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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e23a0ce8 | 2 | |
7f4e0805 | 3 | #include <errno.h> |
07630cea LP |
4 | #include <mntent.h> |
5 | #include <string.h> | |
6 | #include <sys/mman.h> | |
e23a0ce8 | 7 | |
4f5dd394 LP |
8 | #include "sd-device.h" |
9 | ||
b5efdb8a | 10 | #include "alloc-util.h" |
4f5dd394 | 11 | #include "ask-password-api.h" |
294bd454 | 12 | #include "crypt-util.h" |
4f5dd394 LP |
13 | #include "device-util.h" |
14 | #include "escape.h" | |
8cf3ca80 | 15 | #include "fileio.h" |
e23a0ce8 | 16 | #include "log.h" |
3a40f366 | 17 | #include "main-func.h" |
4349cd7c | 18 | #include "mount-util.h" |
6bedfcbb | 19 | #include "parse-util.h" |
9eb977db | 20 | #include "path-util.h" |
07630cea | 21 | #include "string-util.h" |
21bc923a | 22 | #include "strv.h" |
294bf0c3 | 23 | #include "pretty-print.h" |
4f5dd394 | 24 | #include "util.h" |
7f4e0805 | 25 | |
b3b4ebab OK |
26 | /* internal helper */ |
27 | #define ANY_LUKS "LUKS" | |
a9fc6406 DJL |
28 | /* as in src/cryptsetup.h */ |
29 | #define CRYPT_SECTOR_SIZE 512 | |
30 | #define CRYPT_MAX_SECTOR_SIZE 4096 | |
b3b4ebab OK |
31 | |
32 | static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */ | |
f75cac37 LP |
33 | static char *arg_cipher = NULL; |
34 | static unsigned arg_key_size = 0; | |
645461f0 | 35 | #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE |
a9fc6406 | 36 | static unsigned arg_sector_size = CRYPT_SECTOR_SIZE; |
645461f0 | 37 | #endif |
f75cac37 LP |
38 | static int arg_key_slot = CRYPT_ANY_SLOT; |
39 | static unsigned arg_keyfile_size = 0; | |
dc0a3555 | 40 | static uint64_t arg_keyfile_offset = 0; |
f75cac37 | 41 | static char *arg_hash = NULL; |
7376e835 | 42 | static char *arg_header = NULL; |
f75cac37 LP |
43 | static unsigned arg_tries = 3; |
44 | static bool arg_readonly = false; | |
45 | static bool arg_verify = false; | |
46 | static bool arg_discards = false; | |
47 | static bool arg_tcrypt_hidden = false; | |
48 | static bool arg_tcrypt_system = false; | |
2e914ef4 | 49 | #ifdef CRYPT_TCRYPT_VERA_MODES |
52028838 | 50 | static bool arg_tcrypt_veracrypt = false; |
2e914ef4 | 51 | #endif |
f75cac37 | 52 | static char **arg_tcrypt_keyfiles = NULL; |
4eac2773 MP |
53 | static uint64_t arg_offset = 0; |
54 | static uint64_t arg_skip = 0; | |
0864d311 | 55 | static usec_t arg_timeout = USEC_INFINITY; |
7f4e0805 | 56 | |
3a40f366 YW |
57 | STATIC_DESTRUCTOR_REGISTER(arg_cipher, freep); |
58 | STATIC_DESTRUCTOR_REGISTER(arg_hash, freep); | |
59 | STATIC_DESTRUCTOR_REGISTER(arg_header, freep); | |
60 | STATIC_DESTRUCTOR_REGISTER(arg_tcrypt_keyfiles, strv_freep); | |
61 | ||
1fc76335 LP |
62 | /* Options Debian's crypttab knows we don't: |
63 | ||
1fc76335 LP |
64 | precheck= |
65 | check= | |
66 | checkargs= | |
67 | noearly= | |
68 | loud= | |
69 | keyscript= | |
70 | */ | |
71 | ||
7f4e0805 | 72 | static int parse_one_option(const char *option) { |
fb4650aa ZJS |
73 | const char *val; |
74 | int r; | |
75 | ||
7f4e0805 LP |
76 | assert(option); |
77 | ||
78 | /* Handled outside of this tool */ | |
f7576eb9 | 79 | if (STR_IN_SET(option, "noauto", "auto", "nofail", "fail", "_netdev")) |
7f4e0805 LP |
80 | return 0; |
81 | ||
fb4650aa ZJS |
82 | if ((val = startswith(option, "cipher="))) { |
83 | r = free_and_strdup(&arg_cipher, val); | |
84 | if (r < 0) | |
4b93637f | 85 | return log_oom(); |
7f4e0805 | 86 | |
fb4650aa | 87 | } else if ((val = startswith(option, "size="))) { |
7f4e0805 | 88 | |
fb4650aa ZJS |
89 | r = safe_atou(val, &arg_key_size); |
90 | if (r < 0) { | |
91 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
92 | return 0; |
