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663996b3 MS |
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 | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <errno.h> | |
24 | #include <sys/mman.h> | |
25 | #include <mntent.h> | |
26 | ||
27 | #include <libcryptsetup.h> | |
663996b3 | 28 | |
14228c0d | 29 | #include "fileio.h" |
663996b3 MS |
30 | #include "log.h" |
31 | #include "util.h" | |
32 | #include "path-util.h" | |
33 | #include "strv.h" | |
34 | #include "ask-password-api.h" | |
35 | #include "def.h" | |
60f067b4 JS |
36 | #include "libudev.h" |
37 | #include "udev-util.h" | |
38 | ||
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; | |
e735f4d4 | 46 | static char *arg_header = NULL; |
60f067b4 JS |
47 | static unsigned arg_tries = 3; |
48 | static bool arg_readonly = false; | |
49 | static bool arg_verify = false; | |
50 | static bool arg_discards = false; | |
51 | static bool arg_tcrypt_hidden = false; | |
52 | static bool arg_tcrypt_system = false; | |
53 | static char **arg_tcrypt_keyfiles = NULL; | |
54 | static usec_t arg_timeout = 0; | |
663996b3 MS |
55 | |
56 | /* Options Debian's crypttab knows we don't: | |
57 | ||
58 | offset= | |
59 | skip= | |
60 | precheck= | |
61 | check= | |
62 | checkargs= | |
63 | noearly= | |
64 | loud= | |
65 | keyscript= | |
66 | */ | |
67 | ||
68 | static int parse_one_option(const char *option) { | |
69 | assert(option); | |
70 | ||
71 | /* Handled outside of this tool */ | |
e735f4d4 | 72 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail")) |
663996b3 MS |
73 | return 0; |
74 | ||
75 | if (startswith(option, "cipher=")) { | |
76 | char *t; | |
77 | ||
78 | t = strdup(option+7); | |
79 | if (!t) | |
60f067b4 | 80 | return log_oom(); |
663996b3 | 81 | |
60f067b4 JS |
82 | free(arg_cipher); |
83 | arg_cipher = t; | |
663996b3 MS |
84 | |
85 | } else if (startswith(option, "size=")) { | |
86 | ||
60f067b4 | 87 | if (safe_atou(option+5, &arg_key_size) < 0) { |
663996b3 MS |
88 | log_error("size= parse failure, ignoring."); |
89 | return 0; | |
90 | } | |
91 | ||
60f067b4 JS |
92 | if (arg_key_size % 8) { |
93 | log_error("size= not a multiple of 8, ignoring."); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | arg_key_size /= 8; | |
98 | ||
99 | } else if (startswith(option, "key-slot=")) { | |
100 | ||
101 | arg_type = CRYPT_LUKS1; | |
102 | if (safe_atoi(option+9, &arg_key_slot) < 0) { | |
103 | log_error("key-slot= parse failure, ignoring."); | |
104 | return 0; | |
105 | } | |
106 | ||
14228c0d MB |
107 | } else if (startswith(option, "tcrypt-keyfile=")) { |
108 | ||
60f067b4 JS |
109 | arg_type = CRYPT_TCRYPT; |
110 | if (path_is_absolute(option+15)) { | |
111 | if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) | |
112 | return log_oom(); | |
113 | } else | |
14228c0d MB |
114 | log_error("Key file path '%s' is not absolute. Ignoring.", option+15); |
115 | ||
663996b3 MS |
116 | } else if (startswith(option, "keyfile-size=")) { |
117 | ||
60f067b4 | 118 | if (safe_atou(option+13, &arg_keyfile_size) < 0) { |
663996b3 MS |
119 | log_error("keyfile-size= parse failure, ignoring."); |
120 | return 0; | |
121 | } | |
122 | ||
123 | } else if (startswith(option, "keyfile-offset=")) { | |
124 | ||
60f067b4 | 125 | if (safe_atou(option+15, &arg_keyfile_offset) < 0) { |
663996b3 MS |
126 | log_error("keyfile-offset= parse failure, ignoring."); |
127 | return 0; | |
128 | } | |
129 | ||
130 | } else if (startswith(option, "hash=")) { | |
131 | char *t; | |
132 | ||
133 | t = strdup(option+5); | |
134 | if (!t) | |
60f067b4 | 135 | return log_oom(); |
663996b3 | 136 | |
60f067b4 JS |
137 | free(arg_hash); |
138 | arg_hash = t; | |
663996b3 | 139 | |
e735f4d4 MP |
140 | } else if (startswith(option, "header=")) { |
141 | arg_type = CRYPT_LUKS1; | |
