Revise ssl code to use a CERT_PKEY structure when outputting a
[openssl.git] / ssl / ssl_lib.c
1 /*! \file ssl/ssl_lib.c
2  *  \brief Version independent SSL functions.
3  */
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5  * All rights reserved.
6  *
7  * This package is an SSL implementation written
8  * by Eric Young (eay@cryptsoft.com).
9  * The implementation was written so as to conform with Netscapes SSL.
10  * 
11  * This library is free for commercial and non-commercial use as long as
12  * the following conditions are aheared to.  The following conditions
13  * apply to all code found in this distribution, be it the RC4, RSA,
14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
15  * included with this distribution is covered by the same copyright terms
16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
17  * 
18  * Copyright remains Eric Young's, and as such any Copyright notices in
19  * the code are not to be removed.
20  * If this package is used in a product, Eric Young should be given attribution
21  * as the author of the parts of the library used.
22  * This can be in the form of a textual message at program startup or
23  * in documentation (online or textual) provided with the package.
24  * 
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
28  * 1. Redistributions of source code must retain the copyright
29  *    notice, this list of conditions and the following disclaimer.
30  * 2. Redistributions in binary form must reproduce the above copyright
31  *    notice, this list of conditions and the following disclaimer in the
32  *    documentation and/or other materials provided with the distribution.
33  * 3. All advertising materials mentioning features or use of this software
34  *    must display the following acknowledgement:
35  *    "This product includes cryptographic software written by
36  *     Eric Young (eay@cryptsoft.com)"
37  *    The word 'cryptographic' can be left out if the rouines from the library
38  *    being used are not cryptographic related :-).
39  * 4. If you include any Windows specific code (or a derivative thereof) from 
40  *    the apps directory (application code) you must include an acknowledgement:
41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
42  * 
43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53  * SUCH DAMAGE.
54  * 
55  * The licence and distribution terms for any publically available version or
56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
57  * copied and put under another distribution licence
58  * [including the GNU Public Licence.]
59  */
60 /* ====================================================================
61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
62  *
63  * Redistribution and use in source and binary forms, with or without
64  * modification, are permitted provided that the following conditions
65  * are met:
66  *
67  * 1. Redistributions of source code must retain the above copyright
68  *    notice, this list of conditions and the following disclaimer. 
69  *
70  * 2. Redistributions in binary form must reproduce the above copyright
71  *    notice, this list of conditions and the following disclaimer in
72  *    the documentation and/or other materials provided with the
73  *    distribution.
74  *
75  * 3. All advertising materials mentioning features or use of this
76  *    software must display the following acknowledgment:
77  *    "This product includes software developed by the OpenSSL Project
78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
79  *
80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81  *    endorse or promote products derived from this software without
82  *    prior written permission. For written permission, please contact
83  *    openssl-core@openssl.org.
84  *
85  * 5. Products derived from this software may not be called "OpenSSL"
86  *    nor may "OpenSSL" appear in their names without prior written
87  *    permission of the OpenSSL Project.
88  *
89  * 6. Redistributions of any form whatsoever must retain the following
90  *    acknowledgment:
91  *    "This product includes software developed by the OpenSSL Project
92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
93  *
94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105  * OF THE POSSIBILITY OF SUCH DAMAGE.
106  * ====================================================================
107  *
108  * This product includes cryptographic software written by Eric Young
109  * (eay@cryptsoft.com).  This product includes software written by Tim
110  * Hudson (tjh@cryptsoft.com).
111  *
112  */
113 /* ====================================================================
114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115  * ECC cipher suite support in OpenSSL originally developed by 
116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117  */
118 /* ====================================================================
119  * Copyright 2005 Nokia. All rights reserved.
120  *
121  * The portions of the attached software ("Contribution") is developed by
122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
123  * license.
124  *
125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
127  * support (see RFC 4279) to OpenSSL.
128  *
129  * No patent licenses or other rights except those expressly stated in
130  * the OpenSSL open source license shall be deemed granted or received
131  * expressly, by implication, estoppel, or otherwise.
132  *
133  * No assurances are provided by Nokia that the Contribution does not
134  * infringe the patent or other intellectual property rights of any third
135  * party or that the license provides you with all the necessary rights
136  * to make use of the Contribution.
137  *
138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
142  * OTHERWISE.
143  */
144
145 #ifdef REF_CHECK
146 #  include <assert.h>
147 #endif
148 #include <stdio.h>
149 #include <openssl/crypto.h>
150 #include "ssl_locl.h"
151 #include "kssl_lcl.h"
152 #include <openssl/objects.h>
153 #include <openssl/lhash.h>
154 #include <openssl/x509v3.h>
155 #include <openssl/rand.h>
156 #include <openssl/ocsp.h>
157 #ifndef OPENSSL_NO_DH
158 #include <openssl/dh.h>
159 #endif
160 #ifndef OPENSSL_NO_ENGINE
161 #include <openssl/engine.h>
162 #endif
163
164 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
165
166 SSL3_ENC_METHOD ssl3_undef_enc_method={
167         /* evil casts, but these functions are only called if there's a library bug */
168         (int (*)(SSL *,int))ssl_undefined_function,
169         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
170         ssl_undefined_function,
171         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
172         (int (*)(SSL*, int))ssl_undefined_function,
173         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
174         0,      /* finish_mac_length */
175         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
176         NULL,   /* client_finished_label */
177         0,      /* client_finished_label_len */
178         NULL,   /* server_finished_label */
179         0,      /* server_finished_label_len */
180         (int (*)(int))ssl_undefined_function,
181         (int (*)(SSL *, unsigned char *, unsigned int, const char *,
182                  unsigned int, const unsigned char *, unsigned int,
183                  int use_context))ssl_undefined_function,
184         };
185
186 int SSL_clear(SSL *s)
187         {
188
189         if (s->method == NULL)
190                 {
191                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
192                 return(0);
193                 }
194
195         if (ssl_clear_bad_session(s))
196                 {
197                 SSL_SESSION_free(s->session);
198                 s->session=NULL;
199                 }
200
201         s->error=0;
202         s->hit=0;
203         s->shutdown=0;
204
205 #if 0 /* Disabled since version 1.10 of this file (early return not
206        * needed because SSL_clear is not called when doing renegotiation) */
207         /* This is set if we are doing dynamic renegotiation so keep
208          * the old cipher.  It is sort of a SSL_clear_lite :-) */
209         if (s->renegotiate) return(1);
210 #else
211         if (s->renegotiate)
212                 {
213                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
214                 return 0;
215                 }
216 #endif
217
218         s->type=0;
219
220         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
221
222         s->version=s->method->version;
223         s->client_version=s->version;
224         s->rwstate=SSL_NOTHING;
225         s->rstate=SSL_ST_READ_HEADER;
226 #if 0
227         s->read_ahead=s->ctx->read_ahead;
228 #endif
229
230         if (s->init_buf != NULL)
231                 {
232                 BUF_MEM_free(s->init_buf);
233                 s->init_buf=NULL;
234                 }
235
236         ssl_clear_cipher_ctx(s);
237         ssl_clear_hash_ctx(&s->read_hash);
238         ssl_clear_hash_ctx(&s->write_hash);
239
240         s->first_packet=0;
241
242 #if 1
243         /* Check to see if we were changed into a different method, if
244          * so, revert back if we are not doing session-id reuse. */
245         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
246                 {
247                 s->method->ssl_free(s);
248                 s->method=s->ctx->method;
249                 if (!s->method->ssl_new(s))
250                         return(0);
251                 }
252         else
253 #endif
254                 s->method->ssl_clear(s);
255         return(1);
256         }
257
258 /** Used to change an SSL_CTXs default SSL method type */
259 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
260         {
261         STACK_OF(SSL_CIPHER) *sk;
262
263         ctx->method=meth;
264
265         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
266                 &(ctx->cipher_list_by_id),
267                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
268         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
269                 {
270                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
271                 return(0);
272                 }
273         return(1);
274         }
275
276 SSL *SSL_new(SSL_CTX *ctx)
277         {
278         SSL *s;
279
280         if (ctx == NULL)
281                 {
282                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
283                 return(NULL);
284                 }
285         if (ctx->method == NULL)
286                 {
287                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
288                 return(NULL);
289                 }
290
291         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
292         if (s == NULL) goto err;
293         memset(s,0,sizeof(SSL));
294
295 #ifndef OPENSSL_NO_KRB5
296         s->kssl_ctx = kssl_ctx_new();
297 #endif  /* OPENSSL_NO_KRB5 */
298
299         s->options=ctx->options;
300         s->mode=ctx->mode;
301         s->max_cert_list=ctx->max_cert_list;
302
303         if (ctx->cert != NULL)
304                 {
305                 /* Earlier library versions used to copy the pointer to
306                  * the CERT, not its contents; only when setting new
307                  * parameters for the per-SSL copy, ssl_cert_new would be
308                  * called (and the direct reference to the per-SSL_CTX
309                  * settings would be lost, but those still were indirectly
310                  * accessed for various purposes, and for that reason they
311                  * used to be known as s->ctx->default_cert).
