bf7d7ba561100d1ed9bbb8d83d9a674401206457
[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) 1998-2001 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 #ifdef REF_CHECK
120 #  include <assert.h>
121 #endif
122 #include <stdio.h>
123 #include "ssl_locl.h"
124 #include "kssl_lcl.h"
125 #include <openssl/objects.h>
126 #include <openssl/lhash.h>
127 #include <openssl/x509v3.h>
128 #include "cryptlib.h"
129
130 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
131
132 OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
133         /* evil casts, but these functions are only called if there's a library bug */
134         (int (*)(SSL *,int))ssl_undefined_function,
135         (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
136         ssl_undefined_function,
137         (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
138         (int (*)(SSL*, int))ssl_undefined_function,
139         (int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function
140         };
141
142 int SSL_clear(SSL *s)
143         {
144
145         if (s->method == NULL)
146                 {
147                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
148                 return(0);
149                 }
150
151         if (ssl_clear_bad_session(s))
152                 {
153                 SSL_SESSION_free(s->session);
154                 s->session=NULL;
155                 }
156
157         s->error=0;
158         s->hit=0;
159         s->shutdown=0;
160
161 #if 0 /* Disabled since version 1.10 of this file (early return not
162        * needed because SSL_clear is not called when doing renegotiation) */
163         /* This is set if we are doing dynamic renegotiation so keep
164          * the old cipher.  It is sort of a SSL_clear_lite :-) */
165         if (s->new_session) return(1);
166 #else
167         if (s->new_session)
168                 {
169                 SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
170                 return 0;
171                 }
172 #endif
173
174         s->type=0;
175
176         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
177
178         s->version=s->method->version;
179         s->client_version=s->version;
180         s->rwstate=SSL_NOTHING;
181         s->rstate=SSL_ST_READ_HEADER;
182 #if 0
183         s->read_ahead=s->ctx->read_ahead;
184 #endif
185
186         if (s->init_buf != NULL)
187                 {
188                 BUF_MEM_free(s->init_buf);
189                 s->init_buf=NULL;
190                 }
191
192         ssl_clear_cipher_ctx(s);
193
194         s->first_packet=0;
195
196 #if 1
197         /* Check to see if we were changed into a different method, if
198          * so, revert back if we are not doing session-id reuse. */
199         if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
200                 {
201                 s->method->ssl_free(s);
202                 s->method=s->ctx->method;
203                 if (!s->method->ssl_new(s))
204                         return(0);
205                 }
206         else
207 #endif
208                 s->method->ssl_clear(s);
209         return(1);
210         }
211
212 /** Used to change an SSL_CTXs default SSL method type */
213 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
214         {
215         STACK_OF(SSL_CIPHER) *sk;
216
217         ctx->method=meth;
218
219         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
220                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
221         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
222                 {
223                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
224                 return(0);
225                 }
226         return(1);
227         }
228
229 SSL *SSL_new(SSL_CTX *ctx)
230         {
231         SSL *s;
232
233         if (ctx == NULL)
234                 {
235                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
236                 return(NULL);
237                 }
238         if (ctx->method == NULL)
239                 {
240                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
241                 return(NULL);
242                 }
243
244         s=(SSL *)OPENSSL_malloc(sizeof(SSL));
245         if (s == NULL) goto err;
246         memset(s,0,sizeof(SSL));
247
248 #ifndef OPENSSL_NO_KRB5
249         s->kssl_ctx = kssl_ctx_new();
250 #endif  /* OPENSSL_NO_KRB5 */
251
252         s->options=ctx->options;
253         s->mode=ctx->mode;
254         s->max_cert_list=ctx->max_cert_list;
255
256         if (ctx->cert != NULL)
257                 {
258                 /* Earlier library versions used to copy the pointer to
259                  * the CERT, not its contents; only when setting new
260                  * parameters for the per-SSL copy, ssl_cert_new would be
261                  * called (and the direct reference to the per-SSL_CTX
262                  * settings would be lost, but those still were indirectly
263                  * accessed for various purposes, and for that reason they
264                  * used to be known as s->ctx->default_cert).
265                  * Now we don't look at the SSL_CTX's CERT after having
266                  * duplicated it once. */
267
268                 s->cert = ssl_cert_dup(ctx->cert);
269                 if (s->cert == NULL)
270                         goto err;
271                 }
272         else
273                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
274
275         s->read_ahead=ctx->read_ahead;
276         s->msg_callback=ctx->msg_callback;
277         s->msg_callback_arg=ctx->msg_callback_arg;
278         s->verify_mode=ctx->verify_mode;
279         s->verify_depth=ctx->verify_depth;
280         s->sid_ctx_length=ctx->sid_ctx_length;
281         OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
282         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
283         s->verify_callback=ctx->default_verify_callback;
284         s->generate_session_id=ctx->generate_session_id;
285         s->purpose = ctx->purpose;
286         s->trust = ctx->trust;
287         s->quiet_shutdown=ctx->quiet_shutdown;
288
289         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
290         s->ctx=ctx;
291
292         s->verify_result=X509_V_OK;
293
294         s->method=ctx->method;
295
296         if (!s->method->ssl_new(s))
297                 goto err;
298
299         s->references=1;
300         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
301
302         SSL_clear(s);
303
304         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
305
306         return(s);
307 err:
308         if (s != NULL)
309                 {
310                 if (s->cert != NULL)
311                         ssl_cert_free(s->cert);
312                 if (s->ctx != NULL)
313                         SSL_CTX_free(s->ctx); /* decrement reference count */
314                 OPENSSL_free(s);
315                 }
316         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
317         return(NULL);
318         }
319
320 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
321                                    unsigned int sid_ctx_len)
322     {
323     if(sid_ctx_len > sizeof ctx->sid_ctx)
324         {
325         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
326         return 0;
327         }
328     ctx->sid_ctx_length=sid_ctx_len;
329     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
330
331     return 1;
332     }
333
334 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
335                                unsigned int sid_ctx_len)
336     {
337     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
338         {
339         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
340         return 0;
341         }
342     ssl->sid_ctx_length=sid_ctx_len;
343     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
344
345     return 1;
346     }
347
348 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
349         {
350         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
351         ctx->generate_session_id = cb;
352         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
353         return 1;
354         }
355
356 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
357         {
358         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
359         ssl->generate_session_id = cb;
360         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
361         return 1;
362         }
363
364 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
365                                 unsigned int id_len)
366         {
367         /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
368          * we can "construct" a session to give us the desired check - ie. to
369          * find if there's a session in the hash table that would conflict with
370          * any new session built out of this id/id_len and the ssl_version in
371          * use by this SSL. */
372         SSL_SESSION r, *p;
373
374         if(id_len > sizeof r.session_id)
375                 return 0;
376
377         r.ssl_version = ssl->version;
378         r.session_id_length = id_len;
379         memcpy(r.session_id, id, id_len);
380         /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
381          * callback is calling us to check the uniqueness of a shorter ID, it
382          * must be compared as a padded-out ID because that is what it will be
383          * converted to when the callback has finished choosing it. */
384         if((r.ssl_version == SSL2_VERSION) &&
