3a6e04a1deea41846f36a05dfefd361139ff40b9
[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         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
204                 {
205                 sk_X509_OBJECT_free(ret->objs);
206                 OPENSSL_free(ret);
207                 return NULL;
208                 }
209
210         ret->references=1;
211         return ret;
212         }
213
214 static void cleanup(X509_OBJECT *a)
215         {
216         if (a->type == X509_LU_X509)
217                 {
218                 X509_free(a->data.x509);
219                 }
220         else if (a->type == X509_LU_CRL)
221                 {
222                 X509_CRL_free(a->data.crl);
223                 }
224         else
225                 {
226                 /* abort(); */
227                 }
228
229         OPENSSL_free(a);
230         }
231
232 void X509_STORE_free(X509_STORE *vfy)
233         {
234         int i;
235         STACK_OF(X509_LOOKUP) *sk;
236         X509_LOOKUP *lu;
237
238         if (vfy == NULL)
239             return;
240
241         sk=vfy->get_cert_methods;
242         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
243                 {
244                 lu=sk_X509_LOOKUP_value(sk,i);
245                 X509_LOOKUP_shutdown(lu);
246                 X509_LOOKUP_free(lu);
247                 }
248         sk_X509_LOOKUP_free(sk);
249         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
250
251         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
252         if (vfy->param)
253                 X509_VERIFY_PARAM_free(vfy->param);
254         OPENSSL_free(vfy);
255         }
256
257 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
258         {
259         int i;
260         STACK_OF(X509_LOOKUP) *sk;
261         X509_LOOKUP *lu;
262
263         sk=v->get_cert_methods;
264         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
265                 {
266                 lu=sk_X509_LOOKUP_value(sk,i);
267                 if (m == lu->method)
268                         {
269                         return lu;
270                         }
271                 }
272         /* a new one */
273         lu=X509_LOOKUP_new(m);
274         if (lu == NULL)
275                 return NULL;
276         else
277                 {
278                 lu->store_ctx=v;
279                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
280                         return lu;
281                 else
282                         {
283                         X509_LOOKUP_free(lu);
284                         return NULL;
285                         }
286                 }
287         }
288
289 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
290              X509_OBJECT *ret)
291         {
292         X509_STORE *ctx=vs->ctx;
293         X509_LOOKUP *lu;
294         X509_OBJECT stmp,*tmp;
295         int i,j;
296
297         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
298         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
299         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
300
301         if (tmp == NULL || type == X509_LU_CRL)
302                 {
303                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
304                         {
305                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
306                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
307                         if (j < 0)
308                                 {
309                                 vs->current_method=j;
310                                 return j;
311                                 }
312                         else if (j)
313                                 {
314                                 tmp= &stmp;
315                                 break;
316                                 }
317                         }
318                 vs->current_method=0;
319                 if (tmp == NULL)
320                         return 0;
321                 }
322
323 /*      if (ret->data.ptr != NULL)
324                 X509_OBJECT_free_contents(ret); */
325
326         ret->type=tmp->type;
327         ret->data.ptr=tmp->data.ptr;
328
329         X509_OBJECT_up_ref_count(ret);
330
331         return 1;
332         }
333
334 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
335         {
336         X509_OBJECT *obj;
337         int ret=1;
338
339         if (x == NULL) return 0;
340         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
341         if (obj == NULL)
342                 {
343                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
344                 return 0;
345                 }
346         obj->type=X509_LU_X509;
347         obj->data.x509=x;
348
349         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
350
351         X509_OBJECT_up_ref_count(obj);
352
353         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
354                 {
355                 X509_OBJECT_free_contents(obj);
356                 OPENSSL_free(obj);
357                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
358                 ret=0;
359                 } 
360         else sk_X509_OBJECT_push(ctx->objs, obj);
361
362         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
363
364         return ret;
365         }
366
367 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
368         {
369         X509_OBJECT *obj;
370         int ret=1;
371
372         if (x == NULL) return 0;
373         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
374         if (obj == NULL)
375                 {
376                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
377                 return 0;
378                 }
379         obj->type=X509_LU_CRL;
380         obj->data.crl=x;
381
382         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
383
384         X509_OBJECT_up_ref_count(obj);
385
386         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
387                 {
388                 X509_OBJECT_free_contents(obj);
389                 OPENSSL_free(obj);