312                  * Now we don't look at the SSL_CTX's CERT after having
313                  * duplicated it once. */
314
315                 s->cert = ssl_cert_dup(ctx->cert);
316                 if (s->cert == NULL)
317                         goto err;
318                 }
319         else
320                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
321
322         s->read_ahead=ctx->read_ahead;
323         s->msg_callback=ctx->msg_callback;
324         s->msg_callback_arg=ctx->msg_callback_arg;
325         s->verify_mode=ctx->verify_mode;
326         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
327 #if 0
328         s->verify_depth=ctx->verify_depth;
329 #endif
330         s->sid_ctx_length=ctx->sid_ctx_length;
331         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
332         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
333         s->verify_callback=ctx->default_verify_callback;
334         s->generate_session_id=ctx->generate_session_id;
335
336         s->param = X509_VERIFY_PARAM_new();
337         if (!s->param)
338                 goto err;
339         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
340 #if 0
341         s->purpose = ctx->purpose;
342         s->trust = ctx->trust;
343 #endif
344         s->quiet_shutdown=ctx->quiet_shutdown;
345         s->max_send_fragment = ctx->max_send_fragment;
346
347         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
348         s->ctx=ctx;
349 #ifndef OPENSSL_NO_TLSEXT
350         s->tlsext_debug_cb = 0;
351         s->tlsext_debug_arg = NULL;
352         s->tlsext_ticket_expected = 0;
353         s->tlsext_status_type = -1;
354         s->tlsext_status_expected = 0;
355         s->tlsext_ocsp_ids = NULL;
356         s->tlsext_ocsp_exts = NULL;
357         s->tlsext_ocsp_resp = NULL;
358         s->tlsext_ocsp_resplen = -1;
359         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
360         s->initial_ctx=ctx;
361 # ifndef OPENSSL_NO_NEXTPROTONEG
362         s->next_proto_negotiated = NULL;
363 # endif
364 #endif
365
366         s->verify_result=X509_V_OK;
367
368         s->method=ctx->method;
369
370         if (!s->method->ssl_new(s))
371                 goto err;
372
373         s->references=1;
374         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
375
376         SSL_clear(s);
377
378         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
379
380 #ifndef OPENSSL_NO_PSK
381         s->psk_client_callback=ctx->psk_client_callback;
382         s->psk_server_callback=ctx->psk_server_callback;
383 #endif
384
385         return(s);
386 err:
387         if (s != NULL)
388                 {
389                 if (s->cert != NULL)
390                         ssl_cert_free(s->cert);
391                 if (s->ctx != NULL)
392                         SSL_CTX_free(s->ctx); /* decrement reference count */
393                 OPENSSL_free(s);
394                 }
395         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
396         return(NULL);
397         }
398
399 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
400                                    unsigned int sid_ctx_len)
401     {
402     if(sid_ctx_len > sizeof ctx->sid_ctx)
403         {
404         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
405         return 0;
406         }
407     ctx->sid_ctx_length=sid_ctx_len;
408     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
409
410     return 1;
411     }
412
413 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
414                                unsigned int sid_ctx_len)
415     {
416     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
417         {
418         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
419         return 0;
420         }
421     ssl->sid_ctx_length=sid_ctx_len;
422     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
423
424     return 1;
425     }
426
427 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
428         {
429         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
430         ctx->generate_session_id = cb;
431         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
432         return 1;
433         }
434
435 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
436         {
437         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
438         ssl->generate_session_id = cb;
439         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
440         return 1;
441         }
442
443 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
444                                 unsigned int id_len)
445         {
446         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
447          * we can "construct" a session to give us the desired check - ie. to
448          * find if there's a session in the hash table that would conflict with
449          * any new session built out of this id/id_len and the ssl_version in
450          * use by this SSL. */
451         SSL_SESSION r, *p;
452
453         if(id_len > sizeof r.session_id)
454                 return 0;
455
456         r.ssl_version = ssl->version;
457         r.session_id_length = id_len;
458         memcpy(r.session_id, id, id_len);
459         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
460          * callback is calling us to check the uniqueness of a shorter ID, it
461          * must be compared as a padded-out ID because that is what it will be
462          * converted to when the callback has finished choosing it. */
463         if((r.ssl_version == SSL2_VERSION) &&
464                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
465                 {
466                 memset(r.session_id + id_len, 0,
467                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
468                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
469                 }
470
471         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
472         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
473         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
474         return (p != NULL);
475         }
476
477 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
478         {
479         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
480         }
481
482 int SSL_set_purpose(SSL *s, int purpose)
483         {
484         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
485         }
486
487 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
488         {
489         return X509_VERIFY_PARAM_set_trust(s->param, trust);
490         }
491
492 int SSL_set_trust(SSL *s, int trust)
493         {
494         return X509_VERIFY_PARAM_set_trust(s->param, trust);
495         }
496
497 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
498         {
499         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
500         }
501
502 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
503         {
504         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
505         }
506
507 void SSL_free(SSL *s)
508         {
509         int i;
510
511         if(s == NULL)
512             return;
513
514         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
515 #ifdef REF_PRINT
516         REF_PRINT("SSL",s);
517 #endif
518         if (i > 0) return;
519 #ifdef REF_CHECK
520         if (i < 0)
521                 {
522                 fprintf(stderr,"SSL_free, bad reference count\n");
523                 abort(); /* ok */
524                 }
525 #endif
526
527         if (s->param)
528                 X509_VERIFY_PARAM_free(s->param);
529
530         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
531
532         if (s->bbio != NULL)
533                 {
534                 /* If the buffering BIO is in place, pop it off */
535                 if (s->bbio == s->wbio)
536                         {
537                         s->wbio=BIO_pop(s->wbio);
538                         }
539                 BIO_free(s->bbio);
540                 s->bbio=NULL;
541                 }
542         if (s->rbio != NULL)
543                 BIO_free_all(s->rbio);
544         if ((s->wbio != NULL) && (s->wbio != s->rbio))
545                 BIO_free_all(s->wbio);
546
547         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
548
549         /* add extra stuff */
550         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
551         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
552
553         /* Make the next call work :-) */
554         if (s->session != NULL)
555                 {
556                 ssl_clear_bad_session(s);
557                 SSL_SESSION_free(s->session);
558                 }
559
560         ssl_clear_cipher_ctx(s);
561         ssl_clear_hash_ctx(&s->read_hash);
562         ssl_clear_hash_ctx(&s->write_hash);
563
564         if (s->cert != NULL) ssl_cert_free(s->cert);
565         /* Free up if allocated */
566
567 #ifndef OPENSSL_NO_TLSEXT
568         if (s->tlsext_hostname)
569                 OPENSSL_free(s->tlsext_hostname);
570         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
571 #ifndef OPENSSL_NO_EC
572         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
573         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
574 #endif /* OPENSSL_NO_EC */
575         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
576         if (s->tlsext_ocsp_exts)
577                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
578                                                 X509_EXTENSION_free);
579         if (s->tlsext_ocsp_ids)
580                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
581         if (s->tlsext_ocsp_resp)
582                 OPENSSL_free(s->tlsext_ocsp_resp);
583 #endif
584
585         if (s->client_CA != NULL)
586                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
587
588         if (s->method != NULL) s->method->ssl_free(s);
589
590         if (s->ctx) SSL_CTX_free(s->ctx);
591
592 #ifndef OPENSSL_NO_KRB5
593         if (s->kssl_ctx != NULL)
594                 kssl_ctx_free(s->kssl_ctx);
595 #endif  /* OPENSSL_NO_KRB5 */
596
597 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
598         if (s->next_proto_negotiated)
599                 OPENSSL_free(s->next_proto_negotiated);
600 #endif
601
602         if (s->srtp_profiles)
603             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
604
605         OPENSSL_free(s);
606         }
607
608 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
609         {
610         /* If the output buffering BIO is still in place, remove it
611          */
612         if (s->bbio != NULL)
613                 {
614                 if (s->wbio == s->bbio)
615                         {
616                         s->wbio=s->wbio->next_bio;
617                         s->bbio->next_bio=NULL;
618                         }
619                 }
620         if ((s->rbio != NULL) && (s->rbio != rbio))
621                 BIO_free_all(s->rbio);
622         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
623                 BIO_free_all(s->wbio);
624         s->rbio=rbio;
625         s->wbio=wbio;
626         }
627
628 BIO *SSL_get_rbio(const SSL *s)
629         { return(s->rbio); }
630
631 BIO *SSL_get_wbio(const SSL *s)
632         { return(s->wbio); }
633
634 int SSL_get_fd(const SSL *s)
635         {
636         return(SSL_get_rfd(s));
637         }
638
639 int SSL_get_rfd(const SSL *s)
640         {
641         int ret= -1;
642         BIO *b,*r;
643
644         b=SSL_get_rbio(s);
645         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
646         if (r != NULL)
647                 BIO_get_fd(r,&ret);
648         return(ret);
649         }
650
651 int SSL_get_wfd(const SSL *s)
652         {
653         int ret= -1;
654         BIO *b,*r;
655
656         b=SSL_get_wbio(s);
657         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
658         if (r != NULL)
659                 BIO_get_fd(r,&ret);
660         return(ret);
661         }
662
663 #ifndef OPENSSL_NO_SOCK
664 int SSL_set_fd(SSL *s,int fd)
665         {
666         int ret=0;
667         BIO *bio=NULL;
668
669         bio=BIO_new(BIO_s_socket());
670
671         if (bio == NULL)
672                 {
673                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
674                 goto err;
675                 }
676         BIO_set_fd(bio,fd,BIO_NOCLOSE);
677         SSL_set_bio(s,bio,bio);
678         ret=1;
679 err:
680         return(ret);
681         }
682
683 int SSL_set_wfd(SSL *s,int fd)
684         {
685         int ret=0;
686         BIO *bio=NULL;
687
688         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
689                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
690                 {
691                 bio=BIO_new(BIO_s_socket());
692
693                 if (bio == NULL)
694                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
695                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
696                 SSL_set_bio(s,SSL_get_rbio(s),bio);
697                 }
698         else
699                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
700         ret=1;
701 err:
702         return(ret);
703         }
704
705 int SSL_set_rfd(SSL *s,int fd)
706         {
707         int ret=0;
708         BIO *bio=NULL;
709
710         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
711                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
712                 {
713                 bio=BIO_new(BIO_s_socket());
714
715                 if (bio == NULL)
716                         {
717                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
718                         goto err;
719                         }
720                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
721                 SSL_set_bio(s,bio,SSL_get_wbio(s));
722                 }
723         else
724                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
725         ret=1;
726 err:
727         return(ret);
728         }
729 #endif
730
731
732 /* return length of latest Finished message we sent, copy to 'buf' */
733 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
734         {
735         size_t ret = 0;
736         
737         if (s->s3 != NULL)
738                 {
739                 ret = s->s3->tmp.finish_md_len;
740                 if (count > ret)
741                         count = ret;
742                 memcpy(buf, s->s3->tmp.finish_md, count);
743                 }
744         return ret;
745         }
746
747 /* return length of latest Finished message we expected, copy to 'buf' */
748 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
749         {
750         size_t ret = 0;
751         
752         if (s->s3 != NULL)
753                 {
754                 ret = s->s3->tmp.peer_finish_md_len;
755                 if (count > ret)
756                         count = ret;
757                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
758                 }
759         return ret;
760         }
761
762
763 int SSL_get_verify_mode(const SSL *s)
764         {
765         return(s->verify_mode);
766         }
767
768 int SSL_get_verify_depth(const SSL *s)
769         {
770         return X509_VERIFY_PARAM_get_depth(s->param);
771         }
772
773 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
774         {
775         return(s->verify_callback);
776         }
777
778 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
779         {
780         return(ctx->verify_mode);
781         }
782
783 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
784         {
785         return X509_VERIFY_PARAM_get_depth(ctx->param);
786         }
787
788 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
789         {
790         return(ctx->default_verify_callback);
791         }
792
793 void SSL_set_verify(SSL *s,int mode,
794                     int (*callback)(int ok,X509_STORE_CTX *ctx))
795         {
796         s->verify_mode=mode;
797         if (callback != NULL)
798                 s->verify_callback=callback;
799         }
800
801 void SSL_set_verify_depth(SSL *s,int depth)
802         {
803         X509_VERIFY_PARAM_set_depth(s->param, depth);
804         }
805
806 void SSL_set_read_ahead(SSL *s,int yes)
807         {
808         s->read_ahead=yes;
809         }
810
811 int SSL_get_read_ahead(const SSL *s)
812         {
813         return(s->read_ahead);
814         }
815
816 int SSL_pending(const SSL *s)
817         {
818         /* SSL_pending cannot work properly if read-ahead is enabled
819          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
820          * and it is impossible to fix since SSL_pending cannot report
821          * errors that may be observed while scanning the new data.
822          * (Note that SSL_pending() is often used as a boolean value,
823          * so we'd better not return -1.)
