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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
70a5db58 LP |
2 | |
3 | #include <stddef.h> | |
4 | #include <sys/mount.h> | |
5 | ||
b25a930f | 6 | #include "blockdev-util.h" |
70a5db58 LP |
7 | #include "chown-recursive.h" |
8 | #include "copy.h" | |
9 | #include "fd-util.h" | |
10 | #include "fileio.h" | |
7c604e89 | 11 | #include "filesystems.h" |
1dfe5de0 | 12 | #include "fs-util.h" |
70a5db58 LP |
13 | #include "home-util.h" |
14 | #include "homework-cifs.h" | |
15 | #include "homework-directory.h" | |
7b78db28 | 16 | #include "homework-fido2.h" |
70a5db58 LP |
17 | #include "homework-fscrypt.h" |
18 | #include "homework-luks.h" | |
19 | #include "homework-mount.h" | |
20 | #include "homework-pkcs11.h" | |
21 | #include "homework.h" | |
0e98d17e | 22 | #include "libcrypt-util.h" |
70a5db58 LP |
23 | #include "main-func.h" |
24 | #include "memory-util.h" | |
25 | #include "missing_magic.h" | |
26 | #include "mount-util.h" | |
27 | #include "path-util.h" | |
73d874ba | 28 | #include "recovery-key.h" |
70a5db58 LP |
29 | #include "rm-rf.h" |
30 | #include "stat-util.h" | |
31 | #include "strv.h" | |
86019efa | 32 | #include "sync-util.h" |
70a5db58 LP |
33 | #include "tmpfile-util.h" |
34 | #include "user-util.h" | |
35 | #include "virt.h" | |
36 | ||
37 | /* Make sure a bad password always results in a 3s delay, no matter what */ | |
38 | #define BAD_PASSWORD_DELAY_USEC (3 * USEC_PER_SEC) | |
39 | ||
40 | int user_record_authenticate( | |
41 | UserRecord *h, | |
42 | UserRecord *secret, | |
7b78db28 | 43 | PasswordCache *cache, |
c8f145ad | 44 | bool strict_verify) { |
70a5db58 | 45 | |
17e7561a LP |
46 | bool need_password = false, need_recovery_key = false, need_token = false, need_pin = false, |
47 | need_protected_authentication_path_permitted = false, need_user_presence_permitted = false, | |
48 | need_user_verification_permitted = false, pin_locked = false, pin_incorrect = false, | |
49 | pin_incorrect_few_tries_left = false, pin_incorrect_one_try_left = false, token_action_timeout = false; | |
70a5db58 LP |
50 | int r; |
51 | ||
52 | assert(h); | |
53 | assert(secret); | |
54 | ||
55 | /* Tries to authenticate a user record with the supplied secrets. i.e. checks whether at least one | |
56 | * supplied plaintext passwords matches a hashed password field of the user record. Or if a | |
7b78db28 | 57 | * configured PKCS#11 or FIDO2 token is around and can unlock the record. |
70a5db58 | 58 | * |
7b78db28 LP |
59 | * Note that the 'cache' parameter is both an input and output parameter: it contains lists of |
60 | * configured, decrypted PKCS#11/FIDO2 passwords. We typically have to call this function multiple | |
61 | * times over the course of an operation (think: on login we authenticate the host user record, the | |
62 | * record embedded in the LUKS record and the one embedded in $HOME). Hence we keep a list of | |
63 | * passwords we already decrypted, so that we don't have to do the (slow and potentially interactive) | |
64 | * PKCS#11/FIDO2 dance for the relevant token again and again. */ | |
70a5db58 LP |
65 | |
66 | /* First, let's see if the supplied plain-text passwords work? */ | |
87d7893c LP |
67 | r = user_record_test_password(h, secret); |
68 | if (r == -ENOKEY) | |
70a5db58 | 69 | need_password = true; |
87d7893c | 70 | else if (r == -ENXIO) |
70a5db58 LP |
71 | log_debug_errno(r, "User record has no hashed passwords, plaintext passwords not tested."); |
72 | else if (r < 0) | |
73 | return log_error_errno(r, "Failed to validate password of record: %m"); | |
74 | else { | |
75 | log_info("Provided password unlocks user record."); | |
c8f145ad | 76 | return 1; |
70a5db58 LP |
77 | } |
78 | ||
87d7893c LP |
79 | /* Similar, but test against the recovery keys */ |
80 | r = user_record_test_recovery_key(h, secret); | |
81 | if (r == -ENOKEY) | |
82 | need_recovery_key = true; | |
83 | else if (r == -ENXIO) | |
84 | log_debug_errno(r, "User record has no recovery keys, plaintext passwords not tested against it."); | |
85 | else if (r < 0) | |
86 | return log_error_errno(r, "Failed to validate the recovery key of the record: %m"); | |
87 | else { | |
88 | log_info("Provided password is a recovery key that unlocks the user record."); | |
89 | return 1; | |
90 | } | |
91 | ||
92 | if (need_password && need_recovery_key) | |
93 | log_info("None of the supplied plaintext passwords unlock the user record's hashed passwords or recovery keys."); | |
94 | else if (need_password) | |
95 | log_info("None of the supplied plaintext passwords unlock the user record's hashed passwords."); | |
96 | else | |
97 | log_info("None of the supplied plaintext passwords unlock the user record's hashed recovery keys."); | |
98 | ||
7b78db28 | 99 | /* Second, test cached PKCS#11 passwords */ |
de010b0b | 100 | for (size_t n = 0; n < h->n_pkcs11_encrypted_key; n++) |
7b78db28 LP |
101 | STRV_FOREACH(pp, cache->pkcs11_passwords) { |
102 | r = test_password_one(h->pkcs11_encrypted_key[n].hashed_password, *pp); | |
70a5db58 LP |
103 | if (r < 0) |
104 | return log_error_errno(r, "Failed to check supplied PKCS#11 password: %m"); | |
105 | if (r > 0) { | |
106 | log_info("Previously acquired PKCS#11 password unlocks user record."); | |
c8f145ad | 107 | return 1; |
70a5db58 LP |
108 | } |
109 | } | |
7b78db28 LP |
110 | |
111 | /* Third, test cached FIDO2 passwords */ | |
de010b0b | 112 | for (size_t n = 0; n < h->n_fido2_hmac_salt; n++) |
7b78db28 LP |
113 | /* See if any of the previously calculated passwords work */ |
114 | STRV_FOREACH(pp, cache->fido2_passwords) { | |
115 | r = test_password_one(h->fido2_hmac_salt[n].hashed_password, *pp); | |
116 | if (r < 0) | |
117 | return log_error_errno(r, "Failed to check supplied FIDO2 password: %m"); | |
