Add support for nameRelativeToCRLIssuer field in distribution point name
[openssl.git] / crypto / x509 / by_dir.c
1 /* crypto/x509/by_dir.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 <time.h>
61 #include <errno.h>
62
63 #include "cryptlib.h"
64
65 #ifndef NO_SYS_TYPES_H
66 # include <sys/types.h>
67 #endif
68 #ifndef OPENSSL_NO_POSIX_IO
69 # include <sys/stat.h>
70 #endif
71
72 #include <openssl/lhash.h>
73 #include <openssl/x509.h>
74
75
76 typedef struct lookup_dir_hashes_st
77         {
78         unsigned long hash;
79         int suffix;
80         } BY_DIR_HASH;
81
82 typedef struct lookup_dir_entry_st
83         {
84         char *dir;
85         int dir_type;
86         STACK_OF(BY_DIR_HASH) *hashes;
87         } BY_DIR_ENTRY;
88
89 typedef struct lookup_dir_st
90         {
91         BUF_MEM *buffer;
92         STACK_OF(BY_DIR_ENTRY) *dirs;
93         } BY_DIR;
94
95 DECLARE_STACK_OF(BY_DIR_HASH)
96 DECLARE_STACK_OF(BY_DIR_ENTRY)
97
98 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
99         char **ret);
100 static int new_dir(X509_LOOKUP *lu);
101 static void free_dir(X509_LOOKUP *lu);
102 static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
103 static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
104         X509_OBJECT *ret);
105 X509_LOOKUP_METHOD x509_dir_lookup=
106         {
107         "Load certs from files in a directory",
108         new_dir,                /* new */
109         free_dir,               /* free */
110         NULL,                   /* init */
111         NULL,                   /* shutdown */
112         dir_ctrl,               /* ctrl */
113         get_cert_by_subject,    /* get_by_subject */
114         NULL,                   /* get_by_issuer_serial */
115         NULL,                   /* get_by_fingerprint */
116         NULL,                   /* get_by_alias */
117         };
118
119 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
120         {
121         return(&x509_dir_lookup);
122         }
123
124 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
125              char **retp)
126         {
127         int ret=0;
128         BY_DIR *ld;
129         char *dir = NULL;
130
131         ld=(BY_DIR *)ctx->method_data;
132
133         switch (cmd)
134                 {
135         case X509_L_ADD_DIR:
136                 if (argl == X509_FILETYPE_DEFAULT)
137                         {
138                         dir=(char *)getenv(X509_get_default_cert_dir_env());
139                         if (dir)
140                                 ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
141                         else
142                                 ret=add_cert_dir(ld,X509_get_default_cert_dir(),
143                                         X509_FILETYPE_PEM);
144                         if (!ret)
145                                 {
146                                 X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
147                                 }
148                         }
149                 else
150                         ret=add_cert_dir(ld,argp,(int)argl);
151                 break;
152                 }
153         return(ret);
154         }
155
156 static int new_dir(X509_LOOKUP *lu)
157         {
158         BY_DIR *a;
159
160         if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
161                 return(0);
162         if ((a->buffer=BUF_MEM_new()) == NULL)
163                 {
164                 OPENSSL_free(a);
165                 return(0);
166                 }
167         a->dirs=NULL;
168         lu->method_data=(char *)a;
169         return(1);
170         }
171
172 static void by_dir_hash_free(BY_DIR_HASH *hash)
173         {
174         OPENSSL_free(hash);
175         }
176
177 static int by_dir_hash_cmp(const BY_DIR_HASH * const *a,
178                         const BY_DIR_HASH * const *b)
179         {
180         if ((*a)->hash > (*b)->hash)
181                 return 1;
182         if ((*a)->hash < (*b)->hash)
183                 return -1;
184         return 0;
185         }
186
187 static void by_dir_entry_free(BY_DIR_ENTRY *ent)
188         {
189         if (ent->dir)
190                 OPENSSL_free(ent->dir);
191         if (ent->hashes)
192                 sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
193         OPENSSL_free(ent);
194         }
195
196 static void free_dir(X509_LOOKUP *lu)
197         {
198         BY_DIR *a;
199
200         a=(BY_DIR *)lu->method_data;
201         if (a->dirs != NULL)
202                 sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
203         if (a->buffer != NULL)
204                 BUF_MEM_free(a->buffer);
205         OPENSSL_free(a);
206         }
207
208 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
209         {
210         int j,len;
211         const char *s,*ss,*p;
212
213         if (dir == NULL || !*dir)
214             {
215             X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
216             return 0;
217             }
218
219         s=dir;
220         p=s;
221         for (;;p++)
222                 {
223                 if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
224                         {
225                         BY_DIR_ENTRY *ent;
226                         ss=s;
227                         s=p+1;
228                         len=(int)(p-ss);
229                         if (len == 0) continue;
230                         for (j=0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++)
231                                 {
232                                 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
233                                 if (strlen(ent->dir) == (size_t)len &&
234                                     strncmp(ent->dir,ss,(unsigned int)len) == 0)
235                                         break;
236                                 }