142 | ||
143 | if (!path_is_absolute(option+7)) { | |
144 | log_error("Header path '%s' is not absolute, refusing.", option+7); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | if (arg_header) { | |
149 | log_error("Duplicate header= options, refusing."); | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
153 | arg_header = strdup(option+7); | |
154 | if (!arg_header) | |
155 | return log_oom(); | |
156 | ||
663996b3 MS |
157 | } else if (startswith(option, "tries=")) { |
158 | ||
60f067b4 | 159 | if (safe_atou(option+6, &arg_tries) < 0) { |
663996b3 MS |
160 | log_error("tries= parse failure, ignoring."); |
161 | return 0; | |
162 | } | |
163 | ||
60f067b4 JS |
164 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
165 | arg_readonly = true; | |
663996b3 | 166 | else if (streq(option, "verify")) |
60f067b4 JS |
167 | arg_verify = true; |
168 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
169 | arg_discards = true; | |
663996b3 | 170 | else if (streq(option, "luks")) |
60f067b4 | 171 | arg_type = CRYPT_LUKS1; |
14228c0d | 172 | else if (streq(option, "tcrypt")) |
60f067b4 | 173 | arg_type = CRYPT_TCRYPT; |
14228c0d | 174 | else if (streq(option, "tcrypt-hidden")) { |
60f067b4 JS |
175 | arg_type = CRYPT_TCRYPT; |
176 | arg_tcrypt_hidden = true; | |
14228c0d | 177 | } else if (streq(option, "tcrypt-system")) { |
60f067b4 JS |
178 | arg_type = CRYPT_TCRYPT; |
179 | arg_tcrypt_system = true; | |
180 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) | |
181 | arg_type = CRYPT_PLAIN; | |
663996b3 MS |
182 | else if (startswith(option, "timeout=")) { |
183 | ||
60f067b4 | 184 | if (parse_sec(option+8, &arg_timeout) < 0) { |
663996b3 MS |
185 | log_error("timeout= parse failure, ignoring."); |
186 | return 0; | |
187 | } | |
188 | ||
189 | } else if (!streq(option, "none")) | |
190 | log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static int parse_options(const char *options) { | |
5eef597e | 196 | const char *word, *state; |
663996b3 MS |
197 | size_t l; |
198 | int r; | |
199 | ||
200 | assert(options); | |
201 | ||
5eef597e | 202 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
663996b3 MS |
203 | _cleanup_free_ char *o; |
204 | ||
5eef597e | 205 | o = strndup(word, l); |
663996b3 MS |
206 | if (!o) |
207 | return -ENOMEM; | |
208 | r = parse_one_option(o); | |
209 | if (r < 0) | |
210 | return r; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static void log_glue(int level, const char *msg, void *usrptr) { | |
217 | log_debug("%s", msg); | |
218 | } | |
219 | ||
60f067b4 | 220 | static char* disk_description(const char *path) { |
663996b3 | 221 | |
60f067b4 | 222 | static const char name_fields[] = |
663996b3 MS |
223 | "ID_PART_ENTRY_NAME\0" |
224 | "DM_NAME\0" | |
225 | "ID_MODEL_FROM_DATABASE\0" | |
60f067b4 | 226 | "ID_MODEL\0"; |
663996b3 | 227 | |
60f067b4 JS |
228 | _cleanup_udev_unref_ struct udev *udev = NULL; |
229 | _cleanup_udev_device_unref_ struct udev_device *device = NULL; | |
663996b3 | 230 | struct stat st; |
663996b3 MS |
231 | const char *i; |
232 | ||
233 | assert(path); | |
234 | ||
235 | if (stat(path, &st) < 0) | |
236 | return NULL; | |
237 | ||
238 | if (!S_ISBLK(st.st_mode)) | |
239 | return NULL; | |
240 | ||
241 | udev = udev_new(); | |
242 | if (!udev) | |
243 | return NULL; | |
244 | ||
245 | device = udev_device_new_from_devnum(udev, 'b', st.st_rdev); | |
246 | if (!device) | |
60f067b4 | 247 | return NULL; |
663996b3 MS |
248 | |
249 | NULSTR_FOREACH(i, name_fields) { | |
250 | const char *name; | |
251 | ||
252 | name = udev_device_get_property_value(device, i); | |
60f067b4 JS |
253 | if (!isempty(name)) |
254 | return strdup(name); | |
663996b3 MS |
255 | } |
256 | ||
60f067b4 | 257 | return NULL; |
663996b3 MS |
258 | } |
259 | ||
