Compare encodings in X509_cmp as well as hash.
[openssl.git] / ssl / ssl_lib.c
1 /*! \file ssl/ssl_lib.c
2  *  \brief Version independent SSL functions.
3  */
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5  * All rights reserved.
6  *
7  * This package is an SSL implementation written
8  * by Eric Young (eay@cryptsoft.com).
9  * The implementation was written so as to conform with Netscapes SSL.
10  * 
11  * This library is free for commercial and non-commercial use as long as
12  * the following conditions are aheared to.  The following conditions
13  * apply to all code found in this distribution, be it the RC4, RSA,
14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
15  * included with this distribution is covered by the same copyright terms
16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
17  * 
18  * Copyright remains Eric Young's, and as such any Copyright notices in
19  * the code are not to be removed.
20  * If this package is used in a product, Eric Young should be given attribution
21  * as the author of the parts of the library used.
22  * This can be in the form of a textual message at program startup or
23  * in documentation (online or textual) provided with the package.
24  * 
25  * Redistribution and use in source and binary forms, with or without
26  * modification, are permitted provided that the following conditions
27  * are met:
28  * 1. Redistributions of source code must retain the copyright
29  *    notice, this list of conditions and the following disclaimer.
30  * 2. Redistributions in binary form must reproduce the above copyright
31  *    notice, this list of conditions and the following disclaimer in the
32  *    documentation and/or other materials provided with the distribution.
33  * 3. All advertising materials mentioning features or use of this software
34  *    must display the following acknowledgement:
35  *    "This product includes cryptographic software written by
36  *     Eric Young (eay@cryptsoft.com)"
37  *    The word 'cryptographic' can be left out if the rouines from the library
38  *    being used are not cryptographic related :-).
39  * 4. If you include any Windows specific code (or a derivative thereof) from 
40  *    the apps directory (application code) you must include an acknowledgement:
41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
42  * 
43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53  * SUCH DAMAGE.
54  * 
55  * The licence and distribution terms for any publically available version or
56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
57  * copied and put under another distribution licence
58  * [including the GNU Public Licence.]
59  */
60 /* ====================================================================
61  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
62  *
63  * Redistribution and use in source and binary forms, with or without
64  * modification, are permitted provided that the following conditions
65  * are met:
66  *
67  * 1. Redistributions of source code must retain the above copyright
68  *    notice, this list of conditions and the following disclaimer. 
69  *
70  * 2. Redistributions in binary form must reproduce the above copyright
71  *    notice, this list of conditions and the following disclaimer in
72  *    the documentation and/or other materials provided with the
73  *    distribution.
74  *
75  * 3. All advertising materials mentioning features or use of this
76  *    software must display the following acknowledgment:
77  *    "This product includes software developed by the OpenSSL Project
78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
79  *
80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81  *    endorse or promote products derived from this software without
82  *    prior written permission. For written permission, please contact
83  *    openssl-core@openssl.org.
84  *
85  * 5. Products derived from this software may not be called "OpenSSL"
86  *    nor may "OpenSSL" appear in their names without prior written
87  *    permission of the OpenSSL Project.
88  *
89  * 6. Redistributions of any form whatsoever must retain the following
90  *    acknowledgment:
91  *    "This product includes software developed by the OpenSSL Project
92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
93  *
94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105  * OF THE POSSIBILITY OF SUCH DAMAGE.
106  * ====================================================================
107  *
108  * This product includes cryptographic software written by Eric Young
109  * (eay@cryptsoft.com).  This product includes software written by Tim
110  * Hudson (tjh@cryptsoft.com).
111  *
112  */
113 /* ====================================================================
114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115  * ECC cipher suite support in OpenSSL originally developed by 
116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117  */
118 /* ====================================================================
119  * Copyright 2005 Nokia. All rights reserved.
120  *
121  * The portions of the attached software ("Contribution") is developed by
122  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
123  * license.
124  *
125  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
126  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
127  * support (see RFC 4279) to OpenSSL.
128  *
129  * No patent licenses or other rights except those expressly stated in
130  * the OpenSSL open source license shall be deemed granted or received
131  * expressly, by implication, estoppel, or otherwise.
132  *
133  * No assurances are provided by Nokia that the Contribution does not
134  * infringe the patent or other intellectual property rights of any third
135  * party or that the license provides you with all the necessary rights
136  * to make use of the Contribution.
137  *
138  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
139  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
140  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
141  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
142  * OTHERWISE.
143  */
144
145 #ifdef REF_CHECK
146 #  include <assert.h>
147 #endif
148 #include <stdio.h>
149 #include "ssl_locl.h"
150 #include "kssl_lcl.h"
151 #include <openssl/objects.h>
152 #include <openssl/lhash.h>
153 #include <openssl/x509v3.h>
154 #include <openssl/rand.h>
155 #include <openssl/ocsp.h>
156 #ifndef OPENSSL_NO_DH
157 #include <openssl/dh.h>
158 #endif
159 #ifndef OPENSSL_NO_ENGINE
160 #include <openssl/engine.h>
161 #endif
162
163 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
164
165 SSL3_ENC_METHOD ssl3_undef_enc_method={
166         /* evil casts, but these functions are only called if there's a library bug */
167         (int (*)(SSL *,int))ssl_undefined_function,
168         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
169         ssl_undefined_function,
170         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
171         (int (*)(SSL*, int))ssl_undefined_function,
172         (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
173         0,      /* finish_mac_length */
174         (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
175         NULL,   /* client_finished_label */
176         0,      /* client_finished_label_len */
177         NULL,   /* server_finished_label */
178         0,      /* server_finished_label_len */
179         (int (*)(int))ssl_undefined_function,
180         (int (*)(SSL *, unsigned char *, size_t, const char *,
181                  size_t, const unsigned char *, size_t,
182                  int use_context)) ssl_undefined_function,
183         };
184
185 int SSL_clear(SSL *s)
186         {
187
188         if (s->method == NULL)
189                 {
190                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
191                 return(0);
192                 }
193
194         if (ssl_clear_bad_session(s))
195                 {
196                 SSL_SESSION_free(s->session);
197                 s->session=NULL;
198                 }
199
200         s->error=0;
201         s->hit=0;
202         s->shutdown=0;
203
204 #if 0 /* Disabled since version 1.10 of this file (early return not
205        * needed because SSL_clear is not called when doing renegotiation) */
206         /* This is set if we are doing dynamic renegotiation so keep
207          * the old cipher.  It is sort of a SSL_clear_lite :-) */
208         if (s->renegotiate) return(1);
209 #else
210         if (s->renegotiate)
211                 {
212                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
213                 return 0;
214                 }
215 #endif
216
217         s->type=0;
218
219         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
220
221         s->version=s->method->version;
222         s->client_version=s->version;
223         s->rwstate=SSL_NOTHING;
224         s->rstate=SSL_ST_READ_HEADER;
225 #if 0
226         s->read_ahead=s->ctx->read_ahead;
227 #endif
228
229         if (s->init_buf != NULL)
230                 {
231                 BUF_MEM_free(s->init_buf);
232                 s->init_buf=NULL;
233                 }
234
235         ssl_clear_cipher_ctx(s);
236         ssl_clear_hash_ctx(&s->read_hash);
237         ssl_clear_hash_ctx(&s->write_hash);
238
239         s->first_packet=0;
240
241 #if 1
242         /* Check to see if we were changed into a different method, if
243          * so, revert back if we are not doing session-id reuse. */
244         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
245                 {
246                 s->method->ssl_free(s);
247                 s->method=s->ctx->method;
248                 if (!s->method->ssl_new(s))
249                         return(0);
250                 }
251         else
252 #endif
253                 s->method->ssl_clear(s);
254         return(1);
255         }
256
257 /** Used to change an SSL_CTXs default SSL method type */
258 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
259         {
260         STACK_OF(SSL_CIPHER) *sk;
261
262         ctx->method=meth;
263
264         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
265                 &(ctx->cipher_list_by_id),
266                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ctx->cert);
267         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
268                 {
269                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
270                 return(0);
271                 }
272         return(1);
273         }
274
275 SSL *SSL_new(SSL_CTX *ctx)
276         {
277         SSL *s;
278
279         if (ctx == NULL)
280                 {
281                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
282                 return(NULL);
283                 }
284         if (ctx->method == NULL)
285                 {
286                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
287                 return(NULL);
288                 }
289
290         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
291         if (s == NULL) goto err;
292         memset(s,0,sizeof(SSL));
293
294 #ifndef OPENSSL_NO_KRB5
295         s->kssl_ctx = kssl_ctx_new();
296 #endif  /* OPENSSL_NO_KRB5 */
297
298         s->options=ctx->options;
299         s->mode=ctx->mode;
300         s->max_cert_list=ctx->max_cert_list;
301
302         if (ctx->cert != NULL)
303                 {
304                 /* Earlier library versions used to copy the pointer to
305                  * the CERT, not its contents; only when setting new
306                  * parameters for the per-SSL copy, ssl_cert_new would be
307                  * called (and the direct reference to the per-SSL_CTX
308                  * settings would be lost, but those still were indirectly
309                  * accessed for various purposes, and for that reason they
310                  * used to be known as s->ctx->default_cert).
