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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e23a0ce8 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
e23a0ce8 LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
e23a0ce8 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
e23a0ce8 LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
7f4e0805 | 21 | #include <errno.h> |
7f4e0805 | 22 | #include <libcryptsetup.h> |
07630cea LP |
23 | #include <mntent.h> |
24 | #include <string.h> | |
25 | #include <sys/mman.h> | |
e23a0ce8 | 26 | |
4f5dd394 LP |
27 | #include "sd-device.h" |
28 | ||
b5efdb8a | 29 | #include "alloc-util.h" |
4f5dd394 | 30 | #include "ask-password-api.h" |
294bd454 | 31 | #include "crypt-util.h" |
4f5dd394 LP |
32 | #include "device-util.h" |
33 | #include "escape.h" | |
8cf3ca80 | 34 | #include "fileio.h" |
e23a0ce8 | 35 | #include "log.h" |
4349cd7c | 36 | #include "mount-util.h" |
6bedfcbb | 37 | #include "parse-util.h" |
9eb977db | 38 | #include "path-util.h" |
07630cea | 39 | #include "string-util.h" |
21bc923a | 40 | #include "strv.h" |
4f5dd394 | 41 | #include "util.h" |
7f4e0805 | 42 | |
b3b4ebab OK |
43 | /* libcryptsetup define for any LUKS version, compatible with libcryptsetup 1.x */ |
44 | #ifndef CRYPT_LUKS | |
45 | #define CRYPT_LUKS NULL | |
46 | #endif | |
47 | ||
48 | /* internal helper */ | |
49 | #define ANY_LUKS "LUKS" | |
50 | ||
51 | static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */ | |
f75cac37 LP |
52 | static char *arg_cipher = NULL; |
53 | static unsigned arg_key_size = 0; | |
54 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
55 | static unsigned arg_keyfile_size = 0; | |
56 | static unsigned arg_keyfile_offset = 0; | |
57 | static char *arg_hash = NULL; | |
7376e835 | 58 | static char *arg_header = NULL; |
f75cac37 LP |
59 | static unsigned arg_tries = 3; |
60 | static bool arg_readonly = false; | |
61 | static bool arg_verify = false; | |
62 | static bool arg_discards = false; | |
63 | static bool arg_tcrypt_hidden = false; | |
64 | static bool arg_tcrypt_system = false; | |
2e914ef4 | 65 | #ifdef CRYPT_TCRYPT_VERA_MODES |
52028838 | 66 | static bool arg_tcrypt_veracrypt = false; |
2e914ef4 | 67 | #endif |
f75cac37 | 68 | static char **arg_tcrypt_keyfiles = NULL; |
4eac2773 MP |
69 | static uint64_t arg_offset = 0; |
70 | static uint64_t arg_skip = 0; | |
0864d311 | 71 | static usec_t arg_timeout = USEC_INFINITY; |
7f4e0805 | 72 | |
1fc76335 LP |
73 | /* Options Debian's crypttab knows we don't: |
74 | ||
1fc76335 LP |
75 | precheck= |
76 | check= | |
77 | checkargs= | |
78 | noearly= | |
79 | loud= | |
80 | keyscript= | |
81 | */ | |
82 | ||
7f4e0805 | 83 | static int parse_one_option(const char *option) { |
fb4650aa ZJS |
84 | const char *val; |
85 | int r; | |
86 | ||
7f4e0805 LP |
87 | assert(option); |
88 | ||
89 | /* Handled outside of this tool */ | |
f7576eb9 | 90 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev")) |
7f4e0805 LP |
91 | return 0; |
92 | ||
fb4650aa ZJS |
93 | if ((val = startswith(option, "cipher="))) { |
94 | r = free_and_strdup(&arg_cipher, val); | |
95 | if (r < 0) | |
4b93637f | 96 | return log_oom(); |
7f4e0805 | 97 | |
fb4650aa | 98 | } else if ((val = startswith(option, "size="))) { |
7f4e0805 | 99 | |
fb4650aa ZJS |
100 | r = safe_atou(val, &arg_key_size); |
101 | if (r < 0) { | |
102 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
103 | return 0; |
104 | } | |
105 | ||
6131a78b DH |
106 | if (arg_key_size % 8) { |
107 | log_error("size= not a multiple of 8, ignoring."); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | arg_key_size /= 8; | |
112 | ||
fb4650aa | 113 | } else if ((val = startswith(option, "key-slot="))) { |
b4a11878 | 114 | |
b3b4ebab | 115 | arg_type = ANY_LUKS; |
fb4650aa ZJS |