260 | static char *disk_mount_point(const char *label) { | |
14228c0d | 261 | _cleanup_free_ char *device = NULL; |
60f067b4 | 262 | _cleanup_endmntent_ FILE *f = NULL; |
663996b3 MS |
263 | struct mntent *m; |
264 | ||
265 | /* Yeah, we don't support native systemd unit files here for now */ | |
266 | ||
267 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
60f067b4 | 268 | return NULL; |
663996b3 MS |
269 | |
270 | f = setmntent("/etc/fstab", "r"); | |
271 | if (!f) | |
60f067b4 | 272 | return NULL; |
663996b3 MS |
273 | |
274 | while ((m = getmntent(f))) | |
60f067b4 JS |
275 | if (path_equal(m->mnt_fsname, device)) |
276 | return strdup(m->mnt_dir); | |
663996b3 | 277 | |
60f067b4 | 278 | return NULL; |
663996b3 MS |
279 | } |
280 | ||
14228c0d MB |
281 | static int get_password(const char *name, usec_t until, bool accept_cached, char ***passwords) { |
282 | int r; | |
283 | char **p; | |
284 | _cleanup_free_ char *text = NULL; | |
60f067b4 JS |
285 | _cleanup_free_ char *escaped_name = NULL; |
286 | char *id; | |
14228c0d MB |
287 | |
288 | assert(name); | |
289 | assert(passwords); | |
290 | ||
291 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) | |
292 | return log_oom(); | |
293 | ||
60f067b4 JS |
294 | escaped_name = cescape(name); |
295 | if (!escaped_name) | |
296 | return log_oom(); | |
297 | ||
e735f4d4 | 298 | id = strjoina("cryptsetup:", escaped_name); |
60f067b4 JS |
299 | |
300 | r = ask_password_auto(text, "drive-harddisk", id, until, accept_cached, passwords); | |
f47781d8 MP |
301 | if (r < 0) |
302 | return log_error_errno(r, "Failed to query password: %m"); | |
14228c0d | 303 | |
60f067b4 | 304 | if (arg_verify) { |
14228c0d MB |
305 | _cleanup_strv_free_ char **passwords2 = NULL; |
306 | ||
307 | assert(strv_length(*passwords) == 1); | |
308 | ||
309 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) | |
310 | return log_oom(); | |
311 | ||
e735f4d4 | 312 | id = strjoina("cryptsetup-verification:", escaped_name); |
60f067b4 JS |
313 | |
314 | r = ask_password_auto(text, "drive-harddisk", id, until, false, &passwords2); | |
f47781d8 MP |
315 | if (r < 0) |
316 | return log_error_errno(r, "Failed to query verification password: %m"); | |
14228c0d MB |
317 | |
318 | assert(strv_length(passwords2) == 1); | |
319 | ||
320 | if (!streq(*passwords[0], passwords2[0])) { | |
321 | log_warning("Passwords did not match, retrying."); | |
322 | return -EAGAIN; | |
323 | } | |
324 | } | |
325 | ||
326 | strv_uniq(*passwords); | |
327 | ||
328 | STRV_FOREACH(p, *passwords) { | |
329 | char *c; | |
330 | ||
60f067b4 | 331 | if (strlen(*p)+1 >= arg_key_size) |
14228c0d MB |
332 | continue; |
333 | ||
334 | /* Pad password if necessary */ | |
60f067b4 | 335 | if (!(c = new(char, arg_key_size))) |
14228c0d MB |
336 | return log_oom(); |
337 | ||
60f067b4 | 338 | strncpy(c, *p, arg_key_size); |
14228c0d MB |
339 | free(*p); |
340 | *p = c; | |
341 | } | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | static int attach_tcrypt(struct crypt_device *cd, | |
347 | const char *name, | |
348 | const char *key_file, | |
349 | char **passwords, | |
350 | uint32_t flags) { | |
351 | int r = 0; | |
352 | _cleanup_free_ char *passphrase = NULL; | |
353 | struct crypt_params_tcrypt params = { | |
354 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
60f067b4 JS |
355 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
356 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
14228c0d MB |
357 | }; |
358 | ||
359 | assert(cd); | |
360 | assert(name); | |
e842803a | 361 | assert(key_file || (passwords && passwords[0])); |
14228c0d | 362 | |
60f067b4 | 363 | if (arg_tcrypt_hidden) |
14228c0d MB |
364 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
365 | ||
60f067b4 | 366 | if (arg_tcrypt_system) |
