blob: 672a42a2e96841deaf5213fca076b2f4a5010a16 [file] [log] [blame]
Timo Teras8f6f1442015-05-07 12:48:47 -04001/*
2 * C implementation based on the original Perl and shell versions
3 *
4 * Copyright (c) 2013-2014 Timo Teräs <timo.teras@iki.fi>
5 * All rights reserved.
6 */
7/* ====================================================================
8 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * 3. All advertising materials mentioning features or use of this
23 * software must display the following acknowledgment:
24 * "This product includes software developed by the OpenSSL Project
25 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 *
27 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
28 * endorse or promote products derived from this software without
29 * prior written permission. For written permission, please contact
30 * licensing@OpenSSL.org.
31 *
32 * 5. Products derived from this software may not be called "OpenSSL"
33 * nor may "OpenSSL" appear in their names without prior written
34 * permission of the OpenSSL Project.
35 *
36 * 6. Redistributions of any form whatsoever must retain the following
37 * acknowledgment:
38 * "This product includes software developed by the OpenSSL Project
39 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
42 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
44 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
47 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
48 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
50 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
51 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
52 * OF THE POSSIBILITY OF SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This product includes cryptographic software written by Eric Young
56 * (eay@cryptsoft.com). This product includes software written by Tim
57 * Hudson (tjh@cryptsoft.com).
58 *
59 */
60
61#include "apps.h"
62
63#ifdef unix
64# include <unistd.h>
65# include <stdio.h>
66# include <limits.h>
67# include <errno.h>
68# include <string.h>
69# include <ctype.h>
70# include <sys/stat.h>
71
72# include "internal/o_dir.h"
73# include <openssl/evp.h>
74# include <openssl/pem.h>
75# include <openssl/x509.h>
76
77
78# define MAX_COLLISIONS 256
79
80typedef struct hentry_st {
81 struct hentry_st *next;
82 char *filename;
83 unsigned short old_id;
84 unsigned char need_symlink;
85 unsigned char digest[EVP_MAX_MD_SIZE];
86} HENTRY;
87
88typedef struct bucket_st {
89 struct bucket_st *next;
90 HENTRY *first_entry, *last_entry;
91 unsigned int hash;
92 unsigned short type;
93 unsigned short num_needed;
94} BUCKET;
95
96enum Type {
97 /* Keep in sync with |suffixes|, below. */
98 TYPE_CERT=0, TYPE_CRL=1
99};
100
101enum Hash {
102 HASH_OLD, HASH_NEW, HASH_BOTH
103};
104
105
106static int evpmdsize;
107static const EVP_MD *evpmd;
108static int remove_links = 1;
109static int verbose = 0;
110static BUCKET *hash_table[257];
111
112static const char *suffixes[] = { "", "r" };
113static const char *extensions[] = { "pem", "crt", "cer", "crl" };
114
115
116static void bit_set(unsigned char *set, unsigned int bit)
117{
118 set[bit >> 3] |= 1 << (bit & 0x7);
119}
120
121static int bit_isset(unsigned char *set, unsigned int bit)
122{
123 return set[bit >> 3] & (1 << (bit & 0x7));
124}
125
126
127static void add_entry(enum Type type, unsigned int hash, const char *filename,
128 const unsigned char *digest, int need_symlink,
129 unsigned short old_id)
130{
131 static BUCKET nilbucket;
132 static HENTRY nilhentry;
133 BUCKET *bp;
134 HENTRY *ep, *found = NULL;
135 unsigned int ndx = (type + hash) % OSSL_NELEM(hash_table);
136
137 for (bp = hash_table[ndx]; bp; bp = bp->next)
138 if (bp->type == type && bp->hash == hash)
139 break;
140 if (bp == NULL) {
141 bp = app_malloc(sizeof(*bp), "hash bucket");
142 *bp = nilbucket;
143 bp->next = hash_table[ndx];
144 bp->type = type;
145 bp->hash = hash;
146 hash_table[ndx] = bp;
147 }
148
149 for (ep = bp->first_entry; ep; ep = ep->next) {
150 if (digest && memcmp(digest, ep->digest, evpmdsize) == 0) {
151 BIO_printf(bio_err,
152 "%s: skipping duplicate certificate in %s\n",
153 opt_getprog(), filename);
154 return;
155 }
156 if (strcmp(filename, ep->filename) == 0) {
157 found = ep;
158 if (digest == NULL)
159 break;
160 }
161 }
162 ep = found;
163 if (ep == NULL) {
164 if (bp->num_needed >= MAX_COLLISIONS)
165 return;
166 ep = app_malloc(sizeof(*ep), "collision bucket");
167 *ep = nilhentry;
168 ep->old_id = ~0;
169 ep->filename = BUF_strdup(filename);
170 if (bp->last_entry)
171 bp->last_entry->next = ep;
172 if (bp->first_entry == NULL)
173 bp->first_entry = ep;
174 bp->last_entry = ep;
175 }
176
177 if (old_id < ep->old_id)
178 ep->old_id = old_id;
179 if (need_symlink && !ep->need_symlink) {
180 ep->need_symlink = 1;
181 bp->num_needed++;
182 memcpy(ep->digest, digest, evpmdsize);
183 }
184}
185
186static int handle_symlink(const char *filename, const char *fullpath)
187{
188 unsigned int hash = 0;
189 int i, type, id;
190 unsigned char ch;
191 char linktarget[NAME_MAX], *endptr;
192 ssize_t n;
193
194 for (i = 0; i < 8; i++) {
195 ch = filename[i];
196 if (!isxdigit(ch))
197 return -1;
198 hash <<= 4;
199 hash += app_hex(ch);
200 }
201 if (filename[i++] != '.')
