]>
Commit | Line | Data |
---|---|---|
663996b3 MS |
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 | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <errno.h> | |
24 | #include <sys/mman.h> | |
25 | #include <mntent.h> | |
26 | ||
27 | #include <libcryptsetup.h> | |
663996b3 | 28 | |
14228c0d | 29 | #include "fileio.h" |
663996b3 MS |
30 | #include "log.h" |
31 | #include "util.h" | |
32 | #include "path-util.h" | |
33 | #include "strv.h" | |
34 | #include "ask-password-api.h" | |
e3bff60a MP |
35 | #include "sd-device.h" |
36 | #include "device-util.h" | |
60f067b4 JS |
37 | |
38 | static const char *arg_type = NULL; /* CRYPT_LUKS1, CRYPT_TCRYPT or CRYPT_PLAIN */ | |
39 | static char *arg_cipher = NULL; | |
40 | static unsigned arg_key_size = 0; | |
41 | static int arg_key_slot = CRYPT_ANY_SLOT; | |
42 | static unsigned arg_keyfile_size = 0; | |
43 | static unsigned arg_keyfile_offset = 0; | |
44 | static char *arg_hash = NULL; | |
e735f4d4 | 45 | static char *arg_header = NULL; |
60f067b4 JS |
46 | static unsigned arg_tries = 3; |
47 | static bool arg_readonly = false; | |
48 | static bool arg_verify = false; | |
49 | static bool arg_discards = false; | |
50 | static bool arg_tcrypt_hidden = false; | |
51 | static bool arg_tcrypt_system = false; | |
52 | static char **arg_tcrypt_keyfiles = NULL; | |
e3bff60a MP |
53 | static uint64_t arg_offset = 0; |
54 | static uint64_t arg_skip = 0; | |
60f067b4 | 55 | static usec_t arg_timeout = 0; |
663996b3 MS |
56 | |
57 | /* Options Debian's crypttab knows we don't: | |
58 | ||
663996b3 MS |
59 | precheck= |
60 | check= | |
61 | checkargs= | |
62 | noearly= | |
63 | loud= | |
64 | keyscript= | |
65 | */ | |
66 | ||
67 | static int parse_one_option(const char *option) { | |
68 | assert(option); | |
69 | ||
70 | /* Handled outside of this tool */ | |
e735f4d4 | 71 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail")) |
663996b3 MS |
72 | return 0; |
73 | ||
74 | if (startswith(option, "cipher=")) { | |
75 | char *t; | |
76 | ||
77 | t = strdup(option+7); | |
78 | if (!t) | |
60f067b4 | 79 | return log_oom(); |
663996b3 | 80 | |
60f067b4 JS |
81 | free(arg_cipher); |
82 | arg_cipher = t; | |
663996b3 MS |
83 | |
84 | } else if (startswith(option, "size=")) { | |
85 | ||
60f067b4 | 86 | if (safe_atou(option+5, &arg_key_size) < 0) { |
663996b3 MS |
87 | log_error("size= parse failure, ignoring."); |
88 | return 0; | |
89 | } | |
90 | ||
60f067b4 JS |
91 | if (arg_key_size % 8) { |
92 | log_error("size= not a multiple of 8, ignoring."); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | arg_key_size /= 8; | |
97 | ||
98 | } else if (startswith(option, "key-slot=")) { | |
99 | ||
100 | arg_type = CRYPT_LUKS1; | |
101 | if (safe_atoi(option+9, &arg_key_slot) < 0) { | |
102 | log_error("key-slot= parse failure, ignoring."); | |
103 | return 0; | |
104 | } | |
105 | ||
14228c0d MB |
106 | } else if (startswith(option, "tcrypt-keyfile=")) { |
107 | ||
60f067b4 JS |
108 | arg_type = CRYPT_TCRYPT; |
109 | if (path_is_absolute(option+15)) { | |
110 | if (strv_extend(&arg_tcrypt_keyfiles, option + 15) < 0) | |
111 | return log_oom(); | |
112 | } else | |
14228c0d MB |
113 | log_error("Key file path '%s' is not absolute. Ignoring.", option+15); |
114 | ||
663996b3 MS |
115 | } else if (startswith(option, "keyfile-size=")) { |
116 | ||
60f067b4 | 117 | if (safe_atou(option+13, &arg_keyfile_size) < 0) { |
663996b3 MS |
118 | log_error("keyfile-size= parse failure, ignoring."); |