824          */
825         return(s->method->ssl_pending(s));
826         }
827
828 X509 *SSL_get_peer_certificate(const SSL *s)
829         {
830         X509 *r;
831         
832         if ((s == NULL) || (s->session == NULL))
833                 r=NULL;
834         else
835                 r=s->session->peer;
836
837         if (r == NULL) return(r);
838
839         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
840
841         return(r);
842         }
843
844 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
845         {
846         STACK_OF(X509) *r;
847         
848         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
849                 r=NULL;
850         else
851                 r=s->session->sess_cert->cert_chain;
852
853         /* If we are a client, cert_chain includes the peer's own
854          * certificate; if we are a server, it does not. */
855         
856         return(r);
857         }
858
859 /* Now in theory, since the calling process own 't' it should be safe to
860  * modify.  We need to be able to read f without being hassled */
861 void SSL_copy_session_id(SSL *t,const SSL *f)
862         {
863         CERT *tmp;
864
865         /* Do we need to to SSL locking? */
866         SSL_set_session(t,SSL_get_session(f));
867
868         /* what if we are setup as SSLv2 but want to talk SSLv3 or
869          * vice-versa */
870         if (t->method != f->method)
871                 {
872                 t->method->ssl_free(t); /* cleanup current */
873                 t->method=f->method;    /* change method */
874                 t->method->ssl_new(t);  /* setup new */
875                 }
876
877         tmp=t->cert;
878         if (f->cert != NULL)
879                 {
880                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
881                 t->cert=f->cert;
882                 }
883         else
884                 t->cert=NULL;
885         if (tmp != NULL) ssl_cert_free(tmp);
886         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
887         }
888
889 /* Fix this so it checks all the valid key/cert options */
890 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
891         {
892         if (    (ctx == NULL) ||
893                 (ctx->cert == NULL) ||
894                 (ctx->cert->key->x509 == NULL))
895                 {
896                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
897                 return(0);
898                 }
899         if      (ctx->cert->key->privatekey == NULL)
900                 {
901                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
902                 return(0);
903                 }
904         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
905         }
906
907 /* Fix this function so that it takes an optional type parameter */
908 int SSL_check_private_key(const SSL *ssl)
909         {
910         if (ssl == NULL)
911                 {
912                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
913                 return(0);
914                 }
915         if (ssl->cert == NULL)
916                 {
917                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
918                 return 0;
919                 }
920         if (ssl->cert->key->x509 == NULL)
921                 {
922                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
923                 return(0);
924                 }
925         if (ssl->cert->key->privatekey == NULL)
926                 {
927                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
928                 return(0);
929                 }
930         return(X509_check_private_key(ssl->cert->key->x509,
931                 ssl->cert->key->privatekey));
932         }
933
934 int SSL_accept(SSL *s)
935         {
936         if (s->handshake_func == 0)
937                 /* Not properly initialized yet */
938                 SSL_set_accept_state(s);
939
940         return(s->method->ssl_accept(s));
941         }
942
943 int SSL_connect(SSL *s)
944         {
945         if (s->handshake_func == 0)
946                 /* Not properly initialized yet */
947                 SSL_set_connect_state(s);
948
949         return(s->method->ssl_connect(s));
950         }
951
952 long SSL_get_default_timeout(const SSL *s)
953         {
954         return(s->method->get_timeout());
955         }
956
957 int SSL_read(SSL *s,void *buf,int num)
958         {
959         if (s->handshake_func == 0)
960                 {
961                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
962                 return -1;
963                 }
964
965         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
966                 {
967                 s->rwstate=SSL_NOTHING;
968                 return(0);
969                 }
970         return(s->method->ssl_read(s,buf,num));
971         }
972
973 int SSL_peek(SSL *s,void *buf,int num)
974         {
975         if (s->handshake_func == 0)
976                 {
977                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
978                 return -1;
979                 }
980
981         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
982                 {
983                 return(0);
984                 }
985         return(s->method->ssl_peek(s,buf,num));
986         }
987
988 int SSL_write(SSL *s,const void *buf,int num)
989         {
990         if (s->handshake_func == 0)
991                 {
992                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
993                 return -1;
994                 }
995
996         if (s->shutdown & SSL_SENT_SHUTDOWN)
997                 {
998                 s->rwstate=SSL_NOTHING;
999                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1000                 return(-1);
1001                 }
1002         return(s->method->ssl_write(s,buf,num));
1003         }
1004
1005 int SSL_shutdown(SSL *s)
1006         {
1007         /* Note that this function behaves differently from what one might
1008          * expect.  Return values are 0 for no success (yet),
1009          * 1 for success; but calling it once is usually not enough,
1010          * even if blocking I/O is used (see ssl3_shutdown).
1011          */
1012
1013         if (s->handshake_func == 0)
1014                 {
1015                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1016                 return -1;
1017                 }
1018
1019         if ((s != NULL) && !SSL_in_init(s))
1020                 return(s->method->ssl_shutdown(s));
1021         else
1022                 return(1);
1023         }
1024
1025 int SSL_renegotiate(SSL *s)
1026         {
1027         if (s->renegotiate == 0)
1028                 s->renegotiate=1;
1029
1030         s->new_session=1;
1031
1032         return(s->method->ssl_renegotiate(s));
1033         }
1034
1035 int SSL_renegotiate_abbreviated(SSL *s)
1036         {
1037         if (s->renegotiate == 0)
1038                 s->renegotiate=1;
1039
1040         s->new_session=0;
1041
1042         return(s->method->ssl_renegotiate(s));
1043         }
1044
1045 int SSL_renegotiate_pending(SSL *s)
1046         {
1047         /* becomes true when negotiation is requested;
1048          * false again once a handshake has finished */
1049         return (s->renegotiate != 0);
1050         }
1051
1052 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1053         {
1054         long l;
1055
1056         switch (cmd)
1057                 {
1058         case SSL_CTRL_GET_READ_AHEAD:
1059                 return(s->read_ahead);
1060         case SSL_CTRL_SET_READ_AHEAD:
1061                 l=s->read_ahead;
1062                 s->read_ahead=larg;
1063                 return(l);
1064
1065         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1066                 s->msg_callback_arg = parg;
1067                 return 1;
1068
1069         case SSL_CTRL_OPTIONS:
1070                 return(s->options|=larg);
1071         case SSL_CTRL_CLEAR_OPTIONS:
1072                 return(s->options&=~larg);
1073         case SSL_CTRL_MODE:
1074                 return(s->mode|=larg);
1075         case SSL_CTRL_CLEAR_MODE:
1076                 return(s->mode &=~larg);
1077         case SSL_CTRL_GET_MAX_CERT_LIST:
1078                 return(s->max_cert_list);
1079         case SSL_CTRL_SET_MAX_CERT_LIST:
1080                 l=s->max_cert_list;
1081                 s->max_cert_list=larg;
1082                 return(l);
1083         case SSL_CTRL_SET_MTU:
1084 #ifndef OPENSSL_NO_DTLS1
1085                 if (larg < (long)dtls1_min_mtu())
1086                         return 0;
1087 #endif
1088
1089                 if (SSL_version(s) == DTLS1_VERSION ||
1090                     SSL_version(s) == DTLS1_BAD_VER)
1091                         {
1092                         s->d1->mtu = larg;
1093                         return larg;
1094                         }
1095                 return 0;
1096         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1097                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1098                         return 0;
1099                 s->max_send_fragment = larg;
1100                 return 1;
1101         case SSL_CTRL_GET_RI_SUPPORT:
1102                 if (s->s3)
1103                         return s->s3->send_connection_binding;
1104                 else return 0;
1105         default:
1106                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1107                 }
1108         }
1109
1110 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1111         {
1112         switch(cmd)
1113                 {
1114         case SSL_CTRL_SET_MSG_CALLBACK:
1115                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1116                 return 1;
1117                 
1118         default:
1119                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1120                 }
1121         }
1122
1123 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1124         {
1125         return ctx->sessions;
1126         }
1127
1128 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1129         {
1130         long l;
1131
1132         switch (cmd)
1133                 {
1134         case SSL_CTRL_GET_READ_AHEAD:
1135                 return(ctx->read_ahead);
1136         case SSL_CTRL_SET_READ_AHEAD:
1137                 l=ctx->read_ahead;
1138                 ctx->read_ahead=larg;
1139                 return(l);
1140                 
1141         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1142                 ctx->msg_callback_arg = parg;
1143                 return 1;
1144
1145         case SSL_CTRL_GET_MAX_CERT_LIST:
1146                 return(ctx->max_cert_list);
1147         case SSL_CTRL_SET_MAX_CERT_LIST:
1148                 l=ctx->max_cert_list;
1149                 ctx->max_cert_list=larg;
1150                 return(l);
1151
1152         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1153                 l=ctx->session_cache_size;
1154                 ctx->session_cache_size=larg;
1155                 return(l);
1156         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1157                 return(ctx->session_cache_size);
1158         case SSL_CTRL_SET_SESS_CACHE_MODE:
1159                 l=ctx->session_cache_mode;
1160                 ctx->session_cache_mode=larg;
1161                 return(l);
1162         case SSL_CTRL_GET_SESS_CACHE_MODE:
1163                 return(ctx->session_cache_mode);
1164
1165         case SSL_CTRL_SESS_NUMBER:
1166                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1167         case SSL_CTRL_SESS_CONNECT:
1168                 return(ctx->stats.sess_connect);
1169         case SSL_CTRL_SESS_CONNECT_GOOD:
1170                 return(ctx->stats.sess_connect_good);
1171         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1172                 return(ctx->stats.sess_connect_renegotiate);
1173         case SSL_CTRL_SESS_ACCEPT:
1174                 return(ctx->stats.sess_accept);
1175         case SSL_CTRL_SESS_ACCEPT_GOOD:
1176                 return(ctx->stats.sess_accept_good);
1177         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1178                 return(ctx->stats.sess_accept_renegotiate);
1179         case SSL_CTRL_SESS_HIT:
1180                 return(ctx->stats.sess_hit);
1181         case SSL_CTRL_SESS_CB_HIT:
1182                 return(ctx->stats.sess_cb_hit);
1183         case SSL_CTRL_SESS_MISSES:
1184                 return(ctx->stats.sess_miss);
1185         case SSL_CTRL_SESS_TIMEOUTS:
1186                 return(ctx->stats.sess_timeout);
1187         case SSL_CTRL_SESS_CACHE_FULL:
1188                 return(ctx->stats.sess_cache_full);
1189         case SSL_CTRL_OPTIONS:
1190                 return(ctx->options|=larg);
1191         case SSL_CTRL_CLEAR_OPTIONS:
1192                 return(ctx->options&=~larg);
1193         case SSL_CTRL_MODE:
1194                 return(ctx->mode|=larg);
1195         case SSL_CTRL_CLEAR_MODE:
1196                 return(ctx->mode&=~larg);
1197         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1198                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1199                         return 0;
1200                 ctx->max_send_fragment = larg;
1201                 return 1;
1202         default:
1203                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1204                 }
1205         }
1206
1207 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1208         {
1209         switch(cmd)
1210                 {
1211         case SSL_CTRL_SET_MSG_CALLBACK:
1212                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1213                 return 1;
1214
1215         default:
1216                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1217                 }
1218         }
1219
1220 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1221         {
1222         long l;
1223
1224         l=a->id-b->id;
1225         if (l == 0L)
1226                 return(0);
1227         else
1228                 return((l > 0)?1:-1);
1229         }
1230
1231 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1232                         const SSL_CIPHER * const *bp)
1233         {
1234         long l;
1235
1236         l=(*ap)->id-(*bp)->id;
1237         if (l == 0L)
1238                 return(0);
1239         else
1240                 return((l > 0)?1:-1);
1241         }
1242
1243 /** return a STACK of the ciphers available for the SSL and in order of
1244  * preference */
1245 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1246         {
1247         if (s != NULL)
