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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 | 26 | #include <libcryptsetup.h> |
e23a0ce8 | 27 | |
4f5dd394 LP |
28 | #include "sd-device.h" |
29 | ||
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" |
9eb977db | 35 | #include "path-util.h" |
21bc923a | 36 | #include "strv.h" |
4f5dd394 | 37 | #include "util.h" |
7f4e0805 | 38 | |
f75cac37 LP |
39 | static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ |
40 | static char *arg_cipher = NULL; | |
41 | static unsigned arg_key_size = 0; | |
42 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
43 | static unsigned arg_keyfile_size = 0; | |
44 | static unsigned arg_keyfile_offset = 0; | |
45 | static char *arg_hash = NULL; | |
7376e835 | 46 | static char *arg_header = NULL; |
f75cac37 LP |
47 | static unsigned arg_tries = 3; |
48 | static bool arg_readonly = false; | |
49 | static bool arg_verify = false; | |
50 | static bool arg_discards = false; | |
51 | static bool arg_tcrypt_hidden = false; | |
52 | static bool arg_tcrypt_system = false; | |
53 | static char **arg_tcrypt_keyfiles = NULL; | |
4eac2773 MP |
54 | static uint64_t arg_offset = 0; |
55 | static uint64_t arg_skip = 0; | |
f75cac37 | 56 | static usec_t arg_timeout = 0; |
7f4e0805 | 57 | |
1fc76335 LP |
58 | /* Options Debian's crypttab knows we don't: |
59 | ||
1fc76335 LP |
60 | precheck= |
61 | check= | |
62 | checkargs= | |
63 | noearly= | |
64 | loud= | |
65 | keyscript= | |
66 | */ | |
67 | ||
7f4e0805 LP |
68 | static int parse_one_option(const char *option) { |
69 | assert(option); | |
70 | ||
71 | /* Handled outside of this tool */ | |
b9f111b9 | 72 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail")) |
7f4e0805 LP |
73 | return 0; |
74 | ||
75 | if (startswith(option, "cipher=")) { | |
76 | char *t; | |
77 | ||
74b1c371 LP |
78 | t = strdup(option+7); |
79 | if (!t) | |
4b93637f | 80 | return log_oom(); |
7f4e0805 | 81 | |
f75cac37 LP |
82 | free(arg_cipher); |
83 | arg_cipher = t; | |
7f4e0805 LP |
84 | |
85 | } else if (startswith(option, "size=")) { | |
86 | ||
f75cac37 | 87 | if (safe_atou(option+5, &arg_key_size) < 0) { |
7f4e0805 LP |
88 | log_error("size= parse failure, ignoring."); |
89 | return 0; | |
90 | } | |
91 | ||
6131a78b DH |
92 | if (arg_key_size % 8) { |
93 | log_error("size= not a multiple of 8, ignoring."); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | arg_key_size /= 8; | |
98 | ||
b4a11878 CS |
99 | } else if (startswith(option, "key-slot=")) { |
100 | ||
f75cac37 LP |
101 | arg_type = CRYPT_LUKS1; |
102 | if (safe_atoi(option+9, &arg_key_slot) < 0) { | |
b4a11878 CS |
103 | log_error("key-slot= parse failure, ignoring."); |
104 | return 0; | |
105 | } | |
106 | ||
8cf3ca80 JJ |
107 | } else if (startswith(option, "tcrypt-keyfile=")) { |
108 | ||
f75cac37 | 109 | arg_type = CRYPT_TCRYPT; |
4b93637f | 110 | if (path_is_absolute(option+15)) { |
f75cac37 | 111 | if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) |
4b93637f LP |
112 | return log_oom(); |
113 | } else | |
8cf3ca80 JJ |
114 | log_error("Key file path '%s' is not absolute. Ignoring.", option+15); |
115 | ||
4271d823 TG |
116 | } else if (startswith(option, "keyfile-size=")) { |
117 | ||
f75cac37 | 118 | if (safe_atou(option+13, &arg_keyfile_size) < 0) { |
4271d823 TG |
119 | log_error("keyfile-size= parse failure, ignoring."); |
120 | return 0; | |
121 | } | |
122 | ||
880a599e TG |
123 | } else if (startswith(option, "keyfile-offset=")) { |