118 | if (r > 0) { | |
119 | log_info("Previously acquired FIDO2 password unlocks user record."); | |
e4961427 | 120 | return 1; |
7b78db28 LP |
121 | } |
122 | } | |
7b78db28 LP |
123 | |
124 | /* Fourth, let's see if any of the PKCS#11 security tokens are plugged in and help us */ | |
125 | for (size_t n = 0; n < h->n_pkcs11_encrypted_key; n++) { | |
126 | #if HAVE_P11KIT | |
127 | _cleanup_(pkcs11_callback_data_release) struct pkcs11_callback_data data = { | |
128 | .user_record = h, | |
129 | .secret = secret, | |
130 | .encrypted_key = h->pkcs11_encrypted_key + n, | |
131 | }; | |
70a5db58 LP |
132 | |
133 | r = pkcs11_find_token(data.encrypted_key->uri, pkcs11_callback, &data); | |
134 | switch (r) { | |
135 | case -EAGAIN: | |
136 | need_token = true; | |
137 | break; | |
138 | case -ENOANO: | |
139 | need_pin = true; | |
140 | break; | |
141 | case -ERFKILL: | |
142 | need_protected_authentication_path_permitted = true; | |
143 | break; | |
144 | case -EOWNERDEAD: | |
145 | pin_locked = true; | |
146 | break; | |
147 | case -ENOLCK: | |
148 | pin_incorrect = true; | |
149 | break; | |
150 | case -ETOOMANYREFS: | |
151 | pin_incorrect = pin_incorrect_few_tries_left = true; | |
152 | break; | |
153 | case -EUCLEAN: | |
154 | pin_incorrect = pin_incorrect_few_tries_left = pin_incorrect_one_try_left = true; | |
155 | break; | |
156 | default: | |
157 | if (r < 0) | |
158 | return r; | |
159 | ||
160 | r = test_password_one(data.encrypted_key->hashed_password, data.decrypted_password); | |
161 | if (r < 0) | |
162 | return log_error_errno(r, "Failed to test PKCS#11 password: %m"); | |
163 | if (r == 0) | |
164 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Configured PKCS#11 security token %s does not decrypt encrypted key correctly.", data.encrypted_key->uri); | |
165 | ||
166 | log_info("Decrypted password from PKCS#11 security token %s unlocks user record.", data.encrypted_key->uri); | |
167 | ||
7b78db28 LP |
168 | r = strv_extend(&cache->pkcs11_passwords, data.decrypted_password); |
169 | if (r < 0) | |
170 | return log_oom(); | |
171 | ||
e4961427 | 172 | return 1; |
7b78db28 LP |
173 | } |
174 | #else | |
175 | need_token = true; | |
176 | break; | |
177 | #endif | |
178 | } | |
179 | ||
180 | /* Fifth, let's see if any of the FIDO2 security tokens are plugged in and help us */ | |
181 | for (size_t n = 0; n < h->n_fido2_hmac_salt; n++) { | |
182 | #if HAVE_LIBFIDO2 | |
183 | _cleanup_(erase_and_freep) char *decrypted_password = NULL; | |
184 | ||
185 | r = fido2_use_token(h, secret, h->fido2_hmac_salt + n, &decrypted_password); | |
186 | switch (r) { | |
187 | case -EAGAIN: | |
188 | need_token = true; | |
189 | break; | |
190 | case -ENOANO: | |
191 | need_pin = true; | |
192 | break; | |
193 | case -EOWNERDEAD: | |
194 | pin_locked = true; | |
195 | break; | |
196 | case -ENOLCK: | |
197 | pin_incorrect = true; | |
198 | break; | |
199 | case -EMEDIUMTYPE: | |
200 | need_user_presence_permitted = true; | |
201 | break; | |
17e7561a LP |
202 | case -ENOCSI: |
203 | need_user_verification_permitted = true; | |
204 | break; | |
7b78db28 LP |
205 | case -ENOSTR: |
206 | token_action_timeout = true; | |
207 | break; | |
208 | default: | |
209 | if (r < 0) | |
210 | return r; | |
211 | ||
212 | r = test_password_one(h->fido2_hmac_salt[n].hashed_password, decrypted_password); | |
213 | if (r < 0) | |
214 | return log_error_errno(r, "Failed to test FIDO2 password: %m"); | |
215 | if (r == 0) | |
216 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Configured FIDO2 security token does not decrypt encrypted key correctly."); | |
217 | ||
218 | log_info("Decrypted password from FIDO2 security token unlocks user record."); | |
219 | ||
220 | r = strv_extend(&cache->fido2_passwords, decrypted_password); | |
70a5db58 LP |
221 | if (r < 0) |
222 | return log_oom(); | |
223 | ||
c8f145ad | 224 | return 1; |
70a5db58 LP |
225 | } |
226 | #else | |
227 | need_token = true; | |
228 | break; | |
229 | #endif | |
230 | } | |
231 | ||
232 | /* Ordered by "relevance", i.e. the most "important" or "interesting" error condition is returned. */ | |
233 | if (pin_incorrect_one_try_left) | |
234 | return -EUCLEAN; | |
235 | if (pin_incorrect_few_tries_left) | |
236 | return -ETOOMANYREFS; | |
237 | if (pin_incorrect) | |
238 | return -ENOLCK; | |
239 | if (pin_locked) | |
240 | return -EOWNERDEAD; | |
7b78db28 LP |
241 | if (token_action_timeout) |
242 | return -ENOSTR; | |
70a5db58 LP |
243 | if (need_protected_authentication_path_permitted) |
244 | return -ERFKILL; | |
7b78db28 LP |
245 | if (need_user_presence_permitted) |
246 | return -EMEDIUMTYPE; | |
17e7561a LP |
247 | if (need_user_verification_permitted) |
248 | return -ENOCSI; | |
70a5db58 LP |
249 | if (need_pin) |
250 | return -ENOANO; | |
251 | if (need_token) | |
252 | return -EBADSLT; | |
253 | if (need_password) | |
254 | return -ENOKEY; | |
87d7893c LP |
255 | if (need_recovery_key) |
256 | return -EREMOTEIO; | |
70a5db58 | 257 | |
87d7893c LP |
258 | /* Hmm, this means neither PCKS#11/FIDO2 nor classic hashed passwords or recovery keys were supplied, |
259 | * we cannot authenticate this reasonably */ | |
c8f145ad LP |
260 | if (strict_verify) |
261 | return log_debug_errno(SYNTHETIC_ERRNO(EKEYREVOKED), | |
87d7893c | 262 | "No hashed passwords, no recovery keys and no PKCS#11/FIDO2 tokens defined, cannot authenticate user record, refusing."); |
c8f145ad LP |
263 | |
264 | /* If strict verification is off this means we are possibly in the case where we encountered an | |
265 | * unfixated record, i.e. a synthetic one that accordingly lacks any authentication data. In this | |
266 | * case, allow the authentication to pass for now, so that the second (or third) authentication level | |