93 | } | |
94 | ||
6131a78b DH |
95 | if (arg_key_size % 8) { |
96 | log_error("size= not a multiple of 8, ignoring."); | |
97 | return 0; | |
98 | } | |
99 | ||
100 | arg_key_size /= 8; | |
101 | ||
a9fc6406 DJL |
102 | } else if ((val = startswith(option, "sector-size="))) { |
103 | ||
104 | #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE | |
105 | r = safe_atou(val, &arg_sector_size); | |
106 | if (r < 0) { | |
107 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | if (arg_sector_size % 2) { | |
112 | log_error("sector-size= not a multiple of 2, ignoring."); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | if (arg_sector_size < CRYPT_SECTOR_SIZE || arg_sector_size > CRYPT_MAX_SECTOR_SIZE) { | |
117 | log_error("sector-size= is outside of %u and %u, ignoring.", CRYPT_SECTOR_SIZE, CRYPT_MAX_SECTOR_SIZE); | |
118 | return 0; | |
119 | } | |
120 | #else | |
121 | log_error("sector-size= is not supported, compiled with old libcryptsetup."); | |
122 | return 0; | |
123 | #endif | |
124 | ||
fb4650aa | 125 | } else if ((val = startswith(option, "key-slot="))) { |
b4a11878 | 126 | |
b3b4ebab | 127 | arg_type = ANY_LUKS; |
fb4650aa ZJS |
128 | r = safe_atoi(val, &arg_key_slot); |
129 | if (r < 0) { | |
130 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
b4a11878 CS |
131 | return 0; |
132 | } | |
133 | ||
fb4650aa | 134 | } else if ((val = startswith(option, "tcrypt-keyfile="))) { |
8cf3ca80 | 135 | |
f75cac37 | 136 | arg_type = CRYPT_TCRYPT; |
fb4650aa ZJS |
137 | if (path_is_absolute(val)) { |
138 | if (strv_extend(&arg_tcrypt_keyfiles, val) < 0) | |
4b93637f LP |
139 | return log_oom(); |
140 | } else | |
fb4650aa | 141 | log_error("Key file path \"%s\" is not absolute. Ignoring.", val); |
8cf3ca80 | 142 | |
fb4650aa | 143 | } else if ((val = startswith(option, "keyfile-size="))) { |
4271d823 | 144 | |
fb4650aa ZJS |
145 | r = safe_atou(val, &arg_keyfile_size); |
146 | if (r < 0) { | |
147 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
4271d823 TG |
148 | return 0; |
149 | } | |
150 | ||
fb4650aa | 151 | } else if ((val = startswith(option, "keyfile-offset="))) { |
dc0a3555 | 152 | uint64_t off; |
880a599e | 153 | |
dc0a3555 | 154 | r = safe_atou64(val, &off); |
fb4650aa ZJS |
155 | if (r < 0) { |
156 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
880a599e TG |
157 | return 0; |
158 | } | |
159 | ||
dc0a3555 ZJS |
160 | if ((size_t) off != off) { |
161 | /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */ | |
162 | log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | arg_keyfile_offset = off; | |
167 | ||
fb4650aa ZJS |
168 | } else if ((val = startswith(option, "hash="))) { |
169 | r = free_and_strdup(&arg_hash, val); | |
170 | if (r < 0) | |
4b93637f | 171 | return log_oom(); |
7f4e0805 | 172 | |
fb4650aa | 173 | } else if ((val = startswith(option, "header="))) { |
b3b4ebab | 174 | arg_type = ANY_LUKS; |
7376e835 | 175 | |
baaa35ad ZJS |
176 | if (!path_is_absolute(val)) |
177 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
178 | "Header path \"%s\" is not absolute, refusing.", val); | |
7376e835 | 179 | |
baaa35ad ZJS |
180 | if (arg_header) |
181 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
182 | "Duplicate header= option, refusing."); | |
7376e835 | 183 | |
fb4650aa | 184 | arg_header = strdup(val); |
7376e835 AC |
185 | if (!arg_header) |
186 | return log_oom(); | |
187 | ||
fb4650aa | 188 | } else if ((val = startswith(option, "tries="))) { |
7f4e0805 | 189 | |
fb4650aa ZJS |
190 | r = safe_atou(val, &arg_tries); |
191 | if (r < 0) { | |
192 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
193 | return 0; |
194 | } | |
