RFC4507 (including RFC4507bis) TLS stateless session resumption support
[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 #ifndef OPENSSL_NO_DH
156 #include <openssl/dh.h>
157 #endif
158
159 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
160
161 SSL3_ENC_METHOD ssl3_undef_enc_method={
162         /* evil casts, but these functions are only called if there's a library bug */
163         (int (*)(SSL *,int))ssl_undefined_function,
164         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
165         ssl_undefined_function,
166         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
167         (int (*)(SSL*, int))ssl_undefined_function,
168         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function,
169         0,      /* finish_mac_length */
170         (int (*)(SSL *, EVP_MD_CTX *, unsigned char *))ssl_undefined_function,
171         NULL,   /* client_finished_label */
172         0,      /* client_finished_label_len */
173         NULL,   /* server_finished_label */
174         0,      /* server_finished_label_len */
175         (int (*)(int))ssl_undefined_function
176         };
177
178 int SSL_clear(SSL *s)
179         {
180
181         if (s->method == NULL)
182                 {
183                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
184                 return(0);
185                 }
186
187         if (ssl_clear_bad_session(s))
188                 {
189                 SSL_SESSION_free(s->session);
190                 s->session=NULL;
191                 }
192
193         s->error=0;
194         s->hit=0;
195         s->shutdown=0;
196
197 #if 0 /* Disabled since version 1.10 of this file (early return not
198        * needed because SSL_clear is not called when doing renegotiation) */
199         /* This is set if we are doing dynamic renegotiation so keep
200          * the old cipher.  It is sort of a SSL_clear_lite :-) */
201         if (s->new_session) return(1);
202 #else
203         if (s->new_session)
204                 {
205                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
206                 return 0;
207                 }
208 #endif
209
210         s->type=0;
211
212         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
213
214         s->version=s->method->version;
215         s->client_version=s->version;
216         s->rwstate=SSL_NOTHING;
217         s->rstate=SSL_ST_READ_HEADER;
218 #if 0
219         s->read_ahead=s->ctx->read_ahead;
220 #endif
221
222         if (s->init_buf != NULL)
223                 {
224                 BUF_MEM_free(s->init_buf);
225                 s->init_buf=NULL;
226                 }
227
228         ssl_clear_cipher_ctx(s);
229         ssl_clear_hash_ctx(&s->read_hash);
230         ssl_clear_hash_ctx(&s->write_hash);
231
232         s->first_packet=0;
233
234 #if 1
235         /* Check to see if we were changed into a different method, if
236          * so, revert back if we are not doing session-id reuse. */
237         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
238                 {
239                 s->method->ssl_free(s);
240                 s->method=s->ctx->method;
241                 if (!s->method->ssl_new(s))
242                         return(0);
243                 }
244         else
245 #endif
246                 s->method->ssl_clear(s);
247         return(1);
248         }
249
250 /** Used to change an SSL_CTXs default SSL method type */
251 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
252         {
253         STACK_OF(SSL_CIPHER) *sk;
254
255         ctx->method=meth;
256
257         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
258                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
259         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
260                 {
261                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
262                 return(0);
263                 }
264         return(1);
265         }
266
267 SSL *SSL_new(SSL_CTX *ctx)
268         {
269         SSL *s;
270
271         if (ctx == NULL)
272                 {
273                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
274                 return(NULL);
275                 }
276         if (ctx->method == NULL)
277                 {
278                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
279                 return(NULL);
280                 }
281
282         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
283         if (s == NULL) goto err;
284         memset(s,0,sizeof(SSL));
285
286 #ifndef OPENSSL_NO_KRB5
287         s->kssl_ctx = kssl_ctx_new();
288 #endif  /* OPENSSL_NO_KRB5 */
289
290         s->options=ctx->options;
291         s->mode=ctx->mode;
292         s->max_cert_list=ctx->max_cert_list;
293
294         if (ctx->cert != NULL)
295                 {
296                 /* Earlier library versions used to copy the pointer to
297                  * the CERT, not its contents; only when setting new
298                  * parameters for the per-SSL copy, ssl_cert_new would be
299                  * called (and the direct reference to the per-SSL_CTX
300                  * settings would be lost, but those still were indirectly
301                  * accessed for various purposes, and for that reason they
302                  * used to be known as s->ctx->default_cert).
303                  * Now we don't look at the SSL_CTX's CERT after having
304                  * duplicated it once. */
305
306                 s->cert = ssl_cert_dup(ctx->cert);
307                 if (s->cert == NULL)
308                         goto err;
309                 }
310         else
311                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
312
313         s->read_ahead=ctx->read_ahead;
314         s->msg_callback=ctx->msg_callback;
315         s->msg_callback_arg=ctx->msg_callback_arg;
316         s->verify_mode=ctx->verify_mode;
317 #if 0
318         s->verify_depth=ctx->verify_depth;
319 #endif
320         s->sid_ctx_length=ctx->sid_ctx_length;
321         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
322         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
323         s->verify_callback=ctx->default_verify_callback;
324         s->generate_session_id=ctx->generate_session_id;
325
326         s->param = X509_VERIFY_PARAM_new();
327         if (!s->param)
328                 goto err;
329         X509_VERIFY_PARAM_inherit(s->param, ctx->param);
330 #if 0
331         s->purpose = ctx->purpose;
332         s->trust = ctx->trust;
333 #endif
334         s->quiet_shutdown=ctx->quiet_shutdown;
335         s->max_send_fragment = ctx->max_send_fragment;
336
337         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
338         s->ctx=ctx;
339 #ifndef OPENSSL_NO_TLSEXT
340         s->tlsext_debug_cb = 0;
341         s->tlsext_debug_arg = NULL;
342         s->tlsext_ticket_expected = 0;
343         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
344         s->initial_ctx=ctx;
345 #endif
346
347         s->verify_result=X509_V_OK;
348
349         s->method=ctx->method;
350
351         if (!s->method->ssl_new(s))
352                 goto err;
353
354         s->references=1;
355         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
356
357         SSL_clear(s);
358
359         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
360
361 #ifndef OPENSSL_NO_PSK
362         s->psk_client_callback=ctx->psk_client_callback;
363         s->psk_server_callback=ctx->psk_server_callback;
364 #endif
365
366         return(s);
367 err:
368         if (s != NULL)
369                 {
370                 if (s->cert != NULL)
371                         ssl_cert_free(s->cert);
372                 if (s->ctx != NULL)
373                         SSL_CTX_free(s->ctx); /* decrement reference count */
374                 OPENSSL_free(s);
375                 }
376         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
377         return(NULL);
378         }
379
380 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
381                                    unsigned int sid_ctx_len)
382     {
383     if(sid_ctx_len > sizeof ctx->sid_ctx)
384         {
385         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
386         return 0;
387         }
388     ctx->sid_ctx_length=sid_ctx_len;
389     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
390
391     return 1;
392     }
393
394 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
395                                unsigned int sid_ctx_len)
396     {
397     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
398         {
399         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
400         return 0;
401         }
402     ssl->sid_ctx_length=sid_ctx_len;
403     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
404
405     return 1;
406     }
407
408 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
409         {
410         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
411         ctx->generate_session_id = cb;
412         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
413         return 1;
414         }
415
416 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
417         {
418         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
419         ssl->generate_session_id = cb;
420         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
421         return 1;
422         }
423
424 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
425                                 unsigned int id_len)
426         {
427         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
428          * we can "construct" a session to give us the desired check - ie. to
429          * find if there's a session in the hash table that would conflict with
430          * any new session built out of this id/id_len and the ssl_version in
431          * use by this SSL. */
432         SSL_SESSION r, *p;
433
434         if(id_len > sizeof r.session_id)
435                 return 0;
436
437         r.ssl_version = ssl->version;
438         r.session_id_length = id_len;
439         memcpy(r.session_id, id, id_len);
440         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
441          * callback is calling us to check the uniqueness of a shorter ID, it
442          * must be compared as a padded-out ID because that is what it will be
443          * converted to when the callback has finished choosing it. */
444         if((r.ssl_version == SSL2_VERSION) &&
445                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
446                 {
447                 memset(r.session_id + id_len, 0,
448                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
449                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
450                 }
451
452         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
453         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
454         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
455         return (p != NULL);
456         }
457
458 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
459         {
460         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
461         }
462
463 int SSL_set_purpose(SSL *s, int purpose)
464         {
465         return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
466         }
467
468 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
469         {
470         return X509_VERIFY_PARAM_set_trust(s->param, trust);
471         }
472
473 int SSL_set_trust(SSL *s, int trust)
474         {
475         return X509_VERIFY_PARAM_set_trust(s->param, trust);
476         }
477
478 void SSL_free(SSL *s)
479         {
480         int i;
481
482         if(s == NULL)
483             return;
484
485         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
486 #ifdef REF_PRINT
487         REF_PRINT("SSL",s);
488 #endif
489         if (i > 0) return;
490 #ifdef REF_CHECK
491         if (i < 0)
492                 {
493                 fprintf(stderr,"SSL_free, bad reference count\n");
494                 abort(); /* ok */
495                 }
496 #endif
497
498         if (s->param)
499                 X509_VERIFY_PARAM_free(s->param);
500
501         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
502
503         if (s->bbio != NULL)
504                 {
505                 /* If the buffering BIO is in place, pop it off */
506                 if (s->bbio == s->wbio)
507                         {
508                         s->wbio=BIO_pop(s->wbio);
509                         }
510                 BIO_free(s->bbio);
511                 s->bbio=NULL;
512                 }
513         if (s->rbio != NULL)
514                 BIO_free_all(s->rbio);
515         if ((s->wbio != NULL) && (s->wbio != s->rbio))
516                 BIO_free_all(s->wbio);
517
518         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
519
520         /* add extra stuff */
521         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
522         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
523
524         /* Make the next call work :-) */
525         if (s->session != NULL)
526                 {
527                 ssl_clear_bad_session(s);
528                 SSL_SESSION_free(s->session);
529                 }
530
531         ssl_clear_cipher_ctx(s);
532         ssl_clear_hash_ctx(&s->read_hash);
533         ssl_clear_hash_ctx(&s->write_hash);
534
535         if (s->cert != NULL) ssl_cert_free(s->cert);
