Line data Source code
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 : typedef struct lookup_dir_hashes_st {
76 : unsigned long hash;
77 : int suffix;
78 : } BY_DIR_HASH;
79 :
80 : typedef struct lookup_dir_entry_st {
81 : char *dir;
82 : int dir_type;
83 : STACK_OF(BY_DIR_HASH) *hashes;
84 : } BY_DIR_ENTRY;
85 :
86 : typedef struct lookup_dir_st {
87 : BUF_MEM *buffer;
88 : STACK_OF(BY_DIR_ENTRY) *dirs;
89 : } BY_DIR;
90 :
91 : DECLARE_STACK_OF(BY_DIR_HASH)
92 : DECLARE_STACK_OF(BY_DIR_ENTRY)
93 :
94 : static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
95 : char **ret);
96 : static int new_dir(X509_LOOKUP *lu);
97 : static void free_dir(X509_LOOKUP *lu);
98 : static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
99 : static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
100 : X509_OBJECT *ret);
101 : X509_LOOKUP_METHOD x509_dir_lookup = {
102 : "Load certs from files in a directory",
103 : new_dir, /* new */
104 : free_dir, /* free */
105 : NULL, /* init */
106 : NULL, /* shutdown */
107 : dir_ctrl, /* ctrl */
108 : get_cert_by_subject, /* get_by_subject */
109 : NULL, /* get_by_issuer_serial */
110 : NULL, /* get_by_fingerprint */
111 : NULL, /* get_by_alias */
112 : };
113 :
114 0 : X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
115 : {
116 0 : return (&x509_dir_lookup);
117 : }
118 :
119 0 : static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
120 : char **retp)
121 : {
122 : int ret = 0;
123 : BY_DIR *ld;
124 : char *dir = NULL;
125 :
126 0 : ld = (BY_DIR *)ctx->method_data;
127 :
128 0 : switch (cmd) {
129 : case X509_L_ADD_DIR:
130 0 : if (argl == X509_FILETYPE_DEFAULT) {
131 0 : dir = (char *)getenv(X509_get_default_cert_dir_env());
132 0 : if (dir)
133 0 : ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
134 : else
135 0 : ret = add_cert_dir(ld, X509_get_default_cert_dir(),
136 : X509_FILETYPE_PEM);
137 0 : if (!ret) {
138 0 : X509err(X509_F_DIR_CTRL, X509_R_LOADING_CERT_DIR);
139 : }
140 : } else
141 0 : ret = add_cert_dir(ld, argp, (int)argl);
142 : break;
143 : }
144 0 : return (ret);
145 : }
146 :
147 0 : static int new_dir(X509_LOOKUP *lu)
148 : {
149 : BY_DIR *a;
150 :
151 0 : if ((a = (BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
152 : return (0);
153 0 : if ((a->buffer = BUF_MEM_new()) == NULL) {
154 0 : OPENSSL_free(a);
155 0 : return (0);
156 : }
157 0 : a->dirs = NULL;
158 0 : lu->method_data = (char *)a;
159 0 : return (1);
160 : }
161 :
162 0 : static void by_dir_hash_free(BY_DIR_HASH *hash)
163 : {
164 0 : OPENSSL_free(hash);
165 0 : }
166 :
167 0 : static int by_dir_hash_cmp(const BY_DIR_HASH *const *a,
168 : const BY_DIR_HASH *const *b)
169 : {
170 0 : if ((*a)->hash > (*b)->hash)
171 : return 1;
172 0 : if ((*a)->hash < (*b)->hash)
173 : return -1;
174 0 : return 0;
175 : }
176 :
177 0 : static void by_dir_entry_free(BY_DIR_ENTRY *ent)
178 : {
179 0 : if (ent->dir)
180 0 : OPENSSL_free(ent->dir);
181 0 : if (ent->hashes)
182 0 : sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
183 0 : OPENSSL_free(ent);
184 0 : }
185 :
186 0 : static void free_dir(X509_LOOKUP *lu)
187 : {
188 : BY_DIR *a;
189 :
190 0 : a = (BY_DIR *)lu->method_data;
191 0 : if (a->dirs != NULL)
192 0 : sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
193 0 : if (a->buffer != NULL)
194 0 : BUF_MEM_free(a->buffer);
195 0 : OPENSSL_free(a);
196 0 : }
197 :
198 0 : static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
199 : {