267 | * (the ones of the user record in the LUKS header or inside the home directory) will then catch | |
268 | * invalid passwords. The second/third authentication always runs in strict verification mode. */ | |
87d7893c | 269 | log_debug("No hashed passwords, not recovery keys and no PKCS#11 tokens defined in record, cannot authenticate user record. " |
c8f145ad LP |
270 | "Deferring to embedded user record."); |
271 | return 0; | |
70a5db58 LP |
272 | } |
273 | ||
86019efa LP |
274 | static void drop_caches_now(void) { |
275 | int r; | |
276 | ||
0e685823 | 277 | /* Drop file system caches now. See https://docs.kernel.org/admin-guide/sysctl/vm.html |
2f8211c6 ZJS |
278 | * for details. We write "2" into /proc/sys/vm/drop_caches to ensure dentries/inodes are flushed, but |
279 | * not more. */ | |
86019efa LP |
280 | |
281 | r = write_string_file("/proc/sys/vm/drop_caches", "2\n", WRITE_STRING_FILE_DISABLE_BUFFER); | |
282 | if (r < 0) | |
283 | log_warning_errno(r, "Failed to drop caches, ignoring: %m"); | |
284 | else | |
285 | log_debug("Dropped caches."); | |
286 | } | |
287 | ||
55166094 LP |
288 | int home_setup_undo_mount(HomeSetup *setup, int level) { |
289 | int r; | |
290 | ||
291 | assert(setup); | |
292 | ||
293 | if (!setup->undo_mount) | |
294 | return 0; | |
295 | ||
1147c538 LP |
296 | r = umount_recursive(HOME_RUNTIME_WORK_DIR, 0); |
297 | if (r < 0) { | |
298 | if (level >= LOG_DEBUG) /* umount_recursive() does debug level logging anyway, no need to | |
299 | * repeat that here */ | |
300 | return r; | |
301 | ||
a6f44d61 | 302 | /* If a higher log level is requested, the generate a non-debug message here too. */ |
1147c538 LP |
303 | return log_full_errno(level, r, "Failed to unmount mount tree below %s: %m", HOME_RUNTIME_WORK_DIR); |
304 | } | |
55166094 LP |
305 | |
306 | setup->undo_mount = false; | |
307 | return 1; | |
308 | } | |
309 | ||
f7800049 LP |
310 | int home_setup_undo_dm(HomeSetup *setup, int level) { |
311 | int r, ret; | |
312 | ||
313 | assert(setup); | |
314 | ||
315 | if (setup->undo_dm) { | |
316 | assert(setup->crypt_device); | |
317 | assert(setup->dm_name); | |
318 | ||
319 | r = sym_crypt_deactivate_by_name(setup->crypt_device, setup->dm_name, 0); | |
320 | if (r < 0) | |
321 | return log_full_errno(level, r, "Failed to deactivate LUKS device: %m"); | |
322 | ||
491347bd LP |
323 | /* In case the device was already remove asynchronously by an early unmount via the deferred |
324 | * remove logic, let's wait for it */ | |
325 | (void) wait_for_block_device_gone(setup, USEC_PER_SEC * 30); | |
326 | ||
f7800049 LP |
327 | setup->undo_dm = false; |
328 | ret = 1; | |
329 | } else | |
330 | ret = 0; | |
331 | ||
332 | if (setup->crypt_device) { | |
333 | sym_crypt_free(setup->crypt_device); | |
334 | setup->crypt_device = NULL; | |
335 | } | |
336 | ||
337 | return ret; | |
338 | } | |
339 | ||
d26cdde3 LP |
340 | int keyring_unlink(key_serial_t k) { |
341 | ||
342 | if (k == -1) /* already invalidated? */ | |
343 | return -1; | |
344 | ||
345 | if (keyctl(KEYCTL_UNLINK, k, KEY_SPEC_SESSION_KEYRING, 0, 0) < 0) | |
346 | log_debug_errno(errno, "Failed to unlink key from session kernel keyring, ignoring: %m"); | |
347 | ||
348 | return -1; /* Always return the key_serial_t value for "invalid" */ | |
349 | } | |
350 | ||
351 | static int keyring_flush(UserRecord *h) { | |
352 | _cleanup_free_ char *name = NULL; | |
353 | long serial; | |
354 | ||
355 | assert(h); | |
356 | ||
357 | name = strjoin("homework-user-", h->user_name); | |
358 | if (!name) | |
359 | return log_oom(); | |
360 | ||
361 | serial = keyctl(KEYCTL_SEARCH, (unsigned long) KEY_SPEC_SESSION_KEYRING, (unsigned long) "user", (unsigned long) name, 0); | |
362 | if (serial == -1) | |
363 | return log_debug_errno(errno, "Failed to find kernel keyring entry for user, ignoring: %m"); | |
364 | ||
365 | return keyring_unlink(serial); | |
366 | } | |
367 | ||
66aa51f8 | 368 | int home_setup_done(HomeSetup *setup) { |
70a5db58 LP |
369 | int r = 0, q; |
370 | ||
371 | assert(setup); | |
372 | ||
28a7f106 LP |
373 | if (setup->root_fd >= 0) { |
374 | if (setup->do_offline_fitrim) { | |
375 | q = run_fitrim(setup->root_fd); | |
376 | if (q < 0) | |
377 | r = q; | |
378 | } | |
379 | ||
86019efa LP |
380 | if (syncfs(setup->root_fd) < 0) |
381 | log_debug_errno(errno, "Failed to synchronize home directory, ignoring: %m"); | |
382 | ||
28a7f106 LP |
383 | setup->root_fd = safe_close(setup->root_fd); |
384 | } | |
70a5db58 | 385 | |
55166094 LP |
386 | q = home_setup_undo_mount(setup, LOG_DEBUG); |
387 | if (q < 0) | |
388 | r = q; | |
70a5db58 | 389 | |
f7800049 LP |
390 | q = home_setup_undo_dm(setup, LOG_DEBUG); |
391 | if (q < 0) | |
392 | r = q; | |
70a5db58 | 393 | |
28a7f106 LP |
394 | if (setup->image_fd >= 0) { |
395 | if (setup->do_offline_fallocate) { | |
396 | q = run_fallocate(setup->image_fd, NULL); | |
397 | if (q < 0) | |
398 | r = q; | |
399 | } | |
400 | ||
565ac8b1 LP |
401 | if (setup->do_mark_clean) { |
402 | q = run_mark_dirty(setup->image_fd, false); | |
403 | if (q < 0) | |
404 | r = q; | |
405 | } | |
406 | ||
28a7f106 LP |
407 | setup->image_fd = safe_close(setup->image_fd); |
408 | } | |
409 | ||
32dda527 LP |
410 | if (setup->temporary_image_path) { |
411 | if (unlink(setup->temporary_image_path) < 0) | |
412 | log_debug_errno(errno, "Failed to remove temporary image file '%s', ignoring: %m", | |
413 | setup->temporary_image_path); | |
414 | ||
415 | setup->temporary_image_path = mfree(setup->temporary_image_path); | |
416 | } | |
417 | ||
d26cdde3 LP |
418 | setup->key_serial = keyring_unlink(setup->key_serial); |
419 | ||
70a5db58 LP |
420 | setup->undo_mount = false; |
421 | setup->undo_dm = false; | |
28a7f106 LP |
