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Commit | Line | Data |
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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> |
07630cea LP |
22 | #include <mntent.h> |
23 | #include <string.h> | |
24 | #include <sys/mman.h> | |
e23a0ce8 | 25 | |
4f5dd394 LP |
26 | #include "sd-device.h" |
27 | ||
b5efdb8a | 28 | #include "alloc-util.h" |
4f5dd394 | 29 | #include "ask-password-api.h" |
294bd454 | 30 | #include "crypt-util.h" |
4f5dd394 LP |
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 | /* internal helper */ |
43 | #define ANY_LUKS "LUKS" | |
44 | ||
45 | static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */ | |
f75cac37 LP |
46 | static char *arg_cipher = NULL; |
47 | static unsigned arg_key_size = 0; | |
48 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
49 | static unsigned arg_keyfile_size = 0; | |
dc0a3555 | 50 | static uint64_t arg_keyfile_offset = 0; |
f75cac37 | 51 | static char *arg_hash = NULL; |
7376e835 | 52 | static char *arg_header = NULL; |
f75cac37 LP |
53 | static unsigned arg_tries = 3; |
54 | static bool arg_readonly = false; | |
55 | static bool arg_verify = false; | |
56 | static bool arg_discards = false; | |
57 | static bool arg_tcrypt_hidden = false; | |
58 | static bool arg_tcrypt_system = false; | |
2e914ef4 | 59 | #ifdef CRYPT_TCRYPT_VERA_MODES |
52028838 | 60 | static bool arg_tcrypt_veracrypt = false; |
2e914ef4 | 61 | #endif |
f75cac37 | 62 | static char **arg_tcrypt_keyfiles = NULL; |
4eac2773 MP |
63 | static uint64_t arg_offset = 0; |
64 | static uint64_t arg_skip = 0; | |
0864d311 | 65 | static usec_t arg_timeout = USEC_INFINITY; |
7f4e0805 | 66 | |
1fc76335 LP |
67 | /* Options Debian's crypttab knows we don't: |
68 | ||
1fc76335 LP |
69 | precheck= |
70 | check= | |
71 | checkargs= | |
72 | noearly= | |
73 | loud= | |
74 | keyscript= | |
75 | */ | |
76 | ||
7f4e0805 | 77 | static int parse_one_option(const char *option) { |
fb4650aa ZJS |
78 | const char *val; |
79 | int r; | |
80 | ||
7f4e0805 LP |
81 | assert(option); |
82 | ||
83 | /* Handled outside of this tool */ | |
f7576eb9 | 84 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev")) |
7f4e0805 LP |
85 | return 0; |
86 | ||
fb4650aa ZJS |
87 | if ((val = startswith(option, "cipher="))) { |
88 | r = free_and_strdup(&arg_cipher, val); | |
89 | if (r < 0) | |
4b93637f | 90 | return log_oom(); |
7f4e0805 | 91 | |
fb4650aa | 92 | } else if ((val = startswith(option, "size="))) { |
7f4e0805 | 93 | |
fb4650aa ZJS |
94 | r = safe_atou(val, &arg_key_size); |
95 | if (r < 0) { | |
96 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
97 | return 0; |
98 | } | |
99 | ||
6131a78b DH |
100 | if (arg_key_size % 8) { |
101 | log_error("size= not a multiple of 8, ignoring."); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | arg_key_size /= 8; | |
106 | ||
fb4650aa | 107 | } else if ((val = startswith(option, "key-slot="))) { |
b4a11878 | 108 | |
b3b4ebab | 109 | arg_type = ANY_LUKS; |
fb4650aa ZJS |
110 | r = safe_atoi(val, &arg_key_slot); |
111 | if (r < 0) { | |
112 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
b4a11878 CS |
113 | return 0; |
114 | } | |
115 | ||
fb4650aa | 116 | } else if ((val = startswith(option, "tcrypt-keyfile="))) { |
8cf3ca80 | 117 | |
f75cac37 | 118 | arg_type = CRYPT_TCRYPT; |
fb4650aa ZJS |
119 | if (path_is_absolute(val)) { |
120 | if (strv_extend(&arg_tcrypt_keyfiles, val) < 0) | |
4b93637f LP |
