803894c44f968b82e22e4dfd9592256db913c588
[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         };
181
182 int SSL_clear(SSL *s)
183         {
184
185         if (s->method == NULL)
186                 {
187                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
188                 return(0);
189                 }
190
191         if (ssl_clear_bad_session(s))
192                 {
193                 SSL_SESSION_free(s->session);
194                 s->session=NULL;
195                 }
196
197         s->error=0;
198         s->hit=0;
199         s->shutdown=0;
200
201 #if 0 /* Disabled since version 1.10 of this file (early return not
202        * needed because SSL_clear is not called when doing renegotiation) */
203         /* This is set if we are doing dynamic renegotiation so keep
204          * the old cipher.  It is sort of a SSL_clear_lite :-) */
205         if (s->new_session) return(1);
206 #else
207         if (s->new_session)
208                 {
209                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
210                 return 0;
211                 }
212 #endif
213
214         s->type=0;
215
216         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
217
218         s->version=s->method->version;
219         s->client_version=s->version;
220         s->rwstate=SSL_NOTHING;
221         s->rstate=SSL_ST_READ_HEADER;
222 #if 0
223         s->read_ahead=s->ctx->read_ahead;
224 #endif
225
226         if (s->init_buf != NULL)
227                 {
228                 BUF_MEM_free(s->init_buf);
229                 s->init_buf=NULL;
230                 }
231
232         ssl_clear_cipher_ctx(s);
233         ssl_clear_hash_ctx(&s->read_hash);
234         ssl_clear_hash_ctx(&s->write_hash);
235
236         s->first_packet=0;
237
238 #if 1
239         /* Check to see if we were changed into a different method, if
240          * so, revert back if we are not doing session-id reuse. */
241         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
242                 {
243                 s->method->ssl_free(s);
244                 s->method=s->ctx->method;
245                 if (!s->method->ssl_new(s))
246                         return(0);
247                 }
248         else
249 #endif
250                 s->method->ssl_clear(s);
251         return(1);
252         }
253
254 /** Used to change an SSL_CTXs default SSL method type */
255 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
256         {
257         STACK_OF(SSL_CIPHER) *sk;
258
259         ctx->method=meth;
260
261         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
262                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
263         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
264                 {
265                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
266                 return(0);
267                 }
268         return(1);
269         }
270
271 SSL *SSL_new(SSL_CTX *ctx)
272         {
273         SSL *s;
274
275         if (ctx == NULL)
276                 {
277                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
278                 return(NULL);
279                 }
280         if (ctx->method == NULL)
281                 {
282                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
283                 return(NULL);
284                 }
285
286         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
287         if (s == NULL) goto err;
288         memset(s,0,sizeof(SSL));
289
290 #ifndef OPENSSL_NO_KRB5
291         s->kssl_ctx = kssl_ctx_new();
292 #endif  /* OPENSSL_NO_KRB5 */
293
294         s->options=ctx->options;
295         s->mode=ctx->mode;
296         s->max_cert_list=ctx->max_cert_list;
297
298         if (ctx->cert != NULL)
299                 {
300                 /* Earlier library versions used to copy the pointer to
301                  * the CERT, not its contents; only when setting new
302                  * parameters for the per-SSL copy, ssl_cert_new would be
303                  * called (and the direct reference to the per-SSL_CTX
304                  * settings would be lost, but those still were indirectly
305                  * accessed for various purposes, and for that reason they
306                  * used to be known as s->ctx->default_cert).
307                  * Now we don't look at the SSL_CTX's CERT after having
308                  * duplicated it once. */
309
310                 s->cert = ssl_cert_dup(ctx->cert);
311                 if (s->cert == NULL)
312                         goto err;
313                 }
314         else
315                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
316
317         s->read_ahead=ctx->read_ahead;
318         s->msg_callback=ctx->msg_callback;
319         s->msg_callback_arg=ctx->msg_callback_arg;
320         s->verify_mode=ctx->verify_mode;
321 #if 0
322         s->verify_depth=ctx->verify_depth;
323 #endif
324         s->sid_ctx_length=ctx->sid_ctx_length;
325         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
326         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
327         s->verify_callback=ctx->default_verify_callback;
328         s->generate_session_id=ctx->generate_session_id;
329
330         s->param = X509_VERIFY_PARAM_new();
331         if (!s->param)
332                 goto err;
333         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
334 #if 0
335         s->purpose = ctx->purpose;
336         s->trust = ctx->trust;
337 #endif
338         s->quiet_shutdown=ctx->quiet_shutdown;
339         s->max_send_fragment = ctx->max_send_fragment;
340
341         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
342         s->ctx=ctx;
343 #ifndef OPENSSL_NO_TLSEXT
344         s->tlsext_debug_cb = 0;
345         s->tlsext_debug_arg = NULL;
346         s->tlsext_ticket_expected = 0;
347         s->tlsext_status_type = -1;
348         s->tlsext_status_expected = 0;
349         s->tlsext_ocsp_ids = NULL;
350         s->tlsext_ocsp_exts = NULL;
351         s->tlsext_ocsp_resp = NULL;
352         s->tlsext_ocsp_resplen = -1;
353         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
354         s->initial_ctx=ctx;
355 #endif
356
357         s->verify_result=X509_V_OK;
358
359         s->method=ctx->method;
360
361         if (!s->method->ssl_new(s))
362                 goto err;
363
364         s->references=1;
365         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
366
367         SSL_clear(s);
368
369         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
370
371 #ifndef OPENSSL_NO_PSK
372         s->psk_client_callback=ctx->psk_client_callback;
373         s->psk_server_callback=ctx->psk_server_callback;
374 #endif
375
376         return(s);
377 err:
378         if (s != NULL)
379                 {
380                 if (s->cert != NULL)
381                         ssl_cert_free(s->cert);
382                 if (s->ctx != NULL)
383                         SSL_CTX_free(s->ctx); /* decrement reference count */
384                 OPENSSL_free(s);
385                 }
386         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
387         return(NULL);
388         }
389
390 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
391                                    unsigned int sid_ctx_len)
392     {
393     if(sid_ctx_len > sizeof ctx->sid_ctx)
394         {
395         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
396         return 0;
397         }
398     ctx->sid_ctx_length=sid_ctx_len;
399     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
400
401     return 1;
402     }
403
404 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
405                                unsigned int sid_ctx_len)
406     {
407     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
408         {
409         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
410         return 0;
411         }
412     ssl->sid_ctx_length=sid_ctx_len;
413     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
414
415     return 1;
416     }
417
418 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
419         {
420         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
421         ctx->generate_session_id = cb;
422         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
423         return 1;
424         }
425
426 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
427         {
428         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
429         ssl->generate_session_id = cb;
430         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
431         return 1;
432         }
433
434 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
435                                 unsigned int id_len)
436         {
437         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
438          * we can "construct" a session to give us the desired check - ie. to
439          * find if there's a session in the hash table that would conflict with
440          * any new session built out of this id/id_len and the ssl_version in
441          * use by this SSL. */
442         SSL_SESSION r, *p;
443
444         if(id_len > sizeof r.session_id)
445                 return 0;
446
447         r.ssl_version = ssl->version;
448         r.session_id_length = id_len;
449         memcpy(r.session_id, id, id_len);
450         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
451          * callback is calling us to check the uniqueness of a shorter ID, it
452          * must be compared as a padded-out ID because that is what it will be
453          * converted to when the callback has finished choosing it. */
454         if((r.ssl_version == SSL2_VERSION) &&
455                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
456                 {
457                 memset(r.session_id + id_len, 0,
458                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
459                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
460                 }
461
462         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
463         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
464         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
465         return (p != NULL);
466         }
467
468 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
469         {
470         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
471         }
472
473 int SSL_set_purpose(SSL *s, int purpose)
474         {
475         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
476         }
477
478 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
479         {
480         return X509_VERIFY_PARAM_set_trust(s->param, trust);
481         }
482
483 int SSL_set_trust(SSL *s, int trust)
484         {
485         return X509_VERIFY_PARAM_set_trust(s->param, trust);
486         }
487
488 void SSL_free(SSL *s)
489         {
490         int i;
491
492         if(s == NULL)
493             return;
494
495         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
496 #ifdef REF_PRINT
497         REF_PRINT("SSL",s);
498 #endif
499         if (i > 0) return;
500 #ifdef REF_CHECK
501         if (i < 0)
502                 {
503                 fprintf(stderr,"SSL_free, bad reference count\n");
504                 abort(); /* ok */
505                 }
506 #endif
507
508         if (s->param)
509                 X509_VERIFY_PARAM_free(s->param);
510
511         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
512
513         if (s->bbio != NULL)
514                 {
515                 /* If the buffering BIO is in place, pop it off */
516                 if (s->bbio == s->wbio)
517                         {
518                         s->wbio=BIO_pop(s->wbio);
519                         }
520                 BIO_free(s->bbio);
521                 s->bbio=NULL;
522                 }
523         if (s->rbio != NULL)
524                 BIO_free_all(s->rbio);
525         if ((s->wbio != NULL) && (s->wbio != s->rbio))
526                 BIO_free_all(s->wbio);
527
528         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
529
530         /* add extra stuff */
531         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
532         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
533
534         /* Make the next call work :-) */
535         if (s->session != NULL)
536                 {
537                 ssl_clear_bad_session(s);
538                 SSL_SESSION_free(s->session);
539                 }
540
541         ssl_clear_cipher_ctx(s);
542         ssl_clear_hash_ctx(&s->read_hash);
543         ssl_clear_hash_ctx(&s->write_hash);
544
545         if (s->cert != NULL) ssl_cert_free(s->cert);
546         /* Free up if allocated */
547
548         if (s->ctx) SSL_CTX_free(s->ctx);
549 #ifndef OPENSSL_NO_TLSEXT
550         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
551 #ifndef OPENSSL_NO_EC
552         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
553         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
554 #endif /* OPENSSL_NO_EC */
555         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
556         if (s->tlsext_ocsp_exts)
557                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
558                                                 X509_EXTENSION_free);