116 | r = safe_atoi(val, &arg_key_slot); |
117 | if (r < 0) { | |
118 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
b4a11878 CS |
119 | return 0; |
120 | } | |
121 | ||
fb4650aa | 122 | } else if ((val = startswith(option, "tcrypt-keyfile="))) { |
8cf3ca80 | 123 | |
f75cac37 | 124 | arg_type = CRYPT_TCRYPT; |
fb4650aa ZJS |
125 | if (path_is_absolute(val)) { |
126 | if (strv_extend(&arg_tcrypt_keyfiles, val) < 0) | |
4b93637f LP |
127 | return log_oom(); |
128 | } else | |
fb4650aa | 129 | log_error("Key file path \"%s\" is not absolute. Ignoring.", val); |
8cf3ca80 | 130 | |
fb4650aa | 131 | } else if ((val = startswith(option, "keyfile-size="))) { |
4271d823 | 132 | |
fb4650aa ZJS |
133 | r = safe_atou(val, &arg_keyfile_size); |
134 | if (r < 0) { | |
135 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
4271d823 TG |
136 | return 0; |
137 | } | |
138 | ||
fb4650aa | 139 | } else if ((val = startswith(option, "keyfile-offset="))) { |
880a599e | 140 | |
fb4650aa ZJS |
141 | r = safe_atou(val, &arg_keyfile_offset); |
142 | if (r < 0) { | |
143 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
880a599e TG |
144 | return 0; |
145 | } | |
146 | ||
fb4650aa ZJS |
147 | } else if ((val = startswith(option, "hash="))) { |
148 | r = free_and_strdup(&arg_hash, val); | |
149 | if (r < 0) | |
4b93637f | 150 | return log_oom(); |
7f4e0805 | 151 | |
fb4650aa | 152 | } else if ((val = startswith(option, "header="))) { |
b3b4ebab | 153 | arg_type = ANY_LUKS; |
7376e835 | 154 | |
fb4650aa ZJS |
155 | if (!path_is_absolute(val)) { |
156 | log_error("Header path \"%s\" is not absolute, refusing.", val); | |
7376e835 AC |
157 | return -EINVAL; |
158 | } | |
159 | ||
160 | if (arg_header) { | |
fb4650aa | 161 | log_error("Duplicate header= option, refusing."); |
7376e835 AC |
162 | return -EINVAL; |
163 | } | |
164 | ||
fb4650aa | 165 | arg_header = strdup(val); |
7376e835 AC |
166 | if (!arg_header) |
167 | return log_oom(); | |
168 | ||
fb4650aa | 169 | } else if ((val = startswith(option, "tries="))) { |
7f4e0805 | 170 | |
fb4650aa ZJS |
171 | r = safe_atou(val, &arg_tries); |
172 | if (r < 0) { | |
173 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
174 | return 0; |
175 | } | |
176 | ||
f75cac37 LP |
177 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
178 | arg_readonly = true; | |
7f4e0805 | 179 | else if (streq(option, "verify")) |
f75cac37 LP |
180 | arg_verify = true; |
181 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
182 | arg_discards = true; | |
260ab287 | 183 | else if (streq(option, "luks")) |
b3b4ebab | 184 | arg_type = ANY_LUKS; |
8cf3ca80 | 185 | else if (streq(option, "tcrypt")) |
f75cac37 | 186 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 187 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
188 | arg_type = CRYPT_TCRYPT; |
189 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 190 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
191 | arg_type = CRYPT_TCRYPT; |
192 | arg_tcrypt_system = true; | |
52028838 GH |
193 | } else if (streq(option, "tcrypt-veracrypt")) { |
194 | #ifdef CRYPT_TCRYPT_VERA_MODES | |
195 | arg_type = CRYPT_TCRYPT; | |
196 | arg_tcrypt_veracrypt = true; | |
197 | #else | |
198 | log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing."); | |
199 | return -EINVAL; | |
200 | #endif | |
f75cac37 LP |
201 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) |
202 | arg_type = CRYPT_PLAIN; | |
fb4650aa | 203 | else if ((val = startswith(option, "timeout="))) { |
7f4e0805 | 204 | |
0004f698 | 205 | r = parse_sec_fix_0(val, &arg_timeout); |
fb4650aa ZJS |
206 | if (r < 0) { |
207 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
208 | return 0; |
209 | } | |
210 | ||
fb4650aa | 211 | } else if ((val = startswith(option, "offset="))) { |
4eac2773 | 212 | |
fb4650aa ZJS |
