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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" |
9a97aaae TG |
35 | #include "sd-device.h" |
36 | #include "device-util.h" | |
7f4e0805 | 37 | |
f75cac37 LP |
38 | static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ |
39 | static char *arg_cipher = NULL; | |
40 | static unsigned arg_key_size = 0; | |
41 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
42 | static unsigned arg_keyfile_size = 0; | |
43 | static unsigned arg_keyfile_offset = 0; | |
44 | static char *arg_hash = NULL; | |
7376e835 | 45 | static char *arg_header = NULL; |
f75cac37 LP |
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; | |
4eac2773 MP |
53 | static uint64_t arg_offset = 0; |
54 | static uint64_t arg_skip = 0; | |
f75cac37 | 55 | static usec_t arg_timeout = 0; |
7f4e0805 | 56 | |
1fc76335 LP |
57 | /* Options Debian's crypttab knows we don't: |
58 | ||
1fc76335 LP |
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 */ | |
b9f111b9 | 71 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail")) |
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 | 138 | |
7376e835 AC |
139 | } else if (startswith(option, "header=")) { |
140 | arg_type = CRYPT_LUKS1; | |
141 | ||
142 | if (!path_is_absolute(option+7)) { | |
143 | log_error("Header path '%s' is not absolute, refusing.", option+7); | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | if (arg_header) { | |
148 | log_error("Duplicate header= options, refusing."); | |
149 | return -EINVAL; | |
150 | } | |
151 | ||
152 | arg_header = strdup(option+7); | |
153 | if (!arg_header) | |
154 | return log_oom(); | |
155 | ||
7f4e0805 LP |
156 | } else if (startswith(option, "tries=")) { |
157 | ||
f75cac37 | 158 | if (safe_atou(option+6, &arg_tries) < 0) { |
7f4e0805 LP |
159 | log_error("tries= parse failure, ignoring."); |
160 | return 0; | |
161 | } | |
162 | ||
f75cac37 LP |
163 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
164 | arg_readonly = true; | |
7f4e0805 | 165 | else if (streq(option, "verify")) |
f75cac37 LP |
166 | arg_verify = true; |
167 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
168 | arg_discards = true; | |
260ab287 | 169 | else if (streq(option, "luks")) |
f75cac37 | 170 | arg_type = CRYPT_LUKS1; |
8cf3ca80 | 171 | else if (streq(option, "tcrypt")) |
f75cac37 | 172 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 173 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
174 | arg_type = CRYPT_TCRYPT; |
175 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 176 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
177 | arg_type = CRYPT_TCRYPT; |
178 | arg_tcrypt_system = true; | |
179 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) | |
180 | arg_type = CRYPT_PLAIN; | |
7f4e0805 LP |
181 | else if (startswith(option, "timeout=")) { |
182 | ||
f75cac37 | 183 | if (parse_sec(option+8, &arg_timeout) < 0) { |
7f4e0805 LP |
184 | log_error("timeout= parse failure, ignoring."); |
185 | return 0; | |
186 | } | |
187 | ||
4eac2773 MP |
188 | } else if (startswith(option, "offset=")) { |
189 | ||
190 | if (safe_atou64(option+7, &arg_offset) < 0) { | |
191 | log_error("offset= parse failure, refusing."); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | } else if (startswith(option, "skip=")) { | |
196 | ||
197 | if (safe_atou64(option+5, &arg_skip) < 0) { | |
198 | log_error("skip= parse failure, refusing."); | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
41e6f28a | 202 | } else if (!streq(option, "none")) |
7f4e0805 LP |
203 | log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int parse_options(const char *options) { | |