311                  * Now we don't look at the SSL_CTX's CERT after having
312                  * duplicated it once. */
313
314                 s->cert = ssl_cert_dup(ctx->cert);
315                 if (s->cert == NULL)
316                         goto err;
317                 }
318         else
319                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
320
321         s->read_ahead=ctx->read_ahead;
322         s->msg_callback=ctx->msg_callback;
323         s->msg_callback_arg=ctx->msg_callback_arg;
324         s->verify_mode=ctx->verify_mode;
325         s->not_resumable_session_cb=ctx->not_resumable_session_cb;
326 #if 0
327         s->verify_depth=ctx->verify_depth;
328 #endif
329         s->sid_ctx_length=ctx->sid_ctx_length;
330         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
331         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
332         s->verify_callback=ctx->default_verify_callback;
333         s->generate_session_id=ctx->generate_session_id;
334
335         s->param = X509_VERIFY_PARAM_new();
336         if (!s->param)
337                 goto err;
338         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
339 #if 0
340         s->purpose = ctx->purpose;
341         s->trust = ctx->trust;
342 #endif
343         s->quiet_shutdown=ctx->quiet_shutdown;
344         s->max_send_fragment = ctx->max_send_fragment;
345
346         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
347         s->ctx=ctx;
348 #ifndef OPENSSL_NO_TLSEXT
349         s->tlsext_debug_cb = 0;
350         s->tlsext_debug_arg = NULL;
351         s->tlsext_ticket_expected = 0;
352         s->tlsext_status_type = -1;
353         s->tlsext_status_expected = 0;
354         s->tlsext_ocsp_ids = NULL;
355         s->tlsext_ocsp_exts = NULL;
356         s->tlsext_ocsp_resp = NULL;
357         s->tlsext_ocsp_resplen = -1;
358         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
359         s->initial_ctx=ctx;
360 #ifndef OPENSSL_NO_EC
361         if (ctx->tlsext_ecpointformatlist)
362                 {
363                 s->tlsext_ecpointformatlist =
364                         BUF_memdup(ctx->tlsext_ecpointformatlist,
365                                         ctx->tlsext_ecpointformatlist_length);
366                 if (!s->tlsext_ecpointformatlist)
367                         goto err;
368                 s->tlsext_ecpointformatlist_length =
369                                         ctx->tlsext_ecpointformatlist_length;
370                 }
371         if (ctx->tlsext_ellipticcurvelist)
372                 {
373                 s->tlsext_ellipticcurvelist =
374                         BUF_memdup(ctx->tlsext_ellipticcurvelist,
375                                         ctx->tlsext_ellipticcurvelist_length);
376                 if (!s->tlsext_ellipticcurvelist)
377                         goto err;
378                 s->tlsext_ellipticcurvelist_length = 
379                                         ctx->tlsext_ellipticcurvelist_length;
380                 }
381 #endif
382 # ifndef OPENSSL_NO_NEXTPROTONEG
383         s->next_proto_negotiated = NULL;
384 # endif
385
386         if (s->ctx->alpn_client_proto_list)
387                 {
388                 s->alpn_client_proto_list =
389                         OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
390                 if (s->alpn_client_proto_list == NULL)
391                         goto err;
392                 memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
393                        s->ctx->alpn_client_proto_list_len);
394                 s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
395                 }
396 #endif
397
398         s->verify_result=X509_V_OK;
399
400         s->method=ctx->method;
401
402         if (!s->method->ssl_new(s))
403                 goto err;
404
405         s->references=1;
406         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
407
408         SSL_clear(s);
409
410         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
411
412 #ifndef OPENSSL_NO_PSK
413         s->psk_client_callback=ctx->psk_client_callback;
414         s->psk_server_callback=ctx->psk_server_callback;
415 #endif
416
417         return(s);
418 err:
419         if (s != NULL)
420                 {
421                 if (s->cert != NULL)
422                         ssl_cert_free(s->cert);
423                 if (s->ctx != NULL)
424                         SSL_CTX_free(s->ctx); /* decrement reference count */
425                 OPENSSL_free(s);
426                 }
427         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
428         return(NULL);
429         }
430
431 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
432                                    unsigned int sid_ctx_len)
433     {
434     if(sid_ctx_len > sizeof ctx->sid_ctx)
435         {
436         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
437         return 0;
438         }
439     ctx->sid_ctx_length=sid_ctx_len;
440     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
441
442     return 1;
443     }
444
445 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
446                                unsigned int sid_ctx_len)
447     {
448     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
449         {
450         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
451         return 0;
452         }
453     ssl->sid_ctx_length=sid_ctx_len;
454     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
455
456     return 1;
457     }
458
459 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
460         {
461         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
462         ctx->generate_session_id = cb;
463         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
464         return 1;
465         }
466
467 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
468         {
469         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
470         ssl->generate_session_id = cb;
471         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
472         return 1;
473         }
474
475 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
476                                 unsigned int id_len)
477         {
478         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
479          * we can "construct" a session to give us the desired check - ie. to
480          * find if there's a session in the hash table that would conflict with
481          * any new session built out of this id/id_len and the ssl_version in
482          * use by this SSL. */
483         SSL_SESSION r, *p;
484
485         if(id_len > sizeof r.session_id)
486                 return 0;
487
488         r.ssl_version = ssl->version;
489         r.session_id_length = id_len;
490         memcpy(r.session_id, id, id_len);
491         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
492          * callback is calling us to check the uniqueness of a shorter ID, it
493          * must be compared as a padded-out ID because that is what it will be
494          * converted to when the callback has finished choosing it. */
495         if((r.ssl_version == SSL2_VERSION) &&
496                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
497                 {
498                 memset(r.session_id + id_len, 0,
499                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
500                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
501                 }
502
503         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
504         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
505         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
506         return (p != NULL);
507         }
508
509 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
510         {
511         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
512         }
513
514 int SSL_set_purpose(SSL *s, int purpose)
515         {
516         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
517         }
518
519 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
520         {
521         return X509_VERIFY_PARAM_set_trust(s->param, trust);
522         }
523
524 int SSL_set_trust(SSL *s, int trust)
525         {
526         return X509_VERIFY_PARAM_set_trust(s->param, trust);
527         }
528
529 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
530         {
531         return X509_VERIFY_PARAM_set1(ctx->param, vpm);
532         }
533
534 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
535         {
536         return X509_VERIFY_PARAM_set1(ssl->param, vpm);
537         }
538
539 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
540         {
541         return ctx->param;
542         }
543
544 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
545         {
546         return ssl->param;
547         }
548
549 void SSL_certs_clear(SSL *s)
550         {
551         ssl_cert_clear_certs(s->cert);
552         }
553
554 void SSL_free(SSL *s)
555         {
556         int i;
557
558         if(s == NULL)
559             return;
560
561         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
562 #ifdef REF_PRINT
563         REF_PRINT("SSL",s);
564 #endif
565         if (i > 0) return;
566 #ifdef REF_CHECK
567         if (i < 0)
568                 {
569                 fprintf(stderr,"SSL_free, bad reference count\n");
570                 abort(); /* ok */
571                 }
572 #endif
573
574         if (s->param)
575                 X509_VERIFY_PARAM_free(s->param);
576
577         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
578
579         if (s->bbio != NULL)
580                 {
581                 /* If the buffering BIO is in place, pop it off */
582                 if (s->bbio == s->wbio)
583                         {
584                         s->wbio=BIO_pop(s->wbio);
585                         }
586                 BIO_free(s->bbio);
587                 s->bbio=NULL;
588                 }
589         if (s->rbio != NULL)
590                 BIO_free_all(s->rbio);
591         if ((s->wbio != NULL) && (s->wbio != s->rbio))
592                 BIO_free_all(s->wbio);
593
594         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
595
596         /* add extra stuff */
597         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
598         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
599
600         /* Make the next call work :-) */
601         if (s->session != NULL)
602                 {
603                 ssl_clear_bad_session(s);
604                 SSL_SESSION_free(s->session);
605                 }
606
607         ssl_clear_cipher_ctx(s);
608         ssl_clear_hash_ctx(&s->read_hash);
609         ssl_clear_hash_ctx(&s->write_hash);
610
611         if (s->cert != NULL) ssl_cert_free(s->cert);
612         /* Free up if allocated */
613
614 #ifndef OPENSSL_NO_TLSEXT
615         if (s->tlsext_hostname)
616                 OPENSSL_free(s->tlsext_hostname);
617         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
618 #ifndef OPENSSL_NO_EC
619         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
620         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
621 #endif /* OPENSSL_NO_EC */
622         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
623         if (s->tlsext_ocsp_exts)
624                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
625                                                 X509_EXTENSION_free);
626         if (s->tlsext_ocsp_ids)
627                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
628         if (s->tlsext_ocsp_resp)
629                 OPENSSL_free(s->tlsext_ocsp_resp);
630         if (s->alpn_client_proto_list)
631                 OPENSSL_free(s->alpn_client_proto_list);
632 #endif
633
634         if (s->client_CA != NULL)
635                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
636
637         if (s->method != NULL) s->method->ssl_free(s);
638
639         if (s->ctx) SSL_CTX_free(s->ctx);
640
641 #ifndef OPENSSL_NO_KRB5
642         if (s->kssl_ctx != NULL)
643                 kssl_ctx_free(s->kssl_ctx);
644 #endif  /* OPENSSL_NO_KRB5 */
645
646 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
647         if (s->next_proto_negotiated)
648                 OPENSSL_free(s->next_proto_negotiated);
649 #endif
650
651         if (s->srtp_profiles)
652             sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
653
654         OPENSSL_free(s);
655         }
656
657 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
658         {
659         /* If the output buffering BIO is still in place, remove it
660          */
661         if (s->bbio != NULL)
662                 {
663                 if (s->wbio == s->bbio)
664                         {
665                         s->wbio=s->wbio->next_bio;
666                         s->bbio->next_bio=NULL;
667                         }
668                 }
669         if ((s->rbio != NULL) && (s->rbio != rbio))
670                 BIO_free_all(s->rbio);
671         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
672                 BIO_free_all(s->wbio);
673         s->rbio=rbio;
674         s->wbio=wbio;
675         }
676
677 BIO *SSL_get_rbio(const SSL *s)
678         { return(s->rbio); }
679
680 BIO *SSL_get_wbio(const SSL *s)
681         { return(s->wbio); }
682
683 int SSL_get_fd(const SSL *s)
684         {
685         return(SSL_get_rfd(s));
686         }
687
688 int SSL_get_rfd(const SSL *s)
689         {
690         int ret= -1;
691         BIO *b,*r;
692
693         b=SSL_get_rbio(s);
694         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
695         if (r != NULL)
696                 BIO_get_fd(r,&ret);
697         return(ret);
698         }
699
700 int SSL_get_wfd(const SSL *s)
701         {
702         int ret= -1;
703         BIO *b,*r;
704
705         b=SSL_get_wbio(s);
706         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
707         if (r != NULL)
708                 BIO_get_fd(r,&ret);
709         return(ret);
710         }
711
712 #ifndef OPENSSL_NO_SOCK
713 int SSL_set_fd(SSL *s,int fd)
714         {
715         int ret=0;
716         BIO *bio=NULL;
717
718         bio=BIO_new(BIO_s_socket());
719
720         if (bio == NULL)
721                 {
722                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
723                 goto err;
724                 }
725         BIO_set_fd(bio,fd,BIO_NOCLOSE);
726         SSL_set_bio(s,bio,bio);
727         ret=1;
728 err:
729         return(ret);
730         }
731
732 int SSL_set_wfd(SSL *s,int fd)
733         {
734         int ret=0;
735         BIO *bio=NULL;
736
737         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
738                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
739                 {
740                 bio=BIO_new(BIO_s_socket());
741
742                 if (bio == NULL)
743                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
744                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
745                 SSL_set_bio(s,SSL_get_rbio(s),bio);
746                 }
747         else
748                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
749         ret=1;
750 err:
751         return(ret);
752         }
753
754 int SSL_set_rfd(SSL *s,int fd)
755         {
756         int ret=0;
757         BIO *bio=NULL;
758
759         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
760                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
761                 {
762                 bio=BIO_new(BIO_s_socket());
763
764                 if (bio == NULL)
765                         {
766                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
767                         goto err;
768                         }
769                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
770                 SSL_set_bio(s,bio,SSL_get_wbio(s));
771                 }
772         else
773                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
774         ret=1;
775 err:
776         return(ret);
777         }
778 #endif
779
780
781 /* return length of latest Finished message we sent, copy to 'buf' */
782 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
783         {
784         size_t ret = 0;
785         
786         if (s->s3 != NULL)
787                 {
788                 ret = s->s3->tmp.finish_md_len;
789                 if (count > ret)
790                         count = ret;
791                 memcpy(buf, s->s3->tmp.finish_md, count);
792                 }
793         return ret;
794         }
795
796 /* return length of latest Finished message we expected, copy to 'buf' */
797 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
798         {
799         size_t ret = 0;
800         
801         if (s->s3 != NULL)
802                 {
803                 ret = s->s3->tmp.peer_finish_md_len;
804                 if (count > ret)
805                         count = ret;
806                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
807                 }
808         return ret;
809         }
810
811
812 int SSL_get_verify_mode(const SSL *s)
813         {
814         return(s->verify_mode);
815         }
816
817 int SSL_get_verify_depth(const SSL *s)
818         {
819         return X509_VERIFY_PARAM_get_depth(s->param);
820         }
821
822 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
823         {
824         return(s->verify_callback);
825         }
826
827 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
828         {
829         return(ctx->verify_mode);
830         }
831
832 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
833         {
834         return X509_VERIFY_PARAM_get_depth(ctx->param);
835         }
836
837 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
838         {
839         return(ctx->default_verify_callback);
840         }
841
842 void SSL_set_verify(SSL *s,int mode,
843                     int (*callback)(int ok,X509_STORE_CTX *ctx))
844         {
845         s->verify_mode=mode;
846         if (callback != NULL)
847                 s->verify_callback=callback;
848         }
849
850 void SSL_set_verify_depth(SSL *s,int depth)
851         {
852         X509_VERIFY_PARAM_set_depth(s->param, depth);
853         }
854
855 void SSL_set_read_ahead(SSL *s,int yes)
856         {
857         s->read_ahead=yes;
858         }
859
860 int SSL_get_read_ahead(const SSL *s)
861         {
862         return(s->read_ahead);
863         }
864
865 int SSL_pending(const SSL *s)
866         {
867         /* SSL_pending cannot work properly if read-ahead is enabled
868          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
869          * and it is impossible to fix since SSL_pending cannot report
870          * errors that may be observed while scanning the new data.
871          * (Note that SSL_pending() is often used as a boolean value,
872          * so we'd better not return -1.)