213 | r = safe_atou64(val, &arg_offset); |
214 | if (r < 0) | |
215 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 216 | |
fb4650aa | 217 | } else if ((val = startswith(option, "skip="))) { |
4eac2773 | 218 | |
fb4650aa ZJS |
219 | r = safe_atou64(val, &arg_skip); |
220 | if (r < 0) | |
221 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 222 | |
41e6f28a | 223 | } else if (!streq(option, "none")) |
fb4650aa | 224 | log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
7f4e0805 LP |
225 | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int parse_options(const char *options) { | |
a2a5291b | 230 | const char *word, *state; |
7f4e0805 | 231 | size_t l; |
74b1c371 | 232 | int r; |
7f4e0805 LP |
233 | |
234 | assert(options); | |
235 | ||
a2a5291b | 236 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 237 | _cleanup_free_ char *o; |
7f4e0805 | 238 | |
a2a5291b | 239 | o = strndup(word, l); |
74b1c371 | 240 | if (!o) |
7f4e0805 | 241 | return -ENOMEM; |
7f4e0805 | 242 | r = parse_one_option(o); |
7f4e0805 LP |
243 | if (r < 0) |
244 | return r; | |
245 | } | |
246 | ||
4eac2773 MP |
247 | /* sanity-check options */ |
248 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
249 | if (arg_offset) | |
250 | log_warning("offset= ignored with type %s", arg_type); | |
251 | if (arg_skip) | |
252 | log_warning("skip= ignored with type %s", arg_type); | |
253 | } | |
254 | ||
7f4e0805 LP |
255 | return 0; |
256 | } | |
257 | ||
e51b9486 HH |
258 | static int disk_major_minor(const char *path, char **ret) { |
259 | struct stat st; | |
260 | ||
261 | assert(path); | |
262 | ||
263 | if (stat(path, &st) < 0) | |
264 | return -errno; | |
265 | ||
266 | if (!S_ISBLK(st.st_mode)) | |
267 | return -EINVAL; | |
268 | ||
269 | if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
270 | return -errno; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
1ca208fb | 275 | static char* disk_description(const char *path) { |
74b1c371 | 276 | |
f75cac37 | 277 | static const char name_fields[] = |
74b1c371 LP |
278 | "ID_PART_ENTRY_NAME\0" |
279 | "DM_NAME\0" | |
280 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 281 | "ID_MODEL\0"; |
74b1c371 | 282 | |
4afd3348 | 283 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
b1a2da0a | 284 | struct stat st; |
74b1c371 | 285 | const char *i; |
9a97aaae | 286 | int r; |
b1a2da0a LP |
287 | |
288 | assert(path); | |
289 | ||
290 | if (stat(path, &st) < 0) | |
291 | return NULL; | |
292 | ||
293 | if (!S_ISBLK(st.st_mode)) | |
294 | return NULL; | |
295 | ||
9a97aaae TG |
296 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
297 | if (r < 0) | |
1ca208fb | 298 | return NULL; |
b1a2da0a | 299 | |
74b1c371 LP |
300 | NULSTR_FOREACH(i, name_fields) { |
301 | const char *name; | |
302 | ||
9a97aaae TG |
303 | r = sd_device_get_property_value(device, i, &name); |
304 | if (r >= 0 && !isempty(name)) | |
1ca208fb | 305 | return strdup(name); |
74b1c371 | 306 | } |
b1a2da0a | 307 | |
1ca208fb | 308 | return NULL; |
b1a2da0a LP |
309 | } |
310 | ||
b61e476f | 311 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 312 | _cleanup_free_ char *device = NULL; |
5862d652 | 313 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
314 | struct mntent *m; |
315 | ||
316 | /* Yeah, we don't support native systemd unit files here for now */ | |
317 | ||
318 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 319 | return NULL; |
b61e476f | 320 | |
9ffcff0e | 321 | f = setmntent("/etc/fstab", "re"); |
e0295d26 | 322 | if (!f) |
5862d652 | 323 | return NULL; |
b61e476f LP |
324 | |
325 | while ((m = getmntent(f))) | |
5862d652 ZJS |
326 | if (path_equal(m->mnt_fsname, device)) |
327 | return strdup(m->mnt_dir); | |
b61e476f | 328 | |
5862d652 | 329 | return NULL; |
b61e476f LP |
330 | } |
331 | ||
