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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 LP |
30 | #include "ask-password-api.h" |
31 | #include "device-util.h" | |
32 | #include "escape.h" | |
8cf3ca80 | 33 | #include "fileio.h" |
e23a0ce8 | 34 | #include "log.h" |
4349cd7c | 35 | #include "mount-util.h" |
6bedfcbb | 36 | #include "parse-util.h" |
9eb977db | 37 | #include "path-util.h" |
07630cea | 38 | #include "string-util.h" |
21bc923a | 39 | #include "strv.h" |
4f5dd394 | 40 | #include "util.h" |
7f4e0805 | 41 | |
b3b4ebab OK |
42 | /* libcryptsetup define for any LUKS version, compatible with libcryptsetup 1.x */ |
43 | #ifndef CRYPT_LUKS | |
44 | #define CRYPT_LUKS NULL | |
45 | #endif | |
46 | ||
47 | /* internal helper */ | |
48 | #define ANY_LUKS "LUKS" | |
49 | ||
50 | static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */ | |
f75cac37 LP |
51 | static char *arg_cipher = NULL; |
52 | static unsigned arg_key_size = 0; | |
53 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
54 | static unsigned arg_keyfile_size = 0; | |
55 | static unsigned arg_keyfile_offset = 0; | |
56 | static char *arg_hash = NULL; | |
7376e835 | 57 | static char *arg_header = NULL; |
f75cac37 LP |
58 | static unsigned arg_tries = 3; |
59 | static bool arg_readonly = false; | |
60 | static bool arg_verify = false; | |
61 | static bool arg_discards = false; | |
62 | static bool arg_tcrypt_hidden = false; | |
63 | static bool arg_tcrypt_system = false; | |
2e914ef4 | 64 | #ifdef CRYPT_TCRYPT_VERA_MODES |
52028838 | 65 | static bool arg_tcrypt_veracrypt = false; |
2e914ef4 | 66 | #endif |
f75cac37 | 67 | static char **arg_tcrypt_keyfiles = NULL; |
4eac2773 MP |
68 | static uint64_t arg_offset = 0; |
69 | static uint64_t arg_skip = 0; | |
0864d311 | 70 | static usec_t arg_timeout = USEC_INFINITY; |
7f4e0805 | 71 | |
1fc76335 LP |
72 | /* Options Debian's crypttab knows we don't: |
73 | ||
1fc76335 LP |
74 | precheck= |
75 | check= | |
76 | checkargs= | |
77 | noearly= | |
78 | loud= | |
79 | keyscript= | |
80 | */ | |
81 | ||
7f4e0805 | 82 | static int parse_one_option(const char *option) { |
fb4650aa ZJS |
83 | const char *val; |
84 | int r; | |
85 | ||
7f4e0805 LP |
86 | assert(option); |
87 | ||
88 | /* Handled outside of this tool */ | |
f7576eb9 | 89 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev")) |
7f4e0805 LP |
90 | return 0; |
91 | ||
fb4650aa ZJS |
92 | if ((val = startswith(option, "cipher="))) { |
93 | r = free_and_strdup(&arg_cipher, val); | |
94 | if (r < 0) | |
4b93637f | 95 | return log_oom(); |
7f4e0805 | 96 | |
fb4650aa | 97 | } else if ((val = startswith(option, "size="))) { |
7f4e0805 | 98 | |
fb4650aa ZJS |
99 | r = safe_atou(val, &arg_key_size); |
100 | if (r < 0) { | |
101 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
102 | return 0; |
103 | } | |
104 | ||
6131a78b DH |
105 | if (arg_key_size % 8) { |
106 | log_error("size= not a multiple of 8, ignoring."); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | arg_key_size /= 8; | |
111 | ||
fb4650aa | 112 | } else if ((val = startswith(option, "key-slot="))) { |
b4a11878 | 113 | |
b3b4ebab | 114 | arg_type = ANY_LUKS; |
fb4650aa ZJS |
115 | r = safe_atoi(val, &arg_key_slot); |
116 | if (r < 0) { | |
117 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
b4a11878 CS |
118 | return 0; |
119 | } | |
120 | ||
fb4650aa | 121 | } else if ((val = startswith(option, "tcrypt-keyfile="))) { |
8cf3ca80 | 122 | |
f75cac37 | 123 | arg_type = CRYPT_TCRYPT; |
fb4650aa ZJS |
124 | if (path_is_absolute(val)) { |
125 | if (strv_extend(&arg_tcrypt_keyfiles, val) < 0) | |
4b93637f LP |
126 | return log_oom(); |
127 | } else | |
fb4650aa | 128 | log_error("Key file path \"%s\" is not absolute. Ignoring.", val); |
