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e23a0ce8 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
e23a0ce8 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
e23a0ce8 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
e23a0ce8 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
7f4e0805 | 23 | #include <errno.h> |
b853f6e9 | 24 | #include <sys/mman.h> |
b61e476f | 25 | #include <mntent.h> |
7f4e0805 LP |
26 | |
27 | #include <libcryptsetup.h> | |
e23a0ce8 | 28 | |
8cf3ca80 | 29 | #include "fileio.h" |
e23a0ce8 LP |
30 | #include "log.h" |
31 | #include "util.h" | |
9eb977db | 32 | #include "path-util.h" |
21bc923a | 33 | #include "strv.h" |
7f4e0805 | 34 | #include "ask-password-api.h" |
f6a6225e | 35 | #include "def.h" |
1ca208fb ZJS |
36 | #include "libudev.h" |
37 | #include "udev-util.h" | |
7f4e0805 | 38 | |
f75cac37 LP |
39 | static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ |
40 | static char *arg_cipher = NULL; | |
41 | static unsigned arg_key_size = 0; | |
42 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
43 | static unsigned arg_keyfile_size = 0; | |
44 | static unsigned arg_keyfile_offset = 0; | |
45 | static char *arg_hash = NULL; | |
46 | static unsigned arg_tries = 3; | |
47 | static bool arg_readonly = false; | |
48 | static bool arg_verify = false; | |
49 | static bool arg_discards = false; | |
50 | static bool arg_tcrypt_hidden = false; | |
51 | static bool arg_tcrypt_system = false; | |
52 | static char **arg_tcrypt_keyfiles = NULL; | |
53 | static usec_t arg_timeout = 0; | |
7f4e0805 | 54 | |
1fc76335 LP |
55 | /* Options Debian's crypttab knows we don't: |
56 | ||
57 | offset= | |
58 | skip= | |
59 | precheck= | |
60 | check= | |
61 | checkargs= | |
62 | noearly= | |
63 | loud= | |
64 | keyscript= | |
65 | */ | |
66 | ||
7f4e0805 LP |
67 | static int parse_one_option(const char *option) { |
68 | assert(option); | |
69 | ||
70 | /* Handled outside of this tool */ | |
adc40dc2 | 71 | if (streq(option, "noauto") || streq(option, "nofail")) |
7f4e0805 LP |
72 | return 0; |
73 | ||
74 | if (startswith(option, "cipher=")) { | |
75 | char *t; | |
76 | ||
74b1c371 LP |
77 | t = strdup(option+7); |
78 | if (!t) | |
4b93637f | 79 | return log_oom(); |
7f4e0805 | 80 | |
f75cac37 LP |
81 | free(arg_cipher); |
82 | arg_cipher = t; | |
7f4e0805 LP |
83 | |
84 | } else if (startswith(option, "size=")) { | |
85 | ||
f75cac37 | 86 | if (safe_atou(option+5, &arg_key_size) < 0) { |
7f4e0805 LP |
87 | log_error("size= parse failure, ignoring."); |
88 | return 0; | |
89 | } | |
90 | ||
6131a78b DH |
91 | if (arg_key_size % 8) { |
92 | log_error("size= not a multiple of 8, ignoring."); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | arg_key_size /= 8; | |
97 | ||
b4a11878 CS |
98 | } else if (startswith(option, "key-slot=")) { |
99 | ||
f75cac37 LP |
100 | arg_type = CRYPT_LUKS1; |
101 | if (safe_atoi(option+9, &arg_key_slot) < 0) { | |
b4a11878 CS |
102 | log_error("key-slot= parse failure, ignoring."); |
103 | return 0; | |
104 | } | |
105 | ||
8cf3ca80 JJ |
106 | } else if (startswith(option, "tcrypt-keyfile=")) { |
107 | ||
f75cac37 | 108 | arg_type = CRYPT_TCRYPT; |
4b93637f | 109 | if (path_is_absolute(option+15)) { |
f75cac37 | 110 | if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) |
4b93637f LP |
111 | return log_oom(); |
112 | } else | |
8cf3ca80 JJ |
113 | log_error("Key file path '%s' is not absolute. Ignoring.", option+15); |
114 | ||
4271d823 TG |
115 | } else if (startswith(option, "keyfile-size=")) { |
116 | ||
f75cac37 | 117 | if (safe_atou(option+13, &arg_keyfile_size) < 0) { |
4271d823 TG |
118 | log_error("keyfile-size= parse failure, ignoring."); |
119 | return 0; | |
120 | } | |
121 | ||
880a599e TG |