124 | ||
f75cac37 | 125 | if (safe_atou(option+15, &arg_keyfile_offset) < 0) { |
880a599e TG |
126 | log_error("keyfile-offset= parse failure, ignoring."); |
127 | return 0; | |
128 | } | |
129 | ||
7f4e0805 LP |
130 | } else if (startswith(option, "hash=")) { |
131 | char *t; | |
132 | ||
74b1c371 LP |
133 | t = strdup(option+5); |
134 | if (!t) | |
4b93637f | 135 | return log_oom(); |
7f4e0805 | 136 | |
f75cac37 LP |
137 | free(arg_hash); |
138 | arg_hash = t; | |
7f4e0805 | 139 | |
7376e835 AC |
140 | } else if (startswith(option, "header=")) { |
141 | arg_type = CRYPT_LUKS1; | |
142 | ||
143 | if (!path_is_absolute(option+7)) { | |
144 | log_error("Header path '%s' is not absolute, refusing.", option+7); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | if (arg_header) { | |
149 | log_error("Duplicate header= options, refusing."); | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
153 | arg_header = strdup(option+7); | |
154 | if (!arg_header) | |
155 | return log_oom(); | |
156 | ||
7f4e0805 LP |
157 | } else if (startswith(option, "tries=")) { |
158 | ||
f75cac37 | 159 | if (safe_atou(option+6, &arg_tries) < 0) { |
7f4e0805 LP |
160 | log_error("tries= parse failure, ignoring."); |
161 | return 0; | |
162 | } | |
163 | ||
f75cac37 LP |
164 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
165 | arg_readonly = true; | |
7f4e0805 | 166 | else if (streq(option, "verify")) |
f75cac37 LP |
167 | arg_verify = true; |
168 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
169 | arg_discards = true; | |
260ab287 | 170 | else if (streq(option, "luks")) |
f75cac37 | 171 | arg_type = CRYPT_LUKS1; |
8cf3ca80 | 172 | else if (streq(option, "tcrypt")) |
f75cac37 | 173 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 174 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
175 | arg_type = CRYPT_TCRYPT; |
176 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 177 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
178 | arg_type = CRYPT_TCRYPT; |
179 | arg_tcrypt_system = true; | |
180 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) | |
181 | arg_type = CRYPT_PLAIN; | |
7f4e0805 LP |
182 | else if (startswith(option, "timeout=")) { |
183 | ||
f75cac37 | 184 | if (parse_sec(option+8, &arg_timeout) < 0) { |
7f4e0805 LP |
185 | log_error("timeout= parse failure, ignoring."); |
186 | return 0; | |
187 | } | |
188 | ||
4eac2773 MP |
189 | } else if (startswith(option, "offset=")) { |
190 | ||
191 | if (safe_atou64(option+7, &arg_offset) < 0) { | |
192 | log_error("offset= parse failure, refusing."); | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | } else if (startswith(option, "skip=")) { | |
197 | ||
198 | if (safe_atou64(option+5, &arg_skip) < 0) { | |
199 | log_error("skip= parse failure, refusing."); | |
200 | return -EINVAL; | |
201 | } | |
202 | ||
41e6f28a | 203 | } else if (!streq(option, "none")) |
7f4e0805 LP |
204 | log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static int parse_options(const char *options) { | |
a2a5291b | 210 | const char *word, *state; |
7f4e0805 | 211 | size_t l; |
74b1c371 | 212 | int r; |
7f4e0805 LP |
213 | |
214 | assert(options); | |
215 | ||
a2a5291b | 216 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 217 | _cleanup_free_ char *o; |
7f4e0805 | 218 | |
a2a5291b | 219 | o = strndup(word, l); |
74b1c371 | 220 | if (!o) |
7f4e0805 | 221 | return -ENOMEM; |
7f4e0805 | 222 | r = parse_one_option(o); |
7f4e0805 LP |
223 | if (r < 0) |
224 | return r; | |