8cf3ca80 | 129 | |
fb4650aa | 130 | } else if ((val = startswith(option, "keyfile-size="))) { |
4271d823 | 131 | |
fb4650aa ZJS |
132 | r = safe_atou(val, &arg_keyfile_size); |
133 | if (r < 0) { | |
134 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
4271d823 TG |
135 | return 0; |
136 | } | |
137 | ||
fb4650aa | 138 | } else if ((val = startswith(option, "keyfile-offset="))) { |
880a599e | 139 | |
fb4650aa ZJS |
140 | r = safe_atou(val, &arg_keyfile_offset); |
141 | if (r < 0) { | |
142 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
880a599e TG |
143 | return 0; |
144 | } | |
145 | ||
fb4650aa ZJS |
146 | } else if ((val = startswith(option, "hash="))) { |
147 | r = free_and_strdup(&arg_hash, val); | |
148 | if (r < 0) | |
4b93637f | 149 | return log_oom(); |
7f4e0805 | 150 | |
fb4650aa | 151 | } else if ((val = startswith(option, "header="))) { |
b3b4ebab | 152 | arg_type = ANY_LUKS; |
7376e835 | 153 | |
fb4650aa ZJS |
154 | if (!path_is_absolute(val)) { |
155 | log_error("Header path \"%s\" is not absolute, refusing.", val); | |
7376e835 AC |
156 | return -EINVAL; |
157 | } | |
158 | ||
159 | if (arg_header) { | |
fb4650aa | 160 | log_error("Duplicate header= option, refusing."); |
7376e835 AC |
161 | return -EINVAL; |
162 | } | |
163 | ||
fb4650aa | 164 | arg_header = strdup(val); |
7376e835 AC |
165 | if (!arg_header) |
166 | return log_oom(); | |
167 | ||
fb4650aa | 168 | } else if ((val = startswith(option, "tries="))) { |
7f4e0805 | 169 | |
fb4650aa ZJS |
170 | r = safe_atou(val, &arg_tries); |
171 | if (r < 0) { | |
172 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
173 | return 0; |
174 | } | |
175 | ||
f75cac37 LP |
176 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
177 | arg_readonly = true; | |
7f4e0805 | 178 | else if (streq(option, "verify")) |
f75cac37 LP |
179 | arg_verify = true; |
180 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
181 | arg_discards = true; | |
260ab287 | 182 | else if (streq(option, "luks")) |
b3b4ebab | 183 | arg_type = ANY_LUKS; |
8cf3ca80 | 184 | else if (streq(option, "tcrypt")) |
f75cac37 | 185 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 186 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
187 | arg_type = CRYPT_TCRYPT; |
188 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 189 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
190 | arg_type = CRYPT_TCRYPT; |
191 | arg_tcrypt_system = true; | |
52028838 GH |
192 | } else if (streq(option, "tcrypt-veracrypt")) { |
193 | #ifdef CRYPT_TCRYPT_VERA_MODES | |
194 | arg_type = CRYPT_TCRYPT; | |
195 | arg_tcrypt_veracrypt = true; | |
196 | #else | |
197 | log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing."); | |
198 | return -EINVAL; | |
199 | #endif | |
f75cac37 LP |
200 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) |
201 | arg_type = CRYPT_PLAIN; | |
fb4650aa | 202 | else if ((val = startswith(option, "timeout="))) { |
7f4e0805 | 203 | |
0004f698 | 204 | r = parse_sec_fix_0(val, &arg_timeout); |
fb4650aa ZJS |
205 | if (r < 0) { |
206 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
207 | return 0; |
208 | } | |
209 | ||
fb4650aa | 210 | } else if ((val = startswith(option, "offset="))) { |
4eac2773 | 211 | |
fb4650aa ZJS |
212 | r = safe_atou64(val, &arg_offset); |
213 | if (r < 0) | |
214 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 215 | |
fb4650aa | 216 | } else if ((val = startswith(option, "skip="))) { |
4eac2773 | 217 | |
fb4650aa ZJS |
218 | r = safe_atou64(val, &arg_skip); |
219 | if (r < 0) | |
220 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 221 | |
41e6f28a | 222 | } else if (!streq(option, "none")) |
fb4650aa | 223 | log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
