Add new function X509_STORE_set_verify_cb and use it in apps
[openssl.git] / crypto / x509 / x509_lu.c
1 /* crypto/x509/x509_lu.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/lhash.h>
62 #include <openssl/x509.h>
63 #include <openssl/x509v3.h>
64
65 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
66         {
67         X509_LOOKUP *ret;
68
69         ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
70         if (ret == NULL) return NULL;
71
72         ret->init=0;
73         ret->skip=0;
74         ret->method=method;
75         ret->method_data=NULL;
76         ret->store_ctx=NULL;
77         if ((method->new_item != NULL) && !method->new_item(ret))
78                 {
79                 OPENSSL_free(ret);
80                 return NULL;
81                 }
82         return ret;
83         }
84
85 void X509_LOOKUP_free(X509_LOOKUP *ctx)
86         {
87         if (ctx == NULL) return;
88         if (    (ctx->method != NULL) &&
89                 (ctx->method->free != NULL))
90                 ctx->method->free(ctx);
91         OPENSSL_free(ctx);
92         }
93
94 int X509_LOOKUP_init(X509_LOOKUP *ctx)
95         {
96         if (ctx->method == NULL) return 0;
97         if (ctx->method->init != NULL)
98                 return ctx->method->init(ctx);
99         else
100                 return 1;
101         }
102
103 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
104         {
105         if (ctx->method == NULL) return 0;
106         if (ctx->method->shutdown != NULL)
107                 return ctx->method->shutdown(ctx);
108         else
109                 return 1;
110         }
111
112 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
113              char **ret)
114         {
115         if (ctx->method == NULL) return -1;
116         if (ctx->method->ctrl != NULL)
117                 return ctx->method->ctrl(ctx,cmd,argc,argl,ret);
118         else
119                 return 1;
120         }
121
122 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
123              X509_OBJECT *ret)
124         {
125         if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
126                 return X509_LU_FAIL;
127         if (ctx->skip) return 0;
128         return ctx->method->get_by_subject(ctx,type,name,ret);
129         }
130
131 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
132              ASN1_INTEGER *serial, X509_OBJECT *ret)
133         {
134         if ((ctx->method == NULL) ||
135                 (ctx->method->get_by_issuer_serial == NULL))
136                 return X509_LU_FAIL;
137         return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);
138         }
139
140 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
141              unsigned char *bytes, int len, X509_OBJECT *ret)
142         {
143         if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
144                 return X509_LU_FAIL;
145         return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);
146         }
147
148 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
149              X509_OBJECT *ret)
150         {
151         if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
152                 return X509_LU_FAIL;
153         return ctx->method->get_by_alias(ctx,type,str,len,ret);
154         }
155
156   
157 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
158         {
159         int ret;
160
161         ret=((*a)->type - (*b)->type);
162         if (ret) return ret;
163         switch ((*a)->type)
164                 {
165         case X509_LU_X509:
166                 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);
167                 break;
168         case X509_LU_CRL:
169                 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);
170                 break;
171         default:
172                 /* abort(); */
173                 return 0;
174                 }
175         return ret;
176         }
177
178 X509_STORE *X509_STORE_new(void)
179         {
180         X509_STORE *ret;
181
182         if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
183                 return NULL;
184         ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
185         ret->cache=1;
186         ret->get_cert_methods=sk_X509_LOOKUP_new_null();
187         ret->verify=0;
188         ret->verify_cb=0;
189
190         if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
191                 return NULL;
192
193         ret->get_issuer = 0;
194         ret->check_issued = 0;
195         ret->check_revocation = 0;
196         ret->get_crl = 0;
197         ret->check_crl = 0;
198         ret->cert_crl = 0;
199         ret->lookup_certs = 0;
200         ret->lookup_crls = 0;
201         ret->cleanup = 0;
202
203         CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data);
204         ret->references=1;
205         return ret;
206         }
207
208 static void cleanup(X509_OBJECT *a)
209         {
210         if (a->type == X509_LU_X509)
211                 {
212                 X509_free(a->data.x509);
213                 }
214         else if (a->type == X509_LU_CRL)
215                 {
216                 X509_CRL_free(a->data.crl);
217                 }
218         else
219                 {
220                 /* abort(); */
221                 }
222
223         OPENSSL_free(a);
224         }
225
226 void X509_STORE_free(X509_STORE *vfy)
227         {
228         int i;
229         STACK_OF(X509_LOOKUP) *sk;
230         X509_LOOKUP *lu;
231
232         if (vfy == NULL)
233             return;
234
235         sk=vfy->get_cert_methods;