422 | setup->do_offline_fitrim = false; |
423 | setup->do_offline_fallocate = false; | |
565ac8b1 | 424 | setup->do_mark_clean = false; |
70a5db58 LP |
425 | |
426 | setup->dm_name = mfree(setup->dm_name); | |
427 | setup->dm_node = mfree(setup->dm_node); | |
428 | ||
429 | setup->loop = loop_device_unref(setup->loop); | |
70a5db58 | 430 | |
fc4941d6 | 431 | setup->volume_key = erase_and_free(setup->volume_key); |
70a5db58 LP |
432 | setup->volume_key_size = 0; |
433 | ||
86019efa LP |
434 | if (setup->do_drop_caches) |
435 | drop_caches_now(); | |
436 | ||
bf15879b LP |
437 | setup->mount_suffix = mfree(setup->mount_suffix); |
438 | ||
70a5db58 LP |
439 | return r; |
440 | } | |
441 | ||
aa0a6214 | 442 | int home_setup( |
70a5db58 | 443 | UserRecord *h, |
e1df968b | 444 | HomeSetupFlags flags, |
70a5db58 | 445 | HomeSetup *setup, |
c00b2ddc | 446 | PasswordCache *cache, |
70a5db58 LP |
447 | UserRecord **ret_header_home) { |
448 | ||
449 | int r; | |
450 | ||
451 | assert(h); | |
452 | assert(setup); | |
453 | assert(!setup->loop); | |
454 | assert(!setup->crypt_device); | |
455 | assert(setup->root_fd < 0); | |
456 | assert(!setup->undo_dm); | |
457 | assert(!setup->undo_mount); | |
458 | ||
459 | /* Makes a home directory accessible (through the root_fd file descriptor, not by path!). */ | |
460 | ||
e1df968b | 461 | if (!FLAGS_SET(flags, HOME_SETUP_ALREADY_ACTIVATED)) /* If we set up the directory, we should also drop caches once we are done */ |
86019efa LP |
462 | setup->do_drop_caches = setup->do_drop_caches || user_record_drop_caches(h); |
463 | ||
70a5db58 LP |
464 | switch (user_record_storage(h)) { |
465 | ||
466 | case USER_LUKS: | |
c00b2ddc | 467 | return home_setup_luks(h, flags, NULL, setup, cache, ret_header_home); |
70a5db58 LP |
468 | |
469 | case USER_SUBVOLUME: | |
470 | case USER_DIRECTORY: | |
e1df968b | 471 | r = home_setup_directory(h, setup); |
70a5db58 LP |
472 | break; |
473 | ||
474 | case USER_FSCRYPT: | |
c00b2ddc | 475 | r = home_setup_fscrypt(h, setup, cache); |
70a5db58 LP |
476 | break; |
477 | ||
478 | case USER_CIFS: | |
e1df968b | 479 | r = home_setup_cifs(h, flags, setup); |
70a5db58 LP |
480 | break; |
481 | ||
482 | default: | |
483 | return log_error_errno(SYNTHETIC_ERRNO(ENOLINK), "Processing home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
484 | } | |
485 | ||
486 | if (r < 0) | |
487 | return r; | |
488 | ||
489 | if (ret_header_home) | |
490 | *ret_header_home = NULL; | |
491 | ||
492 | return r; | |
493 | } | |
494 | ||
495 | int home_sync_and_statfs(int root_fd, struct statfs *ret) { | |
496 | assert(root_fd >= 0); | |
497 | ||
498 | /* Let's sync this to disk, so that the disk space reported by fstatfs() below is accurate (for file | |
499 | * systems such as btrfs where this is determined lazily). */ | |
500 | ||
501 | if (syncfs(root_fd) < 0) | |
502 | return log_error_errno(errno, "Failed to synchronize file system: %m"); | |
503 | ||
504 | if (ret) | |
505 | if (fstatfs(root_fd, ret) < 0) | |
506 | return log_error_errno(errno, "Failed to statfs() file system: %m"); | |
507 | ||
508 | log_info("Synchronized disk."); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static int read_identity_file(int root_fd, JsonVariant **ret) { | |
514 | _cleanup_(fclosep) FILE *identity_file = NULL; | |
254d1313 | 515 | _cleanup_close_ int identity_fd = -EBADF; |
70a5db58 LP |
516 | unsigned line, column; |
517 | int r; | |
518 | ||
519 | assert(root_fd >= 0); | |
520 | assert(ret); | |
521 | ||
522 | identity_fd = openat(root_fd, ".identity", O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW|O_NONBLOCK); | |
523 | if (identity_fd < 0) | |
524 | return log_error_errno(errno, "Failed to open .identity file in home directory: %m"); | |
525 | ||
526 | r = fd_verify_regular(identity_fd); | |
527 | if (r < 0) | |
528 | return log_error_errno(r, "Embedded identity file is not a regular file, refusing: %m"); | |
529 | ||
4fa744a3 | 530 | identity_file = take_fdopen(&identity_fd, "r"); |
70a5db58 LP |
531 | if (!identity_file) |
532 | return log_oom(); | |
533 | ||
70a5db58 LP |
534 | r = json_parse_file(identity_file, ".identity", JSON_PARSE_SENSITIVE, ret, &line, &column); |
535 | if (r < 0) | |
536 | return log_error_errno(r, "[.identity:%u:%u] Failed to parse JSON data: %m", line, column); | |
537 | ||
538 | log_info("Read embedded .identity file."); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static int write_identity_file(int root_fd, JsonVariant *v, uid_t uid) { | |
544 | _cleanup_(json_variant_unrefp) JsonVariant *normalized = NULL; | |
545 | _cleanup_(fclosep) FILE *identity_file = NULL; | |
254d1313 | 546 | _cleanup_close_ int identity_fd = -EBADF; |
70a5db58 LP |
547 | _cleanup_free_ char *fn = NULL; |
548 | int r; | |
549 | ||
550 | assert(root_fd >= 0); | |
551 | assert(v); | |
552 | ||
553 | normalized = json_variant_ref(v); | |
554 | ||
555 | r = json_variant_normalize(&normalized); | |
556 | if (r < 0) | |
557 | log_warning_errno(r, "Failed to normalize user record, ignoring: %m"); | |
558 | ||
559 | r = tempfn_random(".identity", NULL, &fn); | |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
563 | identity_fd = openat(root_fd, fn, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600); | |
564 | if (identity_fd < 0) | |
565 | return log_error_errno(errno, "Failed to create .identity file in home directory: %m"); | |
566 | ||
4fa744a3 | 567 | identity_file = take_fdopen(&identity_fd, "w"); |
70a5db58 LP |
568 | if (!identity_file) { |
569 | r = log_oom(); | |
570 | goto fail; | |
571 | } | |
572 | ||
70a5db58 LP |
573 | json_variant_dump(normalized, JSON_FORMAT_PRETTY, identity_file, NULL); |
574 | ||
575 | r = fflush_and_check(identity_file); | |
576 | if (r < 0) { | |