1248                 {
1249                 if (s->cipher_list != NULL)
1250                         {
1251                         return(s->cipher_list);
1252                         }
1253                 else if ((s->ctx != NULL) &&
1254                         (s->ctx->cipher_list != NULL))
1255                         {
1256                         return(s->ctx->cipher_list);
1257                         }
1258                 }
1259         return(NULL);
1260         }
1261
1262 /** return a STACK of the ciphers available for the SSL and in order of
1263  * algorithm id */
1264 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1265         {
1266         if (s != NULL)
1267                 {
1268                 if (s->cipher_list_by_id != NULL)
1269                         {
1270                         return(s->cipher_list_by_id);
1271                         }
1272                 else if ((s->ctx != NULL) &&
1273                         (s->ctx->cipher_list_by_id != NULL))
1274                         {
1275                         return(s->ctx->cipher_list_by_id);
1276                         }
1277                 }
1278         return(NULL);
1279         }
1280
1281 /** The old interface to get the same thing as SSL_get_ciphers() */
1282 const char *SSL_get_cipher_list(const SSL *s,int n)
1283         {
1284         SSL_CIPHER *c;
1285         STACK_OF(SSL_CIPHER) *sk;
1286
1287         if (s == NULL) return(NULL);
1288         sk=SSL_get_ciphers(s);
1289         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1290                 return(NULL);
1291         c=sk_SSL_CIPHER_value(sk,n);
1292         if (c == NULL) return(NULL);
1293         return(c->name);
1294         }
1295
1296 /** specify the ciphers to be used by default by the SSL_CTX */
1297 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1298         {
1299         STACK_OF(SSL_CIPHER) *sk;
1300         
1301         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1302                 &ctx->cipher_list_by_id,str);
1303         /* ssl_create_cipher_list may return an empty stack if it
1304          * was unable to find a cipher matching the given rule string
1305          * (for example if the rule string specifies a cipher which
1306          * has been disabled). This is not an error as far as
1307          * ssl_create_cipher_list is concerned, and hence
1308          * ctx->cipher_list and ctx->cipher_list_by_id has been
1309          * updated. */
1310         if (sk == NULL)
1311                 return 0;
1312         else if (sk_SSL_CIPHER_num(sk) == 0)
1313                 {
1314                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1315                 return 0;
1316                 }
1317         return 1;
1318         }
1319
1320 /** specify the ciphers to be used by the SSL */
1321 int SSL_set_cipher_list(SSL *s,const char *str)
1322         {
1323         STACK_OF(SSL_CIPHER) *sk;
1324         
1325         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1326                 &s->cipher_list_by_id,str);
1327         /* see comment in SSL_CTX_set_cipher_list */
1328         if (sk == NULL)
1329                 return 0;
1330         else if (sk_SSL_CIPHER_num(sk) == 0)
1331                 {
1332                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1333                 return 0;
1334                 }
1335         return 1;
1336         }
1337
1338 /* works well for SSLv2, not so good for SSLv3 */
1339 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1340         {
1341         char *p;
1342         STACK_OF(SSL_CIPHER) *sk;
1343         SSL_CIPHER *c;
1344         int i;
1345
1346         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1347                 (len < 2))
1348                 return(NULL);
1349
1350         p=buf;
1351         sk=s->session->ciphers;
1352         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1353                 {
1354                 int n;
1355
1356                 c=sk_SSL_CIPHER_value(sk,i);
1357                 n=strlen(c->name);
1358                 if (n+1 > len)
1359                         {
1360                         if (p != buf)
1361                                 --p;
1362                         *p='\0';
1363                         return buf;
1364                         }
1365                 strcpy(p,c->name);
1366                 p+=n;
1367                 *(p++)=':';
1368                 len-=n+1;
1369                 }
1370         p[-1]='\0';
1371         return(buf);
1372         }
1373
1374 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1375                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1376         {
1377         int i,j=0;
1378         SSL_CIPHER *c;
1379         unsigned char *q;
1380 #ifndef OPENSSL_NO_KRB5
1381         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1382 #endif /* OPENSSL_NO_KRB5 */
1383
1384         if (sk == NULL) return(0);
1385         q=p;
1386
1387         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1388                 {
1389                 c=sk_SSL_CIPHER_value(sk,i);
1390                 /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
1391                 if ((c->algorithm_ssl & SSL_TLSV1_2) && 
1392                         (TLS1_get_client_version(s) < TLS1_2_VERSION))
1393                         continue;
1394 #ifndef OPENSSL_NO_KRB5
1395                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1396                     nokrb5)
1397                     continue;
1398 #endif /* OPENSSL_NO_KRB5 */
1399 #ifndef OPENSSL_NO_PSK
1400                 /* with PSK there must be client callback set */
1401                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1402                     s->psk_client_callback == NULL)
1403                         continue;
1404 #endif /* OPENSSL_NO_PSK */
1405                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1406                 p+=j;
1407                 }
1408         /* If p == q, no ciphers and caller indicates an error. Otherwise
1409          * add SCSV if not renegotiating.
1410          */
1411         if (p != q && !s->renegotiate)
1412                 {
1413                 static SSL_CIPHER scsv =
1414                         {
1415                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1416                         };
1417                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1418                 p+=j;
1419 #ifdef OPENSSL_RI_DEBUG
1420                 fprintf(stderr, "SCSV sent by client\n");
1421 #endif
1422                 }
1423
1424         return(p-q);
1425         }
1426
1427 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1428                                                STACK_OF(SSL_CIPHER) **skp)
1429         {
1430         const SSL_CIPHER *c;
1431         STACK_OF(SSL_CIPHER) *sk;
1432         int i,n;
1433         if (s->s3)
1434                 s->s3->send_connection_binding = 0;
1435
1436         n=ssl_put_cipher_by_char(s,NULL,NULL);
1437         if ((num%n) != 0)
1438                 {
1439                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1440                 return(NULL);
1441                 }
1442         if ((skp == NULL) || (*skp == NULL))
1443                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1444         else
1445                 {
1446                 sk= *skp;
1447                 sk_SSL_CIPHER_zero(sk);
1448                 }
1449
1450         for (i=0; i<num; i+=n)
1451                 {
1452                 /* Check for SCSV */
1453                 if (s->s3 && (n != 3 || !p[0]) &&
1454                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1455                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1456                         {
1457                         /* SCSV fatal if renegotiating */
1458                         if (s->renegotiate)
1459                                 {
1460                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1461                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
1462                                 goto err;
1463                                 }
1464                         s->s3->send_connection_binding = 1;
1465                         p += n;
1466 #ifdef OPENSSL_RI_DEBUG
1467                         fprintf(stderr, "SCSV received by server\n");
1468 #endif
1469                         continue;
1470                         }
1471
1472                 c=ssl_get_cipher_by_char(s,p);
1473                 p+=n;
1474                 if (c != NULL)
1475                         {
1476                         if (!sk_SSL_CIPHER_push(sk,c))
1477                                 {
1478                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1479                                 goto err;
1480                                 }
1481                         }
1482                 }
1483
1484         if (skp != NULL)
1485                 *skp=sk;
1486         return(sk);
1487 err:
1488         if ((skp == NULL) || (*skp == NULL))
1489                 sk_SSL_CIPHER_free(sk);
1490         return(NULL);
1491         }
1492
1493
1494 #ifndef OPENSSL_NO_TLSEXT
1495 /** return a servername extension value if provided in Client Hello, or NULL.
1496  * So far, only host_name types are defined (RFC 3546).
1497  */
1498
1499 const char *SSL_get_servername(const SSL *s, const int type)
1500         {
1501         if (type != TLSEXT_NAMETYPE_host_name)
1502                 return NULL;
1503
1504         return s->session && !s->tlsext_hostname ?
1505                 s->session->tlsext_hostname :
1506                 s->tlsext_hostname;
1507         }
1508
1509 int SSL_get_servername_type(const SSL *s)
1510         {
1511         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1512                 return TLSEXT_NAMETYPE_host_name;
1513         return -1;
1514         }
1515
1516 # ifndef OPENSSL_NO_NEXTPROTONEG
1517 /* SSL_select_next_proto implements the standard protocol selection. It is
1518  * expected that this function is called from the callback set by
1519  * SSL_CTX_set_next_proto_select_cb.
1520  *
1521  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1522  * strings. The length byte itself is not included in the length. A byte
1523  * string of length 0 is invalid. No byte string may be truncated.
1524  *
1525  * The current, but experimental algorithm for selecting the protocol is:
1526  *
1527  * 1) If the server doesn't support NPN then this is indicated to the
1528  * callback. In this case, the client application has to abort the connection
1529  * or have a default application level protocol.
1530  *
1531  * 2) If the server supports NPN, but advertises an empty list then the
1532  * client selects the first protcol in its list, but indicates via the
1533  * API that this fallback case was enacted.
1534  *
1535  * 3) Otherwise, the client finds the first protocol in the server's list
1536  * that it supports and selects this protocol. This is because it's
1537  * assumed that the server has better information about which protocol
1538  * a client should use.
1539  *
1540  * 4) If the client doesn't support any of the server's advertised
1541  * protocols, then this is treated the same as case 2.
1542  *
1543  * It returns either
1544  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1545  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1546  */
1547 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)
1548         {
1549         unsigned int i, j;
1550         const unsigned char *result;
1551         int status = OPENSSL_NPN_UNSUPPORTED;
1552
1553         /* For each protocol in server preference order, see if we support it. */
1554         for (i = 0; i < server_len; )
1555                 {
1556                 for (j = 0; j < client_len; )
1557                         {
1558                         if (server[i] == client[j] &&
1559                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1560                                 {
1561                                 /* We found a match */
1562                                 result = &server[i];
1563                                 status = OPENSSL_NPN_NEGOTIATED;
1564                                 goto found;
1565                                 }
1566                         j += client[j];
1567                         j++;
1568                         }
1569                 i += server[i];
1570                 i++;
1571                 }
1572
1573         /* There's no overlap between our protocols and the server's list. */
1574         result = client;
1575         status = OPENSSL_NPN_NO_OVERLAP;
1576
1577         found:
1578         *out = (unsigned char *) result + 1;
1579         *outlen = result[0];
1580         return status;
1581         }
1582
1583 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1584  * requested protocol for this connection and returns 0. If the client didn't
1585  * request any protocol, then *data is set to NULL.
1586  *
1587  * Note that the client can request any protocol it chooses. The value returned
1588  * from this function need not be a member of the list of supported protocols
1589  * provided by the callback.
1590  */
1591 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1592         {
1593         *data = s->next_proto_negotiated;
1594         if (!*data) {
1595                 *len = 0;
1596         } else {
1597                 *len = s->next_proto_negotiated_len;
1598         }
1599 }
1600
1601 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1602  * TLS server needs a list of supported protocols for Next Protocol
1603  * Negotiation. The returned list must be in wire format.  The list is returned
1604  * by setting |out| to point to it and |outlen| to its length. This memory will
1605  * not be modified, but one should assume that the SSL* keeps a reference to
1606  * it.
1607  *
1608  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1609  * such extension will be included in the ServerHello. */
1610 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)
1611         {
1612         ctx->next_protos_advertised_cb = cb;
1613         ctx->next_protos_advertised_cb_arg = arg;
1614         }
1615
1616 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1617  * client needs to select a protocol from the server's provided list. |out|
1618  * must be set to point to the selected protocol (which may be within |in|).
1619  * The length of the protocol name must be written into |outlen|. The server's
1620  * advertised protocols are provided in |in| and |inlen|. The callback can
1621  * assume that |in| is syntactically valid.