559         if (s->tlsext_ocsp_ids)
560                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
561         if (s->tlsext_ocsp_resp)
562                 OPENSSL_free(s->tlsext_ocsp_resp);
563 #endif
564
565         if (s->client_CA != NULL)
566                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
567
568         if (s->method != NULL) s->method->ssl_free(s);
569
570 #ifndef OPENSSL_NO_KRB5
571         if (s->kssl_ctx != NULL)
572                 kssl_ctx_free(s->kssl_ctx);
573 #endif  /* OPENSSL_NO_KRB5 */
574
575         OPENSSL_free(s);
576         }
577
578 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
579         {
580         /* If the output buffering BIO is still in place, remove it
581          */
582         if (s->bbio != NULL)
583                 {
584                 if (s->wbio == s->bbio)
585                         {
586                         s->wbio=s->wbio->next_bio;
587                         s->bbio->next_bio=NULL;
588                         }
589                 }
590         if ((s->rbio != NULL) && (s->rbio != rbio))
591                 BIO_free_all(s->rbio);
592         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
593                 BIO_free_all(s->wbio);
594         s->rbio=rbio;
595         s->wbio=wbio;
596         }
597
598 BIO *SSL_get_rbio(const SSL *s)
599         { return(s->rbio); }
600
601 BIO *SSL_get_wbio(const SSL *s)
602         { return(s->wbio); }
603
604 int SSL_get_fd(const SSL *s)
605         {
606         return(SSL_get_rfd(s));
607         }
608
609 int SSL_get_rfd(const SSL *s)
610         {
611         int ret= -1;
612         BIO *b,*r;
613
614         b=SSL_get_rbio(s);
615         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
616         if (r != NULL)
617                 BIO_get_fd(r,&ret);
618         return(ret);
619         }
620
621 int SSL_get_wfd(const SSL *s)
622         {
623         int ret= -1;
624         BIO *b,*r;
625
626         b=SSL_get_wbio(s);
627         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
628         if (r != NULL)
629                 BIO_get_fd(r,&ret);
630         return(ret);
631         }
632
633 #ifndef OPENSSL_NO_SOCK
634 int SSL_set_fd(SSL *s,int fd)
635         {
636         int ret=0;
637         BIO *bio=NULL;
638
639         bio=BIO_new(BIO_s_socket());
640
641         if (bio == NULL)
642                 {
643                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
644                 goto err;
645                 }
646         BIO_set_fd(bio,fd,BIO_NOCLOSE);
647         SSL_set_bio(s,bio,bio);
648         ret=1;
649 err:
650         return(ret);
651         }
652
653 int SSL_set_wfd(SSL *s,int fd)
654         {
655         int ret=0;
656         BIO *bio=NULL;
657
658         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
659                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
660                 {
661                 bio=BIO_new(BIO_s_socket());
662
663                 if (bio == NULL)
664                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
665                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
666                 SSL_set_bio(s,SSL_get_rbio(s),bio);
667                 }
668         else
669                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
670         ret=1;
671 err:
672         return(ret);
673         }
674
675 int SSL_set_rfd(SSL *s,int fd)
676         {
677         int ret=0;
678         BIO *bio=NULL;
679
680         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
681                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
682                 {
683                 bio=BIO_new(BIO_s_socket());
684
685                 if (bio == NULL)
686                         {
687                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
688                         goto err;
689                         }
690                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
691                 SSL_set_bio(s,bio,SSL_get_wbio(s));
692                 }
693         else
694                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
695         ret=1;
696 err:
697         return(ret);
698         }
699 #endif
700
701
702 /* return length of latest Finished message we sent, copy to 'buf' */
703 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
704         {
705         size_t ret = 0;
706         
707         if (s->s3 != NULL)
708                 {
709                 ret = s->s3->tmp.finish_md_len;
710                 if (count > ret)
711                         count = ret;
712                 memcpy(buf, s->s3->tmp.finish_md, count);
713                 }
714         return ret;
715         }
716
717 /* return length of latest Finished message we expected, copy to 'buf' */
718 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
719         {
720         size_t ret = 0;
721         
722         if (s->s3 != NULL)
723                 {
724                 ret = s->s3->tmp.peer_finish_md_len;
725                 if (count > ret)
726                         count = ret;
727                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
728                 }
729         return ret;
730         }
731
732
733 int SSL_get_verify_mode(const SSL *s)
734         {
735         return(s->verify_mode);
736         }
737
738 int SSL_get_verify_depth(const SSL *s)
739         {
740         return X509_VERIFY_PARAM_get_depth(s->param);
741         }
742
743 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
744         {
745         return(s->verify_callback);
746         }
747
748 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
749         {
750         return(ctx->verify_mode);
751         }
752
753 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
754         {
755         return X509_VERIFY_PARAM_get_depth(ctx->param);
756         }
757
758 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
759         {
760         return(ctx->default_verify_callback);
761         }
762
763 void SSL_set_verify(SSL *s,int mode,
764                     int (*callback)(int ok,X509_STORE_CTX *ctx))
765         {
766         s->verify_mode=mode;
767         if (callback != NULL)
768                 s->verify_callback=callback;
769         }
770
771 void SSL_set_verify_depth(SSL *s,int depth)
772         {
773         X509_VERIFY_PARAM_set_depth(s->param, depth);
774         }
775
776 void SSL_set_read_ahead(SSL *s,int yes)
777         {
778         s->read_ahead=yes;
779         }
780
781 int SSL_get_read_ahead(const SSL *s)
782         {
783         return(s->read_ahead);
784         }
785
786 int SSL_pending(const SSL *s)
787         {
788         /* SSL_pending cannot work properly if read-ahead is enabled
789          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
790          * and it is impossible to fix since SSL_pending cannot report
791          * errors that may be observed while scanning the new data.
792          * (Note that SSL_pending() is often used as a boolean value,
793          * so we'd better not return -1.)
794          */
795         return(s->method->ssl_pending(s));
796         }
797
798 X509 *SSL_get_peer_certificate(const SSL *s)
799         {
800         X509 *r;
801         
802         if ((s == NULL) || (s->session == NULL))
803                 r=NULL;
804         else
805                 r=s->session->peer;
806
807         if (r == NULL) return(r);
808
809         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
810
811         return(r);
812         }
813
814 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
815         {
816         STACK_OF(X509) *r;
817         
818         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
819                 r=NULL;
820         else
821                 r=s->session->sess_cert->cert_chain;
822
823         /* If we are a client, cert_chain includes the peer's own
824          * certificate; if we are a server, it does not. */
825         
826         return(r);
827         }
828
829 /* Now in theory, since the calling process own 't' it should be safe to
830  * modify.  We need to be able to read f without being hassled */
831 void SSL_copy_session_id(SSL *t,const SSL *f)
832         {
833         CERT *tmp;
834
835         /* Do we need to to SSL locking? */
836         SSL_set_session(t,SSL_get_session(f));
837
838         /* what if we are setup as SSLv2 but want to talk SSLv3 or
839          * vice-versa */
840         if (t->method != f->method)
841                 {
842                 t->method->ssl_free(t); /* cleanup current */
843                 t->method=f->method;    /* change method */
844                 t->method->ssl_new(t);  /* setup new */
845                 }
846
847         tmp=t->cert;
848         if (f->cert != NULL)
849                 {
850                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
851                 t->cert=f->cert;
852                 }
853         else
854                 t->cert=NULL;
855         if (tmp != NULL) ssl_cert_free(tmp);
856         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
857         }
858
859 /* Fix this so it checks all the valid key/cert options */
860 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
861         {
862         if (    (ctx == NULL) ||
863                 (ctx->cert == NULL) ||
864                 (ctx->cert->key->x509 == NULL))
865                 {
866                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
867                 return(0);
868                 }
869         if      (ctx->cert->key->privatekey == NULL)
870                 {
871                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
872                 return(0);
873                 }
874         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
875         }
876
877 /* Fix this function so that it takes an optional type parameter */
878 int SSL_check_private_key(const SSL *ssl)
879         {
880         if (ssl == NULL)
881                 {
882                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
883                 return(0);
884                 }
885         if (ssl->cert == NULL)
886                 {
887                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
888                 return 0;
889                 }
890         if (ssl->cert->key->x509 == NULL)
891                 {
892                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
893                 return(0);
894                 }
895         if (ssl->cert->key->privatekey == NULL)
896                 {
897                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
898                 return(0);
899                 }
900         return(X509_check_private_key(ssl->cert->key->x509,
901                 ssl->cert->key->privatekey));
902         }
903
904 int SSL_accept(SSL *s)
905         {
906         if (s->handshake_func == 0)
907                 /* Not properly initialized yet */
908                 SSL_set_accept_state(s);
909
910         return(s->method->ssl_accept(s));
911         }
912
913 int SSL_connect(SSL *s)
914         {
915         if (s->handshake_func == 0)
916                 /* Not properly initialized yet */
917                 SSL_set_connect_state(s);
918
919         return(s->method->ssl_connect(s));
920         }
921
922 long SSL_get_default_timeout(const SSL *s)
923         {
924         return(s->method->get_timeout());
925         }
926
927 int SSL_read(SSL *s,void *buf,int num)
928         {
929         if (s->handshake_func == 0)
930                 {
931                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
932                 return -1;
933                 }
934
935         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
936                 {
937                 s->rwstate=SSL_NOTHING;
938                 return(0);
939                 }
940         return(s->method->ssl_read(s,buf,num));
941         }
942
943 int SSL_peek(SSL *s,void *buf,int num)
944         {
945         if (s->handshake_func == 0)
946                 {
947                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
948                 return -1;
949                 }
950
951         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
952                 {
953                 return(0);
954                 }
955         return(s->method->ssl_peek(s,buf,num));
956         }
957
958 int SSL_write(SSL *s,const void *buf,int num)
959         {
960         if (s->handshake_func == 0)
961                 {
962                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
963                 return -1;
964                 }
965
966         if (s->shutdown & SSL_SENT_SHUTDOWN)
967                 {
968                 s->rwstate=SSL_NOTHING;
969                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
970                 return(-1);
971                 }
972         return(s->method->ssl_write(s,buf,num));
973         }
974
975 int SSL_shutdown(SSL *s)
976         {
977         /* Note that this function behaves differently from what one might
978          * expect.  Return values are 0 for no success (yet),
979          * 1 for success; but calling it once is usually not enough,
980          * even if blocking I/O is used (see ssl3_shutdown).