236         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
237                 {
238                 lu=sk_X509_LOOKUP_value(sk,i);
239                 X509_LOOKUP_shutdown(lu);
240                 X509_LOOKUP_free(lu);
241                 }
242         sk_X509_LOOKUP_free(sk);
243         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
244
245         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
246         if (vfy->param)
247                 X509_VERIFY_PARAM_free(vfy->param);
248         OPENSSL_free(vfy);
249         }
250
251 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
252         {
253         int i;
254         STACK_OF(X509_LOOKUP) *sk;
255         X509_LOOKUP *lu;
256
257         sk=v->get_cert_methods;
258         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
259                 {
260                 lu=sk_X509_LOOKUP_value(sk,i);
261                 if (m == lu->method)
262                         {
263                         return lu;
264                         }
265                 }
266         /* a new one */
267         lu=X509_LOOKUP_new(m);
268         if (lu == NULL)
269                 return NULL;
270         else
271                 {
272                 lu->store_ctx=v;
273                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
274                         return lu;
275                 else
276                         {
277                         X509_LOOKUP_free(lu);
278                         return NULL;
279                         }
280                 }
281         }
282
283 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
284              X509_OBJECT *ret)
285         {
286         X509_STORE *ctx=vs->ctx;
287         X509_LOOKUP *lu;
288         X509_OBJECT stmp,*tmp;
289         int i,j;
290
291         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
292
293         if (tmp == NULL || type == X509_LU_CRL)
294                 {
295                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
296                         {
297                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
298                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
299                         if (j < 0)
300                                 {
301                                 vs->current_method=j;
302                                 return j;
303                                 }
304                         else if (j)
305                                 {
306                                 tmp= &stmp;
307                                 break;
308                                 }
309                         }
310                 vs->current_method=0;
311                 if (tmp == NULL)
312                         return 0;
313                 }
314
315 /*      if (ret->data.ptr != NULL)
316                 X509_OBJECT_free_contents(ret); */
317
318         ret->type=tmp->type;
319         ret->data.ptr=tmp->data.ptr;
320
321         X509_OBJECT_up_ref_count(ret);
322
323         return 1;
324         }
325
326 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
327         {
328         X509_OBJECT *obj;
329         int ret=1;
330
331         if (x == NULL) return 0;
332         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
333         if (obj == NULL)
334                 {
335                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
336                 return 0;
337                 }
338         obj->type=X509_LU_X509;
339         obj->data.x509=x;
340
341         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
342
343         X509_OBJECT_up_ref_count(obj);
344
345
346         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
347                 {
348                 X509_OBJECT_free_contents(obj);
349                 OPENSSL_free(obj);
350                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
351                 ret=0;
352                 } 
353         else sk_X509_OBJECT_push(ctx->objs, obj);
354
355         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
356
357         return ret;
358         }
359
360 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
361         {
362         X509_OBJECT *obj;
363         int ret=1;
364
365         if (x == NULL) return 0;
366         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
367         if (obj == NULL)
368                 {
369                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
370                 return 0;
371                 }
372         obj->type=X509_LU_CRL;
373         obj->data.crl=x;
374
375         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
376
377         X509_OBJECT_up_ref_count(obj);
378
379         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
380                 {
381                 X509_OBJECT_free_contents(obj);
382                 OPENSSL_free(obj);
383                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
384                 ret=0;
385                 }
386         else sk_X509_OBJECT_push(ctx->objs, obj);
387
388         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
389
390         return ret;
391         }
392
393 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
394         {
395         switch (a->type)
396                 {
397         case X509_LU_X509:
398                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
399                 break;
400         case X509_LU_CRL:
401                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
402                 break;
403                 }