1622  *
1623  * The client must select a protocol. It is fatal to the connection if this
1624  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1625  */
1626 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)
1627         {
1628         ctx->next_proto_select_cb = cb;
1629         ctx->next_proto_select_cb_arg = arg;
1630         }
1631
1632 # endif
1633 #endif
1634
1635 int SSL_export_keying_material(SSL *s, unsigned char *out, int olen, 
1636         char *label, int llen, unsigned char *p, int plen, int use_context)
1637         {
1638         if (s->version < TLS1_VERSION)
1639                 return -1;
1640
1641         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1642                                                            llen, p, plen,
1643                                                            use_context);
1644         }
1645
1646 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1647         {
1648         unsigned long l;
1649
1650         l=(unsigned long)
1651                 ((unsigned int) a->session_id[0]     )|
1652                 ((unsigned int) a->session_id[1]<< 8L)|
1653                 ((unsigned long)a->session_id[2]<<16L)|
1654                 ((unsigned long)a->session_id[3]<<24L);
1655         return(l);
1656         }
1657
1658 /* NB: If this function (or indeed the hash function which uses a sort of
1659  * coarser function than this one) is changed, ensure
1660  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1661  * able to construct an SSL_SESSION that will collide with any existing session
1662  * with a matching session ID. */
1663 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1664         {
1665         if (a->ssl_version != b->ssl_version)
1666                 return(1);
1667         if (a->session_id_length != b->session_id_length)
1668                 return(1);
1669         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1670         }
1671
1672 /* These wrapper functions should remain rather than redeclaring
1673  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1674  * variable. The reason is that the functions aren't static, they're exposed via
1675  * ssl.h. */
1676 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1677 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1678
1679 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1680         {
1681         SSL_CTX *ret=NULL;
1682
1683         if (meth == NULL)
1684                 {
1685                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1686                 return(NULL);
1687                 }
1688
1689 #ifdef OPENSSL_FIPS
1690         if (FIPS_mode() && (meth->version < TLS1_VERSION))      
1691                 {
1692                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1693                 return NULL;
1694                 }
1695 #endif
1696
1697         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1698                 {
1699                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1700                 goto err;
1701                 }
1702         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1703         if (ret == NULL)
1704                 goto err;
1705
1706         memset(ret,0,sizeof(SSL_CTX));
1707
1708         ret->method=meth;
1709
1710         ret->cert_store=NULL;
1711         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1712         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1713         ret->session_cache_head=NULL;
1714         ret->session_cache_tail=NULL;
1715
1716         /* We take the system default */
1717         ret->session_timeout=meth->get_timeout();
1718
1719         ret->new_session_cb=0;
1720         ret->remove_session_cb=0;
1721         ret->get_session_cb=0;
1722         ret->generate_session_id=0;
1723
1724         memset((char *)&ret->stats,0,sizeof(ret->stats));
1725
1726         ret->references=1;
1727         ret->quiet_shutdown=0;
1728
1729 /*      ret->cipher=NULL;*/
1730 /*      ret->s2->challenge=NULL;
1731         ret->master_key=NULL;
1732         ret->key_arg=NULL;
1733         ret->s2->conn_id=NULL; */
1734
1735         ret->info_callback=NULL;
1736
1737         ret->app_verify_callback=0;
1738         ret->app_verify_arg=NULL;
1739
1740         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1741         ret->read_ahead=0;
1742         ret->msg_callback=0;
1743         ret->msg_callback_arg=NULL;
1744         ret->verify_mode=SSL_VERIFY_NONE;
1745 #if 0
1746         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1747 #endif
1748         ret->sid_ctx_length=0;
1749         ret->default_verify_callback=NULL;
1750         if ((ret->cert=ssl_cert_new()) == NULL)
1751                 goto err;
1752
1753         ret->default_passwd_callback=0;
1754         ret->default_passwd_callback_userdata=NULL;
1755         ret->client_cert_cb=0;
1756         ret->app_gen_cookie_cb=0;
1757         ret->app_verify_cookie_cb=0;
1758
1759         ret->sessions=lh_SSL_SESSION_new();
1760         if (ret->sessions == NULL) goto err;
1761         ret->cert_store=X509_STORE_new();
1762         if (ret->cert_store == NULL) goto err;
1763
1764         ssl_create_cipher_list(ret->method,
1765                 &ret->cipher_list,&ret->cipher_list_by_id,
1766                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1767         if (ret->cipher_list == NULL
1768             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1769                 {
1770                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1771                 goto err2;
1772                 }
1773
1774         ret->param = X509_VERIFY_PARAM_new();
1775         if (!ret->param)
1776                 goto err;
1777
1778         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1779                 {
1780                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1781                 goto err2;
1782                 }
1783         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1784                 {
1785                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1786                 goto err2;
1787                 }
1788         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1789                 {
1790                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1791                 goto err2;
1792                 }
1793
1794         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1795                 goto err;
1796
1797         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1798
1799         ret->extra_certs=NULL;
1800         ret->comp_methods=SSL_COMP_get_compression_methods();
1801
1802         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1803
1804 #ifndef OPENSSL_NO_TLSEXT
1805         ret->tlsext_servername_callback = 0;
1806         ret->tlsext_servername_arg = NULL;
1807         /* Setup RFC4507 ticket keys */
1808         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1809                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1810                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1811                 ret->options |= SSL_OP_NO_TICKET;
1812
1813         ret->tlsext_status_cb = 0;
1814         ret->tlsext_status_arg = NULL;
1815
1816 # ifndef OPENSSL_NO_NEXTPROTONEG
1817         ret->next_protos_advertised_cb = 0;
1818         ret->next_proto_select_cb = 0;
1819 # endif
1820 #endif
1821 #ifndef OPENSSL_NO_PSK
1822         ret->psk_identity_hint=NULL;
1823         ret->psk_client_callback=NULL;
1824         ret->psk_server_callback=NULL;
1825 #endif
1826 #ifndef OPENSSL_NO_SRP
1827         SSL_CTX_SRP_CTX_init(ret);
1828 #endif
1829 #ifndef OPENSSL_NO_BUF_FREELISTS
1830         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1831         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1832         if (!ret->rbuf_freelist)
1833                 goto err;
1834         ret->rbuf_freelist->chunklen = 0;
1835         ret->rbuf_freelist->len = 0;
1836         ret->rbuf_freelist->head = NULL;
1837         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1838         if (!ret->wbuf_freelist)
1839                 {
1840                 OPENSSL_free(ret->rbuf_freelist);
1841                 goto err;
1842                 }
1843         ret->wbuf_freelist->chunklen = 0;
1844         ret->wbuf_freelist->len = 0;
1845         ret->wbuf_freelist->head = NULL;
1846 #endif
1847 #ifndef OPENSSL_NO_ENGINE
1848         ret->client_cert_engine = NULL;
1849 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1850 #define eng_strx(x)     #x
1851 #define eng_str(x)      eng_strx(x)
1852         /* Use specific client engine automatically... ignore errors */
1853         {
1854         ENGINE *eng;
1855         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1856         if (!eng)
1857                 {
1858                 ERR_clear_error();
1859                 ENGINE_load_builtin_engines();
1860                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1861                 }
1862         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1863                 ERR_clear_error();
1864         }
1865 #endif
1866 #endif
1867         /* Default is to connect to non-RI servers. When RI is more widely
1868          * deployed might change this.
1869          */
1870         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
1871
1872         return(ret);
1873 err:
1874         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1875 err2:
1876         if (ret != NULL) SSL_CTX_free(ret);
1877         return(NULL);
1878         }
1879
1880 #if 0
1881 static void SSL_COMP_free(SSL_COMP *comp)
1882     { OPENSSL_free(comp); }
1883 #endif
1884
1885 #ifndef OPENSSL_NO_BUF_FREELISTS
1886 static void
1887 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1888         {
1889         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1890         for (ent = list->head; ent; ent = next)
1891                 {
1892                 next = ent->next;
1893                 OPENSSL_free(ent);
1894                 }
1895         OPENSSL_free(list);
1896         }
1897 #endif
1898
1899 void SSL_CTX_free(SSL_CTX *a)
1900         {
1901         int i;
1902
1903         if (a == NULL) return;
1904
1905         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1906 #ifdef REF_PRINT
1907         REF_PRINT("SSL_CTX",a);
1908 #endif
1909         if (i > 0) return;
1910 #ifdef REF_CHECK
1911         if (i < 0)
1912                 {
1913                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1914                 abort(); /* ok */
1915                 }
1916 #endif
1917
1918         if (a->param)
1919                 X509_VERIFY_PARAM_free(a->param);
1920
1921         /*
1922          * Free internal session cache. However: the remove_cb() may reference
1923          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1924          * after the sessions were flushed.
1925          * As the ex_data handling routines might also touch the session cache,
1926          * the most secure solution seems to be: empty (flush) the cache, then
1927          * free ex_data, then finally free the cache.
1928          * (See ticket [openssl.org #212].)
1929          */
1930         if (a->sessions != NULL)
1931                 SSL_CTX_flush_sessions(a,0);
1932
1933         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1934
1935         if (a->sessions != NULL)
1936                 lh_SSL_SESSION_free(a->sessions);
1937
1938         if (a->cert_store != NULL)
1939                 X509_STORE_free(a->cert_store);
1940         if (a->cipher_list != NULL)
1941                 sk_SSL_CIPHER_free(a->cipher_list);
1942         if (a->cipher_list_by_id != NULL)
1943                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1944         if (a->cert != NULL)
1945                 ssl_cert_free(a->cert);
1946         if (a->client_CA != NULL)
1947                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1948         if (a->extra_certs != NULL)
1949                 sk_X509_pop_free(a->extra_certs,X509_free);
1950 #if 0 /* This should never be done, since it removes a global database */
1951         if (a->comp_methods != NULL)
1952                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1953 #else
1954         a->comp_methods = NULL;
1955 #endif
1956
1957         if (a->srtp_profiles)
1958                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
1959
1960 #ifndef OPENSSL_NO_PSK
1961         if (a->psk_identity_hint)
1962                 OPENSSL_free(a->psk_identity_hint);
1963 #endif
1964 #ifndef OPENSSL_NO_SRP
1965         SSL_CTX_SRP_CTX_free(a);
1966 #endif
1967 #ifndef OPENSSL_NO_ENGINE
1968         if (a->client_cert_engine)
1969                 ENGINE_finish(a->client_cert_engine);
1970 #endif
1971
1972 #ifndef OPENSSL_NO_BUF_FREELISTS
1973         if (a->wbuf_freelist)
1974                 ssl_buf_freelist_free(a->wbuf_freelist);
1975         if (a->rbuf_freelist)
1976                 ssl_buf_freelist_free(a->rbuf_freelist);
1977 #endif
1978
1979         OPENSSL_free(a);
1980         }
1981
1982 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1983         {
1984         ctx->default_passwd_callback=cb;
1985         }
1986
1987 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1988         {
1989         ctx->default_passwd_callback_userdata=u;
1990         }
1991
1992 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1993         {
1994         ctx->app_verify_callback=cb;
1995         ctx->app_verify_arg=arg;
1996         }
1997
1998 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1999         {
2000         ctx->verify_mode=mode;
2001         ctx->default_verify_callback=cb;
2002         }
2003
2004 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2005         {
2006         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2007         }
2008
2009 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2010         {
2011         CERT_PKEY *cpk;
2012         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2013         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2014         int rsa_tmp_export,dh_tmp_export,kl;
2015         unsigned long mask_k,mask_a,emask_k,emask_a;
2016         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
2017 #ifndef OPENSSL_NO_ECDH
2018         int have_ecdh_tmp;
2019 #endif
2020         X509 *x = NULL;
2021         EVP_PKEY *ecc_pkey = NULL;
2022         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2023
2024         if (c == NULL) return;
2025
2026         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2027
2028 #ifndef OPENSSL_NO_RSA
2029         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2030         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2031                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2032 #else
2033         rsa_tmp=rsa_tmp_export=0;
2034 #endif
2035 #ifndef OPENSSL_NO_DH
2036         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2037         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2038                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2039 #else
2040         dh_tmp=dh_tmp_export=0;
2041 #endif
2042
2043 #ifndef OPENSSL_NO_ECDH
2044         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
2045 #endif
2046         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2047         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
2048         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2049         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2050         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2051         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2052         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
2053         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2054         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2055         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2056         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2057 /* FIX THIS EAY EAY EAY */
2058         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
2059         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2060         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2061         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
2062         mask_k=0;
2063         mask_a=0;
2064         emask_k=0;
2065         emask_a=0;
2066
2067         
2068
2069 #ifdef CIPHER_DEBUG
2070         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2071                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2072                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2073 #endif
2074         
2075         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2076         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2077                 mask_k |= SSL_kGOST;
2078                 mask_a |= SSL_aGOST01;
2079         }
2080         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2081         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2082                 mask_k |= SSL_kGOST;
2083                 mask_a |= SSL_aGOST94;
2084         }
2085
2086         if (rsa_enc || (rsa_tmp && rsa_sign))
2087                 mask_k|=SSL_kRSA;
2088         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2089                 emask_k|=SSL_kRSA;
2090
2091 #if 0
2092         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
2093         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2094                 (rsa_enc || rsa_sign || dsa_sign))
2095                 mask_k|=SSL_kEDH;
2096         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2097                 (rsa_enc || rsa_sign || dsa_sign))
2098                 emask_k|=SSL_kEDH;
2099 #endif
2100
2101         if (dh_tmp_export)
2102                 emask_k|=SSL_kEDH;
2103
2104         if (dh_tmp)
2105                 mask_k|=SSL_kEDH;
2106
2107         if (dh_rsa) mask_k|=SSL_kDHr;
2108         if (dh_rsa_export) emask_k|=SSL_kDHr;
2109
2110         if (dh_dsa) mask_k|=SSL_kDHd;
2111         if (dh_dsa_export) emask_k|=SSL_kDHd;
2112
2113         if (emask_k & (SSL_kDHr|SSL_kDHd))
2114                 mask_a |= SSL_aDH;
2115
2116         if (rsa_enc || rsa_sign)
2117                 {
2118                 mask_a|=SSL_aRSA;
2119                 emask_a|=SSL_aRSA;
2120                 }
2121
2122         if (dsa_sign)
2123                 {
2124                 mask_a|=SSL_aDSS;
2125                 emask_a|=SSL_aDSS;
2126                 }
2127
2128         mask_a|=SSL_aNULL;
2129         emask_a|=SSL_aNULL;
2130
2131 #ifndef OPENSSL_NO_KRB5
2132         mask_k|=SSL_kKRB5;
2133         mask_a|=SSL_aKRB5;
2134         emask_k|=SSL_kKRB5;
2135         emask_a|=SSL_aKRB5;
2136 #endif
2137
2138         /* An ECC certificate may be usable for ECDH and/or
2139          * ECDSA cipher suites depending on the key usage extension.