981          */
982
983         if (s->handshake_func == 0)
984                 {
985                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
986                 return -1;
987                 }
988
989         if ((s != NULL) && !SSL_in_init(s))
990                 return(s->method->ssl_shutdown(s));
991         else
992                 return(1);
993         }
994
995 int SSL_renegotiate(SSL *s)
996         {
997         if (s->new_session == 0)
998                 {
999                 s->new_session=1;
1000                 }
1001         return(s->method->ssl_renegotiate(s));
1002         }
1003
1004 int SSL_renegotiate_pending(SSL *s)
1005         {
1006         /* becomes true when negotiation is requested;
1007          * false again once a handshake has finished */
1008         return (s->new_session != 0);
1009         }
1010
1011 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1012         {
1013         long l;
1014
1015         switch (cmd)
1016                 {
1017         case SSL_CTRL_GET_READ_AHEAD:
1018                 return(s->read_ahead);
1019         case SSL_CTRL_SET_READ_AHEAD:
1020                 l=s->read_ahead;
1021                 s->read_ahead=larg;
1022                 return(l);
1023
1024         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1025                 s->msg_callback_arg = parg;
1026                 return 1;
1027
1028         case SSL_CTRL_OPTIONS:
1029                 return(s->options|=larg);
1030         case SSL_CTRL_MODE:
1031                 return(s->mode|=larg);
1032         case SSL_CTRL_GET_MAX_CERT_LIST:
1033                 return(s->max_cert_list);
1034         case SSL_CTRL_SET_MAX_CERT_LIST:
1035                 l=s->max_cert_list;
1036                 s->max_cert_list=larg;
1037                 return(l);
1038         case SSL_CTRL_SET_MTU:
1039                 if (SSL_version(s) == DTLS1_VERSION)
1040                         {
1041                         s->d1->mtu = larg;
1042                         return larg;
1043                         }
1044                 return 0;
1045         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1046                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1047                         return 0;
1048                 s->max_send_fragment = larg;
1049                 return 1;
1050         default:
1051                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1052                 }
1053         }
1054
1055 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1056         {
1057         switch(cmd)
1058                 {
1059         case SSL_CTRL_SET_MSG_CALLBACK:
1060                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1061                 return 1;
1062                 
1063         default:
1064                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1065                 }
1066         }
1067
1068 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1069         {
1070         return ctx->sessions;
1071         }
1072
1073 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1074         {
1075         long l;
1076
1077         switch (cmd)
1078                 {
1079         case SSL_CTRL_GET_READ_AHEAD:
1080                 return(ctx->read_ahead);
1081         case SSL_CTRL_SET_READ_AHEAD:
1082                 l=ctx->read_ahead;
1083                 ctx->read_ahead=larg;
1084                 return(l);
1085                 
1086         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1087                 ctx->msg_callback_arg = parg;
1088                 return 1;
1089
1090         case SSL_CTRL_GET_MAX_CERT_LIST:
1091                 return(ctx->max_cert_list);
1092         case SSL_CTRL_SET_MAX_CERT_LIST:
1093                 l=ctx->max_cert_list;
1094                 ctx->max_cert_list=larg;
1095                 return(l);
1096
1097         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1098                 l=ctx->session_cache_size;
1099                 ctx->session_cache_size=larg;
1100                 return(l);
1101         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1102                 return(ctx->session_cache_size);
1103         case SSL_CTRL_SET_SESS_CACHE_MODE:
1104                 l=ctx->session_cache_mode;
1105                 ctx->session_cache_mode=larg;
1106                 return(l);
1107         case SSL_CTRL_GET_SESS_CACHE_MODE:
1108                 return(ctx->session_cache_mode);
1109
1110         case SSL_CTRL_SESS_NUMBER:
1111                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1112         case SSL_CTRL_SESS_CONNECT:
1113                 return(ctx->stats.sess_connect);
1114         case SSL_CTRL_SESS_CONNECT_GOOD:
1115                 return(ctx->stats.sess_connect_good);
1116         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1117                 return(ctx->stats.sess_connect_renegotiate);
1118         case SSL_CTRL_SESS_ACCEPT:
1119                 return(ctx->stats.sess_accept);
1120         case SSL_CTRL_SESS_ACCEPT_GOOD:
1121                 return(ctx->stats.sess_accept_good);
1122         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1123                 return(ctx->stats.sess_accept_renegotiate);
1124         case SSL_CTRL_SESS_HIT:
1125                 return(ctx->stats.sess_hit);
1126         case SSL_CTRL_SESS_CB_HIT:
1127                 return(ctx->stats.sess_cb_hit);
1128         case SSL_CTRL_SESS_MISSES:
1129                 return(ctx->stats.sess_miss);
1130         case SSL_CTRL_SESS_TIMEOUTS:
1131                 return(ctx->stats.sess_timeout);
1132         case SSL_CTRL_SESS_CACHE_FULL:
1133                 return(ctx->stats.sess_cache_full);
1134         case SSL_CTRL_OPTIONS:
1135                 return(ctx->options|=larg);
1136         case SSL_CTRL_MODE:
1137                 return(ctx->mode|=larg);
1138         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1139                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1140                         return 0;
1141                 ctx->max_send_fragment = larg;
1142                 return 1;
1143         default:
1144                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1145                 }
1146         }
1147
1148 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1149         {
1150         switch(cmd)
1151                 {
1152         case SSL_CTRL_SET_MSG_CALLBACK:
1153                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1154                 return 1;
1155
1156         default:
1157                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1158                 }
1159         }
1160
1161 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1162         {
1163         long l;
1164
1165         l=a->id-b->id;
1166         if (l == 0L)
1167                 return(0);
1168         else
1169                 return((l > 0)?1:-1);
1170         }
1171
1172 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1173                         const SSL_CIPHER * const *bp)
1174         {
1175         long l;
1176
1177         l=(*ap)->id-(*bp)->id;
1178         if (l == 0L)
1179                 return(0);
1180         else
1181                 return((l > 0)?1:-1);
1182         }
1183
1184 /** return a STACK of the ciphers available for the SSL and in order of
1185  * preference */
1186 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1187         {
1188         if (s != NULL)
1189                 {
1190                 if (s->cipher_list != NULL)
1191                         {
1192                         return(s->cipher_list);
1193                         }
1194                 else if ((s->ctx != NULL) &&
1195                         (s->ctx->cipher_list != NULL))
1196                         {
1197                         return(s->ctx->cipher_list);
1198                         }
1199                 }
1200         return(NULL);
1201         }
1202
1203 /** return a STACK of the ciphers available for the SSL and in order of
1204  * algorithm id */
1205 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1206         {
1207         if (s != NULL)
1208                 {
1209                 if (s->cipher_list_by_id != NULL)
1210                         {
1211                         return(s->cipher_list_by_id);
1212                         }
1213                 else if ((s->ctx != NULL) &&
1214                         (s->ctx->cipher_list_by_id != NULL))
1215                         {
1216                         return(s->ctx->cipher_list_by_id);
1217                         }
1218                 }
1219         return(NULL);
1220         }
1221
1222 /** The old interface to get the same thing as SSL_get_ciphers() */
1223 const char *SSL_get_cipher_list(const SSL *s,int n)
1224         {
1225         SSL_CIPHER *c;
1226         STACK_OF(SSL_CIPHER) *sk;
1227
1228         if (s == NULL) return(NULL);
1229         sk=SSL_get_ciphers(s);
1230         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1231                 return(NULL);
1232         c=sk_SSL_CIPHER_value(sk,n);
1233         if (c == NULL) return(NULL);
1234         return(c->name);
1235         }
1236
1237 /** specify the ciphers to be used by default by the SSL_CTX */
1238 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1239         {
1240         STACK_OF(SSL_CIPHER) *sk;
1241         
1242         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1243                 &ctx->cipher_list_by_id,str);
1244         /* ssl_create_cipher_list may return an empty stack if it
1245          * was unable to find a cipher matching the given rule string
1246          * (for example if the rule string specifies a cipher which
1247          * has been disabled). This is not an error as far as
1248          * ssl_create_cipher_list is concerned, and hence
1249          * ctx->cipher_list and ctx->cipher_list_by_id has been
1250          * updated. */
1251         if (sk == NULL)
1252                 return 0;
1253         else if (sk_SSL_CIPHER_num(sk) == 0)
1254                 {
1255                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1256                 return 0;
1257                 }
1258         return 1;
1259         }
1260
1261 /** specify the ciphers to be used by the SSL */
1262 int SSL_set_cipher_list(SSL *s,const char *str)
1263         {
1264         STACK_OF(SSL_CIPHER) *sk;
1265         
1266         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1267                 &s->cipher_list_by_id,str);
1268         /* see comment in SSL_CTX_set_cipher_list */
1269         if (sk == NULL)
1270                 return 0;
1271         else if (sk_SSL_CIPHER_num(sk) == 0)
1272                 {
1273                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1274                 return 0;
1275                 }
1276         return 1;
1277         }
1278
1279 /* works well for SSLv2, not so good for SSLv3 */
1280 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1281         {
1282         char *p;
1283         STACK_OF(SSL_CIPHER) *sk;
1284         SSL_CIPHER *c;
1285         int i;
1286
1287         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1288                 (len < 2))
1289                 return(NULL);
1290
1291         p=buf;
1292         sk=s->session->ciphers;
1293         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1294                 {
1295                 int n;
1296
1297                 c=sk_SSL_CIPHER_value(sk,i);
1298                 n=strlen(c->name);
1299                 if (n+1 > len)
1300                         {
1301                         if (p != buf)
1302                                 --p;
1303                         *p='\0';
1304                         return buf;
1305                         }
1306                 strcpy(p,c->name);
1307                 p+=n;
1308                 *(p++)=':';
1309                 len-=n+1;
1310                 }
1311         p[-1]='\0';
1312         return(buf);
1313         }
1314
1315 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1316                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1317         {
1318         int i,j=0;
1319         SSL_CIPHER *c;
1320         unsigned char *q;
1321 #ifndef OPENSSL_NO_KRB5
1322         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1323 #endif /* OPENSSL_NO_KRB5 */
1324
1325         if (sk == NULL) return(0);
1326         q=p;
1327