122 | } else if (startswith(option, "keyfile-offset=")) { |
123 | ||
f75cac37 | 124 | if (safe_atou(option+15, &arg_keyfile_offset) < 0) { |
880a599e TG |
125 | log_error("keyfile-offset= parse failure, ignoring."); |
126 | return 0; | |
127 | } | |
128 | ||
7f4e0805 LP |
129 | } else if (startswith(option, "hash=")) { |
130 | char *t; | |
131 | ||
74b1c371 LP |
132 | t = strdup(option+5); |
133 | if (!t) | |
4b93637f | 134 | return log_oom(); |
7f4e0805 | 135 | |
f75cac37 LP |
136 | free(arg_hash); |
137 | arg_hash = t; | |
7f4e0805 LP |
138 | |
139 | } else if (startswith(option, "tries=")) { | |
140 | ||
f75cac37 | 141 | if (safe_atou(option+6, &arg_tries) < 0) { |
7f4e0805 LP |
142 | log_error("tries= parse failure, ignoring."); |
143 | return 0; | |
144 | } | |
145 | ||
f75cac37 LP |
146 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
147 | arg_readonly = true; | |
7f4e0805 | 148 | else if (streq(option, "verify")) |
f75cac37 LP |
149 | arg_verify = true; |
150 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
151 | arg_discards = true; | |
260ab287 | 152 | else if (streq(option, "luks")) |
f75cac37 | 153 | arg_type = CRYPT_LUKS1; |
8cf3ca80 | 154 | else if (streq(option, "tcrypt")) |
f75cac37 | 155 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 156 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
157 | arg_type = CRYPT_TCRYPT; |
158 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 159 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
160 | arg_type = CRYPT_TCRYPT; |
161 | arg_tcrypt_system = true; | |
162 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) | |
163 | arg_type = CRYPT_PLAIN; | |
7f4e0805 LP |
164 | else if (startswith(option, "timeout=")) { |
165 | ||
f75cac37 | 166 | if (parse_sec(option+8, &arg_timeout) < 0) { |
7f4e0805 LP |
167 | log_error("timeout= parse failure, ignoring."); |
168 | return 0; | |
169 | } | |
170 | ||
41e6f28a | 171 | } else if (!streq(option, "none")) |
7f4e0805 LP |
172 | log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int parse_options(const char *options) { | |
a2a5291b | 178 | const char *word, *state; |
7f4e0805 | 179 | size_t l; |
74b1c371 | 180 | int r; |
7f4e0805 LP |
181 | |
182 | assert(options); | |
183 | ||
a2a5291b | 184 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 185 | _cleanup_free_ char *o; |
7f4e0805 | 186 | |
a2a5291b | 187 | o = strndup(word, l); |
74b1c371 | 188 | if (!o) |
7f4e0805 | 189 | return -ENOMEM; |
7f4e0805 | 190 | r = parse_one_option(o); |
7f4e0805 LP |
191 | if (r < 0) |
192 | return r; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static void log_glue(int level, const char *msg, void *usrptr) { | |
260ab287 | 199 | log_debug("%s", msg); |
7f4e0805 | 200 | } |
e23a0ce8 | 201 | |
1ca208fb | 202 | static char* disk_description(const char *path) { |
74b1c371 | 203 | |
f75cac37 | 204 | static const char name_fields[] = |
74b1c371 LP |
205 | "ID_PART_ENTRY_NAME\0" |
206 | "DM_NAME\0" | |
207 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 208 | "ID_MODEL\0"; |
74b1c371 | 209 | |
1ca208fb ZJS |
210 | _cleanup_udev_unref_ struct udev *udev = NULL; |
211 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
b1a2da0a | 212 | struct stat st; |
74b1c371 | 213 | const char *i; |
b1a2da0a LP |
214 | |
215 | assert(path); | |
216 | ||
217 | if (stat(path, &st) < 0) | |
218 | return NULL; | |
219 | ||
220 | if (!S_ISBLK(st.st_mode)) | |
221 | return NULL; | |
222 | ||
74b1c371 LP |
223 | udev = udev_new(); |
224 | if (!udev) | |
b1a2da0a LP |
225 | return NULL; |
226 | ||
74b1c371 LP |
227 | device = udev_device_new_from_devnum(udev, 'b', st.st_rdev); |
228 | if (!device) | |
1ca208fb | 229 | return NULL; |
b1a2da0a | 230 | |
74b1c371 LP |
231 | NULSTR_FOREACH(i, name_fields) { |
232 | const char *name; | |
