7b911ae1eac610d591688c174f45e14651dc3c92
[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),
263                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
264         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
265                 {
266                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
267                 return(0);
268                 }
269         return(1);
270         }
271
272 SSL *SSL_new(SSL_CTX *ctx)
273         {
274         SSL *s;
275
276         if (ctx == NULL)
277                 {
278                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
279                 return(NULL);
280                 }
281         if (ctx->method == NULL)
282                 {
283                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
284                 return(NULL);
285                 }
286
287         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
288         if (s == NULL) goto err;
289         memset(s,0,sizeof(SSL));
290
291 #ifndef OPENSSL_NO_KRB5
292         s->kssl_ctx = kssl_ctx_new();
293 #endif  /* OPENSSL_NO_KRB5 */
294
295         s->options=ctx->options;
296         s->mode=ctx->mode;
297         s->max_cert_list=ctx->max_cert_list;
298
299         if (ctx->cert != NULL)
300                 {
301                 /* Earlier library versions used to copy the pointer to
302                  * the CERT, not its contents; only when setting new
303                  * parameters for the per-SSL copy, ssl_cert_new would be
304                  * called (and the direct reference to the per-SSL_CTX
305                  * settings would be lost, but those still were indirectly
306                  * accessed for various purposes, and for that reason they
307                  * used to be known as s->ctx->default_cert).
308                  * Now we don't look at the SSL_CTX's CERT after having
309                  * duplicated it once. */
310
311                 s->cert = ssl_cert_dup(ctx->cert);
312                 if (s->cert == NULL)
313                         goto err;
314                 }
315         else
316                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
317
318         s->read_ahead=ctx->read_ahead;
319         s->msg_callback=ctx->msg_callback;
320         s->msg_callback_arg=ctx->msg_callback_arg;
321         s->verify_mode=ctx->verify_mode;
322 #if 0
323         s->verify_depth=ctx->verify_depth;
324 #endif
325         s->sid_ctx_length=ctx->sid_ctx_length;
326         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
327         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
328         s->verify_callback=ctx->default_verify_callback;
329         s->generate_session_id=ctx->generate_session_id;
330
331         s->param = X509_VERIFY_PARAM_new();
332         if (!s->param)
333                 goto err;
334         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
335 #if 0
336         s->purpose = ctx->purpose;
337         s->trust = ctx->trust;
338 #endif
339         s->quiet_shutdown=ctx->quiet_shutdown;
340         s->max_send_fragment = ctx->max_send_fragment;
341
342         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
343         s->ctx=ctx;
344 #ifndef OPENSSL_NO_TLSEXT
345         s->tlsext_debug_cb = 0;
346         s->tlsext_debug_arg = NULL;
347         s->tlsext_ticket_expected = 0;
348         s->tlsext_status_type = -1;
349         s->tlsext_status_expected = 0;
350         s->tlsext_ocsp_ids = NULL;
351         s->tlsext_ocsp_exts = NULL;
352         s->tlsext_ocsp_resp = NULL;
353         s->tlsext_ocsp_resplen = -1;
354         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
355         s->initial_ctx=ctx;
356 #endif
357
358         s->verify_result=X509_V_OK;
359
360         s->method=ctx->method;
361
362         if (!s->method->ssl_new(s))
363                 goto err;
364
365         s->references=1;
366         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
367
368         SSL_clear(s);
369
370         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
371
372 #ifndef OPENSSL_NO_PSK
373         s->psk_client_callback=ctx->psk_client_callback;
374         s->psk_server_callback=ctx->psk_server_callback;
375 #endif
376
377         return(s);
378 err:
379         if (s != NULL)
380                 {
381                 if (s->cert != NULL)
382                         ssl_cert_free(s->cert);
383                 if (s->ctx != NULL)
384                         SSL_CTX_free(s->ctx); /* decrement reference count */
385                 OPENSSL_free(s);
386                 }
387         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
388         return(NULL);
389         }
390
391 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
392                                    unsigned int sid_ctx_len)
393     {
394     if(sid_ctx_len > sizeof ctx->sid_ctx)
395         {
396         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
397         return 0;
398         }
399     ctx->sid_ctx_length=sid_ctx_len;
400     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
401
402     return 1;
403     }
404
405 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
406                                unsigned int sid_ctx_len)
407     {
408     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
409         {
410         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
411         return 0;
412         }
413     ssl->sid_ctx_length=sid_ctx_len;
414     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
415
416     return 1;
417     }
418
419 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
420         {
421         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
422         ctx->generate_session_id = cb;
423         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
424         return 1;
425         }
426
427 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
428         {
429         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
430         ssl->generate_session_id = cb;
431         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
432         return 1;
433         }
434
435 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
436                                 unsigned int id_len)
437         {
438         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
439          * we can "construct" a session to give us the desired check - ie. to
440          * find if there's a session in the hash table that would conflict with
441          * any new session built out of this id/id_len and the ssl_version in
442          * use by this SSL. */
443         SSL_SESSION r, *p;
444
445         if(id_len > sizeof r.session_id)
446                 return 0;
447
448         r.ssl_version = ssl->version;
449         r.session_id_length = id_len;
450         memcpy(r.session_id, id, id_len);
451         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
452          * callback is calling us to check the uniqueness of a shorter ID, it
453          * must be compared as a padded-out ID because that is what it will be
454          * converted to when the callback has finished choosing it. */
455         if((r.ssl_version == SSL2_VERSION) &&
456                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
457                 {
458                 memset(r.session_id + id_len, 0,
459                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
460                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
461                 }
462
463         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
464         p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
465         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
466         return (p != NULL);
467         }
468
469 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
470         {
471         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
472         }
473
474 int SSL_set_purpose(SSL *s, int purpose)
475         {
476         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
477         }
478
479 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
480         {
481         return X509_VERIFY_PARAM_set_trust(s->param, trust);
482         }
483
484 int SSL_set_trust(SSL *s, int trust)
485         {
486         return X509_VERIFY_PARAM_set_trust(s->param, trust);
487         }
488
489 void SSL_free(SSL *s)
490         {
491         int i;
492
493         if(s == NULL)
494             return;
495
496         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
497 #ifdef REF_PRINT
498         REF_PRINT("SSL",s);
499 #endif
500         if (i > 0) return;
501 #ifdef REF_CHECK
502         if (i < 0)
503                 {
504                 fprintf(stderr,"SSL_free, bad reference count\n");
505                 abort(); /* ok */
506                 }
507 #endif
508
509         if (s->param)
510                 X509_VERIFY_PARAM_free(s->param);
511
512         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
513
514         if (s->bbio != NULL)
515                 {
516                 /* If the buffering BIO is in place, pop it off */
517                 if (s->bbio == s->wbio)
518                         {
519                         s->wbio=BIO_pop(s->wbio);
520                         }
521                 BIO_free(s->bbio);
522                 s->bbio=NULL;
523                 }
524         if (s->rbio != NULL)
525                 BIO_free_all(s->rbio);
526         if ((s->wbio != NULL) && (s->wbio != s->rbio))
527                 BIO_free_all(s->wbio);
528
529         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
530
531         /* add extra stuff */
532         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
533         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
534
535         /* Make the next call work :-) */
536         if (s->session != NULL)
537                 {
538                 ssl_clear_bad_session(s);
539                 SSL_SESSION_free(s->session);
540                 }
541
542         ssl_clear_cipher_ctx(s);
543         ssl_clear_hash_ctx(&s->read_hash);
544         ssl_clear_hash_ctx(&s->write_hash);
545
546         if (s->cert != NULL) ssl_cert_free(s->cert);
547         /* Free up if allocated */
548
549         if (s->ctx) SSL_CTX_free(s->ctx);
550 #ifndef OPENSSL_NO_TLSEXT
551         if (s->tlsext_hostname)
552                 OPENSSL_free(s->tlsext_hostname);
553         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
554 #ifndef OPENSSL_NO_EC
555         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
556         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
557 #endif /* OPENSSL_NO_EC */
558         if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
559         if (s->tlsext_ocsp_exts)
560                 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
561                                                 X509_EXTENSION_free);
562         if (s->tlsext_ocsp_ids)
563                 sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
564         if (s->tlsext_ocsp_resp)
565                 OPENSSL_free(s->tlsext_ocsp_resp);
566 #endif
567
568         if (s->client_CA != NULL)
569                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
570
571         if (s->method != NULL) s->method->ssl_free(s);
572
573 #ifndef OPENSSL_NO_KRB5
574         if (s->kssl_ctx != NULL)
575                 kssl_ctx_free(s->kssl_ctx);
576 #endif  /* OPENSSL_NO_KRB5 */
577
578         OPENSSL_free(s);
579         }
580
581 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
582         {
583         /* If the output buffering BIO is still in place, remove it
584          */
585         if (s->bbio != NULL)
586                 {
587                 if (s->wbio == s->bbio)
588                         {
589                         s->wbio=s->wbio->next_bio;
590                         s->bbio->next_bio=NULL;
591                         }
592                 }
593         if ((s->rbio != NULL) && (s->rbio != rbio))
594                 BIO_free_all(s->rbio);
595         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