536         /* Free up if allocated */
537
538         if (s->ctx) SSL_CTX_free(s->ctx);
539 #ifndef OPENSSL_NO_TLSEXT
540         if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
541 #ifndef OPENSSL_NO_EC
542         if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
543         if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
544 #endif /* OPENSSL_NO_EC */
545 #endif
546
547         if (s->client_CA != NULL)
548                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
549
550         if (s->method != NULL) s->method->ssl_free(s);
551
552 #ifndef OPENSSL_NO_KRB5
553         if (s->kssl_ctx != NULL)
554                 kssl_ctx_free(s->kssl_ctx);
555 #endif  /* OPENSSL_NO_KRB5 */
556
557         OPENSSL_free(s);
558         }
559
560 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
561         {
562         /* If the output buffering BIO is still in place, remove it
563          */
564         if (s->bbio != NULL)
565                 {
566                 if (s->wbio == s->bbio)
567                         {
568                         s->wbio=s->wbio->next_bio;
569                         s->bbio->next_bio=NULL;
570                         }
571                 }
572         if ((s->rbio != NULL) && (s->rbio != rbio))
573                 BIO_free_all(s->rbio);
574         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
575                 BIO_free_all(s->wbio);
576         s->rbio=rbio;
577         s->wbio=wbio;
578         }
579
580 BIO *SSL_get_rbio(const SSL *s)
581         { return(s->rbio); }
582
583 BIO *SSL_get_wbio(const SSL *s)
584         { return(s->wbio); }
585
586 int SSL_get_fd(const SSL *s)
587         {
588         return(SSL_get_rfd(s));
589         }
590
591 int SSL_get_rfd(const SSL *s)
592         {
593         int ret= -1;
594         BIO *b,*r;
595
596         b=SSL_get_rbio(s);
597         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
598         if (r != NULL)
599                 BIO_get_fd(r,&ret);
600         return(ret);
601         }
602
603 int SSL_get_wfd(const SSL *s)
604         {
605         int ret= -1;
606         BIO *b,*r;
607
608         b=SSL_get_wbio(s);
609         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
610         if (r != NULL)
611                 BIO_get_fd(r,&ret);
612         return(ret);
613         }
614
615 #ifndef OPENSSL_NO_SOCK
616 int SSL_set_fd(SSL *s,int fd)
617         {
618         int ret=0;
619         BIO *bio=NULL;
620
621         bio=BIO_new(BIO_s_socket());
622
623         if (bio == NULL)
624                 {
625                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
626                 goto err;
627                 }
628         BIO_set_fd(bio,fd,BIO_NOCLOSE);
629         SSL_set_bio(s,bio,bio);
630         ret=1;
631 err:
632         return(ret);
633         }
634
635 int SSL_set_wfd(SSL *s,int fd)
636         {
637         int ret=0;
638         BIO *bio=NULL;
639
640         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
641                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
642                 {
643                 bio=BIO_new(BIO_s_socket());
644
645                 if (bio == NULL)
646                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
647                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
648                 SSL_set_bio(s,SSL_get_rbio(s),bio);
649                 }
650         else
651                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
652         ret=1;
653 err:
654         return(ret);
655         }
656
657 int SSL_set_rfd(SSL *s,int fd)
658         {
659         int ret=0;
660         BIO *bio=NULL;
661
662         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
663                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
664                 {
665                 bio=BIO_new(BIO_s_socket());
666
667                 if (bio == NULL)
668                         {
669                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
670                         goto err;
671                         }
672                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
673                 SSL_set_bio(s,bio,SSL_get_wbio(s));
674                 }
675         else
676                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
677         ret=1;
678 err:
679         return(ret);
680         }
681 #endif
682
683
684 /* return length of latest Finished message we sent, copy to 'buf' */
685 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
686         {
687         size_t ret = 0;
688         
689         if (s->s3 != NULL)
690                 {
691                 ret = s->s3->tmp.finish_md_len;
692                 if (count > ret)
693                         count = ret;
694                 memcpy(buf, s->s3->tmp.finish_md, count);
695                 }
696         return ret;
697         }
698
699 /* return length of latest Finished message we expected, copy to 'buf' */
700 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
701         {
702         size_t ret = 0;
703         
704         if (s->s3 != NULL)
705                 {
706                 ret = s->s3->tmp.peer_finish_md_len;
707                 if (count > ret)
708                         count = ret;
709                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
710                 }
711         return ret;
712         }
713
714
715 int SSL_get_verify_mode(const SSL *s)
716         {
717         return(s->verify_mode);
718         }
719
720 int SSL_get_verify_depth(const SSL *s)
721         {
722         return X509_VERIFY_PARAM_get_depth(s->param);
723         }
724
725 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
726         {
727         return(s->verify_callback);
728         }
729
730 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
731         {
732         return(ctx->verify_mode);
733         }
734
735 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
736         {
737         return X509_VERIFY_PARAM_get_depth(ctx->param);
738         }
739
740 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
741         {
742         return(ctx->default_verify_callback);
743         }
744
745 void SSL_set_verify(SSL *s,int mode,
746                     int (*callback)(int ok,X509_STORE_CTX *ctx))
747         {
748         s->verify_mode=mode;
749         if (callback != NULL)
750                 s->verify_callback=callback;
751         }
752
753 void SSL_set_verify_depth(SSL *s,int depth)
754         {
755         X509_VERIFY_PARAM_set_depth(s->param, depth);
756         }
757
758 void SSL_set_read_ahead(SSL *s,int yes)
759         {
760         s->read_ahead=yes;
761         }
762
763 int SSL_get_read_ahead(const SSL *s)
764         {
765         return(s->read_ahead);
766         }
767
768 int SSL_pending(const SSL *s)
769         {
770         /* SSL_pending cannot work properly if read-ahead is enabled
771          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
772          * and it is impossible to fix since SSL_pending cannot report
773          * errors that may be observed while scanning the new data.
774          * (Note that SSL_pending() is often used as a boolean value,
775          * so we'd better not return -1.)
776          */
777         return(s->method->ssl_pending(s));
778         }
779
780 X509 *SSL_get_peer_certificate(const SSL *s)
781         {
782         X509 *r;
783         
784         if ((s == NULL) || (s->session == NULL))
785                 r=NULL;
786         else
787                 r=s->session->peer;
788
789         if (r == NULL) return(r);
790
791         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
792
793         return(r);
794         }
795
796 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
797         {
798         STACK_OF(X509) *r;
799         
800         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
801                 r=NULL;
802         else
803                 r=s->session->sess_cert->cert_chain;
804
805         /* If we are a client, cert_chain includes the peer's own
806          * certificate; if we are a server, it does not. */
807         
808         return(r);
809         }
810
811 /* Now in theory, since the calling process own 't' it should be safe to
812  * modify.  We need to be able to read f without being hassled */
813 void SSL_copy_session_id(SSL *t,const SSL *f)
814         {
815         CERT *tmp;
816
817         /* Do we need to to SSL locking? */
818         SSL_set_session(t,SSL_get_session(f));
819
820         /* what if we are setup as SSLv2 but want to talk SSLv3 or
821          * vice-versa */
822         if (t->method != f->method)
823                 {
824                 t->method->ssl_free(t); /* cleanup current */
825                 t->method=f->method;    /* change method */
826                 t->method->ssl_new(t);  /* setup new */
827                 }
828
829         tmp=t->cert;
830         if (f->cert != NULL)
831                 {
832                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
833                 t->cert=f->cert;
834                 }
835         else
836                 t->cert=NULL;
837         if (tmp != NULL) ssl_cert_free(tmp);
838         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
839         }
840
841 /* Fix this so it checks all the valid key/cert options */
842 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
843         {
844         if (    (ctx == NULL) ||
845                 (ctx->cert == NULL) ||
846                 (ctx->cert->key->x509 == NULL))
847                 {
848                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
849                 return(0);
850                 }
851         if      (ctx->cert->key->privatekey == NULL)
852                 {
853                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
854                 return(0);
855                 }
856         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
857         }
858
859 /* Fix this function so that it takes an optional type parameter */
860 int SSL_check_private_key(const SSL *ssl)
861         {
862         if (ssl == NULL)
863                 {
864                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
865                 return(0);
866                 }
867         if (ssl->cert == NULL)
868                 {
869                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
870                 return 0;
871                 }
872         if (ssl->cert->key->x509 == NULL)
873                 {
874                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
875                 return(0);
876                 }
877         if (ssl->cert->key->privatekey == NULL)
878                 {
879                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
880                 return(0);
881                 }
882         return(X509_check_private_key(ssl->cert->key->x509,
883                 ssl->cert->key->privatekey));
884         }
885
886 int SSL_accept(SSL *s)
887         {
888         if (s->handshake_func == 0)
889                 /* Not properly initialized yet */
890                 SSL_set_accept_state(s);
891
892         return(s->method->ssl_accept(s));
893         }
894
895 int SSL_connect(SSL *s)
896         {
897         if (s->handshake_func == 0)
898                 /* Not properly initialized yet */
899                 SSL_set_connect_state(s);
900
901         return(s->method->ssl_connect(s));
902         }
903
904 long SSL_get_default_timeout(const SSL *s)
905         {
906         return(s->method->get_timeout());
907         }
908
909 int SSL_read(SSL *s,void *buf,int num)
910         {
911         if (s->handshake_func == 0)
912                 {
913                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
914                 return -1;
915                 }
916
917         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
918                 {
919                 s->rwstate=SSL_NOTHING;
920                 return(0);
921                 }
922         return(s->method->ssl_read(s,buf,num));
923         }
924
925 int SSL_peek(SSL *s,void *buf,int num)
926         {
927         if (s->handshake_func == 0)
928                 {
929                 SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
930                 return -1;
931                 }
932
933         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
934                 {
935                 return(0);
936                 }
937         return(s->method->ssl_peek(s,buf,num));
938         }
939
940 int SSL_write(SSL *s,const void *buf,int num)
941         {
942         if (s->handshake_func == 0)
943                 {
944                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
945                 return -1;
946                 }
947
948         if (s->shutdown & SSL_SENT_SHUTDOWN)
949                 {
950                 s->rwstate=SSL_NOTHING;
951                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
952                 return(-1);
953                 }
954         return(s->method->ssl_write(s,buf,num));
955         }
956
957 int SSL_shutdown(SSL *s)
958         {
959         /* Note that this function behaves differently from what one might
960          * expect.  Return values are 0 for no success (yet),
961          * 1 for success; but calling it once is usually not enough,
962          * even if blocking I/O is used (see ssl3_shutdown).
