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source: vbox/trunk/src/libs/openssl-3.1.7/crypto/x509/by_dir.c@ 105945

最後變更 在這個檔案從105945是 104078,由 vboxsync 提交於 8 月 前

openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
檔案大小: 12.9 KB
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1/*
2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#if defined (__TANDEM) && defined (_SPT_MODEL_)
11 /*
12 * These definitions have to come first in SPT due to scoping of the
13 * declarations in c99 associated with SPT use of stat.
14 */
15# include <sys/types.h>
16# include <sys/stat.h>
17#endif
18
19#include "internal/e_os.h"
20#include "internal/cryptlib.h"
21#include <stdio.h>
22#include <time.h>
23#include <errno.h>
24#include <sys/types.h>
25
26#ifndef OPENSSL_NO_POSIX_IO
27# include <sys/stat.h>
28#endif
29
30#include <openssl/x509.h>
31#include "crypto/x509.h"
32#include "x509_local.h"
33
34struct lookup_dir_hashes_st {
35 unsigned long hash;
36 int suffix;
37};
38
39struct lookup_dir_entry_st {
40 char *dir;
41 int dir_type;
42 STACK_OF(BY_DIR_HASH) *hashes;
43};
44
45typedef struct lookup_dir_st {
46 BUF_MEM *buffer;
47 STACK_OF(BY_DIR_ENTRY) *dirs;
48 CRYPTO_RWLOCK *lock;
49} BY_DIR;
50
51static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
52 char **retp);
53
54static int new_dir(X509_LOOKUP *lu);
55static void free_dir(X509_LOOKUP *lu);
56static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
57static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
58 const X509_NAME *name, X509_OBJECT *ret);
59static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
60 const X509_NAME *name, X509_OBJECT *ret,
61 OSSL_LIB_CTX *libctx, const char *propq);
62static X509_LOOKUP_METHOD x509_dir_lookup = {
63 "Load certs from files in a directory",
64 new_dir, /* new_item */
65 free_dir, /* free */
66 NULL, /* init */
67 NULL, /* shutdown */
68 dir_ctrl, /* ctrl */
69 get_cert_by_subject, /* get_by_subject */
70 NULL, /* get_by_issuer_serial */
71 NULL, /* get_by_fingerprint */
72 NULL, /* get_by_alias */
73 get_cert_by_subject_ex, /* get_by_subject_ex */
74 NULL, /* ctrl_ex */
75};
76
77X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
78{
79 return &x509_dir_lookup;
80}
81
82static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
83 char **retp)
84{
85 int ret = 0;
86 BY_DIR *ld = (BY_DIR *)ctx->method_data;
87
88 switch (cmd) {
89 case X509_L_ADD_DIR:
90 if (argl == X509_FILETYPE_DEFAULT) {
91 const char *dir = ossl_safe_getenv(X509_get_default_cert_dir_env());
92
93 if (dir)
94 ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
95 else
96 ret = add_cert_dir(ld, X509_get_default_cert_dir(),
97 X509_FILETYPE_PEM);
98 if (!ret) {
99 ERR_raise(ERR_LIB_X509, X509_R_LOADING_CERT_DIR);
100 }
101 } else
102 ret = add_cert_dir(ld, argp, (int)argl);
103 break;
104 }
105 return ret;
106}
107
108static int new_dir(X509_LOOKUP *lu)
109{
110 BY_DIR *a = OPENSSL_malloc(sizeof(*a));
111
112 if (a == NULL) {
113 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
114 return 0;
115 }
116
117 if ((a->buffer = BUF_MEM_new()) == NULL) {
118 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
119 goto err;
120 }
121 a->dirs = NULL;
122 a->lock = CRYPTO_THREAD_lock_new();
123 if (a->lock == NULL) {
124 BUF_MEM_free(a->buffer);
125 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
126 goto err;
127 }
128 lu->method_data = a;
129 return 1;
130
131 err:
132 OPENSSL_free(a);
133 return 0;
134}
135
136static void by_dir_hash_free(BY_DIR_HASH *hash)
137{
138 OPENSSL_free(hash);
139}
140
141static int by_dir_hash_cmp(const BY_DIR_HASH *const *a,
142 const BY_DIR_HASH *const *b)
143{
144 if ((*a)->hash > (*b)->hash)
145 return 1;
146 if ((*a)->hash < (*b)->hash)
147 return -1;
148 return 0;
149}
150
151static void by_dir_entry_free(BY_DIR_ENTRY *ent)
152{
153 OPENSSL_free(ent->dir);
154 sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
155 OPENSSL_free(ent);
156}
157
158static void free_dir(X509_LOOKUP *lu)
159{
160 BY_DIR *a = (BY_DIR *)lu->method_data;
161