1328         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1329                 {
1330                 c=sk_SSL_CIPHER_value(sk,i);
1331 #ifndef OPENSSL_NO_KRB5
1332                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1333                     nokrb5)
1334                     continue;
1335 #endif /* OPENSSL_NO_KRB5 */
1336 #ifndef OPENSSL_NO_PSK
1337                 /* with PSK there must be client callback set */
1338                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1339                     s->psk_client_callback == NULL)
1340                         continue;
1341 #endif /* OPENSSL_NO_PSK */
1342                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1343                 p+=j;
1344                 }
1345         return(p-q);
1346         }
1347
1348 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1349                                                STACK_OF(SSL_CIPHER) **skp)
1350         {
1351         const SSL_CIPHER *c;
1352         STACK_OF(SSL_CIPHER) *sk;
1353         int i,n;
1354
1355         n=ssl_put_cipher_by_char(s,NULL,NULL);
1356         if ((num%n) != 0)
1357                 {
1358                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1359                 return(NULL);
1360                 }
1361         if ((skp == NULL) || (*skp == NULL))
1362                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1363         else
1364                 {
1365                 sk= *skp;
1366                 sk_SSL_CIPHER_zero(sk);
1367                 }
1368
1369         for (i=0; i<num; i+=n)
1370                 {
1371                 c=ssl_get_cipher_by_char(s,p);
1372                 p+=n;
1373                 if (c != NULL)
1374                         {
1375                         if (!sk_SSL_CIPHER_push(sk,c))
1376                                 {
1377                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1378                                 goto err;
1379                                 }
1380                         }
1381                 }
1382
1383         if (skp != NULL)
1384                 *skp=sk;
1385         return(sk);
1386 err:
1387         if ((skp == NULL) || (*skp == NULL))
1388                 sk_SSL_CIPHER_free(sk);
1389         return(NULL);
1390         }
1391
1392
1393 #ifndef OPENSSL_NO_TLSEXT
1394 /** return a servername extension value if provided in Client Hello, or NULL.
1395  * So far, only host_name types are defined (RFC 3546).
1396  */
1397
1398 const char *SSL_get_servername(const SSL *s, const int type)
1399         {
1400         if (type != TLSEXT_NAMETYPE_host_name)
1401                 return NULL;
1402
1403         return s->session && !s->tlsext_hostname ?
1404                 s->session->tlsext_hostname :
1405                 s->tlsext_hostname;
1406         }
1407
1408 int SSL_get_servername_type(const SSL *s)
1409         {
1410         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1411                 return TLSEXT_NAMETYPE_host_name;
1412         return -1;
1413         }
1414 #endif
1415
1416 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1417         {
1418         unsigned long l;
1419
1420         l=(unsigned long)
1421                 ((unsigned int) a->session_id[0]     )|
1422                 ((unsigned int) a->session_id[1]<< 8L)|
1423                 ((unsigned long)a->session_id[2]<<16L)|
1424                 ((unsigned long)a->session_id[3]<<24L);
1425         return(l);
1426         }
1427
1428 /* NB: If this function (or indeed the hash function which uses a sort of
1429  * coarser function than this one) is changed, ensure
1430  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1431  * able to construct an SSL_SESSION that will collide with any existing session
1432  * with a matching session ID. */
1433 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1434         {
1435         if (a->ssl_version != b->ssl_version)
1436                 return(1);
1437         if (a->session_id_length != b->session_id_length)
1438                 return(1);
1439         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1440         }
1441
1442 /* These wrapper functions should remain rather than redeclaring
1443  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1444  * variable. The reason is that the functions aren't static, they're exposed via
1445  * ssl.h. */
1446 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1447 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1448
1449 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1450         {
1451         SSL_CTX *ret=NULL;
1452
1453         if (meth == NULL)
1454                 {
1455                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1456                 return(NULL);
1457                 }
1458
1459         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1460                 {
1461                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1462                 goto err;
1463                 }
1464         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1465         if (ret == NULL)
1466                 goto err;
1467
1468         memset(ret,0,sizeof(SSL_CTX));
1469
1470         ret->method=meth;
1471
1472         ret->cert_store=NULL;
1473         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1474         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1475         ret->session_cache_head=NULL;
1476         ret->session_cache_tail=NULL;
1477
1478         /* We take the system default */
1479         ret->session_timeout=meth->get_timeout();
1480
1481         ret->new_session_cb=0;
1482         ret->remove_session_cb=0;
1483         ret->get_session_cb=0;
1484         ret->generate_session_id=0;
1485
1486         memset((char *)&ret->stats,0,sizeof(ret->stats));
1487
1488         ret->references=1;
1489         ret->quiet_shutdown=0;
1490
1491 /*      ret->cipher=NULL;*/
1492 /*      ret->s2->challenge=NULL;
1493         ret->master_key=NULL;
1494         ret->key_arg=NULL;
1495         ret->s2->conn_id=NULL; */
1496
1497         ret->info_callback=NULL;
1498
1499         ret->app_verify_callback=0;
1500         ret->app_verify_arg=NULL;
1501
1502         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1503         ret->read_ahead=0;
1504         ret->msg_callback=0;
1505         ret->msg_callback_arg=NULL;
1506         ret->verify_mode=SSL_VERIFY_NONE;
1507 #if 0
1508         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1509 #endif
1510         ret->sid_ctx_length=0;
1511         ret->default_verify_callback=NULL;
1512         if ((ret->cert=ssl_cert_new()) == NULL)
1513                 goto err;
1514
1515         ret->default_passwd_callback=0;
1516         ret->default_passwd_callback_userdata=NULL;
1517         ret->client_cert_cb=0;
1518         ret->app_gen_cookie_cb=0;
1519         ret->app_verify_cookie_cb=0;
1520
1521         ret->sessions=lh_SSL_SESSION_new();
1522         if (ret->sessions == NULL) goto err;
1523         ret->cert_store=X509_STORE_new();
1524         if (ret->cert_store == NULL) goto err;
1525
1526         ssl_create_cipher_list(ret->method,
1527                 &ret->cipher_list,&ret->cipher_list_by_id,
1528                 SSL_DEFAULT_CIPHER_LIST);
1529         if (ret->cipher_list == NULL
1530             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1531                 {
1532                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1533                 goto err2;
1534                 }
1535
1536         ret->param = X509_VERIFY_PARAM_new();
1537         if (!ret->param)
1538                 goto err;
1539
1540         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1541                 {
1542                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1543                 goto err2;
1544                 }
1545         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1546                 {
1547                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1548                 goto err2;
1549                 }
1550         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1551                 {
1552                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1553                 goto err2;
1554                 }
1555
1556         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1557                 goto err;
1558
1559         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1560
1561         ret->extra_certs=NULL;
1562         ret->comp_methods=SSL_COMP_get_compression_methods();
1563
1564         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1565
1566 #ifndef OPENSSL_NO_TLSEXT
1567         ret->tlsext_servername_callback = 0;
1568         ret->tlsext_servername_arg = NULL;
1569         /* Setup RFC4507 ticket keys */
1570         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1571                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1572                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1573                 ret->options |= SSL_OP_NO_TICKET;
1574
1575         ret->tlsext_status_cb = 0;
1576         ret->tlsext_status_arg = NULL;
1577
1578 #endif
1579 #ifndef OPENSSL_NO_PSK
1580         ret->psk_identity_hint=NULL;
1581         ret->psk_client_callback=NULL;
1582         ret->psk_server_callback=NULL;
1583 #endif
1584 #ifndef OPENSSL_NO_BUF_FREELISTS
1585         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1586         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1587         if (!ret->rbuf_freelist)
1588                 goto err;
1589         ret->rbuf_freelist->chunklen = 0;
1590         ret->rbuf_freelist->len = 0;
1591         ret->rbuf_freelist->head = NULL;
1592         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1593         if (!ret->wbuf_freelist)
1594                 {
1595                 OPENSSL_free(ret->rbuf_freelist);
1596                 goto err;
1597                 }
1598         ret->wbuf_freelist->chunklen = 0;
1599         ret->wbuf_freelist->len = 0;
1600         ret->wbuf_freelist->head = NULL;
1601 #endif
1602 #ifndef OPENSSL_NO_ENGINE
1603         ret->client_cert_engine = NULL;
1604 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1605 #define eng_strx(x)     #x
1606 #define eng_str(x)      eng_strx(x)
1607         /* Use specific client engine automatically... ignore errors */
1608         {
1609         ENGINE *eng;
1610         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1611         if (!eng)
1612                 {
1613                 ERR_clear_error();
1614                 ENGINE_load_builtin_engines();
1615                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1616                 }
1617         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1618                 ERR_clear_error();
1619         }
1620 #endif
1621 #endif
1622
1623         return(ret);
1624 err:
1625         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1626 err2:
1627         if (ret != NULL) SSL_CTX_free(ret);
1628         return(NULL);
1629         }
1630
1631 #if 0
1632 static void SSL_COMP_free(SSL_COMP *comp)
1633     { OPENSSL_free(comp); }
1634 #endif
1635
1636 #ifndef OPENSSL_NO_BUF_FREELISTS
1637 static void
1638 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1639         {
1640         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1641         for (ent = list->head; ent; ent = next)
1642                 {
1643                 next = ent->next;
1644                 OPENSSL_free(ent);
1645                 }
1646         OPENSSL_free(list);
1647         }
1648 #endif
1649
1650 void SSL_CTX_free(SSL_CTX *a)
1651         {
1652         int i;
1653
1654         if (a == NULL) return;
1655
1656         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1657 #ifdef REF_PRINT
1658         REF_PRINT("SSL_CTX",a);
1659 #endif
1660         if (i > 0) return;
1661 #ifdef REF_CHECK
1662         if (i < 0)
1663                 {
1664                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1665                 abort(); /* ok */
1666                 }
1667 #endif
1668
1669         if (a->param)
1670                 X509_VERIFY_PARAM_free(a->param);
1671
1672         /*
1673          * Free internal session cache. However: the remove_cb() may reference
1674          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1675          * after the sessions were flushed.