596                 BIO_free_all(s->wbio);
597         s->rbio=rbio;
598         s->wbio=wbio;
599         }
600
601 BIO *SSL_get_rbio(const SSL *s)
602         { return(s->rbio); }
603
604 BIO *SSL_get_wbio(const SSL *s)
605         { return(s->wbio); }
606
607 int SSL_get_fd(const SSL *s)
608         {
609         return(SSL_get_rfd(s));
610         }
611
612 int SSL_get_rfd(const SSL *s)
613         {
614         int ret= -1;
615         BIO *b,*r;
616
617         b=SSL_get_rbio(s);
618         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
619         if (r != NULL)
620                 BIO_get_fd(r,&ret);
621         return(ret);
622         }
623
624 int SSL_get_wfd(const SSL *s)
625         {
626         int ret= -1;
627         BIO *b,*r;
628
629         b=SSL_get_wbio(s);
630         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
631         if (r != NULL)
632                 BIO_get_fd(r,&ret);
633         return(ret);
634         }
635
636 #ifndef OPENSSL_NO_SOCK
637 int SSL_set_fd(SSL *s,int fd)
638         {
639         int ret=0;
640         BIO *bio=NULL;
641
642         bio=BIO_new(BIO_s_socket());
643
644         if (bio == NULL)
645                 {
646                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
647                 goto err;
648                 }
649         BIO_set_fd(bio,fd,BIO_NOCLOSE);
650         SSL_set_bio(s,bio,bio);
651         ret=1;
652 err:
653         return(ret);
654         }
655
656 int SSL_set_wfd(SSL *s,int fd)
657         {
658         int ret=0;
659         BIO *bio=NULL;
660
661         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
662                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
663                 {
664                 bio=BIO_new(BIO_s_socket());
665
666                 if (bio == NULL)
667                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
668                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
669                 SSL_set_bio(s,SSL_get_rbio(s),bio);
670                 }
671         else
672                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
673         ret=1;
674 err:
675         return(ret);
676         }
677
678 int SSL_set_rfd(SSL *s,int fd)
679         {
680         int ret=0;
681         BIO *bio=NULL;
682
683         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
684                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
685                 {
686                 bio=BIO_new(BIO_s_socket());
687
688                 if (bio == NULL)
689                         {
690                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
691                         goto err;
692                         }
693                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
694                 SSL_set_bio(s,bio,SSL_get_wbio(s));
695                 }
696         else
697                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
698         ret=1;
699 err:
700         return(ret);
701         }
702 #endif
703
704
705 /* return length of latest Finished message we sent, copy to 'buf' */
706 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
707         {
708         size_t ret = 0;
709         
710         if (s->s3 != NULL)
711                 {
712                 ret = s->s3->tmp.finish_md_len;
713                 if (count > ret)
714                         count = ret;
715                 memcpy(buf, s->s3->tmp.finish_md, count);
716                 }
717         return ret;
718         }
719
720 /* return length of latest Finished message we expected, copy to 'buf' */
721 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
722         {
723         size_t ret = 0;
724         
725         if (s->s3 != NULL)
726                 {
727                 ret = s->s3->tmp.peer_finish_md_len;
728                 if (count > ret)
729                         count = ret;
730                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
731                 }
732         return ret;
733         }
734
735
736 int SSL_get_verify_mode(const SSL *s)
737         {
738         return(s->verify_mode);
739         }
740
741 int SSL_get_verify_depth(const SSL *s)
742         {
743         return X509_VERIFY_PARAM_get_depth(s->param);
744         }
745
746 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
747         {
748         return(s->verify_callback);
749         }
750
751 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
752         {
753         return(ctx->verify_mode);
754         }
755
756 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
757         {
758         return X509_VERIFY_PARAM_get_depth(ctx->param);
759         }
760
761 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
762         {
763         return(ctx->default_verify_callback);
764         }
765
766 void SSL_set_verify(SSL *s,int mode,
767                     int (*callback)(int ok,X509_STORE_CTX *ctx))
768         {
769         s->verify_mode=mode;
770         if (callback != NULL)
771                 s->verify_callback=callback;
772         }
773
774 void SSL_set_verify_depth(SSL *s,int depth)
775         {
776         X509_VERIFY_PARAM_set_depth(s->param, depth);
777         }
778
779 void SSL_set_read_ahead(SSL *s,int yes)
780         {
781         s->read_ahead=yes;
782         }
783
784 int SSL_get_read_ahead(const SSL *s)
785         {
786         return(s->read_ahead);
787         }
788
789 int SSL_pending(const SSL *s)
790         {
791         /* SSL_pending cannot work properly if read-ahead is enabled
792          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
793          * and it is impossible to fix since SSL_pending cannot report
794          * errors that may be observed while scanning the new data.
795          * (Note that SSL_pending() is often used as a boolean value,
796          * so we'd better not return -1.)
797          */
798         return(s->method->ssl_pending(s));
799         }
800
801 X509 *SSL_get_peer_certificate(const SSL *s)
802         {
803         X509 *r;
804         
805         if ((s == NULL) || (s->session == NULL))
806                 r=NULL;
807         else
808                 r=s->session->peer;
809
810         if (r == NULL) return(r);
811
812         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
813
814         return(r);
815         }
816
817 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
818         {
819         STACK_OF(X509) *r;
820         
821         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
822                 r=NULL;
823         else
824                 r=s->session->sess_cert->cert_chain;
825
826         /* If we are a client, cert_chain includes the peer's own
827          * certificate; if we are a server, it does not. */
828         
829         return(r);
830         }
831
832 /* Now in theory, since the calling process own 't' it should be safe to
833  * modify.  We need to be able to read f without being hassled */
834 void SSL_copy_session_id(SSL *t,const SSL *f)
835         {
836         CERT *tmp;
837
838         /* Do we need to to SSL locking? */
839         SSL_set_session(t,SSL_get_session(f));
840
841         /* what if we are setup as SSLv2 but want to talk SSLv3 or
842          * vice-versa */
843         if (t->method != f->method)
844                 {
845                 t->method->ssl_free(t); /* cleanup current */
846                 t->method=f->method;    /* change method */
847                 t->method->ssl_new(t);  /* setup new */
848                 }
849
850         tmp=t->cert;
851         if (f->cert != NULL)
852                 {
853                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
854                 t->cert=f->cert;
855                 }
856         else
857                 t->cert=NULL;
858         if (tmp != NULL) ssl_cert_free(tmp);
859         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
860         }
861
862 /* Fix this so it checks all the valid key/cert options */
863 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
864         {
865         if (    (ctx == NULL) ||
866                 (ctx->cert == NULL) ||
867                 (ctx->cert->key->x509 == NULL))
868                 {
869                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
870                 return(0);
871                 }
872         if      (ctx->cert->key->privatekey == NULL)
873                 {
874                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
875                 return(0);
876                 }
877         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
878         }
879
880 /* Fix this function so that it takes an optional type parameter */
881 int SSL_check_private_key(const SSL *ssl)
882         {
883         if (ssl == NULL)
884                 {
885                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
886                 return(0);
887                 }
888         if (ssl->cert == NULL)
889                 {
890                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
891                 return 0;
892                 }
893         if (ssl->cert->key->x509 == NULL)
894                 {
895                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
896                 return(0);
897                 }
898         if (ssl->cert->key->privatekey == NULL)
899                 {
900                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
901                 return(0);
902                 }
903         return(X509_check_private_key(ssl->cert->key->x509,
904                 ssl->cert->key->privatekey));
905         }
906
907 int SSL_accept(SSL *s)
908         {
909         if (s->handshake_func == 0)
910                 /* Not properly initialized yet */
911                 SSL_set_accept_state(s);
912
913         return(s->method->ssl_accept(s));
914         }
915
916 int SSL_connect(SSL *s)
917         {
918         if (s->handshake_func == 0)
919                 /* Not properly initialized yet */
920                 SSL_set_connect_state(s);
921
922         return(s->method->ssl_connect(s));
923         }
924
925 long SSL_get_default_timeout(const SSL *s)
926         {
927         return(s->method->get_timeout());
928         }
929
930 int SSL_read(SSL *s,void *buf,int num)
931         {
932         if (s->handshake_func == 0)
933                 {
934                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
935                 return -1;
936                 }
937
938         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
939                 {
940                 s->rwstate=SSL_NOTHING;
941                 return(0);
942                 }
943         return(s->method->ssl_read(s,buf,num));
944         }
945
946 int SSL_peek(SSL *s,void *buf,int num)
947         {
948         if (s->handshake_func == 0)
949                 {
950                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
951                 return -1;
952                 }
953
954         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
955                 {
956                 return(0);
957                 }
958         return(s->method->ssl_peek(s,buf,num));
959         }
960
961 int SSL_write(SSL *s,const void *buf,int num)
962         {
963         if (s->handshake_func == 0)
964                 {
965                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
966                 return -1;
967                 }
968
969         if (s->shutdown & SSL_SENT_SHUTDOWN)
970                 {
971                 s->rwstate=SSL_NOTHING;
972                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
973                 return(-1);
974                 }
975         return(s->method->ssl_write(s,buf,num));
976         }
977
978 int SSL_shutdown(SSL *s)
979         {
980         /* Note that this function behaves differently from what one might
981          * expect.  Return values are 0 for no success (yet),
982          * 1 for success; but calling it once is usually not enough,
983          * even if blocking I/O is used (see ssl3_shutdown).