119 | return 0; | |
120 | } | |
121 | ||
122 | } else if (startswith(option, "keyfile-offset=")) { | |
123 | ||
60f067b4 | 124 | if (safe_atou(option+15, &arg_keyfile_offset) < 0) { |
663996b3 MS |
125 | log_error("keyfile-offset= parse failure, ignoring."); |
126 | return 0; | |
127 | } | |
128 | ||
129 | } else if (startswith(option, "hash=")) { | |
130 | char *t; | |
131 | ||
132 | t = strdup(option+5); | |
133 | if (!t) | |
60f067b4 | 134 | return log_oom(); |
663996b3 | 135 | |
60f067b4 JS |
136 | free(arg_hash); |
137 | arg_hash = t; | |
663996b3 | 138 | |
e735f4d4 MP |
139 | } else if (startswith(option, "header=")) { |
140 | arg_type = CRYPT_LUKS1; | |
141 | ||
142 | if (!path_is_absolute(option+7)) { | |
143 | log_error("Header path '%s' is not absolute, refusing.", option+7); | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | if (arg_header) { | |
148 | log_error("Duplicate header= options, refusing."); | |
149 | return -EINVAL; | |
150 | } | |
151 | ||
152 | arg_header = strdup(option+7); | |
153 | if (!arg_header) | |
154 | return log_oom(); | |
155 | ||
663996b3 MS |
156 | } else if (startswith(option, "tries=")) { |
157 | ||
60f067b4 | 158 | if (safe_atou(option+6, &arg_tries) < 0) { |
663996b3 MS |
159 | log_error("tries= parse failure, ignoring."); |
160 | return 0; | |
161 | } | |
162 | ||
60f067b4 JS |
163 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
164 | arg_readonly = true; | |
663996b3 | 165 | else if (streq(option, "verify")) |
60f067b4 JS |
166 | arg_verify = true; |
167 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
168 | arg_discards = true; | |
663996b3 | 169 | else if (streq(option, "luks")) |
60f067b4 | 170 | arg_type = CRYPT_LUKS1; |
14228c0d | 171 | else if (streq(option, "tcrypt")) |
60f067b4 | 172 | arg_type = CRYPT_TCRYPT; |
14228c0d | 173 | else if (streq(option, "tcrypt-hidden")) { |
60f067b4 JS |
174 | arg_type = CRYPT_TCRYPT; |
175 | arg_tcrypt_hidden = true; | |
14228c0d | 176 | } else if (streq(option, "tcrypt-system")) { |
60f067b4 JS |
177 | arg_type = CRYPT_TCRYPT; |
178 | arg_tcrypt_system = true; | |
179 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) | |
180 | arg_type = CRYPT_PLAIN; | |
663996b3 MS |
181 | else if (startswith(option, "timeout=")) { |
182 | ||
60f067b4 | 183 | if (parse_sec(option+8, &arg_timeout) < 0) { |
663996b3 MS |
184 | log_error("timeout= parse failure, ignoring."); |
185 | return 0; | |
186 | } | |
187 | ||
e3bff60a MP |
188 | } else if (startswith(option, "offset=")) { |
189 | ||
190 | if (safe_atou64(option+7, &arg_offset) < 0) { | |
191 | log_error("offset= parse failure, refusing."); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | } else if (startswith(option, "skip=")) { | |
196 | ||
197 | if (safe_atou64(option+5, &arg_skip) < 0) { | |
198 | log_error("skip= parse failure, refusing."); | |
199 | return -EINVAL; | |
200 | } | |
201 | ||
663996b3 MS |
202 | } else if (!streq(option, "none")) |
203 | log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int parse_options(const char *options) { | |
5eef597e | 209 | const char *word, *state; |
663996b3 MS |
210 | size_t l; |
211 | int r; | |
212 | ||
213 | assert(options); | |
214 | ||
5eef597e | 215 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
663996b3 MS |
216 | _cleanup_free_ char *o; |
217 | ||
5eef597e | 218 | o = strndup(word, l); |
663996b3 MS |
219 | if (!o) |
220 | return -ENOMEM; | |
221 | r = parse_one_option(o); | |