195 | ||
f75cac37 LP |
196 | } else if (STR_IN_SET(option, "readonly", "read-only")) |
197 | arg_readonly = true; | |
7f4e0805 | 198 | else if (streq(option, "verify")) |
f75cac37 LP |
199 | arg_verify = true; |
200 | else if (STR_IN_SET(option, "allow-discards", "discard")) | |
201 | arg_discards = true; | |
260ab287 | 202 | else if (streq(option, "luks")) |
b3b4ebab | 203 | arg_type = ANY_LUKS; |
8cf3ca80 | 204 | else if (streq(option, "tcrypt")) |
f75cac37 | 205 | arg_type = CRYPT_TCRYPT; |
8cf3ca80 | 206 | else if (streq(option, "tcrypt-hidden")) { |
f75cac37 LP |
207 | arg_type = CRYPT_TCRYPT; |
208 | arg_tcrypt_hidden = true; | |
8cf3ca80 | 209 | } else if (streq(option, "tcrypt-system")) { |
f75cac37 LP |
210 | arg_type = CRYPT_TCRYPT; |
211 | arg_tcrypt_system = true; | |
52028838 GH |
212 | } else if (streq(option, "tcrypt-veracrypt")) { |
213 | #ifdef CRYPT_TCRYPT_VERA_MODES | |
214 | arg_type = CRYPT_TCRYPT; | |
215 | arg_tcrypt_veracrypt = true; | |
216 | #else | |
baaa35ad ZJS |
217 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
218 | "This version of cryptsetup does not support tcrypt-veracrypt; refusing."); | |
52028838 | 219 | #endif |
f75cac37 LP |
220 | } else if (STR_IN_SET(option, "plain", "swap", "tmp")) |
221 | arg_type = CRYPT_PLAIN; | |
fb4650aa | 222 | else if ((val = startswith(option, "timeout="))) { |
7f4e0805 | 223 | |
0004f698 | 224 | r = parse_sec_fix_0(val, &arg_timeout); |
fb4650aa ZJS |
225 | if (r < 0) { |
226 | log_error_errno(r, "Failed to parse %s, ignoring: %m", option); | |
7f4e0805 LP |
227 | return 0; |
228 | } | |
229 | ||
fb4650aa | 230 | } else if ((val = startswith(option, "offset="))) { |
4eac2773 | 231 | |
fb4650aa ZJS |
232 | r = safe_atou64(val, &arg_offset); |
233 | if (r < 0) | |
234 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 235 | |
fb4650aa | 236 | } else if ((val = startswith(option, "skip="))) { |
4eac2773 | 237 | |
fb4650aa ZJS |
238 | r = safe_atou64(val, &arg_skip); |
239 | if (r < 0) | |
240 | return log_error_errno(r, "Failed to parse %s: %m", option); | |
4eac2773 | 241 | |
41e6f28a | 242 | } else if (!streq(option, "none")) |
fb4650aa | 243 | log_warning("Encountered unknown /etc/crypttab option '%s', ignoring.", option); |
7f4e0805 LP |
244 | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int parse_options(const char *options) { | |
a2a5291b | 249 | const char *word, *state; |
7f4e0805 | 250 | size_t l; |
74b1c371 | 251 | int r; |
7f4e0805 LP |
252 | |
253 | assert(options); | |
254 | ||
a2a5291b | 255 | FOREACH_WORD_SEPARATOR(word, l, options, ",", state) { |
74b1c371 | 256 | _cleanup_free_ char *o; |
7f4e0805 | 257 | |
a2a5291b | 258 | o = strndup(word, l); |
74b1c371 | 259 | if (!o) |
7f4e0805 | 260 | return -ENOMEM; |
7f4e0805 | 261 | r = parse_one_option(o); |
7f4e0805 LP |
262 | if (r < 0) |
263 | return r; | |
264 | } | |
265 | ||
4eac2773 MP |
266 | /* sanity-check options */ |
267 | if (arg_type != NULL && !streq(arg_type, CRYPT_PLAIN)) { | |
268 | if (arg_offset) | |
269 | log_warning("offset= ignored with type %s", arg_type); | |
270 | if (arg_skip) | |
271 | log_warning("skip= ignored with type %s", arg_type); | |
272 | } | |
273 | ||
7f4e0805 LP |
274 | return 0; |
275 | } | |
276 | ||
1ca208fb | 277 | static char* disk_description(const char *path) { |
f75cac37 | 278 | static const char name_fields[] = |
74b1c371 LP |
279 | "ID_PART_ENTRY_NAME\0" |
280 | "DM_NAME\0" | |
281 | "ID_MODEL_FROM_DATABASE\0" | |
f75cac37 | 282 | "ID_MODEL\0"; |
74b1c371 | 283 | |
4afd3348 | 284 | _cleanup_(sd_device_unrefp) sd_device *device = NULL; |
2c740afd | 285 | const char *i, *name; |
b1a2da0a | 286 | struct stat st; |