963          */
964
965         if (s->handshake_func == 0)
966                 {
967                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
968                 return -1;
969                 }
970
971         if ((s != NULL) && !SSL_in_init(s))
972                 return(s->method->ssl_shutdown(s));
973         else
974                 return(1);
975         }
976
977 int SSL_renegotiate(SSL *s)
978         {
979         if (s->new_session == 0)
980                 {
981                 s->new_session=1;
982                 }
983         return(s->method->ssl_renegotiate(s));
984         }
985
986 int SSL_renegotiate_pending(SSL *s)
987         {
988         /* becomes true when negotiation is requested;
989          * false again once a handshake has finished */
990         return (s->new_session != 0);
991         }
992
993 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
994         {
995         long l;
996
997         switch (cmd)
998                 {
999         case SSL_CTRL_GET_READ_AHEAD:
1000                 return(s->read_ahead);
1001         case SSL_CTRL_SET_READ_AHEAD:
1002                 l=s->read_ahead;
1003                 s->read_ahead=larg;
1004                 return(l);
1005
1006         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1007                 s->msg_callback_arg = parg;
1008                 return 1;
1009
1010         case SSL_CTRL_OPTIONS:
1011                 return(s->options|=larg);
1012         case SSL_CTRL_MODE:
1013                 return(s->mode|=larg);
1014         case SSL_CTRL_GET_MAX_CERT_LIST:
1015                 return(s->max_cert_list);
1016         case SSL_CTRL_SET_MAX_CERT_LIST:
1017                 l=s->max_cert_list;
1018                 s->max_cert_list=larg;
1019                 return(l);
1020         case SSL_CTRL_SET_MTU:
1021                 if (SSL_version(s) == DTLS1_VERSION)
1022                         {
1023                         s->d1->mtu = larg;
1024                         return larg;
1025                         }
1026                 return 0;
1027         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1028                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1029                         return 0;
1030                 s->max_send_fragment = larg;
1031                 return 1;
1032         default:
1033                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
1034                 }
1035         }
1036
1037 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
1038         {
1039         switch(cmd)
1040                 {
1041         case SSL_CTRL_SET_MSG_CALLBACK:
1042                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1043                 return 1;
1044                 
1045         default:
1046                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
1047                 }
1048         }
1049
1050 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
1051         {
1052         return ctx->sessions;
1053         }
1054
1055 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
1056         {
1057         long l;
1058
1059         switch (cmd)
1060                 {
1061         case SSL_CTRL_GET_READ_AHEAD:
1062                 return(ctx->read_ahead);
1063         case SSL_CTRL_SET_READ_AHEAD:
1064                 l=ctx->read_ahead;
1065                 ctx->read_ahead=larg;
1066                 return(l);
1067                 
1068         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
1069                 ctx->msg_callback_arg = parg;
1070                 return 1;
1071
1072         case SSL_CTRL_GET_MAX_CERT_LIST:
1073                 return(ctx->max_cert_list);
1074         case SSL_CTRL_SET_MAX_CERT_LIST:
1075                 l=ctx->max_cert_list;
1076                 ctx->max_cert_list=larg;
1077                 return(l);
1078
1079         case SSL_CTRL_SET_SESS_CACHE_SIZE:
1080                 l=ctx->session_cache_size;
1081                 ctx->session_cache_size=larg;
1082                 return(l);
1083         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1084                 return(ctx->session_cache_size);
1085         case SSL_CTRL_SET_SESS_CACHE_MODE:
1086                 l=ctx->session_cache_mode;
1087                 ctx->session_cache_mode=larg;
1088                 return(l);
1089         case SSL_CTRL_GET_SESS_CACHE_MODE:
1090                 return(ctx->session_cache_mode);
1091
1092         case SSL_CTRL_SESS_NUMBER:
1093                 return(ctx->sessions->num_items);
1094         case SSL_CTRL_SESS_CONNECT:
1095                 return(ctx->stats.sess_connect);
1096         case SSL_CTRL_SESS_CONNECT_GOOD:
1097                 return(ctx->stats.sess_connect_good);
1098         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1099                 return(ctx->stats.sess_connect_renegotiate);
1100         case SSL_CTRL_SESS_ACCEPT:
1101                 return(ctx->stats.sess_accept);
1102         case SSL_CTRL_SESS_ACCEPT_GOOD:
1103                 return(ctx->stats.sess_accept_good);
1104         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1105                 return(ctx->stats.sess_accept_renegotiate);
1106         case SSL_CTRL_SESS_HIT:
1107                 return(ctx->stats.sess_hit);
1108         case SSL_CTRL_SESS_CB_HIT:
1109                 return(ctx->stats.sess_cb_hit);
1110         case SSL_CTRL_SESS_MISSES:
1111                 return(ctx->stats.sess_miss);
1112         case SSL_CTRL_SESS_TIMEOUTS:
1113                 return(ctx->stats.sess_timeout);
1114         case SSL_CTRL_SESS_CACHE_FULL:
1115                 return(ctx->stats.sess_cache_full);
1116         case SSL_CTRL_OPTIONS:
1117                 return(ctx->options|=larg);
1118         case SSL_CTRL_MODE:
1119                 return(ctx->mode|=larg);
1120         case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
1121                 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
1122                         return 0;
1123                 ctx->max_send_fragment = larg;
1124                 return 1;
1125         default:
1126                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1127                 }
1128         }
1129
1130 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
1131         {
1132         switch(cmd)
1133                 {
1134         case SSL_CTRL_SET_MSG_CALLBACK:
1135                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1136                 return 1;
1137
1138         default:
1139                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1140                 }
1141         }
1142
1143 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1144         {
1145         long l;
1146
1147         l=a->id-b->id;
1148         if (l == 0L)
1149                 return(0);
1150         else
1151                 return((l > 0)?1:-1);
1152         }
1153
1154 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1155                         const SSL_CIPHER * const *bp)
1156         {
1157         long l;
1158
1159         l=(*ap)->id-(*bp)->id;
1160         if (l == 0L)
1161                 return(0);
1162         else
1163                 return((l > 0)?1:-1);
1164         }
1165
1166 /** return a STACK of the ciphers available for the SSL and in order of
1167  * preference */
1168 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
1169         {
1170         if (s != NULL)
1171                 {
1172                 if (s->cipher_list != NULL)
1173                         {
1174                         return(s->cipher_list);
1175                         }
1176                 else if ((s->ctx != NULL) &&
1177                         (s->ctx->cipher_list != NULL))
1178                         {
1179                         return(s->ctx->cipher_list);
1180                         }
1181                 }
1182         return(NULL);
1183         }
1184
1185 /** return a STACK of the ciphers available for the SSL and in order of
1186  * algorithm id */
1187 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1188         {
1189         if (s != NULL)
1190                 {
1191                 if (s->cipher_list_by_id != NULL)
1192                         {
1193                         return(s->cipher_list_by_id);
1194                         }
1195                 else if ((s->ctx != NULL) &&
1196                         (s->ctx->cipher_list_by_id != NULL))
1197                         {
1198                         return(s->ctx->cipher_list_by_id);
1199                         }
1200                 }
1201         return(NULL);
1202         }
1203
1204 /** The old interface to get the same thing as SSL_get_ciphers() */
1205 const char *SSL_get_cipher_list(const SSL *s,int n)
1206         {
1207         SSL_CIPHER *c;
1208         STACK_OF(SSL_CIPHER) *sk;
1209
1210         if (s == NULL) return(NULL);
1211         sk=SSL_get_ciphers(s);
1212         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1213                 return(NULL);
1214         c=sk_SSL_CIPHER_value(sk,n);
1215         if (c == NULL) return(NULL);
1216         return(c->name);
1217         }
1218
1219 /** specify the ciphers to be used by default by the SSL_CTX */
1220 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1221         {
1222         STACK_OF(SSL_CIPHER) *sk;
1223         
1224         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1225                 &ctx->cipher_list_by_id,str);
1226         /* ssl_create_cipher_list may return an empty stack if it
1227          * was unable to find a cipher matching the given rule string
1228          * (for example if the rule string specifies a cipher which
1229          * has been disabled). This is not an error as far as
1230          * ssl_create_cipher_list is concerned, and hence
1231          * ctx->cipher_list and ctx->cipher_list_by_id has been
1232          * updated. */
1233         if (sk == NULL)
1234                 return 0;
1235         else if (sk_SSL_CIPHER_num(sk) == 0)
1236                 {
1237                 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1238                 return 0;
1239                 }
1240         return 1;
1241         }
1242
1243 /** specify the ciphers to be used by the SSL */
1244 int SSL_set_cipher_list(SSL *s,const char *str)
1245         {
1246         STACK_OF(SSL_CIPHER) *sk;
1247         
1248         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1249                 &s->cipher_list_by_id,str);
1250         /* see comment in SSL_CTX_set_cipher_list */
1251         if (sk == NULL)
1252                 return 0;
1253         else if (sk_SSL_CIPHER_num(sk) == 0)
1254                 {
1255                 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
1256                 return 0;
1257                 }
1258         return 1;
1259         }
1260
1261 /* works well for SSLv2, not so good for SSLv3 */
1262 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
1263         {
1264         char *p;
1265         const char *cp;
1266         STACK_OF(SSL_CIPHER) *sk;
1267         SSL_CIPHER *c;
1268         int i;
1269
1270         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1271                 (len < 2))
1272                 return(NULL);
1273
1274         p=buf;
1275         sk=s->session->ciphers;
1276         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1277                 {
1278                 /* Decrement for either the ':' or a '\0' */
1279                 len--;
