
2951 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2952         {
2953         return(X509_STORE_set_default_paths(ctx->cert_store));
2954         }
2955
2956 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2957                 const char *CApath)
2958         {
2959         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2960         }
2961 #endif
2962
2963 void SSL_set_info_callback(SSL *ssl,
2964         void (*cb)(const SSL *ssl,int type,int val))
2965         {
2966         ssl->info_callback=cb;
2967         }
2968
2969 /* One compiler (Diab DCC) doesn't like argument names in returned
2970    function pointer.  */
2971 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2972         {
2973         return ssl->info_callback;
2974         }
2975
2976 int SSL_state(const SSL *ssl)
2977         {
2978         return(ssl->state);
2979         }
2980
2981 void SSL_set_state(SSL *ssl, int state)
2982         {
2983         ssl->state = state;
2984         }
2985
2986 void SSL_set_verify_result(SSL *ssl,long arg)
2987         {
2988         ssl->verify_result=arg;
2989         }
2990
2991 long SSL_get_verify_result(const SSL *ssl)
2992         {
2993         return(ssl->verify_result);
2994         }
2995
2996 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2997                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2998         {
2999         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3000                                 new_func, dup_func, free_func);
3001         }
3002
3003 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3004         {
3005         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3006         }
3007
3008 void *SSL_get_ex_data(const SSL *s,int idx)
3009         {
3010         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3011         }
3012
3013 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3014                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3015         {
3016         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3017                                 new_func, dup_func, free_func);
3018         }
3019
3020 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3021         {
3022         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3023         }
3024
3025 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3026         {
3027         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3028         }
3029
3030 int ssl_ok(SSL *s)
3031         {
3032         return(1);
3033         }
3034
3035 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3036         {
3037         return(ctx->cert_store);
3038         }
3039
3040 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3041         {
3042         if (ctx->cert_store != NULL)
3043                 X509_STORE_free(ctx->cert_store);
3044         ctx->cert_store=store;
3045         }
3046
3047 int SSL_want(const SSL *s)
3048         {
3049         return(s->rwstate);
3050         }
3051
3052 /*!
3053  * \brief Set the callback for generating temporary RSA keys.
3054  * \param ctx the SSL context.
3055  * \param cb the callback
3056  */
3057
3058 #ifndef OPENSSL_NO_RSA
3059 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3060                                                           int is_export,
3061                                                           int keylength))
3062     {
3063     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3064     }
3065
3066 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3067                                                   int is_export,
3068                                                   int keylength))
3069     {
3070     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3071     }
3072 #endif
3073
3074 #ifdef DOXYGEN
3075 /*!
3076  * \brief The RSA temporary key callback function.
3077  * \param ssl the SSL session.
3078  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3079  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3080  * of the required key in bits.
3081  * \return the temporary RSA key.
3082  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3083  */
3084
3085 RSA *cb(SSL *ssl,int is_export,int keylength)
3086     {}
3087 #endif
3088
3089 /*!
3090  * \brief Set the callback for generating temporary DH keys.
3091  * \param ctx the SSL context.
3092  * \param dh the callback
3093  */
3094
3095 #ifndef OPENSSL_NO_DH
3096 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3097                                                         int keylength))
3098         {
3099         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3100         }
3101
3102 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3103                                                 int keylength))
3104         {
3105         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3106         }
3107 #endif
3108
3109 #ifndef OPENSSL_NO_ECDH
3110 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3111                                                                 int keylength))
3112         {
3113         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3114         }
3115
3116 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3117                                                         int keylength))
3118         {
3119         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3120         }
3121 #endif
3122
3123 #ifndef OPENSSL_NO_PSK
3124 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3125         {
3126         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3127                 {
3128                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3129                 return 0;
3130                 }
3131         if (ctx->psk_identity_hint != NULL)
3132                 OPENSSL_free(ctx->psk_identity_hint);
3133         if (identity_hint != NULL)
3134                 {
3135                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3136                 if (ctx->psk_identity_hint == NULL)
3137                         return 0;
3138                 }
3139         else
3140                 ctx->psk_identity_hint = NULL;
3141         return 1;
3142         }
3143
3144 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3145         {
3146         if (s == NULL)
3147                 return 0;
3148
3149         if (s->session == NULL)
3150                 return 1; /* session not created yet, ignored */
3151
3152         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3153                 {
3154                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3155                 return 0;
3156                 }
3157         if (s->session->psk_identity_hint != NULL)
3158                 OPENSSL_free(s->session->psk_identity_hint);
3159         if (identity_hint != NULL)
3160                 {
3161                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3162                 if (s->session->psk_identity_hint == NULL)
3163                         return 0;
3164                 }
3165         else
3166                 s->session->psk_identity_hint = NULL;
3167         return 1;
3168         }
3169
3170 const char *SSL_get_psk_identity_hint(const SSL *s)
3171         {
3172         if (s == NULL || s->session == NULL)
3173                 return NULL;
3174         return(s->session->psk_identity_hint);
3175         }
3176
3177 const char *SSL_get_psk_identity(const SSL *s)
3178         {
3179         if (s == NULL || s->session == NULL)
3180                 return NULL;
3181         return(s->session->psk_identity);
3182         }
3183
3184 void SSL_set_psk_client_callback(SSL *s,
3185     unsigned int (*cb)(SSL *ssl, const char *hint,
3186                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3187                        unsigned int max_psk_len))
3188         {
3189         s->psk_client_callback = cb;
3190         }
3191
3192 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3193     unsigned int (*cb)(SSL *ssl, const char *hint,
3194                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3195                        unsigned int max_psk_len))
3196         {
3197         ctx->psk_client_callback = cb;
3198         }
3199
3200 void SSL_set_psk_server_callback(SSL *s,
3201     unsigned int (*cb)(SSL *ssl, const char *identity,
3202                        unsigned char *psk, unsigned int max_psk_len))
3203         {
3204         s->psk_server_callback = cb;
3205         }
3206
3207 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3208     unsigned int (*cb)(SSL *ssl, const char *identity,
3209                        unsigned char *psk, unsigned int max_psk_len))
3210         {
3211         ctx->psk_server_callback = cb;
3212         }
3213 #endif
3214
3215 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))
3216         {
3217         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3218         }
3219 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))
3220         {
3221         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3222         }
3223
3224 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3225  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3226  * any. If EVP_MD pointer is passed, initializes ctx with this md
3227  * Returns newly allocated ctx;
3228  */
3229
3230 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
3231 {
3232         ssl_clear_hash_ctx(hash);
3233         *hash = EVP_MD_CTX_create();
3234         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3235         return *hash;
3236 }
3237 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
3238 {
3239
3240         if (*hash) EVP_MD_CTX_destroy(*hash);
3241         *hash=NULL;
3242 }
3243
3244 void SSL_set_debug(SSL *s, int debug)
3245         {
3246         s->debug = debug;
3247         }
3248
3249 int SSL_cache_hit(SSL *s)
3250         {
3251         return s->hit;
3252         }
3253
3254 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3255 #include "../crypto/bio/bss_file.c"
3256 #endif
3257
3258 IMPLEMENT_STACK_OF(SSL_CIPHER)
3259 IMPLEMENT_STACK_OF(SSL_COMP)
3260 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3261                                     ssl_cipher_id);