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source: vbox/trunk/src/libs/openssl-1.1.1f/apps/rehash.c@ 83531

Last change on this file since 83531 was 83531, checked in by vboxsync, 5 years ago

setting svn:sync-process=export for openssl-1.1.1f, all files except tests
File size: 15.3 KB
Line 
1/*
2 * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2013-2014 Timo Teräs <[email protected]>
4 *
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11#include "apps.h"
12#include "progs.h"
13
14#if defined(OPENSSL_SYS_UNIX) || defined(__APPLE__) || \
15 (defined(__VMS) && defined(__DECC) && __CRTL_VER >= 80300000)
16# include <unistd.h>
17# include <stdio.h>
18# include <limits.h>
19# include <errno.h>
20# include <string.h>
21# include <ctype.h>
22# include <sys/stat.h>
23
24/*
25 * Make sure that the processing of symbol names is treated the same as when
26 * libcrypto is built. This is done automatically for public headers (see
27 * include/openssl/__DECC_INCLUDE_PROLOGUE.H and __DECC_INCLUDE_EPILOGUE.H),
28 * but not for internal headers.
29 */
30# ifdef __VMS
31# pragma names save
32# pragma names as_is,shortened
33# endif
34
35# include "internal/o_dir.h"
36
37# ifdef __VMS
38# pragma names restore
39# endif
40
41# include <openssl/evp.h>
42# include <openssl/pem.h>
43# include <openssl/x509.h>
44
45
46# ifndef PATH_MAX
47# define PATH_MAX 4096
48# endif
49# ifndef NAME_MAX
50# define NAME_MAX 255
51# endif
52# define MAX_COLLISIONS 256
53
54# if defined(OPENSSL_SYS_VXWORKS)
55/*
56 * VxWorks has no symbolic links
57 */
58
59# define lstat(path, buf) stat(path, buf)
60
61int symlink(const char *target, const char *linkpath)
62{
63 errno = ENOSYS;
64 return -1;
65}
66
67ssize_t readlink(const char *pathname, char *buf, size_t bufsiz)
68{
69 errno = ENOSYS;
70 return -1;
71}
72# endif
73
74typedef struct hentry_st {
75 struct hentry_st *next;
76 char *filename;
77 unsigned short old_id;
78 unsigned char need_symlink;
79 unsigned char digest[EVP_MAX_MD_SIZE];
80} HENTRY;
81
82typedef struct bucket_st {
83 struct bucket_st *next;
84 HENTRY *first_entry, *last_entry;
85 unsigned int hash;
86 unsigned short type;
87 unsigned short num_needed;
88} BUCKET;
89
90enum Type {
91 /* Keep in sync with |suffixes|, below. */
92 TYPE_CERT=0, TYPE_CRL=1
93};
94
95enum Hash {
96 HASH_OLD, HASH_NEW, HASH_BOTH
97};
98
99
100static int evpmdsize;
101static const EVP_MD *evpmd;
102static int remove_links = 1;
103static int verbose = 0;
104static BUCKET *hash_table[257];
105
106static const char *suffixes[] = { "", "r" };
107static const char *extensions[] = { "pem", "crt", "cer", "crl" };
108
109
110static void bit_set(unsigned char *set, unsigned int bit)
111{
112 set[bit >> 3] |= 1 << (bit & 0x7);
113}
114
115static int bit_isset(unsigned char *set, unsigned int bit)
116{
117 return set[bit >> 3] & (1 << (bit & 0x7));
118}
119
120
121/*
122 * Process an entry; return number of errors.