873          */
874         return(s->method->ssl_pending(s));
875         }
876
877 X509 *SSL_get_peer_certificate(const SSL *s)
878         {
879         X509 *r;
880         
881         if ((s == NULL) || (s->session == NULL))
882                 r=NULL;
883         else
884                 r=s->session->peer;
885
886         if (r == NULL) return(r);
887
888         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
889
890         return(r);
891         }
892
893 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
894         {
895         STACK_OF(X509) *r;
896         
897         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
898                 r=NULL;
899         else
900                 r=s->session->sess_cert->cert_chain;
901
902         /* If we are a client, cert_chain includes the peer's own
903          * certificate; if we are a server, it does not. */
904         
905         return(r);
906         }
907
908 /* Now in theory, since the calling process own 't' it should be safe to
909  * modify.  We need to be able to read f without being hassled */
910 void SSL_copy_session_id(SSL *t,const SSL *f)
911         {
912         CERT *tmp;
913
914         /* Do we need to to SSL locking? */
915         SSL_set_session(t,SSL_get_session(f));
916
917         /* what if we are setup as SSLv2 but want to talk SSLv3 or
918          * vice-versa */
919         if (t->method != f->method)
920                 {
921                 t->method->ssl_free(t); /* cleanup current */
922                 t->method=f->method;    /* change method */
923                 t->method->ssl_new(t);  /* setup new */
924                 }
925
926         tmp=t->cert;
927         if (f->cert != NULL)
928                 {
929                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
930                 t->cert=f->cert;
931                 }
932         else
933                 t->cert=NULL;
934         if (tmp != NULL) ssl_cert_free(tmp);
935         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
936         }
937
938 /* Fix this so it checks all the valid key/cert options */
939 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
940         {
941         if (    (ctx == NULL) ||
942                 (ctx->cert == NULL) ||
943                 (ctx->cert->key->x509 == NULL))
944                 {
945                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
946                 return(0);
947                 }
948         if      (ctx->cert->key->privatekey == NULL)
949                 {
950                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
951                 return(0);
952                 }
953         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
954         }
955
956 /* Fix this function so that it takes an optional type parameter */
957 int SSL_check_private_key(const SSL *ssl)
958         {
959         if (ssl == NULL)
960                 {
961                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
962                 return(0);
963                 }
964         if (ssl->cert == NULL)
965                 {
966                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
967                 return 0;
968                 }
969         if (ssl->cert->key->x509 == NULL)
970                 {
971                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
972                 return(0);
973                 }
974         if (ssl->cert->key->privatekey == NULL)
975                 {
976                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
977                 return(0);
978                 }
979         return(X509_check_private_key(ssl->cert->key->x509,
980                 ssl->cert->key->privatekey));
981         }
982
983 int SSL_accept(SSL *s)
984         {
985         if (s->handshake_func == 0)
986                 /* Not properly initialized yet */
987                 SSL_set_accept_state(s);
988
989         return(s->method->ssl_accept(s));
990         }
991
992 int SSL_connect(SSL *s)
993         {
994         if (s->handshake_func == 0)
995                 /* Not properly initialized yet */
996                 SSL_set_connect_state(s);
997
998         return(s->method->ssl_connect(s));
999         }
1000
1001 long SSL_get_default_timeout(const SSL *s)
1002         {
1003         return(s->method->get_timeout());
1004         }
1005
1006 int SSL_read(SSL *s,void *buf,int num)
1007         {
1008         if (s->handshake_func == 0)
1009                 {
1010                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
1011                 return -1;
1012                 }
1013
1014         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1015                 {
1016                 s->rwstate=SSL_NOTHING;
1017                 return(0);
1018                 }
1019         return(s->method->ssl_read(s,buf,num));
1020         }
1021
1022 int SSL_peek(SSL *s,void *buf,int num)
1023         {
1024         if (s->handshake_func == 0)
1025                 {
1026                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
1027                 return -1;
1028                 }
1029
1030         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
1031                 {
1032                 return(0);
1033                 }
1034         return(s->method->ssl_peek(s,buf,num));
1035         }
1036
1037 int SSL_write(SSL *s,const void *buf,int num)
1038         {
1039         if (s->handshake_func == 0)
1040                 {
1041                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
1042                 return -1;
1043                 }
1044
1045         if (s->shutdown & SSL_SENT_SHUTDOWN)
1046                 {
1047                 s->rwstate=SSL_NOTHING;
1048                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
1049                 return(-1);
1050                 }
1051         return(s->method->ssl_write(s,buf,num));
1052         }
1053
1054 int SSL_shutdown(SSL *s)
1055         {
1056         /* Note that this function behaves differently from what one might
1057          * expect.  Return values are 0 for no success (yet),
1058          * 1 for success; but calling it once is usually not enough,
1059          * even if blocking I/O is used (see ssl3_shutdown).
1060          */
1061
1062         if (s->handshake_func == 0)
1063                 {
1064                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1065                 return -1;
1066                 }
1067
1068         if ((s != NULL) && !SSL_in_init(s))
1069                 return(s->method->ssl_shutdown(s));
1070         else
1071                 return(1);
1072         }
1073
1074 int SSL_renegotiate(SSL *s)
1075         {
1076         if (s->renegotiate == 0)
1077                 s->renegotiate=1;
1078
1079         s->new_session=1;
1080
1081         return(s->method->ssl_renegotiate(s));
1082         }
1083
1084 int SSL_renegotiate_abbreviated(SSL *s)
1085         {
1086         if (s->renegotiate == 0)
1087                 s->renegotiate=1;
1088
1089         s->new_session=0;
1090
1091         return(s->method->ssl_renegotiate(s));
1092         }
1093
1094 int SSL_renegotiate_pending(SSL *s)
1095         {
1096         /* becomes true when negotiation is requested;
1097          * false again once a handshake has finished */
1098         return (s->renegotiate != 0);
1099         }
1100
1101 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1102         {
1103         long l;
1104
1105         switch (cmd)
1106                 {
1107         case SSL_CTRL_GET_READ_AHEAD:
1108                 return(s->read_ahead);
1109         case SSL_CTRL_SET_READ_AHEAD:
1110                 l=s->read_ahead;
1111                 s->read_ahead=larg;
1112                 return(l);
1113
1114         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1115                 s->msg_callback_arg = parg;
1116                 return 1;
1117
1118         case SSL_CTRL_OPTIONS:
1119                 return(s->options|=larg);
1120         case SSL_CTRL_CLEAR_OPTIONS:
1121                 return(s->options&=~larg);
1122         case SSL_CTRL_MODE:
1123                 return(s->mode|=larg);
1124         case SSL_CTRL_CLEAR_MODE:
1125                 return(s->mode &=~larg);
1126         case SSL_CTRL_GET_MAX_CERT_LIST:
1127                 return(s->max_cert_list);
1128         case SSL_CTRL_SET_MAX_CERT_LIST:
1129                 l=s->max_cert_list;
1130                 s->max_cert_list=larg;
1131                 return(l);
1132         case SSL_CTRL_SET_MTU:
1133 #ifndef OPENSSL_NO_DTLS1
1134                 if (larg < (long)dtls1_min_mtu())
1135                         return 0;
1136 #endif
1137
1138                 if (SSL_IS_DTLS(s))
1139                         {
1140                         s->d1->mtu = larg;
1141                         return larg;
1142                         }
1143                 return 0;
1144         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1145                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1146                         return 0;
1147                 s->max_send_fragment = larg;
1148                 return 1;
1149         case SSL_CTRL_GET_RI_SUPPORT:
1150                 if (s->s3)
1151                         return s->s3->send_connection_binding;
1152                 else return 0;
1153         case SSL_CTRL_CERT_FLAGS:
1154                 return(s->cert->cert_flags|=larg);
1155         case SSL_CTRL_CLEAR_CERT_FLAGS:
1156                 return(s->cert->cert_flags &=~larg);
1157
1158         case SSL_CTRL_GET_RAW_CIPHERLIST:
1159                 if (parg)
1160                         {
1161                         if (s->cert->ciphers_raw == NULL)
1162                                 return 0;
1163                         *(unsigned char **)parg = s->cert->ciphers_raw;
1164                         return (int)s->cert->ciphers_rawlen;
1165                         }
1166                 else
1167                         return ssl_put_cipher_by_char(s,NULL,NULL);
1168         default:
1169                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1170                 }
1171         }
1172
1173 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1174         {
1175         switch(cmd)
1176                 {
1177         case SSL_CTRL_SET_MSG_CALLBACK:
1178                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1179                 return 1;
1180                 
1181         default:
1182                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1183                 }
1184         }
1185
1186 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1187         {
1188         return ctx->sessions;
1189         }
1190
1191 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1192         {
1193         long l;
1194         /* For some cases with ctx == NULL perform syntax checks */
1195         if (ctx == NULL)
1196                 {
1197                 switch (cmd)
1198                         {
1199 #ifndef OPENSSL_NO_EC
1200                 case SSL_CTRL_SET_CURVES_LIST:
1201                         return tls1_set_curves_list(NULL, NULL, parg);
1202 #endif
1203                 case SSL_CTRL_SET_SIGALGS_LIST:
1204                 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
1205                         return tls1_set_sigalgs_list(NULL, parg, 0);
1206                 default:
1207                         return 0;
1208                         }
1209                 }
1210
1211         switch (cmd)
1212                 {
1213         case SSL_CTRL_GET_READ_AHEAD:
1214                 return(ctx->read_ahead);
1215         case SSL_CTRL_SET_READ_AHEAD:
1216                 l=ctx->read_ahead;
1217                 ctx->read_ahead=larg;
1218                 return(l);
1219                 
1220         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1221                 ctx->msg_callback_arg = parg;
1222                 return 1;
1223
1224         case SSL_CTRL_GET_MAX_CERT_LIST:
1225                 return(ctx->max_cert_list);
1226         case SSL_CTRL_SET_MAX_CERT_LIST:
1227                 l=ctx->max_cert_list;
1228                 ctx->max_cert_list=larg;
1229                 return(l);
1230
1231         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1232                 l=ctx->session_cache_size;
1233                 ctx->session_cache_size=larg;
1234                 return(l);
1235         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1236                 return(ctx->session_cache_size);
1237         case SSL_CTRL_SET_SESS_CACHE_MODE:
1238                 l=ctx->session_cache_mode;
1239                 ctx->session_cache_mode=larg;
1240                 return(l);
1241         case SSL_CTRL_GET_SESS_CACHE_MODE:
1242                 return(ctx->session_cache_mode);
1243
1244         case SSL_CTRL_SESS_NUMBER:
1245                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1246         case SSL_CTRL_SESS_CONNECT:
1247                 return(ctx->stats.sess_connect);
1248         case SSL_CTRL_SESS_CONNECT_GOOD:
1249                 return(ctx->stats.sess_connect_good);
1250         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1251                 return(ctx->stats.sess_connect_renegotiate);
1252         case SSL_CTRL_SESS_ACCEPT:
1253                 return(ctx->stats.sess_accept);
1254         case SSL_CTRL_SESS_ACCEPT_GOOD:
1255                 return(ctx->stats.sess_accept_good);
1256         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1257                 return(ctx->stats.sess_accept_renegotiate);
1258         case SSL_CTRL_SESS_HIT:
1259                 return(ctx->stats.sess_hit);
1260         case SSL_CTRL_SESS_CB_HIT:
1261                 return(ctx->stats.sess_cb_hit);
1262         case SSL_CTRL_SESS_MISSES:
1263                 return(ctx->stats.sess_miss);
1264         case SSL_CTRL_SESS_TIMEOUTS:
1265                 return(ctx->stats.sess_timeout);
1266         case SSL_CTRL_SESS_CACHE_FULL:
1267                 return(ctx->stats.sess_cache_full);
1268         case SSL_CTRL_OPTIONS:
1269                 return(ctx->options|=larg);
1270         case SSL_CTRL_CLEAR_OPTIONS:
1271                 return(ctx->options&=~larg);
1272         case SSL_CTRL_MODE:
1273                 return(ctx->mode|=larg);
1274         case SSL_CTRL_CLEAR_MODE:
1275                 return(ctx->mode&=~larg);
1276         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1277                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1278                         return 0;
1279                 ctx->max_send_fragment = larg;
1280                 return 1;
1281         case SSL_CTRL_CERT_FLAGS:
1282                 return(ctx->cert->cert_flags|=larg);
1283         case SSL_CTRL_CLEAR_CERT_FLAGS:
1284                 return(ctx->cert->cert_flags &=~larg);
1285         default:
1286                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1287                 }
1288         }
1289
1290 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1291         {
1292         switch(cmd)
1293                 {
1294         case SSL_CTRL_SET_MSG_CALLBACK:
1295                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1296                 return 1;
1297
1298         default:
1299                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1300                 }
1301         }
1302
1303 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1304         {
1305         long l;
1306
1307         l=a->id-b->id;
1308         if (l == 0L)
1309                 return(0);
1310         else
1311                 return((l > 0)?1:-1);
1312         }
1313
1314 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1315                         const SSL_CIPHER * const *bp)
1316         {
1317         long l;
1318
1319         l=(*ap)->id-(*bp)->id;
1320         if (l == 0L)
1321                 return(0);
1322         else
1323                 return((l > 0)?1:-1);
1324         }
1325
1326 /** return a STACK of the ciphers available for the SSL and in order of
1327  * preference */
1328 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1329         {
1330         if (s != NULL)
1331                 {
1332                 if (s->cipher_list != NULL)
1333                         {
1334                         return(s->cipher_list);
1335                         }
1336                 else if ((s->ctx != NULL) &&
1337                         (s->ctx->cipher_list != NULL))
1338                         {
1339                         return(s->ctx->cipher_list);
1340                         }
1341                 }
1342         return(NULL);
1343         }
1344
1345 /** return a STACK of the ciphers available for the SSL and in order of
1346  * algorithm id */
1347 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1348         {
1349         if (s != NULL)
1350                 {
1351                 if (s->cipher_list_by_id != NULL)
1352                         {
1353                         return(s->cipher_list_by_id);
1354                         }
1355                 else if ((s->ctx != NULL) &&
1356                         (s->ctx->cipher_list_by_id != NULL))
1357                         {
1358                         return(s->ctx->cipher_list_by_id);
1359                         }
1360                 }
1361         return(NULL);
1362         }
1363
1364 /** The old interface to get the same thing as SSL_get_ciphers() */
1365 const char *SSL_get_cipher_list(const SSL *s,int n)
1366         {
1367         SSL_CIPHER *c;
1368         STACK_OF(SSL_CIPHER) *sk;
1369
1370         if (s == NULL) return(NULL);
1371         sk=SSL_get_ciphers(s);
1372         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1373                 return(NULL);
1374         c=sk_SSL_CIPHER_value(sk,n);
1375         if (c == NULL) return(NULL);
1376         return(c->name);
1377         }
1378
1379 /** specify the ciphers to be used by default by the SSL_CTX */
1380 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1381         {
1382         STACK_OF(SSL_CIPHER) *sk;
1383         
1384         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1385                 &ctx->cipher_list_by_id,str, ctx->cert);
1386         /* ssl_create_cipher_list may return an empty stack if it
1387          * was unable to find a cipher matching the given rule string
1388          * (for example if the rule string specifies a cipher which
1389          * has been disabled). This is not an error as far as
1390          * ssl_create_cipher_list is concerned, and hence
1391          * ctx->cipher_list and ctx->cipher_list_by_id has been
1392          * updated. */
1393         if (sk == NULL)
1394                 return 0;
1395         else if (sk_SSL_CIPHER_num(sk) == 0)
1396                 {
1397                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1398                 return 0;
1399                 }
1400         return 1;
1401         }
1402
1403 /** specify the ciphers to be used by the SSL */
1404 int SSL_set_cipher_list(SSL *s,const char *str)
1405         {
1406         STACK_OF(SSL_CIPHER) *sk;
1407         
1408         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1409                 &s->cipher_list_by_id,str, s->cert);
1410         /* see comment in SSL_CTX_set_cipher_list */
1411         if (sk == NULL)
1412                 return 0;
1413         else if (sk_SSL_CIPHER_num(sk) == 0)
1414                 {
1415                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1416                 return 0;
1417                 }
1418         return 1;
1419         }
1420
1421 /* works well for SSLv2, not so good for SSLv3 */
1422 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1423         {
1424         char *p;
1425         STACK_OF(SSL_CIPHER) *sk;
1426         SSL_CIPHER *c;
1427         int i;
1428
1429         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1430                 (len < 2))
1431                 return(NULL);
1432
1433         p=buf;
1434         sk=s->session->ciphers;
1435         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1436                 {
1437                 int n;
1438
1439                 c=sk_SSL_CIPHER_value(sk,i);
1440                 n=strlen(c->name);
1441                 if (n+1 > len)
1442                         {
1443                         if (p != buf)
1444                                 --p;
1445                         *p='\0';
1446                         return buf;
1447                         }
1448                 strcpy(p,c->name);
1449                 p+=n;
1450                 *(p++)=':';
1451                 len-=n+1;
1452                 }
1453         p[-1]='\0';
1454         return(buf);
1455         }
1456
1457 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1458                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1459         {
1460         int i,j=0;
1461         SSL_CIPHER *c;
1462         CERT *ct = s->cert;
1463         unsigned char *q;
1464         int no_scsv = s->renegotiate;
1465         /* Set disabled masks for this session */
1466         ssl_set_client_disabled(s);
1467
1468         if (sk == NULL) return(0);
1469         q=p;
1470
1471         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1472                 {
1473                 c=sk_SSL_CIPHER_value(sk,i);
1474                 /* Skip disabled ciphers */
1475                 if (c->algorithm_ssl & ct->mask_ssl ||
1476                         c->algorithm_mkey & ct->mask_k ||
1477                         c->algorithm_auth & ct->mask_a)
1478                         continue;
1479 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1480                 if (c->id == SSL3_CK_SCSV)
1481                         {
1482                         if (no_scsv)
1483                                 continue;
1484                         else
1485                                 no_scsv = 1;
1486                         }
1487 #endif
1488                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1489                 p+=j;
1490                 }
1491         /* If p == q, no ciphers and caller indicates an error. Otherwise
1492          * add SCSV if not renegotiating.