404         }
405
406 void X509_OBJECT_free_contents(X509_OBJECT *a)
407         {
408         switch (a->type)
409                 {
410         case X509_LU_X509:
411                 X509_free(a->data.x509);
412                 break;
413         case X509_LU_CRL:
414                 X509_CRL_free(a->data.crl);
415                 break;
416                 }
417         }
418
419 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
420              X509_NAME *name, int *pnmatch)
421         {
422         X509_OBJECT stmp;
423         X509 x509_s;
424         X509_CINF cinf_s;
425         X509_CRL crl_s;
426         X509_CRL_INFO crl_info_s;
427         int idx;
428
429         stmp.type=type;
430         switch (type)
431                 {
432         case X509_LU_X509:
433                 stmp.data.x509= &x509_s;
434                 x509_s.cert_info= &cinf_s;
435                 cinf_s.subject=name;
436                 break;
437         case X509_LU_CRL:
438                 stmp.data.crl= &crl_s;
439                 crl_s.crl= &crl_info_s;
440                 crl_info_s.issuer=name;
441                 break;
442         default:
443                 /* abort(); */
444                 return -1;
445                 }
446
447         idx = sk_X509_OBJECT_find(h,&stmp);
448         if (idx >= 0 && pnmatch)
449                 {
450                 int tidx;
451                 const X509_OBJECT *tobj, *pstmp;
452                 *pnmatch = 1;
453                 pstmp = &stmp;
454                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
455                         {
456                         tobj = sk_X509_OBJECT_value(h, tidx);
457                         if (x509_object_cmp(&tobj, &pstmp))
458                                 break;
459                         (*pnmatch)++;
460                         }
461                 }
462         return idx;
463         }
464
465
466 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
467              X509_NAME *name)
468         {
469         return x509_object_idx_cnt(h, type, name, NULL);
470         }
471
472 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
473              X509_NAME *name)
474 {
475         int idx;
476         idx = X509_OBJECT_idx_by_subject(h, type, name);
477         if (idx==-1) return NULL;
478         return sk_X509_OBJECT_value(h, idx);
479 }
480
481 STACK_OF(X509)* X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
482         {
483         int i, idx, cnt;
484         STACK_OF(X509) *sk;
485         X509 *x;
486         X509_OBJECT *obj;
487         sk = sk_X509_new_null();
488         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
489         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
490         if (idx < 0)
491                 {
492                 /* Nothing found in cache: do lookup to possibly add new
493                  * objects to cache
494                  */
495                 X509_OBJECT xobj;
496                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
497                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
498                         {
499                         sk_X509_free(sk);
500                         return NULL;
501                         }
502                 X509_OBJECT_free_contents(&xobj);
503                 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
504                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
505                 if (idx < 0)
506                         {
507                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
508                         sk_X509_free(sk);
509                         return NULL;
510                         }
511                 }
512         for (i = 0; i < cnt; i++, idx++)
513                 {
514                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
515                 x = obj->data.x509;
516                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
517                 if (!sk_X509_push(sk, x))
518                         {
519                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
520                         X509_free(x);
521                         sk_X509_pop_free(sk, X509_free);
522                         return NULL;
523                         }
524                 }
525         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
526         return sk;
527
528         }
529
530 STACK_OF(X509_CRL)* X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
531         {
532         int i, idx, cnt;
533         STACK_OF(X509_CRL) *sk;
534         X509_CRL *x;
535         X509_OBJECT *obj, xobj;
536         sk = sk_X509_CRL_new_null();
537         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
538         /* Check cache first */
539         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
540
541         /* Always do lookup to possibly add new CRLs to cache
542          */
543         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
544         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
545                 {
546                 sk_X509_CRL_free(sk);
547                 return NULL;
548                 }
549         X509_OBJECT_free_contents(&xobj);
550         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
551         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
552         if (idx < 0)
553                 {
554                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
555                 sk_X509_CRL_free(sk);
556                 return NULL;
557                 }