1676          * As the ex_data handling routines might also touch the session cache,
1677          * the most secure solution seems to be: empty (flush) the cache, then
1678          * free ex_data, then finally free the cache.
1679          * (See ticket [openssl.org #212].)
1680          */
1681         if (a->sessions != NULL)
1682                 SSL_CTX_flush_sessions(a,0);
1683
1684         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1685
1686         if (a->sessions != NULL)
1687                 lh_SSL_SESSION_free(a->sessions);
1688
1689         if (a->cert_store != NULL)
1690                 X509_STORE_free(a->cert_store);
1691         if (a->cipher_list != NULL)
1692                 sk_SSL_CIPHER_free(a->cipher_list);
1693         if (a->cipher_list_by_id != NULL)
1694                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1695         if (a->cert != NULL)
1696                 ssl_cert_free(a->cert);
1697         if (a->client_CA != NULL)
1698                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1699         if (a->extra_certs != NULL)
1700                 sk_X509_pop_free(a->extra_certs,X509_free);
1701 #if 0 /* This should never be done, since it removes a global database */
1702         if (a->comp_methods != NULL)
1703                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1704 #else
1705         a->comp_methods = NULL;
1706 #endif
1707
1708 #ifndef OPENSSL_NO_PSK
1709         if (a->psk_identity_hint)
1710                 OPENSSL_free(a->psk_identity_hint);
1711 #endif
1712 #ifndef OPENSSL_NO_ENGINE
1713         if (a->client_cert_engine)
1714                 ENGINE_finish(a->client_cert_engine);
1715 #endif
1716
1717 #ifndef OPENSSL_NO_BUF_FREELISTS
1718         if (a->wbuf_freelist)
1719                 ssl_buf_freelist_free(a->wbuf_freelist);
1720         if (a->rbuf_freelist)
1721                 ssl_buf_freelist_free(a->rbuf_freelist);
1722 #endif
1723
1724         OPENSSL_free(a);
1725         }
1726
1727 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1728         {
1729         ctx->default_passwd_callback=cb;
1730         }
1731
1732 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1733         {
1734         ctx->default_passwd_callback_userdata=u;
1735         }
1736
1737 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1738         {
1739         ctx->app_verify_callback=cb;
1740         ctx->app_verify_arg=arg;
1741         }
1742
1743 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1744         {
1745         ctx->verify_mode=mode;
1746         ctx->default_verify_callback=cb;
1747         }
1748
1749 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1750         {
1751         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1752         }
1753
1754 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1755         {
1756         CERT_PKEY *cpk;
1757         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1758         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1759         int rsa_tmp_export,dh_tmp_export,kl;
1760         unsigned long mask_k,mask_a,emask_k,emask_a;
1761         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1762 #ifndef OPENSSL_NO_ECDH
1763         int have_ecdh_tmp;
1764 #endif
1765         X509 *x = NULL;
1766         EVP_PKEY *ecc_pkey = NULL;
1767         int signature_nid = 0;
1768
1769         if (c == NULL) return;
1770
1771         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1772
1773 #ifndef OPENSSL_NO_RSA
1774         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1775         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1776                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1777 #else
1778         rsa_tmp=rsa_tmp_export=0;
1779 #endif
1780 #ifndef OPENSSL_NO_DH
1781         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1782         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1783                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1784 #else
1785         dh_tmp=dh_tmp_export=0;
1786 #endif
1787
1788 #ifndef OPENSSL_NO_ECDH
1789         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1790 #endif
1791         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1792         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1793         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1794         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1795         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1796         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1797         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1798         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1799         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1800         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1801         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1802 /* FIX THIS EAY EAY EAY */
1803         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1804         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1805         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1806         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1807         mask_k=0;
1808         mask_a=0;
1809         emask_k=0;
1810         emask_a=0;
1811
1812         
1813
1814 #ifdef CIPHER_DEBUG
1815         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1816                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1817                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1818 #endif
1819         
1820         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1821         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1822                 mask_k |= SSL_kGOST;
1823                 mask_a |= SSL_aGOST01;
1824         }
1825         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1826         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1827                 mask_k |= SSL_kGOST;
1828                 mask_a |= SSL_aGOST94;
1829         }
1830
1831         if (rsa_enc || (rsa_tmp && rsa_sign))
1832                 mask_k|=SSL_kRSA;
1833         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1834                 emask_k|=SSL_kRSA;
1835
1836 #if 0
1837         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1838         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1839                 (rsa_enc || rsa_sign || dsa_sign))
1840                 mask_k|=SSL_kEDH;
1841         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1842                 (rsa_enc || rsa_sign || dsa_sign))
1843                 emask_k|=SSL_kEDH;
1844 #endif
1845
1846         if (dh_tmp_export)
1847                 emask_k|=SSL_kEDH;
1848
1849         if (dh_tmp)
1850                 mask_k|=SSL_kEDH;
1851
1852         if (dh_rsa) mask_k|=SSL_kDHr;
1853         if (dh_rsa_export) emask_k|=SSL_kDHr;
1854
1855         if (dh_dsa) mask_k|=SSL_kDHd;
1856         if (dh_dsa_export) emask_k|=SSL_kDHd;
1857
1858         if (rsa_enc || rsa_sign)
1859                 {
1860                 mask_a|=SSL_aRSA;
1861                 emask_a|=SSL_aRSA;
1862                 }
1863
1864         if (dsa_sign)
1865                 {
1866                 mask_a|=SSL_aDSS;
1867                 emask_a|=SSL_aDSS;
1868                 }
1869
1870         mask_a|=SSL_aNULL;
1871         emask_a|=SSL_aNULL;
1872
1873 #ifndef OPENSSL_NO_KRB5
1874         mask_k|=SSL_kKRB5;
1875         mask_a|=SSL_aKRB5;
1876         emask_k|=SSL_kKRB5;
1877         emask_a|=SSL_aKRB5;
1878 #endif
1879
1880         /* An ECC certificate may be usable for ECDH and/or
1881          * ECDSA cipher suites depending on the key usage extension.
1882          */
1883         if (have_ecc_cert)
1884                 {
1885                 /* This call populates extension flags (ex_flags) */
1886                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1887                 X509_check_purpose(x, -1, 0);
1888                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1889                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1890                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1891                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1892                 ecc_pkey = X509_get_pubkey(x);
1893                 ecc_pkey_size = (ecc_pkey != NULL) ?