121 | return log_oom(); |
122 | } else | |
fb4650aa | 123 | log_error("Key file path \"%s\" is not absolute. Ignoring.", val); |
8cf3ca80 | 124 | |
fb4650aa | 125 | } else if ((val = startswith(option, "keyfile-size="))) { |
4271d823 | 126 | |
fb4650aa ZJS |
127 | r = safe_atou(val, &arg_keyfile_size); |
128 | if (r < 0) { | |
129 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
4271d823 TG |
130 | return 0; |
131 | } | |
132 | ||
fb4650aa | 133 | } else if ((val = startswith(option, "keyfile-offset="))) { |
dc0a3555 | 134 | uint64_t off; |
880a599e | 135 | |
dc0a3555 | 136 | r = safe_atou64(val, &off); |
fb4650aa ZJS |
137 | if (r < 0) { |
138 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
880a599e TG |
139 | return 0; |
140 | } | |
141 | ||
dc0a3555 ZJS |
142 | if ((size_t) off != off) { |
143 | /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */ | |
144 | log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | arg_keyfile_offset = off; | |
149 | ||
fb4650aa ZJS |
150 | } else if ((val = startswith(option, "hash="))) { |
151 | r = free_and_strdup(&arg_hash, val); | |
152 | if (r < 0) | |
4b93637f | 153 | return log_oom(); |
7f4e0805 | 154 | |
fb4650aa | 155 | } else if ((val = startswith(option, "header="))) { |
b3b4ebab | 156 | arg_type = ANY_LUKS; |
7376e835 | 157 | |
fb4650aa ZJS |
158 | if (!path_is_absolute(val)) { |
159 | log_error("Header path \"%s\" is not absolute, refusing.", val); | |
7376e835 AC |
160 | return -EINVAL; |
161 | } | |
162 | ||
163 | if (arg_header) { | |
fb4650aa | 164 | log_error("Duplicate header= option, refusing."); |
7376e835 AC |
165 | return -EINVAL; |
166 | } | |
167 | ||
fb4650aa | 168 | arg_header = strdup(val); |
7376e835 AC |
169 | if (!arg_header) |
170 | return log_oom(); | |
171 | ||
fb4650aa | 172 | } else if ((val = startswith(option, "tries="))) { |
7f4e0805 | 173 | |
fb4650aa ZJS |
174 | r = safe_atou(val, &arg_tries); |
175 | if (r < 0) { | |
176 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
177 | return 0; |
178 | } | |
179 | ||
f75cac37 LP |
180 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
181 | arg_readonly = true; | |
7f4e0805 | 182 | else if (streq(option, "verify")) |
f75cac37 LP |
183 | arg_verify = true; |
184 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
185 | arg_discards = true; | |
260ab287 | 186 | else if (streq(option, "luks")) |
b3b4ebab | 187 | arg_type = ANY_LUKS; |
8cf3ca80 | 188 | else if (streq(option, "tcrypt")) |
f75cac37 | 189 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 190 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
191 | arg_type = CRYPT_TCRYPT; |
192 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 193 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
194 | arg_type = CRYPT_TCRYPT; |
195 | arg_tcrypt_system = true; | |
52028838 GH |
196 | } else if (streq(option, "tcrypt-veracrypt")) { |
197 | #ifdef CRYPT_TCRYPT_VERA_MODES | |
198 | arg_type = CRYPT_TCRYPT; | |
199 | arg_tcrypt_veracrypt = true; | |
200 | #else | |
201 | log_error("This version of cryptsetup does not support tcrypt-veracrypt; refusing."); | |
202 | return -EINVAL; | |
203 | #endif | |
f75cac37 LP |
204 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) |
205 | arg_type = CRYPT_PLAIN; | |
fb4650aa | 206 | else if ((val = startswith(option, "timeout="))) { |
7f4e0805 | 207 | |
0004f698 | 208 | r = parse_sec_fix_0(val, &arg_timeout); |
fb4650aa ZJS |
209 | if (r < 0) { |