162 sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
163 BUF_MEM_free(a->buffer);
164 CRYPTO_THREAD_lock_free(a->lock);
165 OPENSSL_free(a);
166}
167
168static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
169{
170 int j;
171 size_t len;
172 const char *s, *ss, *p;
173
174 if (dir == NULL || *dir == '\0') {
175 ERR_raise(ERR_LIB_X509, X509_R_INVALID_DIRECTORY);
176 return 0;
177 }
178
179 s = dir;
180 p = s;
181 do {
182 if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
183 BY_DIR_ENTRY *ent;
184
185 ss = s;
186 s = p + 1;
187 len = p - ss;
188 if (len == 0)
189 continue;
190 for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
191 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
192 if (strlen(ent->dir) == len && strncmp(ent->dir, ss, len) == 0)
193 break;
194 }
195 if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
196 continue;
197 if (ctx->dirs == NULL) {
198 ctx->dirs = sk_BY_DIR_ENTRY_new_null();
199 if (!ctx->dirs) {
200 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
201 return 0;
202 }
203 }
204 ent = OPENSSL_malloc(sizeof(*ent));
205 if (ent == NULL) {
206 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
207 return 0;
208 }
209 ent->dir_type = type;
210 ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
211 ent->dir = OPENSSL_strndup(ss, len);
212 if (ent->dir == NULL || ent->hashes == NULL) {
213 by_dir_entry_free(ent);
214 return 0;
215 }
216 if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
217 by_dir_entry_free(ent);
218 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
219 return 0;
220 }
221 }
222 } while (*p++ != '\0');
223 return 1;
224}
225
226static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
227 const X509_NAME *name, X509_OBJECT *ret,
228 OSSL_LIB_CTX *libctx, const char *propq)
229{
230 BY_DIR *ctx;
231 union {
232 X509 st_x509;
233 X509_CRL crl;
234 } data;
235 int ok = 0;
236 int i, j, k;
237 unsigned long h;
238 BUF_MEM *b = NULL;
239 X509_OBJECT stmp, *tmp;
240 const char *postfix = "";
241
242 if (name == NULL)
243 return 0;
244
245 stmp.type = type;
246 if (type == X509_LU_X509) {
247 data.st_x509.cert_info.subject = (X509_NAME *)name; /* won't modify it */
248 stmp.data.x509 = &data.st_x509;
249 } else if (type == X509_LU_CRL) {
250 data.crl.crl.issuer = (X509_NAME *)name; /* won't modify it */
251 stmp.data.crl = &data.crl;
252 postfix = "r";
253 } else {
254 ERR_raise(ERR_LIB_X509, X509_R_WRONG_LOOKUP_TYPE);
255 goto finish;
256 }
257
258 if ((b = BUF_MEM_new()) == NULL) {
259 ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
260 goto finish;
261 }
262
263 ctx = (BY_DIR *)xl->method_data;
264 h = X509_NAME_hash_ex(name, libctx, propq, &i);
265 if (i == 0)
266 goto finish;
267 for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
268 BY_DIR_ENTRY *ent;
269 int idx;
270 BY_DIR_HASH htmp, *hent;
271
272 ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
273 j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
274 if (!BUF_MEM_grow(b, j)) {
275 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
276 goto finish;
277 }
278 if (type == X509_LU_CRL && ent->hashes) {
279 htmp.hash = h;
280 if (!CRYPTO_THREAD_read_lock(ctx->lock))
281 goto finish;
282 idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
283 if (idx >= 0) {
284 hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
285 k = hent->suffix;
286 } else {
287 hent = NULL;
288 k = 0;
289 }
290 CRYPTO_THREAD_unlock(ctx->lock);
291 } else {
292 k = 0;
293 hent = NULL;
294 }
295 for (;;) {
296 char c = '/';
297
298#ifdef OPENSSL_SYS_VMS
299 c = ent->dir[strlen(ent->dir) - 1];
300 if (c != ':' && c != '>' && c != ']') {
301 /*
302 * If no separator is present, we assume the directory
303 * specifier is a logical name, and add a colon. We really
304 * should use better VMS routines for merging things like
305 * this, but this will do for now... -- Richard Levitte
306 */
307 c = ':';
308 } else {
309 c = '\0';
310 }
311
312 if (c == '\0') {
313 /*
314 * This is special. When c == '\0', no directory separator
315 * should be added.