233 | ||
234 | name = udev_device_get_property_value(device, i); | |
1ca208fb ZJS |
235 | if (!isempty(name)) |
236 | return strdup(name); | |
74b1c371 | 237 | } |
b1a2da0a | 238 | |
1ca208fb | 239 | return NULL; |
b1a2da0a LP |
240 | } |
241 | ||
b61e476f | 242 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 243 | _cleanup_free_ char *device = NULL; |
5862d652 | 244 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
245 | struct mntent *m; |
246 | ||
247 | /* Yeah, we don't support native systemd unit files here for now */ | |
248 | ||
249 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 250 | return NULL; |
b61e476f | 251 | |
e0295d26 LP |
252 | f = setmntent("/etc/fstab", "r"); |
253 | if (!f) | |
5862d652 | 254 | return NULL; |
b61e476f LP |
255 | |
256 | while ((m = getmntent(f))) | |
5862d652 ZJS |
257 | if (path_equal(m->mnt_fsname, device)) |
258 | return strdup(m->mnt_dir); | |
b61e476f | 259 | |
5862d652 | 260 | return NULL; |
b61e476f LP |
261 | } |
262 | ||
e7d90b71 JJ |
263 | static int get_password(const char *name, usec_t until, bool accept_cached, char ***passwords) { |
264 | int r; | |
265 | char **p; | |
266 | _cleanup_free_ char *text = NULL; | |
9fa1de96 DH |
267 | _cleanup_free_ char *escaped_name = NULL; |
268 | char *id; | |
e7d90b71 JJ |
269 | |
270 | assert(name); | |
271 | assert(passwords); | |
272 | ||
273 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) | |
274 | return log_oom(); | |
275 | ||
9fa1de96 DH |
276 | escaped_name = cescape(name); |
277 | if (!escaped_name) | |
278 | return log_oom(); | |
279 | ||
280 | id = strappenda("cryptsetup:", escaped_name); | |
281 | ||
282 | r = ask_password_auto(text, "drive-harddisk", id, until, accept_cached, passwords); | |
e7d90b71 | 283 | if (r < 0) { |
da927ba9 | 284 | log_error_errno(r, "Failed to query password: %m"); |
e7d90b71 JJ |
285 | return r; |
286 | } | |
287 | ||
f75cac37 | 288 | if (arg_verify) { |
e7d90b71 JJ |
289 | _cleanup_strv_free_ char **passwords2 = NULL; |
290 | ||
291 | assert(strv_length(*passwords) == 1); | |
292 | ||
293 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) | |
294 | return log_oom(); | |
295 | ||
9fa1de96 DH |
296 | id = strappenda("cryptsetup-verification:", escaped_name); |
297 | ||
298 | r = ask_password_auto(text, "drive-harddisk", id, until, false, &passwords2); | |
e7d90b71 | 299 | if (r < 0) { |
da927ba9 | 300 | log_error_errno(r, "Failed to query verification password: %m"); |
e7d90b71 JJ |
301 | return r; |
302 | } | |
303 | ||
304 | assert(strv_length(passwords2) == 1); | |
305 | ||
306 | if (!streq(*passwords[0], passwords2[0])) { | |
307 | log_warning("Passwords did not match, retrying."); | |
308 | return -EAGAIN; | |
309 | } | |
310 | } | |
311 | ||
312 | strv_uniq(*passwords); | |
313 | ||
314 | STRV_FOREACH(p, *passwords) { | |
315 | char *c; | |
316 | ||
f75cac37 | 317 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
318 | continue; |
319 | ||
320 | /* Pad password if necessary */ | |
f75cac37 | 321 | if (!(c = new(char, arg_key_size))) |
e7d90b71 JJ |
322 | return log_oom(); |
323 | ||
f75cac37 | 324 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
325 | free(*p); |
326 | *p = c; | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
8cf3ca80 JJ |
332 | static int attach_tcrypt(struct crypt_device *cd, |
333 | const char *name, | |
334 | const char *key_file, | |
335 | char **passwords, | |
336 | uint32_t flags) { | |
337 | int r = 0; | |
338 | _cleanup_free_ char *passphrase = NULL; | |
339 | struct crypt_params_tcrypt params = { | |
340 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
341 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
342 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
343 | }; |
344 | ||