7f4e0805 LP |
224 | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static int parse_options(const char *options) { | |
a2a5291b | 229 | const char *word, *state; |
7f4e0805 | 230 | size_t l; |
74b1c371 | 231 | int r; |
7f4e0805 LP |
232 | |
233 | assert(options); | |
234 | ||
a2a5291b | 235 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 236 | _cleanup_free_ char *o; |
7f4e0805 | 237 | |
a2a5291b | 238 | o = strndup(word, l); |
74b1c371 | 239 | if (!o) |
7f4e0805 | 240 | return -ENOMEM; |
7f4e0805 | 241 | r = parse_one_option(o); |
7f4e0805 LP |
242 | if (r < 0) |
243 | return r; | |
244 | } | |
245 | ||
4eac2773 MP |
246 | /* sanity-check options */ |
247 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
248 | if (arg_offset) | |
249 | log_warning("offset= ignored with type %s", arg_type); | |
250 | if (arg_skip) | |
251 | log_warning("skip= ignored with type %s", arg_type); | |
252 | } | |
253 | ||
7f4e0805 LP |
254 | return 0; |
255 | } | |
256 | ||
257 | static void log_glue(int level, const char *msg, void *usrptr) { | |
260ab287 | 258 | log_debug("%s", msg); |
7f4e0805 | 259 | } |
e23a0ce8 | 260 | |
e51b9486 HH |
261 | static int disk_major_minor(const char *path, char **ret) { |
262 | struct stat st; | |
263 | ||
264 | assert(path); | |
265 | ||
266 | if (stat(path, &st) < 0) | |
267 | return -errno; | |
268 | ||
269 | if (!S_ISBLK(st.st_mode)) | |
270 | return -EINVAL; | |
271 | ||
272 | if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
273 | return -errno; | |
274 | ||
275 | return 0; | |
276 | } | |
277 | ||
1ca208fb | 278 | static char* disk_description(const char *path) { |
74b1c371 | 279 | |
f75cac37 | 280 | static const char name_fields[] = |
74b1c371 LP |
281 | "ID_PART_ENTRY_NAME\0" |
282 | "DM_NAME\0" | |
283 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 284 | "ID_MODEL\0"; |
74b1c371 | 285 | |
4afd3348 | 286 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
b1a2da0a | 287 | struct stat st; |
74b1c371 | 288 | const char *i; |
9a97aaae | 289 | int r; |
b1a2da0a LP |
290 | |
291 | assert(path); | |
292 | ||
293 | if (stat(path, &st) < 0) | |
294 | return NULL; | |
295 | ||
296 | if (!S_ISBLK(st.st_mode)) | |
297 | return NULL; | |
298 | ||
9a97aaae TG |
299 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
300 | if (r < 0) | |
1ca208fb | 301 | return NULL; |
b1a2da0a | 302 | |
74b1c371 LP |
303 | NULSTR_FOREACH(i, name_fields) { |
304 | const char *name; | |
305 | ||
9a97aaae TG |
306 | r = sd_device_get_property_value(device, i, &name); |
307 | if (r >= 0 && !isempty(name)) | |
1ca208fb | 308 | return strdup(name); |
74b1c371 | 309 | } |
b1a2da0a | 310 | |
1ca208fb | 311 | return NULL; |
b1a2da0a LP |
312 | } |
313 | ||
b61e476f | 314 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 315 | _cleanup_free_ char *device = NULL; |
5862d652 | 316 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
317 | struct mntent *m; |
318 | ||
319 | /* Yeah, we don't support native systemd unit files here for now */ | |
320 | ||
321 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 322 | return NULL; |
b61e476f | 323 | |
9ffcff0e | 324 | f = setmntent("/etc/fstab", "re"); |
e0295d26 | 325 | if (!f) |
5862d652 | 326 | return NULL; |
b61e476f LP |
327 | |
328 | while ((m = getmntent(f))) | |
5862d652 ZJS |
329 | if (path_equal(m->mnt_fsname, device)) |
330 | return strdup(m->mnt_dir); | |
b61e476f | 331 | |
5862d652 | 332 | return NULL; |
b61e476f LP |
333 | } |
334 | ||
1602b008 | 335 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { |
e287086b | 336 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL; |
ab84f5b9 | 337 | _cleanup_strv_free_erase_ char **passwords = NULL; |
e51b9486 | 338 | const char *name = NULL; |
e287086b LP |