14228c0d MB |
367 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
368 | ||
369 | if (key_file) { | |
370 | r = read_one_line_file(key_file, &passphrase); | |
371 | if (r < 0) { | |
f47781d8 | 372 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
14228c0d MB |
373 | return -EAGAIN; |
374 | } | |
375 | ||
376 | params.passphrase = passphrase; | |
377 | } else | |
378 | params.passphrase = passwords[0]; | |
379 | params.passphrase_size = strlen(params.passphrase); | |
380 | ||
381 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
382 | if (r < 0) { | |
383 | if (key_file && r == -EPERM) { | |
384 | log_error("Failed to activate using password file '%s'.", key_file); | |
385 | return -EAGAIN; | |
386 | } | |
387 | return r; | |
388 | } | |
389 | ||
60f067b4 | 390 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
14228c0d MB |
391 | } |
392 | ||
393 | static int attach_luks_or_plain(struct crypt_device *cd, | |
394 | const char *name, | |
395 | const char *key_file, | |
e735f4d4 | 396 | const char *data_device, |
14228c0d MB |
397 | char **passwords, |
398 | uint32_t flags) { | |
399 | int r = 0; | |
400 | bool pass_volume_key = false; | |
401 | ||
402 | assert(cd); | |
403 | assert(name); | |
404 | assert(key_file || passwords); | |
405 | ||
e735f4d4 | 406 | if (!arg_type || streq(arg_type, CRYPT_LUKS1)) { |
14228c0d | 407 | r = crypt_load(cd, CRYPT_LUKS1, NULL); |
e735f4d4 MP |
408 | if (r < 0) { |
409 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
410 | return r; | |
411 | } | |
412 | ||
413 | if (data_device) | |
414 | r = crypt_set_data_device(cd, data_device); | |
415 | } | |
14228c0d | 416 | |
60f067b4 | 417 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
14228c0d MB |
418 | struct crypt_params_plain params = {}; |
419 | const char *cipher, *cipher_mode; | |
420 | _cleanup_free_ char *truncated_cipher = NULL; | |
421 | ||
60f067b4 | 422 | if (arg_hash) { |
14228c0d | 423 | /* plain isn't a real hash type. it just means "use no hash" */ |
60f067b4 JS |
424 | if (!streq(arg_hash, "plain")) |
425 | params.hash = arg_hash; | |
f47781d8 MP |
426 | } else if (!key_file) |
427 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
428 | * package is to not hash when a key file is provided */ | |
14228c0d MB |
429 | params.hash = "ripemd160"; |
430 | ||
60f067b4 | 431 | if (arg_cipher) { |
14228c0d MB |
432 | size_t l; |
433 | ||
60f067b4 JS |
434 | l = strcspn(arg_cipher, "-"); |
435 | truncated_cipher = strndup(arg_cipher, l); | |
14228c0d MB |
436 | if (!truncated_cipher) |
437 | return log_oom(); | |
438 | ||
439 | cipher = truncated_cipher; | |
60f067b4 | 440 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
14228c0d MB |
441 | } else { |
442 | cipher = "aes"; | |
443 | cipher_mode = "cbc-essiv:sha256"; | |
444 | } | |
445 | ||
446 | /* for CRYPT_PLAIN limit reads | |
447 | * from keyfile to key length, and | |
448 | * ignore keyfile-size */ | |
60f067b4 | 449 | arg_keyfile_size = arg_key_size; |
14228c0d MB |
450 | |
451 | /* In contrast to what the name | |
452 | * crypt_setup() might suggest this | |
453 | * doesn't actually format anything, | |
454 | * it just configures encryption | |
455 | * parameters when used for plain | |
456 | * mode. */ | |
457 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, | |
60f067b4 | 458 | NULL, NULL, arg_keyfile_size, ¶ms); |
14228c0d MB |
459 | |
460 | /* hash == NULL implies the user passed "plain" */ | |
461 | pass_volume_key = (params.hash == NULL); | |
462 | } | |
463 | ||
f47781d8 MP |
464 | if (r < 0) |
465 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
14228c0d MB |
466 | |
467 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
468 | crypt_get_cipher(cd), | |
469 | crypt_get_cipher_mode(cd), | |
470 | crypt_get_volume_key_size(cd)*8, | |