385                         (id_len < SSL2_SSL_SESSION_ID_LENGTH))
386                 {
387                 memset(r.session_id + id_len, 0,
388                         SSL2_SSL_SESSION_ID_LENGTH - id_len);
389                 r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
390                 }
391
392         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
393         p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
394         CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
395         return (p != NULL);
396         }
397
398 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
399         {
400         return X509_PURPOSE_set(&s->purpose, purpose);
401         }
402
403 int SSL_set_purpose(SSL *s, int purpose)
404         {
405         return X509_PURPOSE_set(&s->purpose, purpose);
406         }
407
408 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
409         {
410         return X509_TRUST_set(&s->trust, trust);
411         }
412
413 int SSL_set_trust(SSL *s, int trust)
414         {
415         return X509_TRUST_set(&s->trust, trust);
416         }
417
418 void SSL_free(SSL *s)
419         {
420         int i;
421
422         if(s == NULL)
423             return;
424
425         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
426 #ifdef REF_PRINT
427         REF_PRINT("SSL",s);
428 #endif
429         if (i > 0) return;
430 #ifdef REF_CHECK
431         if (i < 0)
432                 {
433                 fprintf(stderr,"SSL_free, bad reference count\n");
434                 abort(); /* ok */
435                 }
436 #endif
437
438         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
439
440         if (s->bbio != NULL)
441                 {
442                 /* If the buffering BIO is in place, pop it off */
443                 if (s->bbio == s->wbio)
444                         {
445                         s->wbio=BIO_pop(s->wbio);
446                         }
447                 BIO_free(s->bbio);
448                 s->bbio=NULL;
449                 }
450         if (s->rbio != NULL)
451                 BIO_free_all(s->rbio);
452         if ((s->wbio != NULL) && (s->wbio != s->rbio))
453                 BIO_free_all(s->wbio);
454
455         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
456
457         /* add extra stuff */
458         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
459         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
460
461         /* Make the next call work :-) */
462         if (s->session != NULL)
463                 {
464                 ssl_clear_bad_session(s);
465                 SSL_SESSION_free(s->session);
466                 }
467
468         ssl_clear_cipher_ctx(s);
469
470         if (s->cert != NULL) ssl_cert_free(s->cert);
471         /* Free up if allocated */
472
473         if (s->ctx) SSL_CTX_free(s->ctx);
474
475         if (s->client_CA != NULL)
476                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
477
478         if (s->method != NULL) s->method->ssl_free(s);
479
480 #ifndef OPENSSL_NO_KRB5
481         if (s->kssl_ctx != NULL)
482                 kssl_ctx_free(s->kssl_ctx);
483 #endif  /* OPENSSL_NO_KRB5 */
484
485         OPENSSL_free(s);
486         }
487
488 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
489         {
490         /* If the output buffering BIO is still in place, remove it
491          */
492         if (s->bbio != NULL)
493                 {
494                 if (s->wbio == s->bbio)
495                         {
496                         s->wbio=s->wbio->next_bio;
497                         s->bbio->next_bio=NULL;
498                         }
499                 }
500         if ((s->rbio != NULL) && (s->rbio != rbio))
501                 BIO_free_all(s->rbio);
502         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
503                 BIO_free_all(s->wbio);
504         s->rbio=rbio;
505         s->wbio=wbio;
506         }
507
508 BIO *SSL_get_rbio(SSL *s)
509         { return(s->rbio); }
510
511 BIO *SSL_get_wbio(SSL *s)
512         { return(s->wbio); }
513
514 int SSL_get_fd(SSL *s)
515         {
516         return(SSL_get_rfd(s));
517         }
518
519 int SSL_get_rfd(SSL *s)
520         {
521         int ret= -1;
522         BIO *b,*r;
523
524         b=SSL_get_rbio(s);
525         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
526         if (r != NULL)
527                 BIO_get_fd(r,&ret);
528         return(ret);
529         }
530
531 int SSL_get_wfd(SSL *s)
532         {
533         int ret= -1;
534         BIO *b,*r;
535
536         b=SSL_get_wbio(s);
537         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
538         if (r != NULL)
539                 BIO_get_fd(r,&ret);
540         return(ret);
541         }
542
543 #ifndef OPENSSL_NO_SOCK
544 int SSL_set_fd(SSL *s,int fd)
545         {
546         int ret=0;
547         BIO *bio=NULL;
548
549         bio=BIO_new(BIO_s_socket());
550
551         if (bio == NULL)
552                 {
553                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
554                 goto err;
555                 }
556         BIO_set_fd(bio,fd,BIO_NOCLOSE);
557         SSL_set_bio(s,bio,bio);
558         ret=1;
559 err:
560         return(ret);
561         }
562
563 int SSL_set_wfd(SSL *s,int fd)
564         {
565         int ret=0;
566         BIO *bio=NULL;
567
568         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
569                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
570                 {
571                 bio=BIO_new(BIO_s_socket());
572
573                 if (bio == NULL)
574                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
575                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
576                 SSL_set_bio(s,SSL_get_rbio(s),bio);
577                 }
578         else
579                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
580         ret=1;
581 err:
582         return(ret);
583         }
584
585 int SSL_set_rfd(SSL *s,int fd)
586         {
587         int ret=0;
588         BIO *bio=NULL;
589
590         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
591                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
592                 {
593                 bio=BIO_new(BIO_s_socket());
594
595                 if (bio == NULL)
596                         {
597                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
598                         goto err;
599                         }
600                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
601                 SSL_set_bio(s,bio,SSL_get_wbio(s));
602                 }
603         else
604                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
605         ret=1;
606 err:
607         return(ret);
608         }
609 #endif
610
611
612 /* return length of latest Finished message we sent, copy to 'buf' */
613 size_t SSL_get_finished(SSL *s, void *buf, size_t count)
614         {
615         size_t ret = 0;
616         
617         if (s->s3 != NULL)
618                 {
619                 ret = s->s3->tmp.finish_md_len;
620                 if (count > ret)
621                         count = ret;
622                 memcpy(buf, s->s3->tmp.finish_md, count);
623                 }
624         return ret;
625         }
626
627 /* return length of latest Finished message we expected, copy to 'buf' */
628 size_t SSL_get_peer_finished(SSL *s, void *buf, size_t count)
629         {
630         size_t ret = 0;
631         
632         if (s->s3 != NULL)
633                 {
634                 ret = s->s3->tmp.peer_finish_md_len;
635                 if (count > ret)
636                         count = ret;
637                 memcpy(buf, s->s3->tmp.peer_finish_md, count);
638                 }
639         return ret;
640         }
641
642
643 int SSL_get_verify_mode(SSL *s)
644         {
645         return(s->verify_mode);
646         }
647
648 int SSL_get_verify_depth(SSL *s)
649         {
650         return(s->verify_depth);
651         }
652
653 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
654         {
655         return(s->verify_callback);
656         }
657
658 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
659         {
660         return(ctx->verify_mode);
661         }
662
663 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
664         {
665         return(ctx->verify_depth);
666         }
667
668 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
669         {
670         return(ctx->default_verify_callback);
671         }
672
673 void SSL_set_verify(SSL *s,int mode,
674                     int (*callback)(int ok,X509_STORE_CTX *ctx))
675         {
676         s->verify_mode=mode;
677         if (callback != NULL)
678                 s->verify_callback=callback;
679         }
680
681 void SSL_set_verify_depth(SSL *s,int depth)
682         {
683         s->verify_depth=depth;
684         }
685
686 void SSL_set_read_ahead(SSL *s,int yes)
687         {
688         s->read_ahead=yes;
689         }
690
691 int SSL_get_read_ahead(SSL *s)
692         {
693         return(s->read_ahead);
694         }
695
696 int SSL_pending(SSL *s)
697         {
698         /* SSL_pending cannot work properly if read-ahead is enabled
699          * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
700          * and it is impossible to fix since SSL_pending cannot report
701          * errors that may be observed while scanning the new data.
702          * (Note that SSL_pending() is often used as a boolean value,
703          * so we'd better not return -1.)