339 | char **p, *id; |
340 | int r = 0; | |
e7d90b71 | 341 | |
e51b9486 HH |
342 | assert(vol); |
343 | assert(src); | |
1602b008 | 344 | assert(ret); |
e7d90b71 | 345 | |
e51b9486 HH |
346 | description = disk_description(src); |
347 | mount_point = disk_mount_point(vol); | |
348 | ||
ece174c5 | 349 | if (description && streq(vol, description)) |
e51b9486 HH |
350 | /* If the description string is simply the |
351 | * volume name, then let's not show this | |
352 | * twice */ | |
97b11eed | 353 | description = mfree(description); |
e51b9486 HH |
354 | |
355 | if (mount_point && description) | |
356 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
357 | else if (mount_point) | |
358 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
359 | else if (description) | |
360 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
361 | ||
362 | if (r < 0) | |
363 | return log_oom(); | |
364 | ||
365 | name = name_buffer ? name_buffer : vol; | |
366 | ||
e7d90b71 JJ |
367 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
368 | return log_oom(); | |
369 | ||
e51b9486 HH |
370 | if (src) |
371 | (void) disk_major_minor(src, &maj_min); | |
372 | ||
373 | if (maj_min) { | |
374 | escaped_name = maj_min; | |
375 | maj_min = NULL; | |
376 | } else | |
377 | escaped_name = cescape(name); | |
378 | ||
9fa1de96 DH |
379 | if (!escaped_name) |
380 | return log_oom(); | |
381 | ||
63c372cb | 382 | id = strjoina("cryptsetup:", escaped_name); |
9fa1de96 | 383 | |
ab84f5b9 ZJS |
384 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, |
385 | ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), | |
386 | &passwords); | |
23bbb0de MS |
387 | if (r < 0) |
388 | return log_error_errno(r, "Failed to query password: %m"); | |
e7d90b71 | 389 | |
f75cac37 | 390 | if (arg_verify) { |
ab84f5b9 ZJS |
391 | _cleanup_strv_free_erase_ char **passwords2 = NULL; |
392 | ||
1602b008 | 393 | assert(strv_length(passwords) == 1); |
e7d90b71 | 394 | |
ab84f5b9 ZJS |
395 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) |
396 | return log_oom(); | |
e7d90b71 | 397 | |
63c372cb | 398 | id = strjoina("cryptsetup-verification:", escaped_name); |
9fa1de96 | 399 | |
e287086b | 400 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
ab84f5b9 ZJS |
401 | if (r < 0) |
402 | return log_error_errno(r, "Failed to query verification password: %m"); | |
e7d90b71 JJ |
403 | |
404 | assert(strv_length(passwords2) == 1); | |
405 | ||
1602b008 | 406 | if (!streq(passwords[0], passwords2[0])) { |
e7d90b71 | 407 | log_warning("Passwords did not match, retrying."); |
ab84f5b9 | 408 | return -EAGAIN; |
e7d90b71 JJ |
409 | } |
410 | } | |
411 | ||
1602b008 | 412 | strv_uniq(passwords); |
e7d90b71 | 413 | |
1602b008 | 414 | STRV_FOREACH(p, passwords) { |
e7d90b71 JJ |
415 | char *c; |
416 | ||
f75cac37 | 417 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
418 | continue; |
419 | ||
420 | /* Pad password if necessary */ | |
1602b008 | 421 | c = new(char, arg_key_size); |
ab84f5b9 ZJS |
422 | if (!c) |
423 | return log_oom(); | |
e7d90b71 | 424 | |
f75cac37 | 425 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
426 | free(*p); |
427 | *p = c; | |
428 | } | |
429 | ||
1602b008 LP |
430 | *ret = passwords; |
431 | passwords = NULL; | |
432 | ||
ab84f5b9 | 433 | return 0; |
e7d90b71 JJ |
434 | } |
435 | ||
1602b008 LP |
436 | static int attach_tcrypt( |
437 | struct crypt_device *cd, | |
438 | const char *name, | |
439 | const char *key_file, | |
440 | char **passwords, | |
441 | uint32_t flags) { | |
442 | ||
8cf3ca80 JJ |
443 | int r = 0; |
444 | _cleanup_free_ char *passphrase = NULL; | |
445 | struct crypt_params_tcrypt params = { | |
446 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
447 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