471 | crypt_get_device_name(cd)); | |
472 | ||
473 | if (key_file) { | |
60f067b4 JS |
474 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, |
475 | key_file, arg_keyfile_size, | |
476 | arg_keyfile_offset, flags); | |
14228c0d | 477 | if (r < 0) { |
f47781d8 | 478 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
14228c0d MB |
479 | return -EAGAIN; |
480 | } | |
481 | } else { | |
482 | char **p; | |
483 | ||
484 | STRV_FOREACH(p, passwords) { | |
485 | if (pass_volume_key) | |
60f067b4 | 486 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
14228c0d | 487 | else |
60f067b4 | 488 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
14228c0d MB |
489 | |
490 | if (r >= 0) | |
491 | break; | |
492 | } | |
493 | } | |
494 | ||
495 | return r; | |
496 | } | |
497 | ||
663996b3 MS |
498 | static int help(void) { |
499 | ||
500 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
501 | "%s detach VOLUME\n\n" | |
502 | "Attaches or detaches an encrypted block device.\n", | |
503 | program_invocation_short_name, | |
504 | program_invocation_short_name); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | int main(int argc, char *argv[]) { | |
510 | int r = EXIT_FAILURE; | |
511 | struct crypt_device *cd = NULL; | |
663996b3 MS |
512 | |
513 | if (argc <= 1) { | |
514 | help(); | |
515 | return EXIT_SUCCESS; | |
516 | } | |
517 | ||
518 | if (argc < 3) { | |
519 | log_error("This program requires at least two arguments."); | |
520 | return EXIT_FAILURE; | |
521 | } | |
522 | ||
523 | log_set_target(LOG_TARGET_AUTO); | |
524 | log_parse_environment(); | |
525 | log_open(); | |
526 | ||
527 | umask(0022); | |
528 | ||
529 | if (streq(argv[1], "attach")) { | |
530 | uint32_t flags = 0; | |
531 | int k; | |
14228c0d | 532 | unsigned tries; |
663996b3 MS |
533 | usec_t until; |
534 | crypt_status_info status; | |
14228c0d MB |
535 | const char *key_file = NULL, *name = NULL; |
536 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL; | |
663996b3 MS |
537 | |
538 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ | |
539 | ||
540 | if (argc < 4) { | |
541 | log_error("attach requires at least two arguments."); | |
542 | goto finish; | |
543 | } | |
544 | ||
545 | if (argc >= 5 && | |
546 | argv[4][0] && | |
547 | !streq(argv[4], "-") && | |
548 | !streq(argv[4], "none")) { | |
549 | ||
550 | if (!path_is_absolute(argv[4])) | |
14228c0d | 551 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
663996b3 MS |
552 | else |
553 | key_file = argv[4]; | |
554 | } | |
555 | ||
556 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { | |
557 | if (parse_options(argv[5]) < 0) | |
558 | goto finish; | |
559 | } | |
560 | ||
561 | /* A delicious drop of snake oil */ | |
562 | mlockall(MCL_FUTURE); | |
563 | ||
564 | description = disk_description(argv[3]); | |
565 | mount_point = disk_mount_point(argv[2]); | |
566 | ||
567 | if (description && streq(argv[2], description)) { | |
568 | /* If the description string is simply the | |
569 | * volume name, then let's not show this | |
570 | * twice */ | |
571 | free(description); | |
572 | description = NULL; | |
573 | } | |
574 | ||
5eef597e | 575 | k = 0; |
663996b3 | 576 | if (mount_point && description) |
5eef597e | 577 | k = asprintf(&name_buffer, "%s (%s) on %s", description, argv[2], mount_point); |
663996b3 | 578 | else if (mount_point) |
5eef597e | 579 | k = asprintf(&name_buffer, "%s on %s", argv[2], mount_point); |
663996b3 | 580 | else if (description) |
5eef597e | 581 | k = asprintf(&name_buffer, "%s (%s)", description, argv[2]); |
663996b3 | 582 | |
5eef597e MP |
583 | if (k < 0) { |
584 | log_oom(); | |
585 | goto finish; | |
586 | } | |
663996b3 MS |
587 | name = name_buffer ? name_buffer : argv[2]; |
588 | ||
e735f4d4 MP |
589 | if (arg_header) { |
