Non-copying interface to BIO pairs.
[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 #include <stdio.h>
62 #include <openssl/objects.h>
63 #include <openssl/lhash.h>
64 #include "ssl_locl.h"
65
66 char *SSL_version_str=OPENSSL_VERSION_TEXT;
67
68 static STACK *ssl_meth=NULL;
69 static STACK *ssl_ctx_meth=NULL;
70 static int ssl_meth_num=0;
71 static int ssl_ctx_meth_num=0;
72
73 OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
74         ssl_undefined_function,
75         ssl_undefined_function,
76         ssl_undefined_function,
77         ssl_undefined_function,
78         ssl_undefined_function,
79         ssl_undefined_function,
80         };
81
82 int SSL_clear(SSL *s)
83         {
84         int state;
85
86         if (s->method == NULL)
87                 {
88                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
89                 return(0);
90                 }
91
92         s->error=0;
93         s->hit=0;
94         s->shutdown=0;
95
96 #if 0
97         /* This is set if we are doing dynamic renegotiation so keep
98          * the old cipher.  It is sort of a SSL_clear_lite :-) */
99         if (s->new_session) return(1);
100 #endif
101
102         state=s->state; /* Keep to check if we throw away the session-id */
103         s->type=0;
104
105         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
106
107         s->version=s->method->version;
108         s->client_version=s->version;
109         s->rwstate=SSL_NOTHING;
110         s->rstate=SSL_ST_READ_HEADER;
111         s->read_ahead=s->ctx->read_ahead;
112
113         if (s->init_buf != NULL)
114                 {
115                 BUF_MEM_free(s->init_buf);
116                 s->init_buf=NULL;
117                 }
118
119         ssl_clear_cipher_ctx(s);
120
121         if (ssl_clear_bad_session(s))
122                 {
123                 SSL_SESSION_free(s->session);
124                 s->session=NULL;
125                 }
126
127         s->first_packet=0;
128
129 #if 1
130         /* Check to see if we were changed into a different method, if
131          * so, revert back if we are not doing session-id reuse. */
132         if ((s->session == NULL) && (s->method != s->ctx->method))
133                 {
134                 s->method->ssl_free(s);
135                 s->method=s->ctx->method;
136                 if (!s->method->ssl_new(s))
137                         return(0);
138                 }
139         else
140 #endif
141                 s->method->ssl_clear(s);
142         return(1);
143         }
144
145 /** Used to change an SSL_CTXs default SSL method type */
146 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
147         {
148         STACK_OF(SSL_CIPHER) *sk;
149
150         ctx->method=meth;
151
152         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
153                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
154         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
155                 {
156                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
157                 return(0);
158                 }
159         return(1);
160         }
161
162 SSL *SSL_new(SSL_CTX *ctx)
163         {
164         SSL *s;
165
166         if (ctx == NULL)
167                 {
168                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
169                 return(NULL);
170                 }
171         if (ctx->method == NULL)
172                 {
173                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
174                 return(NULL);
175                 }
176
177         s=(SSL *)Malloc(sizeof(SSL));
178         if (s == NULL) goto err;
179         memset(s,0,sizeof(SSL));
180
181         if (ctx->cert != NULL)
182                 {
183                 /* Earlier library versions used to copy the pointer to
184                  * the CERT, not its contents; only when setting new
185                  * parameters for the per-SSL copy, ssl_cert_new would be
186                  * called (and the direct reference to the per-SSL_CTX
187                  * settings would be lost, but those still were indirectly
188                  * accessed for various purposes, and for that reason they
189                  * used to be known as s->ctx->default_cert).
190                  * Now we don't look at the SSL_CTX's CERT after having
191                  * duplicated it once. */
192
193                 s->cert = ssl_cert_dup(ctx->cert);
194                 if (s->cert == NULL)
195                         goto err;
196                 }
197         else
198                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
199         s->sid_ctx_length=ctx->sid_ctx_length;
200         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
201         s->verify_mode=ctx->verify_mode;
202         s->verify_depth=ctx->verify_depth;
203         s->verify_callback=ctx->default_verify_callback;
204         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
205         s->ctx=ctx;
206
207         s->verify_result=X509_V_OK;
208
209         s->method=ctx->method;
210
211         if (!s->method->ssl_new(s))
212                 goto err;
213
214         s->quiet_shutdown=ctx->quiet_shutdown;
215         s->references=1;
216         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
217         s->options=ctx->options;
218         s->mode=ctx->mode;
219         SSL_clear(s);
220
221         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
222
223         return(s);
224 err:
225         if (s != NULL)
226                 {
227                 if (s->cert != NULL)
228                         ssl_cert_free(s->cert);
229                 if (s->ctx != NULL)
230                         SSL_CTX_free(s->ctx); /* decrement reference count */
231                 Free(s);
232                 }
233         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
234         return(NULL);
235         }
236
237 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
238                                    unsigned int sid_ctx_len)
239     {
240     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
241         {
242         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
243         return 0;
244         }
245     ctx->sid_ctx_length=sid_ctx_len;
246     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
247
248     return 1;
249     }
250
251 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
252                                unsigned int sid_ctx_len)
253     {
254     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
255         {
256         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
257         return 0;
258         }
259     ssl->sid_ctx_length=sid_ctx_len;
260     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
261
262     return 1;
263     }
264
265 void SSL_free(SSL *s)
266         {
267         int i;
268
269         if(s == NULL)
270             return;
271
272         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
273 #ifdef REF_PRINT
274         REF_PRINT("SSL",s);
275 #endif
276         if (i > 0) return;
277 #ifdef REF_CHECK
278         if (i < 0)
279                 {
280                 fprintf(stderr,"SSL_free, bad reference count\n");
281                 abort(); /* ok */
282                 }
283 #endif
284
285         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
286
287         if (s->bbio != NULL)
288                 {
289                 /* If the buffering BIO is in place, pop it off */
290                 if (s->bbio == s->wbio)
291                         {
292                         s->wbio=BIO_pop(s->wbio);