448 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
449 | }; |
450 | ||
451 | assert(cd); | |
452 | assert(name); | |
f268f57f | 453 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 454 | |
f75cac37 | 455 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
456 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
457 | ||
f75cac37 | 458 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
459 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
460 | ||
52028838 GH |
461 | #ifdef CRYPT_TCRYPT_VERA_MODES |
462 | if (arg_tcrypt_veracrypt) | |
463 | params.flags |= CRYPT_TCRYPT_VERA_MODES; | |
464 | #endif | |
465 | ||
8cf3ca80 JJ |
466 | if (key_file) { |
467 | r = read_one_line_file(key_file, &passphrase); | |
468 | if (r < 0) { | |
da927ba9 | 469 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
470 | return -EAGAIN; |
471 | } | |
472 | ||
473 | params.passphrase = passphrase; | |
474 | } else | |
475 | params.passphrase = passwords[0]; | |
476 | params.passphrase_size = strlen(params.passphrase); | |
477 | ||
478 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
479 | if (r < 0) { | |
480 | if (key_file && r == -EPERM) { | |
481 | log_error("Failed to activate using password file '%s'.", key_file); | |
482 | return -EAGAIN; | |
483 | } | |
484 | return r; | |
485 | } | |
486 | ||
ac1a87b9 | 487 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
488 | } |
489 | ||
10fb4e35 JJ |
490 | static int attach_luks_or_plain(struct crypt_device *cd, |
491 | const char *name, | |
492 | const char *key_file, | |
7376e835 | 493 | const char *data_device, |
10fb4e35 JJ |
494 | char **passwords, |
495 | uint32_t flags) { | |
496 | int r = 0; | |
497 | bool pass_volume_key = false; | |
498 | ||
499 | assert(cd); | |
500 | assert(name); | |
501 | assert(key_file || passwords); | |
502 | ||
b3b4ebab OK |
503 | if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) { |
504 | r = crypt_load(cd, CRYPT_LUKS, NULL); | |
7376e835 AC |
505 | if (r < 0) { |
506 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
507 | return r; | |
508 | } | |
509 | ||
510 | if (data_device) | |
511 | r = crypt_set_data_device(cd, data_device); | |
512 | } | |
10fb4e35 | 513 | |
f75cac37 | 514 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
515 | struct crypt_params_plain params = { |
516 | .offset = arg_offset, | |
517 | .skip = arg_skip, | |
518 | }; | |
10fb4e35 JJ |
519 | const char *cipher, *cipher_mode; |
520 | _cleanup_free_ char *truncated_cipher = NULL; | |
521 | ||
f75cac37 | 522 | if (arg_hash) { |
10fb4e35 | 523 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
524 | if (!streq(arg_hash, "plain")) |
525 | params.hash = arg_hash; | |
8a52210c ZJS |
526 | } else if (!key_file) |
527 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
528 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
529 | params.hash = "ripemd160"; |
530 | ||
f75cac37 | 531 | if (arg_cipher) { |
10fb4e35 JJ |
532 | size_t l; |
533 | ||
f75cac37 LP |
534 | l = strcspn(arg_cipher, "-"); |
535 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
536 | if (!truncated_cipher) |
537 | return log_oom(); | |
538 | ||
539 | cipher = truncated_cipher; | |
f75cac37 | 540 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
541 | } else { |
542 | cipher = "aes"; | |
543 | cipher_mode = "cbc-essiv:sha256"; | |
544 | } | |
545 | ||
546 | /* for CRYPT_PLAIN limit reads | |
547 | * from keyfile to key length, and | |
548 | * ignore keyfile-size */ | |
6131a78b | 549 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
550 | |
551 | /* In contrast to what the name | |
552 | * crypt_setup() might suggest this | |
553 | * doesn't actually format anything, | |
554 | * it just configures encryption | |