225 | } | |
226 | ||
4eac2773 MP |
227 | /* sanity-check options */ |
228 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
229 | if (arg_offset) | |
230 | log_warning("offset= ignored with type %s", arg_type); | |
231 | if (arg_skip) | |
232 | log_warning("skip= ignored with type %s", arg_type); | |
233 | } | |
234 | ||
7f4e0805 LP |
235 | return 0; |
236 | } | |
237 | ||
238 | static void log_glue(int level, const char *msg, void *usrptr) { | |
260ab287 | 239 | log_debug("%s", msg); |
7f4e0805 | 240 | } |
e23a0ce8 | 241 | |
e51b9486 HH |
242 | static int disk_major_minor(const char *path, char **ret) { |
243 | struct stat st; | |
244 | ||
245 | assert(path); | |
246 | ||
247 | if (stat(path, &st) < 0) | |
248 | return -errno; | |
249 | ||
250 | if (!S_ISBLK(st.st_mode)) | |
251 | return -EINVAL; | |
252 | ||
253 | if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
254 | return -errno; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
1ca208fb | 259 | static char* disk_description(const char *path) { |
74b1c371 | 260 | |
f75cac37 | 261 | static const char name_fields[] = |
74b1c371 LP |
262 | "ID_PART_ENTRY_NAME\0" |
263 | "DM_NAME\0" | |
264 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 265 | "ID_MODEL\0"; |
74b1c371 | 266 | |
9a97aaae | 267 | _cleanup_device_unref_ sd_device *device = NULL; |
b1a2da0a | 268 | struct stat st; |
74b1c371 | 269 | const char *i; |
9a97aaae | 270 | int r; |
b1a2da0a LP |
271 | |
272 | assert(path); | |
273 | ||
274 | if (stat(path, &st) < 0) | |
275 | return NULL; | |
276 | ||
277 | if (!S_ISBLK(st.st_mode)) | |
278 | return NULL; | |
279 | ||
9a97aaae TG |
280 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
281 | if (r < 0) | |
1ca208fb | 282 | return NULL; |
b1a2da0a | 283 | |
74b1c371 LP |
284 | NULSTR_FOREACH(i, name_fields) { |
285 | const char *name; | |
286 | ||
9a97aaae TG |
287 | r = sd_device_get_property_value(device, i, &name); |
288 | if (r >= 0 && !isempty(name)) | |
1ca208fb | 289 | return strdup(name); |
74b1c371 | 290 | } |
b1a2da0a | 291 | |
1ca208fb | 292 | return NULL; |
b1a2da0a LP |
293 | } |
294 | ||
b61e476f | 295 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 296 | _cleanup_free_ char *device = NULL; |
5862d652 | 297 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
298 | struct mntent *m; |
299 | ||
300 | /* Yeah, we don't support native systemd unit files here for now */ | |
301 | ||
302 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 303 | return NULL; |
b61e476f | 304 | |
e0295d26 LP |
305 | f = setmntent("/etc/fstab", "r"); |
306 | if (!f) | |
5862d652 | 307 | return NULL; |
b61e476f LP |
308 | |
309 | while ((m = getmntent(f))) | |
5862d652 ZJS |
310 | if (path_equal(m->mnt_fsname, device)) |
311 | return strdup(m->mnt_dir); | |
b61e476f | 312 | |
5862d652 | 313 | return NULL; |
b61e476f LP |
314 | } |
315 | ||
1602b008 | 316 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { |
e287086b | 317 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL; |
ab84f5b9 | 318 | _cleanup_strv_free_erase_ char **passwords = NULL; |
e51b9486 | 319 | const char *name = NULL; |
e287086b LP |
320 | char **p, *id; |
321 | int r = 0; | |
e7d90b71 | 322 | |
e51b9486 HH |
323 | assert(vol); |
324 | assert(src); | |
1602b008 | 325 | assert(ret); |
e7d90b71 | 326 | |
e51b9486 HH |
327 | description = disk_description(src); |
328 | mount_point = disk_mount_point(vol); | |
329 | ||
ece174c5 | 330 | if (description && streq(vol, description)) |