1493          */
1494         if (p != q && !no_scsv)
1495                 {
1496                 static SSL_CIPHER scsv =
1497                         {
1498                         0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
1499                         };
1500                 j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
1501                 p+=j;
1502 #ifdef OPENSSL_RI_DEBUG
1503                 fprintf(stderr, "SCSV sent by client\n");
1504 #endif
1505                 }
1506
1507         return(p-q);
1508         }
1509
1510 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1511                                                STACK_OF(SSL_CIPHER) **skp)
1512         {
1513         const SSL_CIPHER *c;
1514         STACK_OF(SSL_CIPHER) *sk;
1515         int i,n;
1516         if (s->s3)
1517                 s->s3->send_connection_binding = 0;
1518
1519         n=ssl_put_cipher_by_char(s,NULL,NULL);
1520         if ((num%n) != 0)
1521                 {
1522                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1523                 return(NULL);
1524                 }
1525         if ((skp == NULL) || (*skp == NULL))
1526                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1527         else
1528                 {
1529                 sk= *skp;
1530                 sk_SSL_CIPHER_zero(sk);
1531                 }
1532
1533         if (s->cert->ciphers_raw)
1534                 OPENSSL_free(s->cert->ciphers_raw);
1535         s->cert->ciphers_raw = BUF_memdup(p, num);
1536         if (s->cert->ciphers_raw == NULL)
1537                 {
1538                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1539                 goto err;
1540                 }
1541         s->cert->ciphers_rawlen = (size_t)num;
1542
1543         for (i=0; i<num; i+=n)
1544                 {
1545                 /* Check for SCSV */
1546                 if (s->s3 && (n != 3 || !p[0]) &&
1547                         (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
1548                         (p[n-1] == (SSL3_CK_SCSV & 0xff)))
1549                         {
1550                         /* SCSV fatal if renegotiating */
1551                         if (s->renegotiate)
1552                                 {
1553                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
1554                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
1555                                 goto err;
1556                                 }
1557                         s->s3->send_connection_binding = 1;
1558                         p += n;
1559 #ifdef OPENSSL_RI_DEBUG
1560                         fprintf(stderr, "SCSV received by server\n");
1561 #endif
1562                         continue;
1563                         }
1564
1565                 c=ssl_get_cipher_by_char(s,p);
1566                 p+=n;
1567                 if (c != NULL)
1568                         {
1569                         if (!sk_SSL_CIPHER_push(sk,c))
1570                                 {
1571                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1572                                 goto err;
1573                                 }
1574                         }
1575                 }
1576
1577         if (skp != NULL)
1578                 *skp=sk;
1579         return(sk);
1580 err:
1581         if ((skp == NULL) || (*skp == NULL))
1582                 sk_SSL_CIPHER_free(sk);
1583         return(NULL);
1584         }
1585
1586
1587 #ifndef OPENSSL_NO_TLSEXT
1588 /** return a servername extension value if provided in Client Hello, or NULL.
1589  * So far, only host_name types are defined (RFC 3546).
1590  */
1591
1592 const char *SSL_get_servername(const SSL *s, const int type)
1593         {
1594         if (type != TLSEXT_NAMETYPE_host_name)
1595                 return NULL;
1596
1597         return s->session && !s->tlsext_hostname ?
1598                 s->session->tlsext_hostname :
1599                 s->tlsext_hostname;
1600         }
1601
1602 int SSL_get_servername_type(const SSL *s)
1603         {
1604         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1605                 return TLSEXT_NAMETYPE_host_name;
1606         return -1;
1607         }
1608
1609 /* SSL_select_next_proto implements the standard protocol selection. It is
1610  * expected that this function is called from the callback set by
1611  * SSL_CTX_set_next_proto_select_cb.
1612  *
1613  * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
1614  * strings. The length byte itself is not included in the length. A byte
1615  * string of length 0 is invalid. No byte string may be truncated.
1616  *
1617  * The current, but experimental algorithm for selecting the protocol is:
1618  *
1619  * 1) If the server doesn't support NPN then this is indicated to the
1620  * callback. In this case, the client application has to abort the connection
1621  * or have a default application level protocol.
1622  *
1623  * 2) If the server supports NPN, but advertises an empty list then the
1624  * client selects the first protcol in its list, but indicates via the
1625  * API that this fallback case was enacted.
1626  *
1627  * 3) Otherwise, the client finds the first protocol in the server's list
1628  * that it supports and selects this protocol. This is because it's
1629  * assumed that the server has better information about which protocol
1630  * a client should use.
1631  *
1632  * 4) If the client doesn't support any of the server's advertised
1633  * protocols, then this is treated the same as case 2.
1634  *
1635  * It returns either
1636  * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
1637  * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
1638  */
1639 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)
1640         {
1641         unsigned int i, j;
1642         const unsigned char *result;
1643         int status = OPENSSL_NPN_UNSUPPORTED;
1644
1645         /* For each protocol in server preference order, see if we support it. */
1646         for (i = 0; i < server_len; )
1647                 {
1648                 for (j = 0; j < client_len; )
1649                         {
1650                         if (server[i] == client[j] &&
1651                             memcmp(&server[i+1], &client[j+1], server[i]) == 0)
1652                                 {
1653                                 /* We found a match */
1654                                 result = &server[i];
1655                                 status = OPENSSL_NPN_NEGOTIATED;
1656                                 goto found;
1657                                 }
1658                         j += client[j];
1659                         j++;
1660                         }
1661                 i += server[i];
1662                 i++;
1663                 }
1664
1665         /* There's no overlap between our protocols and the server's list. */
1666         result = client;
1667         status = OPENSSL_NPN_NO_OVERLAP;
1668
1669         found:
1670         *out = (unsigned char *) result + 1;
1671         *outlen = result[0];
1672         return status;
1673         }
1674
1675 # ifndef OPENSSL_NO_NEXTPROTONEG
1676 /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
1677  * requested protocol for this connection and returns 0. If the client didn't
1678  * request any protocol, then *data is set to NULL.
1679  *
1680  * Note that the client can request any protocol it chooses. The value returned
1681  * from this function need not be a member of the list of supported protocols
1682  * provided by the callback.
1683  */
1684 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
1685         {
1686         *data = s->next_proto_negotiated;
1687         if (!*data) {
1688                 *len = 0;
1689         } else {
1690                 *len = s->next_proto_negotiated_len;
1691         }
1692 }
1693
1694 /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
1695  * TLS server needs a list of supported protocols for Next Protocol
1696  * Negotiation. The returned list must be in wire format.  The list is returned
1697  * by setting |out| to point to it and |outlen| to its length. This memory will
1698  * not be modified, but one should assume that the SSL* keeps a reference to
1699  * it.
1700  *
1701  * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
1702  * such extension will be included in the ServerHello. */
1703 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)
1704         {
1705         ctx->next_protos_advertised_cb = cb;
1706         ctx->next_protos_advertised_cb_arg = arg;
1707         }
1708
1709 /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
1710  * client needs to select a protocol from the server's provided list. |out|
1711  * must be set to point to the selected protocol (which may be within |in|).
1712  * The length of the protocol name must be written into |outlen|. The server's
1713  * advertised protocols are provided in |in| and |inlen|. The callback can
1714  * assume that |in| is syntactically valid.
1715  *
1716  * The client must select a protocol. It is fatal to the connection if this
1717  * callback returns a value other than SSL_TLSEXT_ERR_OK.
1718  */
1719 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)
1720         {
1721         ctx->next_proto_select_cb = cb;
1722         ctx->next_proto_select_cb_arg = arg;
1723         }
1724 # endif
1725
1726 int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
1727                                custom_cli_ext_first_cb_fn fn1, 
1728                                custom_cli_ext_second_cb_fn fn2, void* arg)
1729         {
1730         size_t i;
1731         custom_cli_ext_record* record;
1732
1733         /* Check for duplicates */
1734         for (i=0; i < ctx->custom_cli_ext_records_count; i++)
1735                 if (ext_type == ctx->custom_cli_ext_records[i].ext_type)
1736                         return 0;
1737
1738         ctx->custom_cli_ext_records = OPENSSL_realloc(ctx->custom_cli_ext_records,
1739                                                       (ctx->custom_cli_ext_records_count + 1) * 
1740                                                       sizeof(custom_cli_ext_record));
1741         if (!ctx->custom_cli_ext_records) {
1742                 ctx->custom_cli_ext_records_count = 0;
1743                 return 0;
1744         }
1745         ctx->custom_cli_ext_records_count++;
1746         record = &ctx->custom_cli_ext_records[ctx->custom_cli_ext_records_count - 1];
1747         record->ext_type = ext_type;
1748         record->fn1 = fn1;
1749         record->fn2 = fn2;
1750         record->arg = arg;
1751         return 1;
1752         }
1753
1754 int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
1755                                custom_srv_ext_first_cb_fn fn1, 
1756                                custom_srv_ext_second_cb_fn fn2, void* arg)
1757         {
1758         size_t i;
1759         custom_srv_ext_record* record;
1760
1761         /* Check for duplicates */      
1762         for (i=0; i < ctx->custom_srv_ext_records_count; i++)
1763                 if (ext_type == ctx->custom_srv_ext_records[i].ext_type)
1764                         return 0;
1765
1766         ctx->custom_srv_ext_records = OPENSSL_realloc(ctx->custom_srv_ext_records,
1767                                                       (ctx->custom_srv_ext_records_count + 1) * 
1768                                                       sizeof(custom_srv_ext_record));
1769         if (!ctx->custom_srv_ext_records) {
1770                 ctx->custom_srv_ext_records_count = 0;
1771                 return 0;
1772         }
1773         ctx->custom_srv_ext_records_count++;
1774         record = &ctx->custom_srv_ext_records[ctx->custom_srv_ext_records_count - 1];
1775         record->ext_type = ext_type;
1776         record->fn1 = fn1;
1777         record->fn2 = fn2;
1778         record->arg = arg;
1779         return 1;
1780         }
1781
1782 /* SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
1783  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1784  * length-prefixed strings).
