test_mod_mul is useful, let's run it more often.
[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
64 static STACK_OF(CRYPTO_EX_DATA_FUNCS) *x509_store_meth=NULL;
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=NULL;
189         ret->verify_cb=NULL;
190         memset(&ret->ex_data,0,sizeof(CRYPTO_EX_DATA));
191         ret->references=1;
192         ret->depth=0;
193         return ret;
194         }
195
196 static void cleanup(X509_OBJECT *a)
197         {
198         if (a->type == X509_LU_X509)
199                 {
200                 X509_free(a->data.x509);
201                 }
202         else if (a->type == X509_LU_CRL)
203                 {
204                 X509_CRL_free(a->data.crl);
205                 }
206         else
207                 {
208                 /* abort(); */
209                 }
210
211         OPENSSL_free(a);
212         }
213
214 void X509_STORE_free(X509_STORE *vfy)
215         {
216         int i;
217         STACK_OF(X509_LOOKUP) *sk;
218         X509_LOOKUP *lu;
219
220         if (vfy == NULL)
221             return;
222
223         sk=vfy->get_cert_methods;
224         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
225                 {
226                 lu=sk_X509_LOOKUP_value(sk,i);
227                 X509_LOOKUP_shutdown(lu);
228                 X509_LOOKUP_free(lu);
229                 }
230         sk_X509_LOOKUP_free(sk);
231         sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
232
233         CRYPTO_free_ex_data(x509_store_meth,vfy,&vfy->ex_data);
234         OPENSSL_free(vfy);
235         }
236
237 X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
238         {
239         int i;
240         STACK_OF(X509_LOOKUP) *sk;
241         X509_LOOKUP *lu;
242
243         sk=v->get_cert_methods;
244         for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
245                 {
246                 lu=sk_X509_LOOKUP_value(sk,i);
247                 if (m == lu->method)
248                         {
249                         return lu;
250                         }
251                 }
252         /* a new one */
253         lu=X509_LOOKUP_new(m);
254         if (lu == NULL)
255                 return NULL;
256         else
257                 {
258                 lu->store_ctx=v;
259                 if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
260                         return lu;
261                 else
262                         {
263                         X509_LOOKUP_free(lu);
264                         return NULL;
265                         }
266                 }
267         }
268
269 int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
270              X509_OBJECT *ret)
271         {
272         X509_STORE *ctx=vs->ctx;
273         X509_LOOKUP *lu;
274         X509_OBJECT stmp,*tmp;
275         int i,j;
276
277         tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
278
279         if (tmp == NULL)
280                 {
281                 for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
282                         {
283                         lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
284                         j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
285                         if (j < 0)
286                                 {
287                                 vs->current_method=j;
288                                 return j;
289                                 }
290                         else if (j)
291                                 {
292                                 tmp= &stmp;
293                                 break;
294                                 }
295                         }
296                 vs->current_method=0;
297                 if (tmp == NULL)
298                         return 0;
299                 }
300
301 /*      if (ret->data.ptr != NULL)
302                 X509_OBJECT_free_contents(ret); */
303
304         ret->type=tmp->type;
305         ret->data.ptr=tmp->data.ptr;
306
307         X509_OBJECT_up_ref_count(ret);
308
309         return 1;
310         }
311
312 int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
313         {
314         X509_OBJECT *obj;
315         int ret=1;
316
317         if (x == NULL) return 0;
318         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
319         if (obj == NULL)
320                 {
321                 X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
322                 return 0;
323                 }
324         obj->type=X509_LU_X509;
325         obj->data.x509=x;
326
327         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
328
329         X509_OBJECT_up_ref_count(obj);
330
331
332         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
333                 {
334                 X509_OBJECT_free_contents(obj);
335                 OPENSSL_free(obj);
336                 X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
337                 ret=0;
338                 } 
339         else sk_X509_OBJECT_push(ctx->objs, obj);
340
341         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
342
343         return ret;
344         }
345
346 int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
347         {
348         X509_OBJECT *obj;
349         int ret=1;
350
351         if (x == NULL) return 0;
352         obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
353         if (obj == NULL)
354                 {
355                 X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
356                 return 0;
357                 }
358         obj->type=X509_LU_CRL;
359         obj->data.crl=x;
360
361         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
362
363         X509_OBJECT_up_ref_count(obj);
364