e51b9486 HH |
331 | /* If the description string is simply the |
332 | * volume name, then let's not show this | |
333 | * twice */ | |
97b11eed | 334 | description = mfree(description); |
e51b9486 HH |
335 | |
336 | if (mount_point && description) | |
337 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
338 | else if (mount_point) | |
339 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
340 | else if (description) | |
341 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
342 | ||
343 | if (r < 0) | |
344 | return log_oom(); | |
345 | ||
346 | name = name_buffer ? name_buffer : vol; | |
347 | ||
e7d90b71 JJ |
348 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
349 | return log_oom(); | |
350 | ||
e51b9486 HH |
351 | if (src) |
352 | (void) disk_major_minor(src, &maj_min); | |
353 | ||
354 | if (maj_min) { | |
355 | escaped_name = maj_min; | |
356 | maj_min = NULL; | |
357 | } else | |
358 | escaped_name = cescape(name); | |
359 | ||
9fa1de96 DH |
360 | if (!escaped_name) |
361 | return log_oom(); | |
362 | ||
63c372cb | 363 | id = strjoina("cryptsetup:", escaped_name); |
9fa1de96 | 364 | |
ab84f5b9 ZJS |
365 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, |
366 | ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), | |
367 | &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) { |
ab84f5b9 ZJS |
372 | _cleanup_strv_free_erase_ char **passwords2 = NULL; |
373 | ||
1602b008 | 374 | assert(strv_length(passwords) == 1); |
e7d90b71 | 375 | |
ab84f5b9 ZJS |
376 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) |
377 | return log_oom(); | |
e7d90b71 | 378 | |
63c372cb | 379 | id = strjoina("cryptsetup-verification:", escaped_name); |
9fa1de96 | 380 | |
e287086b | 381 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
ab84f5b9 ZJS |
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 | ||
1602b008 | 387 | if (!streq(passwords[0], passwords2[0])) { |
e7d90b71 | 388 | log_warning("Passwords did not match, retrying."); |
ab84f5b9 | 389 | return -EAGAIN; |
e7d90b71 JJ |
390 | } |
391 | } | |
392 | ||
1602b008 | 393 | strv_uniq(passwords); |
e7d90b71 | 394 | |
1602b008 | 395 | STRV_FOREACH(p, passwords) { |
e7d90b71 JJ |
396 | char *c; |
397 | ||
f75cac37 | 398 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
399 | continue; |
400 | ||
401 | /* Pad password if necessary */ | |
1602b008 | 402 | c = new(char, arg_key_size); |
ab84f5b9 ZJS |
403 | if (!c) |
404 | return log_oom(); | |
e7d90b71 | 405 | |
f75cac37 | 406 | strncpy(c, *p, arg_key_size); |
e7d90b71 JJ |
407 | free(*p); |
408 | *p = c; | |
409 | } | |
410 | ||
1602b008 LP |
411 | *ret = passwords; |
412 | passwords = NULL; | |
413 | ||
ab84f5b9 | 414 | return 0; |
e7d90b71 JJ |
415 | } |
416 | ||
1602b008 LP |
417 | static int attach_tcrypt( |
418 | struct crypt_device *cd, | |
419 | const char *name, | |
420 | const char *key_file, | |
421 | char **passwords, | |
422 | uint32_t flags) { | |
423 | ||
8cf3ca80 JJ |
424 | int r = 0; |
425 | _cleanup_free_ char *passphrase = NULL; | |
426 | struct crypt_params_tcrypt params = { | |
427 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
428 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
429 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
430 | }; |
431 | ||
432 | assert(cd); | |
433 | assert(name); | |
f268f57f | 434 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 435 | |
f75cac37 | 436 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