555 | * parameters when used for plain | |
556 | * mode. */ | |
1602b008 | 557 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
558 | |
559 | /* hash == NULL implies the user passed "plain" */ | |
560 | pass_volume_key = (params.hash == NULL); | |
561 | } | |
562 | ||
23bbb0de MS |
563 | if (r < 0) |
564 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
565 | |
566 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
567 | crypt_get_cipher(cd), | |
568 | crypt_get_cipher_mode(cd), | |
569 | crypt_get_volume_key_size(cd)*8, | |
570 | crypt_get_device_name(cd)); | |
571 | ||
572 | if (key_file) { | |
1602b008 | 573 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); |
10fb4e35 | 574 | if (r < 0) { |
da927ba9 | 575 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
576 | return -EAGAIN; |
577 | } | |
578 | } else { | |
579 | char **p; | |
580 | ||
581 | STRV_FOREACH(p, passwords) { | |
582 | if (pass_volume_key) | |
f75cac37 | 583 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 584 | else |
f75cac37 | 585 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
586 | |
587 | if (r >= 0) | |
588 | break; | |
589 | } | |
590 | } | |
591 | ||
592 | return r; | |
593 | } | |
594 | ||
dd5e696d LP |
595 | static int help(void) { |
596 | ||
597 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
598 | "%s detach VOLUME\n\n" | |
599 | "Attaches or detaches an encrypted block device.\n", | |
600 | program_invocation_short_name, | |
601 | program_invocation_short_name); | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
e23a0ce8 | 606 | int main(int argc, char *argv[]) { |
7f4e0805 | 607 | struct crypt_device *cd = NULL; |
81a6ac6c | 608 | int r = -EINVAL; |
e23a0ce8 | 609 | |
dd5e696d | 610 | if (argc <= 1) { |
5f4bfe56 LP |
611 | r = help(); |
612 | goto finish; | |
dd5e696d LP |
613 | } |
614 | ||
e23a0ce8 LP |
615 | if (argc < 3) { |
616 | log_error("This program requires at least two arguments."); | |
5f4bfe56 | 617 | goto finish; |
e23a0ce8 LP |
618 | } |
619 | ||
bb7df0da | 620 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
621 | log_parse_environment(); |
622 | log_open(); | |
623 | ||
4c12626c LP |
624 | umask(0022); |
625 | ||
260ab287 | 626 | if (streq(argv[1], "attach")) { |
7f4e0805 | 627 | uint32_t flags = 0; |
10fb4e35 | 628 | unsigned tries; |
260ab287 | 629 | usec_t until; |
e2d480b9 | 630 | crypt_status_info status; |
e51b9486 | 631 | const char *key_file = NULL; |
7f4e0805 | 632 | |
b61e476f LP |
633 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
634 | ||
7f4e0805 LP |
635 | if (argc < 4) { |
636 | log_error("attach requires at least two arguments."); | |
637 | goto finish; | |
638 | } | |
639 | ||
1fc76335 LP |
640 | if (argc >= 5 && |
641 | argv[4][0] && | |
642 | !streq(argv[4], "-") && | |
643 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
644 | |
645 | if (!path_is_absolute(argv[4])) | |
8cf3ca80 | 646 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
647 | else |
648 | key_file = argv[4]; | |
649 | } | |
650 | ||
74b1c371 LP |
651 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
652 | if (parse_options(argv[5]) < 0) | |
653 | goto finish; | |
654 | } | |
e23a0ce8 | 655 | |
b853f6e9 LP |
656 | /* A delicious drop of snake oil */ |
657 | mlockall(MCL_FUTURE); | |
658 | ||
7376e835 AC |
659 | if (arg_header) { |
660 | log_debug("LUKS header: %s", arg_header); | |
5f4bfe56 | 661 | r = crypt_init(&cd, arg_header); |
7376e835 | 662 | } else |
5f4bfe56 LP |
663 | r = crypt_init(&cd, argv[3]); |
664 | if (r < 0) { | |
665 | log_error_errno(r, "crypt_init() failed: %m"); | |
7f4e0805 LP |
666 | goto finish; |
667 | } | |
e23a0ce8 | 668 | |
7f4e0805 | 669 | crypt_set_log_callback(cd, log_glue, NULL); |
7f4e0805 | 670 | |