b1a2da0a LP |
287 | |
288 | assert(path); | |
289 | ||
290 | if (stat(path, &st) < 0) | |
291 | return NULL; | |
292 | ||
293 | if (!S_ISBLK(st.st_mode)) | |
294 | return NULL; | |
295 | ||
2c740afd | 296 | if (sd_device_new_from_devnum(&device, 'b', st.st_rdev) < 0) |
1ca208fb | 297 | return NULL; |
b1a2da0a | 298 | |
2c740afd YW |
299 | NULSTR_FOREACH(i, name_fields) |
300 | if (sd_device_get_property_value(device, i, &name) >= 0 && | |
301 | !isempty(name)) | |
1ca208fb | 302 | return strdup(name); |
b1a2da0a | 303 | |
1ca208fb | 304 | return NULL; |
b1a2da0a LP |
305 | } |
306 | ||
b61e476f | 307 | static char *disk_mount_point(const char *label) { |
e7d90b71 | 308 | _cleanup_free_ char *device = NULL; |
5862d652 | 309 | _cleanup_endmntent_ FILE *f = NULL; |
b61e476f LP |
310 | struct mntent *m; |
311 | ||
312 | /* Yeah, we don't support native systemd unit files here for now */ | |
313 | ||
314 | if (asprintf(&device, "/dev/mapper/%s", label) < 0) | |
5862d652 | 315 | return NULL; |
b61e476f | 316 | |
9ffcff0e | 317 | f = setmntent("/etc/fstab", "re"); |
e0295d26 | 318 | if (!f) |
5862d652 | 319 | return NULL; |
b61e476f LP |
320 | |
321 | while ((m = getmntent(f))) | |
5862d652 ZJS |
322 | if (path_equal(m->mnt_fsname, device)) |
323 | return strdup(m->mnt_dir); | |
b61e476f | 324 | |
5862d652 | 325 | return NULL; |
b61e476f LP |
326 | } |
327 | ||
1602b008 | 328 | static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) { |
ea7e7c1e | 329 | _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *text = NULL, *disk_path = NULL; |
ab84f5b9 | 330 | _cleanup_strv_free_erase_ char **passwords = NULL; |
e51b9486 | 331 | const char *name = NULL; |
e287086b LP |
332 | char **p, *id; |
333 | int r = 0; | |
e7d90b71 | 334 | |
e51b9486 HH |
335 | assert(vol); |
336 | assert(src); | |
1602b008 | 337 | assert(ret); |
e7d90b71 | 338 | |
e51b9486 HH |
339 | description = disk_description(src); |
340 | mount_point = disk_mount_point(vol); | |
341 | ||
ea7e7c1e MS |
342 | disk_path = cescape(src); |
343 | if (!disk_path) | |
344 | return log_oom(); | |
345 | ||
ece174c5 | 346 | if (description && streq(vol, description)) |
e51b9486 HH |
347 | /* If the description string is simply the |
348 | * volume name, then let's not show this | |
349 | * twice */ | |
97b11eed | 350 | description = mfree(description); |
e51b9486 HH |
351 | |
352 | if (mount_point && description) | |
353 | r = asprintf(&name_buffer, "%s (%s) on %s", description, vol, mount_point); | |
354 | else if (mount_point) | |
355 | r = asprintf(&name_buffer, "%s on %s", vol, mount_point); | |
356 | else if (description) | |
357 | r = asprintf(&name_buffer, "%s (%s)", description, vol); | |
358 | ||
359 | if (r < 0) | |
360 | return log_oom(); | |
361 | ||
362 | name = name_buffer ? name_buffer : vol; | |
363 | ||
a1c111c2 | 364 | if (asprintf(&text, "Please enter passphrase for disk %s:", name) < 0) |
e7d90b71 JJ |
365 | return log_oom(); |
366 | ||
ea7e7c1e | 367 | id = strjoina("cryptsetup:", disk_path); |
9fa1de96 | 368 | |
ab84f5b9 ZJS |
369 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, |
370 | ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED), | |
371 | &passwords); | |
23bbb0de MS |
372 | if (r < 0) |
373 | return log_error_errno(r, "Failed to query password: %m"); | |
e7d90b71 | 374 | |
f75cac37 | 375 | if (arg_verify) { |
ab84f5b9 ZJS |
376 | _cleanup_strv_free_erase_ char **passwords2 = NULL; |
377 | ||
1602b008 | 378 | assert(strv_length(passwords) == 1); |
e7d90b71 | 379 | |
a1c111c2 | 380 | if (asprintf(&text, "Please enter passphrase for disk %s (verification):", name) < 0) |
ab84f5b9 | 381 | return log_oom(); |