437 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
438 | ||
f75cac37 | 439 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
440 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
441 | ||
442 | if (key_file) { | |
443 | r = read_one_line_file(key_file, &passphrase); | |
444 | if (r < 0) { | |
da927ba9 | 445 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
8cf3ca80 JJ |
446 | return -EAGAIN; |
447 | } | |
448 | ||
449 | params.passphrase = passphrase; | |
450 | } else | |
451 | params.passphrase = passwords[0]; | |
452 | params.passphrase_size = strlen(params.passphrase); | |
453 | ||
454 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
455 | if (r < 0) { | |
456 | if (key_file && r == -EPERM) { | |
457 | log_error("Failed to activate using password file '%s'.", key_file); | |
458 | return -EAGAIN; | |
459 | } | |
460 | return r; | |
461 | } | |
462 | ||
ac1a87b9 | 463 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
8cf3ca80 JJ |
464 | } |
465 | ||
10fb4e35 JJ |
466 | static int attach_luks_or_plain(struct crypt_device *cd, |
467 | const char *name, | |
468 | const char *key_file, | |
7376e835 | 469 | const char *data_device, |
10fb4e35 JJ |
470 | char **passwords, |
471 | uint32_t flags) { | |
472 | int r = 0; | |
473 | bool pass_volume_key = false; | |
474 | ||
475 | assert(cd); | |
476 | assert(name); | |
477 | assert(key_file || passwords); | |
478 | ||
7376e835 | 479 | if (!arg_type || streq(arg_type, CRYPT_LUKS1)) { |
10fb4e35 | 480 | r = crypt_load(cd, CRYPT_LUKS1, NULL); |
7376e835 AC |
481 | if (r < 0) { |
482 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
483 | return r; | |
484 | } | |
485 | ||
486 | if (data_device) | |
487 | r = crypt_set_data_device(cd, data_device); | |
488 | } | |
10fb4e35 | 489 | |
f75cac37 | 490 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
491 | struct crypt_params_plain params = { |
492 | .offset = arg_offset, | |
493 | .skip = arg_skip, | |
494 | }; | |
10fb4e35 JJ |
495 | const char *cipher, *cipher_mode; |
496 | _cleanup_free_ char *truncated_cipher = NULL; | |
497 | ||
f75cac37 | 498 | if (arg_hash) { |
10fb4e35 | 499 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
500 | if (!streq(arg_hash, "plain")) |
501 | params.hash = arg_hash; | |
8a52210c ZJS |
502 | } else if (!key_file) |
503 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
504 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
505 | params.hash = "ripemd160"; |
506 | ||
f75cac37 | 507 | if (arg_cipher) { |
10fb4e35 JJ |
508 | size_t l; |
509 | ||
f75cac37 LP |
510 | l = strcspn(arg_cipher, "-"); |
511 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
512 | if (!truncated_cipher) |
513 | return log_oom(); | |
514 | ||
515 | cipher = truncated_cipher; | |
f75cac37 | 516 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
517 | } else { |
518 | cipher = "aes"; | |
519 | cipher_mode = "cbc-essiv:sha256"; | |
520 | } | |
521 | ||
522 | /* for CRYPT_PLAIN limit reads | |
523 | * from keyfile to key length, and | |
524 | * ignore keyfile-size */ | |
6131a78b | 525 | arg_keyfile_size = arg_key_size; |
10fb4e35 JJ |
526 | |
527 | /* In contrast to what the name | |
528 | * crypt_setup() might suggest this | |
529 | * doesn't actually format anything, | |
530 | * it just configures encryption | |
531 | * parameters when used for plain | |
532 | * mode. */ | |
1602b008 | 533 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
534 | |
535 | /* hash == NULL implies the user passed "plain" */ | |