210 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
211 | return 0; |
212 | } | |
213 | ||
fb4650aa | 214 | } else if ((val = startswith(option, "offset="))) { |
4eac2773 | 215 | |
fb4650aa ZJS |
216 | r = safe_atou64(val, &arg_offset); |
217 | if (r < 0) | |
218 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 219 | |
fb4650aa | 220 | } else if ((val = startswith(option, "skip="))) { |
4eac2773 | 221 | |
fb4650aa ZJS |
222 | r = safe_atou64(val, &arg_skip); |
223 | if (r < 0) | |
224 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 225 | |
41e6f28a | 226 | } else if (!streq(option, "none")) |
fb4650aa | 227 | log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
7f4e0805 LP |
228 | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int parse_options(const char *options) { | |
a2a5291b | 233 | const char *word, *state; |
7f4e0805 | 234 | size_t l; |
74b1c371 | 235 | int r; |
7f4e0805 LP |
236 | |
237 | assert(options); | |
238 | ||
a2a5291b | 239 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 240 | _cleanup_free_ char *o; |
7f4e0805 | 241 | |
a2a5291b | 242 | o = strndup(word, l); |
74b1c371 | 243 | if (!o) |
7f4e0805 | 244 | return -ENOMEM; |
7f4e0805 | 245 | r = parse_one_option(o); |
7f4e0805 LP |
246 | if (r < 0) |
247 | return r; | |
248 | } | |
249 | ||
4eac2773 MP |
250 | /* sanity-check options */ |
251 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
252 | if (arg_offset) | |
253 | log_warning("offset= ignored with type %s", arg_type); | |
254 | if (arg_skip) | |
255 | log_warning("skip= ignored with type %s", arg_type); | |
256 | } | |
257 | ||
7f4e0805 LP |
258 | return 0; |
259 | } | |
260 | ||
1ca208fb | 261 | static char* disk_description(const char *path) { |
74b1c371 | 262 | |
f75cac37 | 263 | static const char name_fields[] = |
74b1c371 LP |
264 | "ID_PART_ENTRY_NAME\0" |
265 | "DM_NAME\0" | |
266 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 267 | "ID_MODEL\0"; |
74b1c371 | 268 | |
4afd3348 | 269 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
b1a2da0a | 270 | struct stat st; |
74b1c371 | 271 | const char *i; |
9a97aaae | 272 | int r; |
b1a2da0a LP |
273 | |
274 | assert(path); | |
275 | ||
276 | if (stat(path, &st) < 0) | |
277 | return NULL; | |
278 | ||
279 | if (!S_ISBLK(st.st_mode)) | |
280 | return NULL; | |
281 | ||
9a97aaae TG |
282 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
283 | if (r < 0) | |
1ca208fb | 284 | return NULL; |
b1a2da0a | 285 | |
74b1c371 LP |
286 | NULSTR_FOREACH(i, name_fields) { |
287 | const char *name; | |
288 | ||
9a97aaae TG |
289 | r = sd_device_get_property_value(device, i, &name); |
290 | if (r >= 0 && !isempty(name)) | |
1ca208fb | 291 | return strdup(name); |
74b1c371 | 292 | } |
b1a2da0a | 293 | |
1ca208fb | 294 | return NULL; |
b1a2da0a LP |
295 | } |
296 | ||
b61e476f | 297 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 298 | _cleanup_free_ char *device = NULL; |
5862d652 | 299 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
300 | struct mntent *m; |
301 | ||
302 | /* Yeah, we don't support native systemd unit files here for now */ | |
303 | ||
304 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 305 | return NULL; |
b61e476f | 306 | |
9ffcff0e | 307 | f = setmntent("/etc/fstab", "re"); |
e0295d26 | 308 | if (!f) |
5862d652 | 309 | return NULL; |
b61e476f LP |
310 | |
311 | while ((m = getmntent(f))) | |
5862d652 ZJS |
312 | if (path_equal(m->mnt_fsname, device)) |
313 | return strdup(m->mnt_dir); | |