390                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
391                 ret=0;
392                 }
393         else sk_X509_OBJECT_push(ctx->objs, obj);
394
395         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
396
397         return ret;
398         }
399
400 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
401         {
402         switch (a->type)
403                 {
404         case X509_LU_X509:
405                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
406                 break;
407         case X509_LU_CRL:
408                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
409                 break;
410                 }
411         }
412
413 void X509_OBJECT_free_contents(X509_OBJECT *a)
414         {
415         switch (a->type)
416                 {
417         case X509_LU_X509:
418                 X509_free(a->data.x509);
419                 break;
420         case X509_LU_CRL:
421                 X509_CRL_free(a->data.crl);
422                 break;
423                 }
424         }
425
426 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
427              X509_NAME *name, int *pnmatch)
428         {
429         X509_OBJECT stmp;
430         X509 x509_s;
431         X509_CINF cinf_s;
432         X509_CRL crl_s;
433         X509_CRL_INFO crl_info_s;
434         int idx;
435
436         stmp.type=type;
437         switch (type)
438                 {
439         case X509_LU_X509:
440                 stmp.data.x509= &x509_s;
441                 x509_s.cert_info= &cinf_s;
442                 cinf_s.subject=name;
443                 break;
444         case X509_LU_CRL:
445                 stmp.data.crl= &crl_s;
446                 crl_s.crl= &crl_info_s;
447                 crl_info_s.issuer=name;
448                 break;
449         default:
450                 /* abort(); */
451                 return -1;
452                 }
453
454         idx = sk_X509_OBJECT_find(h,&stmp);
455         if (idx >= 0 && pnmatch)
456                 {
457                 int tidx;
458                 const X509_OBJECT *tobj, *pstmp;
459                 *pnmatch = 1;
460                 pstmp = &stmp;
461                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
462                         {
463                         tobj = sk_X509_OBJECT_value(h, tidx);
464                         if (x509_object_cmp(&tobj, &pstmp))
465                                 break;
466                         (*pnmatch)++;
467                         }
468                 }
469         return idx;
470         }
471
472
473 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
474              X509_NAME *name)
475         {
476         return x509_object_idx_cnt(h, type, name, NULL);
477         }
478
479 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
480              X509_NAME *name)
481         {
482         int idx;
483         idx = X509_OBJECT_idx_by_subject(h, type, name);
484         if (idx==-1) return NULL;
485         return sk_X509_OBJECT_value(h, idx);
486         }
487
488 STACK_OF(X509)* X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
489         {
490         int i, idx, cnt;
491         STACK_OF(X509) *sk;
492         X509 *x;
493         X509_OBJECT *obj;
494         sk = sk_X509_new_null();
495         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
496         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
497         if (idx < 0)
498                 {
499                 /* Nothing found in cache: do lookup to possibly add new
500                  * objects to cache
501                  */
502                 X509_OBJECT xobj;
503                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
504                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
505                         {
506                         sk_X509_free(sk);
507                         return NULL;
508                         }
509                 X509_OBJECT_free_contents(&xobj);
510                 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
511                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
512                 if (idx < 0)
513                         {
514                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
515                         sk_X509_free(sk);
516                         return NULL;
517                         }
518                 }
519         for (i = 0; i < cnt; i++, idx++)
520                 {
521                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
522                 x = obj->data.x509;
523                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
524                 if (!sk_X509_push(sk, x))
525                         {
526                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
527                         X509_free(x);
528                         sk_X509_pop_free(sk, X509_free);
529                         return NULL;
530                         }
531                 }
532         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
533         return sk;
534
535         }
536
537 STACK_OF(X509_CRL)* X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
538         {
539         int i, idx, cnt;
540         STACK_OF(X509_CRL) *sk;
541         X509_CRL *x;
542         X509_OBJECT *obj, xobj;
543         sk = sk_X509_CRL_new_null();
544         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
545         /* Check cache first */
546         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
547
548         /* Always do lookup to possibly add new CRLs to cache
549          */
550         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
551         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
552                 {
553                 sk_X509_CRL_free(sk);
554                 return NULL;
555                 }
556         X509_OBJECT_free_contents(&xobj);
557         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
558         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
559         if (idx < 0)
560                 {