293                         }
294                 BIO_free(s->bbio);
295                 s->bbio=NULL;
296                 }
297         if (s->rbio != NULL)
298                 BIO_free_all(s->rbio);
299         if ((s->wbio != NULL) && (s->wbio != s->rbio))
300                 BIO_free_all(s->wbio);
301
302         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
303
304         /* add extra stuff */
305         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
306         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
307
308         /* Make the next call work :-) */
309         if (s->session != NULL)
310                 {
311                 ssl_clear_bad_session(s);
312                 SSL_SESSION_free(s->session);
313                 }
314
315         ssl_clear_cipher_ctx(s);
316
317         if (s->cert != NULL) ssl_cert_free(s->cert);
318         /* Free up if allocated */
319
320         if (s->ctx) SSL_CTX_free(s->ctx);
321
322         if (s->client_CA != NULL)
323                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
324
325         if (s->method != NULL) s->method->ssl_free(s);
326
327         Free((char *)s);
328         }
329
330 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
331         {
332         /* If the output buffering BIO is still in place, remove it
333          */
334         if (s->bbio != NULL)
335                 {
336                 if (s->wbio == s->bbio)
337                         {
338                         s->wbio=s->wbio->next_bio;
339                         s->bbio->next_bio=NULL;
340                         }
341                 }
342         if ((s->rbio != NULL) && (s->rbio != rbio))
343                 BIO_free_all(s->rbio);
344         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
345                 BIO_free_all(s->wbio);
346         s->rbio=rbio;
347         s->wbio=wbio;
348         }
349
350 BIO *SSL_get_rbio(SSL *s)
351         { return(s->rbio); }
352
353 BIO *SSL_get_wbio(SSL *s)
354         { return(s->wbio); }
355
356 int SSL_get_fd(SSL *s)
357         {
358         int ret= -1;
359         BIO *b,*r;
360
361         b=SSL_get_rbio(s);
362         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
363         if (r != NULL)
364                 BIO_get_fd(r,&ret);
365         return(ret);
366         }
367
368 #ifndef NO_SOCK
369 int SSL_set_fd(SSL *s,int fd)
370         {
371         int ret=0;
372         BIO *bio=NULL;
373
374         bio=BIO_new(BIO_s_socket());
375
376         if (bio == NULL)
377                 {
378                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
379                 goto err;
380                 }
381         BIO_set_fd(bio,fd,BIO_NOCLOSE);
382         SSL_set_bio(s,bio,bio);
383         ret=1;
384 err:
385         return(ret);
386         }
387
388 int SSL_set_wfd(SSL *s,int fd)
389         {
390         int ret=0;
391         BIO *bio=NULL;
392
393         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
394                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
395                 {
396                 bio=BIO_new(BIO_s_socket());
397
398                 if (bio == NULL)
399                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
400                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
401                 SSL_set_bio(s,SSL_get_rbio(s),bio);
402                 }
403         else
404                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
405         ret=1;
406 err:
407         return(ret);
408         }
409
410 int SSL_set_rfd(SSL *s,int fd)
411         {
412         int ret=0;
413         BIO *bio=NULL;
414
415         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
416                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
417                 {
418                 bio=BIO_new(BIO_s_socket());
419
420                 if (bio == NULL)
421                         {
422                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
423                         goto err;
424                         }
425                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
426                 SSL_set_bio(s,bio,SSL_get_wbio(s));
427                 }
428         else
429                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
430         ret=1;
431 err:
432         return(ret);
433         }
434 #endif
435
436 int SSL_get_verify_mode(SSL *s)
437         {
438         return(s->verify_mode);
439         }
440
441 int SSL_get_verify_depth(SSL *s)
442         {
443         return(s->verify_depth);
444         }
445
446 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
447         {
448         return(s->verify_callback);
449         }
450
451 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
452         {
453         return(ctx->verify_mode);
454         }
455
456 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
457         {
458         return(ctx->verify_depth);
459         }
460
461 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
462         {
463         return(ctx->default_verify_callback);
464         }
465
466 void SSL_set_verify(SSL *s,int mode,
467                     int (*callback)(int ok,X509_STORE_CTX *ctx))
468         {
469         s->verify_mode=mode;
470         if (callback != NULL)
471                 s->verify_callback=callback;
472         }
473
474 void SSL_set_verify_depth(SSL *s,int depth)
475         {
476         s->verify_depth=depth;
477         }
478
479 void SSL_set_read_ahead(SSL *s,int yes)
480         {
481         s->read_ahead=yes;
482         }
483
484 int SSL_get_read_ahead(SSL *s)
485         {
486         return(s->read_ahead);
487         }
488
489 int SSL_pending(SSL *s)
490         {
491         return(s->method->ssl_pending(s));
492         }
493
494 X509 *SSL_get_peer_certificate(SSL *s)
495         {
496         X509 *r;
497         
498         if ((s == NULL) || (s->session == NULL))
499                 r=NULL;
500         else
501                 r=s->session->peer;
502
503         if (r == NULL) return(r);
504
505         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
506
507         return(r);
508         }
509
510 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
511         {
512         STACK_OF(X509) *r;
513         
514         if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
515                 r=NULL;
516         else
517                 r=s->session->sess_cert->cert_chain;
518
519         return(r);
520         }
521
522 /* Now in theory, since the calling process own 't' it should be safe to
523  * modify.  We need to be able to read f without being hassled */
524 void SSL_copy_session_id(SSL *t,SSL *f)
525         {
526         CERT *tmp;
527
528         /* Do we need to to SSL locking? */
529         SSL_set_session(t,SSL_get_session(f));
530
531         /* what if we are setup as SSLv2 but want to talk SSLv3 or
532          * vice-versa */
533         if (t->method != f->method)
534                 {
535                 t->method->ssl_free(t); /* cleanup current */
536                 t->method=f->method;    /* change method */
537                 t->method->ssl_new(t);  /* setup new */
538                 }
539
540         tmp=t->cert;
541         if (f->cert != NULL)
542                 {
543                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
544                 t->cert=f->cert;
545                 }
546         else
547                 t->cert=NULL;
548         if (tmp != NULL) ssl_cert_free(tmp);
549         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