1602b008 | 332 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { |
e287086b | 333 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL; |
ab84f5b9 | 334 | _cleanup_strv_free_erase_ char **passwords = NULL; |
e51b9486 | 335 | const char *name = NULL; |
e287086b LP |
336 | char **p, *id; |
337 | int r = 0; | |
e7d90b71 | 338 | |
e51b9486 HH |
339 | assert(vol); |
340 | assert(src); | |
1602b008 | 341 | assert(ret); |
e7d90b71 | 342 | |
e51b9486 HH |
343 | description = disk_description(src); |
344 | mount_point = disk_mount_point(vol); | |
345 | ||
ece174c5 | 346 | if (description && streq(vol, description)) |
e51b9486 HH |
347 | /* If the description string is simply the |
348 | * volume name, then let's not show this | |
349 | * twice */ | |
97b11eed | 350 | description = mfree(description); |
e51b9486 HH |
351 | |
352 | if (mount_point && description) | |
353 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
354 | else if (mount_point) | |
355 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
356 | else if (description) | |
357 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
358 | ||
359 | if (r < 0) | |
360 | return log_oom(); | |
361 | ||
362 | name = name_buffer ? name_buffer : vol; | |
363 | ||
e7d90b71 JJ |
364 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
365 | return log_oom(); | |
366 | ||
e51b9486 HH |
367 | if (src) |
368 | (void) disk_major_minor(src, &maj_min); | |
369 | ||
370 | if (maj_min) { | |
371 | escaped_name = maj_min; | |
372 | maj_min = NULL; | |
373 | } else | |
374 | escaped_name = cescape(name); | |
375 | ||
9fa1de96 DH |
376 | if (!escaped_name) |
377 | return log_oom(); | |
378 | ||
63c372cb | 379 | id = strjoina("cryptsetup:", escaped_name); |
9fa1de96 | 380 | |
ab84f5b9 ZJS |
381 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, |
382 | ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), | |
383 | &passwords); | |
23bbb0de MS |
384 | if (r < 0) |
385 | return log_error_errno(r, "Failed to query password: %m"); | |
e7d90b71 | 386 | |
f75cac37 | 387 | if (arg_verify) { |
ab84f5b9 ZJS |
388 | _cleanup_strv_free_erase_ char **passwords2 = NULL; |
389 | ||
1602b008 | 390 | assert(strv_length(passwords) == 1); |
e7d90b71 | 391 | |
ab84f5b9 ZJS |
392 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) |
393 | return log_oom(); | |
e7d90b71 | 394 | |
63c372cb | 395 | id = strjoina("cryptsetup-verification:", escaped_name); |
9fa1de96 | 396 | |
e287086b | 397 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
ab84f5b9 ZJS |
398 | if (r < 0) |
399 | return log_error_errno(r, "Failed to query verification password: %m"); | |
e7d90b71 JJ |
400 | |
401 | assert(strv_length(passwords2) == 1); | |
402 | ||
1602b008 | 403 | if (!streq(passwords[0], passwords2[0])) { |
e7d90b71 | 404 | log_warning("Passwords did not match, retrying."); |
ab84f5b9 | 405 | return -EAGAIN; |
e7d90b71 JJ |
406 | } |
407 | } | |
408 | ||
1602b008 | 409 | strv_uniq(passwords); |
e7d90b71 | 410 | |
1602b008 | 411 | STRV_FOREACH(p, passwords) { |
e7d90b71 JJ |
412 | char *c; |
413 | ||
f75cac37 | 414 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
415 | continue; |
416 | ||
417 | /* Pad password if necessary */ | |
1602b008 | 418 | c = new(char, arg_key_size); |
ab84f5b9 ZJS |
419 | if (!c) |
420 | return log_oom(); | |
e7d90b71 | 421 | |
f75cac37 | 422 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
423 | free(*p); |
424 | *p = c; | |
425 | } | |
426 | ||
1602b008 LP |
427 | *ret = passwords; |
428 | passwords = NULL; | |
429 | ||
ab84f5b9 | 430 | return 0; |
e7d90b71 JJ |
431 | } |
432 | ||
1602b008 LP |
433 | static int attach_tcrypt( |
434 | struct crypt_device *cd, | |
435 | const char *name, | |
436 | const char *key_file, | |
437 | char **passwords, | |
438 | uint32_t flags) { | |
439 | ||
8cf3ca80 JJ |
