More indent fixes for STACK_OF
[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 #include "x509_lcl.h"
65
66 X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
67         {
68         X509_LOOKUP *ret;
69
70         ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
71         if (ret == NULL) return NULL;
72
73         ret->init=0;
74         ret->skip=0;
75         ret->method=method;
76         ret->method_data=NULL;
77         ret->store_ctx=NULL;
78         if ((method->new_item != NULL) && !method->new_item(ret))
79                 {
80                 OPENSSL_free(ret);
81                 return NULL;
82                 }
83         return ret;
84         }
85
86 void X509_LOOKUP_free(X509_LOOKUP *ctx)
87         {
88         if (ctx == NULL) return;
89         if (    (ctx->method != NULL) &&
90                 (ctx->method->free != NULL))
91                 (*ctx->method->free)(ctx);
92         OPENSSL_free(ctx);
93         }
94
95 int X509_LOOKUP_init(X509_LOOKUP *ctx)
96         {
97         if (ctx->method == NULL) return 0;
98         if (ctx->method->init != NULL)
99                 return ctx->method->init(ctx);
100         else
101                 return 1;
102         }
103
104 int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
105         {
106         if (ctx->method == NULL) return 0;
107         if (ctx->method->shutdown != NULL)
108                 return ctx->method->shutdown(ctx);
109         else
110                 return 1;
111         }
112
113 int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
114              char **ret)
115         {
116         if (ctx->method == NULL) return -1;
117         if (ctx->method->ctrl != NULL)
118                 return ctx->method->ctrl(ctx,cmd,argc,argl,ret);
119         else
120                 return 1;
121         }
122
123 int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
124              X509_OBJECT *ret)
125         {
126         if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
127                 return X509_LU_FAIL;
128         if (ctx->skip) return 0;
129         return ctx->method->get_by_subject(ctx,type,name,ret);
130         }
131
132 int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
133              ASN1_INTEGER *serial, X509_OBJECT *ret)
134         {
135         if ((ctx->method == NULL) ||
136                 (ctx->method->get_by_issuer_serial == NULL))
137                 return X509_LU_FAIL;
138         return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);
139         }
140
141 int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
142              unsigned char *bytes, int len, X509_OBJECT *ret)
143         {
144         if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
145                 return X509_LU_FAIL;
146         return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);
147         }
148
149 int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
150              X509_OBJECT *ret)
151         {
152         if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
153                 return X509_LU_FAIL;
154         return ctx->method->get_by_alias(ctx,type,str,len,ret);
155         }
156
157   
158 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
159         {
160         int ret;
161
162         ret=((*a)->type - (*b)->type);
163         if (ret) return ret;
164         switch ((*a)->type)
165                 {
166         case X509_LU_X509:
167                 ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);
168                 break;
169         case X509_LU_CRL:
170                 ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);
171                 break;
172         default:
173                 /* abort(); */
174                 return 0;
175                 }
176         return ret;
177         }
178
179 X509_STORE *X509_STORE_new(void)
180         {
181         X509_STORE *ret;
182
183         if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
184                 return NULL;
185         ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
186         ret->cache=1;
187         ret->get_cert_methods=sk_X509_LOOKUP_new_null();
188         ret->verify=0;
189         ret->verify_cb=0;
190
191         if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
192                 return NULL;
193
194         ret->get_issuer = 0;
195         ret->check_issued = 0;
196         ret->check_revocation = 0;
197         ret->get_crl = 0;
198         ret->check_crl = 0;
199         ret->cert_crl = 0;
200         ret->lookup_certs = 0;
201         ret->lookup_crls = 0;
202         ret->cleanup = 0;
203
204         if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
205                 {
206                 sk_X509_OBJECT_free(ret->objs);
207                 OPENSSL_free(ret);
208                 return NULL;
209                 }
210
211         ret->references=1;
212         return ret;
213         }
214
215 static void cleanup(X509_OBJECT *a)
216         {
217         if (a->type == X509_LU_X509)
218                 {
219                 X509_free(a->data.x509);
220                 }
221         else if (a->type == X509_LU_CRL)
222                 {
223                 X509_CRL_free(a->data.crl);
224                 }
225         else
226                 {
227                 /* abort(); */
228                 }
229
230         OPENSSL_free(a);
231         }
232
233 void X509_STORE_free(X509_STORE *vfy)
234         {
235         int i;
236         STACK_OF(X509_LOOKUP) *sk;
237         X509_LOOKUP *lu;
238
239         if (vfy == NULL)
240             return;
241
242         i=CRYPTO_add(&vfy->references,-1,CRYPTO_LOCK_X509_STORE);
243 #ifdef REF_PRINT
244         REF_PRINT("X509_STORE",vfy);
245 #endif
246         if (i > 0) return;
247 #ifdef REF_CHECK
248         if (i < 0)
249                 {
250                 fprintf(stderr,"X509_STORE_free, bad reference count\n");
251                 abort(); /* ok */
252                 }
253 #endif
254
255         sk=vfy->get_cert_methods;
256         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
257                 {
258                 lu=sk_X509_LOOKUP_value(sk,i);
259                 X509_LOOKUP_shutdown(lu);
260                 X509_LOOKUP_free(lu);
261                 }
262         sk_X509_LOOKUP_free(sk);
263         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
264
265         CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
266         if (vfy->param)
267                 X509_VERIFY_PARAM_free(vfy->param);