237                         if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
238                                 continue;
239                         if (ctx->dirs == NULL)
240                                 {
241                                 ctx->dirs = sk_BY_DIR_ENTRY_new_null();
242                                 if (!ctx->dirs)
243                                         {
244                                         X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
245                                         return 0;
246                                         }
247                                 }
248                         ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
249                         if (!ent)
250                                 return 0;
251                         ent->dir_type = type;
252                         ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
253                         ent->dir = OPENSSL_malloc((unsigned int)len+1);
254                         if (!ent->dir || !ent->hashes)
255                                 {
256                                 by_dir_entry_free(ent);
257                                 return 0;
258                                 }
259                         strncpy(ent->dir,ss,(unsigned int)len);
260                         ent->dir[len] = '\0';
261                         if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent))
262                                 {
263                                 by_dir_entry_free(ent);
264                                 return 0;
265                                 }
266                         }
267                 if (*p == '\0')
268                         break;
269                 }
270         return 1;
271         }
272
273 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
274              X509_OBJECT *ret)
275         {
276         BY_DIR *ctx;
277         union   {
278                 struct  {
279                         X509 st_x509;
280                         X509_CINF st_x509_cinf;
281                         } x509;
282                 struct  {
283                         X509_CRL st_crl;
284                         X509_CRL_INFO st_crl_info;
285                         } crl;
286                 } data;
287         int ok=0;
288         int i,j,k;
289         unsigned long h;
290         BUF_MEM *b=NULL;
291         X509_OBJECT stmp,*tmp;
292         const char *postfix="";
293
294         if (name == NULL) return(0);
295
296         stmp.type=type;
297         if (type == X509_LU_X509)
298                 {
299                 data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
300                 data.x509.st_x509_cinf.subject=name;
301                 stmp.data.x509= &data.x509.st_x509;
302                 postfix="";
303                 }
304         else if (type == X509_LU_CRL)
305                 {
306                 data.crl.st_crl.crl= &data.crl.st_crl_info;
307                 data.crl.st_crl_info.issuer=name;
308                 stmp.data.crl= &data.crl.st_crl;
309                 postfix="r";
310                 }
311         else
312                 {
313                 X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
314                 goto finish;
315                 }
316
317         if ((b=BUF_MEM_new()) == NULL)
318                 {
319                 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
320                 goto finish;
321                 }
322         
323         ctx=(BY_DIR *)xl->method_data;
324
325         h=X509_NAME_hash(name);
326         for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++)
327                 {
328                 BY_DIR_ENTRY *ent;
329                 int idx;
330                 BY_DIR_HASH htmp, *hent;
331                 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
332                 j=strlen(ent->dir)+1+8+6+1+1;
333                 if (!BUF_MEM_grow(b,j))
334                         {
335                         X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
336                         goto finish;
337                         }
338                 if (type == X509_LU_CRL && ent->hashes)
339                         {
340                         htmp.hash = h;
341                         CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
342                         idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
343                         if (idx >= 0)
344                                 {
345                                 hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
346                                 k = hent->suffix;
347                                 }
348                         else
349                                 {
350                                 hent = NULL;
351                                 k=0;
352                                 }
353                         CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
354                         }
355                 else
356                         {
357                         k = 0;
358                         hent = NULL;
359                         }
360                 for (;;)
361                         {
362                         char c = '/';
363 #ifdef OPENSSL_SYS_VMS
364                         c = ent->dir[strlen(ent->dir)-1];
365                         if (c != ':' && c != '>' && c != ']')
366                                 {
367                                 /* If no separator is present, we assume the
368                                    directory specifier is a logical name, and
369                                    add a colon.  We really should use better
370                                    VMS routines for merging things like this,
371                                    but this will do for now...