a2a5291b | 209 | const char *word, *state; |
7f4e0805 | 210 | size_t l; |
74b1c371 | 211 | int r; |
7f4e0805 LP |
212 | |
213 | assert(options); | |
214 | ||
a2a5291b | 215 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 216 | _cleanup_free_ char *o; |
7f4e0805 | 217 | |
a2a5291b | 218 | o = strndup(word, l); |
74b1c371 | 219 | if (!o) |
7f4e0805 | 220 | return -ENOMEM; |
7f4e0805 | 221 | r = parse_one_option(o); |
7f4e0805 LP |
222 | if (r < 0) |
223 | return r; | |
224 | } | |
225 | ||
4eac2773 MP |
226 | /* sanity-check options */ |
227 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
228 | if (arg_offset) | |
229 | log_warning("offset= ignored with type %s", arg_type); | |
230 | if (arg_skip) | |
231 | log_warning("skip= ignored with type %s", arg_type); | |
232 | } | |
233 | ||
7f4e0805 LP |
234 | return 0; |
235 | } | |
236 | ||
237 | static void log_glue(int level, const char *msg, void *usrptr) { | |
260ab287 | 238 | log_debug("%s", msg); |
7f4e0805 | 239 | } |
e23a0ce8 | 240 | |
e51b9486 HH |
241 | static int disk_major_minor(const char *path, char **ret) { |
242 | struct stat st; | |
243 | ||
244 | assert(path); | |
245 | ||
246 | if (stat(path, &st) < 0) | |
247 | return -errno; | |
248 | ||
249 | if (!S_ISBLK(st.st_mode)) | |
250 | return -EINVAL; | |
251 | ||
252 | if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
253 | return -errno; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
1ca208fb | 258 | static char* disk_description(const char *path) { |
74b1c371 | 259 | |
f75cac37 | 260 | static const char name_fields[] = |
74b1c371 LP |
261 | "ID_PART_ENTRY_NAME\0" |
262 | "DM_NAME\0" | |
263 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 264 | "ID_MODEL\0"; |
74b1c371 | 265 | |
9a97aaae | 266 | _cleanup_device_unref_ sd_device *device = NULL; |
b1a2da0a | 267 | struct stat st; |
74b1c371 | 268 | const char *i; |
9a97aaae | 269 | int r; |
b1a2da0a LP |
270 | |
271 | assert(path); | |
272 | ||
273 | if (stat(path, &st) < 0) | |
274 | return NULL; | |
275 | ||
276 | if (!S_ISBLK(st.st_mode)) | |
277 | return NULL; | |
278 | ||
9a97aaae TG |
279 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
280 | if (r < 0) | |
1ca208fb | 281 | return NULL; |
b1a2da0a | 282 | |
74b1c371 LP |
283 | NULSTR_FOREACH(i, name_fields) { |
284 | const char *name; | |
285 | ||
9a97aaae TG |
286 | r = sd_device_get_property_value(device, i, &name); |
287 | if (r >= 0 && !isempty(name)) | |
1ca208fb | 288 | return strdup(name); |
74b1c371 | 289 | } |
b1a2da0a | 290 | |
1ca208fb | 291 | return NULL; |
b1a2da0a LP |
292 | } |
293 | ||
b61e476f | 294 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 295 | _cleanup_free_ char *device = NULL; |
5862d652 | 296 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
297 | struct mntent *m; |
298 | ||
299 | /* Yeah, we don't support native systemd unit files here for now */ | |
300 | ||
301 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 302 | return NULL; |
b61e476f | 303 | |
e0295d26 LP |
304 | f = setmntent("/etc/fstab", "r"); |
305 | if (!f) | |
5862d652 | 306 | return NULL; |
b61e476f LP |
307 | |
308 | while ((m = getmntent(f))) | |
5862d652 ZJS |
309 | if (path_equal(m->mnt_fsname, device)) |
310 | return strdup(m->mnt_dir); | |
b61e476f | 311 | |
5862d652 | 312 | return NULL; |
b61e476f LP |
313 | } |
314 | ||
e51b9486 HH |
315 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***passwords) { |
316 | int r = 0; | |
e7d90b71 JJ |
317 | char **p; |
318 | _cleanup_free_ char *text = NULL; | |
9fa1de96 DH |
319 | _cleanup_free_ char *escaped_name = NULL; |