536 | pass_volume_key = (params.hash == NULL); | |
537 | } | |
538 | ||
23bbb0de MS |
539 | if (r < 0) |
540 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
541 | |
542 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
543 | crypt_get_cipher(cd), | |
544 | crypt_get_cipher_mode(cd), | |
545 | crypt_get_volume_key_size(cd)*8, | |
546 | crypt_get_device_name(cd)); | |
547 | ||
548 | if (key_file) { | |
1602b008 | 549 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); |
10fb4e35 | 550 | if (r < 0) { |
da927ba9 | 551 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
10fb4e35 JJ |
552 | return -EAGAIN; |
553 | } | |
554 | } else { | |
555 | char **p; | |
556 | ||
557 | STRV_FOREACH(p, passwords) { | |
558 | if (pass_volume_key) | |
f75cac37 | 559 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 560 | else |
f75cac37 | 561 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
562 | |
563 | if (r >= 0) | |
564 | break; | |
565 | } | |
566 | } | |
567 | ||
568 | return r; | |
569 | } | |
570 | ||
dd5e696d LP |
571 | static int help(void) { |
572 | ||
573 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
574 | "%s detach VOLUME\n\n" | |
575 | "Attaches or detaches an encrypted block device.\n", | |
576 | program_invocation_short_name, | |
577 | program_invocation_short_name); | |
578 | ||
579 | return 0; | |
580 | } | |
581 | ||
e23a0ce8 | 582 | int main(int argc, char *argv[]) { |
7f4e0805 LP |
583 | int r = EXIT_FAILURE; |
584 | struct crypt_device *cd = NULL; | |
e23a0ce8 | 585 | |
dd5e696d LP |
586 | if (argc <= 1) { |
587 | help(); | |
588 | return EXIT_SUCCESS; | |
589 | } | |
590 | ||
e23a0ce8 LP |
591 | if (argc < 3) { |
592 | log_error("This program requires at least two arguments."); | |
593 | return EXIT_FAILURE; | |
594 | } | |
595 | ||
bb7df0da | 596 | log_set_target(LOG_TARGET_AUTO); |
e23a0ce8 LP |
597 | log_parse_environment(); |
598 | log_open(); | |
599 | ||
4c12626c LP |
600 | umask(0022); |
601 | ||
260ab287 | 602 | if (streq(argv[1], "attach")) { |
7f4e0805 LP |
603 | uint32_t flags = 0; |
604 | int k; | |
10fb4e35 | 605 | unsigned tries; |
260ab287 | 606 | usec_t until; |
e2d480b9 | 607 | crypt_status_info status; |
e51b9486 | 608 | const char *key_file = NULL; |
7f4e0805 | 609 | |
b61e476f LP |
610 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
611 | ||
7f4e0805 LP |
612 | if (argc < 4) { |
613 | log_error("attach requires at least two arguments."); | |
614 | goto finish; | |
615 | } | |
616 | ||
1fc76335 LP |
617 | if (argc >= 5 && |
618 | argv[4][0] && | |
619 | !streq(argv[4], "-") && | |
620 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
621 | |
622 | if (!path_is_absolute(argv[4])) | |
8cf3ca80 | 623 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
624 | else |
625 | key_file = argv[4]; | |
626 | } | |
627 | ||
74b1c371 LP |
628 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
629 | if (parse_options(argv[5]) < 0) | |
630 | goto finish; | |
631 | } | |
e23a0ce8 | 632 | |
b853f6e9 LP |
633 | /* A delicious drop of snake oil */ |
634 | mlockall(MCL_FUTURE); | |
635 | ||
7376e835 AC |
636 | if (arg_header) { |
637 | log_debug("LUKS header: %s", arg_header); | |
638 | k = crypt_init(&cd, arg_header); | |
639 | } else | |
640 | k = crypt_init(&cd, argv[3]); | |
74b1c371 | 641 | if (k) { |
da927ba9 | 642 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
643 | goto finish; |
644 | } | |
e23a0ce8 | 645 | |
7f4e0805 | 646 | crypt_set_log_callback(cd, log_glue, NULL); |