372                                    -- Richard Levitte */
373                                 c = ':';
374                                 }
375                         else
376                                 {
377                                 c = '\0';
378                                 }
379 #endif
380                         if (c == '\0')
381                                 {
382                                 /* This is special.  When c == '\0', no
383                                    directory separator should be added. */
384                                 BIO_snprintf(b->data,b->max,
385                                         "%s%08lx.%s%d",ent->dir,h,
386                                         postfix,k);
387                                 }
388                         else
389                                 {
390                                 BIO_snprintf(b->data,b->max,
391                                         "%s%c%08lx.%s%d",ent->dir,c,h,
392                                         postfix,k);
393                                 }
394 #ifndef OPENSSL_NO_POSIX_IO
395                         {
396                         struct stat st;
397                         if (stat(b->data,&st) < 0)
398                                 break;
399                         }
400 #endif
401                         /* found one. */
402                         if (type == X509_LU_X509)
403                                 {
404                                 if ((X509_load_cert_file(xl,b->data,
405                                         ent->dir_type)) == 0)
406                                         break;
407                                 }
408                         else if (type == X509_LU_CRL)
409                                 {
410                                 if ((X509_load_crl_file(xl,b->data,
411                                         ent->dir_type)) == 0)
412                                         break;
413                                 }
414                         /* else case will caught higher up */
415                         k++;
416                         }
417
418                 /* we have added it to the cache so now pull
419                  * it out again */
420                 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
421                 j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
422                 if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
423                 else tmp = NULL;
424                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
425
426
427                 /* If a CRL, update the last file suffix added for this */
428
429                 if (type == X509_LU_CRL)
430                         {
431                         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
432                         /* Look for entry again in case another thread added
433                          * an entry first.
434                          */
435                         if (!hent)
436                                 {
437                                 htmp.hash = h;
438                                 idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
439                                 if (idx >= 0)
440                                         hent =
441                                          sk_BY_DIR_HASH_value(ent->hashes, idx);
442                                 }
443                         if (!hent)
444                                 {
445                                 hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
446                                 hent->hash = h;
447                                 hent->suffix = k;
448                                 if (!sk_BY_DIR_HASH_push(ent->hashes, hent))
449                                         {
450                                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
451                                         OPENSSL_free(hent);
452                                         ok = 0;
453                                         goto finish;
454                                         }
455                                 }
456                         else if (hent->suffix < k)
457                                 hent->suffix = k;
458
459                         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
460
461                         }
462
463                 if (tmp != NULL)
464                         {
465                         ok=1;
466                         ret->type=tmp->type;
467                         memcpy(&ret->data,&tmp->data,sizeof(ret->data));
468                         /* If we were going to up the reference count,
469                          * we would need to do it on a perl 'type'
470                          * basis */
471         /*              CRYPTO_add(&tmp->data.x509->references,1,
472                                 CRYPTO_LOCK_X509);*/
473                         goto finish;
474                         }
475                 }
476 finish:
477         if (b != NULL) BUF_MEM_free(b);
478         return(ok);
479         }
480