200 : int j, len;
201 : const char *s, *ss, *p;
202 :
203 0 : if (dir == NULL || !*dir) {
204 0 : X509err(X509_F_ADD_CERT_DIR, X509_R_INVALID_DIRECTORY);
205 : return 0;
206 : }
207 :
208 : s = dir;
209 : p = s;
210 : do {
211 0 : if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
212 : BY_DIR_ENTRY *ent;
213 : ss = s;
214 0 : s = p + 1;
215 0 : len = (int)(p - ss);
216 0 : if (len == 0)
217 0 : continue;
218 0 : for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
219 0 : ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
220 0 : if (strlen(ent->dir) == (size_t)len &&
221 0 : strncmp(ent->dir, ss, (unsigned int)len) == 0)
222 : break;
223 : }
224 0 : if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
225 0 : continue;
226 0 : if (ctx->dirs == NULL) {
227 0 : ctx->dirs = sk_BY_DIR_ENTRY_new_null();
228 0 : if (!ctx->dirs) {
229 0 : X509err(X509_F_ADD_CERT_DIR, ERR_R_MALLOC_FAILURE);
230 : return 0;
231 : }
232 : }
233 0 : ent = OPENSSL_malloc(sizeof(BY_DIR_ENTRY));
234 0 : if (!ent)
235 : return 0;
236 0 : ent->dir_type = type;
237 0 : ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
238 0 : ent->dir = OPENSSL_malloc((unsigned int)len + 1);
239 0 : if (!ent->dir || !ent->hashes) {
240 0 : by_dir_entry_free(ent);
241 : return 0;
242 : }
243 0 : strncpy(ent->dir, ss, (unsigned int)len);
244 0 : ent->dir[len] = '\0';
245 0 : if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
246 0 : by_dir_entry_free(ent);
247 : return 0;
248 : }
249 : }
250 0 : } while (*p++ != '\0');
251 : return 1;
252 : }
253 :
254 0 : static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
255 : X509_OBJECT *ret)
256 : {
257 : BY_DIR *ctx;
258 : union {
259 : struct {
260 : X509 st_x509;
261 : X509_CINF st_x509_cinf;
262 : } x509;
263 : struct {
264 : X509_CRL st_crl;
265 : X509_CRL_INFO st_crl_info;
266 : } crl;
267 : } data;
268 : int ok = 0;
269 : int i, j, k;
270 : unsigned long h;
271 : BUF_MEM *b = NULL;
272 : X509_OBJECT stmp, *tmp;
273 : const char *postfix = "";
274 :
275 0 : if (name == NULL)
276 : return (0);
277 :
278 0 : stmp.type = type;
279 0 : if (type == X509_LU_X509) {
280 0 : data.x509.st_x509.cert_info = &data.x509.st_x509_cinf;
281 0 : data.x509.st_x509_cinf.subject = name;
282 0 : stmp.data.x509 = &data.x509.st_x509;
283 : postfix = "";
284 0 : } else if (type == X509_LU_CRL) {
285 0 : data.crl.st_crl.crl = &data.crl.st_crl_info;
286 0 : data.crl.st_crl_info.issuer = name;
287 0 : stmp.data.crl = &data.crl.st_crl;
288 : postfix = "r";
289 : } else {
290 0 : X509err(X509_F_GET_CERT_BY_SUBJECT, X509_R_WRONG_LOOKUP_TYPE);
291 0 : goto finish;
292 : }
293 :
294 0 : if ((b = BUF_MEM_new()) == NULL) {
295 0 : X509err(X509_F_GET_CERT_BY_SUBJECT, ERR_R_BUF_LIB);
296 0 : goto finish;
297 : }
298 :
299 0 : ctx = (BY_DIR *)xl->method_data;
300 :
301 0 : h = X509_NAME_hash(name);
302 0 : for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
303 : BY_DIR_ENTRY *ent;
304 : int idx;
305 : BY_DIR_HASH htmp, *hent;
306 0 : ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
307 0 : j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
308 0 : if (!BUF_MEM_grow(b, j)) {
309 0 : X509err(X509_F_GET_CERT_BY_SUBJECT, ERR_R_MALLOC_FAILURE);
310 0 : goto finish;
311 : }
312 0 : if (type == X509_LU_CRL && ent->hashes) {
313 0 : htmp.hash = h;
314 0 : CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
315 0 : idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
316 0 : if (idx >= 0) {
