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