1280                 c=sk_SSL_CIPHER_value(sk,i);
1281                 for (cp=c->name; *cp; )
1282                         {
1283                         if (len-- <= 0)
1284                                 {
1285                                 *p='\0';
1286                                 return(buf);
1287                                 }
1288                         else
1289                                 *(p++)= *(cp++);
1290                         }
1291                 *(p++)=':';
1292                 }
1293         p[-1]='\0';
1294         return(buf);
1295         }
1296
1297 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
1298                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
1299         {
1300         int i,j=0;
1301         SSL_CIPHER *c;
1302         unsigned char *q;
1303 #ifndef OPENSSL_NO_KRB5
1304         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1305 #endif /* OPENSSL_NO_KRB5 */
1306
1307         if (sk == NULL) return(0);
1308         q=p;
1309
1310         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1311                 {
1312                 c=sk_SSL_CIPHER_value(sk,i);
1313 #ifndef OPENSSL_NO_KRB5
1314                 if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
1315                     nokrb5)
1316                     continue;
1317 #endif /* OPENSSL_NO_KRB5 */
1318 #ifndef OPENSSL_NO_PSK
1319                 /* with PSK there must be client callback set */
1320                 if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
1321                     s->psk_client_callback == NULL)
1322                         continue;
1323 #endif /* OPENSSL_NO_PSK */
1324                 j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
1325                 p+=j;
1326                 }
1327         return(p-q);
1328         }
1329
1330 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1331                                                STACK_OF(SSL_CIPHER) **skp)
1332         {
1333         SSL_CIPHER *c;
1334         STACK_OF(SSL_CIPHER) *sk;
1335         int i,n;
1336
1337         n=ssl_put_cipher_by_char(s,NULL,NULL);
1338         if ((num%n) != 0)
1339                 {
1340                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1341                 return(NULL);
1342                 }
1343         if ((skp == NULL) || (*skp == NULL))
1344                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1345         else
1346                 {
1347                 sk= *skp;
1348                 sk_SSL_CIPHER_zero(sk);
1349                 }
1350
1351         for (i=0; i<num; i+=n)
1352                 {
1353                 c=ssl_get_cipher_by_char(s,p);
1354                 p+=n;
1355                 if (c != NULL)
1356                         {
1357                         if (!sk_SSL_CIPHER_push(sk,c))
1358                                 {
1359                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1360                                 goto err;
1361                                 }
1362                         }
1363                 }
1364
1365         if (skp != NULL)
1366                 *skp=sk;
1367         return(sk);
1368 err:
1369         if ((skp == NULL) || (*skp == NULL))
1370                 sk_SSL_CIPHER_free(sk);
1371         return(NULL);
1372         }
1373
1374
1375 #ifndef OPENSSL_TLSEXT
1376 /** return a servername extension value if provided in Client Hello, or NULL.
1377  * So far, only host_name types are defined (RFC 3546).
1378  */
1379
1380 const char *SSL_get_servername(const SSL *s, const int type)
1381         {
1382         if (type != TLSEXT_NAMETYPE_host_name)
1383                 return NULL;
1384
1385         return s->session && !s->tlsext_hostname ?
1386                 s->session->tlsext_hostname :
1387                 s->tlsext_hostname;
1388         }
1389
1390 int SSL_get_servername_type(const SSL *s)
1391         {
1392         if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
1393                 return TLSEXT_NAMETYPE_host_name;
1394         return -1;
1395         }
1396 #endif
1397
1398 unsigned long SSL_SESSION_hash(const SSL_SESSION *a)
1399         {
1400         unsigned long l;
1401
1402         l=(unsigned long)
1403                 ((unsigned int) a->session_id[0]     )|
1404                 ((unsigned int) a->session_id[1]<< 8L)|
1405                 ((unsigned long)a->session_id[2]<<16L)|
1406                 ((unsigned long)a->session_id[3]<<24L);
1407         return(l);
1408         }
1409
1410 /* NB: If this function (or indeed the hash function which uses a sort of
1411  * coarser function than this one) is changed, ensure
1412  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1413  * able to construct an SSL_SESSION that will collide with any existing session
1414  * with a matching session ID. */
1415 int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
1416         {
1417         if (a->ssl_version != b->ssl_version)
1418                 return(1);
1419         if (a->session_id_length != b->session_id_length)
1420                 return(1);
1421         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1422         }
1423
1424 /* These wrapper functions should remain rather than redeclaring
1425  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1426  * variable. The reason is that the functions aren't static, they're exposed via
1427  * ssl.h. */
1428 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1429 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1430
1431 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
1432         {
1433         SSL_CTX *ret=NULL;
1434         
1435         if (meth == NULL)
1436                 {
1437                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1438                 return(NULL);
1439                 }
1440
1441         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1442                 {
1443                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1444                 goto err;
1445                 }
1446         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1447         if (ret == NULL)
1448                 goto err;
1449
1450         memset(ret,0,sizeof(SSL_CTX));
1451
1452         ret->method=meth;
1453
1454         ret->cert_store=NULL;
1455         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1456         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1457         ret->session_cache_head=NULL;
1458         ret->session_cache_tail=NULL;
1459
1460         /* We take the system default */
1461         ret->session_timeout=meth->get_timeout();
1462
1463         ret->new_session_cb=0;
1464         ret->remove_session_cb=0;
1465         ret->get_session_cb=0;
1466         ret->generate_session_id=0;
1467
1468         memset((char *)&ret->stats,0,sizeof(ret->stats));
1469
1470         ret->references=1;
1471         ret->quiet_shutdown=0;
1472
1473 /*      ret->cipher=NULL;*/
1474 /*      ret->s2->challenge=NULL;
1475         ret->master_key=NULL;
1476         ret->key_arg=NULL;
1477         ret->s2->conn_id=NULL; */
1478
1479         ret->info_callback=NULL;
1480
1481         ret->app_verify_callback=0;
1482         ret->app_verify_arg=NULL;
1483
1484         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1485         ret->read_ahead=0;
1486         ret->msg_callback=0;
1487         ret->msg_callback_arg=NULL;
1488         ret->verify_mode=SSL_VERIFY_NONE;
1489 #if 0
1490         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1491 #endif
1492         ret->sid_ctx_length=0;
1493         ret->default_verify_callback=NULL;
1494         if ((ret->cert=ssl_cert_new()) == NULL)
1495                 goto err;
1496
1497         ret->default_passwd_callback=0;
1498         ret->default_passwd_callback_userdata=NULL;
1499         ret->client_cert_cb=0;
1500         ret->app_gen_cookie_cb=0;
1501         ret->app_verify_cookie_cb=0;
1502
1503         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1504                         LHASH_COMP_FN(SSL_SESSION_cmp));
1505         if (ret->sessions == NULL) goto err;
1506         ret->cert_store=X509_STORE_new();
1507         if (ret->cert_store == NULL) goto err;
1508
1509         ssl_create_cipher_list(ret->method,
1510                 &ret->cipher_list,&ret->cipher_list_by_id,
1511                 SSL_DEFAULT_CIPHER_LIST);
1512         if (ret->cipher_list == NULL
1513             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1514                 {
1515                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1516                 goto err2;
1517                 }
1518
1519         ret->param = X509_VERIFY_PARAM_new();
1520         if (!ret->param)
1521                 goto err;
1522
1523         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1524                 {
1525                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1526                 goto err2;
1527                 }
1528         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1529                 {
1530                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1531                 goto err2;
1532                 }
1533         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1534                 {
1535                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1536                 goto err2;
1537                 }
1538
1539         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1540                 goto err;
1541
1542         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1543
1544         ret->extra_certs=NULL;
1545         ret->comp_methods=SSL_COMP_get_compression_methods();
1546
1547         ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
1548
1549 #ifndef OPENSSL_NO_TLSEXT
1550         ret->tlsext_servername_callback = 0;
1551         ret->tlsext_servername_arg = NULL;
1552         /* Setup RFC4507 ticket keys */
1553         if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
1554                 || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
1555                 || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
1556                 ret->options |= SSL_OP_NO_TICKET;
1557
1558 #endif
1559 #ifndef OPENSSL_NO_PSK
1560         ret->psk_identity_hint=NULL;
1561         ret->psk_client_callback=NULL;
1562         ret->psk_server_callback=NULL;
1563 #endif
1564         return(ret);
1565 err:
1566         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1567 err2:
1568         if (ret != NULL) SSL_CTX_free(ret);
1569         return(NULL);
1570         }
1571
1572 #if 0
1573 static void SSL_COMP_free(SSL_COMP *comp)
1574     { OPENSSL_free(comp); }
1575 #endif
1576
1577 void SSL_CTX_free(SSL_CTX *a)
1578         {
1579         int i;
1580
1581         if (a == NULL) return;
1582
1583         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1584 #ifdef REF_PRINT
1585         REF_PRINT("SSL_CTX",a);
1586 #endif
1587         if (i > 0) return;
1588 #ifdef REF_CHECK
1589         if (i < 0)
1590                 {
1591                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1592                 abort(); /* ok */
1593                 }
1594 #endif
1595
1596         if (a->param)
1597                 X509_VERIFY_PARAM_free(a->param);
1598
1599         /*
1600          * Free internal session cache. However: the remove_cb() may reference
1601          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1602          * after the sessions were flushed.