1894                     EVP_PKEY_bits(ecc_pkey) : 0;
1895                 EVP_PKEY_free(ecc_pkey);
1896                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1897                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1898 #ifndef OPENSSL_NO_ECDH
1899                 if (ecdh_ok)
1900                         {
1901                         const char *sig = OBJ_nid2ln(signature_nid);
1902                         if (sig == NULL)
1903                                 {
1904                                 ERR_clear_error();
1905                                 sig = "unknown";
1906                                 }
1907                                 
1908                         if (strstr(sig, "WithRSA"))
1909                                 {
1910                                 mask_k|=SSL_kECDHr;
1911                                 mask_a|=SSL_aECDH;
1912                                 if (ecc_pkey_size <= 163)
1913                                         {
1914                                         emask_k|=SSL_kECDHr;
1915                                         emask_a|=SSL_aECDH;
1916                                         }
1917                                 }
1918
1919                         if (signature_nid == NID_ecdsa_with_SHA1)
1920                                 {
1921                                 mask_k|=SSL_kECDHe;
1922                                 mask_a|=SSL_aECDH;
1923                                 if (ecc_pkey_size <= 163)
1924                                         {
1925                                         emask_k|=SSL_kECDHe;
1926                                         emask_a|=SSL_aECDH;
1927                                         }
1928                                 }
1929                         }
1930 #endif
1931 #ifndef OPENSSL_NO_ECDSA
1932                 if (ecdsa_ok)
1933                         {
1934                         mask_a|=SSL_aECDSA;
1935                         emask_a|=SSL_aECDSA;
1936                         }
1937 #endif
1938                 }
1939
1940 #ifndef OPENSSL_NO_ECDH
1941         if (have_ecdh_tmp)
1942                 {
1943                 mask_k|=SSL_kEECDH;
1944                 emask_k|=SSL_kEECDH;
1945                 }
1946 #endif
1947
1948 #ifndef OPENSSL_NO_PSK
1949         mask_k |= SSL_kPSK;
1950         mask_a |= SSL_aPSK;
1951         emask_k |= SSL_kPSK;
1952         emask_a |= SSL_aPSK;
1953 #endif
1954
1955         c->mask_k=mask_k;
1956         c->mask_a=mask_a;
1957         c->export_mask_k=emask_k;
1958         c->export_mask_a=emask_a;
1959         c->valid=1;
1960         }
1961
1962 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1963 #define ku_reject(x, usage) \
1964         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1965
1966 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
1967         {
1968         unsigned long alg_k, alg_a;
1969         EVP_PKEY *pkey = NULL;
1970         int keysize = 0;
1971         int signature_nid = 0;
1972
1973         alg_k = cs->algorithm_mkey;
1974         alg_a = cs->algorithm_auth;
1975
1976         if (SSL_C_IS_EXPORT(cs))
1977                 {
1978                 /* ECDH key length in export ciphers must be <= 163 bits */
1979                 pkey = X509_get_pubkey(x);
1980                 if (pkey == NULL) return 0;
1981                 keysize = EVP_PKEY_bits(pkey);
1982                 EVP_PKEY_free(pkey);
1983                 if (keysize > 163) return 0;
1984                 }
1985
1986         /* This call populates the ex_flags field correctly */
1987         X509_check_purpose(x, -1, 0);
1988         if ((x->sig_alg) && (x->sig_alg->algorithm))
1989                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1990         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1991                 {
1992                 /* key usage, if present, must allow key agreement */
1993                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1994                         {
1995                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
1996                         return 0;
1997                         }
1998                 if (alg_k & SSL_kECDHe)
1999                         {
2000                         /* signature alg must be ECDSA */
2001                         if (signature_nid != NID_ecdsa_with_SHA1)
2002                                 {
2003                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2004                                 return 0;
2005                                 }
2006                         }
2007                 if (alg_k & SSL_kECDHr)
2008                         {
2009                         /* signature alg must be RSA */
2010
2011                         const char *sig = OBJ_nid2ln(signature_nid);
2012                         if (sig == NULL)
2013                                 {
2014                                 ERR_clear_error();
2015                                 sig = "unknown";
2016                                 }
2017                         if (strstr(sig, "WithRSA") == NULL)
2018                                 {
2019                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2020                                 return 0;
2021                                 }
2022                         }
2023                 }
2024         if (alg_a & SSL_aECDSA)
2025                 {
2026                 /* key usage, if present, must allow signing */
2027                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2028                         {
2029                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2030                         return 0;
2031                         }
2032                 }
2033
2034         return 1;  /* all checks are ok */
2035         }
2036
2037 /* THIS NEEDS CLEANING UP */
2038 X509 *ssl_get_server_send_cert(SSL *s)
2039         {
2040         unsigned long alg_k,alg_a,mask_k,mask_a;
2041         CERT *c;
2042         int i,is_export;
2043
2044         c=s->cert;
2045         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2046         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2047         if (is_export)
2048                 {
2049                 mask_k = c->export_mask_k;
2050                 mask_a = c->export_mask_a;
2051                 }
2052         else
2053                 {
2054                 mask_k = c->mask_k;
2055                 mask_a = c->mask_a;
2056                 }
2057         
2058         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2059         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2060
2061         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2062                 {
2063                 /* we don't need to look at SSL_kEECDH
2064                  * since no certificate is needed for
2065                  * anon ECDH and for authenticated
2066                  * EECDH, the check for the auth
2067                  * algorithm will set i correctly
2068                  * NOTE: For ECDH-RSA, we need an ECC
2069                  * not an RSA cert but for EECDH-RSA
2070                  * we need an RSA cert. Placing the
2071                  * checks for SSL_kECDH before RSA
2072                  * checks ensures the correct cert is chosen.
2073                  */
2074                 i=SSL_PKEY_ECC;
2075                 }
2076         else if (alg_a & SSL_aECDSA)
2077                 {
2078                 i=SSL_PKEY_ECC;
2079                 }
2080         else if (alg_k & SSL_kDHr)
2081                 i=SSL_PKEY_DH_RSA;
2082         else if (alg_k & SSL_kDHd)
2083                 i=SSL_PKEY_DH_DSA;
2084         else if (alg_a & SSL_aDSS)
2085                 i=SSL_PKEY_DSA_SIGN;
2086         else if (alg_a & SSL_aRSA)
2087                 {
2088                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2089                         i=SSL_PKEY_RSA_SIGN;
2090                 else
2091                         i=SSL_PKEY_RSA_ENC;
2092                 }
2093         else if (alg_a & SSL_aKRB5)
2094                 {
2095                 /* VRS something else here? */
2096                 return(NULL);
2097                 }
2098         else if (alg_a & SSL_aGOST94) 
2099                 i=SSL_PKEY_GOST94;
2100         else if (alg_a & SSL_aGOST01)
2101                 i=SSL_PKEY_GOST01;
2102         else /* if (alg_a & SSL_aNULL) */
2103                 {
2104                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2105                 return(NULL);
2106                 }
2107         if (c->pkeys[i].x509 == NULL) return(NULL);
2108
2109         return(c->pkeys[i].x509);
2110         }
2111
2112 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2113         {
2114         unsigned long alg_a;
2115         CERT *c;
2116
2117         alg_a = cipher->algorithm_auth;
2118         c=s->cert;
2119
2120         if ((alg_a & SSL_aDSS) &&
2121                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2122                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2123         else if (alg_a & SSL_aRSA)
2124                 {
2125                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2126                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2127                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2128                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2129                 else
2130                         return(NULL);
2131                 }
2132         else if ((alg_a & SSL_aECDSA) &&
2133                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2134                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2135         else /* if (alg_a & SSL_aNULL) */
2136                 {
2137                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2138                 return(NULL);
2139                 }
2140         }
2141
2142 void ssl_update_cache(SSL *s,int mode)
2143         {
2144         int i;
2145
2146         /* If the session_id_length is 0, we are not supposed to cache it,
2147          * and it would be rather hard to do anyway :-) */
2148         if (s->session->session_id_length == 0) return;
2149
2150         i=s->session_ctx->session_cache_mode;
2151         if ((i & mode) && (!s->hit)
2152                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2153                     || SSL_CTX_add_session(s->session_ctx,s->session))
2154                 && (s->session_ctx->new_session_cb != NULL))
2155                 {
2156                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2157                 if (!s->session_ctx->new_session_cb(s,s->session))
2158                         SSL_SESSION_free(s->session);
2159                 }
2160
2161         /* auto flush every 255 connections */
2162         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2163                 ((i & mode) == mode))
2164                 {
2165                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2166                         ?s->session_ctx->stats.sess_connect_good
2167                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2168                         {
2169                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2170                         }
2171                 }
2172         }
2173
2174 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2175         {
2176         return(s->method);
2177         }
2178
2179 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2180         {
2181         int conn= -1;
2182         int ret=1;
2183
2184         if (s->method != meth)
2185                 {
2186                 if (s->handshake_func != NULL)
2187                         conn=(s->handshake_func == s->method->ssl_connect);
2188
2189                 if (s->method->version == meth->version)
2190                         s->method=meth;
2191                 else
2192                         {
2193                         s->method->ssl_free(s);
2194                         s->method=meth;
2195                         ret=s->method->ssl_new(s);
2196                         }
2197
2198                 if (conn == 1)
2199                         s->handshake_func=meth->ssl_connect;
2200                 else if (conn == 0)
2201                         s->handshake_func=meth->ssl_accept;
2202                 }
2203         return(ret);
2204         }
2205
2206 int SSL_get_error(const SSL *s,int i)
2207         {
2208         int reason;
2209         unsigned long l;
2210         BIO *bio;
2211
2212         if (i > 0) return(SSL_ERROR_NONE);
2213
2214         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2215          * etc, where we do encode the error */
2216         if ((l=ERR_peek_error()) != 0)
2217                 {
2218                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2219                         return(SSL_ERROR_SYSCALL);
2220                 else
2221                         return(SSL_ERROR_SSL);
2222                 }
2223
2224         if ((i < 0) && SSL_want_read(s))
2225                 {
2226                 bio=SSL_get_rbio(s);
2227                 if (BIO_should_read(bio))
2228                         return(SSL_ERROR_WANT_READ);
2229                 else if (BIO_should_write(bio))
2230                         /* This one doesn't make too much sense ... We never try
2231                          * to write to the rbio, and an application program where
2232                          * rbio and wbio are separate couldn't even know what it
2233                          * should wait for.