561                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
562                 sk_X509_CRL_free(sk);
563                 return NULL;
564                 }
565
566         for (i = 0; i < cnt; i++, idx++)
567                 {
568                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
569                 x = obj->data.crl;
570                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
571                 if (!sk_X509_CRL_push(sk, x))
572                         {
573                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
574                         X509_CRL_free(x);
575                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
576                         return NULL;
577                         }
578                 }
579         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
580         return sk;
581         }
582
583 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
584         {
585         int idx, i;
586         X509_OBJECT *obj;
587         idx = sk_X509_OBJECT_find(h, x);
588         if (idx == -1) return NULL;
589         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
590                 return sk_X509_OBJECT_value(h, idx);
591         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
592                 {
593                 obj = sk_X509_OBJECT_value(h, i);
594                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
595                         return NULL;
596                 if (x->type == X509_LU_X509)
597                         {
598                         if (!X509_cmp(obj->data.x509, x->data.x509))
599                                 return obj;
600                         }
601                 else if (x->type == X509_LU_CRL)
602                         {
603                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
604                                 return obj;
605                         }
606                 else
607                         return obj;
608                 }
609         return NULL;
610         }
611
612
613 /* Try to get issuer certificate from store. Due to limitations
614  * of the API this can only retrieve a single certificate matching
615  * a given subject name. However it will fill the cache with all
616  * matching certificates, so we can examine the cache for all
617  * matches.
618  *
619  * Return values are:
620  *  1 lookup successful.
621  *  0 certificate not found.
622  * -1 some other error.
623  */
624 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
625         {
626         X509_NAME *xn;
627         X509_OBJECT obj, *pobj;
628         int i, ok, idx, ret;
629         xn=X509_get_issuer_name(x);
630         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
631         if (ok != X509_LU_X509)
632                 {
633                 if (ok == X509_LU_RETRY)
634                         {
635                         X509_OBJECT_free_contents(&obj);
636                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
637                         return -1;
638                         }
639                 else if (ok != X509_LU_FAIL)
640                         {
641                         X509_OBJECT_free_contents(&obj);
642                         /* not good :-(, break anyway */
643                         return -1;
644                         }
645                 return 0;
646                 }
647         /* If certificate matches all OK */
648         if (ctx->check_issued(ctx, x, obj.data.x509))
649                 {
650                 *issuer = obj.data.x509;
651                 return 1;
652                 }
653         X509_OBJECT_free_contents(&obj);
654
655         /* Else find index of first cert accepted by 'check_issued' */
656         ret = 0;
657         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
658         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
659         if (idx != -1) /* should be true as we've had at least one match */
660                 {
661                 /* Look through all matching certs for suitable issuer */
662                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
663                         {
664                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
665                         /* See if we've run past the matches */
666                         if (pobj->type != X509_LU_X509)
667                                 break;
668                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
669                                 break;
670                         if (ctx->check_issued(ctx, x, pobj->data.x509))
671                                 {
672                                 *issuer = pobj->data.x509;
673                                 X509_OBJECT_up_ref_count(pobj);
674                                 ret = 1;
675                                 break;
676                                 }
677                         }
678                 }
679         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
680         return ret;
681         }
682
683 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
684         {
685         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
686         }
687
688 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
689         {
690         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
691         return 1;
692         }
693
694 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
695         {
696         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
697         }
698
699 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
700         {
701         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
702         }
703
704 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
705         {
706         return X509_VERIFY_PARAM_set1(ctx->param, param);
707         }
708
709 void X509_STORE_set_verify_cb(X509_STORE *ctx,
710                                   int (*verify_cb)(int, X509_STORE_CTX *))
711         {
712         ctx->verify_cb = verify_cb;
713         }
714
715 IMPLEMENT_STACK_OF(X509_LOOKUP)
716 IMPLEMENT_STACK_OF(X509_OBJECT)