316 */
317 BIO_snprintf(b->data, b->max,
318 "%s%08lx.%s%d", ent->dir, h, postfix, k);
319 } else
320#endif
321 {
322 BIO_snprintf(b->data, b->max,
323 "%s%c%08lx.%s%d", ent->dir, c, h, postfix, k);
324 }
325#ifndef OPENSSL_NO_POSIX_IO
326# ifdef _WIN32
327# define stat _stat
328# endif
329 {
330 struct stat st;
331 if (stat(b->data, &st) < 0)
332 break;
333 }
334#endif
335 /* found one. */
336 if (type == X509_LU_X509) {
337 if ((X509_load_cert_file_ex(xl, b->data, ent->dir_type, libctx,
338 propq)) == 0)
339 break;
340 } else if (type == X509_LU_CRL) {
341 if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0)
342 break;
343 }
344 /* else case will caught higher up */
345 k++;
346 }
347
348 /*
349 * we have added it to the cache so now pull it out again
350 */
351 if (k > 0) {
352 if (!X509_STORE_lock(xl->store_ctx))
353 goto finish;
354 j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
355 tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
356 X509_STORE_unlock(xl->store_ctx);
357 } else {
358 j = -1;
359 tmp = NULL;
360 }
361 /*
362 * If a CRL, update the last file suffix added for this.
363 * We don't need to add an entry if k is 0 as this is the initial value.
364 * This avoids the need for a write lock and sort operation in the
365 * simple case where no CRL is present for a hash.
366 */
367 if (type == X509_LU_CRL && k > 0) {
368 if (!CRYPTO_THREAD_write_lock(ctx->lock))
369 goto finish;
370 /*
371 * Look for entry again in case another thread added an entry
372 * first.
373 */
374 if (hent == NULL) {
375 htmp.hash = h;
376 idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
377 hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
378 }
379 if (hent == NULL) {
380 hent = OPENSSL_malloc(sizeof(*hent));
381 if (hent == NULL) {
382 CRYPTO_THREAD_unlock(ctx->lock);
383 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
384 ok = 0;
385 goto finish;
386 }
387 hent->hash = h;
388 hent->suffix = k;
389 if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
390 CRYPTO_THREAD_unlock(ctx->lock);
391 OPENSSL_free(hent);
392 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
393 ok = 0;
394 goto finish;
395 }
396
397 /*
398 * Ensure stack is sorted so that subsequent sk_BY_DIR_HASH_find
399 * will not mutate the stack and therefore require a write lock.
400 */
401 sk_BY_DIR_HASH_sort(ent->hashes);
402 } else if (hent->suffix < k) {
403 hent->suffix = k;
404 }
405
406 CRYPTO_THREAD_unlock(ctx->lock);
407
408 }
409
410 if (tmp != NULL) {
411 ok = 1;
412 ret->type = tmp->type;
413 memcpy(&ret->data, &tmp->data, sizeof(ret->data));
414
415 /*
416 * Clear any errors that might have been raised processing empty
417 * or malformed files.
418 */
419 ERR_clear_error();
420
421 goto finish;
422 }
423 }
424 finish:
425 BUF_MEM_free(b);
426 return ok;
427}
428
429static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
430 const X509_NAME *name, X509_OBJECT *ret)
431{
432 return get_cert_by_subject_ex(xl, type, name, ret, NULL, NULL);
433}
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