2234                          * However if we ever set s->rwstate incorrectly
2235                          * (so that we have SSL_want_read(s) instead of
2236                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2237                          * this test works around that bug; so it might be safer
2238                          * to keep it. */
2239                         return(SSL_ERROR_WANT_WRITE);
2240                 else if (BIO_should_io_special(bio))
2241                         {
2242                         reason=BIO_get_retry_reason(bio);
2243                         if (reason == BIO_RR_CONNECT)
2244                                 return(SSL_ERROR_WANT_CONNECT);
2245                         else if (reason == BIO_RR_ACCEPT)
2246                                 return(SSL_ERROR_WANT_ACCEPT);
2247                         else
2248                                 return(SSL_ERROR_SYSCALL); /* unknown */
2249                         }
2250                 }
2251
2252         if ((i < 0) && SSL_want_write(s))
2253                 {
2254                 bio=SSL_get_wbio(s);
2255                 if (BIO_should_write(bio))
2256                         return(SSL_ERROR_WANT_WRITE);
2257                 else if (BIO_should_read(bio))
2258                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2259                         return(SSL_ERROR_WANT_READ);
2260                 else if (BIO_should_io_special(bio))
2261                         {
2262                         reason=BIO_get_retry_reason(bio);
2263                         if (reason == BIO_RR_CONNECT)
2264                                 return(SSL_ERROR_WANT_CONNECT);
2265                         else if (reason == BIO_RR_ACCEPT)
2266                                 return(SSL_ERROR_WANT_ACCEPT);
2267                         else
2268                                 return(SSL_ERROR_SYSCALL);
2269                         }
2270                 }
2271         if ((i < 0) && SSL_want_x509_lookup(s))
2272                 {
2273                 return(SSL_ERROR_WANT_X509_LOOKUP);
2274                 }
2275
2276         if (i == 0)
2277                 {
2278                 if (s->version == SSL2_VERSION)
2279                         {
2280                         /* assume it is the socket being closed */
2281                         return(SSL_ERROR_ZERO_RETURN);
2282                         }
2283                 else
2284                         {
2285                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2286                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2287                                 return(SSL_ERROR_ZERO_RETURN);
2288                         }
2289                 }
2290         return(SSL_ERROR_SYSCALL);
2291         }
2292
2293 int SSL_do_handshake(SSL *s)
2294         {
2295         int ret=1;
2296
2297         if (s->handshake_func == NULL)
2298                 {
2299                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2300                 return(-1);
2301                 }
2302
2303         s->method->ssl_renegotiate_check(s);
2304
2305         if (SSL_in_init(s) || SSL_in_before(s))
2306                 {
2307                 ret=s->handshake_func(s);
2308                 }
2309         return(ret);
2310         }
2311
2312 /* For the next 2 functions, SSL_clear() sets shutdown and so
2313  * one of these calls will reset it */
2314 void SSL_set_accept_state(SSL *s)
2315         {
2316         s->server=1;
2317         s->shutdown=0;
2318         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2319         s->handshake_func=s->method->ssl_accept;
2320         /* clear the current cipher */
2321         ssl_clear_cipher_ctx(s);
2322         ssl_clear_hash_ctx(&s->read_hash);
2323         ssl_clear_hash_ctx(&s->write_hash);
2324         }
2325
2326 void SSL_set_connect_state(SSL *s)
2327         {
2328         s->server=0;
2329         s->shutdown=0;
2330         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2331         s->handshake_func=s->method->ssl_connect;
2332         /* clear the current cipher */
2333         ssl_clear_cipher_ctx(s);
2334         ssl_clear_hash_ctx(&s->read_hash);
2335         ssl_clear_hash_ctx(&s->write_hash);
2336         }
2337
2338 int ssl_undefined_function(SSL *s)
2339         {
2340         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2341         return(0);
2342         }
2343
2344 int ssl_undefined_void_function(void)
2345         {
2346         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2347         return(0);
2348         }
2349
2350 int ssl_undefined_const_function(const SSL *s)
2351         {
2352         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2353         return(0);
2354         }
2355
2356 SSL_METHOD *ssl_bad_method(int ver)
2357         {
2358         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2359         return(NULL);
2360         }
2361
2362 const char *SSL_get_version(const SSL *s)
2363         {
2364         if (s->version == TLS1_VERSION)
2365                 return("TLSv1");
2366         else if (s->version == SSL3_VERSION)
2367                 return("SSLv3");
2368         else if (s->version == SSL2_VERSION)
2369                 return("SSLv2");
2370         else
2371                 return("unknown");
2372         }
2373
2374 SSL *SSL_dup(SSL *s)
2375         {
2376         STACK_OF(X509_NAME) *sk;
2377         X509_NAME *xn;
2378         SSL *ret;
2379         int i;
2380         
2381         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2382             return(NULL);
2383
2384         ret->version = s->version;
2385         ret->type = s->type;
2386         ret->method = s->method;
2387
2388         if (s->session != NULL)
2389                 {
2390                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2391                 SSL_copy_session_id(ret,s);
2392                 }
2393         else
2394                 {
2395                 /* No session has been established yet, so we have to expect
2396                  * that s->cert or ret->cert will be changed later --
2397                  * they should not both point to the same object,
2398                  * and thus we can't use SSL_copy_session_id. */
2399
2400                 ret->method->ssl_free(ret);
2401                 ret->method = s->method;
2402                 ret->method->ssl_new(ret);
2403
2404                 if (s->cert != NULL)
2405                         {
2406                         if (ret->cert != NULL)
2407                                 {
2408                                 ssl_cert_free(ret->cert);
2409                                 }
2410                         ret->cert = ssl_cert_dup(s->cert);
2411                         if (ret->cert == NULL)
2412                                 goto err;
2413                         }
2414                                 
2415                 SSL_set_session_id_context(ret,
2416                         s->sid_ctx, s->sid_ctx_length);
2417                 }
2418
2419         ret->options=s->options;
2420         ret->mode=s->mode;
2421         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2422         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2423         ret->msg_callback = s->msg_callback;
2424         ret->msg_callback_arg = s->msg_callback_arg;
2425         SSL_set_verify(ret,SSL_get_verify_mode(s),
2426                 SSL_get_verify_callback(s));
2427         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2428         ret->generate_session_id = s->generate_session_id;
2429
2430         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2431         
2432         ret->debug=s->debug;
2433
2434         /* copy app data, a little dangerous perhaps */
2435         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2436                 goto err;
2437
2438         /* setup rbio, and wbio */
2439         if (s->rbio != NULL)
2440                 {
2441                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2442                         goto err;
2443                 }
2444         if (s->wbio != NULL)
2445                 {
2446                 if (s->wbio != s->rbio)
2447                         {
2448                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2449                                 goto err;
2450                         }
2451                 else
2452                         ret->wbio=ret->rbio;
2453                 }
2454         ret->rwstate = s->rwstate;
2455         ret->in_handshake = s->in_handshake;
2456         ret->handshake_func = s->handshake_func;
2457         ret->server = s->server;
2458         ret->new_session = s->new_session;
2459         ret->quiet_shutdown = s->quiet_shutdown;
2460         ret->shutdown=s->shutdown;
2461         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2462         ret->rstate=s->rstate;
2463         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2464         ret->hit=s->hit;
2465
2466         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2467
2468         /* dup the cipher_list and cipher_list_by_id stacks */
2469         if (s->cipher_list != NULL)
2470                 {
2471                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2472                         goto err;
2473                 }
2474         if (s->cipher_list_by_id != NULL)
2475                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2476                         == NULL)
2477                         goto err;
2478
2479         /* Dup the client_CA list */
2480         if (s->client_CA != NULL)
2481                 {
2482                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2483                 ret->client_CA=sk;
2484                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2485                         {
2486                         xn=sk_X509_NAME_value(sk,i);
2487                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2488                                 {
2489                                 X509_NAME_free(xn);
2490                                 goto err;
2491                                 }
2492                         }
2493                 }
2494
2495         if (0)
2496                 {
2497 err:
2498                 if (ret != NULL) SSL_free(ret);
2499                 ret=NULL;
2500                 }
2501         return(ret);
2502         }
2503
2504 void ssl_clear_cipher_ctx(SSL *s)
2505         {
2506         if (s->enc_read_ctx != NULL)
2507                 {
2508                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2509                 OPENSSL_free(s->enc_read_ctx);
2510                 s->enc_read_ctx=NULL;
2511                 }
2512         if (s->enc_write_ctx != NULL)
2513                 {
2514                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2515                 OPENSSL_free(s->enc_write_ctx);
2516                 s->enc_write_ctx=NULL;
2517                 }
2518 #ifndef OPENSSL_NO_COMP
2519         if (s->expand != NULL)
2520                 {
2521                 COMP_CTX_free(s->expand);
2522                 s->expand=NULL;
2523                 }
2524         if (s->compress != NULL)
2525                 {
2526                 COMP_CTX_free(s->compress);
2527                 s->compress=NULL;
2528                 }
2529 #endif
2530         }
2531
2532 /* Fix this function so that it takes an optional type parameter */
2533 X509 *SSL_get_certificate(const SSL *s)
2534         {
2535         if (s->cert != NULL)
2536                 return(s->cert->key->x509);
2537         else
2538                 return(NULL);
2539         }
2540
2541 /* Fix this function so that it takes an optional type parameter */
2542 EVP_PKEY *SSL_get_privatekey(SSL *s)
2543         {
2544         if (s->cert != NULL)
2545                 return(s->cert->key->privatekey);
2546         else
2547                 return(NULL);
2548         }
2549
2550 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2551         {
2552         if ((s->session != NULL) && (s->session->cipher != NULL))
2553                 return(s->session->cipher);
2554         return(NULL);
2555         }
2556 #ifdef OPENSSL_NO_COMP
2557 const void *SSL_get_current_compression(SSL *s)
2558         {
2559         return NULL;
2560         }
2561 const void *SSL_get_current_expansion(SSL *s)
2562         {
2563         return NULL;
2564         }
2565 #else
2566
2567 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2568         {
2569         if (s->compress != NULL)
2570                 return(s->compress->meth);
2571         return(NULL);
2572         }
2573
2574 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2575         {
2576         if (s->expand != NULL)
2577                 return(s->expand->meth);
2578         return(NULL);
2579         }
2580 #endif
2581
2582 int ssl_init_wbio_buffer(SSL *s,int push)
2583         {
2584         BIO *bbio;