b61e476f | 314 | |
5862d652 | 315 | return NULL; |
b61e476f LP |
316 | } |
317 | ||
1602b008 | 318 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { |
ea7e7c1e | 319 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *text = NULL, *disk_path = NULL; |
ab84f5b9 | 320 | _cleanup_strv_free_erase_ char **passwords = NULL; |
e51b9486 | 321 | const char *name = NULL; |
e287086b LP |
322 | char **p, *id; |
323 | int r = 0; | |
e7d90b71 | 324 | |
e51b9486 HH |
325 | assert(vol); |
326 | assert(src); | |
1602b008 | 327 | assert(ret); |
e7d90b71 | 328 | |
e51b9486 HH |
329 | description = disk_description(src); |
330 | mount_point = disk_mount_point(vol); | |
331 | ||
ea7e7c1e MS |
332 | disk_path = cescape(src); |
333 | if (!disk_path) | |
334 | return log_oom(); | |
335 | ||
ece174c5 | 336 | if (description && streq(vol, description)) |
e51b9486 HH |
337 | /* If the description string is simply the |
338 | * volume name, then let's not show this | |
339 | * twice */ | |
97b11eed | 340 | description = mfree(description); |
e51b9486 HH |
341 | |
342 | if (mount_point && description) | |
343 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
344 | else if (mount_point) | |
345 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
346 | else if (description) | |
347 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
348 | ||
349 | if (r < 0) | |
350 | return log_oom(); | |
351 | ||
352 | name = name_buffer ? name_buffer : vol; | |
353 | ||
e7d90b71 JJ |
354 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
355 | return log_oom(); | |
356 | ||
ea7e7c1e | 357 | id = strjoina("cryptsetup:", disk_path); |
9fa1de96 | 358 | |
ab84f5b9 ZJS |
359 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, |
360 | ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), | |
361 | &passwords); | |
23bbb0de MS |
362 | if (r < 0) |
363 | return log_error_errno(r, "Failed to query password: %m"); | |
e7d90b71 | 364 | |
f75cac37 | 365 | if (arg_verify) { |
ab84f5b9 ZJS |
366 | _cleanup_strv_free_erase_ char **passwords2 = NULL; |
367 | ||
1602b008 | 368 | assert(strv_length(passwords) == 1); |
e7d90b71 | 369 | |
ab84f5b9 ZJS |
370 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) |
371 | return log_oom(); | |
e7d90b71 | 372 | |
ea7e7c1e | 373 | id = strjoina("cryptsetup-verification:", disk_path); |
9fa1de96 | 374 | |
e287086b | 375 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
ab84f5b9 ZJS |
376 | if (r < 0) |
377 | return log_error_errno(r, "Failed to query verification password: %m"); | |
e7d90b71 JJ |
378 | |
379 | assert(strv_length(passwords2) == 1); | |
380 | ||
1602b008 | 381 | if (!streq(passwords[0], passwords2[0])) { |
e7d90b71 | 382 | log_warning("Passwords did not match, retrying."); |
ab84f5b9 | 383 | return -EAGAIN; |
e7d90b71 JJ |
384 | } |
385 | } | |
386 | ||
1602b008 | 387 | strv_uniq(passwords); |
e7d90b71 | 388 | |
1602b008 | 389 | STRV_FOREACH(p, passwords) { |
e7d90b71 JJ |
390 | char *c; |
391 | ||
f75cac37 | 392 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
393 | continue; |
394 | ||
395 | /* Pad password if necessary */ | |
1602b008 | 396 | c = new(char, arg_key_size); |
ab84f5b9 ZJS |
397 | if (!c) |
398 | return log_oom(); | |
e7d90b71 | 399 | |
f75cac37 | 400 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
401 | free(*p); |
402 | *p = c; | |
403 | } | |
404 | ||
ae2a15bc | 405 | *ret = TAKE_PTR(passwords); |
1602b008 | 406 | |
ab84f5b9 | 407 | return 0; |