550         }
551
552 /* Fix this so it checks all the valid key/cert options */
553 int SSL_CTX_check_private_key(SSL_CTX *ctx)
554         {
555         if (    (ctx == NULL) ||
556                 (ctx->cert == NULL) ||
557                 (ctx->cert->key->x509 == NULL))
558                 {
559                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
560                 return(0);
561                 }
562         if      (ctx->cert->key->privatekey == NULL)
563                 {
564                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
565                 return(0);
566                 }
567         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
568         }
569
570 /* Fix this function so that it takes an optional type parameter */
571 int SSL_check_private_key(SSL *ssl)
572         {
573         if (ssl == NULL)
574                 {
575                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
576                 return(0);
577                 }
578         if (ssl->cert == NULL)
579                 {
580                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
581                 return 0;
582                 }
583         if (ssl->cert->key->x509 == NULL)
584                 {
585                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
586                 return(0);
587                 }
588         if (ssl->cert->key->privatekey == NULL)
589                 {
590                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
591                 return(0);
592                 }
593         return(X509_check_private_key(ssl->cert->key->x509,
594                 ssl->cert->key->privatekey));
595         }
596
597 int SSL_accept(SSL *s)
598         {
599         if (s->handshake_func == 0)
600                 /* Not properly initialized yet */
601                 SSL_set_accept_state(s);
602
603         return(s->method->ssl_accept(s));
604         }
605
606 int SSL_connect(SSL *s)
607         {
608         if (s->handshake_func == 0)
609                 /* Not properly initialized yet */
610                 SSL_set_connect_state(s);
611
612         return(s->method->ssl_connect(s));
613         }
614
615 long SSL_get_default_timeout(SSL *s)
616         {
617         return(s->method->get_timeout());
618         }
619
620 int SSL_read(SSL *s,char *buf,int num)
621         {
622         if (s->handshake_func == 0)
623                 {
624                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
625                 return -1;
626                 }
627
628         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
629                 {
630                 s->rwstate=SSL_NOTHING;
631                 return(0);
632                 }
633         return(s->method->ssl_read(s,buf,num));
634         }
635
636 int SSL_peek(SSL *s,char *buf,int num)
637         {
638         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
639                 {
640                 return(0);
641                 }
642         return(s->method->ssl_peek(s,buf,num));
643         }
644
645 int SSL_write(SSL *s,const char *buf,int num)
646         {
647         if (s->handshake_func == 0)
648                 {
649                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
650                 return -1;
651                 }
652
653         if (s->shutdown & SSL_SENT_SHUTDOWN)
654                 {
655                 s->rwstate=SSL_NOTHING;
656                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
657                 return(-1);
658                 }
659         return(s->method->ssl_write(s,buf,num));
660         }
661
662 int SSL_shutdown(SSL *s)
663         {
664         /* Note that this function behaves differently from what one might
665          * expect.  Return values are 0 for no success (yet),
666          * 1 for success; but calling it once is usually not enough,
667          * even if blocking I/O is used (see ssl3_shutdown).
668          */
669
670         if (s->handshake_func == 0)
671                 {
672                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
673                 return -1;
674                 }
675
676         if ((s != NULL) && !SSL_in_init(s))
677                 return(s->method->ssl_shutdown(s));
678         else
679                 return(1);
680         }
681
682 int SSL_renegotiate(SSL *s)
683         {
684         s->new_session=1;
685         return(s->method->ssl_renegotiate(s));
686         }
687
688 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
689         {
690         long l;
691
692         switch (cmd)
693                 {
694         case SSL_CTRL_GET_READ_AHEAD:
695                 return(s->read_ahead);
696         case SSL_CTRL_SET_READ_AHEAD:
697                 l=s->read_ahead;
698                 s->read_ahead=larg;
699                 return(l);
700         case SSL_CTRL_OPTIONS:
701                 return(s->options|=larg);
702         case SSL_CTRL_MODE:
703                 return(s->mode|=larg);
704         default:
705                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
706                 }
707         }
708
709 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
710         {
711         long l;
712
713         switch (cmd)
714                 {
715         case SSL_CTRL_GET_READ_AHEAD:
716                 return(ctx->read_ahead);
717         case SSL_CTRL_SET_READ_AHEAD:
718                 l=ctx->read_ahead;
719                 ctx->read_ahead=larg;
720                 return(l);
721
722         case SSL_CTRL_SET_SESS_CACHE_SIZE:
723                 l=ctx->session_cache_size;
724                 ctx->session_cache_size=larg;
725                 return(l);
726         case SSL_CTRL_GET_SESS_CACHE_SIZE:
727                 return(ctx->session_cache_size);
728         case SSL_CTRL_SET_SESS_CACHE_MODE:
729                 l=ctx->session_cache_mode;
730                 ctx->session_cache_mode=larg;
731                 return(l);
732         case SSL_CTRL_GET_SESS_CACHE_MODE:
733                 return(ctx->session_cache_mode);
734
735         case SSL_CTRL_SESS_NUMBER:
736                 return(ctx->sessions->num_items);
737         case SSL_CTRL_SESS_CONNECT:
738                 return(ctx->stats.sess_connect);
739         case SSL_CTRL_SESS_CONNECT_GOOD:
740                 return(ctx->stats.sess_connect_good);
741         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
742                 return(ctx->stats.sess_connect_renegotiate);
743         case SSL_CTRL_SESS_ACCEPT:
744                 return(ctx->stats.sess_accept);
745         case SSL_CTRL_SESS_ACCEPT_GOOD:
746                 return(ctx->stats.sess_accept_good);
747         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
748                 return(ctx->stats.sess_accept_renegotiate);
749         case SSL_CTRL_SESS_HIT:
750                 return(ctx->stats.sess_hit);
751         case SSL_CTRL_SESS_CB_HIT:
752                 return(ctx->stats.sess_cb_hit);
753         case SSL_CTRL_SESS_MISSES:
754                 return(ctx->stats.sess_miss);
755         case SSL_CTRL_SESS_TIMEOUTS:
756                 return(ctx->stats.sess_timeout);
757         case SSL_CTRL_SESS_CACHE_FULL:
758                 return(ctx->stats.sess_cache_full);
759         case SSL_CTRL_OPTIONS:
760                 return(ctx->options|=larg);
761         case SSL_CTRL_MODE:
762                 return(ctx->mode|=larg);
763         default:
764                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
765                 }
766         }
767