202 return -1;
203 for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--)
204 if (strcasecmp(suffixes[type], &filename[i]) == 0)
205 break;
206 i += strlen(suffixes[type]);
207
208 id = strtoul(&filename[i], &endptr, 10);
209 if (*endptr != '\0')
210 return -1;
211
212 n = readlink(fullpath, linktarget, sizeof(linktarget));
213 if (n < 0 || n >= (int)sizeof(linktarget))
214 return -1;
215 linktarget[n] = 0;
216
217 add_entry(type, hash, linktarget, NULL, 0, id);
218 return 0;
219}
220
221static int do_file(const char *filename, const char *fullpath, enum Hash h)
222{
223 STACK_OF (X509_INFO) *inf;
224 X509_INFO *x;
225 X509_NAME *name = NULL;
226 BIO *b;
227 const char *ext;
228 unsigned char digest[EVP_MAX_MD_SIZE];
229 int i, type, ret = -1;
230
231 if ((ext = strrchr(filename, '.')) == NULL)
232 return 0;
233 for (i = 0; i < (int)OSSL_NELEM(extensions); i++) {
234 if (strcasecmp(extensions[i], ext + 1) == 0)
235 break;
236 }
237 if (i >= (int)OSSL_NELEM(extensions))
238 return -1;
239
240 if ((b = BIO_new_file(fullpath, "r")) == NULL)
241 return -1;
242 inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
243 BIO_free(b);
244 if (inf == NULL)
245 return -1;
246
247 if (sk_X509_INFO_num(inf) != 1) {
248 BIO_printf(bio_err,
249 "%s: skipping %s,"
250 "it does not contain exactly one certificate or CRL\n",
251 opt_getprog(), filename);
252 goto end;
253 }
254 x = sk_X509_INFO_value(inf, 0);
255 if (x->x509) {
256 type = TYPE_CERT;
257 name = X509_get_subject_name(x->x509);
258 X509_digest(x->x509, evpmd, digest, NULL);
259 } else if (x->crl) {
260 type = TYPE_CRL;
261 name = X509_CRL_get_issuer(x->crl);
262 X509_CRL_digest(x->crl, evpmd, digest, NULL);
263 }
264 if (name) {
265 if ((h == HASH_NEW) || (h == HASH_BOTH))
266 add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0);
267 if ((h == HASH_OLD) || (h == HASH_BOTH))
268 add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0);
269 }
270
271end:
272 sk_X509_INFO_pop_free(inf, X509_INFO_free);
273 return ret;
274}
275
276static int do_dir(const char *dirname, enum Hash h)
277{
278 BUCKET *bp, *nextbp;
279 HENTRY *ep, *nextep;
280 OPENSSL_DIR_CTX *d = NULL;
281 struct stat st;
282 unsigned char idmask[MAX_COLLISIONS / 8];
283 int i, n, nextid, buflen, ret = -1;
284 const char *pathsep;
285 const char *filename;
286 char *buf;
287
288 buflen = strlen(dirname);
289 pathsep = (buflen && dirname[buflen - 1] == '/') ? "" : "/";
290 buflen += NAME_MAX + 2;
291 buf = app_malloc(buflen, "filename buffer");
292
293 if (verbose)
294 BIO_printf(bio_out, "Doing %s\n", dirname);
295
296 while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) {
297 if (snprintf(buf, buflen, "%s%s%s",
298 dirname, pathsep, filename) >= buflen)
299 continue;
300 if (lstat(buf, &st) < 0)
301 continue;
302 if (S_ISLNK(st.st_mode) && handle_symlink(filename, buf) == 0)
303 continue;
304 do_file(filename, buf, h);
305 }
306 OPENSSL_DIR_end(&d);
307
308 for (i = 0; i < (int)OSSL_NELEM(hash_table); i++) {
309 for (bp = hash_table[i]; bp; bp = nextbp) {
310 nextbp = bp->next;
311 nextid = 0;
312 memset(idmask, 0, (bp->num_needed + 7) / 8);
313 for (ep = bp->first_entry; ep; ep = ep->next)
314 if (ep->old_id < bp->num_needed)
315 bit_set(idmask, ep->old_id);
316
317 for (ep = bp->first_entry; ep; ep = nextep) {
318 nextep = ep->next;
319 if (ep->old_id < bp->num_needed) {
320 /* Link exists, and is used as-is */
321 snprintf(buf, buflen, "%08x.%s%d", bp->hash,
322 suffixes[bp->type], ep->old_id);