268         OPENSSL_free(vfy);
269         }
270
271 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
272         {
273         int i;
274         STACK_OF(X509_LOOKUP) *sk;
275         X509_LOOKUP *lu;
276
277         sk=v->get_cert_methods;
278         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
279                 {
280                 lu=sk_X509_LOOKUP_value(sk,i);
281                 if (m == lu->method)
282                         {
283                         return lu;
284                         }
285                 }
286         /* a new one */
287         lu=X509_LOOKUP_new(m);
288         if (lu == NULL)
289                 return NULL;
290         else
291                 {
292                 lu->store_ctx=v;
293                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
294                         return lu;
295                 else
296                         {
297                         X509_LOOKUP_free(lu);
298                         return NULL;
299                         }
300                 }
301         }
302
303 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
304              X509_OBJECT *ret)
305         {
306         X509_STORE *ctx=vs->ctx;
307         X509_LOOKUP *lu;
308         X509_OBJECT stmp,*tmp;
309         int i,j;
310
311         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
312         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
313         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
314
315         if (tmp == NULL || type == X509_LU_CRL)
316                 {
317                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
318                         {
319                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
320                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
321                         if (j < 0)
322                                 {
323                                 vs->current_method=j;
324                                 return j;
325                                 }
326                         else if (j)
327                                 {
328                                 tmp= &stmp;
329                                 break;
330                                 }
331                         }
332                 vs->current_method=0;
333                 if (tmp == NULL)
334                         return 0;
335                 }
336
337 /*-     if (ret->data.ptr != NULL)
338                 X509_OBJECT_free_contents(ret); */
339
340         ret->type=tmp->type;
341         ret->data.ptr=tmp->data.ptr;
342
343         X509_OBJECT_up_ref_count(ret);
344
345         return 1;
346         }
347
348 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
349         {
350         X509_OBJECT *obj;
351         int ret=1;
352
353         if (x == NULL) return 0;
354         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
355         if (obj == NULL)
356                 {
357                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
358                 return 0;
359                 }
360         obj->type=X509_LU_X509;
361         obj->data.x509=x;
362
363         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
364
365         X509_OBJECT_up_ref_count(obj);
366
367         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
368                 {
369                 X509_OBJECT_free_contents(obj);
370                 OPENSSL_free(obj);
371                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
372                 ret=0;
373                 } 
374         else sk_X509_OBJECT_push(ctx->objs, obj);
375
376         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
377
378         return ret;
379         }
380
381 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
382         {
383         X509_OBJECT *obj;
384         int ret=1;
385
386         if (x == NULL) return 0;
387         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
388         if (obj == NULL)
389                 {
390                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
391                 return 0;
392                 }
393         obj->type=X509_LU_CRL;
394         obj->data.crl=x;
395
396         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
397
398         X509_OBJECT_up_ref_count(obj);
399
400         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
401                 {
402                 X509_OBJECT_free_contents(obj);
403                 OPENSSL_free(obj);
404                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
405                 ret=0;
406                 }
407         else sk_X509_OBJECT_push(ctx->objs, obj);
408
409         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
410
411         return ret;
412         }
413
414 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
415         {
416         switch (a->type)
417                 {
418         case X509_LU_X509:
419                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
420                 break;
421         case X509_LU_CRL:
422                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
423                 break;
424                 }
425         }
426
427 void X509_OBJECT_free_contents(X509_OBJECT *a)
428         {
429         switch (a->type)
430                 {
431         case X509_LU_X509:
432                 X509_free(a->data.x509);
433                 break;
434         case X509_LU_CRL:
435                 X509_CRL_free(a->data.crl);
436                 break;
437                 }
438         }
439
440 static int x509_object_idx_cnt(STACK_OF(X509_OBJECT) *h, int type,
441              X509_NAME *name, int *pnmatch)
442         {
443         X509_OBJECT stmp;
444         X509 x509_s;
445         X509_CINF cinf_s;
446         X509_CRL crl_s;
447         X509_CRL_INFO crl_info_s;
448         int idx;
449
450         stmp.type=type;
451         switch (type)
452                 {
453         case X509_LU_X509:
454                 stmp.data.x509= &x509_s;
455                 x509_s.cert_info= &cinf_s;
456                 cinf_s.subject=name;
457                 break;
458         case X509_LU_CRL:
459                 stmp.data.crl= &crl_s;
460                 crl_s.crl= &crl_info_s;
461                 crl_info_s.issuer=name;
462                 break;
463         default:
464                 /* abort(); */
465                 return -1;
466                 }
467
468         idx = sk_X509_OBJECT_find(h,&stmp);
469         if (idx >= 0 && pnmatch)
470                 {