e7d90b71 JJ |
408 | } |
409 | ||
1602b008 LP |
410 | static int attach_tcrypt( |
411 | struct crypt_device *cd, | |
412 | const char *name, | |
413 | const char *key_file, | |
414 | char **passwords, | |
415 | uint32_t flags) { | |
416 | ||
8cf3ca80 JJ |
417 | int r = 0; |
418 | _cleanup_free_ char *passphrase = NULL; | |
419 | struct crypt_params_tcrypt params = { | |
420 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
421 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
422 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
423 | }; |
424 | ||
425 | assert(cd); | |
426 | assert(name); | |
f268f57f | 427 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 428 | |
f75cac37 | 429 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
430 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
431 | ||
f75cac37 | 432 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
433 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
434 | ||
52028838 GH |
435 | #ifdef CRYPT_TCRYPT_VERA_MODES |
436 | if (arg_tcrypt_veracrypt) | |
437 | params.flags |= CRYPT_TCRYPT_VERA_MODES; | |
438 | #endif | |
439 | ||
8cf3ca80 JJ |
440 | if (key_file) { |
441 | r = read_one_line_file(key_file, &passphrase); | |
442 | if (r < 0) { | |
da927ba9 | 443 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
444 | return -EAGAIN; |
445 | } | |
446 | ||
447 | params.passphrase = passphrase; | |
448 | } else | |
449 | params.passphrase = passwords[0]; | |
450 | params.passphrase_size = strlen(params.passphrase); | |
451 | ||
452 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
453 | if (r < 0) { | |
454 | if (key_file && r == -EPERM) { | |
455 | log_error("Failed to activate using password file '%s'.", key_file); | |
456 | return -EAGAIN; | |
457 | } | |
458 | return r; | |
459 | } | |
460 | ||
ac1a87b9 | 461 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
462 | } |
463 | ||
10fb4e35 JJ |
464 | static int attach_luks_or_plain(struct crypt_device *cd, |
465 | const char *name, | |
466 | const char *key_file, | |
7376e835 | 467 | const char *data_device, |
10fb4e35 JJ |
468 | char **passwords, |
469 | uint32_t flags) { | |
470 | int r = 0; | |
471 | bool pass_volume_key = false; | |
472 | ||
473 | assert(cd); | |
474 | assert(name); | |
475 | assert(key_file || passwords); | |
476 | ||
b3b4ebab OK |
477 | if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) { |
478 | r = crypt_load(cd, CRYPT_LUKS, NULL); | |
7376e835 AC |
479 | if (r < 0) { |
480 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
481 | return r; | |
482 | } | |
483 | ||
484 | if (data_device) | |
485 | r = crypt_set_data_device(cd, data_device); | |
486 | } | |
10fb4e35 | 487 | |
f75cac37 | 488 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
489 | struct crypt_params_plain params = { |
490 | .offset = arg_offset, | |
491 | .skip = arg_skip, | |
492 | }; | |
10fb4e35 JJ |
493 | const char *cipher, *cipher_mode; |
494 | _cleanup_free_ char *truncated_cipher = NULL; | |
495 | ||
f75cac37 | 496 | if (arg_hash) { |
10fb4e35 | 497 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
498 | if (!streq(arg_hash, "plain")) |
499 | params.hash = arg_hash; | |
8a52210c ZJS |
500 | } else if (!key_file) |
501 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
502 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
503 | params.hash = "ripemd160"; |
504 | ||
f75cac37 | 505 | if (arg_cipher) { |
10fb4e35 JJ |
506 | size_t l; |
507 | ||
f75cac37 LP |