704          */
705         return(s->method->ssl_pending(s));
706         }
707
708 X509 *SSL_get_peer_certificate(SSL *s)
709         {
710         X509 *r;
711         
712         if ((s == NULL) || (s->session == NULL))
713                 r=NULL;
714         else
715                 r=s->session->peer;
716
717         if (r == NULL) return(r);
718
719         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
720
721         return(r);
722         }
723
724 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
725         {
726         STACK_OF(X509) *r;
727         
728         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
729                 r=NULL;
730         else
731                 r=s->session->sess_cert->cert_chain;
732
733         /* If we are a client, cert_chain includes the peer's own
734          * certificate; if we are a server, it does not. */
735         
736         return(r);
737         }
738
739 /* Now in theory, since the calling process own 't' it should be safe to
740  * modify.  We need to be able to read f without being hassled */
741 void SSL_copy_session_id(SSL *t,SSL *f)
742         {
743         CERT *tmp;
744
745         /* Do we need to to SSL locking? */
746         SSL_set_session(t,SSL_get_session(f));
747
748         /* what if we are setup as SSLv2 but want to talk SSLv3 or
749          * vice-versa */
750         if (t->method != f->method)
751                 {
752                 t->method->ssl_free(t); /* cleanup current */
753                 t->method=f->method;    /* change method */
754                 t->method->ssl_new(t);  /* setup new */
755                 }
756
757         tmp=t->cert;
758         if (f->cert != NULL)
759                 {
760                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
761                 t->cert=f->cert;
762                 }
763         else
764                 t->cert=NULL;
765         if (tmp != NULL) ssl_cert_free(tmp);
766         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
767         }
768
769 /* Fix this so it checks all the valid key/cert options */
770 int SSL_CTX_check_private_key(SSL_CTX *ctx)
771         {
772         if (    (ctx == NULL) ||
773                 (ctx->cert == NULL) ||
774                 (ctx->cert->key->x509 == NULL))
775                 {
776                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
777                 return(0);
778                 }
779         if      (ctx->cert->key->privatekey == NULL)
780                 {
781                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
782                 return(0);
783                 }
784         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
785         }
786
787 /* Fix this function so that it takes an optional type parameter */
788 int SSL_check_private_key(SSL *ssl)
789         {
790         if (ssl == NULL)
791                 {
792                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
793                 return(0);
794                 }
795         if (ssl->cert == NULL)
796                 {
797                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
798                 return 0;
799                 }
800         if (ssl->cert->key->x509 == NULL)
801                 {
802                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
803                 return(0);
804                 }
805         if (ssl->cert->key->privatekey == NULL)
806                 {
807                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
808                 return(0);
809                 }
810         return(X509_check_private_key(ssl->cert->key->x509,
811                 ssl->cert->key->privatekey));
812         }
813
814 int SSL_accept(SSL *s)
815         {
816         if (s->handshake_func == 0)
817                 /* Not properly initialized yet */
818                 SSL_set_accept_state(s);
819
820         return(s->method->ssl_accept(s));
821         }
822
823 int SSL_connect(SSL *s)
824         {
825         if (s->handshake_func == 0)
826                 /* Not properly initialized yet */
827                 SSL_set_connect_state(s);
828
829         return(s->method->ssl_connect(s));
830         }
831
832 long SSL_get_default_timeout(SSL *s)
833         {
834         return(s->method->get_timeout());
835         }
836
837 int SSL_read(SSL *s,void *buf,int num)
838         {
839         if (s->handshake_func == 0)
840                 {
841                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
842                 return -1;
843                 }
844
845         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
846                 {
847                 s->rwstate=SSL_NOTHING;
848                 return(0);
849                 }
850         return(s->method->ssl_read(s,buf,num));
851         }
852
853 int SSL_peek(SSL *s,void *buf,int num)
854         {
855         if (s->handshake_func == 0)
856                 {
857                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
858                 return -1;
859                 }
860
861         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
862                 {
863                 return(0);
864                 }
865         return(s->method->ssl_peek(s,buf,num));
866         }
867
868 int SSL_write(SSL *s,const void *buf,int num)
869         {
870         if (s->handshake_func == 0)
871                 {
872                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
873                 return -1;
874                 }
875
876         if (s->shutdown & SSL_SENT_SHUTDOWN)
877                 {
878                 s->rwstate=SSL_NOTHING;
879                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
880                 return(-1);
881                 }
882         return(s->method->ssl_write(s,buf,num));
883         }
884
885 int SSL_shutdown(SSL *s)
886         {
887         /* Note that this function behaves differently from what one might
888          * expect.  Return values are 0 for no success (yet),
889          * 1 for success; but calling it once is usually not enough,
890          * even if blocking I/O is used (see ssl3_shutdown).
891          */
892
893         if (s->handshake_func == 0)
894                 {
895                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
896                 return -1;
897                 }
898
899         if ((s != NULL) && !SSL_in_init(s))
900                 return(s->method->ssl_shutdown(s));
901         else
902                 return(1);
903         }
904
905 int SSL_renegotiate(SSL *s)
906         {
907         if (s->new_session == 0)
908                 {
909                 s->new_session=1;
910                 }
911         return(s->method->ssl_renegotiate(s));
912         }
913
914 int SSL_renegotiate_pending(SSL *s)
915         {
916         /* becomes true when negotiation is requested;
917          * false again once a handshake has finished */
918         return (s->new_session != 0);
919         }
920
921 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
922         {
923         long l;
924
925         switch (cmd)
926                 {
927         case SSL_CTRL_GET_READ_AHEAD:
928                 return(s->read_ahead);
929         case SSL_CTRL_SET_READ_AHEAD:
930                 l=s->read_ahead;
931                 s->read_ahead=larg;
932                 return(l);
933
934         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
935                 s->msg_callback_arg = parg;
936                 return 1;
937
938         case SSL_CTRL_OPTIONS:
939                 return(s->options|=larg);
940         case SSL_CTRL_MODE:
941                 return(s->mode|=larg);
942         case SSL_CTRL_GET_MAX_CERT_LIST:
943                 return(s->max_cert_list);
944         case SSL_CTRL_SET_MAX_CERT_LIST:
945                 l=s->max_cert_list;
946                 s->max_cert_list=larg;
947                 return(l);
948         default:
949                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
950                 }
951         }
952
953 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)())
954         {
955         switch(cmd)
956                 {
957         case SSL_CTRL_SET_MSG_CALLBACK:
958                 s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
959                 return 1;
960                 
961         default:
962                 return(s->method->ssl_callback_ctrl(s,cmd,fp));
963                 }
964         }
965
966 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
967         {
968         return ctx->sessions;
969         }
970
971 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
972         {
973         long l;
974
975         switch (cmd)
976                 {
977         case SSL_CTRL_GET_READ_AHEAD:
978                 return(ctx->read_ahead);
979         case SSL_CTRL_SET_READ_AHEAD:
980                 l=ctx->read_ahead;
981                 ctx->read_ahead=larg;
982                 return(l);
983                 
984         case SSL_CTRL_SET_MSG_CALLBACK_ARG:
985                 ctx->msg_callback_arg = parg;
986                 return 1;
987
988         case SSL_CTRL_GET_MAX_CERT_LIST:
989                 return(ctx->max_cert_list);
990         case SSL_CTRL_SET_MAX_CERT_LIST:
991                 l=ctx->max_cert_list;
992                 ctx->max_cert_list=larg;
993                 return(l);
994
995         case SSL_CTRL_SET_SESS_CACHE_SIZE:
996                 l=ctx->session_cache_size;
997                 ctx->session_cache_size=larg;
998                 return(l);
999         case SSL_CTRL_GET_SESS_CACHE_SIZE:
1000                 return(ctx->session_cache_size);
1001         case SSL_CTRL_SET_SESS_CACHE_MODE:
1002                 l=ctx->session_cache_mode;
1003                 ctx->session_cache_mode=larg;
1004                 return(l);
1005         case SSL_CTRL_GET_SESS_CACHE_MODE:
1006                 return(ctx->session_cache_mode);
1007
1008         case SSL_CTRL_SESS_NUMBER:
1009                 return(ctx->sessions->num_items);
1010         case SSL_CTRL_SESS_CONNECT:
1011                 return(ctx->stats.sess_connect);
1012         case SSL_CTRL_SESS_CONNECT_GOOD:
1013                 return(ctx->stats.sess_connect_good);
1014         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
1015                 return(ctx->stats.sess_connect_renegotiate);
1016         case SSL_CTRL_SESS_ACCEPT:
1017                 return(ctx->stats.sess_accept);
1018         case SSL_CTRL_SESS_ACCEPT_GOOD:
1019                 return(ctx->stats.sess_accept_good);
1020         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
1021                 return(ctx->stats.sess_accept_renegotiate);
1022         case SSL_CTRL_SESS_HIT:
1023                 return(ctx->stats.sess_hit);
1024         case SSL_CTRL_SESS_CB_HIT:
1025                 return(ctx->stats.sess_cb_hit);
1026         case SSL_CTRL_SESS_MISSES:
1027                 return(ctx->stats.sess_miss);
1028         case SSL_CTRL_SESS_TIMEOUTS:
1029                 return(ctx->stats.sess_timeout);
1030         case SSL_CTRL_SESS_CACHE_FULL:
1031                 return(ctx->stats.sess_cache_full);
1032         case SSL_CTRL_OPTIONS:
1033                 return(ctx->options|=larg);
1034         case SSL_CTRL_MODE:
1035                 return(ctx->mode|=larg);
1036         default:
1037                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
1038                 }
1039         }
1040
1041 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)())
1042         {
1043         switch(cmd)
1044                 {
1045         case SSL_CTRL_SET_MSG_CALLBACK:
1046                 ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
1047                 return 1;
1048
1049         default:
1050                 return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
1051                 }
1052         }
1053
1054 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
1055         {
1056         long l;
1057
1058         l=a->id-b->id;
1059         if (l == 0L)
1060                 return(0);
1061         else
1062                 return((l > 0)?1:-1);
1063         }
1064
1065 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
1066                         const SSL_CIPHER * const *bp)
1067         {
1068         long l;
1069
1070         l=(*ap)->id-(*bp)->id;
1071         if (l == 0L)
1072                 return(0);
1073         else
1074                 return((l > 0)?1:-1);
1075         }
1076
1077 /** return a STACK of the ciphers available for the SSL and in order of