123 */
124static int add_entry(enum Type type, unsigned int hash, const char *filename,
125 const unsigned char *digest, int need_symlink,
126 unsigned short old_id)
127{
128 static BUCKET nilbucket;
129 static HENTRY nilhentry;
130 BUCKET *bp;
131 HENTRY *ep, *found = NULL;
132 unsigned int ndx = (type + hash) % OSSL_NELEM(hash_table);
133
134 for (bp = hash_table[ndx]; bp; bp = bp->next)
135 if (bp->type == type && bp->hash == hash)
136 break;
137 if (bp == NULL) {
138 bp = app_malloc(sizeof(*bp), "hash bucket");
139 *bp = nilbucket;
140 bp->next = hash_table[ndx];
141 bp->type = type;
142 bp->hash = hash;
143 hash_table[ndx] = bp;
144 }
145
146 for (ep = bp->first_entry; ep; ep = ep->next) {
147 if (digest && memcmp(digest, ep->digest, evpmdsize) == 0) {
148 BIO_printf(bio_err,
149 "%s: warning: skipping duplicate %s in %s\n",
150 opt_getprog(),
151 type == TYPE_CERT ? "certificate" : "CRL", filename);
152 return 0;
153 }
154 if (strcmp(filename, ep->filename) == 0) {
155 found = ep;
156 if (digest == NULL)
157 break;
158 }
159 }
160 ep = found;
161 if (ep == NULL) {
162 if (bp->num_needed >= MAX_COLLISIONS) {
163 BIO_printf(bio_err,
164 "%s: error: hash table overflow for %s\n",
165 opt_getprog(), filename);
166 return 1;
167 }
168 ep = app_malloc(sizeof(*ep), "collision bucket");
169 *ep = nilhentry;
170 ep->old_id = ~0;
171 ep->filename = OPENSSL_strdup(filename);
172 if (bp->last_entry)
173 bp->last_entry->next = ep;
174 if (bp->first_entry == NULL)
175 bp->first_entry = ep;
176 bp->last_entry = ep;
177 }
178
179 if (old_id < ep->old_id)
180 ep->old_id = old_id;
181 if (need_symlink && !ep->need_symlink) {
182 ep->need_symlink = 1;
183 bp->num_needed++;
184 memcpy(ep->digest, digest, evpmdsize);
185 }
186 return 0;
187}
188
189/*
190 * Check if a symlink goes to the right spot; return 0 if okay.
191 * This can be -1 if bad filename, or an error count.
192 */
193static int handle_symlink(const char *filename, const char *fullpath)
194{
195 unsigned int hash = 0;
196 int i, type, id;
197 unsigned char ch;
198 char linktarget[PATH_MAX], *endptr;
199 ossl_ssize_t n;
200
201 for (i = 0; i < 8; i++) {
202 ch = filename[i];
203 if (!isxdigit(ch))
204 return -1;
205 hash <<= 4;
206 hash += OPENSSL_hexchar2int(ch);
207 }
208 if (filename[i++] != '.')
209 return -1;
210 for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--) {
211 const char *suffix = suffixes[type];
212 if (strncasecmp(suffix, &filename[i], strlen(suffix)) == 0)
213 break;
214 }
215 i += strlen(suffixes[type]);
216
217 id = strtoul(&filename[i], &endptr, 10);
218 if (*endptr != '\0')
219 return -1;
220
221 n = readlink(fullpath, linktarget, sizeof(linktarget));
222 if (n < 0 || n >= (int)sizeof(linktarget))
223 return -1;
224 linktarget[n] = 0;
225
226 return add_entry(type, hash, linktarget, NULL, 0, id);
227}
228
229/*
230 * process a file, return number of errors.
231 */
232static int do_file(const char *filename, const char *fullpath, enum Hash h)
233{
234 STACK_OF (X509_INFO) *inf = NULL;
235 X509_INFO *x;
236 X509_NAME *name = NULL;
237 BIO *b;
238 const char *ext;
239 unsigned char digest[EVP_MAX_MD_SIZE];
240 int type, errs = 0;
241 size_t i;
242
243 /* Does it end with a recognized extension? */
244 if ((ext = strrchr(filename, '.')) == NULL)
245 goto end;
246 for (i = 0; i < OSSL_NELEM(extensions); i++) {
247 if (strcasecmp(extensions[i], ext + 1) == 0)
248 break;
249 }
250 if (i >= OSSL_NELEM(extensions))
251 goto end;
252
253 /* Does it have X.509 data in it? */
254 if ((b = BIO_new_file(fullpath, "r")) == NULL) {
255 BIO_printf(bio_err, "%s: error: skipping %s, cannot open file\n",
256 opt_getprog(), filename);
257 errs++;
258 goto end;
259 }
260 inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
261 BIO_free(b);
262 if (inf == NULL)
263 goto end;
264
265 if (sk_X509_INFO_num(inf) != 1) {
266 BIO_printf(bio_err,
267 "%s: warning: skipping %s,"
268 "it does not contain exactly one certificate or CRL\n",
269 opt_getprog(), filename);
270 /* This is not an error. */
271 goto end;
272 }
273 x = sk_X509_INFO_value(inf, 0);
274 if (x->x509 != NULL) {
275 type = TYPE_CERT;
276 name = X509_get_subject_name(x->x509);
277 if (!X509_digest(x->x509, evpmd, digest, NULL)) {
278 BIO_printf(bio_err, "out of memory\n");
279 ++errs;
280 goto end;
281 }
282 } else if (x->crl != NULL) {
283 type = TYPE_CRL;
284 name = X509_CRL_get_issuer(x->crl);
285 if (!X509_CRL_digest(x->crl, evpmd, digest, NULL)) {
286 BIO_printf(bio_err, "out of memory\n");
287 ++errs;
288 goto end;
289 }
290 } else {
291 ++errs;
292 goto end;
293 }
294 if (name != NULL) {
295 if ((h == HASH_NEW) || (h == HASH_BOTH))
296 errs += add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0);
297 if ((h == HASH_OLD) || (h == HASH_BOTH))
298 errs += add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0);
299 }
300
301end:
302 sk_X509_INFO_pop_free(inf, X509_INFO_free);
303 return errs;
304}
305
306static void str_free(char *s)
307{
308 OPENSSL_free(s);
309}
310
311static int ends_with_dirsep(const char *path)
312{
313 if (*path != '\0')
314 path += strlen(path) - 1;
315# if defined __VMS
316 if (*path == ']' || *path == '>' || *path == ':')
317 return 1;
318# elif defined _WIN32
319 if (*path == '\\')
320 return 1;
321# endif
322 return *path == '/';
323}
324
325/*
326 * Process a directory; return number of errors found.