1785  *
1786  * Returns 0 on success. */
1787 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
1788                             unsigned protos_len)
1789         {
1790         if (ctx->alpn_client_proto_list)
1791                 OPENSSL_free(ctx->alpn_client_proto_list);
1792
1793         ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1794         if (!ctx->alpn_client_proto_list)
1795                 return 1;
1796         memcpy(ctx->alpn_client_proto_list, protos, protos_len);
1797         ctx->alpn_client_proto_list_len = protos_len;
1798
1799         return 0;
1800         }
1801
1802 /* SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
1803  * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
1804  * length-prefixed strings).
1805  *
1806  * Returns 0 on success. */
1807 int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
1808                         unsigned protos_len)
1809         {
1810         if (ssl->alpn_client_proto_list)
1811                 OPENSSL_free(ssl->alpn_client_proto_list);
1812
1813         ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
1814         if (!ssl->alpn_client_proto_list)
1815                 return 1;
1816         memcpy(ssl->alpn_client_proto_list, protos, protos_len);
1817         ssl->alpn_client_proto_list_len = protos_len;
1818
1819         return 0;
1820         }
1821
1822 /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called
1823  * during ClientHello processing in order to select an ALPN protocol from the
1824  * client's list of offered protocols. */
1825 void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
1826                                 int (*cb) (SSL *ssl,
1827                                            const unsigned char **out,
1828                                            unsigned char *outlen,
1829                                            const unsigned char *in,
1830                                            unsigned int inlen,
1831                                            void *arg),
1832                                 void *arg)
1833         {
1834         ctx->alpn_select_cb = cb;
1835         ctx->alpn_select_cb_arg = arg;
1836         }
1837
1838 /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
1839  * On return it sets |*data| to point to |*len| bytes of protocol name (not
1840  * including the leading length-prefix byte). If the server didn't respond with
1841  * a negotiated protocol then |*len| will be zero. */
1842 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
1843                             unsigned *len)
1844         {
1845         *data = NULL;
1846         if (ssl->s3)
1847                 *data = ssl->s3->alpn_selected;
1848         if (*data == NULL)
1849                 *len = 0;
1850         else
1851                 *len = ssl->s3->alpn_selected_len;
1852         }
1853
1854 int SSL_CTX_set_cli_supp_data(SSL_CTX *ctx,
1855                               unsigned short supp_data_type,
1856                               cli_supp_data_first_cb_fn fn1,
1857                               cli_supp_data_second_cb_fn fn2, void* arg)
1858         {
1859         size_t i;
1860         cli_supp_data_record* record;
1861
1862         /* Check for duplicates */
1863         for (i=0; i < ctx->cli_supp_data_records_count; i++)
1864                 if (supp_data_type == ctx->cli_supp_data_records[i].supp_data_type)
1865                         return 0;
1866
1867         ctx->cli_supp_data_records = OPENSSL_realloc(ctx->cli_supp_data_records,
1868           (ctx->cli_supp_data_records_count+1) * sizeof(cli_supp_data_record));
1869         if (!ctx->cli_supp_data_records)
1870                 {
1871                 ctx->cli_supp_data_records_count = 0;
1872                 return 0;
1873                 }
1874         ctx->cli_supp_data_records_count++;
1875         record = &ctx->cli_supp_data_records[ctx->cli_supp_data_records_count - 1];
1876         record->supp_data_type = supp_data_type;
1877         record->fn1 = fn1;
1878         record->fn2 = fn2;
1879         record->arg = arg;
1880         return 1;
1881         }
1882
1883 int SSL_CTX_set_srv_supp_data(SSL_CTX *ctx,
1884                               unsigned short supp_data_type,
1885                               srv_supp_data_first_cb_fn fn1,
1886                               srv_supp_data_second_cb_fn fn2, void* arg)
1887         {
1888         size_t i;
1889         srv_supp_data_record* record;
1890
1891         /* Check for duplicates */
1892         for (i=0; i < ctx->srv_supp_data_records_count; i++)
1893                 if (supp_data_type == ctx->srv_supp_data_records[i].supp_data_type)
1894                         return 0;
1895
1896         ctx->srv_supp_data_records = OPENSSL_realloc(ctx->srv_supp_data_records,
1897           (ctx->srv_supp_data_records_count+1) * sizeof(srv_supp_data_record));
1898         if (!ctx->srv_supp_data_records)
1899                 {
1900                 ctx->srv_supp_data_records_count = 0;
1901                 return 0;
1902                 }
1903         ctx->srv_supp_data_records_count++;
1904         record = &ctx->srv_supp_data_records[ctx->srv_supp_data_records_count - 1];
1905         record->supp_data_type = supp_data_type;
1906         record->fn1 = fn1;
1907         record->fn2 = fn2;
1908         record->arg = arg;
1909
1910         return 1;
1911         }
1912
1913 #endif /* !OPENSSL_NO_TLSEXT */
1914
1915 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1916         const char *label, size_t llen, const unsigned char *p, size_t plen,
1917         int use_context)
1918         {
1919         if (s->version < TLS1_VERSION)
1920                 return -1;
1921
1922         return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
1923                                                            llen, p, plen,
1924                                                            use_context);
1925         }
1926
1927 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1928         {
1929         unsigned long l;
1930
1931         l=(unsigned long)
1932                 ((unsigned int) a->session_id[0]     )|
1933                 ((unsigned int) a->session_id[1]<< 8L)|
1934                 ((unsigned long)a->session_id[2]<<16L)|
1935                 ((unsigned long)a->session_id[3]<<24L);
1936         return(l);
1937         }
1938
1939 /* NB: If this function (or indeed the hash function which uses a sort of
1940  * coarser function than this one) is changed, ensure
1941  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1942  * able to construct an SSL_SESSION that will collide with any existing session
1943  * with a matching session ID. */
1944 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1945         {
1946         if (a->ssl_version != b->ssl_version)
1947                 return(1);
1948         if (a->session_id_length != b->session_id_length)
1949                 return(1);
1950         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1951         }
1952
1953 /* These wrapper functions should remain rather than redeclaring
1954  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1955  * variable. The reason is that the functions aren't static, they're exposed via
1956  * ssl.h. */
1957 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1958 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1959
1960 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1961         {
1962         SSL_CTX *ret=NULL;
1963
1964         if (meth == NULL)
1965                 {
1966                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1967                 return(NULL);
1968                 }
1969
1970 #ifdef OPENSSL_FIPS
1971         if (FIPS_mode() && (meth->version < TLS1_VERSION))      
1972                 {
1973                 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1974                 return NULL;
1975                 }
1976 #endif
1977
1978         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1979                 {
1980                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1981                 goto err;
1982                 }
1983         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1984         if (ret == NULL)
1985                 goto err;
1986
1987         memset(ret,0,sizeof(SSL_CTX));
1988
1989         ret->method=meth;
1990
1991         ret->cert_store=NULL;
1992         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1993         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1994         ret->session_cache_head=NULL;
1995         ret->session_cache_tail=NULL;
1996
1997         /* We take the system default */
1998         ret->session_timeout=meth->get_timeout();
1999
2000         ret->new_session_cb=0;
2001         ret->remove_session_cb=0;
2002         ret->get_session_cb=0;
2003         ret->generate_session_id=0;
2004
2005         memset((char *)&ret->stats,0,sizeof(ret->stats));
2006
2007         ret->references=1;
2008         ret->quiet_shutdown=0;
2009
2010 /*      ret->cipher=NULL;*/
2011 /*      ret->s2->challenge=NULL;
2012         ret->master_key=NULL;
2013         ret->key_arg=NULL;
2014         ret->s2->conn_id=NULL; */
2015
2016         ret->info_callback=NULL;
2017
2018         ret->app_verify_callback=0;
2019         ret->app_verify_arg=NULL;
2020
2021         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
2022         ret->read_ahead=0;
2023         ret->msg_callback=0;
2024         ret->msg_callback_arg=NULL;
2025         ret->verify_mode=SSL_VERIFY_NONE;
2026 #if 0
2027         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
2028 #endif
2029         ret->sid_ctx_length=0;
2030         ret->default_verify_callback=NULL;
2031         if ((ret->cert=ssl_cert_new()) == NULL)
2032                 goto err;
2033
2034         ret->default_passwd_callback=0;
2035         ret->default_passwd_callback_userdata=NULL;
2036         ret->client_cert_cb=0;
2037         ret->app_gen_cookie_cb=0;
2038         ret->app_verify_cookie_cb=0;
2039
2040         ret->sessions=lh_SSL_SESSION_new();
2041         if (ret->sessions == NULL) goto err;
2042         ret->cert_store=X509_STORE_new();
2043         if (ret->cert_store == NULL) goto err;
2044
2045         ssl_create_cipher_list(ret->method,
2046                 &ret->cipher_list,&ret->cipher_list_by_id,
2047                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST, ret->cert);
2048         if (ret->cipher_list == NULL
2049             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
2050                 {
2051                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
2052                 goto err2;
2053                 }
2054
2055         ret->param = X509_VERIFY_PARAM_new();
2056         if (!ret->param)
2057                 goto err;
2058
2059         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
2060                 {
2061                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
2062                 goto err2;
2063                 }
2064         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
2065                 {
2066                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2067                 goto err2;
2068                 }
2069         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
2070                 {
2071                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2072                 goto err2;
2073                 }
2074
2075         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
2076                 goto err;
2077
2078         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
2079
2080         ret->extra_certs=NULL;
2081         /* No compression for DTLS */
2082         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
2083                 ret->comp_methods=SSL_COMP_get_compression_methods();
2084
2085         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2086
2087 #ifndef OPENSSL_NO_TLSEXT
2088         ret->tlsext_servername_callback = 0;
2089         ret->tlsext_servername_arg = NULL;
2090         /* Setup RFC4507 ticket keys */
2091         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
2092                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
2093                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
2094                 ret->options |= SSL_OP_NO_TICKET;
2095
2096         ret->tlsext_status_cb = 0;
2097         ret->tlsext_status_arg = NULL;
2098
2099 # ifndef OPENSSL_NO_NEXTPROTONEG
2100         ret->next_protos_advertised_cb = 0;
2101         ret->next_proto_select_cb = 0;
2102 # endif
2103 #endif
2104 #ifndef OPENSSL_NO_PSK
2105         ret->psk_identity_hint=NULL;
2106         ret->psk_client_callback=NULL;
2107         ret->psk_server_callback=NULL;
2108 #endif
2109 #ifndef OPENSSL_NO_SRP
2110         SSL_CTX_SRP_CTX_init(ret);
2111 #endif
2112         ret->custom_cli_ext_records = NULL;
2113         ret->custom_cli_ext_records_count = 0;
2114         ret->custom_srv_ext_records = NULL;
2115         ret->custom_srv_ext_records_count = 0;
2116         ret->cli_supp_data_records = NULL;
2117         ret->cli_supp_data_records_count = 0;
2118         ret->srv_supp_data_records = NULL;
2119         ret->srv_supp_data_records_count = 0;
2120 #ifndef OPENSSL_NO_BUF_FREELISTS
2121         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
2122         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2123         if (!ret->rbuf_freelist)
2124                 goto err;
2125         ret->rbuf_freelist->chunklen = 0;
2126         ret->rbuf_freelist->len = 0;
2127         ret->rbuf_freelist->head = NULL;
2128         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
2129         if (!ret->wbuf_freelist)
2130                 {
2131                 OPENSSL_free(ret->rbuf_freelist);
2132                 goto err;
2133                 }
2134         ret->wbuf_freelist->chunklen = 0;
2135         ret->wbuf_freelist->len = 0;
2136         ret->wbuf_freelist->head = NULL;
2137 #endif
2138 #ifndef OPENSSL_NO_ENGINE
2139         ret->client_cert_engine = NULL;
2140 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2141 #define eng_strx(x)     #x
2142 #define eng_str(x)      eng_strx(x)
2143         /* Use specific client engine automatically... ignore errors */
2144         {
2145         ENGINE *eng;
2146         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2147         if (!eng)
2148                 {
2149                 ERR_clear_error();
2150                 ENGINE_load_builtin_engines();
2151                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2152                 }
2153         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2154                 ERR_clear_error();
2155         }
2156 #endif
2157 #endif
2158         /* Default is to connect to non-RI servers. When RI is more widely
2159          * deployed might change this.