984          */
985
986         if (s->handshake_func == 0)
987                 {
988                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
989                 return -1;
990                 }
991
992         if ((s != NULL) && !SSL_in_init(s))
993                 return(s->method->ssl_shutdown(s));
994         else
995                 return(1);
996         }
997
998 int SSL_renegotiate(SSL *s)
999         {
1000         if (s->new_session == 0)
1001                 {
1002                 s->new_session=1;
1003                 }
1004         return(s->method->ssl_renegotiate(s));
1005         }
1006
1007 int SSL_renegotiate_pending(SSL *s)
1008         {
1009         /* becomes true when negotiation is requested;
1010          * false again once a handshake has finished */
1011         return (s->new_session != 0);
1012         }
1013
1014 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
1015         {
1016         long l;
1017
1018         switch (cmd)
1019                 {
1020         case SSL_CTRL_GET_READ_AHEAD:
1021                 return(s->read_ahead);
1022         case SSL_CTRL_SET_READ_AHEAD:
1023                 l=s->read_ahead;
1024                 s->read_ahead=larg;
1025                 return(l);
1026
1027         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1028                 s->msg_callback_arg = parg;
1029                 return 1;
1030
1031         case SSL_CTRL_OPTIONS:
1032                 return(s->options|=larg);
1033         case SSL_CTRL_MODE:
1034                 return(s->mode|=larg);
1035         case SSL_CTRL_GET_MAX_CERT_LIST:
1036                 return(s->max_cert_list);
1037         case SSL_CTRL_SET_MAX_CERT_LIST:
1038                 l=s->max_cert_list;
1039                 s->max_cert_list=larg;
1040                 return(l);
1041         case SSL_CTRL_SET_MTU:
1042                 if (SSL_version(s) == DTLS1_VERSION ||
1043                     SSL_version(s) == DTLS1_BAD_VER)
1044                         {
1045                         s->d1->mtu = larg;
1046                         return larg;
1047                         }
1048                 return 0;
1049         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1050                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1051                         return 0;
1052                 s->max_send_fragment = larg;
1053                 return 1;
1054         default:
1055                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1056                 }
1057         }
1058
1059 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1060         {
1061         switch(cmd)
1062                 {
1063         case SSL_CTRL_SET_MSG_CALLBACK:
1064                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1065                 return 1;
1066                 
1067         default:
1068                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1069                 }
1070         }
1071
1072 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
1073         {
1074         return ctx->sessions;
1075         }
1076
1077 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1078         {
1079         long l;
1080
1081         switch (cmd)
1082                 {
1083         case SSL_CTRL_GET_READ_AHEAD:
1084                 return(ctx->read_ahead);
1085         case SSL_CTRL_SET_READ_AHEAD:
1086                 l=ctx->read_ahead;
1087                 ctx->read_ahead=larg;
1088                 return(l);
1089                 
1090         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1091                 ctx->msg_callback_arg = parg;
1092                 return 1;
1093
1094         case SSL_CTRL_GET_MAX_CERT_LIST:
1095                 return(ctx->max_cert_list);
1096         case SSL_CTRL_SET_MAX_CERT_LIST:
1097                 l=ctx->max_cert_list;
1098                 ctx->max_cert_list=larg;
1099                 return(l);
1100
1101         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1102                 l=ctx->session_cache_size;
1103                 ctx->session_cache_size=larg;
1104                 return(l);
1105         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1106                 return(ctx->session_cache_size);
1107         case SSL_CTRL_SET_SESS_CACHE_MODE:
1108                 l=ctx->session_cache_mode;
1109                 ctx->session_cache_mode=larg;
1110                 return(l);
1111         case SSL_CTRL_GET_SESS_CACHE_MODE:
1112                 return(ctx->session_cache_mode);
1113
1114         case SSL_CTRL_SESS_NUMBER:
1115                 return(lh_SSL_SESSION_num_items(ctx->sessions));
1116         case SSL_CTRL_SESS_CONNECT:
1117                 return(ctx->stats.sess_connect);
1118         case SSL_CTRL_SESS_CONNECT_GOOD:
1119                 return(ctx->stats.sess_connect_good);
1120         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1121                 return(ctx->stats.sess_connect_renegotiate);
1122         case SSL_CTRL_SESS_ACCEPT:
1123                 return(ctx->stats.sess_accept);
1124         case SSL_CTRL_SESS_ACCEPT_GOOD:
1125                 return(ctx->stats.sess_accept_good);
1126         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1127                 return(ctx->stats.sess_accept_renegotiate);
1128         case SSL_CTRL_SESS_HIT:
1129                 return(ctx->stats.sess_hit);
1130         case SSL_CTRL_SESS_CB_HIT:
1131                 return(ctx->stats.sess_cb_hit);
1132         case SSL_CTRL_SESS_MISSES:
1133                 return(ctx->stats.sess_miss);
1134         case SSL_CTRL_SESS_TIMEOUTS:
1135                 return(ctx->stats.sess_timeout);
1136         case SSL_CTRL_SESS_CACHE_FULL:
1137                 return(ctx->stats.sess_cache_full);
1138         case SSL_CTRL_OPTIONS:
1139                 return(ctx->options|=larg);
1140         case SSL_CTRL_MODE:
1141                 return(ctx->mode|=larg);
1142         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1143                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1144                         return 0;
1145                 ctx->max_send_fragment = larg;
1146                 return 1;
1147         default:
1148                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1149                 }
1150         }
1151
1152 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1153         {
1154         switch(cmd)
1155                 {
1156         case SSL_CTRL_SET_MSG_CALLBACK:
1157                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1158                 return 1;
1159
1160         default:
1161                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1162                 }
1163         }
1164
1165 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1166         {
1167         long l;
1168
1169         l=a->id-b->id;
1170         if (l == 0L)
1171                 return(0);
1172         else
1173                 return((l > 0)?1:-1);
1174         }
1175
1176 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1177                         const SSL_CIPHER * const *bp)
1178         {
1179         long l;
1180
1181         l=(*ap)->id-(*bp)->id;
1182         if (l == 0L)
1183                 return(0);
1184         else
1185                 return((l > 0)?1:-1);
1186         }
1187
1188 /** return a STACK of the ciphers available for the SSL and in order of
1189  * preference */
1190 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1191         {
1192         if (s != NULL)
1193                 {
1194                 if (s->cipher_list != NULL)
1195                         {
1196                         return(s->cipher_list);
1197                         }
1198                 else if ((s->ctx != NULL) &&
1199                         (s->ctx->cipher_list != NULL))
1200                         {
1201                         return(s->ctx->cipher_list);
1202                         }
1203                 }
1204         return(NULL);
1205         }
1206
1207 /** return a STACK of the ciphers available for the SSL and in order of
1208  * algorithm id */
1209 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1210         {
1211         if (s != NULL)
1212                 {
1213                 if (s->cipher_list_by_id != NULL)
1214                         {
1215                         return(s->cipher_list_by_id);
1216                         }
1217                 else if ((s->ctx != NULL) &&
1218                         (s->ctx->cipher_list_by_id != NULL))
1219                         {
1220                         return(s->ctx->cipher_list_by_id);
1221                         }
1222                 }
1223         return(NULL);
1224         }
1225
1226 /** The old interface to get the same thing as SSL_get_ciphers() */
1227 const char *SSL_get_cipher_list(const SSL *s,int n)
1228         {
1229         SSL_CIPHER *c;
1230         STACK_OF(SSL_CIPHER) *sk;
1231
1232         if (s == NULL) return(NULL);
1233         sk=SSL_get_ciphers(s);
1234         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1235                 return(NULL);
1236         c=sk_SSL_CIPHER_value(sk,n);
1237         if (c == NULL) return(NULL);
1238         return(c->name);
1239         }
1240
1241 /** specify the ciphers to be used by default by the SSL_CTX */
1242 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1243         {
1244         STACK_OF(SSL_CIPHER) *sk;
1245         
1246         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1247                 &ctx->cipher_list_by_id,str);
1248         /* ssl_create_cipher_list may return an empty stack if it
1249          * was unable to find a cipher matching the given rule string
1250          * (for example if the rule string specifies a cipher which
1251          * has been disabled). This is not an error as far as
1252          * ssl_create_cipher_list is concerned, and hence
1253          * ctx->cipher_list and ctx->cipher_list_by_id has been
1254          * updated. */
1255         if (sk == NULL)
1256                 return 0;
1257         else if (sk_SSL_CIPHER_num(sk) == 0)
1258                 {
1259                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1260                 return 0;
1261                 }
1262         return 1;
1263         }
1264
1265 /** specify the ciphers to be used by the SSL */
1266 int SSL_set_cipher_list(SSL *s,const char *str)
1267         {
1268         STACK_OF(SSL_CIPHER) *sk;
1269         
1270         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1271                 &s->cipher_list_by_id,str);
1272         /* see comment in SSL_CTX_set_cipher_list */
1273         if (sk == NULL)
1274                 return 0;
1275         else if (sk_SSL_CIPHER_num(sk) == 0)
1276                 {
1277                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1278                 return 0;
1279                 }
1280         return 1;
1281         }
1282
1283 /* works well for SSLv2, not so good for SSLv3 */
1284 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1285         {
1286         char *p;
1287         STACK_OF(SSL_CIPHER) *sk;
1288         SSL_CIPHER *c;
1289         int i;
1290
1291         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1292                 (len < 2))
1293                 return(NULL);
1294
1295         p=buf;
1296         sk=s->session->ciphers;
1297         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1298                 {
1299                 int n;
1300
1301                 c=sk_SSL_CIPHER_value(sk,i);
1302                 n=strlen(c->name);
1303                 if (n+1 > len)
1304                         {
1305                         if (p != buf)
1306                                 --p;
1307                         *p='\0';
1308                         return buf;
1309                         }
1310                 strcpy(p,c->name);
1311                 p+=n;
1312                 *(p++)=':';
1313                 len-=n+1;
1314                 }
1315         p[-1]='\0';
1316         return(buf);
1317         }
1318
1319 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1320                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1321         {
1322         int i,j=0;
1323         SSL_CIPHER *c;
1324         unsigned char *q;
1325 #ifndef OPENSSL_NO_KRB5
1326         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1327 #endif /* OPENSSL_NO_KRB5 */
1328
1329         if (sk == NULL) return(0);
1330         q=p;
1331
1332         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1333                 {
1334                 c=sk_SSL_CIPHER_value(sk,i);
1335 #ifndef OPENSSL_NO_KRB5
1336                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1337                     nokrb5)
1338                     continue;
1339 #endif /* OPENSSL_NO_KRB5 */
1340 #ifndef OPENSSL_NO_PSK
1341                 /* with PSK there must be client callback set */
1342                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1343                     s->psk_client_callback == NULL)
1344                         continue;
1345 #endif /* OPENSSL_NO_PSK */
1346                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1347                 p+=j;
1348                 }
1349         return(p-q);
1350         }
1351
1352 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1353                                                STACK_OF(SSL_CIPHER) **skp)
1354         {
1355         const SSL_CIPHER *c;
1356         STACK_OF(SSL_CIPHER) *sk;
1357         int i,n;
1358
1359         n=ssl_put_cipher_by_char(s,NULL,NULL);
1360         if ((num%n) != 0)
1361                 {
1362                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1363                 return(NULL);
1364                 }
1365         if ((skp == NULL) || (*skp == NULL))
1366                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1367         else
1368                 {
1369                 sk= *skp;
1370                 sk_SSL_CIPHER_zero(sk);
1371                 }
1372
1373         for (i=0; i<num; i+=n)
1374                 {
1375                 c=ssl_get_cipher_by_char(s,p);
1376                 p+=n;
1377                 if (c != NULL)
1378                         {
1379                         if (!sk_SSL_CIPHER_push(sk,c))
1380                                 {
1381                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1382                                 goto err;
1383                                 }
1384                         }
1385                 }
1386
1387         if (skp != NULL)
1388                 *skp=sk;
1389         return(sk);
1390 err:
1391         if ((skp == NULL) || (*skp == NULL))
1392                 sk_SSL_CIPHER_free(sk);
1393         return(NULL);
1394         }
1395
1396
1397 #ifndef OPENSSL_NO_TLSEXT
1398 /** return a servername extension value if provided in Client Hello, or NULL.