327 */
328static int do_dir(const char *dirname, enum Hash h)
329{
330 BUCKET *bp, *nextbp;
331 HENTRY *ep, *nextep;
332 OPENSSL_DIR_CTX *d = NULL;
333 struct stat st;
334 unsigned char idmask[MAX_COLLISIONS / 8];
335 int n, numfiles, nextid, buflen, errs = 0;
336 size_t i;
337 const char *pathsep;
338 const char *filename;
339 char *buf, *copy = NULL;
340 STACK_OF(OPENSSL_STRING) *files = NULL;
341
342 if (app_access(dirname, W_OK) < 0) {
343 BIO_printf(bio_err, "Skipping %s, can't write\n", dirname);
344 return 1;
345 }
346 buflen = strlen(dirname);
347 pathsep = (buflen && !ends_with_dirsep(dirname)) ? "/": "";
348 buflen += NAME_MAX + 1 + 1;
349 buf = app_malloc(buflen, "filename buffer");
350
351 if (verbose)
352 BIO_printf(bio_out, "Doing %s\n", dirname);
353
354 if ((files = sk_OPENSSL_STRING_new_null()) == NULL) {
355 BIO_printf(bio_err, "Skipping %s, out of memory\n", dirname);
356 errs = 1;
357 goto err;
358 }
359 while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) {
360 if ((copy = OPENSSL_strdup(filename)) == NULL
361 || sk_OPENSSL_STRING_push(files, copy) == 0) {
362 OPENSSL_free(copy);
363 BIO_puts(bio_err, "out of memory\n");
364 errs = 1;
365 goto err;
366 }
367 }
368 OPENSSL_DIR_end(&d);
369 sk_OPENSSL_STRING_sort(files);
370
371 numfiles = sk_OPENSSL_STRING_num(files);
372 for (n = 0; n < numfiles; ++n) {
373 filename = sk_OPENSSL_STRING_value(files, n);
374 if (BIO_snprintf(buf, buflen, "%s%s%s",
375 dirname, pathsep, filename) >= buflen)
376 continue;
377 if (lstat(buf, &st) < 0)
378 continue;
379 if (S_ISLNK(st.st_mode) && handle_symlink(filename, buf) == 0)
380 continue;
381 errs += do_file(filename, buf, h);
382 }
383
384 for (i = 0; i < OSSL_NELEM(hash_table); i++) {
385 for (bp = hash_table[i]; bp; bp = nextbp) {
386 nextbp = bp->next;
387 nextid = 0;
388 memset(idmask, 0, (bp->num_needed + 7) / 8);
389 for (ep = bp->first_entry; ep; ep = ep->next)
390 if (ep->old_id < bp->num_needed)
391 bit_set(idmask, ep->old_id);
392
393 for (ep = bp->first_entry; ep; ep = nextep) {
394 nextep = ep->next;
395 if (ep->old_id < bp->num_needed) {
396 /* Link exists, and is used as-is */
397 BIO_snprintf(buf, buflen, "%08x.%s%d", bp->hash,
398 suffixes[bp->type], ep->old_id);
399 if (verbose)
400 BIO_printf(bio_out, "link %s -> %s\n",
401 ep->filename, buf);
402 } else if (ep->need_symlink) {
403 /* New link needed (it may replace something) */
404 while (bit_isset(idmask, nextid))
405 nextid++;
406
407 BIO_snprintf(buf, buflen, "%s%s%n%08x.%s%d",
408 dirname, pathsep, &n, bp->hash,
409 suffixes[bp->type], nextid);
410 if (verbose)
411 BIO_printf(bio_out, "link %s -> %s\n",
412 ep->filename, &buf[n]);
413 if (unlink(buf) < 0 && errno != ENOENT) {
414 BIO_printf(bio_err,
415 "%s: Can't unlink %s, %s\n",
416 opt_getprog(), buf, strerror(errno));
417 errs++;
418 }
419 if (symlink(ep->filename, buf) < 0) {
420 BIO_printf(bio_err,
421 "%s: Can't symlink %s, %s\n",
422 opt_getprog(), ep->filename,