577 | log_error_errno(r, "Failed to write .identity file: %m"); | |
578 | goto fail; | |
579 | } | |
580 | ||
581 | if (fchown(fileno(identity_file), uid, uid) < 0) { | |
b05f4495 | 582 | r = log_error_errno(errno, "Failed to change ownership of identity file: %m"); |
70a5db58 LP |
583 | goto fail; |
584 | } | |
585 | ||
586 | if (renameat(root_fd, fn, root_fd, ".identity") < 0) { | |
587 | r = log_error_errno(errno, "Failed to move identity file into place: %m"); | |
588 | goto fail; | |
589 | } | |
590 | ||
591 | log_info("Wrote embedded .identity file."); | |
592 | ||
593 | return 0; | |
594 | ||
595 | fail: | |
596 | (void) unlinkat(root_fd, fn, 0); | |
597 | return r; | |
598 | } | |
599 | ||
600 | int home_load_embedded_identity( | |
601 | UserRecord *h, | |
602 | int root_fd, | |
603 | UserRecord *header_home, | |
604 | UserReconcileMode mode, | |
7b78db28 | 605 | PasswordCache *cache, |
70a5db58 LP |
606 | UserRecord **ret_embedded_home, |
607 | UserRecord **ret_new_home) { | |
608 | ||
609 | _cleanup_(user_record_unrefp) UserRecord *embedded_home = NULL, *intermediate_home = NULL, *new_home = NULL; | |
610 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
611 | int r; | |
612 | ||
613 | assert(h); | |
614 | assert(root_fd >= 0); | |
615 | ||
616 | r = read_identity_file(root_fd, &v); | |
617 | if (r < 0) | |
618 | return r; | |
619 | ||
620 | embedded_home = user_record_new(); | |
621 | if (!embedded_home) | |
622 | return log_oom(); | |
623 | ||
bfc0cc1a | 624 | r = user_record_load(embedded_home, v, USER_RECORD_LOAD_EMBEDDED|USER_RECORD_PERMISSIVE); |
70a5db58 LP |
625 | if (r < 0) |
626 | return r; | |
627 | ||
628 | if (!user_record_compatible(h, embedded_home)) | |
80ace4f2 | 629 | return log_error_errno(SYNTHETIC_ERRNO(EREMCHG), "Embedded home record not compatible with host record, refusing."); |
70a5db58 LP |
630 | |
631 | /* Insist that credentials the user supplies also unlocks any embedded records. */ | |
7b78db28 | 632 | r = user_record_authenticate(embedded_home, h, cache, /* strict_verify= */ true); |
70a5db58 LP |
633 | if (r < 0) |
634 | return r; | |
c8f145ad | 635 | assert(r > 0); /* Insist that a password was verified */ |
70a5db58 LP |
636 | |
637 | /* At this point we have three records to deal with: | |
638 | * | |
639 | * · The record we got passed from the host | |
640 | * · The record included in the LUKS header (only if LUKS is used) | |
641 | * · The record in the home directory itself (~.identity) | |
642 | * | |
643 | * Now we have to reconcile all three, and let the newest one win. */ | |
644 | ||
645 | if (header_home) { | |
646 | /* Note we relax the requirements here. Instead of insisting that the host record is strictly | |
647 | * newer, let's also be OK if its equally new. If it is, we'll however insist that the | |
648 | * embedded record must be newer, so that we update at least one of the two. */ | |
649 | ||
650 | r = user_record_reconcile(h, header_home, mode == USER_RECONCILE_REQUIRE_NEWER ? USER_RECONCILE_REQUIRE_NEWER_OR_EQUAL : mode, &intermediate_home); | |
651 | if (r == -EREMCHG) /* this was supposed to be checked earlier already, but let's check this again */ | |
652 | return log_error_errno(r, "Identity stored on host and in header don't match, refusing."); | |
653 | if (r == -ESTALE) | |
654 | return log_error_errno(r, "Embedded identity record is newer than supplied record, refusing."); | |
655 | if (r < 0) | |
656 | return log_error_errno(r, "Failed to reconcile host and header identities: %m"); | |
657 | if (r == USER_RECONCILE_EMBEDDED_WON) | |
658 | log_info("Reconciling header user identity completed (header version was newer)."); | |
659 | else if (r == USER_RECONCILE_HOST_WON) { | |
660 | log_info("Reconciling header user identity completed (host version was newer)."); | |
661 | ||
662 | if (mode == USER_RECONCILE_REQUIRE_NEWER) /* Host version is newer than the header | |
663 | * version, hence we'll update | |
664 | * something. This means we can relax the | |
665 | * requirements on the embedded | |
666 | * identity. */ | |
667 | mode = USER_RECONCILE_REQUIRE_NEWER_OR_EQUAL; | |
668 | } else { | |
669 | assert(r == USER_RECONCILE_IDENTICAL); | |
670 | log_info("Reconciling user identities completed (host and header version were identical)."); | |
671 | } | |
672 | ||
673 | h = intermediate_home; | |
674 | } | |
675 | ||
676 | r = user_record_reconcile(h, embedded_home, mode, &new_home); | |
677 | if (r == -EREMCHG) | |
678 | return log_error_errno(r, "Identity stored on host and in home don't match, refusing."); | |
679 | if (r == -ESTALE) | |
680 | return log_error_errno(r, "Embedded identity record is equally new or newer than supplied record, refusing."); | |
681 | if (r < 0) | |
682 | return log_error_errno(r, "Failed to reconcile host and embedded identities: %m"); | |
683 | if (r == USER_RECONCILE_EMBEDDED_WON) | |
684 | log_info("Reconciling embedded user identity completed (embedded version was newer)."); | |
685 | else if (r == USER_RECONCILE_HOST_WON) | |
686 | log_info("Reconciling embedded user identity completed (host version was newer)."); | |
687 | else { | |
688 | assert(r == USER_RECONCILE_IDENTICAL); | |
689 | log_info("Reconciling embedded user identity completed (host and embedded version were identical)."); | |
690 | } | |
691 | ||
692 | if (ret_embedded_home) | |
693 | *ret_embedded_home = TAKE_PTR(embedded_home); | |
694 | ||
695 | if (ret_new_home) | |
696 | *ret_new_home = TAKE_PTR(new_home); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | int home_store_embedded_identity(UserRecord *h, int root_fd, uid_t uid, UserRecord *old_home) { | |
702 | _cleanup_(user_record_unrefp) UserRecord *embedded = NULL; | |
703 | int r; | |
704 | ||
705 | assert(h); | |
706 | assert(root_fd >= 0); | |