768 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
769         {
770         long l;
771
772         l=a->id-b->id;
773         if (l == 0L)
774                 return(0);
775         else
776                 return((l > 0)?1:-1);
777         }
778
779 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
780         {
781         long l;
782
783         l=(*ap)->id-(*bp)->id;
784         if (l == 0L)
785                 return(0);
786         else
787                 return((l > 0)?1:-1);
788         }
789
790 /** return a STACK of the ciphers available for the SSL and in order of
791  * preference */
792 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
793         {
794         if ((s != NULL) && (s->cipher_list != NULL))
795                 {
796                 return(s->cipher_list);
797                 }
798         else if ((s->ctx != NULL) &&
799                 (s->ctx->cipher_list != NULL))
800                 {
801                 return(s->ctx->cipher_list);
802                 }
803         return(NULL);
804         }
805
806 /** return a STACK of the ciphers available for the SSL and in order of
807  * algorithm id */
808 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
809         {
810         if ((s != NULL) && (s->cipher_list_by_id != NULL))
811                 {
812                 return(s->cipher_list_by_id);
813                 }
814         else if ((s != NULL) && (s->ctx != NULL) &&
815                 (s->ctx->cipher_list_by_id != NULL))
816                 {
817                 return(s->ctx->cipher_list_by_id);
818                 }
819         return(NULL);
820         }
821
822 /** The old interface to get the same thing as SSL_get_ciphers() */
823 const char *SSL_get_cipher_list(SSL *s,int n)
824         {
825         SSL_CIPHER *c;
826         STACK_OF(SSL_CIPHER) *sk;
827
828         if (s == NULL) return(NULL);
829         sk=SSL_get_ciphers(s);
830         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
831                 return(NULL);
832         c=sk_SSL_CIPHER_value(sk,n);
833         if (c == NULL) return(NULL);
834         return(c->name);
835         }
836
837 /** specify the ciphers to be used by defaut by the SSL_CTX */
838 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
839         {
840         STACK_OF(SSL_CIPHER) *sk;
841         
842         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
843                 &ctx->cipher_list_by_id,str);
844 /* XXXX */
845         return((sk == NULL)?0:1);
846         }
847
848 /** specify the ciphers to be used by the SSL */
849 int SSL_set_cipher_list(SSL *s,char *str)
850         {
851         STACK_OF(SSL_CIPHER) *sk;
852         
853         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
854                 &s->cipher_list_by_id,str);
855 /* XXXX */
856         return((sk == NULL)?0:1);
857         }
858
859 /* works well for SSLv2, not so good for SSLv3 */
860 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
861         {
862         char *p;
863         const char *cp;
864         STACK_OF(SSL_CIPHER) *sk;
865         SSL_CIPHER *c;
866         int i;
867
868         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
869                 (len < 2))
870                 return(NULL);
871
872         p=buf;
873         sk=s->session->ciphers;
874         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
875                 {
876                 /* Decrement for either the ':' or a '\0' */
877                 len--;
878                 c=sk_SSL_CIPHER_value(sk,i);
879                 for (cp=c->name; *cp; )
880                         {
881                         if (len-- == 0)
882                                 {
883                                 *p='\0';
884                                 return(buf);
885                                 }
886                         else
887                                 *(p++)= *(cp++);
888                         }
889                 *(p++)=':';
890                 }
891         p[-1]='\0';
892         return(buf);
893         }
894
895 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
896         {
897         int i,j=0;
898         SSL_CIPHER *c;
899         unsigned char *q;
900
901         if (sk == NULL) return(0);
902         q=p;
903
904         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
905                 {
906                 c=sk_SSL_CIPHER_value(sk,i);
907                 j=ssl_put_cipher_by_char(s,c,p);
908                 p+=j;
909                 }
910         return(p-q);
911         }
912
913 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
914                                                STACK_OF(SSL_CIPHER) **skp)
915         {
916         SSL_CIPHER *c;
917         STACK_OF(SSL_CIPHER) *sk;
918         int i,n;
919
920         n=ssl_put_cipher_by_char(s,NULL,NULL);
921         if ((num%n) != 0)
922                 {
923                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
924                 return(NULL);
925                 }
926         if ((skp == NULL) || (*skp == NULL))
927                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
928         else
929                 {
930                 sk= *skp;
931                 sk_SSL_CIPHER_zero(sk);
932                 }
933
934         for (i=0; i<num; i+=n)
935                 {
936                 c=ssl_get_cipher_by_char(s,p);
937                 p+=n;
938                 if (c != NULL)
939                         {
940                         if (!sk_SSL_CIPHER_push(sk,c))
941                                 {
942                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
943                                 goto err;
944                                 }
945                         }
946                 }
947
948         if (skp != NULL)
949                 *skp=sk;
950         return(sk);
951 err:
952         if ((skp == NULL) || (*skp == NULL))
953                 sk_SSL_CIPHER_free(sk);
954         return(NULL);
955         }
956
957 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
958         {
959         unsigned long l;
960
961         l=(unsigned long)
962                 ((unsigned int) a->session_id[0]     )|
963                 ((unsigned int) a->session_id[1]<< 8L)|
964                 ((unsigned long)a->session_id[2]<<16L)|
965                 ((unsigned long)a->session_id[3]<<24L);
966         return(l);
967         }
968
969 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
970         {
971         if (a->ssl_version != b->ssl_version)
972                 return(1);
973         if (a->session_id_length != b->session_id_length)
974                 return(1);
975         return(memcmp(a->session_id,b->session_id,a->session_id_length));
976         }
977
978 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
979         {
980         SSL_CTX *ret=NULL;
981         
982         if (meth == NULL)
983                 {
984                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
985                 return(NULL);
986                 }
987
988         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
989                 {
990                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
991                 goto err;
992                 }
993         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
994         if (ret == NULL)
995                 goto err;
996
997         memset(ret,0,sizeof(SSL_CTX));
998
999         ret->method=meth;
1000
1001         ret->cert_store=NULL;
1002         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
1003         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