1399  * So far, only host_name types are defined (RFC 3546).
1400  */
1401
1402 const char *SSL_get_servername(const SSL *s, const int type)
1403         {
1404         if (type != TLSEXT_NAMETYPE_host_name)
1405                 return NULL;
1406
1407         return s->session && !s->tlsext_hostname ?
1408                 s->session->tlsext_hostname :
1409                 s->tlsext_hostname;
1410         }
1411
1412 int SSL_get_servername_type(const SSL *s)
1413         {
1414         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1415                 return TLSEXT_NAMETYPE_host_name;
1416         return -1;
1417         }
1418 #endif
1419
1420 static unsigned long ssl_session_hash(const SSL_SESSION *a)
1421         {
1422         unsigned long l;
1423
1424         l=(unsigned long)
1425                 ((unsigned int) a->session_id[0]     )|
1426                 ((unsigned int) a->session_id[1]<< 8L)|
1427                 ((unsigned long)a->session_id[2]<<16L)|
1428                 ((unsigned long)a->session_id[3]<<24L);
1429         return(l);
1430         }
1431
1432 /* NB: If this function (or indeed the hash function which uses a sort of
1433  * coarser function than this one) is changed, ensure
1434  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1435  * able to construct an SSL_SESSION that will collide with any existing session
1436  * with a matching session ID. */
1437 static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1438         {
1439         if (a->ssl_version != b->ssl_version)
1440                 return(1);
1441         if (a->session_id_length != b->session_id_length)
1442                 return(1);
1443         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1444         }
1445
1446 /* These wrapper functions should remain rather than redeclaring
1447  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1448  * variable. The reason is that the functions aren't static, they're exposed via
1449  * ssl.h. */
1450 static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
1451 static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
1452
1453 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1454         {
1455         SSL_CTX *ret=NULL;
1456
1457         if (meth == NULL)
1458                 {
1459                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1460                 return(NULL);
1461                 }
1462
1463         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1464                 {
1465                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1466                 goto err;
1467                 }
1468         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1469         if (ret == NULL)
1470                 goto err;
1471
1472         memset(ret,0,sizeof(SSL_CTX));
1473
1474         ret->method=meth;
1475
1476         ret->cert_store=NULL;
1477         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1478         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1479         ret->session_cache_head=NULL;
1480         ret->session_cache_tail=NULL;
1481
1482         /* We take the system default */
1483         ret->session_timeout=meth->get_timeout();
1484
1485         ret->new_session_cb=0;
1486         ret->remove_session_cb=0;
1487         ret->get_session_cb=0;
1488         ret->generate_session_id=0;
1489
1490         memset((char *)&ret->stats,0,sizeof(ret->stats));
1491
1492         ret->references=1;
1493         ret->quiet_shutdown=0;
1494
1495 /*      ret->cipher=NULL;*/
1496 /*      ret->s2->challenge=NULL;
1497         ret->master_key=NULL;
1498         ret->key_arg=NULL;
1499         ret->s2->conn_id=NULL; */
1500
1501         ret->info_callback=NULL;
1502
1503         ret->app_verify_callback=0;
1504         ret->app_verify_arg=NULL;
1505
1506         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1507         ret->read_ahead=0;
1508         ret->msg_callback=0;
1509         ret->msg_callback_arg=NULL;
1510         ret->verify_mode=SSL_VERIFY_NONE;
1511 #if 0
1512         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1513 #endif
1514         ret->sid_ctx_length=0;
1515         ret->default_verify_callback=NULL;
1516         if ((ret->cert=ssl_cert_new()) == NULL)
1517                 goto err;
1518
1519         ret->default_passwd_callback=0;
1520         ret->default_passwd_callback_userdata=NULL;
1521         ret->client_cert_cb=0;
1522         ret->app_gen_cookie_cb=0;
1523         ret->app_verify_cookie_cb=0;
1524
1525         ret->sessions=lh_SSL_SESSION_new();
1526         if (ret->sessions == NULL) goto err;
1527         ret->cert_store=X509_STORE_new();
1528         if (ret->cert_store == NULL) goto err;
1529
1530         ssl_create_cipher_list(ret->method,
1531                 &ret->cipher_list,&ret->cipher_list_by_id,
1532                 meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
1533         if (ret->cipher_list == NULL
1534             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1535                 {
1536                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1537                 goto err2;
1538                 }
1539
1540         ret->param = X509_VERIFY_PARAM_new();
1541         if (!ret->param)
1542                 goto err;
1543
1544         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1545                 {
1546                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1547                 goto err2;
1548                 }
1549         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1550                 {
1551                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1552                 goto err2;
1553                 }
1554         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1555                 {
1556                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1557                 goto err2;
1558                 }
1559
1560         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1561                 goto err;
1562
1563         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1564
1565         ret->extra_certs=NULL;
1566         ret->comp_methods=SSL_COMP_get_compression_methods();
1567
1568         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1569
1570 #ifndef OPENSSL_NO_TLSEXT
1571         ret->tlsext_servername_callback = 0;
1572         ret->tlsext_servername_arg = NULL;
1573         /* Setup RFC4507 ticket keys */
1574         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1575                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1576                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1577                 ret->options |= SSL_OP_NO_TICKET;
1578
1579         ret->tlsext_status_cb = 0;
1580         ret->tlsext_status_arg = NULL;
1581
1582 #endif
1583 #ifndef OPENSSL_NO_PSK
1584         ret->psk_identity_hint=NULL;
1585         ret->psk_client_callback=NULL;
1586         ret->psk_server_callback=NULL;
1587 #endif
1588 #ifndef OPENSSL_NO_BUF_FREELISTS
1589         ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
1590         ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1591         if (!ret->rbuf_freelist)
1592                 goto err;
1593         ret->rbuf_freelist->chunklen = 0;
1594         ret->rbuf_freelist->len = 0;
1595         ret->rbuf_freelist->head = NULL;
1596         ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
1597         if (!ret->wbuf_freelist)
1598                 {
1599                 OPENSSL_free(ret->rbuf_freelist);
1600                 goto err;
1601                 }
1602         ret->wbuf_freelist->chunklen = 0;
1603         ret->wbuf_freelist->len = 0;
1604         ret->wbuf_freelist->head = NULL;
1605 #endif
1606 #ifndef OPENSSL_NO_ENGINE
1607         ret->client_cert_engine = NULL;
1608 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
1609 #define eng_strx(x)     #x
1610 #define eng_str(x)      eng_strx(x)
1611         /* Use specific client engine automatically... ignore errors */
1612         {
1613         ENGINE *eng;
1614         eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1615         if (!eng)
1616                 {
1617                 ERR_clear_error();
1618                 ENGINE_load_builtin_engines();
1619                 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
1620                 }
1621         if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
1622                 ERR_clear_error();
1623         }
1624 #endif
1625 #endif
1626
1627         return(ret);
1628 err:
1629         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1630 err2:
1631         if (ret != NULL) SSL_CTX_free(ret);
1632         return(NULL);
1633         }
1634
1635 #if 0
1636 static void SSL_COMP_free(SSL_COMP *comp)
1637     { OPENSSL_free(comp); }
1638 #endif
1639
1640 #ifndef OPENSSL_NO_BUF_FREELISTS
1641 static void
1642 ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
1643         {
1644         SSL3_BUF_FREELIST_ENTRY *ent, *next;
1645         for (ent = list->head; ent; ent = next)
1646                 {
1647                 next = ent->next;
1648                 OPENSSL_free(ent);
1649                 }
1650         OPENSSL_free(list);
1651         }
1652 #endif
1653
1654 void SSL_CTX_free(SSL_CTX *a)
1655         {
1656         int i;
1657
1658         if (a == NULL) return;
1659
1660         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1661 #ifdef REF_PRINT
1662         REF_PRINT("SSL_CTX",a);
1663 #endif
1664         if (i > 0) return;
1665 #ifdef REF_CHECK
1666         if (i < 0)
1667                 {
1668                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1669                 abort(); /* ok */
1670                 }
1671 #endif
1672
1673         if (a->param)
1674                 X509_VERIFY_PARAM_free(a->param);
1675
1676         /*
1677          * Free internal session cache. However: the remove_cb() may reference
1678          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1679          * after the sessions were flushed.