320 | char *id; | |
e51b9486 HH |
321 | const char *name = NULL; |
322 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, | |
323 | *mount_point = NULL, *maj_min = NULL; | |
e7d90b71 | 324 | |
e51b9486 HH |
325 | assert(vol); |
326 | assert(src); | |
e7d90b71 JJ |
327 | assert(passwords); |
328 | ||
e51b9486 HH |
329 | description = disk_description(src); |
330 | mount_point = disk_mount_point(vol); | |
331 | ||
ece174c5 | 332 | if (description && streq(vol, description)) |
e51b9486 HH |
333 | /* If the description string is simply the |
334 | * volume name, then let's not show this | |
335 | * twice */ | |
97b11eed | 336 | description = mfree(description); |
e51b9486 HH |
337 | |
338 | if (mount_point && description) | |
339 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
340 | else if (mount_point) | |
341 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
342 | else if (description) | |
343 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
344 | ||
345 | if (r < 0) | |
346 | return log_oom(); | |
347 | ||
348 | name = name_buffer ? name_buffer : vol; | |
349 | ||
e7d90b71 JJ |
350 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
351 | return log_oom(); | |
352 | ||
e51b9486 HH |
353 | if (src) |
354 | (void) disk_major_minor(src, &maj_min); | |
355 | ||
356 | if (maj_min) { | |
357 | escaped_name = maj_min; | |
358 | maj_min = NULL; | |
359 | } else | |
360 | escaped_name = cescape(name); | |
361 | ||
9fa1de96 DH |
362 | if (!escaped_name) |
363 | return log_oom(); | |
364 | ||
63c372cb | 365 | id = strjoina("cryptsetup:", escaped_name); |
9fa1de96 DH |
366 | |
367 | r = ask_password_auto(text, "drive-harddisk", id, until, accept_cached, passwords); | |
23bbb0de MS |
368 | if (r < 0) |
369 | return log_error_errno(r, "Failed to query password: %m"); | |
e7d90b71 | 370 | |
f75cac37 | 371 | if (arg_verify) { |
e7d90b71 JJ |
372 | _cleanup_strv_free_ char **passwords2 = NULL; |
373 | ||
374 | assert(strv_length(*passwords) == 1); | |
375 | ||
376 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) | |
377 | return log_oom(); | |
378 | ||
63c372cb | 379 | id = strjoina("cryptsetup-verification:", escaped_name); |
9fa1de96 DH |
380 | |
381 | r = ask_password_auto(text, "drive-harddisk", id, until, false, &passwords2); | |
23bbb0de MS |
382 | if (r < 0) |
383 | return log_error_errno(r, "Failed to query verification password: %m"); | |
e7d90b71 JJ |
384 | |
385 | assert(strv_length(passwords2) == 1); | |
386 | ||
387 | if (!streq(*passwords[0], passwords2[0])) { | |
388 | log_warning("Passwords did not match, retrying."); | |
389 | return -EAGAIN; | |
390 | } | |
391 | } | |
392 | ||
393 | strv_uniq(*passwords); | |
394 | ||
395 | STRV_FOREACH(p, *passwords) { | |
396 | char *c; | |
397 | ||
f75cac37 | 398 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
399 | continue; |
400 | ||
401 | /* Pad password if necessary */ | |
f75cac37 | 402 | if (!(c = new(char, arg_key_size))) |
e7d90b71 JJ |
403 | return log_oom(); |
404 | ||
f75cac37 | 405 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
406 | free(*p); |
407 | *p = c; | |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
8cf3ca80 JJ |
413 | static int attach_tcrypt(struct crypt_device *cd, |
414 | const char *name, | |
415 | const char *key_file, | |
416 | char **passwords, | |
417 | uint32_t flags) { | |
418 | int r = 0; | |
419 | _cleanup_free_ char *passphrase = NULL; | |
420 | struct crypt_params_tcrypt params = { | |
421 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
422 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