1004         ret->session_cache_head=NULL;
1005         ret->session_cache_tail=NULL;
1006
1007         /* We take the system default */
1008         ret->session_timeout=meth->get_timeout();
1009
1010         ret->new_session_cb=NULL;
1011         ret->remove_session_cb=NULL;
1012         ret->get_session_cb=NULL;
1013
1014         memset((char *)&ret->stats,0,sizeof(ret->stats));
1015
1016         ret->references=1;
1017         ret->quiet_shutdown=0;
1018
1019 /*      ret->cipher=NULL;*/
1020 /*      ret->s2->challenge=NULL;
1021         ret->master_key=NULL;
1022         ret->key_arg=NULL;
1023         ret->s2->conn_id=NULL; */
1024
1025         ret->info_callback=NULL;
1026
1027         ret->app_verify_callback=NULL;
1028         ret->app_verify_arg=NULL;
1029
1030         ret->read_ahead=0;
1031         ret->verify_mode=SSL_VERIFY_NONE;
1032         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1033         ret->default_verify_callback=NULL;
1034         if ((ret->cert=ssl_cert_new()) == NULL)
1035                 goto err;
1036
1037         ret->default_passwd_callback=NULL;
1038         ret->default_passwd_callback_userdata=NULL;
1039         ret->client_cert_cb=NULL;
1040
1041         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
1042         if (ret->sessions == NULL) goto err;
1043         ret->cert_store=X509_STORE_new();
1044         if (ret->cert_store == NULL) goto err;
1045
1046         ssl_create_cipher_list(ret->method,
1047                 &ret->cipher_list,&ret->cipher_list_by_id,
1048                 SSL_DEFAULT_CIPHER_LIST);
1049         if (ret->cipher_list == NULL
1050             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1051                 {
1052                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1053                 goto err2;
1054                 }
1055
1056         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1057                 {
1058                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1059                 goto err2;
1060                 }
1061         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1062                 {
1063                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1064                 goto err2;
1065                 }
1066         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1067                 {
1068                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1069                 goto err2;
1070                 }
1071
1072         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1073                 goto err;
1074
1075         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1076
1077         ret->extra_certs=NULL;
1078         ret->comp_methods=SSL_COMP_get_compression_methods();
1079
1080         return(ret);
1081 err:
1082         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1083 err2:
1084         if (ret != NULL) SSL_CTX_free(ret);
1085         return(NULL);
1086         }
1087
1088 static void SSL_COMP_free(SSL_COMP *comp)
1089     { Free(comp); }
1090
1091 void SSL_CTX_free(SSL_CTX *a)
1092         {
1093         int i;
1094
1095         if (a == NULL) return;
1096
1097         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1098 #ifdef REF_PRINT
1099         REF_PRINT("SSL_CTX",a);
1100 #endif
1101         if (i > 0) return;
1102 #ifdef REF_CHECK
1103         if (i < 0)
1104                 {
1105                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1106                 abort(); /* ok */
1107                 }
1108 #endif
1109         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1110
1111         if (a->sessions != NULL)
1112                 {
1113                 SSL_CTX_flush_sessions(a,0);
1114                 lh_free(a->sessions);
1115                 }
1116         if (a->cert_store != NULL)
1117                 X509_STORE_free(a->cert_store);
1118         if (a->cipher_list != NULL)
1119                 sk_SSL_CIPHER_free(a->cipher_list);
1120         if (a->cipher_list_by_id != NULL)
1121                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1122         if (a->cert != NULL)
1123                 ssl_cert_free(a->cert);
1124         if (a->client_CA != NULL)
1125                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1126         if (a->extra_certs != NULL)
1127                 sk_X509_pop_free(a->extra_certs,X509_free);
1128         if (a->comp_methods != NULL)
1129                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1130         Free((char *)a);
1131         }
1132
1133 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1134         {
1135         ctx->default_passwd_callback=cb;
1136         }
1137
1138 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
1139         {
1140         ctx->default_passwd_callback_userdata=u;
1141         }
1142
1143 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1144         {
1145         /* now
1146          *     int (*cb)(X509_STORE_CTX *),
1147          * but should be
1148          *     int (*cb)(X509_STORE_CTX *, void *arg)
1149          */
1150         ctx->app_verify_callback=cb;
1151         ctx->app_verify_arg=arg; /* never used */
1152         }
1153
1154 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1155         {
1156         ctx->verify_mode=mode;
1157         ctx->default_verify_callback=cb;
1158         /* This needs cleaning up EAY EAY EAY */
1159         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1160         }
1161
1162 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1163         {
1164         ctx->verify_depth=depth;
1165         }
1166
1167 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1168         {
1169         CERT_PKEY *cpk;
1170         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1171         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1172         int rsa_tmp_export,dh_tmp_export,kl;
1173         unsigned long mask,emask;
1174
1175         if (c == NULL) return;
1176
1177         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1178
1179 #ifndef NO_RSA
1180         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1181         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1182                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1183 #else
1184         rsa_tmp=rsa_tmp_export=0;
1185 #endif
1186 #ifndef NO_DH
1187         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1188         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1189                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1190 #else
1191         dh_tmp=dh_tmp_export=0;
1192 #endif
1193
1194         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1195         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1196         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1197         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1198         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1199         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1200         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1201         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1202         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1203         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1204         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1205 /* FIX THIS EAY EAY EAY */
1206         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1207         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1208
1209         mask=0;
1210         emask=0;
1211
1212 #ifdef CIPHER_DEBUG