440 | int r = 0; |
441 | _cleanup_free_ char *passphrase = NULL; | |
442 | struct crypt_params_tcrypt params = { | |
443 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
444 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
445 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
446 | }; |
447 | ||
448 | assert(cd); | |
449 | assert(name); | |
f268f57f | 450 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 451 | |
f75cac37 | 452 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
453 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
454 | ||
f75cac37 | 455 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
456 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
457 | ||
52028838 GH |
458 | #ifdef CRYPT_TCRYPT_VERA_MODES |
459 | if (arg_tcrypt_veracrypt) | |
460 | params.flags |= CRYPT_TCRYPT_VERA_MODES; | |
461 | #endif | |
462 | ||
8cf3ca80 JJ |
463 | if (key_file) { |
464 | r = read_one_line_file(key_file, &passphrase); | |
465 | if (r < 0) { | |
da927ba9 | 466 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
467 | return -EAGAIN; |
468 | } | |
469 | ||
470 | params.passphrase = passphrase; | |
471 | } else | |
472 | params.passphrase = passwords[0]; | |
473 | params.passphrase_size = strlen(params.passphrase); | |
474 | ||
475 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
476 | if (r < 0) { | |
477 | if (key_file && r == -EPERM) { | |
478 | log_error("Failed to activate using password file '%s'.", key_file); | |
479 | return -EAGAIN; | |
480 | } | |
481 | return r; | |
482 | } | |
483 | ||
ac1a87b9 | 484 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
485 | } |
486 | ||
10fb4e35 JJ |
487 | static int attach_luks_or_plain(struct crypt_device *cd, |
488 | const char *name, | |
489 | const char *key_file, | |
7376e835 | 490 | const char *data_device, |
10fb4e35 JJ |
491 | char **passwords, |
492 | uint32_t flags) { | |
493 | int r = 0; | |
494 | bool pass_volume_key = false; | |
495 | ||
496 | assert(cd); | |
497 | assert(name); | |
498 | assert(key_file || passwords); | |
499 | ||
b3b4ebab OK |
500 | if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) { |
501 | r = crypt_load(cd, CRYPT_LUKS, NULL); | |
7376e835 AC |
502 | if (r < 0) { |
503 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
504 | return r; | |
505 | } | |
506 | ||
507 | if (data_device) | |
508 | r = crypt_set_data_device(cd, data_device); | |
509 | } | |
10fb4e35 | 510 | |
f75cac37 | 511 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
512 | struct crypt_params_plain params = { |
513 | .offset = arg_offset, | |
514 | .skip = arg_skip, | |
515 | }; | |
10fb4e35 JJ |
516 | const char *cipher, *cipher_mode; |
517 | _cleanup_free_ char *truncated_cipher = NULL; | |
518 | ||
f75cac37 | 519 | if (arg_hash) { |
10fb4e35 | 520 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
521 | if (!streq(arg_hash, "plain")) |
522 | params.hash = arg_hash; | |
8a52210c ZJS |
523 | } else if (!key_file) |
524 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
525 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
526 | params.hash = "ripemd160"; |
527 | ||
f75cac37 | 528 | if (arg_cipher) { |
10fb4e35 JJ |
529 | size_t l; |
530 | ||
f75cac37 LP |
531 | l = strcspn(arg_cipher, "-"); |
532 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
533 | if (!truncated_cipher) |
534 | return log_oom(); | |
535 | ||
536 | cipher = truncated_cipher; | |
f75cac37 | 537 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
538 | } else { |
539 | cipher = "aes"; | |
540 | cipher_mode = "cbc-essiv:sha256"; | |
541 | } | |
542 | ||
543 | /* for CRYPT_PLAIN limit reads | |
544 | * from keyfile to key length, and | |
545 | * ignore keyfile-size */ | |
6131a78b | 546 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
547 | |