2585
2586         if (s->bbio == NULL)
2587                 {
2588                 bbio=BIO_new(BIO_f_buffer());
2589                 if (bbio == NULL) return(0);
2590                 s->bbio=bbio;
2591                 }
2592         else
2593                 {
2594                 bbio=s->bbio;
2595                 if (s->bbio == s->wbio)
2596                         s->wbio=BIO_pop(s->wbio);
2597                 }
2598         (void)BIO_reset(bbio);
2599 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2600         if (!BIO_set_read_buffer_size(bbio,1))
2601                 {
2602                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2603                 return(0);
2604                 }
2605         if (push)
2606                 {
2607                 if (s->wbio != bbio)
2608                         s->wbio=BIO_push(bbio,s->wbio);
2609                 }
2610         else
2611                 {
2612                 if (s->wbio == bbio)
2613                         s->wbio=BIO_pop(bbio);
2614                 }
2615         return(1);
2616         }
2617
2618 void ssl_free_wbio_buffer(SSL *s)
2619         {
2620         if (s->bbio == NULL) return;
2621
2622         if (s->bbio == s->wbio)
2623                 {
2624                 /* remove buffering */
2625                 s->wbio=BIO_pop(s->wbio);
2626 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2627                 assert(s->wbio != NULL);
2628 #endif
2629         }
2630         BIO_free(s->bbio);
2631         s->bbio=NULL;
2632         }
2633         
2634 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2635         {
2636         ctx->quiet_shutdown=mode;
2637         }
2638
2639 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2640         {
2641         return(ctx->quiet_shutdown);
2642         }
2643
2644 void SSL_set_quiet_shutdown(SSL *s,int mode)
2645         {
2646         s->quiet_shutdown=mode;
2647         }
2648
2649 int SSL_get_quiet_shutdown(const SSL *s)
2650         {
2651         return(s->quiet_shutdown);
2652         }
2653
2654 void SSL_set_shutdown(SSL *s,int mode)
2655         {
2656         s->shutdown=mode;
2657         }
2658
2659 int SSL_get_shutdown(const SSL *s)
2660         {
2661         return(s->shutdown);
2662         }
2663
2664 int SSL_version(const SSL *s)
2665         {
2666         return(s->version);
2667         }
2668
2669 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2670         {
2671         return(ssl->ctx);
2672         }
2673
2674 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2675         {
2676         if (ssl->ctx == ctx)
2677                 return ssl->ctx;
2678 #ifndef OPENSSL_NO_TLSEXT
2679         if (ctx == NULL)
2680                 ctx = ssl->initial_ctx;
2681 #endif
2682         if (ssl->cert != NULL)
2683                 ssl_cert_free(ssl->cert);
2684         ssl->cert = ssl_cert_dup(ctx->cert);
2685         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2686         if (ssl->ctx != NULL)
2687                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2688         ssl->ctx = ctx;
2689         return(ssl->ctx);
2690         }
2691
2692 #ifndef OPENSSL_NO_STDIO
2693 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2694         {
2695         return(X509_STORE_set_default_paths(ctx->cert_store));
2696         }
2697
2698 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2699                 const char *CApath)
2700         {
2701         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2702         }
2703 #endif
2704
2705 void SSL_set_info_callback(SSL *ssl,
2706         void (*cb)(const SSL *ssl,int type,int val))
2707         {
2708         ssl->info_callback=cb;
2709         }
2710
2711 /* One compiler (Diab DCC) doesn't like argument names in returned
2712    function pointer.  */
2713 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2714         {
2715         return ssl->info_callback;
2716         }
2717
2718 int SSL_state(const SSL *ssl)
2719         {
2720         return(ssl->state);
2721         }
2722
2723 void SSL_set_verify_result(SSL *ssl,long arg)
2724         {
2725         ssl->verify_result=arg;
2726         }
2727
2728 long SSL_get_verify_result(const SSL *ssl)
2729         {
2730         return(ssl->verify_result);
2731         }
2732
2733 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2734                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2735         {
2736         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2737                                 new_func, dup_func, free_func);
2738         }
2739
2740 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2741         {
2742         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2743         }
2744
2745 void *SSL_get_ex_data(const SSL *s,int idx)
2746         {
2747         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2748         }
2749
2750 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2751                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2752         {
2753         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2754                                 new_func, dup_func, free_func);
2755         }
2756
2757 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2758         {
2759         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2760         }
2761
2762 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2763         {
2764         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2765         }
2766
2767 int ssl_ok(SSL *s)
2768         {
2769         return(1);
2770         }
2771
2772 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2773         {
2774         return(ctx->cert_store);
2775         }
2776
2777 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2778         {
2779         if (ctx->cert_store != NULL)
2780                 X509_STORE_free(ctx->cert_store);
2781         ctx->cert_store=store;
2782         }
2783
2784 int SSL_want(const SSL *s)
2785         {
2786         return(s->rwstate);
2787         }
2788
2789 /*!
2790  * \brief Set the callback for generating temporary RSA keys.
2791  * \param ctx the SSL context.
2792  * \param cb the callback
2793  */
2794
2795 #ifndef OPENSSL_NO_RSA
2796 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2797                                                           int is_export,
2798                                                           int keylength))
2799     {
2800     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2801     }
2802
2803 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2804                                                   int is_export,
2805                                                   int keylength))
2806     {
2807     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2808     }
2809 #endif
2810
2811 #ifdef DOXYGEN
2812 /*!
2813  * \brief The RSA temporary key callback function.
2814  * \param ssl the SSL session.
2815  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2816  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2817  * of the required key in bits.
2818  * \return the temporary RSA key.
2819  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2820  */
2821
2822 RSA *cb(SSL *ssl,int is_export,int keylength)
2823     {}
2824 #endif
2825
2826 /*!
2827  * \brief Set the callback for generating temporary DH keys.
2828  * \param ctx the SSL context.
2829  * \param dh the callback
2830  */
2831
2832 #ifndef OPENSSL_NO_DH
2833 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2834                                                         int keylength))
2835         {
2836         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2837         }
2838
2839 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2840                                                 int keylength))
2841         {
2842         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2843         }
2844 #endif
2845
2846 #ifndef OPENSSL_NO_ECDH
2847 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2848                                                                 int keylength))
2849         {
2850         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2851         }
2852
2853 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2854                                                         int keylength))
2855         {
2856         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2857         }
2858 #endif
2859
2860 #ifndef OPENSSL_NO_PSK
2861 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2862         {
2863         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2864                 {
2865                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2866                 return 0;
2867                 }
2868         if (ctx->psk_identity_hint != NULL)
2869                 OPENSSL_free(ctx->psk_identity_hint);
2870         if (identity_hint != NULL)
2871                 {
2872                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2873                 if (ctx->psk_identity_hint == NULL)
2874                         return 0;
2875                 }
2876         else
2877                 ctx->psk_identity_hint = NULL;
2878         return 1;
2879         }
2880
2881 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2882         {
2883         if (s == NULL)
2884                 return 0;
2885
2886         if (s->session == NULL)
2887                 return 1; /* session not created yet, ignored */
2888
2889         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2890                 {
2891                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2892                 return 0;
2893                 }
2894         if (s->session->psk_identity_hint != NULL)
2895                 OPENSSL_free(s->session->psk_identity_hint);
2896         if (identity_hint != NULL)
2897                 {
2898                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2899                 if (s->session->psk_identity_hint == NULL)
2900                         return 0;
2901                 }
2902         else
2903                 s->session->psk_identity_hint = NULL;
2904         return 1;
2905         }
2906
2907 const char *SSL_get_psk_identity_hint(const SSL *s)
2908         {
2909         if (s == NULL || s->session == NULL)
2910                 return NULL;
2911         return(s->session->psk_identity_hint);
2912         }
2913
2914 const char *SSL_get_psk_identity(const SSL *s)
2915         {
2916         if (s == NULL || s->session == NULL)
2917                 return NULL;
2918         return(s->session->psk_identity);
2919         }
2920
2921 void SSL_set_psk_client_callback(SSL *s,
2922     unsigned int (*cb)(SSL *ssl, const char *hint,
2923                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2924                        unsigned int max_psk_len))
2925         {
2926         s->psk_client_callback = cb;
2927         }
2928
2929 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2930     unsigned int (*cb)(SSL *ssl, const char *hint,
2931                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2932                        unsigned int max_psk_len))
2933         {
2934         ctx->psk_client_callback = cb;
2935         }
2936
2937 void SSL_set_psk_server_callback(SSL *s,
2938     unsigned int (*cb)(SSL *ssl, const char *identity,
2939                        unsigned char *psk, unsigned int max_psk_len))
2940         {
2941         s->psk_server_callback = cb;
2942         }
2943
2944 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2945     unsigned int (*cb)(SSL *ssl, const char *identity,
2946                        unsigned char *psk, unsigned int max_psk_len))
2947         {
2948         ctx->psk_server_callback = cb;
2949         }
2950 #endif
2951
2952 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2953         {
2954         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2955         }
2956 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
2957         {
2958         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2959         }
2960
2961 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2962  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2963  * any. If EVP_MD pointer is passed, initializes ctx with this md
2964  * Returns newly allocated ctx;
2965  */
2966
2967 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
2968 {
2969         ssl_clear_hash_ctx(hash);
2970         *hash = EVP_MD_CTX_create();
2971         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2972         return *hash;
2973 }
2974 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
2975 {
2976
2977         if (*hash) EVP_MD_CTX_destroy(*hash);
2978         *hash=NULL;
2979 }
2980
2981 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2982 #include "../crypto/bio/bss_file.c"
2983 #endif
2984
2985 IMPLEMENT_STACK_OF(SSL_CIPHER)
2986 IMPLEMENT_STACK_OF(SSL_COMP)