7f4e0805 | 647 | |
260ab287 LP |
648 | status = crypt_status(cd, argv[2]); |
649 | if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { | |
650 | log_info("Volume %s already active.", argv[2]); | |
651 | r = EXIT_SUCCESS; | |
7f4e0805 LP |
652 | goto finish; |
653 | } | |
654 | ||
f75cac37 | 655 | if (arg_readonly) |
7f4e0805 LP |
656 | flags |= CRYPT_ACTIVATE_READONLY; |
657 | ||
f75cac37 | 658 | if (arg_discards) |
2a2aab60 MM |
659 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
660 | ||
f75cac37 LP |
661 | if (arg_timeout > 0) |
662 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
7dcda352 LP |
663 | else |
664 | until = 0; | |
260ab287 | 665 | |
6131a78b | 666 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 667 | |
10fb4e35 JJ |
668 | if (key_file) { |
669 | struct stat st; | |
e2d480b9 | 670 | |
10fb4e35 JJ |
671 | /* Ideally we'd do this on the open fd, but since this is just a |
672 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
673 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
674 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
675 | } |
676 | ||
f75cac37 | 677 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
ab84f5b9 | 678 | _cleanup_strv_free_erase_ char **passwords = NULL; |
260ab287 LP |
679 | |
680 | if (!key_file) { | |
e51b9486 | 681 | k = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
e7d90b71 JJ |
682 | if (k == -EAGAIN) |
683 | continue; | |
684 | else if (k < 0) | |
260ab287 | 685 | goto finish; |
260ab287 LP |
686 | } |
687 | ||
f75cac37 | 688 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
8cf3ca80 JJ |
689 | k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
690 | else | |
7376e835 AC |
691 | k = attach_luks_or_plain(cd, |
692 | argv[2], | |
693 | key_file, | |
694 | arg_header ? argv[3] : NULL, | |
695 | passwords, | |
696 | flags); | |
260ab287 LP |
697 | if (k >= 0) |
698 | break; | |
10fb4e35 JJ |
699 | else if (k == -EAGAIN) { |
700 | key_file = NULL; | |
701 | continue; | |
702 | } else if (k != -EPERM) { | |
da927ba9 | 703 | log_error_errno(k, "Failed to activate: %m"); |
260ab287 LP |
704 | goto finish; |
705 | } | |
706 | ||
707 | log_warning("Invalid passphrase."); | |
7f4e0805 LP |
708 | } |
709 | ||
f75cac37 | 710 | if (arg_tries != 0 && tries >= arg_tries) { |
10fb4e35 | 711 | log_error("Too many attempts; giving up."); |
260ab287 | 712 | r = EXIT_FAILURE; |
bd40a2d8 | 713 | goto finish; |
7f4e0805 LP |
714 | } |
715 | ||
716 | } else if (streq(argv[1], "detach")) { | |
717 | int k; | |
718 | ||
74b1c371 LP |
719 | k = crypt_init_by_name(&cd, argv[2]); |
720 | if (k) { | |
da927ba9 | 721 | log_error_errno(k, "crypt_init() failed: %m"); |
7f4e0805 LP |
722 | goto finish; |
723 | } | |
724 | ||
725 | crypt_set_log_callback(cd, log_glue, NULL); | |
726 | ||
74b1c371 LP |
727 | k = crypt_deactivate(cd, argv[2]); |
728 | if (k < 0) { | |
da927ba9 | 729 | log_error_errno(k, "Failed to deactivate: %m"); |
7f4e0805 LP |
730 | goto finish; |
731 | } | |
e23a0ce8 LP |
732 | |
733 | } else { | |
734 | log_error("Unknown verb %s.", argv[1]); | |
735 | goto finish; | |
736 | } | |
737 | ||
7f4e0805 LP |
738 | r = EXIT_SUCCESS; |
739 | ||
e23a0ce8 | 740 | finish: |
7f4e0805 LP |
741 | |
742 | if (cd) | |
743 | crypt_free(cd); | |
744 | ||
f75cac37 LP |
745 | free(arg_cipher); |
746 | free(arg_hash); | |
7376e835 | 747 | free(arg_header); |
f75cac37 | 748 | strv_free(arg_tcrypt_keyfiles); |
260ab287 | 749 | |
e23a0ce8 LP |
750 | return r; |
751 | } |