423 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
424 | }; |
425 | ||
426 | assert(cd); | |
427 | assert(name); | |
f268f57f | 428 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 429 | |
f75cac37 | 430 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
431 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
432 | ||
f75cac37 | 433 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
434 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
435 | ||
436 | if (key_file) { | |
437 | r = read_one_line_file(key_file, &passphrase); | |
438 | if (r < 0) { | |
da927ba9 | 439 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
440 | return -EAGAIN; |
441 | } | |
442 | ||
443 | params.passphrase = passphrase; | |
444 | } else | |
445 | params.passphrase = passwords[0]; | |
446 | params.passphrase_size = strlen(params.passphrase); | |
447 | ||
448 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
449 | if (r < 0) { | |
450 | if (key_file && r == -EPERM) { | |
451 | log_error("Failed to activate using password file '%s'.", key_file); | |
452 | return -EAGAIN; | |
453 | } | |
454 | return r; | |
455 | } | |
456 | ||
ac1a87b9 | 457 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
458 | } |
459 | ||
10fb4e35 JJ |
460 | static int attach_luks_or_plain(struct crypt_device *cd, |
461 | const char *name, | |
462 | const char *key_file, | |
7376e835 | 463 | const char *data_device, |
10fb4e35 JJ |
464 | char **passwords, |
465 | uint32_t flags) { | |
466 | int r = 0; | |
467 | bool pass_volume_key = false; | |
468 | ||
469 | assert(cd); | |
470 | assert(name); | |
471 | assert(key_file || passwords); | |
472 | ||
7376e835 | 473 | if (!arg_type || streq(arg_type, CRYPT_LUKS1)) { |
10fb4e35 | 474 | r = crypt_load(cd, CRYPT_LUKS1, NULL); |
7376e835 AC |
475 | if (r < 0) { |
476 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
477 | return r; | |
478 | } | |
479 | ||
480 | if (data_device) | |
481 | r = crypt_set_data_device(cd, data_device); | |
482 | } | |
10fb4e35 | 483 | |
f75cac37 | 484 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
485 | struct crypt_params_plain params = { |
486 | .offset = arg_offset, | |
487 | .skip = arg_skip, | |
488 | }; | |
10fb4e35 JJ |
489 | const char *cipher, *cipher_mode; |
490 | _cleanup_free_ char *truncated_cipher = NULL; | |
491 | ||
f75cac37 | 492 | if (arg_hash) { |
10fb4e35 | 493 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
494 | if (!streq(arg_hash, "plain")) |
495 | params.hash = arg_hash; | |
8a52210c ZJS |
496 | } else if (!key_file) |
497 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
498 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
499 | params.hash = "ripemd160"; |
500 | ||
f75cac37 | 501 | if (arg_cipher) { |
10fb4e35 JJ |
502 | size_t l; |
503 | ||
f75cac37 LP |
504 | l = strcspn(arg_cipher, "-"); |
505 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
506 | if (!truncated_cipher) |
507 | return log_oom(); | |
508 | ||
509 | cipher = truncated_cipher; | |
f75cac37 | 510 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
511 | } else { |
512 | cipher = "aes"; | |
513 | cipher_mode = "cbc-essiv:sha256"; | |
514 | } | |
515 | ||
516 | /* for CRYPT_PLAIN limit reads | |
517 | * from keyfile to key length, and | |
518 | * ignore keyfile-size */ | |
6131a78b | 519 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
520 | |
521 | /* In contrast to what the name | |
522 | * crypt_setup() might suggest this | |
523 | * doesn't actually format anything, | |
524 | * it just configures encryption | |
525 | * parameters when used for plain | |
526 | * mode. */ | |