e7d90b71 | 382 | |
ea7e7c1e | 383 | id = strjoina("cryptsetup-verification:", disk_path); |
9fa1de96 | 384 | |
e287086b | 385 | r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2); |
ab84f5b9 ZJS |
386 | if (r < 0) |
387 | return log_error_errno(r, "Failed to query verification password: %m"); | |
e7d90b71 JJ |
388 | |
389 | assert(strv_length(passwords2) == 1); | |
390 | ||
1602b008 | 391 | if (!streq(passwords[0], passwords2[0])) { |
e7d90b71 | 392 | log_warning("Passwords did not match, retrying."); |
ab84f5b9 | 393 | return -EAGAIN; |
e7d90b71 JJ |
394 | } |
395 | } | |
396 | ||
1602b008 | 397 | strv_uniq(passwords); |
e7d90b71 | 398 | |
1602b008 | 399 | STRV_FOREACH(p, passwords) { |
e7d90b71 JJ |
400 | char *c; |
401 | ||
f75cac37 | 402 | if (strlen(*p)+1 >= arg_key_size) |
e7d90b71 JJ |
403 | continue; |
404 | ||
405 | /* Pad password if necessary */ | |
1602b008 | 406 | c = new(char, arg_key_size); |
ab84f5b9 ZJS |
407 | if (!c) |
408 | return log_oom(); | |
e7d90b71 | 409 | |
f75cac37 | 410 | strncpy(c, *p, arg_key_size); |
d135419e | 411 | free_and_replace(*p, c); |
e7d90b71 JJ |
412 | } |
413 | ||
ae2a15bc | 414 | *ret = TAKE_PTR(passwords); |
1602b008 | 415 | |
ab84f5b9 | 416 | return 0; |
e7d90b71 JJ |
417 | } |
418 | ||
1602b008 LP |
419 | static int attach_tcrypt( |
420 | struct crypt_device *cd, | |
421 | const char *name, | |
422 | const char *key_file, | |
423 | char **passwords, | |
424 | uint32_t flags) { | |
425 | ||
8cf3ca80 JJ |
426 | int r = 0; |
427 | _cleanup_free_ char *passphrase = NULL; | |
428 | struct crypt_params_tcrypt params = { | |
429 | .flags = CRYPT_TCRYPT_LEGACY_MODES, | |
f75cac37 LP |
430 | .keyfiles = (const char **)arg_tcrypt_keyfiles, |
431 | .keyfiles_count = strv_length(arg_tcrypt_keyfiles) | |
8cf3ca80 JJ |
432 | }; |
433 | ||
434 | assert(cd); | |
435 | assert(name); | |
f268f57f | 436 | assert(key_file || (passwords && passwords[0])); |
8cf3ca80 | 437 | |
f75cac37 | 438 | if (arg_tcrypt_hidden) |
8cf3ca80 JJ |
439 | params.flags |= CRYPT_TCRYPT_HIDDEN_HEADER; |
440 | ||
f75cac37 | 441 | if (arg_tcrypt_system) |
8cf3ca80 JJ |
442 | params.flags |= CRYPT_TCRYPT_SYSTEM_HEADER; |
443 | ||
52028838 GH |
444 | #ifdef CRYPT_TCRYPT_VERA_MODES |
445 | if (arg_tcrypt_veracrypt) | |
446 | params.flags |= CRYPT_TCRYPT_VERA_MODES; | |
447 | #endif | |
448 | ||
8cf3ca80 JJ |
449 | if (key_file) { |
450 | r = read_one_line_file(key_file, &passphrase); | |
451 | if (r < 0) { | |
da927ba9 | 452 | log_error_errno(r, "Failed to read password file '%s': %m", key_file); |
b7a0fead | 453 | return -EAGAIN; /* log with the actual error, but return EAGAIN */ |
8cf3ca80 JJ |
454 | } |
455 | ||
456 | params.passphrase = passphrase; | |
457 | } else | |
458 | params.passphrase = passwords[0]; | |
459 | params.passphrase_size = strlen(params.passphrase); | |
460 | ||
461 | r = crypt_load(cd, CRYPT_TCRYPT, ¶ms); | |
462 | if (r < 0) { | |
6f177c7d LP |
463 | if (key_file && r == -EPERM) { |
464 | log_error_errno(r, "Failed to activate using password file '%s'. (Key data not correct?)", key_file); | |
465 | return -EAGAIN; /* log the actual error, but return EAGAIN */ | |
466 | } | |
467 | ||
468 | return log_error_errno(r, "Failed to load tcrypt superblock on device %s: %m", crypt_get_device_name(cd)); | |
8cf3ca80 JJ |
469 | } |
470 | ||
6f177c7d LP |
471 | r = crypt_activate_by_volume_key(cd, name, NULL, 0, flags); |
472 | if (r < 0) | |
473 | return log_error_errno(r, "Failed to activate tcrypt device %s: %m", crypt_get_device_name(cd)); | |
474 | ||
475 | return 0; | |
8cf3ca80 JJ |
476 | } |
477 | ||
10fb4e35 JJ |
478 | static int attach_luks_or_plain(struct crypt_device *cd, |