1213         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1214                 rsa_tmp,rsa_tmp_export,dh_tmp,
1215                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1216 #endif
1217
1218         if (rsa_enc || (rsa_tmp && rsa_sign))
1219                 mask|=SSL_kRSA;
1220         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1221                 emask|=SSL_kRSA;
1222
1223 #if 0
1224         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1225         if (    (dh_tmp || dh_rsa || dh_dsa) && 
1226                 (rsa_enc || rsa_sign || dsa_sign))
1227                 mask|=SSL_kEDH;
1228         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1229                 (rsa_enc || rsa_sign || dsa_sign))
1230                 emask|=SSL_kEDH;
1231 #endif
1232
1233         if (dh_tmp_export) 
1234                 emask|=SSL_kEDH;
1235
1236         if (dh_tmp)
1237                 mask|=SSL_kEDH;
1238
1239         if (dh_rsa) mask|=SSL_kDHr;
1240         if (dh_rsa_export) emask|=SSL_kDHr;
1241
1242         if (dh_dsa) mask|=SSL_kDHd;
1243         if (dh_dsa_export) emask|=SSL_kDHd;
1244
1245         if (rsa_enc || rsa_sign)
1246                 {
1247                 mask|=SSL_aRSA;
1248                 emask|=SSL_aRSA;
1249                 }
1250
1251         if (dsa_sign)
1252                 {
1253                 mask|=SSL_aDSS;
1254                 emask|=SSL_aDSS;
1255                 }
1256
1257 #ifdef SSL_ALLOW_ADH
1258         mask|=SSL_aNULL;
1259         emask|=SSL_aNULL;
1260 #endif
1261
1262         c->mask=mask;
1263         c->export_mask=emask;
1264         c->valid=1;
1265         }
1266
1267 /* THIS NEEDS CLEANING UP */
1268 X509 *ssl_get_server_send_cert(SSL *s)
1269         {
1270         unsigned long alg,mask,kalg;
1271         CERT *c;
1272         int i,is_export;
1273
1274         c=s->cert;
1275         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1276         alg=s->s3->tmp.new_cipher->algorithms;
1277         is_export=SSL_IS_EXPORT(alg);
1278         mask=is_export?c->export_mask:c->mask;
1279         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1280
1281         if      (kalg & SSL_kDHr)
1282                 i=SSL_PKEY_DH_RSA;
1283         else if (kalg & SSL_kDHd)
1284                 i=SSL_PKEY_DH_DSA;
1285         else if (kalg & SSL_aDSS)
1286                 i=SSL_PKEY_DSA_SIGN;
1287         else if (kalg & SSL_aRSA)
1288                 {
1289                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1290                         i=SSL_PKEY_RSA_SIGN;
1291                 else
1292                         i=SSL_PKEY_RSA_ENC;
1293                 }
1294         else /* if (kalg & SSL_aNULL) */
1295                 {
1296                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1297                 return(NULL);
1298                 }
1299         if (c->pkeys[i].x509 == NULL) return(NULL);
1300         return(c->pkeys[i].x509);
1301         }
1302
1303 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1304         {
1305         unsigned long alg;
1306         CERT *c;
1307
1308         alg=cipher->algorithms;
1309         c=s->cert;
1310
1311         if ((alg & SSL_aDSS) &&
1312                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1313                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1314         else if (alg & SSL_aRSA)
1315                 {
1316                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1317                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1318                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1319                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1320                 else
1321                         return(NULL);
1322                 }
1323         else /* if (alg & SSL_aNULL) */
1324                 {
1325                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1326                 return(NULL);
1327                 }
1328         }
1329
1330 void ssl_update_cache(SSL *s,int mode)
1331         {
1332         int i;
1333
1334         /* If the session_id_length is 0, we are not supposed to cache it,
1335          * and it would be rather hard to do anyway :-) */
1336         if (s->session->session_id_length == 0) return;
1337
1338         if ((s->ctx->session_cache_mode & mode)
1339                 && (!s->hit)
1340                 && SSL_CTX_add_session(s->ctx,s->session)
1341                 && (s->ctx->new_session_cb != NULL))
1342                 {
1343                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1344                 if (!s->ctx->new_session_cb(s,s->session))
1345                         SSL_SESSION_free(s->session);
1346                 }
1347
1348         /* auto flush every 255 connections */
1349         i=s->ctx->session_cache_mode;
1350         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1351                 ((i & mode) == mode))
1352                 {
1353                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1354                         ?s->ctx->stats.sess_connect_good
1355                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1356                         {
1357                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1358                         }
1359                 }
1360         }
1361
1362 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1363         {
1364         return(s->method);
1365         }
1366
1367 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1368         {
1369         int conn= -1;
1370         int ret=1;
1371
1372         if (s->method != meth)
1373                 {
1374                 if (s->handshake_func != NULL)
1375                         conn=(s->handshake_func == s->method->ssl_connect);
1376
1377                 if (s->method->version == meth->version)
1378                         s->method=meth;
1379                 else
1380                         {
1381                         s->method->ssl_free(s);
1382                         s->method=meth;
1383                         ret=s->method->ssl_new(s);
1384                         }
1385
1386                 if (conn == 1)
1387                         s->handshake_func=meth->ssl_connect;
1388                 else if (conn == 0)
1389                         s->handshake_func=meth->ssl_accept;
1390                 }
1391         return(ret);
1392         }
1393
1394 int SSL_get_error(SSL *s,int i)
1395         {
1396         int reason;
1397         unsigned long l;
1398         BIO *bio;
1399
1400         if (i > 0) return(SSL_ERROR_NONE);
1401
1402         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1403          * etc, where we do encode the error */
1404         if ((l=ERR_peek_error()) != 0)
1405                 {
1406                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1407                         return(SSL_ERROR_SYSCALL);
1408                 else
1409                         return(SSL_ERROR_SSL);
1410                 }
1411
1412         if ((i < 0) && SSL_want_read(s))
1413                 {
1414                 bio=SSL_get_rbio(s);
1415                 if (BIO_should_read(bio))
1416                         return(SSL_ERROR_WANT_READ);
1417                 else if (BIO_should_write(bio))
1418                         /* This one doesn't make too much sense ... We never try
1419                          * to write to the rbio, and an application program where
1420                          * rbio and wbio are separate couldn't even know what it
1421                          * should wait for.