548 | /* In contrast to what the name | |
549 | * crypt_setup() might suggest this | |
550 | * doesn't actually format anything, | |
551 | * it just configures encryption | |
552 | * parameters when used for plain | |
553 | * mode. */ | |
1602b008 | 554 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
555 | |
556 | /* hash == NULL implies the user passed "plain" */ | |
557 | pass_volume_key = (params.hash == NULL); | |
558 | } | |
559 | ||
23bbb0de MS |
560 | if (r < 0) |
561 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
562 | |
563 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
564 | crypt_get_cipher(cd), | |
565 | crypt_get_cipher_mode(cd), | |
566 | crypt_get_volume_key_size(cd)*8, | |
567 | crypt_get_device_name(cd)); | |
568 | ||
569 | if (key_file) { | |
1602b008 | 570 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); |
10fb4e35 | 571 | if (r < 0) { |
da927ba9 | 572 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
573 | return -EAGAIN; |
574 | } | |
575 | } else { | |
576 | char **p; | |
577 | ||
578 | STRV_FOREACH(p, passwords) { | |
579 | if (pass_volume_key) | |
f75cac37 | 580 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 581 | else |
f75cac37 | 582 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
583 | |
584 | if (r >= 0) | |
585 | break; | |
586 | } | |
587 | } | |
588 | ||
589 | return r; | |
590 | } | |
591 | ||
dd5e696d LP |
592 | static int help(void) { |
593 | ||
594 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
595 | "%s detach VOLUME\n\n" | |
596 | "Attaches or detaches an encrypted block device.\n", | |
597 | program_invocation_short_name, | |
598 | program_invocation_short_name); | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
e23a0ce8 | 603 | int main(int argc, char *argv[]) { |
294bd454 | 604 | _cleanup_(crypt_freep) struct crypt_device *cd = NULL; |
81a6ac6c | 605 | int r = -EINVAL; |
e23a0ce8 | 606 | |
dd5e696d | 607 | if (argc <= 1) { |
5f4bfe56 LP |
608 | r = help(); |
609 | goto finish; | |
dd5e696d LP |
610 | } |
611 | ||
e23a0ce8 LP |
612 | if (argc < 3) { |
613 | log_error("This program requires at least two arguments."); | |
5f4bfe56 | 614 | goto finish; |
e23a0ce8 LP |
615 | } |
616 | ||
bb7df0da | 617 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
618 | log_parse_environment(); |
619 | log_open(); | |
620 | ||
4c12626c LP |
621 | umask(0022); |
622 | ||
260ab287 | 623 | if (streq(argv[1], "attach")) { |
7f4e0805 | 624 | uint32_t flags = 0; |
10fb4e35 | 625 | unsigned tries; |
260ab287 | 626 | usec_t until; |
e2d480b9 | 627 | crypt_status_info status; |
e51b9486 | 628 | const char *key_file = NULL; |
7f4e0805 | 629 | |
b61e476f LP |
630 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
631 | ||
7f4e0805 LP |
632 | if (argc < 4) { |
633 | log_error("attach requires at least two arguments."); | |
634 | goto finish; | |
635 | } | |
636 | ||
1fc76335 LP |
637 | if (argc >= 5 && |
638 | argv[4][0] && | |
639 | !streq(argv[4], "-") && | |
640 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
641 | |
642 | if (!path_is_absolute(argv[4])) | |
8cf3ca80 | 643 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
644 | else |
645 | key_file = argv[4]; | |
646 | } | |
647 | ||
74b1c371 LP |
648 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
649 | if (parse_options(argv[5]) < 0) | |
650 | goto finish; | |
651 | } | |
e23a0ce8 | 652 | |
b853f6e9 LP |
653 | /* A delicious drop of snake oil */ |
654 | mlockall(MCL_FUTURE); | |
655 | ||
7376e835 AC |
656 | if (arg_header) { |
657 | log_debug("LUKS header: %s", arg_header); | |
5f4bfe56 | 658 | r = crypt_init(&cd, arg_header); |
7376e835 | 659 | } else |
5f4bfe56 LP |
660 | r = crypt_init(&cd, argv[3]); |
661 | if (r < 0) { | |
662 | log_error_errno(r, "crypt_init() failed: %m"); | |
7f4e0805 LP |
663 | goto finish; |