479 | const char *name, | |
480 | const char *key_file, | |
7376e835 | 481 | const char *data_device, |
10fb4e35 JJ |
482 | char **passwords, |
483 | uint32_t flags) { | |
484 | int r = 0; | |
485 | bool pass_volume_key = false; | |
486 | ||
487 | assert(cd); | |
488 | assert(name); | |
489 | assert(key_file || passwords); | |
490 | ||
b3b4ebab OK |
491 | if (!arg_type || STR_IN_SET(arg_type, ANY_LUKS, CRYPT_LUKS1)) { |
492 | r = crypt_load(cd, CRYPT_LUKS, NULL); | |
0ffff81a | 493 | if (r < 0) |
6f177c7d | 494 | return log_error_errno(r, "Failed to load LUKS superblock on device %s: %m", crypt_get_device_name(cd)); |
7376e835 AC |
495 | |
496 | if (data_device) | |
497 | r = crypt_set_data_device(cd, data_device); | |
498 | } | |
10fb4e35 | 499 | |
f75cac37 | 500 | if ((!arg_type && r < 0) || streq_ptr(arg_type, CRYPT_PLAIN)) { |
4eac2773 MP |
501 | struct crypt_params_plain params = { |
502 | .offset = arg_offset, | |
503 | .skip = arg_skip, | |
a9fc6406 DJL |
504 | #if HAVE_LIBCRYPTSETUP_SECTOR_SIZE |
505 | .sector_size = arg_sector_size, | |
506 | #endif | |
4eac2773 | 507 | }; |
10fb4e35 JJ |
508 | const char *cipher, *cipher_mode; |
509 | _cleanup_free_ char *truncated_cipher = NULL; | |
510 | ||
f75cac37 | 511 | if (arg_hash) { |
10fb4e35 | 512 | /* plain isn't a real hash type. it just means "use no hash" */ |
f75cac37 LP |
513 | if (!streq(arg_hash, "plain")) |
514 | params.hash = arg_hash; | |
8a52210c ZJS |
515 | } else if (!key_file) |
516 | /* for CRYPT_PLAIN, the behaviour of cryptsetup | |
517 | * package is to not hash when a key file is provided */ | |
10fb4e35 JJ |
518 | params.hash = "ripemd160"; |
519 | ||
f75cac37 | 520 | if (arg_cipher) { |
10fb4e35 JJ |
521 | size_t l; |
522 | ||
f75cac37 LP |
523 | l = strcspn(arg_cipher, "-"); |
524 | truncated_cipher = strndup(arg_cipher, l); | |
10fb4e35 JJ |
525 | if (!truncated_cipher) |
526 | return log_oom(); | |
527 | ||
528 | cipher = truncated_cipher; | |
f75cac37 | 529 | cipher_mode = arg_cipher[l] ? arg_cipher+l+1 : "plain"; |
10fb4e35 JJ |
530 | } else { |
531 | cipher = "aes"; | |
532 | cipher_mode = "cbc-essiv:sha256"; | |
533 | } | |
534 | ||
aed68083 | 535 | /* for CRYPT_PLAIN limit reads from keyfile to key length, and ignore keyfile-size */ |
6131a78b | 536 | arg_keyfile_size = arg_key_size; |
10fb4e35 | 537 | |
aed68083 LP |
538 | /* In contrast to what the name crypt_setup() might suggest this doesn't actually format |
539 | * anything, it just configures encryption parameters when used for plain mode. */ | |
1602b008 | 540 | r = crypt_format(cd, CRYPT_PLAIN, cipher, cipher_mode, NULL, NULL, arg_keyfile_size, ¶ms); |
10fb4e35 JJ |
541 | |
542 | /* hash == NULL implies the user passed "plain" */ | |
543 | pass_volume_key = (params.hash == NULL); | |
544 | } | |
23bbb0de MS |
545 | if (r < 0) |
546 | return log_error_errno(r, "Loading of cryptographic parameters failed: %m"); | |
10fb4e35 JJ |
547 | |
548 | log_info("Set cipher %s, mode %s, key size %i bits for device %s.", | |
549 | crypt_get_cipher(cd), | |
550 | crypt_get_cipher_mode(cd), | |
551 | crypt_get_volume_key_size(cd)*8, | |
552 | crypt_get_device_name(cd)); | |
553 | ||
554 | if (key_file) { | |
1602b008 | 555 | r = crypt_activate_by_keyfile_offset(cd, name, arg_key_slot, key_file, arg_keyfile_size, arg_keyfile_offset, flags); |
6f177c7d LP |
556 | if (r == -EPERM) { |
557 | log_error_errno(r, "Failed to activate with key file '%s'. (Key data incorrect?)", key_file); | |
558 | return -EAGAIN; /* Log actual error, but return EAGAIN */ | |
c20db388 RG |
559 | } |
560 | if (r == -EINVAL) { | |