707 | assert(uid_is_valid(uid)); | |
708 | ||
bfc0cc1a | 709 | r = user_record_clone(h, USER_RECORD_EXTRACT_EMBEDDED|USER_RECORD_PERMISSIVE, &embedded); |
70a5db58 LP |
710 | if (r < 0) |
711 | return log_error_errno(r, "Failed to determine new embedded record: %m"); | |
712 | ||
713 | if (old_home && user_record_equal(old_home, embedded)) { | |
714 | log_debug("Not updating embedded home record."); | |
715 | return 0; | |
716 | } | |
717 | ||
718 | /* The identity has changed, let's update it in the image */ | |
719 | r = write_identity_file(root_fd, embedded->json, h->uid); | |
720 | if (r < 0) | |
721 | return r; | |
722 | ||
723 | return 1; | |
724 | } | |
725 | ||
726 | static const char *file_system_type_fd(int fd) { | |
727 | struct statfs sfs; | |
728 | ||
729 | assert(fd >= 0); | |
730 | ||
731 | if (fstatfs(fd, &sfs) < 0) { | |
732 | log_debug_errno(errno, "Failed to statfs(): %m"); | |
733 | return NULL; | |
734 | } | |
735 | ||
7c604e89 | 736 | return fs_type_to_string(sfs.f_type); |
70a5db58 LP |
737 | } |
738 | ||
739 | int home_extend_embedded_identity(UserRecord *h, UserRecord *used, HomeSetup *setup) { | |
740 | int r; | |
741 | ||
742 | assert(h); | |
743 | assert(used); | |
744 | assert(setup); | |
745 | ||
746 | r = user_record_add_binding( | |
747 | h, | |
748 | user_record_storage(used), | |
749 | user_record_image_path(used), | |
750 | setup->found_partition_uuid, | |
751 | setup->found_luks_uuid, | |
752 | setup->found_fs_uuid, | |
71eceff6 LP |
753 | setup->crypt_device ? sym_crypt_get_cipher(setup->crypt_device) : NULL, |
754 | setup->crypt_device ? sym_crypt_get_cipher_mode(setup->crypt_device) : NULL, | |
70a5db58 LP |
755 | setup->crypt_device ? luks_volume_key_size_convert(setup->crypt_device) : UINT64_MAX, |
756 | file_system_type_fd(setup->root_fd), | |
757 | user_record_home_directory(used), | |
758 | used->uid, | |
759 | (gid_t) used->uid); | |
760 | if (r < 0) | |
761 | return log_error_errno(r, "Failed to update binding in record: %m"); | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | static int chown_recursive_directory(int root_fd, uid_t uid) { | |
767 | int r; | |
768 | ||
769 | assert(root_fd >= 0); | |
770 | assert(uid_is_valid(uid)); | |
771 | ||
772 | r = fd_chown_recursive(root_fd, uid, (gid_t) uid, 0777); | |
773 | if (r < 0) | |
774 | return log_error_errno(r, "Failed to change ownership of files and directories: %m"); | |
775 | if (r == 0) | |
776 | log_info("Recursive changing of ownership not necessary, skipped."); | |
777 | else | |
778 | log_info("Recursive changing of ownership completed."); | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
cf5115f6 LP |
783 | int home_maybe_shift_uid( |
784 | UserRecord *h, | |
6f2c8136 | 785 | HomeSetupFlags flags, |
cf5115f6 LP |
786 | HomeSetup *setup) { |
787 | ||
254d1313 | 788 | _cleanup_close_ int mount_fd = -EBADF; |
cf5115f6 LP |
789 | struct stat st; |
790 | ||
791 | assert(h); | |
792 | assert(setup); | |
793 | assert(setup->root_fd >= 0); | |
794 | ||
6f2c8136 LP |
795 | /* If the home dir is already activated, then the UID shift is already applied. */ |
796 | if (FLAGS_SET(flags, HOME_SETUP_ALREADY_ACTIVATED)) | |
797 | return 0; | |
798 | ||
cf5115f6 LP |
799 | if (fstat(setup->root_fd, &st) < 0) |
800 | return log_error_errno(errno, "Failed to stat() home directory: %m"); | |
801 | ||
802 | /* Let's shift UIDs of this mount. Hopefully this makes the later chowning unnecessary. (Note that we | |
803 | * also prefer to do UID mapping even if the UID already matches our goal UID. That's because we want | |
804 | * to leave UIDs in the homed managed range unmapped.) */ | |
805 | (void) home_shift_uid(setup->root_fd, NULL, st.st_uid, h->uid, &mount_fd); | |
806 | ||
807 | /* If this worked, then we'll have a reference to the mount now, which we can also use like an O_PATH | |
808 | * fd to the new dir. Let's convert it into a proper O_DIRECTORY fd. */ | |
809 | if (mount_fd >= 0) { | |
810 | safe_close(setup->root_fd); | |
811 | ||
812 | setup->root_fd = fd_reopen(mount_fd, O_RDONLY|O_CLOEXEC|O_DIRECTORY); | |
813 | if (setup->root_fd < 0) | |
814 | return log_error_errno(setup->root_fd, "Failed to convert mount fd into regular directory fd: %m"); | |
815 | } | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
70a5db58 LP |
820 | int home_refresh( |
821 | UserRecord *h, | |
6f2c8136 | 822 | HomeSetupFlags flags, |
70a5db58 LP |
823 | HomeSetup *setup, |
824 | UserRecord *header_home, | |
7b78db28 | 825 | PasswordCache *cache, |
70a5db58 LP |
826 | struct statfs *ret_statfs, |
827 | UserRecord **ret_new_home) { | |
828 | ||
829 | _cleanup_(user_record_unrefp) UserRecord *embedded_home = NULL, *new_home = NULL; | |
830 | int r; | |
831 | ||
832 | assert(h); | |
833 | assert(setup); | |
834 | assert(ret_new_home); | |
835 | ||
836 | /* When activating a home directory, does the identity work: loads the identity from the $HOME | |
837 | * directory, reconciles it with our idea, chown()s everything. */ | |
838 | ||
7b78db28 | 839 | r = home_load_embedded_identity(h, setup->root_fd, header_home, USER_RECONCILE_ANY, cache, &embedded_home, &new_home); |
70a5db58 LP |
840 | if (r < 0) |
841 | return r; | |
842 | ||
6f2c8136 | 843 | r = home_maybe_shift_uid(h, flags, setup); |
cf5115f6 LP |
844 | if (r < 0) |
845 | return r; | |
846 | ||
70a5db58 LP |
847 | r = home_store_header_identity_luks(new_home, setup, header_home); |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
851 | r = home_store_embedded_identity(new_home, setup->root_fd, h->uid, embedded_home); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | r = chown_recursive_directory(setup->root_fd, h->uid); | |
856 | if (r < 0) | |
857 | return r; | |
858 | ||