2140          */
2141         if (have_ecc_cert)
2142                 {
2143                 /* This call populates extension flags (ex_flags) */
2144                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
2145                 X509_check_purpose(x, -1, 0);
2146                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2147                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2148                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2149                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2150                 ecc_pkey = X509_get_pubkey(x);
2151                 ecc_pkey_size = (ecc_pkey != NULL) ?
2152                     EVP_PKEY_bits(ecc_pkey) : 0;
2153                 EVP_PKEY_free(ecc_pkey);
2154                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2155                         {
2156                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2157                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2158                         }
2159 #ifndef OPENSSL_NO_ECDH
2160                 if (ecdh_ok)
2161                         {
2162
2163                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2164                                 {
2165                                 mask_k|=SSL_kECDHr;
2166                                 mask_a|=SSL_aECDH;
2167                                 if (ecc_pkey_size <= 163)
2168                                         {
2169                                         emask_k|=SSL_kECDHr;
2170                                         emask_a|=SSL_aECDH;
2171                                         }
2172                                 }
2173
2174                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2175                                 {
2176                                 mask_k|=SSL_kECDHe;
2177                                 mask_a|=SSL_aECDH;
2178                                 if (ecc_pkey_size <= 163)
2179                                         {
2180                                         emask_k|=SSL_kECDHe;
2181                                         emask_a|=SSL_aECDH;
2182                                         }
2183                                 }
2184                         }
2185 #endif
2186 #ifndef OPENSSL_NO_ECDSA
2187                 if (ecdsa_ok)
2188                         {
2189                         mask_a|=SSL_aECDSA;
2190                         emask_a|=SSL_aECDSA;
2191                         }
2192 #endif
2193                 }
2194
2195 #ifndef OPENSSL_NO_ECDH
2196         if (have_ecdh_tmp)
2197                 {
2198                 mask_k|=SSL_kEECDH;
2199                 emask_k|=SSL_kEECDH;
2200                 }
2201 #endif
2202
2203 #ifndef OPENSSL_NO_PSK
2204         mask_k |= SSL_kPSK;
2205         mask_a |= SSL_aPSK;
2206         emask_k |= SSL_kPSK;
2207         emask_a |= SSL_aPSK;
2208 #endif
2209
2210         c->mask_k=mask_k;
2211         c->mask_a=mask_a;
2212         c->export_mask_k=emask_k;
2213         c->export_mask_a=emask_a;
2214         c->valid=1;
2215         }
2216
2217 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2218 #define ku_reject(x, usage) \
2219         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2220
2221 #ifndef OPENSSL_NO_EC
2222
2223 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2224         {
2225         unsigned long alg_k, alg_a;
2226         EVP_PKEY *pkey = NULL;
2227         int keysize = 0;
2228         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2229         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2230
2231         alg_k = cs->algorithm_mkey;
2232         alg_a = cs->algorithm_auth;
2233
2234         if (SSL_C_IS_EXPORT(cs))
2235                 {
2236                 /* ECDH key length in export ciphers must be <= 163 bits */
2237                 pkey = X509_get_pubkey(x);
2238                 if (pkey == NULL) return 0;
2239                 keysize = EVP_PKEY_bits(pkey);
2240                 EVP_PKEY_free(pkey);
2241                 if (keysize > 163) return 0;
2242                 }
2243
2244         /* This call populates the ex_flags field correctly */
2245         X509_check_purpose(x, -1, 0);
2246         if ((x->sig_alg) && (x->sig_alg->algorithm))
2247                 {
2248                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2249                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2250                 }
2251         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2252                 {
2253                 /* key usage, if present, must allow key agreement */
2254                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2255                         {
2256                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2257                         return 0;
2258                         }
2259                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2260                         {
2261                         /* signature alg must be ECDSA */
2262                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2263                                 {
2264                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2265                                 return 0;
2266                                 }
2267                         }
2268                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2269                         {
2270                         /* signature alg must be RSA */
2271
2272                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2273                                 {
2274                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2275                                 return 0;
2276                                 }
2277                         }
2278                 }
2279         if (alg_a & SSL_aECDSA)
2280                 {
2281                 /* key usage, if present, must allow signing */
2282                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2283                         {
2284                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2285                         return 0;
2286                         }
2287                 }
2288
2289         return 1;  /* all checks are ok */
2290         }
2291
2292 #endif
2293
2294 /* THIS NEEDS CLEANING UP */
2295 CERT_PKEY *ssl_get_server_send_pkey(SSL *s)
2296         {
2297         unsigned long alg_k,alg_a;
2298         CERT *c;
2299         int i;
2300
2301         c=s->cert;
2302         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2303         
2304         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2305         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2306
2307         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2308                 {
2309                 /* we don't need to look at SSL_kEECDH
2310                  * since no certificate is needed for
2311                  * anon ECDH and for authenticated
2312                  * EECDH, the check for the auth
2313                  * algorithm will set i correctly
2314                  * NOTE: For ECDH-RSA, we need an ECC
2315                  * not an RSA cert but for EECDH-RSA
2316                  * we need an RSA cert. Placing the
2317                  * checks for SSL_kECDH before RSA
2318                  * checks ensures the correct cert is chosen.
2319                  */
2320                 i=SSL_PKEY_ECC;
2321                 }
2322         else if (alg_a & SSL_aECDSA)
2323                 {
2324                 i=SSL_PKEY_ECC;
2325                 }
2326         else if (alg_k & SSL_kDHr)
2327                 i=SSL_PKEY_DH_RSA;
2328         else if (alg_k & SSL_kDHd)
2329                 i=SSL_PKEY_DH_DSA;
2330         else if (alg_a & SSL_aDSS)
2331                 i=SSL_PKEY_DSA_SIGN;
2332         else if (alg_a & SSL_aRSA)
2333                 {
2334                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2335                         i=SSL_PKEY_RSA_SIGN;
2336                 else
2337                         i=SSL_PKEY_RSA_ENC;
2338                 }
2339         else if (alg_a & SSL_aKRB5)
2340                 {
2341                 /* VRS something else here? */
2342                 return(NULL);
2343                 }
2344         else if (alg_a & SSL_aGOST94) 
2345                 i=SSL_PKEY_GOST94;
2346         else if (alg_a & SSL_aGOST01)
2347                 i=SSL_PKEY_GOST01;
2348         else /* if (alg_a & SSL_aNULL) */
2349                 {
2350                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2351                 return(NULL);
2352                 }
2353         if (c->pkeys[i].x509 == NULL) return(NULL);
2354
2355         return(&c->pkeys[i]);
2356         }
2357
2358 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2359         {
2360         unsigned long alg_a;
2361         CERT *c;
2362         int idx = -1;
2363
2364         alg_a = cipher->algorithm_auth;
2365         c=s->cert;
2366
2367         if ((alg_a & SSL_aDSS) &&
2368                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2369                 idx = SSL_PKEY_DSA_SIGN;
2370         else if (alg_a & SSL_aRSA)
2371                 {
2372                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2373                         idx = SSL_PKEY_RSA_SIGN;
2374                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2375                         idx = SSL_PKEY_RSA_ENC;
2376                 }
2377         else if ((alg_a & SSL_aECDSA) &&
2378                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2379                 idx = SSL_PKEY_ECC;
2380         if (idx == -1)
2381                 {
2382                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2383                 return(NULL);
2384                 }
2385         if (pmd)
2386                 *pmd = c->pkeys[idx].digest;
2387         return c->pkeys[idx].privatekey;
2388         }
2389
2390 void ssl_update_cache(SSL *s,int mode)
2391         {
2392         int i;
2393
2394         /* If the session_id_length is 0, we are not supposed to cache it,
2395          * and it would be rather hard to do anyway :-) */
2396         if (s->session->session_id_length == 0) return;
2397
2398         i=s->session_ctx->session_cache_mode;
2399         if ((i & mode) && (!s->hit)
2400                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2401                     || SSL_CTX_add_session(s->session_ctx,s->session))
2402                 && (s->session_ctx->new_session_cb != NULL))
2403                 {
2404                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2405                 if (!s->session_ctx->new_session_cb(s,s->session))
2406                         SSL_SESSION_free(s->session);
2407                 }
2408
2409         /* auto flush every 255 connections */
2410         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2411                 ((i & mode) == mode))
2412                 {
2413                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2414                         ?s->session_ctx->stats.sess_connect_good
2415                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2416                         {
2417                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2418                         }
2419                 }
2420         }
2421
2422 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2423         {
2424         return(s->method);
2425         }
2426
2427 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2428         {
2429         int conn= -1;
2430         int ret=1;
2431
2432         if (s->method != meth)
2433                 {
2434                 if (s->handshake_func != NULL)
2435                         conn=(s->handshake_func == s->method->ssl_connect);
2436
2437                 if (s->method->version == meth->version)
2438                         s->method=meth;
2439                 else
2440                         {
2441                         s->method->ssl_free(s);
2442                         s->method=meth;
2443                         ret=s->method->ssl_new(s);
2444                         }
2445
2446                 if (conn == 1)
2447                         s->handshake_func=meth->ssl_connect;
2448                 else if (conn == 0)
2449                         s->handshake_func=meth->ssl_accept;
2450                 }
2451         return(ret);
2452         }
2453
2454 int SSL_get_error(const SSL *s,int i)
2455         {
2456         int reason;
2457         unsigned long l;
2458         BIO *bio;
2459
2460         if (i > 0) return(SSL_ERROR_NONE);
2461
2462         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2463          * etc, where we do encode the error */
2464         if ((l=ERR_peek_error()) != 0)
2465                 {
2466                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2467                         return(SSL_ERROR_SYSCALL);
2468                 else
2469                         return(SSL_ERROR_SSL);
2470                 }
2471
2472         if ((i < 0) && SSL_want_read(s))
2473                 {
2474                 bio=SSL_get_rbio(s);
2475                 if (BIO_should_read(bio))
2476                         return(SSL_ERROR_WANT_READ);
2477                 else if (BIO_should_write(bio))
2478                         /* This one doesn't make too much sense ... We never try
2479                          * to write to the rbio, and an application program where
2480                          * rbio and wbio are separate couldn't even know what it
2481                          * should wait for.