222 | if (r < 0) | |
223 | return r; | |
224 | } | |
225 | ||
e3bff60a MP |
226 | /* sanity-check options */ |
227 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
228 | if (arg_offset) | |
229 | log_warning("offset= ignored with type %s", arg_type); | |
230 | if (arg_skip) | |
231 | log_warning("skip= ignored with type %s", arg_type); | |
232 | } | |
233 | ||
663996b3 MS |
234 | return 0; |
235 | } | |
236 | ||
237 | static void log_glue(int level, const char *msg, void *usrptr) { | |
238 | log_debug("%s", msg); | |
239 | } | |
240 | ||
86f210e9 MP |
241 | static int disk_major_minor(const char *path, char **ret) { |
242 | struct stat st; | |
243 | ||
244 | assert(path); | |
245 | ||
246 | if (stat(path, &st) < 0) | |
247 | return -errno; | |
248 | ||
249 | if (!S_ISBLK(st.st_mode)) | |
250 | return -EINVAL; | |
251 | ||
252 | if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) | |
253 | return -errno; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
60f067b4 | 258 | static char* disk_description(const char *path) { |
663996b3 | 259 | |
60f067b4 | 260 | static const char name_fields[] = |
663996b3 MS |
261 | "ID_PART_ENTRY_NAME\0" |
262 | "DM_NAME\0" | |
263 | "ID_MODEL_FROM_DATABASE\0" | |
60f067b4 | 264 | "ID_MODEL\0"; |
663996b3 | 265 | |
e3bff60a | 266 | _cleanup_device_unref_ sd_device *device = NULL; |
663996b3 | 267 | struct stat st; |
663996b3 | 268 | const char *i; |
e3bff60a | 269 | int r; |
663996b3 MS |
270 | |
271 | assert(path); | |
272 | ||
273 | if (stat(path, &st) < 0) | |
274 | return NULL; | |
275 | ||
276 | if (!S_ISBLK(st.st_mode)) | |
277 | return NULL; | |
278 | ||
e3bff60a MP |
279 | r = sd_device_new_from_devnum(&device, 'b', st.st_rdev); |
280 | if (r < 0) | |
60f067b4 | 281 | return NULL; |
663996b3 MS |
282 | |
283 | NULSTR_FOREACH(i, name_fields) { | |
284 | const char *name; | |
285 | ||
e3bff60a MP |
286 | r = sd_device_get_property_value(device, i, &name); |
287 | if (r >= 0 && !isempty(name)) | |
60f067b4 | 288 | return strdup(name); |
663996b3 MS |
289 | } |
290 | ||
60f067b4 | 291 | return NULL; |
663996b3 MS |
292 | } |
293 | ||
294 | static char *disk_mount_point(const char *label) { | |
14228c0d | 295 | _cleanup_free_ char *device = NULL; |
60f067b4 | 296 | _cleanup_endmntent_ FILE *f = NULL; |
663996b3 MS |
297 | struct mntent *m; |
298 | ||
299 | /* Yeah, we don't support native systemd unit files here for now */ | |
300 | ||
301 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
60f067b4 | 302 | return NULL; |
663996b3 MS |
303 | |
304 | f = setmntent("/etc/fstab", "r"); | |
305 | if (!f) | |
60f067b4 | 306 | return NULL; |
663996b3 MS |
307 | |
308 | while ((m = getmntent(f))) | |
60f067b4 JS |
309 | if (path_equal(m->mnt_fsname, device)) |
310 | return strdup(m->mnt_dir); | |
663996b3 | 311 | |
60f067b4 | 312 | return NULL; |
663996b3 MS |
313 | } |
314 | ||
86f210e9 | 315 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***passwords) { |
6300502b | 316 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL; |
86f210e9 | 317 | const char *name = NULL; |
6300502b MP |
318 | char **p, *id; |
319 | int r = 0; | |
14228c0d | 320 | |
86f210e9 MP |
321 | assert(vol); |
322 | assert(src); | |
14228c0d MB |
323 | assert(passwords); |
324 | ||
86f210e9 MP |
325 | description = disk_description(src); |
326 | mount_point = disk_mount_point(vol); | |
327 | ||
6300502b | 328 | if (description && streq(vol, description)) |
86f210e9 MP |