471                 int tidx;
472                 const X509_OBJECT *tobj, *pstmp;
473                 *pnmatch = 1;
474                 pstmp = &stmp;
475                 for (tidx = idx + 1; tidx < sk_X509_OBJECT_num(h); tidx++)
476                         {
477                         tobj = sk_X509_OBJECT_value(h, tidx);
478                         if (x509_object_cmp(&tobj, &pstmp))
479                                 break;
480                         (*pnmatch)++;
481                         }
482                 }
483         return idx;
484         }
485
486
487 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
488              X509_NAME *name)
489         {
490         return x509_object_idx_cnt(h, type, name, NULL);
491         }
492
493 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
494              X509_NAME *name)
495         {
496         int idx;
497         idx = X509_OBJECT_idx_by_subject(h, type, name);
498         if (idx==-1) return NULL;
499         return sk_X509_OBJECT_value(h, idx);
500         }
501
502 STACK_OF(X509) *X509_STORE_get1_certs(X509_STORE_CTX *ctx, X509_NAME *nm)
503         {
504         int i, idx, cnt;
505         STACK_OF(X509) *sk;
506         X509 *x;
507         X509_OBJECT *obj;
508         sk = sk_X509_new_null();
509         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
510         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_X509, nm, &cnt);
511         if (idx < 0)
512                 {
513                 /* Nothing found in cache: do lookup to possibly add new
514                  * objects to cache
515                  */
516                 X509_OBJECT xobj;
517                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
518                 if (!X509_STORE_get_by_subject(ctx, X509_LU_X509, nm, &xobj))
519                         {
520                         sk_X509_free(sk);
521                         return NULL;
522                         }
523                 X509_OBJECT_free_contents(&xobj);
524                 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
525                 idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_X509,nm, &cnt);
526                 if (idx < 0)
527                         {
528                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
529                         sk_X509_free(sk);
530                         return NULL;
531                         }
532                 }
533         for (i = 0; i < cnt; i++, idx++)
534                 {
535                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
536                 x = obj->data.x509;
537                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
538                 if (!sk_X509_push(sk, x))
539                         {
540                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
541                         X509_free(x);
542                         sk_X509_pop_free(sk, X509_free);
543                         return NULL;
544                         }
545                 }
546         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
547         return sk;
548
549         }
550
551 STACK_OF(X509_CRL) *X509_STORE_get1_crls(X509_STORE_CTX *ctx, X509_NAME *nm)
552         {
553         int i, idx, cnt;
554         STACK_OF(X509_CRL) *sk;
555         X509_CRL *x;
556         X509_OBJECT *obj, xobj;
557         sk = sk_X509_CRL_new_null();
558         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
559         /* Check cache first */
560         idx = x509_object_idx_cnt(ctx->ctx->objs, X509_LU_CRL, nm, &cnt);
561
562         /* Always do lookup to possibly add new CRLs to cache
563          */
564         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
565         if (!X509_STORE_get_by_subject(ctx, X509_LU_CRL, nm, &xobj))
566                 {
567                 sk_X509_CRL_free(sk);
568                 return NULL;
569                 }
570         X509_OBJECT_free_contents(&xobj);
571         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
572         idx = x509_object_idx_cnt(ctx->ctx->objs,X509_LU_CRL, nm, &cnt);
573         if (idx < 0)
574                 {
575                 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
576                 sk_X509_CRL_free(sk);
577                 return NULL;
578                 }
579
580         for (i = 0; i < cnt; i++, idx++)
581                 {
582                 obj = sk_X509_OBJECT_value(ctx->ctx->objs, idx);
583                 x = obj->data.crl;
584                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509_CRL);
585                 if (!sk_X509_CRL_push(sk, x))
586                         {
587                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
588                         X509_CRL_free(x);
589                         sk_X509_CRL_pop_free(sk, X509_CRL_free);
590                         return NULL;
591                         }
592                 }
593         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
594         return sk;
595         }
596
597 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
598         {
599         int idx, i;
600         X509_OBJECT *obj;
601         idx = sk_X509_OBJECT_find(h, x);
602         if (idx == -1) return NULL;
603         if ((x->type != X509_LU_X509) && (x->type != X509_LU_CRL))
604                 return sk_X509_OBJECT_value(h, idx);
605         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
606                 {
607                 obj = sk_X509_OBJECT_value(h, i);
608                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
609                         return NULL;
610                 if (x->type == X509_LU_X509)
611                         {
612                         if (!X509_cmp(obj->data.x509, x->data.x509))
613                                 return obj;
614                         }
615                 else if (x->type == X509_LU_CRL)
616                         {
617                         if (!X509_CRL_match(obj->data.crl, x->data.crl))
618                                 return obj;
619                         }
620                 else
621                         return obj;
622                 }
623         return NULL;
624         }
625
626
627 /*-
628  * Try to get issuer certificate from store. Due to limitations
629  * of the API this can only retrieve a single certificate matching
630  * a given subject name. However it will fill the cache with all
631  * matching certificates, so we can examine the cache for all
632  * matches.