1078  * preference */
1079 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
1080         {
1081         if (s != NULL)
1082                 {
1083                 if (s->cipher_list != NULL)
1084                         {
1085                         return(s->cipher_list);
1086                         }
1087                 else if ((s->ctx != NULL) &&
1088                         (s->ctx->cipher_list != NULL))
1089                         {
1090                         return(s->ctx->cipher_list);
1091                         }
1092                 }
1093         return(NULL);
1094         }
1095
1096 /** return a STACK of the ciphers available for the SSL and in order of
1097  * algorithm id */
1098 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
1099         {
1100         if (s != NULL)
1101                 {
1102                 if (s->cipher_list_by_id != NULL)
1103                         {
1104                         return(s->cipher_list_by_id);
1105                         }
1106                 else if ((s->ctx != NULL) &&
1107                         (s->ctx->cipher_list_by_id != NULL))
1108                         {
1109                         return(s->ctx->cipher_list_by_id);
1110                         }
1111                 }
1112         return(NULL);
1113         }
1114
1115 /** The old interface to get the same thing as SSL_get_ciphers() */
1116 const char *SSL_get_cipher_list(SSL *s,int n)
1117         {
1118         SSL_CIPHER *c;
1119         STACK_OF(SSL_CIPHER) *sk;
1120
1121         if (s == NULL) return(NULL);
1122         sk=SSL_get_ciphers(s);
1123         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
1124                 return(NULL);
1125         c=sk_SSL_CIPHER_value(sk,n);
1126         if (c == NULL) return(NULL);
1127         return(c->name);
1128         }
1129
1130 /** specify the ciphers to be used by default by the SSL_CTX */
1131 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
1132         {
1133         STACK_OF(SSL_CIPHER) *sk;
1134         
1135         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
1136                 &ctx->cipher_list_by_id,str);
1137 /* XXXX */
1138         return((sk == NULL)?0:1);
1139         }
1140
1141 /** specify the ciphers to be used by the SSL */
1142 int SSL_set_cipher_list(SSL *s,const char *str)
1143         {
1144         STACK_OF(SSL_CIPHER) *sk;
1145         
1146         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
1147                 &s->cipher_list_by_id,str);
1148 /* XXXX */
1149         return((sk == NULL)?0:1);
1150         }
1151
1152 /* works well for SSLv2, not so good for SSLv3 */
1153 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
1154         {
1155         char *p;
1156         const char *cp;
1157         STACK_OF(SSL_CIPHER) *sk;
1158         SSL_CIPHER *c;
1159         int i;
1160
1161         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
1162                 (len < 2))
1163                 return(NULL);
1164
1165         p=buf;
1166         sk=s->session->ciphers;
1167         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1168                 {
1169                 /* Decrement for either the ':' or a '\0' */
1170                 len--;
1171                 c=sk_SSL_CIPHER_value(sk,i);
1172                 for (cp=c->name; *cp; )
1173                         {
1174                         if (len-- == 0)
1175                                 {
1176                                 *p='\0';
1177                                 return(buf);
1178                                 }
1179                         else
1180                                 *(p++)= *(cp++);
1181                         }
1182                 *(p++)=':';
1183                 }
1184         p[-1]='\0';
1185         return(buf);
1186         }
1187
1188 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
1189         {
1190         int i,j=0;
1191         SSL_CIPHER *c;
1192         unsigned char *q;
1193 #ifndef OPENSSL_NO_KRB5
1194         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
1195 #endif /* OPENSSL_NO_KRB5 */
1196
1197         if (sk == NULL) return(0);
1198         q=p;
1199
1200         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1201                 {
1202                 c=sk_SSL_CIPHER_value(sk,i);
1203 #ifndef OPENSSL_NO_KRB5
1204                 if ((c->algorithms & SSL_KRB5) && nokrb5)
1205                     continue;
1206 #endif /* OPENSSL_NO_KRB5 */                    
1207                 j=ssl_put_cipher_by_char(s,c,p);
1208                 p+=j;
1209                 }
1210         return(p-q);
1211         }
1212
1213 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
1214                                                STACK_OF(SSL_CIPHER) **skp)
1215         {
1216         SSL_CIPHER *c;
1217         STACK_OF(SSL_CIPHER) *sk;
1218         int i,n;
1219
1220         n=ssl_put_cipher_by_char(s,NULL,NULL);
1221         if ((num%n) != 0)
1222                 {
1223                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
1224                 return(NULL);
1225                 }
1226         if ((skp == NULL) || (*skp == NULL))
1227                 sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
1228         else
1229                 {
1230                 sk= *skp;
1231                 sk_SSL_CIPHER_zero(sk);
1232                 }
1233
1234         for (i=0; i<num; i+=n)
1235                 {
1236                 c=ssl_get_cipher_by_char(s,p);
1237                 p+=n;
1238                 if (c != NULL)
1239                         {
1240                         if (!sk_SSL_CIPHER_push(sk,c))
1241                                 {
1242                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1243                                 goto err;
1244                                 }
1245                         }
1246                 }
1247
1248         if (skp != NULL)
1249                 *skp=sk;
1250         return(sk);
1251 err:
1252         if ((skp == NULL) || (*skp == NULL))
1253                 sk_SSL_CIPHER_free(sk);
1254         return(NULL);
1255         }
1256
1257 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
1258         {
1259         unsigned long l;
1260
1261         l=(unsigned long)
1262                 ((unsigned int) a->session_id[0]     )|
1263                 ((unsigned int) a->session_id[1]<< 8L)|
1264                 ((unsigned long)a->session_id[2]<<16L)|
1265                 ((unsigned long)a->session_id[3]<<24L);
1266         return(l);
1267         }
1268
1269 /* NB: If this function (or indeed the hash function which uses a sort of
1270  * coarser function than this one) is changed, ensure
1271  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
1272  * able to construct an SSL_SESSION that will collide with any existing session
1273  * with a matching session ID. */
1274 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
1275         {
1276         if (a->ssl_version != b->ssl_version)
1277                 return(1);
1278         if (a->session_id_length != b->session_id_length)
1279                 return(1);
1280         return(memcmp(a->session_id,b->session_id,a->session_id_length));
1281         }
1282
1283 /* These wrapper functions should remain rather than redeclaring
1284  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
1285  * variable. The reason is that the functions aren't static, they're exposed via
1286  * ssl.h. */
1287 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
1288 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
1289
1290 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
1291         {
1292         SSL_CTX *ret=NULL;
1293         
1294         if (meth == NULL)
1295                 {
1296                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
1297                 return(NULL);
1298                 }
1299
1300         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
1301                 {
1302                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
1303                 goto err;
1304                 }
1305         ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
1306         if (ret == NULL)
1307                 goto err;
1308
1309         memset(ret,0,sizeof(SSL_CTX));
1310
1311         ret->method=meth;
1312
1313         ret->cert_store=NULL;
1314         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1315         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1316         ret->session_cache_head=NULL;
1317         ret->session_cache_tail=NULL;
1318
1319         /* We take the system default */
1320         ret->session_timeout=meth->get_timeout();
1321
1322         ret->new_session_cb=0;
1323         ret->remove_session_cb=0;
1324         ret->get_session_cb=0;
1325         ret->generate_session_id=0;
1326
1327         memset((char *)&ret->stats,0,sizeof(ret->stats));
1328
1329         ret->references=1;
1330         ret->quiet_shutdown=0;
1331
1332 /*      ret->cipher=NULL;*/
1333 /*      ret->s2->challenge=NULL;
1334         ret->master_key=NULL;
1335         ret->key_arg=NULL;
1336         ret->s2->conn_id=NULL; */
1337
1338         ret->info_callback=NULL;
1339
1340         ret->app_verify_callback=0;
1341         ret->app_verify_arg=NULL;
1342
1343         ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
1344         ret->read_ahead=0;
1345         ret->msg_callback=0;
1346         ret->msg_callback_arg=NULL;
1347         ret->verify_mode=SSL_VERIFY_NONE;
1348         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1349         ret->sid_ctx_length=0;
1350         ret->default_verify_callback=NULL;
1351         if ((ret->cert=ssl_cert_new()) == NULL)
1352                 goto err;
1353
1354         ret->default_passwd_callback=0;
1355         ret->default_passwd_callback_userdata=NULL;
1356         ret->client_cert_cb=0;
1357
1358         ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
1359                         LHASH_COMP_FN(SSL_SESSION_cmp));
1360         if (ret->sessions == NULL) goto err;
1361         ret->cert_store=X509_STORE_new();
1362         if (ret->cert_store == NULL) goto err;
1363
1364         ssl_create_cipher_list(ret->method,
1365                 &ret->cipher_list,&ret->cipher_list_by_id,
1366                 SSL_DEFAULT_CIPHER_LIST);
1367         if (ret->cipher_list == NULL
1368             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1369                 {
1370                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1371                 goto err2;
1372                 }
1373
1374         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1375                 {
1376                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1377                 goto err2;
1378                 }
1379         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1380                 {
1381                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1382                 goto err2;
1383                 }
1384         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1385                 {
1386                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1387                 goto err2;
1388                 }
1389
1390         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1391                 goto err;
1392
1393         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
1394
1395         ret->extra_certs=NULL;
1396         ret->comp_methods=SSL_COMP_get_compression_methods();
1397
1398         return(ret);
1399 err:
1400         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1401 err2:
1402         if (ret != NULL) SSL_CTX_free(ret);
1403         return(NULL);
1404         }
1405
1406 #if 0
1407 static void SSL_COMP_free(SSL_COMP *comp)
1408     { OPENSSL_free(comp); }
1409 #endif
1410
1411 void SSL_CTX_free(SSL_CTX *a)
1412         {
1413         int i;
1414
1415         if (a == NULL) return;
1416
1417         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1418 #ifdef REF_PRINT
1419         REF_PRINT("SSL_CTX",a);
1420 #endif
1421         if (i > 0) return;
1422 #ifdef REF_CHECK
1423         if (i < 0)
1424                 {
1425                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1426                 abort(); /* ok */
1427                 }
1428 #endif
1429
1430         /*
1431          * Free internal session cache. However: the remove_cb() may reference
1432          * the ex_data of SSL_CTX, thus the ex_data store can only be removed
1433          * after the sessions were flushed.