329 | /* If the description string is simply the |
330 | * volume name, then let's not show this | |
331 | * twice */ | |
13d276d0 | 332 | description = mfree(description); |
86f210e9 MP |
333 | |
334 | if (mount_point && description) | |
335 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
336 | else if (mount_point) | |
337 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
338 | else if (description) | |
339 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
340 | ||
341 | if (r < 0) | |
342 | return log_oom(); | |
343 | ||
344 | name = name_buffer ? name_buffer : vol; | |
345 | ||
14228c0d MB |
346 | if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) |
347 | return log_oom(); | |
348 | ||
86f210e9 MP |
349 | if (src) |
350 | (void) disk_major_minor(src, &maj_min); | |
351 | ||
352 | if (maj_min) { | |
353 | escaped_name = maj_min; | |
354 | maj_min = NULL; | |
355 | } else | |
356 | escaped_name = cescape(name); | |
357 | ||
60f067b4 JS |
358 | if (!escaped_name) |
359 | return log_oom(); | |
360 | ||
e735f4d4 | 361 | id = strjoina("cryptsetup:", escaped_name); |
60f067b4 | 362 | |
6300502b | 363 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE|(accept_cached ? ASK_PASSWORD_ACCEPT_CACHED : 0), passwords); |
f47781d8 MP |
364 | if (r < 0) |
365 | return log_error_errno(r, "Failed to query password: %m"); | |
14228c0d | 366 | |
60f067b4 | 367 | if (arg_verify) { |
14228c0d MB |
368 | _cleanup_strv_free_ char **passwords2 = NULL; |
369 | ||
370 | assert(strv_length(*passwords) == 1); | |
371 | ||
372 | if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) | |
373 | return log_oom(); | |
374 | ||
e735f4d4 | 375 | id = strjoina("cryptsetup-verification:", escaped_name); |
60f067b4 | 376 | |
6300502b | 377 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
f47781d8 MP |
378 | if (r < 0) |
379 | return log_error_errno(r, "Failed to query verification password: %m"); | |
14228c0d MB |
380 | |
381 | assert(strv_length(passwords2) == 1); | |
382 | ||
383 | if (!streq(*passwords[0], passwords2[0])) { | |
384 | log_warning("Passwords did not match, retrying."); | |
385 | return -EAGAIN; | |
386 | } | |
387 | } | |
388 | ||
389 | strv_uniq(*passwords); | |
390 | ||
391 | STRV_FOREACH(p, *passwords) { | |
392 | char *c; | |
393 | ||
60f067b4 | 394 | if (strlen(*p)+1 >= arg_key_size) |
14228c0d MB |
395 | continue; |
396 | ||
397 | /* Pad password if necessary */ | |
60f067b4 | 398 | if (!(c = new(char, arg_key_size))) |
14228c0d MB |
399 | return log_oom(); |
400 | ||
60f067b4 | 401 | strncpy(c, *p, arg_key_size); |
14228c0d MB |
402 | free(*p); |
403 | *p = c; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int attach_tcrypt(struct crypt_device *cd, | |
410 | const char *name, | |
411 | const char *key_file, | |
412 | char **passwords, | |
413 | uint32_t flags) { | |
414 | int r = 0; | |
415 | _cleanup_free_ char *passphrase = NULL; | |
416 | struct crypt_params_tcrypt params = { | |
417 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
60f067b4 JS |
418 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
419 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
14228c0d MB |
420 | }; |
421 | ||
422 | assert(cd); | |
423 | assert(name); | |
e842803a | 424 | assert(key_file || (passwords && passwords[0])); |
14228c0d | 425 | |
60f067b4 | 426 | if (arg_tcrypt_hidden) |
14228c0d MB |
427 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
428 | ||
60f067b4 | 429 | if (arg_tcrypt_system) |
14228c0d MB |