527 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, | |
f75cac37 | 528 | NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
529 | |
530 | /* hash == NULL implies the user passed "plain" */ | |
531 | pass_volume_key = (params.hash == NULL); | |
532 | } | |
533 | ||
23bbb0de MS |
534 | if (r < 0) |
535 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
536 | |
537 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
538 | crypt_get_cipher(cd), | |
539 | crypt_get_cipher_mode(cd), | |
540 | crypt_get_volume_key_size(cd)*8, | |
541 | crypt_get_device_name(cd)); | |
542 | ||
543 | if (key_file) { | |
f75cac37 LP |
544 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, |
545 | key_file, arg_keyfile_size, | |
546 | arg_keyfile_offset, flags); | |
10fb4e35 | 547 | if (r < 0) { |
da927ba9 | 548 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
549 | return -EAGAIN; |
550 | } | |
551 | } else { | |
552 | char **p; | |
553 | ||
554 | STRV_FOREACH(p, passwords) { | |
555 | if (pass_volume_key) | |
f75cac37 | 556 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 557 | else |
f75cac37 | 558 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
559 | |
560 | if (r >= 0) | |
561 | break; | |
562 | } | |
563 | } | |
564 | ||
565 | return r; | |
566 | } | |
567 | ||
dd5e696d LP |
568 | static int help(void) { |
569 | ||
570 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
571 | "%s detach VOLUME\n\n" | |
572 | "Attaches or detaches an encrypted block device.\n", | |
573 | program_invocation_short_name, | |
574 | program_invocation_short_name); | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
e23a0ce8 | 579 | int main(int argc, char *argv[]) { |
7f4e0805 LP |
580 | int r = EXIT_FAILURE; |
581 | struct crypt_device *cd = NULL; | |
e23a0ce8 | 582 | |
dd5e696d LP |
583 | if (argc <= 1) { |
584 | help(); | |
585 | return EXIT_SUCCESS; | |
586 | } | |
587 | ||
e23a0ce8 LP |
588 | if (argc < 3) { |
589 | log_error("This program requires at least two arguments."); | |
590 | return EXIT_FAILURE; | |
591 | } | |
592 | ||
bb7df0da | 593 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
594 | log_parse_environment(); |
595 | log_open(); | |
596 | ||
4c12626c LP |
597 | umask(0022); |
598 | ||
260ab287 | 599 | if (streq(argv[1], "attach")) { |
7f4e0805 LP |
600 | uint32_t flags = 0; |
601 | int k; | |
10fb4e35 | 602 | unsigned tries; |
260ab287 | 603 | usec_t until; |
e2d480b9 | 604 | crypt_status_info status; |
e51b9486 | 605 | const char *key_file = NULL; |
7f4e0805 | 606 | |
b61e476f LP |
607 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
608 | ||
7f4e0805 LP |
609 | if (argc < 4) { |
610 | log_error("attach requires at least two arguments."); | |
611 | goto finish; | |
612 | } | |
613 | ||
1fc76335 LP |
614 | if (argc >= 5 && |
615 | argv[4][0] && | |
616 | !streq(argv[4], "-") && | |
617 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
618 | |
619 | if (!path_is_absolute(argv[4])) | |
8cf3ca80 | 620 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
621 | else |
622 | key_file = argv[4]; | |
623 | } | |
624 | ||
74b1c371 LP |
625 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
626 | if (parse_options(argv[5]) < 0) | |
627 | goto finish; | |
628 | } | |
e23a0ce8 | 629 | |
b853f6e9 LP |
630 | /* A delicious drop of snake oil */ |
631 | mlockall(MCL_FUTURE); | |
632 | ||
7376e835 AC |
633 | if (arg_header) { |
634 | log_debug("LUKS header: %s", arg_header); | |
635 | k = crypt_init(&cd, arg_header); | |
636 | } else | |
637 | k = crypt_init(&cd, argv[3]); | |
638 | ||
74b1c371 | 639 | if (k) { |
da927ba9 | 640 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