317 0 : hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
318 0 : k = hent->suffix;
319 : } else {
320 : hent = NULL;
321 : k = 0;
322 : }
323 0 : CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
324 : } else {
325 : k = 0;
326 : hent = NULL;
327 : }
328 : for (;;) {
329 : char c = '/';
330 : #ifdef OPENSSL_SYS_VMS
331 : c = ent->dir[strlen(ent->dir) - 1];
332 : if (c != ':' && c != '>' && c != ']') {
333 : /*
334 : * If no separator is present, we assume the directory
335 : * specifier is a logical name, and add a colon. We really
336 : * should use better VMS routines for merging things like
337 : * this, but this will do for now... -- Richard Levitte
338 : */
339 : c = ':';
340 : } else {
341 : c = '\0';
342 : }
343 : #endif
344 : if (c == '\0') {
345 : /*
346 : * This is special. When c == '\0', no directory separator
347 : * should be added.
348 : */
349 : BIO_snprintf(b->data, b->max,
350 : "%s%08lx.%s%d", ent->dir, h, postfix, k);
351 : } else {
352 0 : BIO_snprintf(b->data, b->max,
353 : "%s%c%08lx.%s%d", ent->dir, c, h, postfix, k);
354 : }
355 : #ifndef OPENSSL_NO_POSIX_IO
356 : # ifdef _WIN32
357 : # define stat _stat
358 : # endif
359 : {
360 : struct stat st;
361 0 : if (stat(b->data, &st) < 0)
362 : break;
363 : }
364 : #endif
365 : /* found one. */
366 0 : if (type == X509_LU_X509) {
367 0 : if ((X509_load_cert_file(xl, b->data, ent->dir_type)) == 0)
368 : break;
369 0 : } else if (type == X509_LU_CRL) {
370 0 : if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0)
371 : break;
372 : }
373 : /* else case will caught higher up */
374 0 : k++;
375 0 : }
376 :
377 : /*
378 : * we have added it to the cache so now pull it out again
379 : */
380 0 : CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
381 0 : j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
382 0 : if (j != -1)
383 0 : tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
384 : else
385 : tmp = NULL;
386 0 : CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
387 :
388 : /* If a CRL, update the last file suffix added for this */
389 :
390 0 : if (type == X509_LU_CRL) {
391 0 : CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
392 : /*
393 : * Look for entry again in case another thread added an entry
394 : * first.
395 : */
396 0 : if (!hent) {
397 0 : htmp.hash = h;
398 0 : idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
399 0 : if (idx >= 0)
400 0 : hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
401 : }
402 0 : if (!hent) {
403 0 : hent = OPENSSL_malloc(sizeof(BY_DIR_HASH));
404 0 : hent->hash = h;
405 0 : hent->suffix = k;
406 0 : if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
407 0 : CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
408 0 : OPENSSL_free(hent);
409 : ok = 0;
410 0 : goto finish;
411 : }
412 0 : } else if (hent->suffix < k)
413 0 : hent->suffix = k;
414 :
415 0 : CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
416 :
417 : }
418 :
419 0 : if (tmp != NULL) {
420 : ok = 1;
421 0 : ret->type = tmp->type;
422 0 : memcpy(&ret->data, &tmp->data, sizeof(ret->data));
423 : /*
424 : * If we were going to up the reference count, we would need to
425 : * do it on a perl 'type' basis
426 : */
427 : /*- CRYPTO_add(&tmp->data.x509->references,1,
428 : CRYPTO_LOCK_X509);*/
429 : goto finish;
430 : }
431 : }
432 : finish:
433 0 : if (b != NULL)
434 0 : BUF_MEM_free(b);
435 0 : return (ok);
436 : }
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