430 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
431 | ||
432 | if (key_file) { | |
433 | r = read_one_line_file(key_file, &passphrase); | |
434 | if (r < 0) { | |
f47781d8 | 435 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
14228c0d MB |
436 | return -EAGAIN; |
437 | } | |
438 | ||
439 | params.passphrase = passphrase; | |
440 | } else | |
441 | params.passphrase = passwords[0]; | |
442 | params.passphrase_size = strlen(params.passphrase); | |
443 | ||
444 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
445 | if (r < 0) { | |
446 | if (key_file && r == -EPERM) { | |
447 | log_error("Failed to activate using password file '%s'.", key_file); | |
448 | return -EAGAIN; | |
449 | } | |
450 | return r; | |
451 | } | |
452 | ||
60f067b4 | 453 | return crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
14228c0d MB |
454 | } |
455 | ||
456 | static int attach_luks_or_plain(struct crypt_device *cd, | |
457 | const char *name, | |
458 | const char *key_file, | |
e735f4d4 | 459 | const char *data_device, |
14228c0d MB |
460 | char **passwords, |
461 | uint32_t flags) { | |
462 | int r = 0; | |
463 | bool pass_volume_key = false; | |
464 | ||
465 | assert(cd); | |
466 | assert(name); | |
467 | assert(key_file || passwords); | |
468 | ||
e735f4d4 | 469 | if (!arg_type || streq(arg_type, CRYPT_LUKS1)) { |
14228c0d | 470 | r = crypt_load(cd, CRYPT_LUKS1, NULL); |
e735f4d4 MP |
471 | if (r < 0) { |
472 | log_error("crypt_load() failed on device %s.\n", crypt_get_device_name(cd)); | |
473 | return r; | |
474 | } | |
475 | ||
476 | if (data_device) | |
477 | r = crypt_set_data_device(cd, data_device); | |
478 | } | |
14228c0d | 479 | |
60f067b4 | 480 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
e3bff60a MP |
481 | struct crypt_params_plain params = { |
482 | .offset = arg_offset, | |
483 | .skip = arg_skip, | |
484 | }; | |
14228c0d MB |
485 | const char *cipher, *cipher_mode; |
486 | _cleanup_free_ char *truncated_cipher = NULL; | |
487 | ||
60f067b4 | 488 | if (arg_hash) { |
14228c0d | 489 | /* plain isn't a real hash type. it just means "use no hash" */ |
60f067b4 JS |
490 | if (!streq(arg_hash, "plain")) |
491 | params.hash = arg_hash; | |
f47781d8 MP |
492 | } else if (!key_file) |
493 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
494 | * package is to not hash when a key file is provided */ | |
14228c0d MB |
495 | params.hash = "ripemd160"; |
496 | ||
60f067b4 | 497 | if (arg_cipher) { |
14228c0d MB |
498 | size_t l; |
499 | ||
60f067b4 JS |
500 | l = strcspn(arg_cipher, "-"); |
501 | truncated_cipher = strndup(arg_cipher, l); | |
14228c0d MB |
502 | if (!truncated_cipher) |
503 | return log_oom(); | |
504 | ||
505 | cipher = truncated_cipher; | |
60f067b4 | 506 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
14228c0d MB |
507 | } else { |
508 | cipher = "aes"; | |
509 | cipher_mode = "cbc-essiv:sha256"; | |
510 | } | |
511 | ||
512 | /* for CRYPT_PLAIN limit reads | |
513 | * from keyfile to key length, and | |
514 | * ignore keyfile-size */ | |
60f067b4 | 515 | arg_keyfile_size = arg_key_size; |
14228c0d MB |
516 | |
517 | /* In contrast to what the name | |
518 | * crypt_setup() might suggest this | |
519 | * doesn't actually format anything, | |
520 | * it just configures encryption | |
521 | * parameters when used for plain | |
522 | * mode. */ | |
523 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, | |
60f067b4 | 524 | NULL, NULL, arg_keyfile_size, ¶ms); |