1434          * As the ex_data handling routines might also touch the session cache,
1435          * the most secure solution seems to be: empty (flush) the cache, then
1436          * free ex_data, then finally free the cache.
1437          * (See ticket [openssl.org #212].)
1438          */
1439         if (a->sessions != NULL)
1440                 SSL_CTX_flush_sessions(a,0);
1441
1442         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
1443
1444         if (a->sessions != NULL)
1445                 lh_free(a->sessions);
1446
1447         if (a->cert_store != NULL)
1448                 X509_STORE_free(a->cert_store);
1449         if (a->cipher_list != NULL)
1450                 sk_SSL_CIPHER_free(a->cipher_list);
1451         if (a->cipher_list_by_id != NULL)
1452                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1453         if (a->cert != NULL)
1454                 ssl_cert_free(a->cert);
1455         if (a->client_CA != NULL)
1456                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1457         if (a->extra_certs != NULL)
1458                 sk_X509_pop_free(a->extra_certs,X509_free);
1459 #if 0 /* This should never be done, since it removes a global database */
1460         if (a->comp_methods != NULL)
1461                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1462 #else
1463         a->comp_methods = NULL;
1464 #endif
1465         OPENSSL_free(a);
1466         }
1467
1468 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1469         {
1470         ctx->default_passwd_callback=cb;
1471         }
1472
1473 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1474         {
1475         ctx->default_passwd_callback_userdata=u;
1476         }
1477
1478 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
1479         {
1480         ctx->app_verify_callback=cb;
1481         ctx->app_verify_arg=arg;
1482         }
1483
1484 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1485         {
1486         ctx->verify_mode=mode;
1487         ctx->default_verify_callback=cb;
1488         }
1489
1490 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1491         {
1492         ctx->verify_depth=depth;
1493         }
1494
1495 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1496         {
1497         CERT_PKEY *cpk;
1498         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1499         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1500         int rsa_tmp_export,dh_tmp_export,kl;
1501         unsigned long mask,emask;
1502         int have_ecc_cert, have_ecdh_tmp, ecdh_ok, ecdsa_ok, ecc_pkey_size;
1503         X509 *x = NULL;
1504         EVP_PKEY *ecc_pkey = NULL;
1505         int signature_nid = 0;
1506
1507         if (c == NULL) return;
1508
1509         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1510
1511 #ifndef OPENSSL_NO_RSA
1512         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1513         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1514                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1515 #else
1516         rsa_tmp=rsa_tmp_export=0;
1517 #endif
1518 #ifndef OPENSSL_NO_DH
1519         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1520         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1521                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1522 #else
1523         dh_tmp=dh_tmp_export=0;
1524 #endif
1525
1526 #ifndef OPENSSL_NO_ECDH
1527         have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
1528 #endif
1529         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1530         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1531         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1532         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1533         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1534         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1535         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1536         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1537         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1538         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1539         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1540 /* FIX THIS EAY EAY EAY */
1541         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1542         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1543         cpk= &(c->pkeys[SSL_PKEY_ECC]);
1544         have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
1545         mask=0;
1546         emask=0;
1547
1548 #ifdef CIPHER_DEBUG
1549         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1550                 rsa_tmp,rsa_tmp_export,dh_tmp,
1551                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1552 #endif
1553
1554         if (rsa_enc || (rsa_tmp && rsa_sign))
1555                 mask|=SSL_kRSA;
1556         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1557                 emask|=SSL_kRSA;
1558
1559 #if 0
1560         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1561         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1562                 (rsa_enc || rsa_sign || dsa_sign))
1563                 mask|=SSL_kEDH;
1564         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1565                 (rsa_enc || rsa_sign || dsa_sign))
1566                 emask|=SSL_kEDH;
1567 #endif
1568
1569         if (dh_tmp_export) 
1570                 emask|=SSL_kEDH;
1571
1572         if (dh_tmp)
1573                 mask|=SSL_kEDH;
1574
1575         if (dh_rsa) mask|=SSL_kDHr;
1576         if (dh_rsa_export) emask|=SSL_kDHr;
1577
1578         if (dh_dsa) mask|=SSL_kDHd;
1579         if (dh_dsa_export) emask|=SSL_kDHd;
1580
1581         if (rsa_enc || rsa_sign)
1582                 {
1583                 mask|=SSL_aRSA;
1584                 mask|=SSL_aRSA;
1585                 }
1586
1587         if (dsa_sign)
1588                 {
1589                 mask|=SSL_aDSS;
1590                 emask|=SSL_aDSS;
1591                 }
1592
1593         mask|=SSL_aNULL;
1594         emask|=SSL_aNULL;
1595
1596 #ifndef OPENSSL_NO_KRB5
1597         mask|=SSL_kKRB5|SSL_aKRB5;
1598         emask|=SSL_kKRB5|SSL_aKRB5;
1599 #endif
1600
1601         /* An ECC certificate may be usable for ECDH and/or
1602          * ECDSA cipher suites depending on the key usage extension.
1603          */
1604         if (have_ecc_cert)
1605                 {
1606                 /* This call populates extension flags (ex_flags) */
1607                 x = (c->pkeys[SSL_PKEY_ECC]).x509;
1608                 X509_check_purpose(x, -1, 0);
1609                 ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1610                     (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
1611                 ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
1612                     (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
1613                 ecc_pkey = X509_get_pubkey(x);
1614                 ecc_pkey_size = (ecc_pkey != NULL) ? 
