GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/x509/by_dir.c Lines: 47 160 29.4 %
Date: 2017-11-13 Branches: 26 108 24.1 %

Line Branch Exec Source
1
/* $OpenBSD: by_dir.c,v 1.38 2017/01/29 17:49:23 beck Exp $ */
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 <sys/types.h>
60
61
#include <errno.h>
62
#include <stdio.h>
63
#include <string.h>
64
#include <time.h>
65
#include <unistd.h>
66
67
#include <openssl/opensslconf.h>
68
69
#include <openssl/err.h>
70
#include <openssl/lhash.h>
71
#include <openssl/x509.h>
72
73
# include <sys/stat.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
102
static X509_LOOKUP_METHOD x509_dir_lookup = {
103
	.name = "Load certs from files in a directory",
104
	.new_item = new_dir,
105
	.free = free_dir,
106
	.init = NULL,
107
	.shutdown = NULL,
108
	.ctrl = dir_ctrl,
109
	.get_by_subject = get_cert_by_subject,
110
	.get_by_issuer_serial = NULL,
111
	.get_by_fingerprint = NULL,
112
	.get_by_alias = NULL,
113
};
114
115
X509_LOOKUP_METHOD *
116
X509_LOOKUP_hash_dir(void)
117
{
118
178
	return (&x509_dir_lookup);
119
}
120
121
static int
122
dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
123
    char **retp)
124
{
125
	int ret = 0;
126
	BY_DIR *ld;
127
128
178
	ld = (BY_DIR *)ctx->method_data;
129
130
89
	switch (cmd) {
131
	case X509_L_ADD_DIR:
132
89
		if (argl == X509_FILETYPE_DEFAULT) {
133
89
			ret = add_cert_dir(ld, X509_get_default_cert_dir(),
134
			    X509_FILETYPE_PEM);
135
89
			if (!ret) {
136
				X509error(X509_R_LOADING_CERT_DIR);
137
			}
138
		} else
139
			ret = add_cert_dir(ld, argp, (int)argl);
140
		break;
141
	}
142
89
	return (ret);
143
}
144
145
static int
146
new_dir(X509_LOOKUP *lu)
147
{
148
	BY_DIR *a;
149
150
178
	if ((a = malloc(sizeof(BY_DIR))) == NULL)
151
		return (0);
152
89
	if ((a->buffer = BUF_MEM_new()) == NULL) {
153
		free(a);
154
		return (0);
155
	}
156
89
	a->dirs = NULL;
157
89
	lu->method_data = (char *)a;
158
89
	return (1);
159
89
}
160
161
static void
162
by_dir_hash_free(BY_DIR_HASH *hash)
163
{
164
	free(hash);
165
}
166
167
static int
168
by_dir_hash_cmp(const BY_DIR_HASH * const *a,
169
    const BY_DIR_HASH * const *b)
170
{
171
	if ((*a)->hash > (*b)->hash)
172
		return 1;
173
	if ((*a)->hash < (*b)->hash)
174
		return -1;
175
	return 0;
176
}
177
178
static void
179
by_dir_entry_free(BY_DIR_ENTRY *ent)
180
{
181
178
	free(ent->dir);
182
89
	if (ent->hashes)
183
89
		sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
184
89
	free(ent);
185
89
}
186
187
static void
188
free_dir(X509_LOOKUP *lu)
189
{
190
	BY_DIR *a;
191
192
178
	a = (BY_DIR *)lu->method_data;
193
89
	if (a->dirs != NULL)
194
89
		sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
195
89
	if (a->buffer != NULL)
196
89
		BUF_MEM_free(a->buffer);
197
89
	free(a);
198
89
}
199
200
static int
201
add_cert_dir(BY_DIR *ctx, const char *dir, int type)
202
{
203
	int j;
204
	const char *s, *ss, *p;
205
	ptrdiff_t len;
206
207

267
	if (dir == NULL || !*dir) {
208
		X509error(X509_R_INVALID_DIRECTORY);
209
		return 0;
210
	}
211
212
	s = dir;
213
	p = s;
214
89
	do {
215

2670
		if ((*p == ':') || (*p == '\0')) {
216
			BY_DIR_ENTRY *ent;
217
			ss = s;
218
89
			s = p + 1;
219
89
			len = p - ss;
220
89
			if (len == 0)
221
				continue;
222
178
			for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
223
				ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
224
				if (strlen(ent->dir) == (size_t)len &&
225
				    strncmp(ent->dir, ss, (size_t)len) == 0)
226
					break;
227
			}
228
89
			if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
229
				continue;
230
89
			if (ctx->dirs == NULL) {
231
89
				ctx->dirs = sk_BY_DIR_ENTRY_new_null();
232
89
				if (!ctx->dirs) {
233
					X509error(ERR_R_MALLOC_FAILURE);
234
					return 0;
235
				}
236
			}
237
89
			ent = malloc(sizeof(BY_DIR_ENTRY));
238
89
			if (!ent) {
239
				X509error(ERR_R_MALLOC_FAILURE);
240
				return 0;
241
			}
242
89
			ent->dir_type = type;
243
89
			ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
244
89
			ent->dir = strndup(ss, (size_t)len);
245