14228c0d MB |
525 | |
526 | /* hash == NULL implies the user passed "plain" */ | |
527 | pass_volume_key = (params.hash == NULL); | |
528 | } | |
529 | ||
f47781d8 MP |
530 | if (r < 0) |
531 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
14228c0d MB |
532 | |
533 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
534 | crypt_get_cipher(cd), | |
535 | crypt_get_cipher_mode(cd), | |
536 | crypt_get_volume_key_size(cd)*8, | |
537 | crypt_get_device_name(cd)); | |
538 | ||
539 | if (key_file) { | |
60f067b4 JS |
540 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, |
541 | key_file, arg_keyfile_size, | |
542 | arg_keyfile_offset, flags); | |
14228c0d | 543 | if (r < 0) { |
f47781d8 | 544 | log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); |
14228c0d MB |
545 | return -EAGAIN; |
546 | } | |
547 | } else { | |
548 | char **p; | |
549 | ||
550 | STRV_FOREACH(p, passwords) { | |
551 | if (pass_volume_key) | |
60f067b4 | 552 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
14228c0d | 553 | else |
60f067b4 | 554 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
14228c0d MB |
555 | |
556 | if (r >= 0) | |
557 | break; | |
558 | } | |
559 | } | |
560 | ||
561 | return r; | |
562 | } | |
563 | ||
663996b3 MS |
564 | static int help(void) { |
565 | ||
566 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
567 | "%s detach VOLUME\n\n" | |
568 | "Attaches or detaches an encrypted block device.\n", | |
569 | program_invocation_short_name, | |
570 | program_invocation_short_name); | |
571 | ||
572 | return 0; | |
573 | } | |
574 | ||
575 | int main(int argc, char *argv[]) { | |
576 | int r = EXIT_FAILURE; | |
577 | struct crypt_device *cd = NULL; | |
663996b3 MS |
578 | |
579 | if (argc <= 1) { | |
580 | help(); | |
581 | return EXIT_SUCCESS; | |
582 | } | |
583 | ||
584 | if (argc < 3) { | |
585 | log_error("This program requires at least two arguments."); | |
586 | return EXIT_FAILURE; | |
587 | } | |
588 | ||
589 | log_set_target(LOG_TARGET_AUTO); | |
590 | log_parse_environment(); | |
591 | log_open(); | |
592 | ||
593 | umask(0022); | |
594 | ||
595 | if (streq(argv[1], "attach")) { | |
596 | uint32_t flags = 0; | |
597 | int k; | |
14228c0d | 598 | unsigned tries; |
663996b3 MS |
599 | usec_t until; |
600 | crypt_status_info status; | |
86f210e9 | 601 | const char *key_file = NULL; |
663996b3 MS |
602 | |
603 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ | |
604 | ||
605 | if (argc < 4) { | |
606 | log_error("attach requires at least two arguments."); | |
607 | goto finish; | |
608 | } | |
609 | ||
610 | if (argc >= 5 && | |
611 | argv[4][0] && | |
612 | !streq(argv[4], "-") && | |
613 | !streq(argv[4], "none")) { | |
614 | ||
615 | if (!path_is_absolute(argv[4])) | |
14228c0d | 616 | log_error("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
663996b3 MS |
617 | else |
618 | key_file = argv[4]; | |
619 | } | |
620 | ||
621 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { | |
622 | if (parse_options(argv[5]) < 0) | |
623 | goto finish; | |
624 | } | |
625 | ||
626 | /* A delicious drop of snake oil */ | |
627 | mlockall(MCL_FUTURE); | |
628 | ||
e735f4d4 MP |
629 | if (arg_header) { |
630 | log_debug("LUKS header: %s", arg_header); | |
631 | k = crypt_init(&cd, arg_header); | |
632 | } else | |
633 | k = crypt_init(&cd, argv[3]); | |
634 | ||
663996b3 | 635 | if (k) { |
f47781d8 | 636 | log_error_errno(k, "crypt_init() failed: %m"); |
663996b3 MS |
637 | goto finish; |