1615                     EVP_PKEY_bits(ecc_pkey) : 0;
1616                 EVP_PKEY_free(ecc_pkey);
1617                 if ((x->sig_alg) && (x->sig_alg->algorithm))
1618                         signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1619 #ifndef OPENSSL_NO_ECDH
1620                 if (ecdh_ok)
1621                         {
1622                         if ((signature_nid == NID_md5WithRSAEncryption) ||
1623                             (signature_nid == NID_md4WithRSAEncryption) ||
1624                             (signature_nid == NID_md2WithRSAEncryption))
1625                                 {
1626                                 mask|=SSL_kECDH|SSL_aRSA;
1627                                 if (ecc_pkey_size <= 163)
1628                                         emask|=SSL_kECDH|SSL_aRSA;
1629                                 }
1630                         if (signature_nid == NID_ecdsa_with_SHA1)
1631                                 {
1632                                 mask|=SSL_kECDH|SSL_aECDSA;
1633                                 if (ecc_pkey_size <= 163)
1634                                         emask|=SSL_kECDH|SSL_aECDSA;
1635                                 }
1636                         }
1637 #endif
1638 #ifndef OPENSSL_NO_ECDSA
1639                 if (ecdsa_ok)
1640                         {
1641                         mask|=SSL_aECDSA;
1642                         emask|=SSL_aECDSA;
1643                         }
1644 #endif
1645                 }
1646
1647 #ifndef OPENSSL_NO_ECDH
1648         if (have_ecdh_tmp)
1649                 {
1650                 mask|=SSL_kECDHE;
1651                 emask|=SSL_kECDHE;
1652                 }
1653 #endif
1654         c->mask=mask;
1655         c->export_mask=emask;
1656         c->valid=1;
1657         }
1658
1659 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
1660 #define ku_reject(x, usage) \
1661         (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
1662
1663 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
1664         {
1665         unsigned long alg = cs->algorithms;
1666         EVP_PKEY *pkey = NULL;
1667         int keysize = 0;
1668         int signature_nid = 0;
1669
1670         if (SSL_C_IS_EXPORT(cs))
1671                 {
1672                 /* ECDH key length in export ciphers must be <= 163 bits */
1673                 pkey = X509_get_pubkey(x);
1674                 if (pkey == NULL) return 0;
1675                 keysize = EVP_PKEY_bits(pkey);
1676                 EVP_PKEY_free(pkey);
1677                 if (keysize > 163) return 0;
1678                 }
1679
1680         /* This call populates the ex_flags field correctly */
1681         X509_check_purpose(x, -1, 0);
1682         if ((x->sig_alg) && (x->sig_alg->algorithm))
1683                 signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
1684         if (alg & SSL_kECDH) 
1685                 {
1686                 /* key usage, if present, must allow key agreement */
1687                 if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
1688                         {
1689                         return 0;
1690                         }
1691                 if (alg & SSL_aECDSA) 
1692                         {
1693                         /* signature alg must be ECDSA */
1694                         if (signature_nid != NID_ecdsa_with_SHA1)
1695                                 {
1696                                 return 0;
1697                                 }
1698                         }
1699                 if (alg & SSL_aRSA)
1700                         {
1701                         /* signature alg must be RSA */
1702                         if ((signature_nid != NID_md5WithRSAEncryption) &&
1703                             (signature_nid != NID_md4WithRSAEncryption) &&
1704                             (signature_nid != NID_md2WithRSAEncryption))
1705                                 {
1706                                 return 0;
1707                                 }
1708                         }
1709                 } 
1710         else if (alg & SSL_aECDSA)
1711                 {
1712                 /* key usage, if present, must allow signing */
1713                 if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
1714                         {
1715                         return 0;
1716                         }
1717                 }
1718
1719         return 1;  /* all checks are ok */
1720         }
1721
1722 /* THIS NEEDS CLEANING UP */
1723 X509 *ssl_get_server_send_cert(SSL *s)
1724         {
1725         unsigned long alg,mask,kalg;
1726         CERT *c;
1727         int i,is_export;
1728
1729         c=s->cert;
1730         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1731         alg=s->s3->tmp.new_cipher->algorithms;
1732         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
1733         mask=is_export?c->export_mask:c->mask;
1734         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1735
1736         if (kalg & SSL_kECDH)
1737                 {
1738                 /* we don't need to look at SSL_kECDHE 
1739                  * since no certificate is needed for
1740                  * anon ECDH and for authenticated
1741                  * ECDHE, the check for the auth 
1742                  * algorithm will set i correctly
1743                  * NOTE: For ECDH-RSA, we need an ECC
1744                  * not an RSA cert but for ECDHE-RSA
1745                  * we need an RSA cert. Placing the
1746                  * checks for SSL_kECDH before RSA
1747                  * checks ensures the correct cert is chosen.
1748                  */
1749                 i=SSL_PKEY_ECC;
1750                 }
1751         else if (kalg & SSL_aECDSA)
1752                 {
1753                 i=SSL_PKEY_ECC;
1754                 }
1755         else if (kalg & SSL_kDHr)
1756                 i=SSL_PKEY_DH_RSA;
1757         else if (kalg & SSL_kDHd)
1758                 i=SSL_PKEY_DH_DSA;
1759         else if (kalg & SSL_aDSS)
1760                 i=SSL_PKEY_DSA_SIGN;
1761         else if (kalg & SSL_aRSA)
1762                 {
1763                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1764                         i=SSL_PKEY_RSA_SIGN;
1765                 else
1766                         i=SSL_PKEY_RSA_ENC;
1767                 }
1768         else if (kalg & SSL_aKRB5)
1769                 {
1770                 /* VRS something else here? */
1771                 return(NULL);
1772                 }
1773         else /* if (kalg & SSL_aNULL) */
1774                 {
1775                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
1776                 return(NULL);
1777                 }
1778         if (c->pkeys[i].x509 == NULL) return(NULL);
1779
1780         return(c->pkeys[i].x509);
1781         }
1782
1783 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1784         {
1785         unsigned long alg;
1786         CERT *c;
1787
1788         alg=cipher->algorithms;
1789         c=s->cert;
1790
1791         if ((alg & SSL_aDSS) &&
1792                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1793                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1794         else if (alg & SSL_aRSA)
1795                 {
1796                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1797                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1798                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1799                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1800                 else
1801                         return(NULL);
1802                 }
1803         else if ((alg & SSL_aECDSA) &&
1804                  (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
1805                 return(c->pkeys[SSL_PKEY_ECC].privatekey);
1806         else /* if (alg & SSL_aNULL) */
1807                 {
1808                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
1809                 return(NULL);
1810                 }
1811         }
1812
1813 void ssl_update_cache(SSL *s,int mode)
1814         {
1815         int i;
1816
1817         /* If the session_id_length is 0, we are not supposed to cache it,
1818          * and it would be rather hard to do anyway :-) */
1819         if (s->session->session_id_length == 0) return;
1820
1821         i=s->ctx->session_cache_mode;
1822         if ((i & mode) && (!s->hit)
1823                 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
1824                     || SSL_CTX_add_session(s->ctx,s->session))
1825                 && (s->ctx->new_session_cb != NULL))
1826                 {
1827                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1828                 if (!s->ctx->new_session_cb(s,s->session))
1829                         SSL_SESSION_free(s->session);
1830                 }
1831
1832         /* auto flush every 255 connections */
1833         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1834                 ((i & mode) == mode))
1835                 {
1836                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1837                         ?s->ctx->stats.sess_connect_good
1838                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1839                         {
1840                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1841                         }
1842                 }
1843         }
1844
1845 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1846         {
1847         return(s->method);
1848         }
1849
1850 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1851         {
1852         int conn= -1;
1853         int ret=1;
1854
1855         if (s->method != meth)
1856                 {
1857                 if (s->handshake_func != NULL)
1858                         conn=(s->handshake_func == s->method->ssl_connect);
1859
1860                 if (s->method->version == meth->version)
1861                         s->method=meth;
1862                 else
1863                         {
1864                         s->method->ssl_free(s);
1865                         s->method=meth;
1866                         ret=s->method->ssl_new(s);
1867                         }
1868
1869                 if (conn == 1)
1870                         s->handshake_func=meth->ssl_connect;
1871                 else if (conn == 0)
1872                         s->handshake_func=meth->ssl_accept;
1873                 }
1874         return(ret);
1875         }
1876
1877 int SSL_get_error(SSL *s,int i)
1878         {
1879         int reason;
1880         unsigned long l;
1881         BIO *bio;
1882
1883         if (i > 0) return(SSL_ERROR_NONE);
1884
1885         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1886          * etc, where we do encode the error */
1887         if ((l=ERR_peek_error()) != 0)
1888                 {
1889                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1890                         return(SSL_ERROR_SYSCALL);
1891                 else
1892                         return(SSL_ERROR_SSL);
1893                 }
1894
1895         if ((i < 0) && SSL_want_read(s))
1896                 {
1897                 bio=SSL_get_rbio(s);
1898                 if (BIO_should_read(bio))
1899                         return(SSL_ERROR_WANT_READ);
1900                 else if (BIO_should_write(bio))
1901                         /* This one doesn't make too much sense ... We never try
1902                          * to write to the rbio, and an application program where
1903                          * rbio and wbio are separate couldn't even know what it
1904                          * should wait for.