365         if (X509_OBJECT_retrieve_match(ctx->objs, obj))
366                 {
367                 X509_OBJECT_free_contents(obj);
368                 OPENSSL_free(obj);
369                 X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
370                 ret=0;
371                 }
372         else sk_X509_OBJECT_push(ctx->objs, obj);
373
374         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
375
376         return ret;
377         }
378
379 void X509_OBJECT_up_ref_count(X509_OBJECT *a)
380         {
381         switch (a->type)
382                 {
383         case X509_LU_X509:
384                 CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
385                 break;
386         case X509_LU_CRL:
387                 CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
388                 break;
389                 }
390         }
391
392 void X509_OBJECT_free_contents(X509_OBJECT *a)
393         {
394         switch (a->type)
395                 {
396         case X509_LU_X509:
397                 X509_free(a->data.x509);
398                 break;
399         case X509_LU_CRL:
400                 X509_CRL_free(a->data.crl);
401                 break;
402                 }
403         }
404
405 int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
406              X509_NAME *name)
407         {
408         X509_OBJECT stmp;
409         X509 x509_s;
410         X509_CINF cinf_s;
411         X509_CRL crl_s;
412         X509_CRL_INFO crl_info_s;
413
414         stmp.type=type;
415         switch (type)
416                 {
417         case X509_LU_X509:
418                 stmp.data.x509= &x509_s;
419                 x509_s.cert_info= &cinf_s;
420                 cinf_s.subject=name;
421                 break;
422         case X509_LU_CRL:
423                 stmp.data.crl= &crl_s;
424                 crl_s.crl= &crl_info_s;
425                 crl_info_s.issuer=name;
426                 break;
427         default:
428                 /* abort(); */
429                 return -1;
430                 }
431
432         return sk_X509_OBJECT_find(h,&stmp);
433         }
434
435 X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
436              X509_NAME *name)
437 {
438         int idx;
439         idx = X509_OBJECT_idx_by_subject(h, type, name);
440         if (idx==-1) return NULL;
441         return sk_X509_OBJECT_value(h, idx);
442 }
443
444 X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
445 {
446         int idx, i;
447         X509_OBJECT *obj;
448         idx = sk_X509_OBJECT_find(h, x);
449         if (idx == -1) return NULL;
450         if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);
451         for (i = idx; i < sk_X509_OBJECT_num(h); i++)
452                 {
453                 obj = sk_X509_OBJECT_value(h, i);
454                 if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
455                         return NULL;
456                 if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))
457                         return obj;
458                 }
459         return NULL;
460 }
461
462
463 /* Try to get issuer certificate from store. Due to limitations
464  * of the API this can only retrieve a single certificate matching
465  * a given subject name. However it will fill the cache with all
466  * matching certificates, so we can examine the cache for all 
467  * matches.
468  *
469  * Return values are:
470  *  1 lookup successful.
471  *  0 certificate not found.
472  * -1 some other error.
473  */
474
475
476 int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
477 {
478         X509_NAME *xn;
479         X509_OBJECT obj, *pobj;
480         int i, ok, idx;
481         xn=X509_get_issuer_name(x);
482         ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
483         if (ok != X509_LU_X509)
484                 {
485                 if (ok == X509_LU_RETRY)
486                         {
487                         X509_OBJECT_free_contents(&obj);
488                         X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
489                         return -1;
490                         }
491                 else if (ok != X509_LU_FAIL)
492                         {
493                         X509_OBJECT_free_contents(&obj);
494                         /* not good :-(, break anyway */
495                         return -1;
496                         }
497                 return 0;
498                 }
499         /* If certificate matches all OK */
500         if (ctx->check_issued(ctx, x, obj.data.x509))
501                 {
502                 *issuer = obj.data.x509;
503                 return 1;
504                 }
505         X509_OBJECT_free_contents(&obj);
506         /* Else find index of first matching cert */
507         idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
508         /* This shouldn't normally happen since we already have one match */
509         if (idx == -1) return 0;
510
511         /* Look through all matching certificates for a suitable issuer */
512         for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
513                 {
514                 pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
515                 /* See if we've ran out of matches */
516                 if (pobj->type != X509_LU_X509) return 0;
517                 if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
518                 if (ctx->check_issued(ctx, x, pobj->data.x509))
519                         {
520                         *issuer = pobj->data.x509;
521                         X509_OBJECT_up_ref_count(pobj);
522                         return 1;
523                         }
524                 }
525         return 0;
526 }
527
528 IMPLEMENT_STACK_OF(X509_LOOKUP)
529 IMPLEMENT_STACK_OF(X509_OBJECT)