641 | goto finish; |
642 | } | |
e23a0ce8 | 643 | |
7f4e0805 | 644 | crypt_set_log_callback(cd, log_glue, NULL); |
7f4e0805 | 645 | |
260ab287 LP |
646 | status = crypt_status(cd, argv[2]); |
647 | if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { | |
648 | log_info("Volume %s already active.", argv[2]); | |
649 | r = EXIT_SUCCESS; | |
7f4e0805 LP |
650 | goto finish; |
651 | } | |
652 | ||
f75cac37 | 653 | if (arg_readonly) |
7f4e0805 LP |
654 | flags |= CRYPT_ACTIVATE_READONLY; |
655 | ||
f75cac37 | 656 | if (arg_discards) |
2a2aab60 MM |
657 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
658 | ||
f75cac37 LP |
659 | if (arg_timeout > 0) |
660 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
7dcda352 LP |
661 | else |
662 | until = 0; | |
260ab287 | 663 | |
6131a78b | 664 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 665 | |
10fb4e35 JJ |
666 | if (key_file) { |
667 | struct stat st; | |
e2d480b9 | 668 | |
10fb4e35 JJ |
669 | /* Ideally we'd do this on the open fd, but since this is just a |
670 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
671 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
672 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
673 | } |
674 | ||
f75cac37 | 675 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
e7d90b71 | 676 | _cleanup_strv_free_ char **passwords = NULL; |
260ab287 LP |
677 | |
678 | if (!key_file) { | |
e51b9486 | 679 | k = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
e7d90b71 JJ |
680 | if (k == -EAGAIN) |
681 | continue; | |
682 | else if (k < 0) | |
260ab287 | 683 | goto finish; |
260ab287 LP |
684 | } |
685 | ||
f75cac37 | 686 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
8cf3ca80 JJ |
687 | k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
688 | else | |
7376e835 AC |
689 | k = attach_luks_or_plain(cd, |
690 | argv[2], | |
691 | key_file, | |
692 | arg_header ? argv[3] : NULL, | |
693 | passwords, | |
694 | flags); | |
260ab287 LP |
695 | if (k >= 0) |
696 | break; | |
10fb4e35 JJ |
697 | else if (k == -EAGAIN) { |
698 | key_file = NULL; | |
699 | continue; | |
700 | } else if (k != -EPERM) { | |
da927ba9 | 701 | log_error_errno(k, "Failed to activate: %m"); |
260ab287 LP |
702 | goto finish; |
703 | } | |
704 | ||
705 | log_warning("Invalid passphrase."); | |
7f4e0805 LP |
706 | } |
707 | ||
f75cac37 | 708 | if (arg_tries != 0 && tries >= arg_tries) { |
10fb4e35 | 709 | log_error("Too many attempts; giving up."); |
260ab287 | 710 | r = EXIT_FAILURE; |
bd40a2d8 | 711 | goto finish; |
7f4e0805 LP |
712 | } |
713 | ||
714 | } else if (streq(argv[1], "detach")) { | |
715 | int k; | |
716 | ||
74b1c371 LP |
717 | k = crypt_init_by_name(&cd, argv[2]); |
718 | if (k) { | |
da927ba9 | 719 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
720 | goto finish; |
721 | } | |
722 | ||
723 | crypt_set_log_callback(cd, log_glue, NULL); | |
724 | ||
74b1c371 LP |
725 | k = crypt_deactivate(cd, argv[2]); |
726 | if (k < 0) { | |
da927ba9 | 727 | log_error_errno(k, "Failed to deactivate: %m"); |
7f4e0805 LP |
728 | goto finish; |
729 | } | |
e23a0ce8 LP |
730 | |
731 | } else { | |
732 | log_error("Unknown verb %s.", argv[1]); | |
733 | goto finish; | |
734 | } | |
735 | ||
7f4e0805 LP |
736 | r = EXIT_SUCCESS; |
737 | ||
e23a0ce8 | 738 | finish: |
7f4e0805 LP |
739 | |
740 | if (cd) | |
741 | crypt_free(cd); | |
742 | ||
f75cac37 LP |
743 | free(arg_cipher); |
744 | free(arg_hash); | |
7376e835 | 745 | free(arg_header); |
f75cac37 | 746 | strv_free(arg_tcrypt_keyfiles); |
260ab287 | 747 | |
e23a0ce8 LP |
748 | return r; |
749 | } |