590 | log_debug("LUKS header: %s", arg_header); | |
591 | k = crypt_init(&cd, arg_header); | |
592 | } else | |
593 | k = crypt_init(&cd, argv[3]); | |
594 | ||
663996b3 | 595 | if (k) { |
f47781d8 | 596 | log_error_errno(k, "crypt_init() failed: %m"); |
663996b3 MS |
597 | goto finish; |
598 | } | |
599 | ||
600 | crypt_set_log_callback(cd, log_glue, NULL); | |
601 | ||
602 | status = crypt_status(cd, argv[2]); | |
603 | if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { | |
604 | log_info("Volume %s already active.", argv[2]); | |
605 | r = EXIT_SUCCESS; | |
606 | goto finish; | |
607 | } | |
608 | ||
60f067b4 | 609 | if (arg_readonly) |
663996b3 MS |
610 | flags |= CRYPT_ACTIVATE_READONLY; |
611 | ||
60f067b4 | 612 | if (arg_discards) |
663996b3 MS |
613 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
614 | ||
60f067b4 JS |
615 | if (arg_timeout > 0) |
616 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
663996b3 MS |
617 | else |
618 | until = 0; | |
619 | ||
60f067b4 | 620 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
663996b3 | 621 | |
14228c0d MB |
622 | if (key_file) { |
623 | struct stat st; | |
663996b3 | 624 | |
14228c0d MB |
625 | /* Ideally we'd do this on the open fd, but since this is just a |
626 | * warning it's OK to do this in two steps. */ | |
e735f4d4 | 627 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
14228c0d | 628 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); |
663996b3 MS |
629 | } |
630 | ||
60f067b4 | 631 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
14228c0d | 632 | _cleanup_strv_free_ char **passwords = NULL; |
663996b3 MS |
633 | |
634 | if (!key_file) { | |
60f067b4 | 635 | k = get_password(name, until, tries == 0 && !arg_verify, &passwords); |
14228c0d | 636 | if (k == -EAGAIN) |
663996b3 | 637 | continue; |
14228c0d MB |
638 | else if (k < 0) |
639 | goto finish; | |
663996b3 MS |
640 | } |
641 | ||
60f067b4 | 642 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
14228c0d MB |
643 | k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
644 | else | |
e735f4d4 MP |
645 | k = attach_luks_or_plain(cd, |
646 | argv[2], | |
647 | key_file, | |
648 | arg_header ? argv[3] : NULL, | |
649 | passwords, | |
650 | flags); | |
663996b3 MS |
651 | if (k >= 0) |
652 | break; | |
14228c0d MB |
653 | else if (k == -EAGAIN) { |
654 | key_file = NULL; | |
655 | continue; | |
656 | } else if (k != -EPERM) { | |
f47781d8 | 657 | log_error_errno(k, "Failed to activate: %m"); |
663996b3 MS |
658 | goto finish; |
659 | } | |
660 | ||
661 | log_warning("Invalid passphrase."); | |
662 | } | |
663 | ||
60f067b4 | 664 | if (arg_tries != 0 && tries >= arg_tries) { |
14228c0d | 665 | log_error("Too many attempts; giving up."); |
663996b3 MS |
666 | r = EXIT_FAILURE; |
667 | goto finish; | |
668 | } | |
669 | ||
670 | } else if (streq(argv[1], "detach")) { | |
671 | int k; | |
672 | ||
673 | k = crypt_init_by_name(&cd, argv[2]); | |
674 | if (k) { | |
f47781d8 | 675 | log_error_errno(k, "crypt_init() failed: %m"); |
663996b3 MS |
676 | goto finish; |
677 | } | |
678 | ||
679 | crypt_set_log_callback(cd, log_glue, NULL); | |
680 | ||
681 | k = crypt_deactivate(cd, argv[2]); | |
682 | if (k < 0) { | |
f47781d8 | 683 | log_error_errno(k, "Failed to deactivate: %m"); |
663996b3 MS |
684 | goto finish; |
685 | } | |
686 | ||
687 | } else { | |
688 | log_error("Unknown verb %s.", argv[1]); | |
689 | goto finish; | |
690 | } | |
691 | ||
692 | r = EXIT_SUCCESS; | |
693 | ||
694 | finish: | |
695 | ||
696 | if (cd) | |
697 | crypt_free(cd); | |
698 | ||
60f067b4 JS |
699 | free(arg_cipher); |
700 | free(arg_hash); | |
e735f4d4 | 701 | free(arg_header); |
60f067b4 | 702 | strv_free(arg_tcrypt_keyfiles); |
663996b3 MS |
703 | |
704 | return r; | |
705 | } |