1603          * As the ex_data handling routines might also touch the session cache,
1604          * the most secure solution seems to be: empty (flush) the cache, then
1605          * free ex_data, then finally free the cache.
1606          * (See ticket [openssl.org #212].)
1607          */
1608         if (a->sessions != NULL)
1609                 SSL_CTX_flush_sessions(a,0);
1610
1611         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1612
1613         if (a->sessions != NULL)
1614                 lh_free(a->sessions);
1615
1616         if (a->cert_store != NULL)
1617                 X509_STORE_free(a->cert_store);
1618         if (a->cipher_list != NULL)
1619                 sk_SSL_CIPHER_free(a->cipher_list);
1620         if (a->cipher_list_by_id != NULL)
1621                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1622         if (a->cert != NULL)
1623                 ssl_cert_free(a->cert);
1624         if (a->client_CA != NULL)
1625                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1626         if (a->extra_certs != NULL)
1627                 sk_X509_pop_free(a->extra_certs,X509_free);
1628 #if 0 /* This should never be done, since it removes a global database */
1629         if (a->comp_methods != NULL)
1630                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1631 #else
1632         a->comp_methods = NULL;
1633 #endif
1634
1635 #ifndef OPENSSL_NO_PSK
1636         if (a->psk_identity_hint)
1637                 OPENSSL_free(a->psk_identity_hint);
1638 #endif
1639         OPENSSL_free(a);
1640         }
1641
1642 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1643         {
1644         ctx->default_passwd_callback=cb;
1645         }
1646
1647 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1648         {
1649         ctx->default_passwd_callback_userdata=u;
1650         }
1651
1652 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1653         {
1654         ctx->app_verify_callback=cb;
1655         ctx->app_verify_arg=arg;
1656         }
1657
1658 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1659         {
1660         ctx->verify_mode=mode;
1661         ctx->default_verify_callback=cb;
1662         }
1663
1664 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1665         {
1666         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
1667         }
1668
1669 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1670         {
1671         CERT_PKEY *cpk;
1672         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1673         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1674         int rsa_tmp_export,dh_tmp_export,kl;
1675         unsigned long mask_k,mask_a,emask_k,emask_a;
1676         int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1677 #ifndef OPENSSL_NO_ECDH
1678         int have_ecdh_tmp;
1679 #endif
1680         X509 *x = NULL;
1681         EVP_PKEY *ecc_pkey = NULL;
1682         int signature_nid = 0;
1683
1684         if (c == NULL) return;
1685
1686         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1687
1688 #ifndef OPENSSL_NO_RSA
1689         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1690         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1691                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1692 #else
1693         rsa_tmp=rsa_tmp_export=0;
1694 #endif
1695 #ifndef OPENSSL_NO_DH
1696         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1697         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1698                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1699 #else
1700         dh_tmp=dh_tmp_export=0;
1701 #endif
1702
1703 #ifndef OPENSSL_NO_ECDH
1704         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1705 #endif
1706         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1707         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1708         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1709         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1710         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1711         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1712         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1713         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1714         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1715         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1716         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1717 /* FIX THIS EAY EAY EAY */
1718         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1719         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1720         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1721         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1722         mask_k=0;
1723         mask_a=0;
1724         emask_k=0;
1725         emask_a=0;
1726
1727 #ifdef CIPHER_DEBUG
1728         printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1729                 rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
1730                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1731 #endif
1732
1733         if (rsa_enc || (rsa_tmp && rsa_sign))
1734                 mask_k|=SSL_kRSA;
1735         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1736                 emask_k|=SSL_kRSA;
1737
1738 #if 0
1739         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1740         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1741                 (rsa_enc || rsa_sign || dsa_sign))
1742                 mask_k|=SSL_kEDH;
1743         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1744                 (rsa_enc || rsa_sign || dsa_sign))
1745                 emask_k|=SSL_kEDH;
1746 #endif
1747
1748         if (dh_tmp_export)
1749                 emask_k|=SSL_kEDH;
1750
1751         if (dh_tmp)
1752                 mask_k|=SSL_kEDH;
1753
1754         if (dh_rsa) mask_k|=SSL_kDHr;
1755         if (dh_rsa_export) emask_k|=SSL_kDHr;
1756
1757         if (dh_dsa) mask_k|=SSL_kDHd;
1758         if (dh_dsa_export) emask_k|=SSL_kDHd;
1759
1760         if (rsa_enc || rsa_sign)
1761                 {
1762                 mask_a|=SSL_aRSA;
1763                 emask_a|=SSL_aRSA;
1764                 }
1765
1766         if (dsa_sign)
1767                 {
1768                 mask_a|=SSL_aDSS;
1769                 emask_a|=SSL_aDSS;
1770                 }
1771
1772         mask_a|=SSL_aNULL;
1773         emask_a|=SSL_aNULL;
1774
1775 #ifndef OPENSSL_NO_KRB5
1776         mask_k|=SSL_kKRB5;
1777         mask_a|=SSL_aKRB5;
1778         emask_k|=SSL_kKRB5;
1779         emask_a|=SSL_aKRB5;
1780 #endif
1781
1782         /* An ECC certificate may be usable for ECDH and/or
1783          * ECDSA cipher suites depending on the key usage extension.
1784          */
1785         if (have_ecc_cert)
1786                 {
1787                 /* This call populates extension flags (ex_flags) */
1788                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1789                 X509_check_purpose(x, -1, 0);
1790                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1791                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1792                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1793                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1794                 ecc_pkey = X509_get_pubkey(x);
1795                 ecc_pkey_size = (ecc_pkey != NULL) ?