423 strerror(errno));
424 errs++;
425 }
426 bit_set(idmask, nextid);
427 } else if (remove_links) {
428 /* Link to be deleted */
429 BIO_snprintf(buf, buflen, "%s%s%n%08x.%s%d",
430 dirname, pathsep, &n, bp->hash,
431 suffixes[bp->type], ep->old_id);
432 if (verbose)
433 BIO_printf(bio_out, "unlink %s\n",
434 &buf[n]);
435 if (unlink(buf) < 0 && errno != ENOENT) {
436 BIO_printf(bio_err,
437 "%s: Can't unlink %s, %s\n",
438 opt_getprog(), buf, strerror(errno));
439 errs++;
440 }
441 }
442 OPENSSL_free(ep->filename);
443 OPENSSL_free(ep);
444 }
445 OPENSSL_free(bp);
446 }
447 hash_table[i] = NULL;
448 }
449
450 err:
451 sk_OPENSSL_STRING_pop_free(files, str_free);
452 OPENSSL_free(buf);
453 return errs;
454}
455
456typedef enum OPTION_choice {
457 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
458 OPT_COMPAT, OPT_OLD, OPT_N, OPT_VERBOSE
459} OPTION_CHOICE;
460
461const OPTIONS rehash_options[] = {
462 {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert-directory...]\n"},
463 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
464 {"help", OPT_HELP, '-', "Display this summary"},
465 {"h", OPT_HELP, '-', "Display this summary"},
466 {"compat", OPT_COMPAT, '-', "Create both new- and old-style hash links"},
467 {"old", OPT_OLD, '-', "Use old-style hash to generate links"},
468 {"n", OPT_N, '-', "Do not remove existing links"},
469 {"v", OPT_VERBOSE, '-', "Verbose output"},
470 {NULL}
471};
472
473
474int rehash_main(int argc, char **argv)
475{
476 const char *env, *prog;
477 char *e, *m;
478 int errs = 0;
479 OPTION_CHOICE o;
480 enum Hash h = HASH_NEW;
481
482 prog = opt_init(argc, argv, rehash_options);
483 while ((o = opt_next()) != OPT_EOF) {
484 switch (o) {
485 case OPT_EOF:
486 case OPT_ERR:
487 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
488 goto end;
489 case OPT_HELP:
490 opt_help(rehash_options);
491 goto end;
492 case OPT_COMPAT:
493 h = HASH_BOTH;
494 break;
495 case OPT_OLD:
496 h = HASH_OLD;
497 break;
498 case OPT_N:
499 remove_links = 0;
500 break;
501 case OPT_VERBOSE:
502 verbose = 1;
503 break;
504 }
505 }
506 argc = opt_num_rest();
507 argv = opt_rest();
508
509 evpmd = EVP_sha1();
510 evpmdsize = EVP_MD_size(evpmd);
511
512 if (*argv != NULL) {
513 while (*argv != NULL)
514 errs += do_dir(*argv++, h);
515 } else if ((env = getenv(X509_get_default_cert_dir_env())) != NULL) {
516 char lsc[2] = { LIST_SEPARATOR_CHAR, '\0' };
517 m = OPENSSL_strdup(env);
518 for (e = strtok(m, lsc); e != NULL; e = strtok(NULL, lsc))
519 errs += do_dir(e, h);
520 OPENSSL_free(m);
521 } else {
522 errs += do_dir(X509_get_default_cert_dir(), h);
523 }
524
525 end:
526 return errs;
527}
528
529#else
530const OPTIONS rehash_options[] = {
531 {NULL}
532};
533
534int rehash_main(int argc, char **argv)
535{
536 BIO_printf(bio_err, "Not available; use c_rehash script\n");
537 return 1;
538}
539
540#endif /* defined(OPENSSL_SYS_UNIX) || defined(__APPLE__) */
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