2482                          * However if we ever set s->rwstate incorrectly
2483                          * (so that we have SSL_want_read(s) instead of
2484                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2485                          * this test works around that bug; so it might be safer
2486                          * to keep it. */
2487                         return(SSL_ERROR_WANT_WRITE);
2488                 else if (BIO_should_io_special(bio))
2489                         {
2490                         reason=BIO_get_retry_reason(bio);
2491                         if (reason == BIO_RR_CONNECT)
2492                                 return(SSL_ERROR_WANT_CONNECT);
2493                         else if (reason == BIO_RR_ACCEPT)
2494                                 return(SSL_ERROR_WANT_ACCEPT);
2495                         else
2496                                 return(SSL_ERROR_SYSCALL); /* unknown */
2497                         }
2498                 }
2499
2500         if ((i < 0) && SSL_want_write(s))
2501                 {
2502                 bio=SSL_get_wbio(s);
2503                 if (BIO_should_write(bio))
2504                         return(SSL_ERROR_WANT_WRITE);
2505                 else if (BIO_should_read(bio))
2506                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2507                         return(SSL_ERROR_WANT_READ);
2508                 else if (BIO_should_io_special(bio))
2509                         {
2510                         reason=BIO_get_retry_reason(bio);
2511                         if (reason == BIO_RR_CONNECT)
2512                                 return(SSL_ERROR_WANT_CONNECT);
2513                         else if (reason == BIO_RR_ACCEPT)
2514                                 return(SSL_ERROR_WANT_ACCEPT);
2515                         else
2516                                 return(SSL_ERROR_SYSCALL);
2517                         }
2518                 }
2519         if ((i < 0) && SSL_want_x509_lookup(s))
2520                 {
2521                 return(SSL_ERROR_WANT_X509_LOOKUP);
2522                 }
2523
2524         if (i == 0)
2525                 {
2526                 if (s->version == SSL2_VERSION)
2527                         {
2528                         /* assume it is the socket being closed */
2529                         return(SSL_ERROR_ZERO_RETURN);
2530                         }
2531                 else
2532                         {
2533                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2534                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2535                                 return(SSL_ERROR_ZERO_RETURN);
2536                         }
2537                 }
2538         return(SSL_ERROR_SYSCALL);
2539         }
2540
2541 int SSL_do_handshake(SSL *s)
2542         {
2543         int ret=1;
2544
2545         if (s->handshake_func == NULL)
2546                 {
2547                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2548                 return(-1);
2549                 }
2550
2551         s->method->ssl_renegotiate_check(s);
2552
2553         if (SSL_in_init(s) || SSL_in_before(s))
2554                 {
2555                 ret=s->handshake_func(s);
2556                 }
2557         return(ret);
2558         }
2559
2560 /* For the next 2 functions, SSL_clear() sets shutdown and so
2561  * one of these calls will reset it */
2562 void SSL_set_accept_state(SSL *s)
2563         {
2564         s->server=1;
2565         s->shutdown=0;
2566         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2567         s->handshake_func=s->method->ssl_accept;
2568         /* clear the current cipher */
2569         ssl_clear_cipher_ctx(s);
2570         ssl_clear_hash_ctx(&s->read_hash);
2571         ssl_clear_hash_ctx(&s->write_hash);
2572         }
2573
2574 void SSL_set_connect_state(SSL *s)
2575         {
2576         s->server=0;
2577         s->shutdown=0;
2578         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2579         s->handshake_func=s->method->ssl_connect;
2580         /* clear the current cipher */
2581         ssl_clear_cipher_ctx(s);
2582         ssl_clear_hash_ctx(&s->read_hash);
2583         ssl_clear_hash_ctx(&s->write_hash);
2584         }
2585
2586 int ssl_undefined_function(SSL *s)
2587         {
2588         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2589         return(0);
2590         }
2591
2592 int ssl_undefined_void_function(void)
2593         {
2594         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2595         return(0);
2596         }
2597
2598 int ssl_undefined_const_function(const SSL *s)
2599         {
2600         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2601         return(0);
2602         }
2603
2604 SSL_METHOD *ssl_bad_method(int ver)
2605         {
2606         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2607         return(NULL);
2608         }
2609
2610 const char *SSL_get_version(const SSL *s)
2611         {
2612         if (s->version == TLS1_2_VERSION)
2613                 return("TLSv1.2");
2614         else if (s->version == TLS1_1_VERSION)
2615                 return("TLSv1.1");
2616         else if (s->version == TLS1_VERSION)
2617                 return("TLSv1");
2618         else if (s->version == SSL3_VERSION)
2619                 return("SSLv3");
2620         else if (s->version == SSL2_VERSION)
2621                 return("SSLv2");
2622         else
2623                 return("unknown");
2624         }
2625
2626 SSL *SSL_dup(SSL *s)
2627         {
2628         STACK_OF(X509_NAME) *sk;
2629         X509_NAME *xn;
2630         SSL *ret;
2631         int i;
2632         
2633         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2634             return(NULL);
2635
2636         ret->version = s->version;
2637         ret->type = s->type;
2638         ret->method = s->method;
2639
2640         if (s->session != NULL)
2641                 {
2642                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2643                 SSL_copy_session_id(ret,s);
2644                 }
2645         else
2646                 {
2647                 /* No session has been established yet, so we have to expect
2648                  * that s->cert or ret->cert will be changed later --
2649                  * they should not both point to the same object,
2650                  * and thus we can't use SSL_copy_session_id. */
2651
2652                 ret->method->ssl_free(ret);
2653                 ret->method = s->method;
2654                 ret->method->ssl_new(ret);
2655
2656                 if (s->cert != NULL)
2657                         {
2658                         if (ret->cert != NULL)
2659                                 {
2660                                 ssl_cert_free(ret->cert);
2661                                 }
2662                         ret->cert = ssl_cert_dup(s->cert);
2663                         if (ret->cert == NULL)
2664                                 goto err;
2665                         }
2666                                 
2667                 SSL_set_session_id_context(ret,
2668                         s->sid_ctx, s->sid_ctx_length);
2669                 }
2670
2671         ret->options=s->options;
2672         ret->mode=s->mode;
2673         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2674         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2675         ret->msg_callback = s->msg_callback;
2676         ret->msg_callback_arg = s->msg_callback_arg;
2677         SSL_set_verify(ret,SSL_get_verify_mode(s),
2678                 SSL_get_verify_callback(s));
2679         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2680         ret->generate_session_id = s->generate_session_id;
2681
2682         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2683         
2684         ret->debug=s->debug;
2685
2686         /* copy app data, a little dangerous perhaps */
2687         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2688                 goto err;
2689
2690         /* setup rbio, and wbio */
2691         if (s->rbio != NULL)
2692                 {
2693                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2694                         goto err;
2695                 }
2696         if (s->wbio != NULL)
2697                 {
2698                 if (s->wbio != s->rbio)
2699                         {
2700                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2701                                 goto err;
2702                         }
2703                 else
2704                         ret->wbio=ret->rbio;
2705                 }
2706         ret->rwstate = s->rwstate;
2707         ret->in_handshake = s->in_handshake;
2708         ret->handshake_func = s->handshake_func;
2709         ret->server = s->server;
2710         ret->renegotiate = s->renegotiate;
2711         ret->new_session = s->new_session;
2712         ret->quiet_shutdown = s->quiet_shutdown;
2713         ret->shutdown=s->shutdown;
2714         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2715         ret->rstate=s->rstate;
2716         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2717         ret->hit=s->hit;
2718
2719         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2720
2721         /* dup the cipher_list and cipher_list_by_id stacks */
2722         if (s->cipher_list != NULL)
2723                 {
2724                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2725                         goto err;
2726                 }
2727         if (s->cipher_list_by_id != NULL)
2728                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2729                         == NULL)
2730                         goto err;
2731
2732         /* Dup the client_CA list */
2733         if (s->client_CA != NULL)
2734                 {
2735                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2736                 ret->client_CA=sk;
2737                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2738                         {
2739                         xn=sk_X509_NAME_value(sk,i);
2740                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2741                                 {
2742                                 X509_NAME_free(xn);
2743                                 goto err;
2744                                 }
2745                         }
2746                 }
2747
2748         if (0)
2749                 {
2750 err:
2751                 if (ret != NULL) SSL_free(ret);
2752                 ret=NULL;
2753                 }
2754         return(ret);
2755         }
2756
2757 void ssl_clear_cipher_ctx(SSL *s)
2758         {
2759         if (s->enc_read_ctx != NULL)
2760                 {
2761                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2762                 OPENSSL_free(s->enc_read_ctx);
2763                 s->enc_read_ctx=NULL;
2764                 }
2765         if (s->enc_write_ctx != NULL)
2766                 {
2767                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2768                 OPENSSL_free(s->enc_write_ctx);
2769                 s->enc_write_ctx=NULL;
2770                 }
2771 #ifndef OPENSSL_NO_COMP
2772         if (s->expand != NULL)
2773                 {
2774                 COMP_CTX_free(s->expand);
2775                 s->expand=NULL;
2776                 }
2777         if (s->compress != NULL)
2778                 {
2779                 COMP_CTX_free(s->compress);
2780                 s->compress=NULL;
2781                 }
2782 #endif
2783         }
2784
2785 /* Fix this function so that it takes an optional type parameter */
2786 X509 *SSL_get_certificate(const SSL *s)
2787         {
2788         if (s->cert != NULL)
2789                 return(s->cert->key->x509);
2790         else
2791                 return(NULL);
2792         }
2793
2794 /* Fix this function so that it takes an optional type parameter */
2795 EVP_PKEY *SSL_get_privatekey(SSL *s)
2796         {
2797         if (s->cert != NULL)
2798                 return(s->cert->key->privatekey);
2799         else
2800                 return(NULL);
2801         }
2802
2803 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2804         {
2805         if ((s->session != NULL) && (s->session->cipher != NULL))
2806                 return(s->session->cipher);
2807         return(NULL);
2808         }
2809 #ifdef OPENSSL_NO_COMP
2810 const void *SSL_get_current_compression(SSL *s)
2811         {
2812         return NULL;
2813         }
2814 const void *SSL_get_current_expansion(SSL *s)
2815         {
2816         return NULL;
2817         }
2818 #else
2819
2820 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2821         {
2822         if (s->compress != NULL)
2823                 return(s->compress->meth);
2824         return(NULL);
2825         }
2826
2827 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2828         {
2829         if (s->expand != NULL)
2830                 return(s->expand->meth);
2831         return(NULL);
2832         }
2833 #endif
2834
2835 int ssl_init_wbio_buffer(SSL *s,int push)
2836         {
2837         BIO *bbio;
2838
2839         if (s->bbio == NULL)
2840                 {
2841                 bbio=BIO_new(BIO_f_buffer());
2842                 if (bbio == NULL) return(0);
2843                 s->bbio=bbio;
2844                 }
2845         else
2846                 {
2847                 bbio=s->bbio;
2848                 if (s->bbio == s->wbio)