1796                     EVP_PKEY_bits(ecc_pkey) : 0;
1797                 EVP_PKEY_free(ecc_pkey);
1798                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1799                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1800 #ifndef OPENSSL_NO_ECDH
1801                 if (ecdh_ok)
1802                         {
1803                         const char *sig = OBJ_nid2ln(signature_nid);
1804                         if (sig == NULL)
1805                                 {
1806                                 ERR_clear_error();
1807                                 sig = "unknown";
1808                                 }
1809                                 
1810                         if (strstr(sig, "WithRSA"))
1811                                 {
1812                                 mask_k|=SSL_kECDHr;
1813                                 mask_a|=SSL_aECDH;
1814                                 if (ecc_pkey_size <= 163)
1815                                         {
1816                                         emask_k|=SSL_kECDHr;
1817                                         emask_a|=SSL_aECDH;
1818                                         }
1819                                 }
1820
1821                         if (signature_nid == NID_ecdsa_with_SHA1)
1822                                 {
1823                                 mask_k|=SSL_kECDHe;
1824                                 mask_a|=SSL_aECDH;
1825                                 if (ecc_pkey_size <= 163)
1826                                         {
1827                                         emask_k|=SSL_kECDHe;
1828                                         emask_a|=SSL_aECDH;
1829                                         }
1830                                 }
1831                         }
1832 #endif
1833 #ifndef OPENSSL_NO_ECDSA
1834                 if (ecdsa_ok)
1835                         {
1836                         mask_a|=SSL_aECDSA;
1837                         emask_a|=SSL_aECDSA;
1838                         }
1839 #endif
1840                 }
1841
1842 #ifndef OPENSSL_NO_ECDH
1843         if (have_ecdh_tmp)
1844                 {
1845                 mask_k|=SSL_kEECDH;
1846                 emask_k|=SSL_kEECDH;
1847                 }
1848 #endif
1849
1850 #ifndef OPENSSL_NO_PSK
1851         mask_k |= SSL_kPSK;
1852         mask_a |= SSL_aPSK;
1853         emask_k |= SSL_kPSK;
1854         emask_a |= SSL_aPSK;
1855 #endif
1856
1857         c->mask_k=mask_k;
1858         c->mask_a=mask_a;
1859         c->export_mask_k=emask_k;
1860         c->export_mask_a=emask_a;
1861         c->valid=1;
1862         }
1863
1864 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1865 #define ku_reject(x, usage) \
1866         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1867
1868 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1869         {
1870         unsigned long alg_k, alg_a;
1871         EVP_PKEY *pkey = NULL;
1872         int keysize = 0;
1873         int signature_nid = 0;
1874
1875         alg_k = cs->algorithm_mkey;
1876         alg_a = cs->algorithm_auth;
1877
1878         if (SSL_C_IS_EXPORT(cs))
1879                 {
1880                 /* ECDH key length in export ciphers must be <= 163 bits */
1881                 pkey = X509_get_pubkey(x);
1882                 if (pkey == NULL) return 0;
1883                 keysize = EVP_PKEY_bits(pkey);
1884                 EVP_PKEY_free(pkey);
1885                 if (keysize > 163) return 0;
1886                 }
1887
1888         /* This call populates the ex_flags field correctly */
1889         X509_check_purpose(x, -1, 0);
1890         if ((x->sig_alg) && (x->sig_alg->algorithm))
1891                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1892         if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
1893                 {
1894                 /* key usage, if present, must allow key agreement */
1895                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1896                         {
1897                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
1898                         return 0;
1899                         }
1900                 if (alg_k & SSL_kECDHe)
1901                         {
1902                         /* signature alg must be ECDSA */
1903                         if (signature_nid != NID_ecdsa_with_SHA1)
1904                                 {
1905                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
1906                                 return 0;
1907                                 }
1908                         }
1909                 if (alg_k & SSL_kECDHr)
1910                         {
1911                         /* signature alg must be RSA */
1912
1913                         const char *sig = OBJ_nid2ln(signature_nid);
1914                         if (sig == NULL)
1915                                 {
1916                                 ERR_clear_error();
1917                                 sig = "unknown";
1918                                 }
1919                         if (strstr(sig, "WithRSA") == NULL)
1920                                 {
1921                                 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
1922                                 return 0;
1923                                 }
1924                         }
1925                 }
1926         if (alg_a & SSL_aECDSA)
1927                 {
1928                 /* key usage, if present, must allow signing */
1929                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1930                         {
1931                         SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
1932                         return 0;
1933                         }
1934                 }
1935
1936         return 1;  /* all checks are ok */
1937         }
1938
1939 /* THIS NEEDS CLEANING UP */
1940 X509 *ssl_get_server_send_cert(SSL *s)
1941         {
1942         unsigned long alg_k,alg_a,mask_k,mask_a;
1943         CERT *c;
1944         int i,is_export;
1945
1946         c=s->cert;
1947         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1948         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1949         if (is_export)
1950                 {
1951                 mask_k = c->export_mask_k;
1952                 mask_a = c->export_mask_a;
1953                 }
1954         else
1955                 {
1956                 mask_k = c->mask_k;
1957                 mask_a = c->mask_a;
1958                 }
1959         
1960         alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1961         alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1962
1963         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1964                 {
1965                 /* we don't need to look at SSL_kEECDH
1966                  * since no certificate is needed for
1967                  * anon ECDH and for authenticated
1968                  * EECDH, the check for the auth
1969                  * algorithm will set i correctly
1970                  * NOTE: For ECDH-RSA, we need an ECC
1971                  * not an RSA cert but for EECDH-RSA
1972                  * we need an RSA cert. Placing the
1973                  * checks for SSL_kECDH before RSA
1974                  * checks ensures the correct cert is chosen.
1975                  */
1976                 i=SSL_PKEY_ECC;
1977                 }
1978         else if (alg_a & SSL_aECDSA)
1979                 {
1980                 i=SSL_PKEY_ECC;
1981                 }
1982         else if (alg_k & SSL_kDHr)
1983                 i=SSL_PKEY_DH_RSA;
1984         else if (alg_k & SSL_kDHd)
1985                 i=SSL_PKEY_DH_DSA;
1986         else if (alg_a & SSL_aDSS)
1987                 i=SSL_PKEY_DSA_SIGN;
1988         else if (alg_a & SSL_aRSA)
1989                 {
1990                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1991                         i=SSL_PKEY_RSA_SIGN;
1992                 else
1993                         i=SSL_PKEY_RSA_ENC;
1994                 }
1995         else if (alg_a & SSL_aKRB5)
1996                 {
1997                 /* VRS something else here? */
1998                 return(NULL);
1999                 }
2000         else /* if (alg_a & SSL_aNULL) */
2001                 {
2002                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
2003                 return(NULL);
2004                 }
2005         if (c->pkeys[i].x509 == NULL) return(NULL);
2006
2007         return(c->pkeys[i].x509);
2008         }
2009
2010 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
2011         {
2012         unsigned long alg_a;
2013         CERT *c;
2014
2015         alg_a = cipher->algorithm_auth;
2016         c=s->cert;
2017
2018         if ((alg_a & SSL_aDSS) &&
2019                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
2020                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
2021         else if (alg_a & SSL_aRSA)
2022                 {
2023                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
2024                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
2025                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
2026                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
2027                 else
2028                         return(NULL);
2029                 }
2030         else if ((alg_a & SSL_aECDSA) &&
2031                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
2032                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
2033         else /* if (alg_a & SSL_aNULL) */
2034                 {
2035                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
2036                 return(NULL);
2037                 }
2038         }
2039
2040 void ssl_update_cache(SSL *s,int mode)
2041         {
2042         int i;
2043
2044         /* If the session_id_length is 0, we are not supposed to cache it,
2045          * and it would be rather hard to do anyway :-) */
2046         if (s->session->session_id_length == 0) return;
2047
2048         i=s->session_ctx->session_cache_mode;
2049         if ((i & mode) && (!s->hit)
2050                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
2051                     || SSL_CTX_add_session(s->session_ctx,s->session))
2052                 && (s->session_ctx->new_session_cb != NULL))
2053                 {
2054                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
2055                 if (!s->session_ctx->new_session_cb(s,s->session))
2056                         SSL_SESSION_free(s->session);
2057                 }
2058
2059         /* auto flush every 255 connections */
2060         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
2061                 ((i & mode) == mode))
2062                 {
2063                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
2064                         ?s->session_ctx->stats.sess_connect_good
2065                         :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
2066                         {
2067                         SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
2068                         }
2069                 }
2070         }
2071
2072 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
2073         {
2074         return(s->method);
2075         }
2076
2077 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
2078         {
2079         int conn= -1;
2080         int ret=1;
2081
2082         if (s->method != meth)
2083                 {
2084                 if (s->handshake_func != NULL)
2085                         conn=(s->handshake_func == s->method->ssl_connect);
2086
2087                 if (s->method->version == meth->version)
2088                         s->method=meth;
2089                 else
2090                         {
2091                         s->method->ssl_free(s);
2092                         s->method=meth;
2093                         ret=s->method->ssl_new(s);
2094                         }
2095
2096                 if (conn == 1)
2097                         s->handshake_func=meth->ssl_connect;
2098                 else if (conn == 0)
2099                         s->handshake_func=meth->ssl_accept;
2100                 }
2101         return(ret);
2102         }
2103
2104 int SSL_get_error(const SSL *s,int i)
2105         {
2106         int reason;
2107         unsigned long l;
2108         BIO *bio;
2109
2110         if (i > 0) return(SSL_ERROR_NONE);
2111
2112         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
2113          * etc, where we do encode the error */
2114         if ((l=ERR_peek_error()) != 0)
2115                 {
2116                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
2117                         return(SSL_ERROR_SYSCALL);
2118                 else
2119                         return(SSL_ERROR_SSL);
2120                 }
2121
2122         if ((i < 0) && SSL_want_read(s))
2123                 {
2124                 bio=SSL_get_rbio(s);
2125                 if (BIO_should_read(bio))
2126                         return(SSL_ERROR_WANT_READ);
2127                 else if (BIO_should_write(bio))
2128                         /* This one doesn't make too much sense ... We never try
2129                          * to write to the rbio, and an application program where
2130                          * rbio and wbio are separate couldn't even know what it
2131                          * should wait for.