859 | r = home_sync_and_statfs(setup->root_fd, ret_statfs); | |
860 | if (r < 0) | |
861 | return r; | |
862 | ||
863 | *ret_new_home = TAKE_PTR(new_home); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | static int home_activate(UserRecord *h, UserRecord **ret_home) { | |
a74e2e44 | 868 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
70a5db58 | 869 | _cleanup_(user_record_unrefp) UserRecord *new_home = NULL; |
a74e2e44 | 870 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
6f2c8136 | 871 | HomeSetupFlags flags = 0; |
70a5db58 LP |
872 | int r; |
873 | ||
874 | assert(h); | |
875 | ||
876 | if (!h->user_name) | |
877 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks user name, refusing."); | |
878 | if (!uid_is_valid(h->uid)) | |
879 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks UID, refusing."); | |
880 | if (!IN_SET(user_record_storage(h), USER_LUKS, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT, USER_CIFS)) | |
881 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Activating home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
882 | ||
7b78db28 | 883 | r = user_record_authenticate(h, h, &cache, /* strict_verify= */ false); |
70a5db58 LP |
884 | if (r < 0) |
885 | return r; | |
886 | ||
887 | r = user_record_test_home_directory_and_warn(h); | |
888 | if (r < 0) | |
889 | return r; | |
890 | if (r == USER_TEST_MOUNTED) | |
891 | return log_error_errno(SYNTHETIC_ERRNO(EALREADY), "Home directory %s is already mounted, refusing.", user_record_home_directory(h)); | |
892 | ||
893 | r = user_record_test_image_path_and_warn(h); | |
894 | if (r < 0) | |
895 | return r; | |
896 | if (r == USER_TEST_ABSENT) | |
897 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "Image path %s is missing, refusing.", user_record_image_path(h)); | |
898 | ||
899 | switch (user_record_storage(h)) { | |
900 | ||
901 | case USER_LUKS: | |
6f2c8136 | 902 | r = home_activate_luks(h, flags, &setup, &cache, &new_home); |
70a5db58 LP |
903 | if (r < 0) |
904 | return r; | |
905 | ||
906 | break; | |
907 | ||
908 | case USER_SUBVOLUME: | |
909 | case USER_DIRECTORY: | |
910 | case USER_FSCRYPT: | |
6f2c8136 | 911 | r = home_activate_directory(h, flags, &setup, &cache, &new_home); |
70a5db58 LP |
912 | if (r < 0) |
913 | return r; | |
914 | ||
915 | break; | |
916 | ||
917 | case USER_CIFS: | |
6f2c8136 | 918 | r = home_activate_cifs(h, flags, &setup, &cache, &new_home); |
70a5db58 LP |
919 | if (r < 0) |
920 | return r; | |
921 | ||
922 | break; | |
923 | ||
924 | default: | |
04499a70 | 925 | assert_not_reached(); |
70a5db58 LP |
926 | } |
927 | ||
928 | /* Note that the returned object might either be a reference to an updated version of the existing | |
929 | * home object, or a reference to a newly allocated home object. The caller has to be able to deal | |
930 | * with both, and consider the old object out-of-date. */ | |
931 | if (user_record_equal(h, new_home)) { | |
932 | *ret_home = NULL; | |
933 | return 0; /* no identity change */ | |
934 | } | |
935 | ||
936 | *ret_home = TAKE_PTR(new_home); | |
937 | return 1; /* identity updated */ | |
938 | } | |
939 | ||
940 | static int home_deactivate(UserRecord *h, bool force) { | |
fc032ae1 | 941 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
26191000 | 942 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
70a5db58 LP |
943 | bool done = false; |
944 | int r; | |
945 | ||
946 | assert(h); | |
947 | ||
948 | if (!h->user_name) | |
949 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record incomplete, refusing."); | |
950 | if (!IN_SET(user_record_storage(h), USER_LUKS, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT, USER_CIFS)) | |
951 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Deactivating home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
952 | ||
953 | r = user_record_test_home_directory_and_warn(h); | |
954 | if (r < 0) | |
955 | return r; | |
956 | if (r == USER_TEST_MOUNTED) { | |
a71a0693 LP |
957 | /* Before we do anything, let's move the home mount away. */ |
958 | r = home_unshare_and_mkdir(); | |
959 | if (r < 0) | |
960 | return r; | |
28a7f106 | 961 | |
a71a0693 LP |
962 | r = mount_nofollow_verbose(LOG_ERR, user_record_home_directory(h), HOME_RUNTIME_WORK_DIR, NULL, MS_BIND, NULL); |
963 | if (r < 0) | |
964 | return r; | |
965 | ||
966 | setup.undo_mount = true; /* remember to unmount the new bind mount from HOME_RUNTIME_WORK_DIR */ | |
967 | ||
968 | /* Let's explicitly open the new root fs, using the moved path */ | |
969 | setup.root_fd = open(HOME_RUNTIME_WORK_DIR, O_RDONLY|O_DIRECTORY|O_CLOEXEC); | |
970 | if (setup.root_fd < 0) | |
971 | return log_error_errno(errno, "Failed to open moved home directory: %m"); | |
972 | ||
973 | /* Now get rid of the home at its original place (we only keep the bind mount we created above) */ | |
974 | r = umount_verbose(LOG_ERR, user_record_home_directory(h), UMOUNT_NOFOLLOW | (force ? MNT_FORCE|MNT_DETACH : 0)); | |
86019efa | 975 | if (r < 0) |
a71a0693 LP |
976 | return r; |
977 | ||
d26cdde3 LP |
978 | if (user_record_storage(h) == USER_LUKS) { |
979 | /* Automatically shrink on logout if that's enabled. To be able to shrink we need the | |
980 | * keys to the device. */ | |
981 | password_cache_load_keyring(h, &cache); | |
a71a0693 | 982 | (void) home_trim_luks(h, &setup); |
d26cdde3 | 983 | } |
a71a0693 LP |
984 | |
985 | /* Sync explicitly, so that the drop caches logic below can work as documented */ | |
986 | if (syncfs(setup.root_fd) < 0) | |
987 | log_debug_errno(errno, "Failed to synchronize home directory, ignoring: %m"); | |
86019efa LP |
988 | else |
989 | log_info("Syncing completed."); | |
990 | ||
26191000 LP |
991 | if (user_record_storage(h) == USER_LUKS) |
992 | (void) home_auto_shrink_luks(h, &setup, &cache); | |