561 | log_error_errno(r, "Failed to activate with key file '%s'. (Key file missing?)", key_file); | |
562 | return -EAGAIN; /* Log actual error, but return EAGAIN */ | |
10fb4e35 | 563 | } |
6f177c7d LP |
564 | if (r < 0) |
565 | return log_error_errno(r, "Failed to activate with key file '%s': %m", key_file); | |
10fb4e35 JJ |
566 | } else { |
567 | char **p; | |
568 | ||
6f177c7d | 569 | r = -EINVAL; |
10fb4e35 JJ |
570 | STRV_FOREACH(p, passwords) { |
571 | if (pass_volume_key) | |
f75cac37 | 572 | r = crypt_activate_by_volume_key(cd, name, *p, arg_key_size, flags); |
10fb4e35 | 573 | else |
f75cac37 | 574 | r = crypt_activate_by_passphrase(cd, name, arg_key_slot, *p, strlen(*p), flags); |
10fb4e35 JJ |
575 | if (r >= 0) |
576 | break; | |
577 | } | |
6f177c7d LP |
578 | if (r == -EPERM) { |
579 | log_error_errno(r, "Failed to activate with specified passphrase. (Passphrase incorrect?)"); | |
580 | return -EAGAIN; /* log actual error, but return EAGAIN */ | |
581 | } | |
582 | if (r < 0) | |
583 | return log_error_errno(r, "Failed to activate with specified passphrase: %m"); | |
10fb4e35 JJ |
584 | } |
585 | ||
586 | return r; | |
587 | } | |
588 | ||
dd5e696d | 589 | static int help(void) { |
37ec0fdd LP |
590 | _cleanup_free_ char *link = NULL; |
591 | int r; | |
592 | ||
593 | r = terminal_urlify_man("systemd-cryptsetup@.service", "8", &link); | |
594 | if (r < 0) | |
595 | return log_oom(); | |
dd5e696d LP |
596 | |
597 | printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n" | |
598 | "%s detach VOLUME\n\n" | |
37ec0fdd LP |
599 | "Attaches or detaches an encrypted block device.\n" |
600 | "\nSee the %s for details.\n" | |
601 | , program_invocation_short_name | |
602 | , program_invocation_short_name | |
603 | , link | |
604 | ); | |
dd5e696d LP |
605 | |
606 | return 0; | |
607 | } | |
608 | ||
3a40f366 | 609 | static int run(int argc, char *argv[]) { |
294bd454 | 610 | _cleanup_(crypt_freep) struct crypt_device *cd = NULL; |
3a40f366 | 611 | int r; |
e23a0ce8 | 612 | |
3a40f366 YW |
613 | if (argc <= 1) |
614 | return help(); | |
dd5e696d | 615 | |
e23a0ce8 LP |
616 | if (argc < 3) { |
617 | log_error("This program requires at least two arguments."); | |
3a40f366 | 618 | return -EINVAL; |
e23a0ce8 LP |
619 | } |
620 | ||
6bf3c61c | 621 | log_setup_service(); |
e23a0ce8 | 622 | |
4c12626c LP |
623 | umask(0022); |
624 | ||
260ab287 | 625 | if (streq(argv[1], "attach")) { |
7f4e0805 | 626 | uint32_t flags = 0; |
10fb4e35 | 627 | unsigned tries; |
260ab287 | 628 | usec_t until; |
e2d480b9 | 629 | crypt_status_info status; |
e51b9486 | 630 | const char *key_file = NULL; |
7f4e0805 | 631 | |
b61e476f LP |
632 | /* Arguments: systemd-cryptsetup attach VOLUME SOURCE-DEVICE [PASSWORD] [OPTIONS] */ |
633 | ||
0ffff81a LP |
634 | if (argc < 4) |
635 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "attach requires at least two arguments."); | |
7f4e0805 | 636 | |
1fc76335 LP |
637 | if (argc >= 5 && |
638 | argv[4][0] && | |
639 | !streq(argv[4], "-") && | |
640 | !streq(argv[4], "none")) { | |
7f4e0805 LP |
641 | |
642 | if (!path_is_absolute(argv[4])) | |
44ce4255 | 643 | log_warning("Password file path '%s' is not absolute. Ignoring.", argv[4]); |
7f4e0805 LP |
644 | else |
645 | key_file = argv[4]; | |
646 | } | |
647 | ||
74b1c371 | 648 | if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) { |
3a40f366 YW |
649 | r = parse_options(argv[5]); |
650 | if (r < 0) | |
651 | return r; | |
74b1c371 | 652 | } |
e23a0ce8 | 653 | |
b853f6e9 LP |
654 | /* A delicious drop of snake oil */ |
655 | mlockall(MCL_FUTURE); | |
656 | ||
7376e835 AC |
657 | if (arg_header) { |
658 | log_debug("LUKS header: %s", arg_header); | |