558
559         for (i = 0; i < cnt; i++, idx++)
560                 {
561                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
562                 x = obj->data.crl;
563                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
564                 if (!sk_X509_CRL_push(sk, x))
565                         {
566                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
567                         X509_CRL_free(x);
568                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
569                         return NULL;
570                         }
571                 }
572         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
573         return sk;
574
575         }
576
577 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
578 {
579         int idx, i;
580         X509_OBJECT *obj;
581         idx = sk_X509_OBJECT_find(h, x);
582         if (idx == -1) return NULL;
583         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
584                 return sk_X509_OBJECT_value(h, idx);
585         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
586                 {
587                 obj = sk_X509_OBJECT_value(h, i);
588                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
589                         return NULL;
590                 if (x->type == X509_LU_X509)
591                         {
592                         if (!X509_cmp(obj->data.x509, x->data.x509))
593                                 return obj;
594                         }
595                 else if (x->type == X509_LU_CRL)
596                         {
597                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
598                                 return obj;
599                         }
600                 else
601                         return obj;
602                 }
603         return NULL;
604 }
605
606
607 /* Try to get issuer certificate from store. Due to limitations
608  * of the API this can only retrieve a single certificate matching
609  * a given subject name. However it will fill the cache with all
610  * matching certificates, so we can examine the cache for all 
611  * matches.
612  *
613  * Return values are:
614  *  1 lookup successful.
615  *  0 certificate not found.
616  * -1 some other error.
617  */
618
619
620 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
621 {
622         X509_NAME *xn;
623         X509_OBJECT obj, *pobj;
624         int i, ok, idx;
625         xn=X509_get_issuer_name(x);
626         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
627         if (ok != X509_LU_X509)
628                 {
629                 if (ok == X509_LU_RETRY)
630                         {
631                         X509_OBJECT_free_contents(&obj);
632                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
633                         return -1;
634                         }
635                 else if (ok != X509_LU_FAIL)
636                         {
637                         X509_OBJECT_free_contents(&obj);
638                         /* not good :-(, break anyway */
639                         return -1;
640                         }
641                 return 0;
642                 }
643         /* If certificate matches all OK */
644         if (ctx->check_issued(ctx, x, obj.data.x509))
645                 {
646                 *issuer = obj.data.x509;
647                 return 1;
648                 }
649         X509_OBJECT_free_contents(&obj);
650         /* Else find index of first matching cert */
651         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
652         /* This shouldn't normally happen since we already have one match */
653         if (idx == -1) return 0;
654
655         /* Look through all matching certificates for a suitable issuer */
656         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
657                 {
658                 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
659                 /* See if we've ran out of matches */
660                 if (pobj->type != X509_LU_X509) return 0;
661                 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
662                 if (ctx->check_issued(ctx, x, pobj->data.x509))
663                         {
664                         *issuer = pobj->data.x509;
665                         X509_OBJECT_up_ref_count(pobj);
666                         return 1;
667                         }
668                 }
669         return 0;
670 }
671
672 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
673         {
674         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
675         }
676
677 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
678         {
679         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
680         return 1;
681         }
682
683 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
684         {
685         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
686         }
687
688 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
689         {
690         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
691         }
692
693 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
694         {
695         return X509_VERIFY_PARAM_set1(ctx->param, param);
696         }
697
698 void X509_STORE_set_verify_cb(X509_STORE *ctx,
699                                   int (*verify_cb)(int, X509_STORE_CTX *))
700         {
701         ctx->verify_cb = verify_cb;
702         }
703
704 IMPLEMENT_STACK_OF(X509_LOOKUP)
705 IMPLEMENT_STACK_OF(X509_OBJECT)