508 | l = strcspn(arg_cipher, "-"); |
509 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
510 | if (!truncated_cipher) |
511 | return log_oom(); | |
512 | ||
513 | cipher = truncated_cipher; | |
f75cac37 | 514 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
515 | } else { |
516 | cipher = "aes"; | |
517 | cipher_mode = "cbc-essiv:sha256"; | |
518 | } | |
519 | ||
520 | /* for CRYPT_PLAIN limit reads | |
521 | * from keyfile to key length, and | |
522 | * ignore keyfile-size */ | |
6131a78b | 523 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
524 | |
525 | /* In contrast to what the name | |
526 | * crypt_setup() might suggest this | |
527 | * doesn't actually format anything, | |
528 | * it just configures encryption | |
529 | * parameters when used for plain | |
530 | * mode. */ | |
1602b008 | 531 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
532 | |
533 | /* hash == NULL implies the user passed "plain" */ | |
534 | pass_volume_key = (params.hash == NULL); | |
535 | } | |
536 | ||
23bbb0de MS |
537 | if (r < 0) |
538 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
539 | |
540 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
541 | crypt_get_cipher(cd), | |
542 | crypt_get_cipher_mode(cd), | |
543 | crypt_get_volume_key_size(cd)*8, | |
544 | crypt_get_device_name(cd)); | |
545 | ||
546 | if (key_file) { | |
1602b008 | 547 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); |
10fb4e35 | 548 | if (r < 0) { |
da927ba9 | 549 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
550 | return -EAGAIN; |
551 | } | |
552 | } else { | |
553 | char **p; | |
554 | ||
555 | STRV_FOREACH(p, passwords) { | |
556 | if (pass_volume_key) | |
f75cac37 | 557 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 558 | else |
f75cac37 | 559 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
560 | |
561 | if (r >= 0) | |
562 | break; | |
563 | } | |
564 | } | |
565 | ||
566 | return r; | |
567 | } | |
568 | ||
dd5e696d LP |
569 | static int help(void) { |
570 | ||
571 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
572 | "%s detach VOLUME\n\n" | |
573 | "Attaches or detaches an encrypted block device.\n", | |
574 | program_invocation_short_name, | |
575 | program_invocation_short_name); | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
e23a0ce8 | 580 | int main(int argc, char *argv[]) { |
294bd454 | 581 | _cleanup_(crypt_freep) struct crypt_device *cd = NULL; |
81a6ac6c | 582 | int r = -EINVAL; |
e23a0ce8 | 583 | |
dd5e696d | 584 | if (argc <= 1) { |
5f4bfe56 LP |
585 | r = help(); |
586 | goto finish; | |
dd5e696d LP |
587 | } |
588 | ||
e23a0ce8 LP |
589 | if (argc < 3) { |
590 | log_error("This program requires at least two arguments."); | |
5f4bfe56 | 591 | goto finish; |
e23a0ce8 LP |
592 | } |
593 | ||
bb7df0da | 594 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
595 | log_parse_environment(); |
596 | log_open(); | |
597 | ||
4c12626c LP |
598 | umask(0022); |
599 | ||
260ab287 | 600 | if (streq(argv[1], "attach")) { |
7f4e0805 | 601 | uint32_t flags = 0; |
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); | |
5f4bfe56 | 635 | r = crypt_init(&cd, arg_header); |
7376e835 | 636 | } else |
5f4bfe56 LP |
637 | r = crypt_init(&cd, argv[3]); |
638 | if (r < 0) { | |
639 | log_error_errno(r, "crypt_init() failed: %m"); | |
7f4e0805 LP |
640 | goto finish; |
641 | } | |
e23a0ce8 | 642 | |
691c2e2e | 643 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 644 | |