323 if (verbose)
324 BIO_printf(bio_out, "link %s -> %s\n",
325 ep->filename, buf);
326 } else if (ep->need_symlink) {
327 /* New link needed (it may replace something) */
328 while (bit_isset(idmask, nextid))
329 nextid++;
330
331 snprintf(buf, buflen, "%s%s%n%08x.%s%d",
332 dirname, pathsep, &n, bp->hash,
333 suffixes[bp->type], nextid);
334 if (verbose)
335 BIO_printf(bio_out, "link %s -> %s\n",
336 ep->filename, &buf[n]);
337 if (unlink(buf) < 0 && errno != ENOENT)
338 BIO_printf(bio_err,
339 "%s: Can't unlink %s, %s\n",
340 opt_getprog(), buf, strerror(errno));
341 if (symlink(ep->filename, buf) < 0)
342 BIO_printf(bio_err,
343 "%s: Can't symlink %s, %s\n",
344 opt_getprog(), ep->filename,
345 strerror(errno));
346 } else if (remove_links) {
347 /* Link to be deleted */
348 snprintf(buf, buflen, "%s%s%n%08x.%s%d",
349 dirname, pathsep, &n, bp->hash,
350 suffixes[bp->type], ep->old_id);
351 if (verbose)
352 BIO_printf(bio_out, "unlink %s\n",
353 &buf[n]);
354 if (unlink(buf) < 0 && errno != ENOENT)
355 BIO_printf(bio_err,
356 "%s: Can't unlink %s, %s\n",
357 opt_getprog(), buf, strerror(errno));
358 }
359 OPENSSL_free(ep->filename);
360 OPENSSL_free(ep);
361 }
362 OPENSSL_free(bp);
363 }
364 hash_table[i] = NULL;
365 }
366 ret = 0;
367
368 OPENSSL_free(buf);
369 return ret;
370}
371
372typedef enum OPTION_choice {
373 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
374 OPT_COMPAT, OPT_OLD, OPT_N, OPT_VERBOSE
375} OPTION_CHOICE;
376
377OPTIONS rehash_options[] = {
378 {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert-directory...]\n"},
379 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
380 {"help", OPT_HELP, '-', "Display this summary"},
381 {"compat", OPT_COMPAT, '-', "Create both new- and old-style hash links"},
382 {"old", OPT_OLD, '-', "Use old-style hash to generate links"},
383 {"n", OPT_N, '-', "Do not remove existing links"},
384 {"v", OPT_VERBOSE, '-', "Verbose output"},
385 {NULL}
386};
387
388
389int rehash_main(int argc, char **argv)
390{
391 const char *env, *prog;
392 char *e, *m;
393 int ret = 0;
394 OPTION_CHOICE o;
395 enum Hash h = HASH_NEW;
396
397 prog = opt_init(argc, argv, rehash_options);
398 while ((o = opt_next()) != OPT_EOF) {
399 switch (o) {
400 case OPT_EOF:
401 case OPT_ERR:
402 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
403 goto end;
404 case OPT_HELP:
405 opt_help(rehash_options);
406 goto end;
407 case OPT_COMPAT:
408 h = HASH_BOTH;
409 break;
410 case OPT_OLD:
411 h = HASH_OLD;
412 break;
413 case OPT_N:
414 remove_links = 0;
415 break;
416 case OPT_VERBOSE:
417 verbose = 1;
418 break;
419 }
420 }
421 argc = opt_num_rest();
422 argv = opt_rest();
423
424 evpmd = EVP_sha1();
425 evpmdsize = EVP_MD_size(evpmd);
426
427 if (*argv) {
428 while (*argv)
429 ret |= do_dir(*argv++, h);
430 } else if ((env = getenv("SSL_CERT_DIR")) != NULL) {
431 m = BUF_strdup(env);
432 for (e = strtok(m, ":"); e != NULL; e = strtok(NULL, ":"))
433 ret |= do_dir(e, h);
434 OPENSSL_free(m);
435 } else {
436 ret |= do_dir("/etc/ssl/certs", h);
437 }
438
439 end:
440 return ret ? 2 : 0;
441}
442
443#else
Rich Salz62fdf4e2015-09-06 21:39:26 -0400444OPTIONS rehash_options[] = {
445 {NULL}
446};
Timo Teras8f6f1442015-05-07 12:48:47 -0400447
448int rehash_main(int argc, char **argv)
449{
Rich Salz9e0da062015-09-06 19:01:24 -0400450 BIO_printf(bio_err, "Not available; use c_rehash script\n");
Timo Teras8f6f1442015-05-07 12:48:47 -0400451 return (1);
452}
453
454#endif