2132                          * However if we ever set s->rwstate incorrectly
2133                          * (so that we have SSL_want_read(s) instead of
2134                          * SSL_want_write(s)) and rbio and wbio *are* the same,
2135                          * this test works around that bug; so it might be safer
2136                          * to keep it. */
2137                         return(SSL_ERROR_WANT_WRITE);
2138                 else if (BIO_should_io_special(bio))
2139                         {
2140                         reason=BIO_get_retry_reason(bio);
2141                         if (reason == BIO_RR_CONNECT)
2142                                 return(SSL_ERROR_WANT_CONNECT);
2143                         else if (reason == BIO_RR_ACCEPT)
2144                                 return(SSL_ERROR_WANT_ACCEPT);
2145                         else
2146                                 return(SSL_ERROR_SYSCALL); /* unknown */
2147                         }
2148                 }
2149
2150         if ((i < 0) && SSL_want_write(s))
2151                 {
2152                 bio=SSL_get_wbio(s);
2153                 if (BIO_should_write(bio))
2154                         return(SSL_ERROR_WANT_WRITE);
2155                 else if (BIO_should_read(bio))
2156                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
2157                         return(SSL_ERROR_WANT_READ);
2158                 else if (BIO_should_io_special(bio))
2159                         {
2160                         reason=BIO_get_retry_reason(bio);
2161                         if (reason == BIO_RR_CONNECT)
2162                                 return(SSL_ERROR_WANT_CONNECT);
2163                         else if (reason == BIO_RR_ACCEPT)
2164                                 return(SSL_ERROR_WANT_ACCEPT);
2165                         else
2166                                 return(SSL_ERROR_SYSCALL);
2167                         }
2168                 }
2169         if ((i < 0) && SSL_want_x509_lookup(s))
2170                 {
2171                 return(SSL_ERROR_WANT_X509_LOOKUP);
2172                 }
2173
2174         if (i == 0)
2175                 {
2176                 if (s->version == SSL2_VERSION)
2177                         {
2178                         /* assume it is the socket being closed */
2179                         return(SSL_ERROR_ZERO_RETURN);
2180                         }
2181                 else
2182                         {
2183                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
2184                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
2185                                 return(SSL_ERROR_ZERO_RETURN);
2186                         }
2187                 }
2188         return(SSL_ERROR_SYSCALL);
2189         }
2190
2191 int SSL_do_handshake(SSL *s)
2192         {
2193         int ret=1;
2194
2195         if (s->handshake_func == NULL)
2196                 {
2197                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
2198                 return(-1);
2199                 }
2200
2201         s->method->ssl_renegotiate_check(s);
2202
2203         if (SSL_in_init(s) || SSL_in_before(s))
2204                 {
2205                 ret=s->handshake_func(s);
2206                 }
2207         return(ret);
2208         }
2209
2210 /* For the next 2 functions, SSL_clear() sets shutdown and so
2211  * one of these calls will reset it */
2212 void SSL_set_accept_state(SSL *s)
2213         {
2214         s->server=1;
2215         s->shutdown=0;
2216         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
2217         s->handshake_func=s->method->ssl_accept;
2218         /* clear the current cipher */
2219         ssl_clear_cipher_ctx(s);
2220         ssl_clear_hash_ctx(&s->read_hash);
2221         ssl_clear_hash_ctx(&s->write_hash);
2222         }
2223
2224 void SSL_set_connect_state(SSL *s)
2225         {
2226         s->server=0;
2227         s->shutdown=0;
2228         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2229         s->handshake_func=s->method->ssl_connect;
2230         /* clear the current cipher */
2231         ssl_clear_cipher_ctx(s);
2232         ssl_clear_hash_ctx(&s->read_hash);
2233         ssl_clear_hash_ctx(&s->write_hash);
2234         }
2235
2236 int ssl_undefined_function(SSL *s)
2237         {
2238         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2239         return(0);
2240         }
2241
2242 int ssl_undefined_void_function(void)
2243         {
2244         SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2245         return(0);
2246         }
2247
2248 int ssl_undefined_const_function(const SSL *s)
2249         {
2250         SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2251         return(0);
2252         }
2253
2254 SSL_METHOD *ssl_bad_method(int ver)
2255         {
2256         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2257         return(NULL);
2258         }
2259
2260 const char *SSL_get_version(const SSL *s)
2261         {
2262         if (s->version == TLS1_VERSION)
2263                 return("TLSv1");
2264         else if (s->version == SSL3_VERSION)
2265                 return("SSLv3");
2266         else if (s->version == SSL2_VERSION)
2267                 return("SSLv2");
2268         else
2269                 return("unknown");
2270         }
2271
2272 SSL *SSL_dup(SSL *s)
2273         {
2274         STACK_OF(X509_NAME) *sk;
2275         X509_NAME *xn;
2276         SSL *ret;
2277         int i;
2278         
2279         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2280             return(NULL);
2281
2282         ret->version = s->version;
2283         ret->type = s->type;
2284         ret->method = s->method;
2285
2286         if (s->session != NULL)
2287                 {
2288                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2289                 SSL_copy_session_id(ret,s);
2290                 }
2291         else
2292                 {
2293                 /* No session has been established yet, so we have to expect
2294                  * that s->cert or ret->cert will be changed later --
2295                  * they should not both point to the same object,
2296                  * and thus we can't use SSL_copy_session_id. */
2297
2298                 ret->method->ssl_free(ret);
2299                 ret->method = s->method;
2300                 ret->method->ssl_new(ret);
2301
2302                 if (s->cert != NULL)
2303                         {
2304                         if (ret->cert != NULL)
2305                                 {
2306                                 ssl_cert_free(ret->cert);
2307                                 }
2308                         ret->cert = ssl_cert_dup(s->cert);
2309                         if (ret->cert == NULL)
2310                                 goto err;
2311                         }
2312                                 
2313                 SSL_set_session_id_context(ret,
2314                         s->sid_ctx, s->sid_ctx_length);
2315                 }
2316
2317         ret->options=s->options;
2318         ret->mode=s->mode;
2319         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2320         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2321         ret->msg_callback = s->msg_callback;
2322         ret->msg_callback_arg = s->msg_callback_arg;
2323         SSL_set_verify(ret,SSL_get_verify_mode(s),
2324                 SSL_get_verify_callback(s));
2325         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2326         ret->generate_session_id = s->generate_session_id;
2327
2328         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2329         
2330         ret->debug=s->debug;
2331
2332         /* copy app data, a little dangerous perhaps */
2333         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2334                 goto err;
2335
2336         /* setup rbio, and wbio */
2337         if (s->rbio != NULL)
2338                 {
2339                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2340                         goto err;
2341                 }
2342         if (s->wbio != NULL)
2343                 {
2344                 if (s->wbio != s->rbio)
2345                         {
2346                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2347                                 goto err;
2348                         }
2349                 else
2350                         ret->wbio=ret->rbio;
2351                 }
2352         ret->rwstate = s->rwstate;
2353         ret->in_handshake = s->in_handshake;
2354         ret->handshake_func = s->handshake_func;
2355         ret->server = s->server;
2356         ret->new_session = s->new_session;
2357         ret->quiet_shutdown = s->quiet_shutdown;
2358         ret->shutdown=s->shutdown;
2359         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2360         ret->rstate=s->rstate;
2361         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2362         ret->hit=s->hit;
2363
2364         X509_VERIFY_PARAM_inherit(ret->param, s->param);
2365
2366         /* dup the cipher_list and cipher_list_by_id stacks */
2367         if (s->cipher_list != NULL)
2368                 {
2369                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2370                         goto err;
2371                 }
2372         if (s->cipher_list_by_id != NULL)
2373                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2374                         == NULL)
2375                         goto err;
2376
2377         /* Dup the client_CA list */
2378         if (s->client_CA != NULL)
2379                 {
2380                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2381                 ret->client_CA=sk;
2382                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2383                         {
2384                         xn=sk_X509_NAME_value(sk,i);
2385                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2386                                 {
2387                                 X509_NAME_free(xn);
2388                                 goto err;
2389                                 }
2390                         }
2391                 }
2392
2393         if (0)
2394                 {
2395 err:
2396                 if (ret != NULL) SSL_free(ret);
2397                 ret=NULL;
2398                 }
2399         return(ret);
2400         }
2401
2402 void ssl_clear_cipher_ctx(SSL *s)
2403         {
2404         if (s->enc_read_ctx != NULL)
2405                 {
2406                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2407                 OPENSSL_free(s->enc_read_ctx);
2408                 s->enc_read_ctx=NULL;
2409                 }
2410         if (s->enc_write_ctx != NULL)
2411                 {
2412                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2413                 OPENSSL_free(s->enc_write_ctx);
2414                 s->enc_write_ctx=NULL;
2415                 }
2416 #ifndef OPENSSL_NO_COMP
2417         if (s->expand != NULL)
2418                 {
2419                 COMP_CTX_free(s->expand);
2420                 s->expand=NULL;
2421                 }
2422         if (s->compress != NULL)
2423                 {
2424                 COMP_CTX_free(s->compress);
2425                 s->compress=NULL;
2426                 }
2427 #endif
2428         }
2429
2430 /* Fix this function so that it takes an optional type parameter */
2431 X509 *SSL_get_certificate(const SSL *s)
2432         {
2433         if (s->cert != NULL)
2434                 return(s->cert->key->x509);
2435         else
2436                 return(NULL);
2437         }
2438
2439 /* Fix this function so that it takes an optional type parameter */
2440 EVP_PKEY *SSL_get_privatekey(SSL *s)
2441         {
2442         if (s->cert != NULL)
2443                 return(s->cert->key->privatekey);
2444         else
2445                 return(NULL);
2446         }
2447
2448 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
2449         {
2450         if ((s->session != NULL) && (s->session->cipher != NULL))
2451                 return(s->session->cipher);
2452         return(NULL);
2453         }
2454 #ifdef OPENSSL_NO_COMP
2455 const void *SSL_get_current_compression(SSL *s)
2456         {
2457         return NULL;
2458         }
2459 const void *SSL_get_current_expansion(SSL *s)
2460         {
2461         return NULL;
2462         }
2463 #else
2464
2465 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2466         {
2467         if (s->compress != NULL)
2468                 return(s->compress->meth);
2469         return(NULL);
2470         }
2471
2472 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2473         {
2474         if (s->expand != NULL)
2475                 return(s->expand->meth);
2476         return(NULL);
2477         }
2478 #endif
2479
2480 int ssl_init_wbio_buffer(SSL *s,int push)
2481         {
2482         BIO *bbio;