2849                         s->wbio=BIO_pop(s->wbio);
2850                 }
2851         (void)BIO_reset(bbio);
2852 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2853         if (!BIO_set_read_buffer_size(bbio,1))
2854                 {
2855                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2856                 return(0);
2857                 }
2858         if (push)
2859                 {
2860                 if (s->wbio != bbio)
2861                         s->wbio=BIO_push(bbio,s->wbio);
2862                 }
2863         else
2864                 {
2865                 if (s->wbio == bbio)
2866                         s->wbio=BIO_pop(bbio);
2867                 }
2868         return(1);
2869         }
2870
2871 void ssl_free_wbio_buffer(SSL *s)
2872         {
2873         if (s->bbio == NULL) return;
2874
2875         if (s->bbio == s->wbio)
2876                 {
2877                 /* remove buffering */
2878                 s->wbio=BIO_pop(s->wbio);
2879 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2880                 assert(s->wbio != NULL);
2881 #endif
2882         }
2883         BIO_free(s->bbio);
2884         s->bbio=NULL;
2885         }
2886         
2887 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2888         {
2889         ctx->quiet_shutdown=mode;
2890         }
2891
2892 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2893         {
2894         return(ctx->quiet_shutdown);
2895         }
2896
2897 void SSL_set_quiet_shutdown(SSL *s,int mode)
2898         {
2899         s->quiet_shutdown=mode;
2900         }
2901
2902 int SSL_get_quiet_shutdown(const SSL *s)
2903         {
2904         return(s->quiet_shutdown);
2905         }
2906
2907 void SSL_set_shutdown(SSL *s,int mode)
2908         {
2909         s->shutdown=mode;
2910         }
2911
2912 int SSL_get_shutdown(const SSL *s)
2913         {
2914         return(s->shutdown);
2915         }
2916
2917 int SSL_version(const SSL *s)
2918         {
2919         return(s->version);
2920         }
2921
2922 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2923         {
2924         return(ssl->ctx);
2925         }
2926
2927 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2928         {
2929         if (ssl->ctx == ctx)
2930                 return ssl->ctx;
2931 #ifndef OPENSSL_NO_TLSEXT
2932         if (ctx == NULL)
2933                 ctx = ssl->initial_ctx;
2934 #endif
2935         if (ssl->cert != NULL)
2936                 ssl_cert_free(ssl->cert);
2937         ssl->cert = ssl_cert_dup(ctx->cert);
2938         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2939         if (ssl->ctx != NULL)
2940                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2941         ssl->ctx = ctx;
2942         return(ssl->ctx);
2943         }
2944
2945 #ifndef OPENSSL_NO_STDIO
2946 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2947         {
2948         return(X509_STORE_set_default_paths(ctx->cert_store));
2949         }
2950
2951 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2952                 const char *CApath)
2953         {
2954         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2955         }
2956 #endif
2957
2958 void SSL_set_info_callback(SSL *ssl,
2959         void (*cb)(const SSL *ssl,int type,int val))
2960         {
2961         ssl->info_callback=cb;
2962         }
2963
2964 /* One compiler (Diab DCC) doesn't like argument names in returned
2965    function pointer.  */
2966 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2967         {
2968         return ssl->info_callback;
2969         }
2970
2971 int SSL_state(const SSL *ssl)
2972         {
2973         return(ssl->state);
2974         }
2975
2976 void SSL_set_state(SSL *ssl, int state)
2977         {
2978         ssl->state = state;
2979         }
2980
2981 void SSL_set_verify_result(SSL *ssl,long arg)
2982         {
2983         ssl->verify_result=arg;
2984         }
2985
2986 long SSL_get_verify_result(const SSL *ssl)
2987         {
2988         return(ssl->verify_result);
2989         }
2990
2991 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2992                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2993         {
2994         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2995                                 new_func, dup_func, free_func);
2996         }
2997
2998 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2999         {
3000         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3001         }
3002
3003 void *SSL_get_ex_data(const SSL *s,int idx)
3004         {
3005         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3006         }
3007
3008 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3009                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3010         {
3011         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3012                                 new_func, dup_func, free_func);
3013         }
3014
3015 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3016         {
3017         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3018         }
3019
3020 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3021         {
3022         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3023         }
3024
3025 int ssl_ok(SSL *s)
3026         {
3027         return(1);
3028         }
3029
3030 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3031         {
3032         return(ctx->cert_store);
3033         }
3034
3035 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3036         {
3037         if (ctx->cert_store != NULL)
3038                 X509_STORE_free(ctx->cert_store);
3039         ctx->cert_store=store;
3040         }
3041
3042 int SSL_want(const SSL *s)
3043         {
3044         return(s->rwstate);
3045         }
3046
3047 /*!
3048  * \brief Set the callback for generating temporary RSA keys.
3049  * \param ctx the SSL context.
3050  * \param cb the callback
3051  */
3052
3053 #ifndef OPENSSL_NO_RSA
3054 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3055                                                           int is_export,
3056                                                           int keylength))
3057     {
3058     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3059     }
3060
3061 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3062                                                   int is_export,
3063                                                   int keylength))
3064     {
3065     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3066     }
3067 #endif
3068
3069 #ifdef DOXYGEN
3070 /*!
3071  * \brief The RSA temporary key callback function.
3072  * \param ssl the SSL session.
3073  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3074  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3075  * of the required key in bits.
3076  * \return the temporary RSA key.
3077  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3078  */
3079
3080 RSA *cb(SSL *ssl,int is_export,int keylength)
3081     {}
3082 #endif
3083
3084 /*!
3085  * \brief Set the callback for generating temporary DH keys.
3086  * \param ctx the SSL context.
3087  * \param dh the callback
3088  */
3089
3090 #ifndef OPENSSL_NO_DH
3091 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3092                                                         int keylength))
3093         {
3094         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3095         }
3096
3097 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3098                                                 int keylength))
3099         {
3100         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3101         }
3102 #endif
3103
3104 #ifndef OPENSSL_NO_ECDH
3105 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3106                                                                 int keylength))
3107         {
3108         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3109         }
3110
3111 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3112                                                         int keylength))
3113         {
3114         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3115         }
3116 #endif
3117
3118 #ifndef OPENSSL_NO_PSK
3119 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3120         {
3121         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3122                 {
3123                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3124                 return 0;
3125                 }
3126         if (ctx->psk_identity_hint != NULL)
3127                 OPENSSL_free(ctx->psk_identity_hint);
3128         if (identity_hint != NULL)
3129                 {
3130                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3131                 if (ctx->psk_identity_hint == NULL)
3132                         return 0;
3133                 }
3134         else
3135                 ctx->psk_identity_hint = NULL;
3136         return 1;
3137         }
3138
3139 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3140         {
3141         if (s == NULL)
3142                 return 0;
3143
3144         if (s->session == NULL)
3145                 return 1; /* session not created yet, ignored */
3146
3147         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3148                 {
3149                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3150                 return 0;
3151                 }
3152         if (s->session->psk_identity_hint != NULL)
3153                 OPENSSL_free(s->session->psk_identity_hint);
3154         if (identity_hint != NULL)
3155                 {
3156                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3157                 if (s->session->psk_identity_hint == NULL)
3158                         return 0;
3159                 }
3160         else
3161                 s->session->psk_identity_hint = NULL;
3162         return 1;
3163         }
3164
3165 const char *SSL_get_psk_identity_hint(const SSL *s)
3166         {
3167         if (s == NULL || s->session == NULL)
3168                 return NULL;
3169         return(s->session->psk_identity_hint);
3170         }
3171
3172 const char *SSL_get_psk_identity(const SSL *s)
3173         {
3174         if (s == NULL || s->session == NULL)
3175                 return NULL;
3176         return(s->session->psk_identity);
3177         }
3178
3179 void SSL_set_psk_client_callback(SSL *s,
3180     unsigned int (*cb)(SSL *ssl, const char *hint,
3181                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3182                        unsigned int max_psk_len))
3183         {
3184         s->psk_client_callback = cb;
3185         }
3186
3187 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
3188     unsigned int (*cb)(SSL *ssl, const char *hint,
3189                        char *identity, unsigned int max_identity_len, unsigned char *psk,
3190                        unsigned int max_psk_len))
3191         {
3192         ctx->psk_client_callback = cb;
3193         }
3194
3195 void SSL_set_psk_server_callback(SSL *s,
3196     unsigned int (*cb)(SSL *ssl, const char *identity,
3197                        unsigned char *psk, unsigned int max_psk_len))
3198         {
3199         s->psk_server_callback = cb;
3200         }
3201
3202 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
3203     unsigned int (*cb)(SSL *ssl, const char *identity,
3204                        unsigned char *psk, unsigned int max_psk_len))
3205         {
3206         ctx->psk_server_callback = cb;
3207         }
3208 #endif
3209
3210 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))
3211         {
3212         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3213         }
3214 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))
3215         {
3216         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3217         }
3218
3219 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3220         int (*cb)(SSL *ssl, int is_forward_secure))
3221         {
3222         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3223                 (void (*)(void))cb);
3224         }
3225 void SSL_set_not_resumable_session_callback(SSL *ssl,
3226         int (*cb)(SSL *ssl, int is_forward_secure))
3227         {
3228         SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3229                 (void (*)(void))cb);
3230         }
3231
3232 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3233  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
3234  * any. If EVP_MD pointer is passed, initializes ctx with this md
3235  * Returns newly allocated ctx;
3236  */
3237
3238 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
3239 {
3240         ssl_clear_hash_ctx(hash);
3241         *hash = EVP_MD_CTX_create();
3242         if (md) EVP_DigestInit_ex(*hash,md,NULL);
3243         return *hash;
3244 }
3245 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
3246 {
3247
3248         if (*hash) EVP_MD_CTX_destroy(*hash);
3249         *hash=NULL;
3250 }
3251
3252 void SSL_set_debug(SSL *s, int debug)
3253         {
3254         s->debug = debug;
3255         }
3256
3257 int SSL_cache_hit(SSL *s)
3258         {
3259         return s->hit;
3260         }
3261
3262 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
3263 #include "../crypto/bio/bss_file.c"
3264 #endif
3265
3266 IMPLEMENT_STACK_OF(SSL_CIPHER)
3267 IMPLEMENT_STACK_OF(SSL_COMP)
3268 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
3269                                     ssl_cipher_id);