345 | assert(cd); | |
346 | assert(name); | |
f268f57f | 347 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 348 | |
f75cac37 | 349 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
350 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
351 | ||
f75cac37 | 352 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
353 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
354 | ||
355 | if (key_file) { | |
356 | r = read_one_line_file(key_file, &passphrase); | |
357 | if (r < 0) { | |
da927ba9 | 358 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
359 | return -EAGAIN; |
360 | } | |
361 | ||
362 | params.passphrase = passphrase; | |
363 | } else | |
364 | params.passphrase = passwords[0]; | |
365 | params.passphrase_size = strlen(params.passphrase); | |
366 | ||
367 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
368 | if (r < 0) { | |
369 | if (key_file && r == -EPERM) { | |
370 | log_error("Failed to activate using password file '%s'.", key_file); | |
371 | return -EAGAIN; | |
372 | } | |
373 | return r; | |
374 | } | |
375 | ||
ac1a87b9 | 376 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
377 | } |
378 | ||
10fb4e35 JJ |
379 | static int attach_luks_or_plain(struct crypt_device *cd, |
380 | const char *name, | |
381 | const char *key_file, | |
382 | char **passwords, | |
383 | uint32_t flags) { | |
384 | int r = 0; | |
385 | bool pass_volume_key = false; | |
386 | ||
387 | assert(cd); | |
388 | assert(name); | |
389 | assert(key_file || passwords); | |
390 | ||
f75cac37 | 391 | if (!arg_type || streq(arg_type, CRYPT_LUKS1)) |
10fb4e35 JJ |
392 | r = crypt_load(cd, CRYPT_LUKS1, NULL); |
393 | ||
f75cac37 | 394 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
10fb4e35 JJ |
395 | struct crypt_params_plain params = {}; |
396 | const char *cipher, *cipher_mode; | |
397 | _cleanup_free_ char *truncated_cipher = NULL; | |
398 | ||
f75cac37 | 399 | if (arg_hash) { |
10fb4e35 | 400 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
401 | if (!streq(arg_hash, "plain")) |
402 | params.hash = arg_hash; | |
8a52210c ZJS |
403 | } else if (!key_file) |
404 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
405 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
406 | params.hash = "ripemd160"; |
407 | ||
f75cac37 | 408 | if (arg_cipher) { |
10fb4e35 JJ |
409 | size_t l; |
410 | ||
f75cac37 LP |
411 | l = strcspn(arg_cipher, "-"); |
412 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
413 | if (!truncated_cipher) |
414 | return log_oom(); | |
415 | ||
416 | cipher = truncated_cipher; | |
f75cac37 | 417 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
418 | } else { |
419 | cipher = "aes"; | |
420 | cipher_mode = "cbc-essiv:sha256"; | |
421 | } | |
422 | ||
423 | /* for CRYPT_PLAIN limit reads | |
424 | * from keyfile to key length, and | |
425 | * ignore keyfile-size */ | |
6131a78b | 426 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
427 | |
428 | /* In contrast to what the name | |
429 | * crypt_setup() might suggest this | |
430 | * doesn't actually format anything, | |
431 | * it just configures encryption | |
432 | * parameters when used for plain | |
433 | * mode. */ | |
434 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, | |
f75cac37 | 435 | NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
436 | |
437 | /* hash == NULL implies the user passed "plain" */ | |
438 | pass_volume_key = (params.hash == NULL); | |
439 | } | |
440 | ||
441 | if (r < 0) { | |
da927ba9 | 442 | log_error_errno(r, "Loading of cryptographic parameters failed: %m"); |
10fb4e35 JJ |
443 | return r; |
444 | } | |
445 | ||
446 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
447 | crypt_get_cipher(cd), | |
448 | crypt_get_cipher_mode(cd), | |
449 | crypt_get_volume_key_size(cd)*8, | |