260ab287 | 671 | status = crypt_status(cd, argv[2]); |
3742095b | 672 | if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) { |
260ab287 | 673 | log_info("Volume %s already active.", argv[2]); |
5f4bfe56 | 674 | r = 0; |
7f4e0805 LP |
675 | goto finish; |
676 | } | |
677 | ||
f75cac37 | 678 | if (arg_readonly) |
7f4e0805 LP |
679 | flags |= CRYPT_ACTIVATE_READONLY; |
680 | ||
f75cac37 | 681 | if (arg_discards) |
2a2aab60 MM |
682 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
683 | ||
0864d311 | 684 | if (arg_timeout == USEC_INFINITY) |
7dcda352 | 685 | until = 0; |
0864d311 AS |
686 | else |
687 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
260ab287 | 688 | |
6131a78b | 689 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 690 | |
10fb4e35 JJ |
691 | if (key_file) { |
692 | struct stat st; | |
e2d480b9 | 693 | |
10fb4e35 JJ |
694 | /* Ideally we'd do this on the open fd, but since this is just a |
695 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
696 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
697 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
698 | } |
699 | ||
f75cac37 | 700 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
ab84f5b9 | 701 | _cleanup_strv_free_erase_ char **passwords = NULL; |
260ab287 LP |
702 | |
703 | if (!key_file) { | |
5f4bfe56 LP |
704 | r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
705 | if (r == -EAGAIN) | |
e7d90b71 | 706 | continue; |
5f4bfe56 | 707 | if (r < 0) |
260ab287 | 708 | goto finish; |
260ab287 LP |
709 | } |
710 | ||
f75cac37 | 711 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
5f4bfe56 | 712 | r = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
8cf3ca80 | 713 | else |
5f4bfe56 | 714 | r = attach_luks_or_plain(cd, |
7376e835 AC |
715 | argv[2], |
716 | key_file, | |
717 | arg_header ? argv[3] : NULL, | |
718 | passwords, | |
719 | flags); | |
5f4bfe56 | 720 | if (r >= 0) |
260ab287 | 721 | break; |
5f4bfe56 | 722 | if (r == -EAGAIN) { |
10fb4e35 JJ |
723 | key_file = NULL; |
724 | continue; | |
5f4bfe56 LP |
725 | } |
726 | if (r != -EPERM) { | |
727 | log_error_errno(r, "Failed to activate: %m"); | |
260ab287 LP |
728 | goto finish; |
729 | } | |
730 | ||
731 | log_warning("Invalid passphrase."); | |
7f4e0805 LP |
732 | } |
733 | ||
f75cac37 | 734 | if (arg_tries != 0 && tries >= arg_tries) { |
10fb4e35 | 735 | log_error("Too many attempts; giving up."); |
5f4bfe56 | 736 | r = -EPERM; |
bd40a2d8 | 737 | goto finish; |
7f4e0805 LP |
738 | } |
739 | ||
740 | } else if (streq(argv[1], "detach")) { | |
7f4e0805 | 741 | |
5f4bfe56 LP |
742 | r = crypt_init_by_name(&cd, argv[2]); |
743 | if (r == -ENODEV) { | |
a0bfc9c2 | 744 | log_info("Volume %s already inactive.", argv[2]); |
5f4bfe56 | 745 | r = 0; |
a0bfc9c2 | 746 | goto finish; |
5f4bfe56 LP |
747 | } |
748 | if (r < 0) { | |
749 | log_error_errno(r, "crypt_init_by_name() failed: %m"); | |
7f4e0805 LP |
750 | goto finish; |
751 | } | |
752 | ||
753 | crypt_set_log_callback(cd, log_glue, NULL); | |
754 | ||
5f4bfe56 LP |
755 | r = crypt_deactivate(cd, argv[2]); |
756 | if (r < 0) { | |
757 | log_error_errno(r, "Failed to deactivate: %m"); | |
7f4e0805 LP |
758 | goto finish; |
759 | } | |
e23a0ce8 LP |
760 | |
761 | } else { | |
762 | log_error("Unknown verb %s.", argv[1]); | |
763 | goto finish; | |
764 | } | |
765 | ||
5f4bfe56 | 766 | r = 0; |
7f4e0805 | 767 | |
e23a0ce8 | 768 | finish: |
7f4e0805 LP |
769 | if (cd) |
770 | crypt_free(cd); | |
771 | ||
f75cac37 LP |
772 | free(arg_cipher); |
773 | free(arg_hash); | |
7376e835 | 774 | free(arg_header); |
f75cac37 | 775 | strv_free(arg_tcrypt_keyfiles); |
260ab287 | 776 | |
5f4bfe56 | 777 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
e23a0ce8 | 778 | } |