1680          * As the ex_data handling routines might also touch the session cache,
1681          * the most secure solution seems to be: empty (flush) the cache, then
1682          * free ex_data, then finally free the cache.
1683          * (See ticket [openssl.org #212].)
1684          */
1685         if (a->sessions != NULL)
1686                 SSL_CTX_flush_sessions(a,0);
1687
1688         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1689
1690         if (a->sessions != NULL)
1691                 lh_SSL_SESSION_free(a->sessions);
1692
1693         if (a->cert_store != NULL)
1694                 X509_STORE_free(a->cert_store);
1695         if (a->cipher_list != NULL)
1696                 sk_SSL_CIPHER_free(a->cipher_list);
1697         if (a->cipher_list_by_id != NULL)
1698                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1699         if (a->cert != NULL)
1700                 ssl_cert_free(a->cert);
1701         if (a->client_CA != NULL)
1702                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1703         if (a->extra_certs != NULL)
1704                 sk_X509_pop_free(a->extra_certs,X509_free);
1705 #if 0 /* This should never be done, since it removes a global database */
1706         if (a->comp_methods != NULL)
1707                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1708 #else
1709         a->comp_methods = NULL;
1710 #endif
1711
1712 #ifndef OPENSSL_NO_PSK
1713         if (a->psk_identity_hint)
1714                 OPENSSL_free(a->psk_identity_hint);
1715 #endif
1716 #ifndef OPENSSL_NO_ENGINE
1717         if (a->client_cert_engine)
1718                 ENGINE_finish(a->client_cert_engine);
1719 #endif
1720
1721 #ifndef OPENSSL_NO_BUF_FREELISTS
1722         if (a->wbuf_freelist)
1723                 ssl_buf_freelist_free(a->wbuf_freelist);
1724         if (a->rbuf_freelist)
1725                 ssl_buf_freelist_free(a->rbuf_freelist);
1726 #endif
1727
1728         OPENSSL_free(a);
1729         }
1730
1731 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1732         {
1733         ctx->default_passwd_callback=cb;
1734         }
1735
1736 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1737         {
1738         ctx->default_passwd_callback_userdata=u;
1739         }
1740
1741 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1742         {
1743         ctx->app_verify_callback=cb;
1744         ctx->app_verify_arg=arg;
1745         }
1746
1747 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1748         {
1749         ctx->verify_mode=mode;
1750         ctx->default_verify_callback=cb;
1751         }
1752
1753 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1754         {
1755         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1756         }
1757
1758 void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
1759         {
1760         CERT_PKEY *cpk;
1761         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1762         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1763         int rsa_tmp_export,dh_tmp_export,kl;
1764         unsigned long mask_k,mask_a,emask_k,emask_a;
1765         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1766 #ifndef OPENSSL_NO_ECDH
1767         int have_ecdh_tmp;
1768 #endif
1769         X509 *x = NULL;
1770         EVP_PKEY *ecc_pkey = NULL;
1771         int signature_nid = 0;
1772
1773         if (c == NULL) return;
1774
1775         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1776
1777 #ifndef OPENSSL_NO_RSA
1778         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1779         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1780                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1781 #else
1782         rsa_tmp=rsa_tmp_export=0;
1783 #endif
1784 #ifndef OPENSSL_NO_DH
1785         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1786         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1787                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1788 #else
1789         dh_tmp=dh_tmp_export=0;
1790 #endif
1791
1792 #ifndef OPENSSL_NO_ECDH
1793         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1794 #endif
1795         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1796         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1797         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1798         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1799         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1800         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1801         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1802         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1803         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1804         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1805         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1806 /* FIX THIS EAY EAY EAY */
1807         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1808         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1809         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1810         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1811         mask_k=0;
1812         mask_a=0;
1813         emask_k=0;
1814         emask_a=0;
1815
1816         
1817
1818 #ifdef CIPHER_DEBUG
1819         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1820                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1821                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1822 #endif
1823         
1824         cpk = &(c->pkeys[SSL_PKEY_GOST01]);
1825         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1826                 mask_k |= SSL_kGOST;
1827                 mask_a |= SSL_aGOST01;
1828         }
1829         cpk = &(c->pkeys[SSL_PKEY_GOST94]);
1830         if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
1831                 mask_k |= SSL_kGOST;
1832                 mask_a |= SSL_aGOST94;
1833         }
1834
1835         if (rsa_enc || (rsa_tmp && rsa_sign))
1836                 mask_k|=SSL_kRSA;
1837         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1838                 emask_k|=SSL_kRSA;
1839
1840 #if 0
1841         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1842         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1843                 (rsa_enc || rsa_sign || dsa_sign))
1844                 mask_k|=SSL_kEDH;
1845         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1846                 (rsa_enc || rsa_sign || dsa_sign))
1847                 emask_k|=SSL_kEDH;
1848 #endif
1849
1850         if (dh_tmp_export)
1851                 emask_k|=SSL_kEDH;
1852
1853         if (dh_tmp)
1854                 mask_k|=SSL_kEDH;
1855
1856         if (dh_rsa) mask_k|=SSL_kDHr;
1857         if (dh_rsa_export) emask_k|=SSL_kDHr;
1858
1859         if (dh_dsa) mask_k|=SSL_kDHd;
1860         if (dh_dsa_export) emask_k|=SSL_kDHd;
1861
1862         if (rsa_enc || rsa_sign)
1863                 {
1864                 mask_a|=SSL_aRSA;
1865                 emask_a|=SSL_aRSA;
1866                 }
1867
1868         if (dsa_sign)
1869                 {
1870                 mask_a|=SSL_aDSS;
1871                 emask_a|=SSL_aDSS;
1872                 }
1873
1874         mask_a|=SSL_aNULL;
1875         emask_a|=SSL_aNULL;
1876
1877 #ifndef OPENSSL_NO_KRB5
1878         mask_k|=SSL_kKRB5;
1879         mask_a|=SSL_aKRB5;
1880         emask_k|=SSL_kKRB5;
1881         emask_a|=SSL_aKRB5;
1882 #endif
1883
1884         /* An ECC certificate may be usable for ECDH and/or
1885          * ECDSA cipher suites depending on the key usage extension.
1886          */
1887         if (have_ecc_cert)
1888                 {
1889                 /* This call populates extension flags (ex_flags) */
1890                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1891                 X509_check_purpose(x, -1, 0);
1892                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1893                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1894                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1895                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1896                 ecc_pkey = X509_get_pubkey(x);
1897                 ecc_pkey_size = (ecc_pkey != NULL) ?