5f4bfe56 | 659 | r = crypt_init(&cd, arg_header); |
7376e835 | 660 | } else |
5f4bfe56 | 661 | r = crypt_init(&cd, argv[3]); |
3a40f366 YW |
662 | if (r < 0) |
663 | return log_error_errno(r, "crypt_init() failed: %m"); | |
e23a0ce8 | 664 | |
691c2e2e | 665 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 666 | |
260ab287 | 667 | status = crypt_status(cd, argv[2]); |
3742095b | 668 | if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) { |
260ab287 | 669 | log_info("Volume %s already active.", argv[2]); |
3a40f366 | 670 | return 0; |
7f4e0805 LP |
671 | } |
672 | ||
f75cac37 | 673 | if (arg_readonly) |
7f4e0805 LP |
674 | flags |= CRYPT_ACTIVATE_READONLY; |
675 | ||
f75cac37 | 676 | if (arg_discards) |
2a2aab60 MM |
677 | flags |= CRYPT_ACTIVATE_ALLOW_DISCARDS; |
678 | ||
0864d311 | 679 | if (arg_timeout == USEC_INFINITY) |
7dcda352 | 680 | until = 0; |
0864d311 AS |
681 | else |
682 | until = now(CLOCK_MONOTONIC) + arg_timeout; | |
260ab287 | 683 | |
6131a78b | 684 | arg_key_size = (arg_key_size > 0 ? arg_key_size : (256 / 8)); |
e2d480b9 | 685 | |
10fb4e35 JJ |
686 | if (key_file) { |
687 | struct stat st; | |
e2d480b9 | 688 | |
10fb4e35 JJ |
689 | /* Ideally we'd do this on the open fd, but since this is just a |
690 | * warning it's OK to do this in two steps. */ | |
3f4d56a0 MP |
691 | if (stat(key_file, &st) >= 0 && S_ISREG(st.st_mode) && (st.st_mode & 0005)) |
692 | log_warning("Key file %s is world-readable. This is not a good idea!", key_file); | |
e2d480b9 LP |
693 | } |
694 | ||
f75cac37 | 695 | for (tries = 0; arg_tries == 0 || tries < arg_tries; tries++) { |
ab84f5b9 | 696 | _cleanup_strv_free_erase_ char **passwords = NULL; |
260ab287 LP |
697 | |
698 | if (!key_file) { | |
5f4bfe56 LP |
699 | r = get_password(argv[2], argv[3], until, tries == 0 && !arg_verify, &passwords); |
700 | if (r == -EAGAIN) | |
e7d90b71 | 701 | continue; |
5f4bfe56 | 702 | if (r < 0) |
3a40f366 | 703 | return r; |
260ab287 LP |
704 | } |
705 | ||
f75cac37 | 706 | if (streq_ptr(arg_type, CRYPT_TCRYPT)) |
5f4bfe56 | 707 | r = attach_tcrypt(cd, argv[2], key_file, passwords, flags); |
8cf3ca80 | 708 | else |
5f4bfe56 | 709 | r = attach_luks_or_plain(cd, |
7376e835 AC |
710 | argv[2], |
711 | key_file, | |
712 | arg_header ? argv[3] : NULL, | |
713 | passwords, | |
714 | flags); | |
5f4bfe56 | 715 | if (r >= 0) |
260ab287 | 716 | break; |
6f177c7d LP |
717 | if (r != -EAGAIN) |
718 | return r; | |
260ab287 | 719 | |
6f177c7d LP |
720 | /* Passphrase not correct? Let's try again! */ |
721 | key_file = NULL; | |
7f4e0805 LP |
722 | } |
723 | ||
0ffff81a LP |
724 | if (arg_tries != 0 && tries >= arg_tries) |
725 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Too many attempts to activate; giving up."); | |
7f4e0805 LP |
726 | |
727 | } else if (streq(argv[1], "detach")) { | |
7f4e0805 | 728 | |
5f4bfe56 LP |
729 | r = crypt_init_by_name(&cd, argv[2]); |
730 | if (r == -ENODEV) { | |
a0bfc9c2 | 731 | log_info("Volume %s already inactive.", argv[2]); |
3a40f366 | 732 | return 0; |
7f4e0805 | 733 | } |
3a40f366 YW |
734 | if (r < 0) |
735 | return log_error_errno(r, "crypt_init_by_name() failed: %m"); | |
7f4e0805 | 736 | |
691c2e2e | 737 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
7f4e0805 | 738 | |
5f4bfe56 | 739 | r = crypt_deactivate(cd, argv[2]); |
3a40f366 YW |
740 | if (r < 0) |
741 | return log_error_errno(r, "Failed to deactivate: %m"); | |
e23a0ce8 | 742 | |
0ffff81a LP |
743 | } else |
744 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb %s.", argv[1]); | |
e23a0ce8 | 745 | |
3a40f366 | 746 | return 0; |
e23a0ce8 | 747 | } |
3a40f366 YW |
748 | |
749 | DEFINE_MAIN_FUNCTION(run); |