450 | crypt_get_device_name(cd)); | |
451 | ||
452 | if (key_file) { | |
f75cac37 LP |
453 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, |
454 | key_file, arg_keyfile_size, | |
455 | arg_keyfile_offset, flags); | |
10fb4e35 | 456 | if (r < 0) { |
da927ba9 | 457 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
458 | return -EAGAIN; |
459 | } | |
460 | } else { | |
461 | char **p; | |
462 | ||
463 | STRV_FOREACH(p, passwords) { | |
464 | if (pass_volume_key) | |
f75cac37 | 465 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 466 | else |
f75cac37 | 467 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
468 | |
469 | if (r >= 0) | |
470 | break; | |
471 | } | |
472 | } | |
473 | ||
474 | return r; | |
475 | } | |
476 | ||
dd5e696d LP |
477 | static int help(void) { |
478 | ||
479 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
480 | "%s detach VOLUME\n\n" | |
481 | "Attaches or detaches an encrypted block device.\n", | |
482 | program_invocation_short_name, | |
483 | program_invocation_short_name); | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
e23a0ce8 | 488 | int main(int argc, char *argv[]) { |
7f4e0805 LP |
489 | int r = EXIT_FAILURE; |
490 | struct crypt_device *cd = NULL; | |
e23a0ce8 | 491 | |
dd5e696d LP |
492 | if (argc <= 1) { |
493 | help(); | |
494 | return EXIT_SUCCESS; | |
495 | } | |
496 | ||
e23a0ce8 LP |
497 | if (argc < 3) { |
498 | log_error("This program requires at least two arguments."); | |
499 | return EXIT_FAILURE; | |
500 | } | |
501 | ||
bb7df0da | 502 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
503 | log_parse_environment(); |
504 | log_open(); | |
505 | ||
4c12626c LP |
506 | umask(0022); |
507 | ||
260ab287 | 508 | if (streq(argv[1], "attach")) { |
7f4e0805 LP |
509 | uint32_t flags = 0; |
510 | int k; | |
10fb4e35 | 511 | unsigned tries; |
260ab287 | 512 | usec_t until; |
e2d480b9 | 513 | crypt_status_info status; |
10fb4e35 JJ |
514 | const char *key_file = NULL, *name = NULL; |
515 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL; | |
7f4e0805 | 516 | |
b61e476f LP |
517 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
518 | ||
7f4e0805 LP |
519 | if (argc < 4) { |
520 | log_error("attach requires at least two arguments."); | |
521 | goto finish; | |
522 | } | |
523 | ||
1fc76335 LP |
524 | if (argc >= 5 && |
525 | argv[4][0] && | |
526 | !streq(argv[4], "-") && | |
527 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
528 | |
529 | if (!path_is_absolute(argv[4])) | |
8cf3ca80 | 530 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
531 | else |
532 | key_file = argv[4]; | |
533 | } | |
534 | ||
74b1c371 LP |
535 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
536 | if (parse_options(argv[5]) < 0) | |
537 | goto finish; | |
538 | } | |
e23a0ce8 | 539 | |
b853f6e9 LP |
540 | /* A delicious drop of snake oil */ |
541 | mlockall(MCL_FUTURE); | |
542 | ||
b1a2da0a | 543 | description = disk_description(argv[3]); |
b61e476f LP |
544 | mount_point = disk_mount_point(argv[2]); |
545 | ||
546 | if (description && streq(argv[2], description)) { | |
547 | /* If the description string is simply the | |
548 | * volume name, then let's not show this | |
549 | * twice */ | |
550 | free(description); | |
551 | description = NULL; | |
552 | } | |
553 | ||
7de80bfe | 554 | k = 0; |
b61e476f | 555 | if (mount_point && description) |
7de80bfe | 556 | k = asprintf(&name_buffer, "%s (%s) on %s", description, argv[2], mount_point); |
b61e476f | 557 | else if (mount_point) |
7de80bfe | 558 | k = asprintf(&name_buffer, "%s on %s", argv[2], mount_point); |
b61e476f | 559 | else if (description) |
7de80bfe | 560 | k = asprintf(&name_buffer, "%s (%s)", description, argv[2]); |
b61e476f | 561 | |
7de80bfe KZ |