1905                          * However if we ever set s->rwstate incorrectly
1906                          * (so that we have SSL_want_read(s) instead of
1907                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1908                          * this test works around that bug; so it might be safer
1909                          * to keep it. */
1910                         return(SSL_ERROR_WANT_WRITE);
1911                 else if (BIO_should_io_special(bio))
1912                         {
1913                         reason=BIO_get_retry_reason(bio);
1914                         if (reason == BIO_RR_CONNECT)
1915                                 return(SSL_ERROR_WANT_CONNECT);
1916                         else if (reason == BIO_RR_ACCEPT)
1917                                 return(SSL_ERROR_WANT_ACCEPT);
1918                         else
1919                                 return(SSL_ERROR_SYSCALL); /* unknown */
1920                         }
1921                 }
1922
1923         if ((i < 0) && SSL_want_write(s))
1924                 {
1925                 bio=SSL_get_wbio(s);
1926                 if (BIO_should_write(bio))
1927                         return(SSL_ERROR_WANT_WRITE);
1928                 else if (BIO_should_read(bio))
1929                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1930                         return(SSL_ERROR_WANT_READ);
1931                 else if (BIO_should_io_special(bio))
1932                         {
1933                         reason=BIO_get_retry_reason(bio);
1934                         if (reason == BIO_RR_CONNECT)
1935                                 return(SSL_ERROR_WANT_CONNECT);
1936                         else if (reason == BIO_RR_ACCEPT)
1937                                 return(SSL_ERROR_WANT_ACCEPT);
1938                         else
1939                                 return(SSL_ERROR_SYSCALL);
1940                         }
1941                 }
1942         if ((i < 0) && SSL_want_x509_lookup(s))
1943                 {
1944                 return(SSL_ERROR_WANT_X509_LOOKUP);
1945                 }
1946
1947         if (i == 0)
1948                 {
1949                 if (s->version == SSL2_VERSION)
1950                         {
1951                         /* assume it is the socket being closed */
1952                         return(SSL_ERROR_ZERO_RETURN);
1953                         }
1954                 else
1955                         {
1956                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1957                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1958                                 return(SSL_ERROR_ZERO_RETURN);
1959                         }
1960                 }
1961         return(SSL_ERROR_SYSCALL);
1962         }
1963
1964 int SSL_do_handshake(SSL *s)
1965         {
1966         int ret=1;
1967
1968         if (s->handshake_func == NULL)
1969                 {
1970                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1971                 return(-1);
1972                 }
1973
1974         s->method->ssl_renegotiate_check(s);
1975
1976         if (SSL_in_init(s) || SSL_in_before(s))
1977                 {
1978                 ret=s->handshake_func(s);
1979                 }
1980         return(ret);
1981         }
1982
1983 /* For the next 2 functions, SSL_clear() sets shutdown and so
1984  * one of these calls will reset it */
1985 void SSL_set_accept_state(SSL *s)
1986         {
1987         s->server=1;
1988         s->shutdown=0;
1989         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1990         s->handshake_func=s->method->ssl_accept;
1991         /* clear the current cipher */
1992         ssl_clear_cipher_ctx(s);
1993         }
1994
1995 void SSL_set_connect_state(SSL *s)
1996         {
1997         s->server=0;
1998         s->shutdown=0;
1999         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
2000         s->handshake_func=s->method->ssl_connect;
2001         /* clear the current cipher */
2002         ssl_clear_cipher_ctx(s);
2003         }
2004
2005 int ssl_undefined_function(SSL *s)
2006         {
2007         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2008         return(0);
2009         }
2010
2011 SSL_METHOD *ssl_bad_method(int ver)
2012         {
2013         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2014         return(NULL);
2015         }
2016
2017 const char *SSL_get_version(SSL *s)
2018         {
2019         if (s->version == TLS1_VERSION)
2020                 return("TLSv1");
2021         else if (s->version == SSL3_VERSION)
2022                 return("SSLv3");
2023         else if (s->version == SSL2_VERSION)
2024                 return("SSLv2");
2025         else
2026                 return("unknown");
2027         }
2028
2029 SSL *SSL_dup(SSL *s)
2030         {
2031         STACK_OF(X509_NAME) *sk;
2032         X509_NAME *xn;
2033         SSL *ret;
2034         int i;
2035                  
2036         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
2037             return(NULL);
2038
2039         ret->version = s->version;
2040         ret->type = s->type;
2041         ret->method = s->method;
2042
2043         if (s->session != NULL)
2044                 {
2045                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
2046                 SSL_copy_session_id(ret,s);
2047                 }
2048         else
2049                 {
2050                 /* No session has been established yet, so we have to expect
2051                  * that s->cert or ret->cert will be changed later --
2052                  * they should not both point to the same object,
2053                  * and thus we can't use SSL_copy_session_id. */
2054
2055                 ret->method->ssl_free(ret);
2056                 ret->method = s->method;
2057                 ret->method->ssl_new(ret);
2058
2059                 if (s->cert != NULL)
2060                         {
2061                         if (ret->cert != NULL)
2062                                 {
2063                                 ssl_cert_free(ret->cert);
2064                                 }
2065                         ret->cert = ssl_cert_dup(s->cert);
2066                         if (ret->cert == NULL)
2067                                 goto err;
2068                         }
2069                                 
2070                 SSL_set_session_id_context(ret,
2071                         s->sid_ctx, s->sid_ctx_length);
2072                 }
2073
2074         ret->options=s->options;
2075         ret->mode=s->mode;
2076         SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
2077         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
2078         ret->msg_callback = s->msg_callback;
2079         ret->msg_callback_arg = s->msg_callback_arg;
2080         SSL_set_verify(ret,SSL_get_verify_mode(s),
2081                 SSL_get_verify_callback(s));
2082         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
2083         ret->generate_session_id = s->generate_session_id;
2084
2085         SSL_set_info_callback(ret,SSL_get_info_callback(s));
2086         
2087         ret->debug=s->debug;
2088
2089         /* copy app data, a little dangerous perhaps */
2090         if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
2091                 goto err;
2092
2093         /* setup rbio, and wbio */
2094         if (s->rbio != NULL)
2095                 {
2096                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
2097                         goto err;
2098                 }
2099         if (s->wbio != NULL)
2100                 {
2101                 if (s->wbio != s->rbio)
2102                         {
2103                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
2104                                 goto err;
2105                         }
2106                 else
2107                         ret->wbio=ret->rbio;
2108                 }
2109         ret->rwstate = s->rwstate;
2110         ret->in_handshake = s->in_handshake;
2111         ret->handshake_func = s->handshake_func;
2112         ret->server = s->server;
2113         ret->new_session = s->new_session;
2114         ret->quiet_shutdown = s->quiet_shutdown;
2115         ret->shutdown=s->shutdown;
2116         ret->state=s->state; /* SSL_dup does not really work at any state, though */
2117         ret->rstate=s->rstate;
2118         ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
2119         ret->hit=s->hit;
2120         ret->purpose=s->purpose;
2121         ret->trust=s->trust;
2122
2123         /* dup the cipher_list and cipher_list_by_id stacks */
2124         if (s->cipher_list != NULL)
2125                 {
2126                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
2127                         goto err;
2128                 }
2129         if (s->cipher_list_by_id != NULL)
2130                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
2131                         == NULL)
2132                         goto err;
2133
2134         /* Dup the client_CA list */
2135         if (s->client_CA != NULL)
2136                 {
2137                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
2138                 ret->client_CA=sk;
2139                 for (i=0; i<sk_X509_NAME_num(sk); i++)
2140                         {
2141                         xn=sk_X509_NAME_value(sk,i);
2142                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
2143                                 {
2144                                 X509_NAME_free(xn);
2145                                 goto err;
2146                                 }
2147                         }
2148                 }
2149
2150         if (0)
2151                 {
2152 err:
2153                 if (ret != NULL) SSL_free(ret);
2154                 ret=NULL;
2155                 }
2156         return(ret);
2157         }
2158
2159 void ssl_clear_cipher_ctx(SSL *s)
2160         {
2161         if (s->enc_read_ctx != NULL)
2162                 {
2163                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
2164                 OPENSSL_free(s->enc_read_ctx);
2165                 s->enc_read_ctx=NULL;
2166                 }