2160          */
2161         ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2162
2163         return(ret);
2164 err:
2165         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
2166 err2:
2167         if (ret != NULL) SSL_CTX_free(ret);
2168         return(NULL);
2169         }
2170
2171 #if 0
2172 static void SSL_COMP_free(SSL_COMP *comp)
2173     { OPENSSL_free(comp); }
2174 #endif
2175
2176 #ifndef OPENSSL_NO_BUF_FREELISTS
2177 static void
2178 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
2179         {
2180         SSL3_BUF_FREELIST_ENTRY *ent, *next;
2181         for (ent = list->head; ent; ent = next)
2182                 {
2183                 next = ent->next;
2184                 OPENSSL_free(ent);
2185                 }
2186         OPENSSL_free(list);
2187         }
2188 #endif
2189
2190 void SSL_CTX_free(SSL_CTX *a)
2191         {
2192         int i;
2193
2194         if (a == NULL) return;
2195
2196         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
2197 #ifdef REF_PRINT
2198         REF_PRINT("SSL_CTX",a);
2199 #endif
2200         if (i > 0) return;
2201 #ifdef REF_CHECK
2202         if (i < 0)
2203                 {
2204                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
2205                 abort(); /* ok */
2206                 }
2207 #endif
2208
2209         if (a->param)
2210                 X509_VERIFY_PARAM_free(a->param);
2211
2212         /*
2213          * Free internal session cache. However: the remove_cb() may reference
2214          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2215          * after the sessions were flushed.
2216          * As the ex_data handling routines might also touch the session cache,
2217          * the most secure solution seems to be: empty (flush) the cache, then
2218          * free ex_data, then finally free the cache.
2219          * (See ticket [openssl.org #212].)
2220          */
2221         if (a->sessions != NULL)
2222                 SSL_CTX_flush_sessions(a,0);
2223
2224         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2225
2226         if (a->sessions != NULL)
2227                 lh_SSL_SESSION_free(a->sessions);
2228
2229         if (a->cert_store != NULL)
2230                 X509_STORE_free(a->cert_store);
2231         if (a->cipher_list != NULL)
2232                 sk_SSL_CIPHER_free(a->cipher_list);
2233         if (a->cipher_list_by_id != NULL)
2234                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2235         if (a->cert != NULL)
2236                 ssl_cert_free(a->cert);
2237         if (a->client_CA != NULL)
2238                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
2239         if (a->extra_certs != NULL)
2240                 sk_X509_pop_free(a->extra_certs,X509_free);
2241 #if 0 /* This should never be done, since it removes a global database */
2242         if (a->comp_methods != NULL)
2243                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
2244 #else
2245         a->comp_methods = NULL;
2246 #endif
2247
2248         if (a->srtp_profiles)
2249                 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2250
2251 #ifndef OPENSSL_NO_PSK
2252         if (a->psk_identity_hint)
2253                 OPENSSL_free(a->psk_identity_hint);
2254 #endif
2255 #ifndef OPENSSL_NO_SRP
2256         SSL_CTX_SRP_CTX_free(a);
2257 #endif
2258 #ifndef OPENSSL_NO_TLSEXT
2259         OPENSSL_free(a->custom_cli_ext_records);
2260         OPENSSL_free(a->custom_srv_ext_records);
2261         OPENSSL_free(a->cli_supp_data_records);
2262         OPENSSL_free(a->srv_supp_data_records);
2263 #endif
2264 #ifndef OPENSSL_NO_ENGINE
2265         if (a->client_cert_engine)
2266                 ENGINE_finish(a->client_cert_engine);
2267 #endif
2268
2269 #ifndef OPENSSL_NO_BUF_FREELISTS
2270         if (a->wbuf_freelist)
2271                 ssl_buf_freelist_free(a->wbuf_freelist);
2272         if (a->rbuf_freelist)
2273                 ssl_buf_freelist_free(a->rbuf_freelist);
2274 #endif
2275 #ifndef OPENSSL_NO_TLSEXT
2276 # ifndef OPENSSL_NO_EC
2277         if (a->tlsext_ecpointformatlist)
2278                 OPENSSL_free(a->tlsext_ecpointformatlist);
2279         if (a->tlsext_ellipticcurvelist)
2280                 OPENSSL_free(a->tlsext_ellipticcurvelist);
2281 # endif /* OPENSSL_NO_EC */
2282         if (a->alpn_client_proto_list != NULL)
2283                 OPENSSL_free(a->alpn_client_proto_list);
2284 #endif
2285
2286         OPENSSL_free(a);
2287         }
2288
2289 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2290         {
2291         ctx->default_passwd_callback=cb;
2292         }
2293
2294 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
2295         {
2296         ctx->default_passwd_callback_userdata=u;
2297         }
2298
2299 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
2300         {
2301         ctx->app_verify_callback=cb;
2302         ctx->app_verify_arg=arg;
2303         }
2304
2305 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
2306         {
2307         ctx->verify_mode=mode;
2308         ctx->default_verify_callback=cb;
2309         }
2310
2311 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
2312         {
2313         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2314         }
2315
2316 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg)
2317         {
2318         ssl_cert_set_cert_cb(c->cert, cb, arg);
2319         }
2320
2321 void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg)
2322         {
2323         ssl_cert_set_cert_cb(s->cert, cb, arg);
2324         }
2325
2326 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
2327         {
2328         CERT_PKEY *cpk;
2329         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
2330         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
2331         int rsa_tmp_export,dh_tmp_export,kl;
2332         unsigned long mask_k,mask_a,emask_k,emask_a;
2333 #ifndef OPENSSL_NO_ECDSA
2334         int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
2335 #endif
2336 #ifndef OPENSSL_NO_ECDH
2337         int have_ecdh_tmp, ecdh_ok;
2338 #endif
2339 #ifndef OPENSSL_NO_EC
2340         X509 *x = NULL;
2341         EVP_PKEY *ecc_pkey = NULL;
2342         int signature_nid = 0, pk_nid = 0, md_nid = 0;
2343 #endif
2344         if (c == NULL) return;
2345
2346         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
2347
2348 #ifndef OPENSSL_NO_RSA
2349         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
2350         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
2351                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
2352 #else
2353         rsa_tmp=rsa_tmp_export=0;
2354 #endif
2355 #ifndef OPENSSL_NO_DH
2356         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
2357         dh_tmp_export=(c->dh_tmp_cb != NULL ||
2358                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
2359 #else
2360         dh_tmp=dh_tmp_export=0;
2361 #endif
2362
2363 #ifndef OPENSSL_NO_ECDH
2364         have_ecdh_tmp=(c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
2365 #endif
2366         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
2367         rsa_enc= cpk->valid_flags & CERT_PKEY_VALID;
2368         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2369         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
2370         rsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2371         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
2372         dsa_sign= cpk->valid_flags & CERT_PKEY_SIGN;
2373         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
2374         dh_rsa=  cpk->valid_flags & CERT_PKEY_VALID;
2375         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2376         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
2377 /* FIX THIS EAY EAY EAY */
2378         dh_dsa=  cpk->valid_flags & CERT_PKEY_VALID;
2379         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
2380         cpk= &(c->pkeys[SSL_PKEY_ECC]);
2381 #ifndef OPENSSL_NO_EC
2382         have_ecc_cert= cpk->valid_flags & CERT_PKEY_VALID;
2383 #endif
2384         mask_k=0;
2385         mask_a=0;
2386         emask_k=0;
2387         emask_a=0;
2388
2389         
2390
2391 #ifdef CIPHER_DEBUG
2392         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
2393                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
2394                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
2395 #endif
2396         
2397         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
2398         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2399                 mask_k |= SSL_kGOST;
2400                 mask_a |= SSL_aGOST01;
2401         }
2402         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
2403         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
2404                 mask_k |= SSL_kGOST;
2405                 mask_a |= SSL_aGOST94;
2406         }
2407
2408         if (rsa_enc || (rsa_tmp && rsa_sign))
2409                 mask_k|=SSL_kRSA;
2410         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
2411                 emask_k|=SSL_kRSA;
2412
2413 #if 0
2414         /* The match needs to be both kDHE and aRSA or aDSA, so don't worry */
2415         if (    (dh_tmp || dh_rsa || dh_dsa) &&
2416                 (rsa_enc || rsa_sign || dsa_sign))
2417                 mask_k|=SSL_kDHE;
2418         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
2419                 (rsa_enc || rsa_sign || dsa_sign))
2420                 emask_k|=SSL_kDHE;
2421 #endif
2422
2423         if (dh_tmp_export)
2424                 emask_k|=SSL_kDHE;
2425
2426         if (dh_tmp)
2427                 mask_k|=SSL_kDHE;
2428
2429         if (dh_rsa) mask_k|=SSL_kDHr;
2430         if (dh_rsa_export) emask_k|=SSL_kDHr;
2431
2432         if (dh_dsa) mask_k|=SSL_kDHd;
2433         if (dh_dsa_export) emask_k|=SSL_kDHd;
2434
2435         if (emask_k & (SSL_kDHr|SSL_kDHd))
2436                 mask_a |= SSL_aDH;
2437
2438         if (rsa_enc || rsa_sign)
2439                 {
2440                 mask_a|=SSL_aRSA;
2441                 emask_a|=SSL_aRSA;
2442                 }
2443
2444         if (dsa_sign)
2445                 {
2446                 mask_a|=SSL_aDSS;
2447                 emask_a|=SSL_aDSS;
2448                 }
2449
2450         mask_a|=SSL_aNULL;
2451         emask_a|=SSL_aNULL;
2452
2453 #ifndef OPENSSL_NO_KRB5
2454         mask_k|=SSL_kKRB5;
2455         mask_a|=SSL_aKRB5;
2456         emask_k|=SSL_kKRB5;
2457         emask_a|=SSL_aKRB5;
2458 #endif
2459
2460         /* An ECC certificate may be usable for ECDH and/or
2461          * ECDSA cipher suites depending on the key usage extension.
2462          */
2463 #ifndef OPENSSL_NO_EC
2464         if (have_ecc_cert)
2465                 {
2466                 cpk = &c->pkeys[SSL_PKEY_ECC];
2467                 x = cpk->x509;
2468                 /* This call populates extension flags (ex_flags) */
2469                 X509_check_purpose(x, -1, 0);
2470                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2471                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
2472                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
2473                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
2474                 if (!(cpk->valid_flags & CERT_PKEY_SIGN))
2475                         ecdsa_ok = 0;
2476                 ecc_pkey = X509_get_pubkey(x);
2477                 ecc_pkey_size = (ecc_pkey != NULL) ?
2478                     EVP_PKEY_bits(ecc_pkey) : 0;
2479                 EVP_PKEY_free(ecc_pkey);
2480                 if ((x->sig_alg) && (x->sig_alg->algorithm))
2481                         {
2482                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2483                         OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2484                         }
2485 #ifndef OPENSSL_NO_ECDH
2486                 if (ecdh_ok)
2487                         {
2488
2489                         if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
2490                                 {
2491                                 mask_k|=SSL_kECDHr;
2492                                 mask_a|=SSL_aECDH;
2493                                 if (ecc_pkey_size <= 163)
2494                                         {
2495                                         emask_k|=SSL_kECDHr;
2496                                         emask_a|=SSL_aECDH;
2497                                         }
2498                                 }
2499
2500                         if (pk_nid == NID_X9_62_id_ecPublicKey)
2501                                 {
2502                                 mask_k|=SSL_kECDHe;
2503                                 mask_a|=SSL_aECDH;
2504                                 if (ecc_pkey_size <= 163)
2505                                         {
2506                                         emask_k|=SSL_kECDHe;
2507                                         emask_a|=SSL_aECDH;
2508                                         }
2509                                 }
2510                         }
2511 #endif
2512 #ifndef OPENSSL_NO_ECDSA
2513                 if (ecdsa_ok)
2514                         {
2515                         mask_a|=SSL_aECDSA;
2516                         emask_a|=SSL_aECDSA;
2517                         }
2518 #endif
2519                 }
2520 #endif
2521
2522 #ifndef OPENSSL_NO_ECDH
2523         if (have_ecdh_tmp)
2524                 {
2525                 mask_k|=SSL_kECDHE;
2526                 emask_k|=SSL_kECDHE;
2527                 }
2528 #endif
2529
2530 #ifndef OPENSSL_NO_PSK
2531         mask_k |= SSL_kPSK;
2532         mask_a |= SSL_aPSK;
2533         emask_k |= SSL_kPSK;
2534         emask_a |= SSL_aPSK;
2535 #endif
2536
2537         c->mask_k=mask_k;
2538         c->mask_a=mask_a;
2539         c->export_mask_k=emask_k;
2540         c->export_mask_a=emask_a;
2541         c->valid=1;
2542         }
2543
2544 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
2545 #define ku_reject(x, usage) \
2546         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
2547
2548 #ifndef OPENSSL_NO_EC
2549
2550 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
2551         {
2552         unsigned long alg_k, alg_a;
2553         EVP_PKEY *pkey = NULL;
2554         int keysize = 0;
2555         int signature_nid = 0, md_nid = 0, pk_nid = 0;
2556         const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
2557
2558         alg_k = cs->algorithm_mkey;
2559         alg_a = cs->algorithm_auth;
2560
2561         if (SSL_C_IS_EXPORT(cs))
2562                 {
2563                 /* ECDH key length in export ciphers must be <= 163 bits */
2564                 pkey = X509_get_pubkey(x);
2565                 if (pkey == NULL) return 0;
2566                 keysize = EVP_PKEY_bits(pkey);
2567                 EVP_PKEY_free(pkey);
2568                 if (keysize > 163) return 0;
2569                 }
2570
2571         /* This call populates the ex_flags field correctly */
2572         X509_check_purpose(x, -1, 0);
2573         if ((x->sig_alg) && (x->sig_alg->algorithm))
2574                 {
2575                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
2576                 OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
2577                 }
2578         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
2579                 {
2580                 /* key usage, if present, must allow key agreement */
2581                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2582                         {
2583                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2584                         return 0;
2585                         }
2586                 if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
2587                         {
2588                         /* signature alg must be ECDSA */
2589                         if (pk_nid != NID_X9_62_id_ecPublicKey)
2590                                 {
2591                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2592                                 return 0;
2593                                 }
2594                         }
2595                 if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
2596                         {
2597                         /* signature alg must be RSA */
2598
2599                         if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
2600                                 {
2601                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2602                                 return 0;
2603                                 }
2604                         }
2605                 }
2606         if (alg_a & SSL_aECDSA)
2607                 {
2608                 /* key usage, if present, must allow signing */
2609                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2610                         {
2611                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2612                         return 0;
2613                         }
2614                 }
2615
2616         return 1;  /* all checks are ok */
2617         }
2618
2619 #endif
2620
2621 static int ssl_get_server_cert_index(const SSL *s)
2622         {
2623         int idx;
2624         idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
2625         if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
2626                 idx = SSL_PKEY_RSA_SIGN;
2627         if (idx == -1)
2628                 SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX,ERR_R_INTERNAL_ERROR);
2629         return idx;
2630         }
2631
2632 CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
2633         {
2634         CERT *c;
2635         int i;
2636
2637         c = s->cert;
2638         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2639
2640 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2641         /* Broken protocol test: return last used certificate: which may
2642          * mismatch the one expected.