1898                     EVP_PKEY_bits(ecc_pkey) : 0;
1899                 EVP_PKEY_free(ecc_pkey);
1900                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1901                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1902 #ifndef OPENSSL_NO_ECDH
1903                 if (ecdh_ok)
1904                         {
1905                         const char *sig = OBJ_nid2ln(signature_nid);
1906                         if (sig == NULL)
1907                                 {
1908                                 ERR_clear_error();
1909                                 sig = "unknown";
1910                                 }
1911                                 
1912                         if (strstr(sig, "WithRSA"))
1913                                 {
1914                                 mask_k|=SSL_kECDHr;
1915                                 mask_a|=SSL_aECDH;
1916                                 if (ecc_pkey_size <= 163)
1917                                         {
1918                                         emask_k|=SSL_kECDHr;
1919                                         emask_a|=SSL_aECDH;
1920                                         }
1921                                 }
1922
1923                         if (signature_nid == NID_ecdsa_with_SHA1)
1924                                 {
1925                                 mask_k|=SSL_kECDHe;
1926                                 mask_a|=SSL_aECDH;
1927                                 if (ecc_pkey_size <= 163)
1928                                         {
1929                                         emask_k|=SSL_kECDHe;
1930                                         emask_a|=SSL_aECDH;
1931                                         }
1932                                 }
1933                         }
1934 #endif
1935 #ifndef OPENSSL_NO_ECDSA
1936                 if (ecdsa_ok)
1937                         {
1938                         mask_a|=SSL_aECDSA;
1939                         emask_a|=SSL_aECDSA;
1940                         }
1941 #endif
1942                 }
1943
1944 #ifndef OPENSSL_NO_ECDH
1945         if (have_ecdh_tmp)
1946                 {
1947                 mask_k|=SSL_kEECDH;
1948                 emask_k|=SSL_kEECDH;
1949                 }
1950 #endif
1951
1952 #ifndef OPENSSL_NO_PSK
1953         mask_k |= SSL_kPSK;
1954         mask_a |= SSL_aPSK;
1955         emask_k |= SSL_kPSK;
1956         emask_a |= SSL_aPSK;
1957 #endif
1958
1959         c->mask_k=mask_k;
1960         c->mask_a=mask_a;
1961         c->export_mask_k=emask_k;
1962         c->export_mask_a=emask_a;
1963         c->valid=1;
1964         }
1965
1966 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1967 #define ku_reject(x, usage) \
1968         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1969
1970 #ifndef OPENSSL_NO_EC
1971
1972 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
1973         {
1974         unsigned long alg_k, alg_a;
1975         EVP_PKEY *pkey = NULL;
1976         int keysize = 0;
1977         int signature_nid = 0;
1978
1979         alg_k = cs->algorithm_mkey;
1980         alg_a = cs->algorithm_auth;
1981
1982         if (SSL_C_IS_EXPORT(cs))
1983                 {
1984                 /* ECDH key length in export ciphers must be <= 163 bits */
1985                 pkey = X509_get_pubkey(x);
1986                 if (pkey == NULL) return 0;
1987                 keysize = EVP_PKEY_bits(pkey);
1988                 EVP_PKEY_free(pkey);
1989                 if (keysize > 163) return 0;
1990                 }
1991
1992         /* This call populates the ex_flags field correctly */
1993         X509_check_purpose(x, -1, 0);
1994         if ((x->sig_alg) && (x->sig_alg->algorithm))
1995                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1996         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1997                 {
1998                 /* key usage, if present, must allow key agreement */
1999                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
2000                         {
2001                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
2002                         return 0;
2003                         }
2004                 if (alg_k & SSL_kECDHe)
2005                         {
2006                         /* signature alg must be ECDSA */
2007                         if (signature_nid != NID_ecdsa_with_SHA1)
2008                                 {
2009                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
2010                                 return 0;
2011                                 }
2012                         }
2013                 if (alg_k & SSL_kECDHr)
2014                         {
2015                         /* signature alg must be RSA */
2016
2017                         const char *sig = OBJ_nid2ln(signature_nid);
2018                         if (sig == NULL)
2019                                 {
2020                                 ERR_clear_error();
2021                                 sig = "unknown";
2022                                 }
2023                         if (strstr(sig, "WithRSA") == NULL)
2024                                 {
2025                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
2026                                 return 0;
2027                                 }
2028                         }
2029                 }
2030         if (alg_a & SSL_aECDSA)
2031                 {
2032                 /* key usage, if present, must allow signing */
2033                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
2034                         {
2035                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
2036                         return 0;
2037                         }
2038                 }
2039
2040         return 1;  /* all checks are ok */
2041         }
2042
2043 #endif
2044
2045 /* THIS NEEDS CLEANING UP */
2046 X509 *ssl_get_server_send_cert(SSL *s)
2047         {
2048         unsigned long alg_k,alg_a,mask_k,mask_a;
2049         CERT *c;
2050         int i,is_export;
2051
2052         c=s->cert;
2053         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
2054         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
2055         if (is_export)
2056                 {
2057                 mask_k = c->export_mask_k;
2058                 mask_a = c->export_mask_a;
2059                 }
2060         else
2061                 {
2062                 mask_k = c->mask_k;
2063                 mask_a = c->mask_a;
2064                 }
2065         
2066         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2067         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2068
2069         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2070                 {
2071                 /* we don't need to look at SSL_kEECDH
2072                  * since no certificate is needed for
2073                  * anon ECDH and for authenticated
2074                  * EECDH, the check for the auth
2075                  * algorithm will set i correctly
2076                  * NOTE: For ECDH-RSA, we need an ECC
2077                  * not an RSA cert but for EECDH-RSA
2078                  * we need an RSA cert. Placing the
2079                  * checks for SSL_kECDH before RSA
2080                  * checks ensures the correct cert is chosen.
2081                  */
2082                 i=SSL_PKEY_ECC;
2083                 }
2084         else if (alg_a & SSL_aECDSA)
2085                 {
2086                 i=SSL_PKEY_ECC;
2087                 }
2088         else if (alg_k & SSL_kDHr)
2089                 i=SSL_PKEY_DH_RSA;
2090         else if (alg_k & SSL_kDHd)
2091                 i=SSL_PKEY_DH_DSA;
2092         else if (alg_a & SSL_aDSS)
2093                 i=SSL_PKEY_DSA_SIGN;
2094         else if (alg_a & SSL_aRSA)
2095                 {
2096                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
2097                         i=SSL_PKEY_RSA_SIGN;
2098                 else
2099                         i=SSL_PKEY_RSA_ENC;
2100                 }
2101         else if (alg_a & SSL_aKRB5)
2102                 {
2103                 /* VRS something else here? */
2104                 return(NULL);
2105                 }
2106         else if (alg_a & SSL_aGOST94) 
2107                 i=SSL_PKEY_GOST94;
2108         else if (alg_a & SSL_aGOST01)
2109                 i=SSL_PKEY_GOST01;
2110         else /* if (alg_a & SSL_aNULL) */
2111                 {
2112                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2113                 return(NULL);
2114                 }
2115         if (c->pkeys[i].x509 == NULL) return(NULL);
2116
2117         return(c->pkeys[i].x509);
2118         }
2119
2120 EVP_PKEY *ssl_get_sign_pkey(SSL *s,const SSL_CIPHER *cipher)
2121         {
2122         unsigned long alg_a;
2123         CERT *c;
2124
2125         alg_a = cipher->algorithm_auth;
2126         c=s->cert;
2127
2128         if ((alg_a & SSL_aDSS) &&
2129                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2130                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2131         else if (alg_a & SSL_aRSA)
2132                 {
2133                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2134                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2135                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2136                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2137                 else
2138                         return(NULL);
2139                 }
2140         else if ((alg_a & SSL_aECDSA) &&
2141                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2142                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2143         else /* if (alg_a & SSL_aNULL) */
2144                 {
2145                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2146                 return(NULL);
2147                 }
2148         }
2149
2150 void ssl_update_cache(SSL *s,int mode)
2151         {
2152         int i;
2153
2154         /* If the session_id_length is 0, we are not supposed to cache it,
2155          * and it would be rather hard to do anyway :-) */
2156         if (s->session->session_id_length == 0) return;
2157
2158         i=s->session_ctx->session_cache_mode;
2159         if ((i & mode) && (!s->hit)
2160                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2161                     || SSL_CTX_add_session(s->session_ctx,s->session))
2162                 && (s->session_ctx->new_session_cb != NULL))
2163                 {
2164                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2165                 if (!s->session_ctx->new_session_cb(s,s->session))
2166                         SSL_SESSION_free(s->session);
2167                 }
2168
2169         /* auto flush every 255 connections */
2170         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2171                 ((i & mode) == mode))
2172                 {
2173                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2174                         ?s->session_ctx->stats.sess_connect_good
2175                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2176                         {
2177                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2178                         }
2179                 }
2180         }
2181
2182 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2183         {
2184         return(s->method);
2185         }
2186
2187 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2188         {
2189         int conn= -1;
2190         int ret=1;
2191
2192         if (s->method != meth)
2193                 {
2194                 if (s->handshake_func != NULL)
2195                         conn=(s->handshake_func == s->method->ssl_connect);
2196
2197                 if (s->method->version == meth->version)
2198                         s->method=meth;
2199                 else
2200                         {
2201                         s->method->ssl_free(s);
2202                         s->method=meth;
2203                         ret=s->method->ssl_new(s);
2204                         }
2205
2206                 if (conn == 1)
2207                         s->handshake_func=meth->ssl_connect;
2208                 else if (conn == 0)
2209                         s->handshake_func=meth->ssl_accept;
2210                 }
2211         return(ret);
2212         }
2213
2214 int SSL_get_error(const SSL *s,int i)
2215         {
2216         int reason;
2217         unsigned long l;
2218         BIO *bio;
2219
2220         if (i > 0) return(SSL_ERROR_NONE);
2221
2222         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2223          * etc, where we do encode the error */
2224         if ((l=ERR_peek_error()) != 0)
2225                 {
2226                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2227                         return(SSL_ERROR_SYSCALL);
2228                 else
2229                         return(SSL_ERROR_SSL);
2230                 }
2231
2232         if ((i < 0) && SSL_want_read(s))
2233                 {
2234                 bio=SSL_get_rbio(s);
2235                 if (BIO_should_read(bio))
2236                         return(SSL_ERROR_WANT_READ);
2237                 else if (BIO_should_write(bio))
2238                         /* This one doesn't make too much sense ... We never try
2239                          * to write to the rbio, and an application program where
2240                          * rbio and wbio are separate couldn't even know what it
2241                          * should wait for.