2167         if (s->enc_write_ctx != NULL)
2168                 {
2169                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
2170                 OPENSSL_free(s->enc_write_ctx);
2171                 s->enc_write_ctx=NULL;
2172                 }
2173         if (s->expand != NULL)
2174                 {
2175                 COMP_CTX_free(s->expand);
2176                 s->expand=NULL;
2177                 }
2178         if (s->compress != NULL)
2179                 {
2180                 COMP_CTX_free(s->compress);
2181                 s->compress=NULL;
2182                 }
2183         }
2184
2185 /* Fix this function so that it takes an optional type parameter */
2186 X509 *SSL_get_certificate(SSL *s)
2187         {
2188         if (s->cert != NULL)
2189                 return(s->cert->key->x509);
2190         else
2191                 return(NULL);
2192         }
2193
2194 /* Fix this function so that it takes an optional type parameter */
2195 EVP_PKEY *SSL_get_privatekey(SSL *s)
2196         {
2197         if (s->cert != NULL)
2198                 return(s->cert->key->privatekey);
2199         else
2200                 return(NULL);
2201         }
2202
2203 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
2204         {
2205         if ((s->session != NULL) && (s->session->cipher != NULL))
2206                 return(s->session->cipher);
2207         return(NULL);
2208         }
2209
2210 const COMP_METHOD *SSL_get_current_compression(SSL *s)
2211         {
2212         if (s->compress != NULL)
2213                 return(s->compress->meth);
2214         return(NULL);
2215         }
2216
2217 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
2218         {
2219         if (s->expand != NULL)
2220                 return(s->expand->meth);
2221         return(NULL);
2222         }
2223
2224 int ssl_init_wbio_buffer(SSL *s,int push)
2225         {
2226         BIO *bbio;
2227
2228         if (s->bbio == NULL)
2229                 {
2230                 bbio=BIO_new(BIO_f_buffer());
2231                 if (bbio == NULL) return(0);
2232                 s->bbio=bbio;
2233                 }
2234         else
2235                 {
2236                 bbio=s->bbio;
2237                 if (s->bbio == s->wbio)
2238                         s->wbio=BIO_pop(s->wbio);
2239                 }
2240         (void)BIO_reset(bbio);
2241 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
2242         if (!BIO_set_read_buffer_size(bbio,1))
2243                 {
2244                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
2245                 return(0);
2246                 }
2247         if (push)
2248                 {
2249                 if (s->wbio != bbio)
2250                         s->wbio=BIO_push(bbio,s->wbio);
2251                 }
2252         else
2253                 {
2254                 if (s->wbio == bbio)
2255                         s->wbio=BIO_pop(bbio);
2256                 }
2257         return(1);
2258         }
2259
2260 void ssl_free_wbio_buffer(SSL *s)
2261         {
2262         if (s->bbio == NULL) return;
2263
2264         if (s->bbio == s->wbio)
2265                 {
2266                 /* remove buffering */
2267                 s->wbio=BIO_pop(s->wbio);
2268 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
2269                 assert(s->wbio != NULL);
2270 #endif  
2271         }
2272         BIO_free(s->bbio);
2273         s->bbio=NULL;
2274         }
2275         
2276 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
2277         {
2278         ctx->quiet_shutdown=mode;
2279         }
2280
2281 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
2282         {
2283         return(ctx->quiet_shutdown);
2284         }
2285
2286 void SSL_set_quiet_shutdown(SSL *s,int mode)
2287         {
2288         s->quiet_shutdown=mode;
2289         }
2290
2291 int SSL_get_quiet_shutdown(SSL *s)
2292         {
2293         return(s->quiet_shutdown);
2294         }
2295
2296 void SSL_set_shutdown(SSL *s,int mode)
2297         {
2298         s->shutdown=mode;
2299         }
2300
2301 int SSL_get_shutdown(SSL *s)
2302         {
2303         return(s->shutdown);
2304         }
2305
2306 int SSL_version(SSL *s)
2307         {
2308         return(s->version);
2309         }
2310
2311 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
2312         {
2313         return(ssl->ctx);
2314         }
2315
2316 #ifndef OPENSSL_NO_STDIO
2317 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
2318         {
2319         return(X509_STORE_set_default_paths(ctx->cert_store));
2320         }
2321
2322 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
2323                 const char *CApath)
2324         {
2325         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
2326         }
2327 #endif
2328
2329 void SSL_set_info_callback(SSL *ssl,
2330                            void (*cb)(const SSL *ssl,int type,int val))
2331         {
2332         ssl->info_callback=cb;
2333         }
2334
2335 void (*SSL_get_info_callback(SSL *ssl))(const SSL *ssl,int type,int val)
2336         {
2337         return ssl->info_callback;
2338         }
2339
2340 int SSL_state(SSL *ssl)
2341         {
2342         return(ssl->state);
2343         }
2344
2345 void SSL_set_verify_result(SSL *ssl,long arg)
2346         {
2347         ssl->verify_result=arg;
2348         }
2349
2350 long SSL_get_verify_result(SSL *ssl)
2351         {
2352         return(ssl->verify_result);
2353         }
2354
2355 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2356                          CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2357         {
2358         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
2359                                 new_func, dup_func, free_func);
2360         }
2361
2362 int SSL_set_ex_data(SSL *s,int idx,void *arg)
2363         {
2364         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2365         }
2366
2367 void *SSL_get_ex_data(SSL *s,int idx)
2368         {
2369         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2370         }
2371
2372 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
2373                              CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
2374         {
2375         return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
2376                                 new_func, dup_func, free_func);
2377         }
2378
2379 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
2380         {
2381         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
2382         }
2383
2384 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
2385         {
2386         return(CRYPTO_get_ex_data(&s->ex_data,idx));
2387         }
2388
2389 int ssl_ok(SSL *s)
2390         {
2391         return(1);
2392         }
2393
2394 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
2395         {
2396         return(ctx->cert_store);
2397         }
2398
2399 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
2400         {
2401         if (ctx->cert_store != NULL)
2402                 X509_STORE_free(ctx->cert_store);
2403         ctx->cert_store=store;
2404         }
2405
2406 int SSL_want(SSL *s)
2407         {
2408         return(s->rwstate);
2409         }
2410
2411 /*!
2412  * \brief Set the callback for generating temporary RSA keys.
2413  * \param ctx the SSL context.
2414  * \param cb the callback
2415  */
2416
2417 #ifndef OPENSSL_NO_RSA
2418 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
2419                                                           int is_export,
2420                                                           int keylength))
2421     {
2422     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2423     }
2424
2425 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
2426                                                   int is_export,
2427                                                   int keylength))
2428     {
2429     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)())cb);
2430     }
2431 #endif
2432
2433 #ifdef DOXYGEN
2434 /*!
2435  * \brief The RSA temporary key callback function.
2436  * \param ssl the SSL session.
2437  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
2438  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
2439  * of the required key in bits.
2440  * \return the temporary RSA key.
2441  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
2442  */
2443
2444 RSA *cb(SSL *ssl,int is_export,int keylength)
2445     {}
2446 #endif
2447
2448 /*!
2449  * \brief Set the callback for generating temporary DH keys.
2450  * \param ctx the SSL context.
2451  * \param dh the callback
2452  */
2453
2454 #ifndef OPENSSL_NO_DH
2455 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
2456                                                         int keylength))
2457         {
2458         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2459         }
2460
2461 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
2462                                                 int keylength))
2463         {
2464         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)())dh);
2465         }
2466 #endif
2467
2468 #ifndef OPENSSL_NO_ECDH
2469 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2470                                                         int keylength))
2471         {
2472         SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)())ecdh);
2473         }
2474
2475 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
2476                                                 int keylength))
2477         {
2478         SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)())ecdh);
2479         }
2480 #endif
2481
2482
2483 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))
2484         {
2485         SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)())cb);
2486         }
2487 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))
2488         {
2489         SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)())cb);
2490         }
2491
2492
2493
2494 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
2495 #include "../crypto/bio/bss_file.c"
2496 #endif
2497
2498 IMPLEMENT_STACK_OF(SSL_CIPHER)
2499 IMPLEMENT_STACK_OF(SSL_COMP)