2643          */
2644         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2645                 return c->key;
2646 #endif
2647
2648         i = ssl_get_server_cert_index(s);
2649
2650         /* This may or may not be an error. */
2651         if (i < 0)
2652                 return NULL;
2653
2654         /* May be NULL. */
2655         return &c->pkeys[i];
2656         }
2657
2658 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher, const EVP_MD **pmd)
2659         {
2660         unsigned long alg_a;
2661         CERT *c;
2662         int idx = -1;
2663
2664         alg_a = cipher->algorithm_auth;
2665         c=s->cert;
2666
2667 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
2668         /* Broken protocol test: use last key: which may
2669          * mismatch the one expected.
2670          */
2671         if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
2672                 idx = c->key - c->pkeys;
2673         else
2674 #endif
2675
2676         if ((alg_a & SSL_aDSS) &&
2677                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2678                 idx = SSL_PKEY_DSA_SIGN;
2679         else if (alg_a & SSL_aRSA)
2680                 {
2681                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2682                         idx = SSL_PKEY_RSA_SIGN;
2683                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2684                         idx = SSL_PKEY_RSA_ENC;
2685                 }
2686         else if ((alg_a & SSL_aECDSA) &&
2687                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2688                 idx = SSL_PKEY_ECC;
2689         if (idx == -1)
2690                 {
2691                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2692                 return(NULL);
2693                 }
2694         if (pmd)
2695                 *pmd = c->pkeys[idx].digest;
2696         return c->pkeys[idx].privatekey;
2697         }
2698
2699 #ifndef OPENSSL_NO_TLSEXT
2700 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
2701                                    size_t *serverinfo_length)
2702         {
2703         CERT *c = NULL;
2704         int i = 0;
2705         *serverinfo_length = 0;
2706
2707         c = s->cert;
2708         i = ssl_get_server_cert_index(s);
2709
2710         if (i == -1)
2711                 return 0;
2712         if (c->pkeys[i].serverinfo == NULL)
2713                 return 0;
2714
2715         *serverinfo = c->pkeys[i].serverinfo;
2716         *serverinfo_length = c->pkeys[i].serverinfo_length;
2717         return 1;
2718         }
2719 #endif
2720
2721 void ssl_update_cache(SSL *s,int mode)
2722         {
2723         int i;
2724
2725         /* If the session_id_length is 0, we are not supposed to cache it,
2726          * and it would be rather hard to do anyway :-) */
2727         if (s->session->session_id_length == 0) return;
2728
2729         i=s->session_ctx->session_cache_mode;
2730         if ((i & mode) && (!s->hit)
2731                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2732                     || SSL_CTX_add_session(s->session_ctx,s->session))
2733                 && (s->session_ctx->new_session_cb != NULL))
2734                 {
2735                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2736                 if (!s->session_ctx->new_session_cb(s,s->session))
2737                         SSL_SESSION_free(s->session);
2738                 }
2739
2740         /* auto flush every 255 connections */
2741         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2742                 ((i & mode) == mode))
2743                 {
2744                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2745                         ?s->session_ctx->stats.sess_connect_good
2746                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2747                         {
2748                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2749                         }
2750                 }
2751         }
2752
2753 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
2754         {
2755         return ctx->method;
2756         }
2757
2758 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2759         {
2760         return(s->method);
2761         }
2762
2763 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2764         {
2765         int conn= -1;
2766         int ret=1;
2767
2768         if (s->method != meth)
2769                 {
2770                 if (s->handshake_func != NULL)
2771                         conn=(s->handshake_func == s->method->ssl_connect);
2772
2773                 if (s->method->version == meth->version)
2774                         s->method=meth;
2775                 else
2776                         {
2777                         s->method->ssl_free(s);
2778                         s->method=meth;
2779                         ret=s->method->ssl_new(s);
2780                         }
2781
2782                 if (conn == 1)
2783                         s->handshake_func=meth->ssl_connect;
2784                 else if (conn == 0)
2785                         s->handshake_func=meth->ssl_accept;
2786                 }
2787         return(ret);
2788         }
2789
2790 int SSL_get_error(const SSL *s,int i)
2791         {
2792         int reason;
2793         unsigned long l;
2794         BIO *bio;
2795
2796         if (i > 0) return(SSL_ERROR_NONE);
2797
2798         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2799          * etc, where we do encode the error */
2800         if ((l=ERR_peek_error()) != 0)
2801                 {
2802                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2803                         return(SSL_ERROR_SYSCALL);
2804                 else
2805                         return(SSL_ERROR_SSL);
2806                 }
2807
2808         if ((i < 0) && SSL_want_read(s))
2809                 {
2810                 bio=SSL_get_rbio(s);
2811                 if (BIO_should_read(bio))
2812                         return(SSL_ERROR_WANT_READ);
2813                 else if (BIO_should_write(bio))
2814                         /* This one doesn't make too much sense ... We never try
2815                          * to write to the rbio, and an application program where
2816                          * rbio and wbio are separate couldn't even know what it
2817                          * should wait for.
2818                          * However if we ever set s->rwstate incorrectly
2819                          * (so that we have SSL_want_read(s) instead of
2820                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2821                          * this test works around that bug; so it might be safer
2822                          * to keep it. */
2823                         return(SSL_ERROR_WANT_WRITE);
2824                 else if (BIO_should_io_special(bio))
2825                         {
2826                         reason=BIO_get_retry_reason(bio);
2827                         if (reason == BIO_RR_CONNECT)
2828                                 return(SSL_ERROR_WANT_CONNECT);
2829                         else if (reason == BIO_RR_ACCEPT)
2830                                 return(SSL_ERROR_WANT_ACCEPT);
2831                         else
2832                                 return(SSL_ERROR_SYSCALL); /* unknown */
2833                         }
2834                 }
2835
2836         if ((i < 0) && SSL_want_write(s))
2837                 {
2838                 bio=SSL_get_wbio(s);
2839                 if (BIO_should_write(bio))
2840                         return(SSL_ERROR_WANT_WRITE);
2841                 else if (BIO_should_read(bio))
2842                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2843                         return(SSL_ERROR_WANT_READ);
2844                 else if (BIO_should_io_special(bio))
2845                         {
2846                         reason=BIO_get_retry_reason(bio);
2847                         if (reason == BIO_RR_CONNECT)
2848                                 return(SSL_ERROR_WANT_CONNECT);
2849                         else if (reason == BIO_RR_ACCEPT)
2850                                 return(SSL_ERROR_WANT_ACCEPT);
2851                         else
2852                                 return(SSL_ERROR_SYSCALL);
2853                         }
2854                 }
2855         if ((i < 0) && SSL_want_x509_lookup(s))
2856                 {
2857                 return(SSL_ERROR_WANT_X509_LOOKUP);
2858                 }
2859
2860         if (i == 0)
2861                 {
2862                 if (s->version == SSL2_VERSION)
2863                         {
2864                         /* assume it is the socket being closed */
2865                         return(SSL_ERROR_ZERO_RETURN);
2866                         }
2867                 else
2868                         {
2869                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2870                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2871                                 return(SSL_ERROR_ZERO_RETURN);
2872                         }
2873                 }
2874         return(SSL_ERROR_SYSCALL);
2875         }
2876
2877 int SSL_do_handshake(SSL *s)
2878         {
2879         int ret=1;
2880
2881         if (s->handshake_func == NULL)
2882                 {
2883                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2884                 return(-1);
2885                 }
2886
2887         s->method->ssl_renegotiate_check(s);
2888
2889         if (SSL_in_init(s) || SSL_in_before(s))
2890                 {
2891                 ret=s->handshake_func(s);
2892                 }
2893         return(ret);
2894         }
2895
2896 /* For the next 2 functions, SSL_clear() sets shutdown and so
2897  * one of these calls will reset it */
2898 void SSL_set_accept_state(SSL *s)
2899         {
2900         s->server=1;
2901         s->shutdown=0;
2902         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2903         s->handshake_func=s->method->ssl_accept;
2904         /* clear the current cipher */
2905         ssl_clear_cipher_ctx(s);
2906         ssl_clear_hash_ctx(&s->read_hash);
2907         ssl_clear_hash_ctx(&s->write_hash);
2908         }
2909
2910 void SSL_set_connect_state(SSL *s)
2911         {
2912         s->server=0;
2913         s->shutdown=0;
2914         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2915         s->handshake_func=s->method->ssl_connect;
2916         /* clear the current cipher */
2917         ssl_clear_cipher_ctx(s);
2918         ssl_clear_hash_ctx(&s->read_hash);
2919         ssl_clear_hash_ctx(&s->write_hash);
2920         }
2921
2922 int ssl_undefined_function(SSL *s)
2923         {
2924         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2925         return(0);
2926         }
2927
2928 int ssl_undefined_void_function(void)
2929         {
2930         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2931         return(0);
2932         }
2933
2934 int ssl_undefined_const_function(const SSL *s)
2935         {
2936         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2937         return(0);
2938         }
2939
2940 SSL_METHOD *ssl_bad_method(int ver)
2941         {
2942         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2943         return(NULL);
2944         }
2945
2946 const char *SSL_get_version(const SSL *s)
2947         {
2948         if (s->version == TLS1_2_VERSION)
2949                 return("TLSv1.2");
2950         else if (s->version == TLS1_1_VERSION)
2951                 return("TLSv1.1");
2952         else if (s->version == TLS1_VERSION)
2953                 return("TLSv1");
2954         else if (s->version == SSL3_VERSION)
2955                 return("SSLv3");
2956         else if (s->version == SSL2_VERSION)
2957                 return("SSLv2");
2958         else
2959                 return("unknown");
2960         }
2961
2962 SSL *SSL_dup(SSL *s)
2963         {
2964         STACK_OF(X509_NAME) *sk;
2965         X509_NAME *xn;
2966         SSL *ret;
2967         int i;
2968         
2969         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2970             return(NULL);
2971
2972         ret->version = s->version;
2973         ret->type = s->type;
2974         ret->method = s->method;
2975
2976         if (s->session != NULL)
2977                 {
2978                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2979                 SSL_copy_session_id(ret,s);
2980                 }
2981         else
2982                 {
2983                 /* No session has been established yet, so we have to expect
2984                  * that s->cert or ret->cert will be changed later --
2985                  * they should not both point to the same object,
2986                  * and thus we can't use SSL_copy_session_id. */
2987
2988                 ret->method->ssl_free(ret);
2989                 ret->method = s->method;
2990                 ret->method->ssl_new(ret);
2991
2992                 if (s->cert != NULL)
2993                         {
2994                         if (ret->cert != NULL)
2995                                 {
2996                                 ssl_cert_free(ret->cert);
2997                                 }
2998                         ret->cert = ssl_cert_dup(s->cert);
2999                         if (ret->cert == NULL)
3000                                 goto err;
3001                         }
3002                                 
3003                 SSL_set_session_id_context(ret,
3004                         s->sid_ctx, s->sid_ctx_length);
3005                 }
3006
3007         ret->options=s->options;
3008         ret->mode=s->mode;
3009         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
3010         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
3011         ret->msg_callback = s->msg_callback;
3012         ret->msg_callback_arg = s->msg_callback_arg;
3013         SSL_set_verify(ret,SSL_get_verify_mode(s),
3014                 SSL_get_verify_callback(s));
3015         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
3016         ret->generate_session_id = s->generate_session_id;
3017
3018         SSL_set_info_callback(ret,SSL_get_info_callback(s));
3019         
3020         ret->debug=s->debug;
3021
3022         /* copy app data, a little dangerous perhaps */
3023         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3024                 goto err;
3025
3026         /* setup rbio, and wbio */
3027         if (s->rbio != NULL)
3028                 {
3029                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
3030                         goto err;
3031                 }
3032         if (s->wbio != NULL)
3033                 {
3034                 if (s->wbio != s->rbio)
3035                         {
3036                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
3037                                 goto err;
3038                         }
3039                 else
3040                         ret->wbio=ret->rbio;
3041                 }
3042         ret->rwstate = s->rwstate;
3043         ret->in_handshake = s->in_handshake;
3044         ret->handshake_func = s->handshake_func;