2242                          * However if we ever set s->rwstate incorrectly
2243                          * (so that we have SSL_want_read(s) instead of
2244                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2245                          * this test works around that bug; so it might be safer
2246                          * to keep it. */
2247                         return(SSL_ERROR_WANT_WRITE);
2248                 else if (BIO_should_io_special(bio))
2249                         {
2250                         reason=BIO_get_retry_reason(bio);
2251                         if (reason == BIO_RR_CONNECT)
2252                                 return(SSL_ERROR_WANT_CONNECT);
2253                         else if (reason == BIO_RR_ACCEPT)
2254                                 return(SSL_ERROR_WANT_ACCEPT);
2255                         else
2256                                 return(SSL_ERROR_SYSCALL); /* unknown */
2257                         }
2258                 }
2259
2260         if ((i < 0) && SSL_want_write(s))
2261                 {
2262                 bio=SSL_get_wbio(s);
2263                 if (BIO_should_write(bio))
2264                         return(SSL_ERROR_WANT_WRITE);
2265                 else if (BIO_should_read(bio))
2266                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2267                         return(SSL_ERROR_WANT_READ);
2268                 else if (BIO_should_io_special(bio))
2269                         {
2270                         reason=BIO_get_retry_reason(bio);
2271                         if (reason == BIO_RR_CONNECT)
2272                                 return(SSL_ERROR_WANT_CONNECT);
2273                         else if (reason == BIO_RR_ACCEPT)
2274                                 return(SSL_ERROR_WANT_ACCEPT);
2275                         else
2276                                 return(SSL_ERROR_SYSCALL);
2277                         }
2278                 }
2279         if ((i < 0) && SSL_want_x509_lookup(s))
2280                 {
2281                 return(SSL_ERROR_WANT_X509_LOOKUP);
2282                 }
2283
2284         if (i == 0)
2285                 {
2286                 if (s->version == SSL2_VERSION)
2287                         {
2288                         /* assume it is the socket being closed */
2289                         return(SSL_ERROR_ZERO_RETURN);
2290                         }
2291                 else
2292                         {
2293                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2294                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2295                                 return(SSL_ERROR_ZERO_RETURN);
2296                         }
2297                 }
2298         return(SSL_ERROR_SYSCALL);
2299         }
2300
2301 int SSL_do_handshake(SSL *s)
2302         {
2303         int ret=1;
2304
2305         if (s->handshake_func == NULL)
2306                 {
2307                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2308                 return(-1);
2309                 }
2310
2311         s->method->ssl_renegotiate_check(s);
2312
2313         if (SSL_in_init(s) || SSL_in_before(s))
2314                 {
2315                 ret=s->handshake_func(s);
2316                 }
2317         return(ret);
2318         }
2319
2320 /* For the next 2 functions, SSL_clear() sets shutdown and so
2321  * one of these calls will reset it */
2322 void SSL_set_accept_state(SSL *s)
2323         {
2324         s->server=1;
2325         s->shutdown=0;
2326         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2327         s->handshake_func=s->method->ssl_accept;
2328         /* clear the current cipher */
2329         ssl_clear_cipher_ctx(s);
2330         ssl_clear_hash_ctx(&s->read_hash);
2331         ssl_clear_hash_ctx(&s->write_hash);
2332         }
2333
2334 void SSL_set_connect_state(SSL *s)
2335         {
2336         s->server=0;
2337         s->shutdown=0;
2338         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2339         s->handshake_func=s->method->ssl_connect;
2340         /* clear the current cipher */
2341         ssl_clear_cipher_ctx(s);
2342         ssl_clear_hash_ctx(&s->read_hash);
2343         ssl_clear_hash_ctx(&s->write_hash);
2344         }
2345
2346 int ssl_undefined_function(SSL *s)
2347         {
2348         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2349         return(0);
2350         }
2351
2352 int ssl_undefined_void_function(void)
2353         {
2354         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2355         return(0);
2356         }
2357
2358 int ssl_undefined_const_function(const SSL *s)
2359         {
2360         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2361         return(0);
2362         }
2363
2364 SSL_METHOD *ssl_bad_method(int ver)
2365         {
2366         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2367         return(NULL);
2368         }
2369
2370 const char *SSL_get_version(const SSL *s)
2371         {
2372         if (s->version == TLS1_VERSION)
2373                 return("TLSv1");
2374         else if (s->version == SSL3_VERSION)
2375                 return("SSLv3");
2376         else if (s->version == SSL2_VERSION)
2377                 return("SSLv2");
2378         else
2379                 return("unknown");
2380         }
2381
2382 SSL *SSL_dup(SSL *s)
2383         {
2384         STACK_OF(X509_NAME) *sk;
2385         X509_NAME *xn;
2386         SSL *ret;
2387         int i;
2388         
2389         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2390             return(NULL);
2391
2392         ret->version = s->version;
2393         ret->type = s->type;
2394         ret->method = s->method;
2395
2396         if (s->session != NULL)
2397                 {
2398                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2399                 SSL_copy_session_id(ret,s);
2400                 }
2401         else
2402                 {
2403                 /* No session has been established yet, so we have to expect
2404                  * that s->cert or ret->cert will be changed later --
2405                  * they should not both point to the same object,
2406                  * and thus we can't use SSL_copy_session_id. */
2407
2408                 ret->method->ssl_free(ret);
2409                 ret->method = s->method;
2410                 ret->method->ssl_new(ret);
2411
2412                 if (s->cert != NULL)
2413                         {
2414                         if (ret->cert != NULL)
2415                                 {
2416                                 ssl_cert_free(ret->cert);
2417                                 }
2418                         ret->cert = ssl_cert_dup(s->cert);
2419                         if (ret->cert == NULL)
2420                                 goto err;
2421                         }
2422                                 
2423                 SSL_set_session_id_context(ret,
2424                         s->sid_ctx, s->sid_ctx_length);
2425                 }
2426
2427         ret->options=s->options;
2428         ret->mode=s->mode;
2429         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2430         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2431         ret->msg_callback = s->msg_callback;
2432         ret->msg_callback_arg = s->msg_callback_arg;
2433         SSL_set_verify(ret,SSL_get_verify_mode(s),
2434                 SSL_get_verify_callback(s));
2435         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2436         ret->generate_session_id = s->generate_session_id;
2437
2438         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2439         
2440         ret->debug=s->debug;
2441
2442         /* copy app data, a little dangerous perhaps */
2443         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2444                 goto err;
2445
2446         /* setup rbio, and wbio */
2447         if (s->rbio != NULL)
2448                 {
2449                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2450                         goto err;
2451                 }
2452         if (s->wbio != NULL)
2453                 {
2454                 if (s->wbio != s->rbio)
2455                         {
2456                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2457                                 goto err;
2458                         }
2459                 else
2460                         ret->wbio=ret->rbio;
2461                 }
2462         ret->rwstate = s->rwstate;
2463         ret->in_handshake = s->in_handshake;
2464         ret->handshake_func = s->handshake_func;
2465         ret->server = s->server;
2466         ret->new_session = s->new_session;
2467         ret->quiet_shutdown = s->quiet_shutdown;
2468         ret->shutdown=s->shutdown;
2469         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2470         ret->rstate=s->rstate;
2471         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2472         ret->hit=s->hit;
2473
2474         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2475
2476         /* dup the cipher_list and cipher_list_by_id stacks */
2477         if (s->cipher_list != NULL)
2478                 {
2479                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2480                         goto err;
2481                 }
2482         if (s->cipher_list_by_id != NULL)
2483                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2484                         == NULL)
2485                         goto err;
2486
2487         /* Dup the client_CA list */
2488         if (s->client_CA != NULL)
2489                 {
2490                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2491                 ret->client_CA=sk;
2492                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2493                         {
2494                         xn=sk_X509_NAME_value(sk,i);
2495                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2496                                 {
2497                                 X509_NAME_free(xn);
2498                                 goto err;
2499                                 }
2500                         }
2501                 }
2502
2503         if (0)
2504                 {
2505 err:
2506                 if (ret != NULL) SSL_free(ret);
2507                 ret=NULL;
2508                 }
2509         return(ret);
2510         }
2511
2512 void ssl_clear_cipher_ctx(SSL *s)
2513         {
2514         if (s->enc_read_ctx != NULL)
2515                 {
2516                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2517                 OPENSSL_free(s->enc_read_ctx);
2518                 s->enc_read_ctx=NULL;
2519                 }
2520         if (s->enc_write_ctx != NULL)
2521                 {
2522                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2523                 OPENSSL_free(s->enc_write_ctx);
2524                 s->enc_write_ctx=NULL;
2525                 }
2526 #ifndef OPENSSL_NO_COMP
2527         if (s->expand != NULL)
2528                 {
2529                 COMP_CTX_free(s->expand);
2530                 s->expand=NULL;
2531                 }
2532         if (s->compress != NULL)
2533                 {
2534                 COMP_CTX_free(s->compress);
2535                 s->compress=NULL;
2536                 }
2537 #endif
2538         }
2539
2540 /* Fix this function so that it takes an optional type parameter */
2541 X509 *SSL_get_certificate(const SSL *s)
2542         {
2543         if (s->cert != NULL)
2544                 return(s->cert->key->x509);
2545         else
2546                 return(NULL);
2547         }
2548
2549 /* Fix this function so that it takes an optional type parameter */
2550 EVP_PKEY *SSL_get_privatekey(SSL *s)
2551         {
2552         if (s->cert != NULL)
2553                 return(s->cert->key->privatekey);
2554         else
2555                 return(NULL);
2556         }
2557
2558 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2559         {
2560         if ((s->session != NULL) && (s->session->cipher != NULL))
2561                 return(s->session->cipher);
2562         return(NULL);
2563         }
2564 #ifdef OPENSSL_NO_COMP
2565 const void *SSL_get_current_compression(SSL *s)
2566         {
2567         return NULL;
2568         }
2569 const void *SSL_get_current_expansion(SSL *s)
2570         {
2571         return NULL;
2572         }
2573 #else
2574
2575 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2576         {
2577         if (s->compress != NULL)
2578                 return(s->compress->meth);
2579         return(NULL);
2580         }
2581
2582 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2583         {
2584         if (s->expand != NULL)
2585                 return(s->expand->meth);
2586         return(NULL);
2587         }
2588 #endif
2589
2590 int ssl_init_wbio_buffer(SSL *s,int push)
2591         {