260ab287 | 645 | status = crypt_status(cd, argv[2]); |
3742095b | 646 | if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) { |
260ab287 | 647 | log_info("Volume %s already active.", argv[2]); |
5f4bfe56 | 648 | r = 0; |
7f4e0805 LP |
649 | goto finish; |
650 | } | |
651 | ||
f75cac37 | 652 | if (arg_readonly) |
7f4e0805 LP |
653 | flags |= CRYPT_ACTIVATE_READONLY; |
654 | ||
f75cac37 | 655 | if (arg_discards) |
2a2aab60 MM |
656 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
657 | ||
0864d311 | 658 | if (arg_timeout == USEC_INFINITY) |
7dcda352 | 659 | until = 0; |
0864d311 AS |
660 | else |
661 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
260ab287 | 662 | |
6131a78b | 663 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 664 | |
10fb4e35 JJ |
665 | if (key_file) { |
666 | struct stat st; | |
e2d480b9 | 667 | |
10fb4e35 JJ |
668 | /* Ideally we'd do this on the open fd, but since this is just a |
669 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
670 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
671 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
672 | } |
673 | ||
f75cac37 | 674 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
ab84f5b9 | 675 | _cleanup_strv_free_erase_ char **passwords = NULL; |
260ab287 LP |
676 | |
677 | if (!key_file) { | |
5f4bfe56 LP |
678 | r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
679 | if (r == -EAGAIN) | |
e7d90b71 | 680 | continue; |
5f4bfe56 | 681 | if (r < 0) |
260ab287 | 682 | goto finish; |
260ab287 LP |
683 | } |
684 | ||
f75cac37 | 685 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
5f4bfe56 | 686 | r = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
8cf3ca80 | 687 | else |
5f4bfe56 | 688 | r = attach_luks_or_plain(cd, |
7376e835 AC |
689 | argv[2], |
690 | key_file, | |
691 | arg_header ? argv[3] : NULL, | |
692 | passwords, | |
693 | flags); | |
5f4bfe56 | 694 | if (r >= 0) |
260ab287 | 695 | break; |
5f4bfe56 | 696 | if (r == -EAGAIN) { |
10fb4e35 JJ |
697 | key_file = NULL; |
698 | continue; | |
5f4bfe56 LP |
699 | } |
700 | if (r != -EPERM) { | |
701 | log_error_errno(r, "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."); |
5f4bfe56 | 710 | r = -EPERM; |
bd40a2d8 | 711 | goto finish; |
7f4e0805 LP |
712 | } |
713 | ||
714 | } else if (streq(argv[1], "detach")) { | |
7f4e0805 | 715 | |
5f4bfe56 LP |
716 | r = crypt_init_by_name(&cd, argv[2]); |
717 | if (r == -ENODEV) { | |
a0bfc9c2 | 718 | log_info("Volume %s already inactive.", argv[2]); |
5f4bfe56 | 719 | r = 0; |
a0bfc9c2 | 720 | goto finish; |
5f4bfe56 LP |
721 | } |
722 | if (r < 0) { | |
723 | log_error_errno(r, "crypt_init_by_name() failed: %m"); | |
7f4e0805 LP |
724 | goto finish; |
725 | } | |
726 | ||
691c2e2e | 727 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 728 | |
5f4bfe56 LP |
729 | r = crypt_deactivate(cd, argv[2]); |
730 | if (r < 0) { | |
731 | log_error_errno(r, "Failed to deactivate: %m"); | |
7f4e0805 LP |
732 | goto finish; |
733 | } | |
e23a0ce8 LP |
734 | |
735 | } else { | |
736 | log_error("Unknown verb %s.", argv[1]); | |
737 | goto finish; | |
738 | } | |
739 | ||
5f4bfe56 | 740 | r = 0; |
7f4e0805 | 741 | |
e23a0ce8 | 742 | finish: |
f75cac37 LP |
743 | free(arg_cipher); |
744 | free(arg_hash); | |
7376e835 | 745 | free(arg_header); |
f75cac37 | 746 | strv_free(arg_tcrypt_keyfiles); |
260ab287 | 747 | |
5f4bfe56 | 748 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
e23a0ce8 | 749 | } |