664 | } | |
e23a0ce8 | 665 | |
691c2e2e | 666 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 667 | |
260ab287 | 668 | status = crypt_status(cd, argv[2]); |
3742095b | 669 | if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) { |
260ab287 | 670 | log_info("Volume %s already active.", argv[2]); |
5f4bfe56 | 671 | r = 0; |
7f4e0805 LP |
672 | goto finish; |
673 | } | |
674 | ||
f75cac37 | 675 | if (arg_readonly) |
7f4e0805 LP |
676 | flags |= CRYPT_ACTIVATE_READONLY; |
677 | ||
f75cac37 | 678 | if (arg_discards) |
2a2aab60 MM |
679 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
680 | ||
0864d311 | 681 | if (arg_timeout == USEC_INFINITY) |
7dcda352 | 682 | until = 0; |
0864d311 AS |
683 | else |
684 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
260ab287 | 685 | |
6131a78b | 686 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 687 | |
10fb4e35 JJ |
688 | if (key_file) { |
689 | struct stat st; | |
e2d480b9 | 690 | |
10fb4e35 JJ |
691 | /* Ideally we'd do this on the open fd, but since this is just a |
692 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
693 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
694 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
695 | } |
696 | ||
f75cac37 | 697 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
ab84f5b9 | 698 | _cleanup_strv_free_erase_ char **passwords = NULL; |
260ab287 LP |
699 | |
700 | if (!key_file) { | |
5f4bfe56 LP |
701 | r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
702 | if (r == -EAGAIN) | |
e7d90b71 | 703 | continue; |
5f4bfe56 | 704 | if (r < 0) |
260ab287 | 705 | goto finish; |
260ab287 LP |
706 | } |
707 | ||
f75cac37 | 708 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
5f4bfe56 | 709 | r = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
8cf3ca80 | 710 | else |
5f4bfe56 | 711 | r = attach_luks_or_plain(cd, |
7376e835 AC |
712 | argv[2], |
713 | key_file, | |
714 | arg_header ? argv[3] : NULL, | |
715 | passwords, | |
716 | flags); | |
5f4bfe56 | 717 | if (r >= 0) |
260ab287 | 718 | break; |
5f4bfe56 | 719 | if (r == -EAGAIN) { |
10fb4e35 JJ |
720 | key_file = NULL; |
721 | continue; | |
5f4bfe56 LP |
722 | } |
723 | if (r != -EPERM) { | |
724 | log_error_errno(r, "Failed to activate: %m"); | |
260ab287 LP |
725 | goto finish; |
726 | } | |
727 | ||
728 | log_warning("Invalid passphrase."); | |
7f4e0805 LP |
729 | } |
730 | ||
f75cac37 | 731 | if (arg_tries != 0 && tries >= arg_tries) { |
10fb4e35 | 732 | log_error("Too many attempts; giving up."); |
5f4bfe56 | 733 | r = -EPERM; |
bd40a2d8 | 734 | goto finish; |
7f4e0805 LP |
735 | } |
736 | ||
737 | } else if (streq(argv[1], "detach")) { | |
7f4e0805 | 738 | |
5f4bfe56 LP |
739 | r = crypt_init_by_name(&cd, argv[2]); |
740 | if (r == -ENODEV) { | |
a0bfc9c2 | 741 | log_info("Volume %s already inactive.", argv[2]); |
5f4bfe56 | 742 | r = 0; |
a0bfc9c2 | 743 | goto finish; |
5f4bfe56 LP |
744 | } |
745 | if (r < 0) { | |
746 | log_error_errno(r, "crypt_init_by_name() failed: %m"); | |
7f4e0805 LP |
747 | goto finish; |
748 | } | |
749 | ||
691c2e2e | 750 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 751 | |
5f4bfe56 LP |
752 | r = crypt_deactivate(cd, argv[2]); |
753 | if (r < 0) { | |
754 | log_error_errno(r, "Failed to deactivate: %m"); | |
7f4e0805 LP |
755 | goto finish; |
756 | } | |
e23a0ce8 LP |
757 | |
758 | } else { | |
759 | log_error("Unknown verb %s.", argv[1]); | |
760 | goto finish; | |
761 | } | |
762 | ||
5f4bfe56 | 763 | r = 0; |
7f4e0805 | 764 | |
e23a0ce8 | 765 | finish: |
f75cac37 LP |
766 | free(arg_cipher); |
767 | free(arg_hash); | |
7376e835 | 768 | free(arg_header); |
f75cac37 | 769 | strv_free(arg_tcrypt_keyfiles); |
260ab287 | 770 | |
5f4bfe56 | 771 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
e23a0ce8 | 772 | } |