2592         BIO *bbio;
2593
2594         if (s->bbio == NULL)
2595                 {
2596                 bbio=BIO_new(BIO_f_buffer());
2597                 if (bbio == NULL) return(0);
2598                 s->bbio=bbio;
2599                 }
2600         else
2601                 {
2602                 bbio=s->bbio;
2603                 if (s->bbio == s->wbio)
2604                         s->wbio=BIO_pop(s->wbio);
2605                 }
2606         (void)BIO_reset(bbio);
2607 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2608         if (!BIO_set_read_buffer_size(bbio,1))
2609                 {
2610                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2611                 return(0);
2612                 }
2613         if (push)
2614                 {
2615                 if (s->wbio != bbio)
2616                         s->wbio=BIO_push(bbio,s->wbio);
2617                 }
2618         else
2619                 {
2620                 if (s->wbio == bbio)
2621                         s->wbio=BIO_pop(bbio);
2622                 }
2623         return(1);
2624         }
2625
2626 void ssl_free_wbio_buffer(SSL *s)
2627         {
2628         if (s->bbio == NULL) return;
2629
2630         if (s->bbio == s->wbio)
2631                 {
2632                 /* remove buffering */
2633                 s->wbio=BIO_pop(s->wbio);
2634 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2635                 assert(s->wbio != NULL);
2636 #endif
2637         }
2638         BIO_free(s->bbio);
2639         s->bbio=NULL;
2640         }
2641         
2642 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2643         {
2644         ctx->quiet_shutdown=mode;
2645         }
2646
2647 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2648         {
2649         return(ctx->quiet_shutdown);
2650         }
2651
2652 void SSL_set_quiet_shutdown(SSL *s,int mode)
2653         {
2654         s->quiet_shutdown=mode;
2655         }
2656
2657 int SSL_get_quiet_shutdown(const SSL *s)
2658         {
2659         return(s->quiet_shutdown);
2660         }
2661
2662 void SSL_set_shutdown(SSL *s,int mode)
2663         {
2664         s->shutdown=mode;
2665         }
2666
2667 int SSL_get_shutdown(const SSL *s)
2668         {
2669         return(s->shutdown);
2670         }
2671
2672 int SSL_version(const SSL *s)
2673         {
2674         return(s->version);
2675         }
2676
2677 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2678         {
2679         return(ssl->ctx);
2680         }
2681
2682 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2683         {
2684         if (ssl->ctx == ctx)
2685                 return ssl->ctx;
2686 #ifndef OPENSSL_NO_TLSEXT
2687         if (ctx == NULL)
2688                 ctx = ssl->initial_ctx;
2689 #endif
2690         if (ssl->cert != NULL)
2691                 ssl_cert_free(ssl->cert);
2692         ssl->cert = ssl_cert_dup(ctx->cert);
2693         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2694         if (ssl->ctx != NULL)
2695                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2696         ssl->ctx = ctx;
2697         return(ssl->ctx);
2698         }
2699
2700 #ifndef OPENSSL_NO_STDIO
2701 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2702         {
2703         return(X509_STORE_set_default_paths(ctx->cert_store));
2704         }
2705
2706 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2707                 const char *CApath)
2708         {
2709         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2710         }
2711 #endif
2712
2713 void SSL_set_info_callback(SSL *ssl,
2714         void (*cb)(const SSL *ssl,int type,int val))
2715         {
2716         ssl->info_callback=cb;
2717         }
2718
2719 /* One compiler (Diab DCC) doesn't like argument names in returned
2720    function pointer.  */
2721 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2722         {
2723         return ssl->info_callback;
2724         }
2725
2726 int SSL_state(const SSL *ssl)
2727         {
2728         return(ssl->state);
2729         }
2730
2731 void SSL_set_verify_result(SSL *ssl,long arg)
2732         {
2733         ssl->verify_result=arg;
2734         }
2735
2736 long SSL_get_verify_result(const SSL *ssl)
2737         {
2738         return(ssl->verify_result);
2739         }
2740
2741 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2742                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2743         {
2744         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2745                                 new_func, dup_func, free_func);
2746         }
2747
2748 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2749         {
2750         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2751         }
2752
2753 void *SSL_get_ex_data(const SSL *s,int idx)
2754         {
2755         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2756         }
2757
2758 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2759                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2760         {
2761         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2762                                 new_func, dup_func, free_func);
2763         }
2764
2765 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2766         {
2767         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2768         }
2769
2770 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2771         {
2772         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2773         }
2774
2775 int ssl_ok(SSL *s)
2776         {
2777         return(1);
2778         }
2779
2780 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2781         {
2782         return(ctx->cert_store);
2783         }
2784
2785 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2786         {
2787         if (ctx->cert_store != NULL)
2788                 X509_STORE_free(ctx->cert_store);
2789         ctx->cert_store=store;
2790         }
2791
2792 int SSL_want(const SSL *s)
2793         {
2794         return(s->rwstate);
2795         }
2796
2797 /*!
2798  * \brief Set the callback for generating temporary RSA keys.
2799  * \param ctx the SSL context.
2800  * \param cb the callback
2801  */
2802
2803 #ifndef OPENSSL_NO_RSA
2804 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2805                                                           int is_export,
2806                                                           int keylength))
2807     {
2808     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2809     }
2810
2811 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2812                                                   int is_export,
2813                                                   int keylength))
2814     {
2815     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2816     }
2817 #endif
2818
2819 #ifdef DOXYGEN
2820 /*!
2821  * \brief The RSA temporary key callback function.
2822  * \param ssl the SSL session.
2823  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2824  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2825  * of the required key in bits.
2826  * \return the temporary RSA key.
2827  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2828  */
2829
2830 RSA *cb(SSL *ssl,int is_export,int keylength)
2831     {}
2832 #endif
2833
2834 /*!
2835  * \brief Set the callback for generating temporary DH keys.
2836  * \param ctx the SSL context.
2837  * \param dh the callback
2838  */
2839
2840 #ifndef OPENSSL_NO_DH
2841 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2842                                                         int keylength))
2843         {
2844         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2845         }
2846
2847 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2848                                                 int keylength))
2849         {
2850         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2851         }
2852 #endif
2853
2854 #ifndef OPENSSL_NO_ECDH
2855 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2856                                                                 int keylength))
2857         {
2858         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2859         }
2860
2861 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2862                                                         int keylength))
2863         {
2864         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2865         }
2866 #endif
2867
2868 #ifndef OPENSSL_NO_PSK
2869 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2870         {
2871         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2872                 {
2873                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2874                 return 0;
2875                 }
2876         if (ctx->psk_identity_hint != NULL)
2877                 OPENSSL_free(ctx->psk_identity_hint);
2878         if (identity_hint != NULL)
2879                 {
2880                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2881                 if (ctx->psk_identity_hint == NULL)
2882                         return 0;
2883                 }
2884         else
2885                 ctx->psk_identity_hint = NULL;
2886         return 1;
2887         }
2888
2889 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2890         {
2891         if (s == NULL)
2892                 return 0;
2893
2894         if (s->session == NULL)
2895                 return 1; /* session not created yet, ignored */
2896
2897         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2898                 {
2899                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2900                 return 0;
2901                 }
2902         if (s->session->psk_identity_hint != NULL)
2903                 OPENSSL_free(s->session->psk_identity_hint);
2904         if (identity_hint != NULL)
2905                 {
2906                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2907                 if (s->session->psk_identity_hint == NULL)
2908                         return 0;
2909                 }
2910         else
2911                 s->session->psk_identity_hint = NULL;
2912         return 1;
2913         }
2914
2915 const char *SSL_get_psk_identity_hint(const SSL *s)
2916         {
2917         if (s == NULL || s->session == NULL)
2918                 return NULL;
2919         return(s->session->psk_identity_hint);
2920         }
2921
2922 const char *SSL_get_psk_identity(const SSL *s)
2923         {
2924         if (s == NULL || s->session == NULL)
2925                 return NULL;
2926         return(s->session->psk_identity);
2927         }
2928
2929 void SSL_set_psk_client_callback(SSL *s,
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         s->psk_client_callback = cb;
2935         }
2936
2937 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2938     unsigned int (*cb)(SSL *ssl, const char *hint,
2939                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2940                        unsigned int max_psk_len))
2941         {
2942         ctx->psk_client_callback = cb;
2943         }
2944
2945 void SSL_set_psk_server_callback(SSL *s,
2946     unsigned int (*cb)(SSL *ssl, const char *identity,
2947                        unsigned char *psk, unsigned int max_psk_len))
2948         {
2949         s->psk_server_callback = cb;
2950         }
2951
2952 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2953     unsigned int (*cb)(SSL *ssl, const char *identity,
2954                        unsigned char *psk, unsigned int max_psk_len))
2955         {
2956         ctx->psk_server_callback = cb;
2957         }
2958 #endif
2959
2960 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))
2961         {
2962         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2963         }
2964 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))
2965         {
2966         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2967         }
2968
2969 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2970  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2971  * any. If EVP_MD pointer is passed, initializes ctx with this md
2972  * Returns newly allocated ctx;
2973  */
2974
2975 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
2976 {
2977         ssl_clear_hash_ctx(hash);
2978         *hash = EVP_MD_CTX_create();
2979         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2980         return *hash;
2981 }
2982 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
2983 {
2984
2985         if (*hash) EVP_MD_CTX_destroy(*hash);
2986         *hash=NULL;
2987 }
2988
2989 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2990 #include "../crypto/bio/bss_file.c"
2991 #endif
2992
2993 IMPLEMENT_STACK_OF(SSL_CIPHER)
2994 IMPLEMENT_STACK_OF(SSL_COMP)
2995 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
2996                                     ssl_cipher_id);
2997