2483
2484         if (s->bbio == NULL)
2485                 {
2486                 bbio=BIO_new(BIO_f_buffer());
2487                 if (bbio == NULL) return(0);
2488                 s->bbio=bbio;
2489                 }
2490         else
2491                 {
2492                 bbio=s->bbio;
2493                 if (s->bbio == s->wbio)
2494                         s->wbio=BIO_pop(s->wbio);
2495                 }
2496         (void)BIO_reset(bbio);
2497 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2498         if (!BIO_set_read_buffer_size(bbio,1))
2499                 {
2500                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2501                 return(0);
2502                 }
2503         if (push)
2504                 {
2505                 if (s->wbio != bbio)
2506                         s->wbio=BIO_push(bbio,s->wbio);
2507                 }
2508         else
2509                 {
2510                 if (s->wbio == bbio)
2511                         s->wbio=BIO_pop(bbio);
2512                 }
2513         return(1);
2514         }
2515
2516 void ssl_free_wbio_buffer(SSL *s)
2517         {
2518         if (s->bbio == NULL) return;
2519
2520         if (s->bbio == s->wbio)
2521                 {
2522                 /* remove buffering */
2523                 s->wbio=BIO_pop(s->wbio);
2524 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2525                 assert(s->wbio != NULL);
2526 #endif
2527         }
2528         BIO_free(s->bbio);
2529         s->bbio=NULL;
2530         }
2531         
2532 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2533         {
2534         ctx->quiet_shutdown=mode;
2535         }
2536
2537 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
2538         {
2539         return(ctx->quiet_shutdown);
2540         }
2541
2542 void SSL_set_quiet_shutdown(SSL *s,int mode)
2543         {
2544         s->quiet_shutdown=mode;
2545         }
2546
2547 int SSL_get_quiet_shutdown(const SSL *s)
2548         {
2549         return(s->quiet_shutdown);
2550         }
2551
2552 void SSL_set_shutdown(SSL *s,int mode)
2553         {
2554         s->shutdown=mode;
2555         }
2556
2557 int SSL_get_shutdown(const SSL *s)
2558         {
2559         return(s->shutdown);
2560         }
2561
2562 int SSL_version(const SSL *s)
2563         {
2564         return(s->version);
2565         }
2566
2567 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
2568         {
2569         return(ssl->ctx);
2570         }
2571
2572 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
2573         {
2574         if (ssl->ctx == ctx)
2575                 return ssl->ctx;
2576         if (ctx == NULL)
2577                 ctx = ssl->initial_ctx;
2578         if (ssl->cert != NULL)
2579                 ssl_cert_free(ssl->cert);
2580         ssl->cert = ssl_cert_dup(ctx->cert);
2581         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
2582         if (ssl->ctx != NULL)
2583                 SSL_CTX_free(ssl->ctx); /* decrement reference count */
2584         ssl->ctx = ctx;
2585         return(ssl->ctx);
2586         }
2587
2588 #ifndef OPENSSL_NO_STDIO
2589 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2590         {
2591         return(X509_STORE_set_default_paths(ctx->cert_store));
2592         }
2593
2594 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2595                 const char *CApath)
2596         {
2597         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2598         }
2599 #endif
2600
2601 void SSL_set_info_callback(SSL *ssl,
2602         void (*cb)(const SSL *ssl,int type,int val))
2603         {
2604         ssl->info_callback=cb;
2605         }
2606
2607 /* One compiler (Diab DCC) doesn't like argument names in returned
2608    function pointer.  */
2609 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
2610         {
2611         return ssl->info_callback;
2612         }
2613
2614 int SSL_state(const SSL *ssl)
2615         {
2616         return(ssl->state);
2617         }
2618
2619 void SSL_set_verify_result(SSL *ssl,long arg)
2620         {
2621         ssl->verify_result=arg;
2622         }
2623
2624 long SSL_get_verify_result(const SSL *ssl)
2625         {
2626         return(ssl->verify_result);
2627         }
2628
2629 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2630                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2631         {
2632         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2633                                 new_func, dup_func, free_func);
2634         }
2635
2636 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2637         {
2638         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2639         }
2640
2641 void *SSL_get_ex_data(const SSL *s,int idx)
2642         {
2643         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2644         }
2645
2646 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2647                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2648         {
2649         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2650                                 new_func, dup_func, free_func);
2651         }
2652
2653 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2654         {
2655         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2656         }
2657
2658 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
2659         {
2660         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2661         }
2662
2663 int ssl_ok(SSL *s)
2664         {
2665         return(1);
2666         }
2667
2668 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
2669         {
2670         return(ctx->cert_store);
2671         }
2672
2673 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2674         {
2675         if (ctx->cert_store != NULL)
2676                 X509_STORE_free(ctx->cert_store);
2677         ctx->cert_store=store;
2678         }
2679
2680 int SSL_want(const SSL *s)
2681         {
2682         return(s->rwstate);
2683         }
2684
2685 /*!
2686  * \brief Set the callback for generating temporary RSA keys.
2687  * \param ctx the SSL context.
2688  * \param cb the callback
2689  */
2690
2691 #ifndef OPENSSL_NO_RSA
2692 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2693                                                           int is_export,
2694                                                           int keylength))
2695     {
2696     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2697     }
2698
2699 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2700                                                   int is_export,
2701                                                   int keylength))
2702     {
2703     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
2704     }
2705 #endif
2706
2707 #ifdef DOXYGEN
2708 /*!
2709  * \brief The RSA temporary key callback function.
2710  * \param ssl the SSL session.
2711  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2712  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2713  * of the required key in bits.
2714  * \return the temporary RSA key.
2715  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2716  */
2717
2718 RSA *cb(SSL *ssl,int is_export,int keylength)
2719     {}
2720 #endif
2721
2722 /*!
2723  * \brief Set the callback for generating temporary DH keys.
2724  * \param ctx the SSL context.
2725  * \param dh the callback
2726  */
2727
2728 #ifndef OPENSSL_NO_DH
2729 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2730                                                         int keylength))
2731         {
2732         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2733         }
2734
2735 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2736                                                 int keylength))
2737         {
2738         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
2739         }
2740 #endif
2741
2742 #ifndef OPENSSL_NO_ECDH
2743 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2744                                                                 int keylength))
2745         {
2746         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2747         }
2748
2749 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2750                                                         int keylength))
2751         {
2752         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
2753         }
2754 #endif
2755
2756 #ifndef OPENSSL_NO_PSK
2757 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
2758         {
2759         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2760                 {
2761                 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2762                 return 0;
2763                 }
2764         if (ctx->psk_identity_hint != NULL)
2765                 OPENSSL_free(ctx->psk_identity_hint);
2766         if (identity_hint != NULL)
2767                 {
2768                 ctx->psk_identity_hint = BUF_strdup(identity_hint);
2769                 if (ctx->psk_identity_hint == NULL)
2770                         return 0;
2771                 }
2772         else
2773                 ctx->psk_identity_hint = NULL;
2774         return 1;
2775         }
2776
2777 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
2778         {
2779         if (s == NULL)
2780                 return 0;
2781
2782         if (s->session == NULL)
2783                 return 1; /* session not created yet, ignored */
2784
2785         if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
2786                 {
2787                 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
2788                 return 0;
2789                 }
2790         if (s->session->psk_identity_hint != NULL)
2791                 OPENSSL_free(s->session->psk_identity_hint);
2792         if (identity_hint != NULL)
2793                 {
2794                 s->session->psk_identity_hint = BUF_strdup(identity_hint);
2795                 if (s->session->psk_identity_hint == NULL)
2796                         return 0;
2797                 }
2798         else
2799                 s->session->psk_identity_hint = NULL;
2800         return 1;
2801         }
2802
2803 const char *SSL_get_psk_identity_hint(const SSL *s)
2804         {
2805         if (s == NULL || s->session == NULL)
2806                 return NULL;
2807         return(s->session->psk_identity_hint);
2808         }
2809
2810 const char *SSL_get_psk_identity(const SSL *s)
2811         {
2812         if (s == NULL || s->session == NULL)
2813                 return NULL;
2814         return(s->session->psk_identity);
2815         }
2816
2817 void SSL_set_psk_client_callback(SSL *s,
2818     unsigned int (*cb)(SSL *ssl, const char *hint,
2819                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2820                        unsigned int max_psk_len))
2821         {
2822         s->psk_client_callback = cb;
2823         }
2824
2825 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
2826     unsigned int (*cb)(SSL *ssl, const char *hint,
2827                        char *identity, unsigned int max_identity_len, unsigned char *psk,
2828                        unsigned int max_psk_len))
2829         {
2830         ctx->psk_client_callback = cb;
2831         }
2832
2833 void SSL_set_psk_server_callback(SSL *s,
2834     unsigned int (*cb)(SSL *ssl, const char *identity,
2835                        unsigned char *psk, unsigned int max_psk_len))
2836         {
2837         s->psk_server_callback = cb;
2838         }
2839
2840 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
2841     unsigned int (*cb)(SSL *ssl, const char *identity,
2842                        unsigned char *psk, unsigned int max_psk_len))
2843         {
2844         ctx->psk_server_callback = cb;
2845         }
2846 #endif
2847
2848 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))
2849         {
2850         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2851         }
2852 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))
2853         {
2854         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
2855         }
2856
2857 /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
2858  * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
2859  * any. If EVP_MD pointer is passed, initializes ctx with this md
2860  * Returns newly allocated ctx;
2861  */ 
2862
2863 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
2864 {
2865         ssl_clear_hash_ctx(hash);
2866         *hash = EVP_MD_CTX_create();
2867         if (md) EVP_DigestInit_ex(*hash,md,NULL);
2868         return *hash;
2869 }
2870 void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
2871 {
2872
2873         if (*hash) EVP_MD_CTX_destroy(*hash);
2874         *hash=NULL;
2875 }
2876
2877 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2878 #include "../crypto/bio/bss_file.c"
2879 #endif
2880
2881 IMPLEMENT_STACK_OF(SSL_CIPHER)
2882 IMPLEMENT_STACK_OF(SSL_COMP)