633  *
634  * Return values are:
635  *  1 lookup successful.
636  *  0 certificate not found.
637  * -1 some other error.
638  */
639 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
640         {
641         X509_NAME *xn;
642         X509_OBJECT obj, *pobj;
643         int i, ok, idx, ret;
644         *issuer = NULL;
645         xn=X509_get_issuer_name(x);
646         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
647         if (ok != X509_LU_X509)
648                 {
649                 if (ok == X509_LU_RETRY)
650                         {
651                         X509_OBJECT_free_contents(&obj);
652                         X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
653                         return -1;
654                         }
655                 else if (ok != X509_LU_FAIL)
656                         {
657                         X509_OBJECT_free_contents(&obj);
658                         /* not good :-(, break anyway */
659                         return -1;
660                         }
661                 return 0;
662                 }
663         /* If certificate matches all OK */
664         if (ctx->check_issued(ctx, x, obj.data.x509))
665                 {
666                 if (x509_check_cert_time(ctx, obj.data.x509, 1))
667                         {
668                         *issuer = obj.data.x509;
669                         return 1;
670                         }
671                 }
672         X509_OBJECT_free_contents(&obj);
673
674         /* Else find index of first cert accepted by 'check_issued' */
675         ret = 0;
676         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
677         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
678         if (idx != -1) /* should be true as we've had at least one match */
679                 {
680                 /* Look through all matching certs for suitable issuer */
681                 for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
682                         {
683                         pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
684                         /* See if we've run past the matches */
685                         if (pobj->type != X509_LU_X509)
686                                 break;
687                         if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
688                                 break;
689                         if (ctx->check_issued(ctx, x, pobj->data.x509))
690                                 {
691                                 *issuer = pobj->data.x509;
692                                 ret = 1;
693                                 /*
694                                  * If times check, exit with match,
695                                  * otherwise keep looking. Leave last
696                                  * match in issuer so we return nearest
697                                  * match if no certificate time is OK.
698                                  */
699
700                                 if (x509_check_cert_time(ctx, *issuer, 1))
701                                         break;
702                                 }
703                         }
704                 }
705         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
706         if (*issuer)
707                 CRYPTO_add(&(*issuer)->references,1,CRYPTO_LOCK_X509);
708         return ret;
709         }
710
711 int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
712         {
713         return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
714         }
715
716 int X509_STORE_set_depth(X509_STORE *ctx, int depth)
717         {
718         X509_VERIFY_PARAM_set_depth(ctx->param, depth);
719         return 1;
720         }
721
722 int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
723         {
724         return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
725         }
726
727 int X509_STORE_set_trust(X509_STORE *ctx, int trust)
728         {
729         return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
730         }
731
732 int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
733         {
734         return X509_VERIFY_PARAM_set1(ctx->param, param);
735         }
736
737 void X509_STORE_set_verify_cb(X509_STORE *ctx,
738                                   int (*verify_cb)(int, X509_STORE_CTX *))
739         {
740         ctx->verify_cb = verify_cb;
741         }
742
743 void X509_STORE_set_lookup_crls_cb(X509_STORE *ctx,
744                 STACK_OF(X509_CRL) *(*cb)(X509_STORE_CTX *ctx, X509_NAME *nm))
745         {
746         ctx->lookup_crls = cb;
747         }
748
749 X509_STORE *X509_STORE_CTX_get0_store(X509_STORE_CTX *ctx)
750         {
751         return ctx->ctx;
752         }
753
754 IMPLEMENT_STACK_OF(X509_LOOKUP)
755 IMPLEMENT_STACK_OF(X509_OBJECT)