638 | } | |
639 | ||
640 | crypt_set_log_callback(cd, log_glue, NULL); | |
641 | ||
642 | status = crypt_status(cd, argv[2]); | |
643 | if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) { | |
644 | log_info("Volume %s already active.", argv[2]); | |
645 | r = EXIT_SUCCESS; | |
646 | goto finish; | |
647 | } | |
648 | ||
60f067b4 | 649 | if (arg_readonly) |
663996b3 MS |
650 | flags |= CRYPT_ACTIVATE_READONLY; |
651 | ||
60f067b4 | 652 | if (arg_discards) |
663996b3 MS |
653 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
654 | ||
60f067b4 JS |
655 | if (arg_timeout > 0) |
656 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
663996b3 MS |
657 | else |
658 | until = 0; | |
659 | ||
60f067b4 | 660 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
663996b3 | 661 | |
14228c0d MB |
662 | if (key_file) { |
663 | struct stat st; | |
663996b3 | 664 | |
14228c0d MB |
665 | /* Ideally we'd do this on the open fd, but since this is just a |
666 | * warning it's OK to do this in two steps. */ | |
e735f4d4 | 667 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
14228c0d | 668 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); |
663996b3 MS |
669 | } |
670 | ||
60f067b4 | 671 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
14228c0d | 672 | _cleanup_strv_free_ char **passwords = NULL; |
663996b3 MS |
673 | |
674 | if (!key_file) { | |
86f210e9 | 675 | k = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
14228c0d | 676 | if (k == -EAGAIN) |
663996b3 | 677 | continue; |
14228c0d MB |
678 | else if (k < 0) |
679 | goto finish; | |
663996b3 MS |
680 | } |
681 | ||
60f067b4 | 682 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
14228c0d MB |
683 | k = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
684 | else | |
e735f4d4 MP |
685 | k = attach_luks_or_plain(cd, |
686 | argv[2], | |
687 | key_file, | |
688 | arg_header ? argv[3] : NULL, | |
689 | passwords, | |
690 | flags); | |
663996b3 MS |
691 | if (k >= 0) |
692 | break; | |
14228c0d MB |
693 | else if (k == -EAGAIN) { |
694 | key_file = NULL; | |
695 | continue; | |
696 | } else if (k != -EPERM) { | |
f47781d8 | 697 | log_error_errno(k, "Failed to activate: %m"); |
663996b3 MS |
698 | goto finish; |
699 | } | |
700 | ||
701 | log_warning("Invalid passphrase."); | |
702 | } | |
703 | ||
60f067b4 | 704 | if (arg_tries != 0 && tries >= arg_tries) { |
14228c0d | 705 | log_error("Too many attempts; giving up."); |
663996b3 MS |
706 | r = EXIT_FAILURE; |
707 | goto finish; | |
708 | } | |
709 | ||
710 | } else if (streq(argv[1], "detach")) { | |
711 | int k; | |
712 | ||
713 | k = crypt_init_by_name(&cd, argv[2]); | |
714 | if (k) { | |
f47781d8 | 715 | log_error_errno(k, "crypt_init() failed: %m"); |
663996b3 MS |
716 | goto finish; |
717 | } | |
718 | ||
719 | crypt_set_log_callback(cd, log_glue, NULL); | |
720 | ||
721 | k = crypt_deactivate(cd, argv[2]); | |
722 | if (k < 0) { | |
f47781d8 | 723 | log_error_errno(k, "Failed to deactivate: %m"); |
663996b3 MS |
724 | goto finish; |
725 | } | |
726 | ||
727 | } else { | |
728 | log_error("Unknown verb %s.", argv[1]); | |
729 | goto finish; | |
730 | } | |
731 | ||
732 | r = EXIT_SUCCESS; | |
733 | ||
734 | finish: | |
735 | ||
736 | if (cd) | |
737 | crypt_free(cd); | |
738 | ||
60f067b4 JS |
739 | free(arg_cipher); |
740 | free(arg_hash); | |
e735f4d4 | 741 | free(arg_header); |
60f067b4 | 742 | strv_free(arg_tcrypt_keyfiles); |
663996b3 MS |
743 | |
744 | return r; | |
745 | } |