3045         ret->server = s->server;
3046         ret->renegotiate = s->renegotiate;
3047         ret->new_session = s->new_session;
3048         ret->quiet_shutdown = s->quiet_shutdown;
3049         ret->shutdown=s->shutdown;
3050         ret->state=s->state; /* SSL_dup does not really work at any state, though */
3051         ret->rstate=s->rstate;
3052         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
3053         ret->hit=s->hit;
3054
3055         X509_VERIFY_PARAM_inherit(ret->param, s->param);
3056
3057         /* dup the cipher_list and cipher_list_by_id stacks */
3058         if (s->cipher_list != NULL)
3059                 {
3060                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3061                         goto err;
3062                 }
3063         if (s->cipher_list_by_id != NULL)
3064                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3065                         == NULL)
3066                         goto err;
3067
3068         /* Dup the client_CA list */
3069         if (s->client_CA != NULL)
3070                 {
3071                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
3072                 ret->client_CA=sk;
3073                 for (i=0; i<sk_X509_NAME_num(sk); i++)
3074                         {
3075                         xn=sk_X509_NAME_value(sk,i);
3076                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
3077                                 {
3078                                 X509_NAME_free(xn);
3079                                 goto err;
3080                                 }
3081                         }
3082                 }
3083
3084         if (0)
3085                 {
3086 err:
3087                 if (ret != NULL) SSL_free(ret);
3088                 ret=NULL;
3089                 }
3090         return(ret);
3091         }
3092
3093 void ssl_clear_cipher_ctx(SSL *s)
3094         {
3095         if (s->enc_read_ctx != NULL)
3096                 {
3097                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
3098                 OPENSSL_free(s->enc_read_ctx);
3099                 s->enc_read_ctx=NULL;
3100                 }
3101         if (s->enc_write_ctx != NULL)
3102                 {
3103                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
3104                 OPENSSL_free(s->enc_write_ctx);
3105                 s->enc_write_ctx=NULL;
3106                 }
3107 #ifndef OPENSSL_NO_COMP
3108         if (s->expand != NULL)
3109                 {
3110                 COMP_CTX_free(s->expand);
3111                 s->expand=NULL;
3112                 }
3113         if (s->compress != NULL)
3114                 {
3115                 COMP_CTX_free(s->compress);
3116                 s->compress=NULL;
3117                 }
3118 #endif
3119         }
3120
3121 X509 *SSL_get_certificate(const SSL *s)
3122         {
3123         if (s->cert != NULL)
3124                 return(s->cert->key->x509);
3125         else
3126                 return(NULL);
3127         }
3128
3129 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3130         {
3131         if (s->cert != NULL)
3132                 return(s->cert->key->privatekey);
3133         else
3134                 return(NULL);
3135         }
3136
3137 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3138         {
3139         if (ctx->cert != NULL)
3140                 return ctx->cert->key->x509;
3141         else
3142                 return NULL;
3143         }
3144
3145 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3146         {
3147         if (ctx->cert != NULL)
3148                 return ctx->cert->key->privatekey;
3149         else
3150                 return NULL ;
3151         }
3152
3153 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3154         {
3155         if ((s->session != NULL) && (s->session->cipher != NULL))
3156                 return(s->session->cipher);
3157         return(NULL);
3158         }
3159 #ifdef OPENSSL_NO_COMP
3160 const void *SSL_get_current_compression(SSL *s)
3161         {
3162         return NULL;
3163         }
3164 const void *SSL_get_current_expansion(SSL *s)
3165         {
3166         return NULL;
3167         }
3168 #else
3169
3170 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3171         {
3172         if (s->compress != NULL)
3173                 return(s->compress->meth);
3174         return(NULL);
3175         }
3176
3177 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3178         {
3179         if (s->expand != NULL)
3180                 return(s->expand->meth);
3181         return(NULL);
3182         }
3183 #endif
3184
3185 int ssl_init_wbio_buffer(SSL *s,int push)
3186         {
3187         BIO *bbio;
3188
3189         if (s->bbio == NULL)
3190                 {
3191                 bbio=BIO_new(BIO_f_buffer());
3192                 if (bbio == NULL) return(0);
3193                 s->bbio=bbio;
3194                 }
3195         else
3196                 {
3197                 bbio=s->bbio;
3198                 if (s->bbio == s->wbio)
3199                         s->wbio=BIO_pop(s->wbio);
3200                 }
3201         (void)BIO_reset(bbio);
3202 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
3203         if (!BIO_set_read_buffer_size(bbio,1))
3204                 {
3205                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
3206                 return(0);
3207                 }
3208         if (push)
3209                 {
3210                 if (s->wbio != bbio)
3211                         s->wbio=BIO_push(bbio,s->wbio);
3212                 }
3213         else
3214                 {
3215                 if (s->wbio == bbio)
3216                         s->wbio=BIO_pop(bbio);
3217                 }
3218         return(1);
3219         }
3220
3221 void ssl_free_wbio_buffer(SSL *s)
3222         {
3223         if (s->bbio == NULL) return;
3224
3225         if (s->bbio == s->wbio)
3226                 {
3227                 /* remove buffering */
3228                 s->wbio=BIO_pop(s->wbio);
3229 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
3230                 assert(s->wbio != NULL);
3231 #endif
3232         }
3233         BIO_free(s->bbio);
3234         s->bbio=NULL;
3235         }
3236         
3237 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
3238         {
3239         ctx->quiet_shutdown=mode;
3240         }
3241
3242 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3243         {
3244         return(ctx->quiet_shutdown);
3245         }
3246
3247 void SSL_set_quiet_shutdown(SSL *s,int mode)
3248         {
3249         s->quiet_shutdown=mode;
3250         }
3251
3252 int SSL_get_quiet_shutdown(const SSL *s)
3253         {
3254         return(s->quiet_shutdown);
3255         }
3256
3257 void SSL_set_shutdown(SSL *s,int mode)
3258         {
3259         s->shutdown=mode;
3260         }
3261
3262 int SSL_get_shutdown(const SSL *s)
3263         {
3264         return(s->shutdown);
3265         }
3266
3267 int SSL_version(const SSL *s)
3268         {
3269         return(s->version);
3270         }
3271
3272 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3273         {
3274         return(ssl->ctx);
3275         }
3276
3277 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
3278         {
3279         if (ssl->ctx == ctx)
3280                 return ssl->ctx;
3281 #ifndef OPENSSL_NO_TLSEXT
3282         if (ctx == NULL)
3283                 ctx = ssl->initial_ctx;
3284 #endif
3285         if (ssl->cert != NULL)
3286                 ssl_cert_free(ssl->cert);
3287         ssl->cert = ssl_cert_dup(ctx->cert);
3288         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
3289         if (ssl->ctx != NULL)
3290                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3291         ssl->ctx = ctx;
3292         return(ssl->ctx);
3293         }
3294
3295 #ifndef OPENSSL_NO_STDIO
3296 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3297         {
3298         return(X509_STORE_set_default_paths(ctx->cert_store));
3299         }
3300
3301 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3302                 const char *CApath)
3303         {
3304         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
3305         }
3306 #endif
3307
3308 void SSL_set_info_callback(SSL *ssl,
3309         void (*cb)(const SSL *ssl,int type,int val))
3310         {
3311         ssl->info_callback=cb;
3312         }
3313
3314 /* One compiler (Diab DCC) doesn't like argument names in returned
3315    function pointer.  */
3316 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
3317         {
3318         return ssl->info_callback;
3319         }
3320
3321 int SSL_state(const SSL *ssl)
3322         {
3323         return(ssl->state);
3324         }
3325
3326 void SSL_set_state(SSL *ssl, int state)
3327         {
3328         ssl->state = state;
3329         }
3330
3331 void SSL_set_verify_result(SSL *ssl,long arg)
3332         {
3333         ssl->verify_result=arg;
3334         }
3335
3336 long SSL_get_verify_result(const SSL *ssl)
3337         {
3338         return(ssl->verify_result);
3339         }
3340
3341 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3342                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3343         {
3344         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
3345                                 new_func, dup_func, free_func);
3346         }
3347
3348 int SSL_set_ex_data(SSL *s,int idx,void *arg)
3349         {
3350         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3351         }
3352
3353 void *SSL_get_ex_data(const SSL *s,int idx)
3354         {
3355         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3356         }
3357
3358 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
3359                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
3360         {
3361         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
3362                                 new_func, dup_func, free_func);
3363         }
3364
3365 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
3366         {
3367         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
3368         }
3369
3370 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
3371         {
3372         return(CRYPTO_get_ex_data(&s->ex_data,idx));
3373         }
3374
3375 int ssl_ok(SSL *s)
3376         {
3377         return(1);
3378         }
3379
3380 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3381         {
3382         return(ctx->cert_store);
3383         }
3384
3385 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
3386         {
3387         if (ctx->cert_store != NULL)
3388                 X509_STORE_free(ctx->cert_store);
3389         ctx->cert_store=store;
3390         }
3391
3392 int SSL_want(const SSL *s)
3393         {
3394         return(s->rwstate);
3395         }
3396
3397 /*!
3398  * \brief Set the callback for generating temporary RSA keys.
3399  * \param ctx the SSL context.
3400  * \param cb the callback
3401  */
3402
3403 #ifndef OPENSSL_NO_RSA
3404 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
3405                                                           int is_export,
3406                                                           int keylength))
3407     {
3408     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3409     }
3410
3411 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
3412                                                   int is_export,
3413                                                   int keylength))
3414     {
3415     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
3416     }
3417 #endif
3418
3419 #ifdef DOXYGEN
3420 /*!
3421  * \brief The RSA temporary key callback function.
3422  * \param ssl the SSL session.
3423  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
3424  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
3425  * of the required key in bits.
3426  * \return the temporary RSA key.
3427  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
3428  */
3429
3430 RSA *cb(SSL *ssl,int is_export,int keylength)
3431     {}
3432 #endif
3433
3434 /*!
3435  * \brief Set the callback for generating temporary DH keys.
3436  * \param ctx the SSL context.
3437  * \param dh the callback
3438  */
3439
3440 #ifndef OPENSSL_NO_DH
3441 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
3442                                                         int keylength))
3443         {
3444         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3445         }
3446
3447 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
3448                                                 int keylength))
3449         {
3450         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
3451         }
3452 #endif
3453
3454 #ifndef OPENSSL_NO_ECDH
3455 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3456                                                                 int keylength))
3457         {
3458         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3459         }
3460
3461 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
3462                                                         int keylength))
3463         {
3464         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
3465         }
3466 #endif
3467
3468 #ifndef OPENSSL_NO_PSK
3469 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3470         {
3471         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3472                 {
3473                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3474                 return 0;
3475                 }
3476         if (ctx->psk_identity_hint != NULL)
3477                 OPENSSL_free(ctx->psk_identity_hint);
3478         if (identity_hint != NULL)
3479                 {
3480                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
3481                 if (ctx->psk_identity_hint == NULL)
3482                         return 0;
3483                 }
3484         else
3485                 ctx->psk_identity_hint = NULL;
3486         return 1;
3487         }
3488
3489 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3490         {
3491         if (s == NULL)
3492                 return 0;
3493
3494         if (s->session == NULL)
3495                 return 1; /* session not created yet, ignored */
3496
3497         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
3498                 {
3499                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3500                 return 0;
3501                 }
3502         if (s->session->psk_identity_hint != NULL)
3503                 OPENSSL_free(s->session->psk_identity_hint);
3504         if (identity_hint != NULL)
3505                 {
3506                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
3507                 if (s->session->psk_identity_hint == NULL)
3508                         return 0;
3509                 }
3510         else
3511                 s->session->psk_identity_hint = NULL;
3512         return 1;
3513         }
3514
3515 const char *SSL_get_psk_identity_hint(const SSL *s)
3516         {
3517         if (s == NULL || s->session == NULL)