1422                          * However if we ever set s->rwstate incorrectly
1423                          * (so that we have SSL_want_read(s) instead of
1424                          * SSL_want_write(s)) and rbio and wbio *are* the same,
1425                          * this test works around that bug; so it might be safer
1426                          * to keep it. */
1427                         return(SSL_ERROR_WANT_WRITE);
1428                 else if (BIO_should_io_special(bio))
1429                         {
1430                         reason=BIO_get_retry_reason(bio);
1431                         if (reason == BIO_RR_CONNECT)
1432                                 return(SSL_ERROR_WANT_CONNECT);
1433                         else
1434                                 return(SSL_ERROR_SYSCALL); /* unknown */
1435                         }
1436                 }
1437
1438         if ((i < 0) && SSL_want_write(s))
1439                 {
1440                 bio=SSL_get_wbio(s);
1441                 if (BIO_should_write(bio))
1442                         return(SSL_ERROR_WANT_WRITE);
1443                 else if (BIO_should_read(bio))
1444                         /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
1445                         return(SSL_ERROR_WANT_READ);
1446                 else if (BIO_should_io_special(bio))
1447                         {
1448                         reason=BIO_get_retry_reason(bio);
1449                         if (reason == BIO_RR_CONNECT)
1450                                 return(SSL_ERROR_WANT_CONNECT);
1451                         else
1452                                 return(SSL_ERROR_SYSCALL);
1453                         }
1454                 }
1455         if ((i < 0) && SSL_want_x509_lookup(s))
1456                 {
1457                 return(SSL_ERROR_WANT_X509_LOOKUP);
1458                 }
1459
1460         if (i == 0)
1461                 {
1462                 if (s->version == SSL2_VERSION)
1463                         {
1464                         /* assume it is the socket being closed */
1465                         return(SSL_ERROR_ZERO_RETURN);
1466                         }
1467                 else
1468                         {
1469                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1470                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1471                                 return(SSL_ERROR_ZERO_RETURN);
1472                         }
1473                 }
1474         return(SSL_ERROR_SYSCALL);
1475         }
1476
1477 int SSL_do_handshake(SSL *s)
1478         {
1479         int ret=1;
1480
1481         if (s->handshake_func == NULL)
1482                 {
1483                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1484                 return(-1);
1485                 }
1486
1487         s->method->ssl_renegotiate_check(s);
1488
1489         if (SSL_in_init(s) || SSL_in_before(s))
1490                 {
1491                 ret=s->handshake_func(s);
1492                 }
1493         return(ret);
1494         }
1495
1496 /* For the next 2 functions, SSL_clear() sets shutdown and so
1497  * one of these calls will reset it */
1498 void SSL_set_accept_state(SSL *s)
1499         {
1500         s->server=1;
1501         s->shutdown=0;
1502         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1503         s->handshake_func=s->method->ssl_accept;
1504         /* clear the current cipher */
1505         ssl_clear_cipher_ctx(s);
1506         }
1507
1508 void SSL_set_connect_state(SSL *s)
1509         {
1510         s->server=0;
1511         s->shutdown=0;
1512         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1513         s->handshake_func=s->method->ssl_connect;
1514         /* clear the current cipher */
1515         ssl_clear_cipher_ctx(s);
1516         }
1517
1518 int ssl_undefined_function(SSL *s)
1519         {
1520         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1521         return(0);
1522         }
1523
1524 SSL_METHOD *ssl_bad_method(int ver)
1525         {
1526         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1527         return(NULL);
1528         }
1529
1530 char *SSL_get_version(SSL *s)
1531         {
1532         if (s->version == TLS1_VERSION)
1533                 return("TLSv1");
1534         else if (s->version == SSL3_VERSION)
1535                 return("SSLv3");
1536         else if (s->version == SSL2_VERSION)
1537                 return("SSLv2");
1538         else
1539                 return("unknown");
1540         }
1541
1542 SSL *SSL_dup(SSL *s)
1543         {
1544         STACK_OF(X509_NAME) *sk;
1545         X509_NAME *xn;
1546         SSL *ret;
1547         int i;
1548                  
1549         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1550             return(NULL);
1551                           
1552         if (s->session != NULL)
1553                 {
1554                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1555                 SSL_copy_session_id(ret,s);
1556                 }
1557         else
1558                 {
1559                 /* No session has been established yet, so we have to expect
1560                  * that s->cert or ret->cert will be changed later --
1561                  * they should not both point to the same object,
1562                  * and thus we can't use SSL_copy_session_id. */
1563
1564                 ret->method = s->method;
1565                 ret->method->ssl_new(ret);
1566
1567                 if (s->cert != NULL)
1568                         {
1569                         ret->cert = ssl_cert_dup(s->cert);
1570                         if (ret->cert == NULL)
1571                                 goto err;
1572                         }
1573                                 
1574                 SSL_set_session_id_context(ret,
1575                         s->sid_ctx, s->sid_ctx_length);
1576                 }
1577
1578         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1579         SSL_set_verify(ret,SSL_get_verify_mode(s),
1580                 SSL_get_verify_callback(s));
1581         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1582
1583         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1584         
1585         ret->debug=s->debug;
1586         ret->options=s->options;
1587
1588         /* copy app data, a little dangerous perhaps */
1589         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1590                 goto err;
1591
1592         /* setup rbio, and wbio */
1593         if (s->rbio != NULL)
1594                 {
1595                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1596                         goto err;
1597                 }
1598         if (s->wbio != NULL)
1599                 {
1600                 if (s->wbio != s->rbio)
1601                         {
1602                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1603                                 goto err;
1604                         }
1605                 else
1606                         ret->wbio=ret->rbio;
1607                 }
1608
1609         /* dup the cipher_list and cipher_list_by_id stacks */
1610         if (s->cipher_list != NULL)
1611                 {
1612                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1613                         goto err;
1614                 }
1615         if (s->cipher_list_by_id != NULL)
1616                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1617                         == NULL)
1618                         goto err;
1619
1620         /* Dup the client_CA list */
1621         if (s->client_CA != NULL)
1622                 {
1623                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1624                 ret->client_CA=sk;
1625                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1626                         {
1627                         xn=sk_X509_NAME_value(sk,i);
1628                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1629                                 {
1630                                 X509_NAME_free(xn);
1631                                 goto err;
1632                                 }
1633                         }
1634                 }
1635
1636         ret->shutdown=s->shutdown;
1637         ret->state=s->state;
1638         ret->handshake_func=s->handshake_func;
1639         ret->server=s->server;
1640
1641         if (0)
1642                 {
1643 err:
1644                 if (ret != NULL) SSL_free(ret);
1645                 ret=NULL;
1646                 }
1647         return(ret);
1648         }
1649
1650 void ssl_clear_cipher_ctx(SSL *s)
1651         {
1652         if (s->enc_read_ctx != NULL)
1653                 {
1654                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1655                 Free(s->enc_read_ctx);
