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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 unsigned long hash_array[2]; | |
291 int hash_index; | |
292 BUF_MEM *b=NULL; | |
293 X509_OBJECT stmp,*tmp; | |
294 const char *postfix=""; | |
295 | |
296 if (name == NULL) return(0); | |
297 | |
298 stmp.type=type; | |
299 if (type == X509_LU_X509) | |
300 { | |
301 data.x509.st_x509.cert_info= &data.x509.st_x509_cinf; | |
302 data.x509.st_x509_cinf.subject=name; | |
303 stmp.data.x509= &data.x509.st_x509; | |
304 postfix=""; | |
305 } | |
306 else if (type == X509_LU_CRL) | |
307 { | |
308 data.crl.st_crl.crl= &data.crl.st_crl_info; | |
309 data.crl.st_crl_info.issuer=name; | |
310 stmp.data.crl= &data.crl.st_crl; | |
311 postfix="r"; | |
312 } | |
313 else | |
314 { | |
315 X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE); | |
316 goto finish; | |
317 } | |
318 | |
319 if ((b=BUF_MEM_new()) == NULL) | |
320 { | |
321 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB); | |
322 goto finish; | |
323 } | |
324 | |
325 ctx=(BY_DIR *)xl->method_data; | |
326 | |
327 hash_array[0]=X509_NAME_hash(name); | |
328 hash_array[1]=X509_NAME_hash_old(name); | |
329 for (hash_index=0; hash_index < 2; ++hash_index) | |
330 { | |
331 h=hash_array[hash_index]; | |
332 for (i=0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) | |
333 { | |
334 BY_DIR_ENTRY *ent; | |
335 int idx; | |
336 BY_DIR_HASH htmp, *hent; | |
337 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i); | |
338 j=strlen(ent->dir)+1+8+6+1+1; | |
339 if (!BUF_MEM_grow(b,j)) | |
340 { | |
341 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE)
; | |
342 goto finish; | |
343 } | |
344 if (type == X509_LU_CRL && ent->hashes) | |
345 { | |
346 htmp.hash = h; | |
347 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE); | |
348 idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp); | |
349 if (idx >= 0) | |
350 { | |
351 hent = sk_BY_DIR_HASH_value(ent->hashes, idx); | |
352 k = hent->suffix; | |
353 } | |
354 else | |
355 { | |
356 hent = NULL; | |
357 k=0; | |
358 } | |
359 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE); | |
360 } | |
361 else | |
362 { | |
363 k = 0; | |
364 hent = NULL; | |
365 } | |
366 for (;;) | |
367 { | |
368 char c = '/'; | |
369 #ifdef OPENSSL_SYS_VMS | |
370 c = ent->dir[strlen(ent->dir)-1]; | |
371 if (c != ':' && c != '>' && c != ']') | |
372 { | |
373 /* If no separator is present, we assume the | |
374 directory specifier is a logical name, and | |
375 add a colon. We really should use better | |
376 VMS routines for merging things like this, | |
377 but this will do for now... | |
378 -- Richard Levitte */ | |
379 c = ':'; | |
380 } | |
381 else | |
382 { | |
383 c = '\0'; | |
384 } | |
385 #endif | |
386 if (c == '\0') | |
387 { | |
388 /* This is special. When c == '\0', no | |
389 directory separator should be added. */ | |
390 BIO_snprintf(b->data,b->max, | |
391 "%s%08lx.%s%d",ent->dir,h, | |
392 postfix,k); | |
393 } | |
394 else | |
395 { | |
396 BIO_snprintf(b->data,b->max, | |
397 "%s%c%08lx.%s%d",ent->dir,c,h, | |
398 postfix,k); | |
399 } | |
400 #ifndef OPENSSL_NO_POSIX_IO | |
401 #ifdef _WIN32 | |
402 #define stat _stat | |
403 #endif | |
404 { | |
405 struct stat st; | |
406 if (stat(b->data,&st) < 0) | |
407 break; | |
408 } | |
409 #endif | |
410 /* found one. */ | |
411 if (type == X509_LU_X509) | |
412 { | |
413 if ((X509_load_cert_file(xl,b->data, | |
414 ent->dir_type)) == 0) | |
415 break; | |
416 } | |
417 else if (type == X509_LU_CRL) | |
418 { | |
419 if ((X509_load_crl_file(xl,b->data, | |
420 ent->dir_type)) == 0) | |
421 break; | |
422 } | |
423 /* else case will caught higher up */ | |
424 k++; | |
425 } | |
426 | |
427 /* we have added it to the cache so now pull | |
428 * it out again */ | |
429 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); | |
430 j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp); | |
431 if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j); | |
432 else tmp = NULL; | |
433 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); | |
434 | |
435 | |
436 /* If a CRL, update the last file suffix added for this */ | |
437 | |
438 if (type == X509_LU_CRL) | |
439 { | |
440 CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE); | |
441 /* Look for entry again in case another thread added | |
442 * an entry first. | |
443 */ | |
444 if (!hent) | |
445 { | |
446 htmp.hash = h; | |
447 idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp); | |
448 if (idx >= 0) | |
449 hent = | |
450 sk_BY_DIR_HASH_value(ent->hashes, idx); | |
451 } | |
452 if (!hent) | |
453 { | |
454 hent = OPENSSL_malloc(sizeof(BY_DIR_HASH)); | |
455 hent->hash = h; | |
456 hent->suffix = k; | |
457 if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) | |
458 { | |
459 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); | |
460 OPENSSL_free(hent); | |
461 ok = 0; | |
462 goto finish; | |
463 } | |
464 } | |
465 else if (hent->suffix < k) | |
466 hent->suffix = k; | |
467 | |
468 CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE); | |
469 | |
470 } | |
471 | |
472 if (tmp != NULL) | |
473 { | |
474 ok=1; | |
475 ret->type=tmp->type; | |
476 memcpy(&ret->data,&tmp->data,sizeof(ret->data)); | |
477 /* If we were going to up the reference count, | |
478 * we would need to do it on a perl 'type' | |
479 * basis */ | |
480 /* CRYPTO_add(&tmp->data.x509->references,1, | |
481 CRYPTO_LOCK_X509);*/ | |
482 goto finish; | |
483 } | |
484 } | |
485 } | |
486 finish: | |
487 if (b != NULL) BUF_MEM_free(b); | |
488 return(ok); | |
489 } | |
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