178
			if (!ent->dir || !ent->hashes) {
246
				X509error(ERR_R_MALLOC_FAILURE);
247
				by_dir_entry_free(ent);
248
				return 0;
249
			}
250
89
			if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
251
				X509error(ERR_R_MALLOC_FAILURE);
252
				by_dir_entry_free(ent);
253
				return 0;
254
			}
255
89
		}
256
1335
	} while (*p++ != '\0');
257
89
	return 1;
258
89
}
259
260
static int
261
get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
262
    X509_OBJECT *ret)
263
{
264
	BY_DIR *ctx;
265
	union	{
266
		struct	{
267
			X509 st_x509;
268
			X509_CINF st_x509_cinf;
269
		} x509;
270
		struct	{
271
			X509_CRL st_crl;
272
			X509_CRL_INFO st_crl_info;
273
		} crl;
274
	} data;
275
	int ok = 0;
276
	int i, j, k;
277
	unsigned long h;
278
	BUF_MEM *b = NULL;
279
	X509_OBJECT stmp, *tmp;
280
	const char *postfix="";
281
282
	if (name == NULL)
283
		return (0);
284
285
	stmp.type = type;
286
	if (type == X509_LU_X509) {
287
		data.x509.st_x509.cert_info = &data.x509.st_x509_cinf;
288
		data.x509.st_x509_cinf.subject = name;
289
		stmp.data.x509 = &data.x509.st_x509;
290
		postfix="";
291
	} else if (type == X509_LU_CRL) {
292
		data.crl.st_crl.crl = &data.crl.st_crl_info;
293
		data.crl.st_crl_info.issuer = name;
294
		stmp.data.crl = &data.crl.st_crl;
295
		postfix="r";
296
	} else {
297
		X509error(X509_R_WRONG_LOOKUP_TYPE);
298
		goto finish;
299
	}
300
301
	if ((b = BUF_MEM_new()) == NULL) {
302
		X509error(ERR_R_BUF_LIB);
303
		goto finish;
304
	}
305
306
	ctx = (BY_DIR *)xl->method_data;
307
308
	h = X509_NAME_hash(name);
309
	for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
310
		BY_DIR_ENTRY *ent;
311
		int idx;
312
		BY_DIR_HASH htmp, *hent;
313
		ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
314
		j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
315
		if (!BUF_MEM_grow(b, j)) {
316
			X509error(ERR_R_MALLOC_FAILURE);
317
			goto finish;
318
		}
319
		if (type == X509_LU_CRL && ent->hashes) {
320
			htmp.hash = h;
321
			CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
322
			idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
323
			if (idx >= 0) {
324
				hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
325
				k = hent->suffix;
326
			} else {
327
				hent = NULL;
328
				k = 0;
329
			}
330
			CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
331
		} else {
332
			k = 0;
333
			hent = NULL;
334
		}
335
		for (;;) {
336
			(void) snprintf(b->data, b->max, "%s/%08lx.%s%d",
337
			    ent->dir, h, postfix, k);
338
339
			{
340
				struct stat st;
341
				if (stat(b->data, &st) < 0)
342
					break;
343
			}
344
			/* found one. */
345
			if (type == X509_LU_X509) {
346
				if ((X509_load_cert_file(xl, b->data,
347
				    ent->dir_type)) == 0)
348
					break;
349
			} else if (type == X509_LU_CRL) {
350
				if ((X509_load_crl_file(xl, b->data,
351
				    ent->dir_type)) == 0)
352
					break;
353
			}
354
			/* else case will caught higher up */
355
			k++;
356
		}
357
358
		/* we have added it to the cache so now pull it out again */
359
		CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
360
		j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
361
		if (j != -1)
362
			tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
363
		else
364
			tmp = NULL;
365
		CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
366
367
		/* If a CRL, update the last file suffix added for this */
368
		if (type == X509_LU_CRL) {
369
			CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
370
			/*
371
			 * Look for entry again in case another thread added
372
			 * an entry first.
373
			 */
374
			if (!hent) {
375
				htmp.hash = h;
376
				idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
377
				if (idx >= 0)
378
					hent = sk_BY_DIR_HASH_value(
379
					    ent->hashes, idx);
380
			}
381
			if (!hent) {
382
				hent = malloc(sizeof(BY_DIR_HASH));
383
				if (!hent) {
384
					X509error(ERR_R_MALLOC_FAILURE);
385
					CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
386
					ok = 0;
387
					goto finish;
388
				}
389
				hent->hash = h;
390
				hent->suffix = k;
391
				if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
392
					X509error(ERR_R_MALLOC_FAILURE);
393
					CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
394
					free(hent);
395
					ok = 0;
396
					goto finish;
397
				}
398
			} else if (hent->suffix < k)
399
				hent->suffix = k;
400
401
			CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
402
403
		}
404
405
		if (tmp != NULL) {
406
			ok = 1;
407
			ret->type = tmp->type;
408
			memcpy(&ret->data, &tmp->data, sizeof(ret->data));
409
			/*
410
			 * If we were going to up the reference count,
411
			 * we would need to do it on a perl 'type' basis
412
			 */
413
	/*		CRYPTO_add(&tmp->data.x509->references,1,
414
				CRYPTO_LOCK_X509);*/
415
			goto finish;
416
		}
417
	}
418
finish:
419
	if (b != NULL)
420
		BUF_MEM_free(b);
421
	return (ok);
422
}