1656                 s->enc_read_ctx=NULL;
1657                 }
1658         if (s->enc_write_ctx != NULL)
1659                 {
1660                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1661                 Free(s->enc_write_ctx);
1662                 s->enc_write_ctx=NULL;
1663                 }
1664         if (s->expand != NULL)
1665                 {
1666                 COMP_CTX_free(s->expand);
1667                 s->expand=NULL;
1668                 }
1669         if (s->compress != NULL)
1670                 {
1671                 COMP_CTX_free(s->compress);
1672                 s->compress=NULL;
1673                 }
1674         }
1675
1676 /* Fix this function so that it takes an optional type parameter */
1677 X509 *SSL_get_certificate(SSL *s)
1678         {
1679         if (s->cert != NULL)
1680                 return(s->cert->key->x509);
1681         else
1682                 return(NULL);
1683         }
1684
1685 /* Fix this function so that it takes an optional type parameter */
1686 EVP_PKEY *SSL_get_privatekey(SSL *s)
1687         {
1688         if (s->cert != NULL)
1689                 return(s->cert->key->privatekey);
1690         else
1691                 return(NULL);
1692         }
1693
1694 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1695         {
1696         if ((s->session != NULL) && (s->session->cipher != NULL))
1697                 return(s->session->cipher);
1698         return(NULL);
1699         }
1700
1701 int ssl_init_wbio_buffer(SSL *s,int push)
1702         {
1703         BIO *bbio;
1704
1705         if (s->bbio == NULL)
1706                 {
1707                 bbio=BIO_new(BIO_f_buffer());
1708                 if (bbio == NULL) return(0);
1709                 s->bbio=bbio;
1710                 }
1711         else
1712                 {
1713                 bbio=s->bbio;
1714                 if (s->bbio == s->wbio)
1715                         s->wbio=BIO_pop(s->wbio);
1716                 }
1717         (void)BIO_reset(bbio);
1718 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1719         if (!BIO_set_read_buffer_size(bbio,1))
1720                 {
1721                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1722                 return(0);
1723                 }
1724         if (push)
1725                 {
1726                 if (s->wbio != bbio)
1727                         s->wbio=BIO_push(bbio,s->wbio);
1728                 }
1729         else
1730                 {
1731                 if (s->wbio == bbio)
1732                         s->wbio=BIO_pop(bbio);
1733                 }
1734         return(1);
1735         }
1736
1737 void ssl_free_wbio_buffer(SSL *s)
1738         {
1739         BIO *under;
1740
1741         if (s->bbio == NULL) return;
1742
1743         if (s->bbio == s->wbio)
1744                 {
1745                 /* remove buffering */
1746                 under=BIO_pop(s->wbio);
1747                 if (under != NULL)
1748                         s->wbio=under;
1749                 else
1750                         abort(); /* ok */
1751                 }
1752         BIO_free(s->bbio);
1753         s->bbio=NULL;
1754         }
1755         
1756 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1757         {
1758         ctx->quiet_shutdown=mode;
1759         }
1760
1761 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1762         {
1763         return(ctx->quiet_shutdown);
1764         }
1765
1766 void SSL_set_quiet_shutdown(SSL *s,int mode)
1767         {
1768         s->quiet_shutdown=mode;
1769         }
1770
1771 int SSL_get_quiet_shutdown(SSL *s)
1772         {
1773         return(s->quiet_shutdown);
1774         }
1775
1776 void SSL_set_shutdown(SSL *s,int mode)
1777         {
1778         s->shutdown=mode;
1779         }
1780
1781 int SSL_get_shutdown(SSL *s)
1782         {
1783         return(s->shutdown);
1784         }
1785
1786 int SSL_version(SSL *s)
1787         {
1788         return(s->version);
1789         }
1790
1791 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1792         {
1793         return(ssl->ctx);
1794         }
1795
1796 #ifndef NO_STDIO
1797 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1798         {
1799         return(X509_STORE_set_default_paths(ctx->cert_store));
1800         }
1801
1802 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1803                 const char *CApath)
1804         {
1805         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1806         }
1807 #endif
1808
1809 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1810         {
1811         ssl->info_callback=cb;
1812         }
1813
1814 void (*SSL_get_info_callback(SSL *ssl))(void)
1815         {
1816         return((void (*)())ssl->info_callback);
1817         }
1818
1819 int SSL_state(SSL *ssl)
1820         {
1821         return(ssl->state);
1822         }
1823
1824 void SSL_set_verify_result(SSL *ssl,long arg)
1825         {
1826         ssl->verify_result=arg;
1827         }
1828
1829 long SSL_get_verify_result(SSL *ssl)
1830         {
1831         return(ssl->verify_result);
1832         }
1833
1834 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1835                          int (*dup_func)(),void (*free_func)())
1836         {
1837         ssl_meth_num++;
1838         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1839                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1840         }
1841
1842 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1843         {
1844         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1845         }
1846
1847 void *SSL_get_ex_data(SSL *s,int idx)
1848         {
1849         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1850         }
1851
1852 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1853                              int (*dup_func)(),void (*free_func)())
1854         {
1855         ssl_ctx_meth_num++;
1856         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1857                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1858         }
1859
1860 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1861         {
1862         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1863         }
1864
1865 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1866         {
1867         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1868         }
1869
1870 int ssl_ok(SSL *s)
1871         {
1872         return(1);
1873         }
1874
1875 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1876         {
1877         return(ctx->cert_store);
1878         }
1879
1880 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1881         {
1882         if (ctx->cert_store != NULL)
1883                 X509_STORE_free(ctx->cert_store);
1884         ctx->cert_store=store;
1885         }
1886
1887 int SSL_want(SSL *s)
1888         {
1889         return(s->rwstate);
1890         }
1891
1892 /*!
1893  * \brief Set the callback for generating temporary RSA keys.
1894  * \param ctx the SSL context.
1895  * \param cb the callback
1896  */
1897
1898 #ifndef NO_RSA
1899 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
1900                                                           int is_export,
1901                                                           int keylength))
1902     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1903 #endif
1904
1905 #ifndef NO_RSA
1906 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int is_export,
1907                                                           int keylength))
1908     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1909 #endif
1910
1911 #ifdef DOXYGEN
1912 /*!
1913  * \brief The RSA temporary key callback function.
1914  * \param ssl the SSL session.
1915  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
1916  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
1917  * of the required key in bits.
1918  * \return the temporary RSA key.
1919  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1920  */
1921
1922 RSA *cb(SSL *ssl,int is_export,int keylength)
1923     {}
1924 #endif
1925
1926 /*!
1927  * \brief Set the callback for generating temporary DH keys.
1928  * \param ctx the SSL context.
1929  * \param dh the callback
1930  */
1931
1932 #ifndef NO_DH
1933 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
1934                                                         int keylength))
1935     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1936
1937 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
1938                                                         int keylength))
1939     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1940 #endif
1941
1942 #if defined(_WINDLL) && defined(WIN16)
1943 #include "../crypto/bio/bss_file.c"
1944 #endif
1945
1946 IMPLEMENT_STACK_OF(SSL_CIPHER)
1947 IMPLEMENT_STACK_OF(SSL_COMP)