562 | if (k < 0) { |
563 | log_oom(); | |
564 | goto finish; | |
565 | } | |
b61e476f | 566 | name = name_buffer ? name_buffer : argv[2]; |
b1a2da0a | 567 | |
74b1c371 LP |
568 | k = crypt_init(&cd, argv[3]); |
569 | if (k) { | |
da927ba9 | 570 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
571 | goto finish; |
572 | } | |
e23a0ce8 | 573 | |
7f4e0805 | 574 | crypt_set_log_callback(cd, log_glue, NULL); |
7f4e0805 | 575 | |
260ab287 LP |
576 | status = crypt_status(cd, argv[2]); |
577 | if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { | |
578 | log_info("Volume %s already active.", argv[2]); | |
579 | r = EXIT_SUCCESS; | |
7f4e0805 LP |
580 | goto finish; |
581 | } | |
582 | ||
f75cac37 | 583 | if (arg_readonly) |
7f4e0805 LP |
584 | flags |= CRYPT_ACTIVATE_READONLY; |
585 | ||
f75cac37 | 586 | if (arg_discards) |
2a2aab60 MM |
587 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
588 | ||
f75cac37 LP |
589 | if (arg_timeout > 0) |
590 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
7dcda352 LP |
591 | else |
592 | until = 0; | |
260ab287 | 593 | |
6131a78b | 594 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 595 | |
10fb4e35 JJ |
596 | if (key_file) { |
597 | struct stat st; | |
e2d480b9 | 598 | |
10fb4e35 JJ |
599 | /* Ideally we'd do this on the open fd, but since this is just a |
600 | * warning it's OK to do this in two steps. */ | |
601 | if (stat(key_file, &st) >= 0 && (st.st_mode & 0005)) | |
602 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
603 | } |
604 | ||
f75cac37 | 605 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
e7d90b71 | 606 | _cleanup_strv_free_ char **passwords = NULL; |
260ab287 LP |
607 | |
608 | if (!key_file) { | |
f75cac37 | 609 | k = get_password(name, until, tries == 0 && !arg_verify, &passwords); |
e7d90b71 JJ |
610 | if (k == -EAGAIN) |
611 | continue; | |
612 | else if (k < 0) | |
260ab287 | 613 | goto finish; |
260ab287 LP |
614 | } |
615 | ||
f75cac37 | 616 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
8cf3ca80 JJ |
617 | k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
618 | else | |
619 | k = attach_luks_or_plain(cd, argv[2], key_file, passwords, flags); | |
260ab287 LP |
620 | if (k >= 0) |
621 | break; | |
10fb4e35 JJ |
622 | else if (k == -EAGAIN) { |
623 | key_file = NULL; | |
624 | continue; | |
625 | } else if (k != -EPERM) { | |
da927ba9 | 626 | log_error_errno(k, "Failed to activate: %m"); |
260ab287 LP |
627 | goto finish; |
628 | } | |
629 | ||
630 | log_warning("Invalid passphrase."); | |
7f4e0805 LP |
631 | } |
632 | ||
f75cac37 | 633 | if (arg_tries != 0 && tries >= arg_tries) { |
10fb4e35 | 634 | log_error("Too many attempts; giving up."); |
260ab287 | 635 | r = EXIT_FAILURE; |
bd40a2d8 | 636 | goto finish; |
7f4e0805 LP |
637 | } |
638 | ||
639 | } else if (streq(argv[1], "detach")) { | |
640 | int k; | |
641 | ||
74b1c371 LP |
642 | k = crypt_init_by_name(&cd, argv[2]); |
643 | if (k) { | |
da927ba9 | 644 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
645 | goto finish; |
646 | } | |
647 | ||
648 | crypt_set_log_callback(cd, log_glue, NULL); | |
649 | ||
74b1c371 LP |
650 | k = crypt_deactivate(cd, argv[2]); |
651 | if (k < 0) { | |
da927ba9 | 652 | log_error_errno(k, "Failed to deactivate: %m"); |
7f4e0805 LP |
653 | goto finish; |
654 | } | |
e23a0ce8 LP |
655 | |
656 | } else { | |
657 | log_error("Unknown verb %s.", argv[1]); | |
658 | goto finish; | |
659 | } | |
660 | ||
7f4e0805 LP |
661 | r = EXIT_SUCCESS; |
662 | ||
e23a0ce8 | 663 | finish: |
7f4e0805 LP |
664 | |
665 | if (cd) | |
666 | crypt_free(cd); | |
667 | ||
f75cac37 LP |
668 | free(arg_cipher); |
669 | free(arg_hash); | |
670 | strv_free(arg_tcrypt_keyfiles); | |
260ab287 | 671 | |
e23a0ce8 LP |
672 | return r; |
673 | } |