993 | ||
a71a0693 LP |
994 | setup.root_fd = safe_close(setup.root_fd); |
995 | ||
996 | /* Now get rid of the bind mount, too */ | |
997 | r = umount_verbose(LOG_ERR, HOME_RUNTIME_WORK_DIR, UMOUNT_NOFOLLOW | (force ? MNT_FORCE|MNT_DETACH : 0)); | |
998 | if (r < 0) | |
999 | return r; | |
1000 | ||
1001 | setup.undo_mount = false; /* Remember that the bind mount doesn't need to be unmounted anymore */ | |
1002 | ||
1003 | if (user_record_drop_caches(h)) | |
1004 | setup.do_drop_caches = true; | |
70a5db58 LP |
1005 | |
1006 | log_info("Unmounting completed."); | |
1007 | done = true; | |
1008 | } else | |
1009 | log_info("Directory %s is already unmounted.", user_record_home_directory(h)); | |
1010 | ||
1011 | if (user_record_storage(h) == USER_LUKS) { | |
fc032ae1 | 1012 | r = home_deactivate_luks(h, &setup); |
70a5db58 LP |
1013 | if (r < 0) |
1014 | return r; | |
1015 | if (r > 0) | |
1016 | done = true; | |
1017 | } | |
1018 | ||
d26cdde3 LP |
1019 | /* Explicitly flush any per-user key from the keyring */ |
1020 | (void) keyring_flush(h); | |
1021 | ||
70a5db58 LP |
1022 | if (!done) |
1023 | return log_error_errno(SYNTHETIC_ERRNO(ENOEXEC), "Home is not active."); | |
1024 | ||
a71a0693 LP |
1025 | if (setup.do_drop_caches) { |
1026 | setup.do_drop_caches = false; | |
86019efa | 1027 | drop_caches_now(); |
a71a0693 | 1028 | } |
86019efa | 1029 | |
70a5db58 LP |
1030 | log_info("Everything completed."); |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | static int copy_skel(int root_fd, const char *skel) { | |
1035 | int r; | |
1036 | ||
1037 | assert(root_fd >= 0); | |
1038 | ||
a424958a | 1039 | r = copy_tree_at(AT_FDCWD, skel, root_fd, ".", UID_INVALID, GID_INVALID, COPY_MERGE|COPY_REPLACE, NULL); |
70a5db58 LP |
1040 | if (r == -ENOENT) { |
1041 | log_info("Skeleton directory %s missing, ignoring.", skel); | |
1042 | return 0; | |
1043 | } | |
1044 | if (r < 0) | |
1045 | return log_error_errno(r, "Failed to copy in %s: %m", skel); | |
1046 | ||
1047 | log_info("Copying in %s completed.", skel); | |
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | static int change_access_mode(int root_fd, mode_t m) { | |
1052 | assert(root_fd >= 0); | |
1053 | ||
1054 | if (fchmod(root_fd, m) < 0) | |
1055 | return log_error_errno(errno, "Failed to change access mode of top-level directory: %m"); | |
1056 | ||
1057 | log_info("Changed top-level directory access mode to 0%o.", m); | |
1058 | return 0; | |
1059 | } | |
1060 | ||
1061 | int home_populate(UserRecord *h, int dir_fd) { | |
1062 | int r; | |
1063 | ||
1064 | assert(h); | |
1065 | assert(dir_fd >= 0); | |
1066 | ||
1067 | r = copy_skel(dir_fd, user_record_skeleton_directory(h)); | |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | ||
1071 | r = home_store_embedded_identity(h, dir_fd, h->uid, NULL); | |
1072 | if (r < 0) | |
1073 | return r; | |
1074 | ||
1075 | r = chown_recursive_directory(dir_fd, h->uid); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | r = change_access_mode(dir_fd, user_record_access_mode(h)); | |
1080 | if (r < 0) | |
1081 | return r; | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static int user_record_compile_effective_passwords( | |
1087 | UserRecord *h, | |
7b78db28 LP |
1088 | PasswordCache *cache, |
1089 | char ***ret_effective_passwords) { | |
70a5db58 | 1090 | |
7b78db28 | 1091 | _cleanup_(strv_free_erasep) char **effective = NULL; |
70a5db58 | 1092 | size_t n; |
70a5db58 LP |
1093 | int r; |
1094 | ||
1095 | assert(h); | |
7b78db28 | 1096 | assert(cache); |
70a5db58 LP |
1097 | |
1098 | /* We insist on at least one classic hashed password to be defined in addition to any PKCS#11 one, as | |
1099 | * a safe fallback, but also to simplify the password changing algorithm: there we require providing | |
1100 | * the old literal password only (and do not care for the old PKCS#11 token) */ | |
1101 | ||
1102 | if (strv_isempty(h->hashed_password)) | |
d7a0f1f4 FS |
1103 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
1104 | "User record has no hashed passwords, refusing."); | |
70a5db58 LP |
1105 | |
1106 | /* Generates the list of plaintext passwords to propagate to LUKS/fscrypt devices, and checks whether | |
1107 | * we have a plaintext password for each hashed one. If we are missing one we'll fail, since we | |
1108 | * couldn't sync fscrypt/LUKS to the login account properly. */ | |
1109 | ||
1110 | STRV_FOREACH(i, h->hashed_password) { | |
1111 | bool found = false; | |
70a5db58 LP |
1112 | |
1113 | log_debug("Looking for plaintext password for: %s", *i); | |
1114 | ||
1115 | /* Let's scan all provided plaintext passwords */ | |
1116 | STRV_FOREACH(j, h->password) { | |
1117 | r = test_password_one(*i, *j); | |
1118 | if (r < 0) | |
87d7893c | 1119 | return log_error_errno(r, "Failed to test plaintext password: %m"); |
70a5db58 LP |
1120 | if (r > 0) { |
1121 | if (ret_effective_passwords) { | |
1122 | r = strv_extend(&effective, *j); | |
1123 | if (r < 0) | |
1124 | return log_oom(); | |
1125 | } | |
1126 | ||
1127 | log_debug("Found literal plaintext password."); | |
1128 | found = true; | |
1129 | break; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | if (!found) | |
1134 | return log_error_errno(SYNTHETIC_ERRNO(ENOKEY), "Missing plaintext password for defined hashed password"); | |
1135 | } | |
1136 | ||
87d7893c LP |
1137 | for (n = 0; n < h->n_recovery_key; n++) { |
1138 | bool found = false; | |
87d7893c LP |
1139 | |
1140 | log_debug("Looking for plaintext recovery key for: %s", h->recovery_key[n].hashed_password); | |
1141 | ||
1142 | STRV_FOREACH(j, h->password) { | |
1143 | _cleanup_(erase_and_freep) char *mangled = NULL; | |
1144 | const char *p; | |
1145 | ||
1146 | if (streq(h->recovery_key[n].type, "modhex64")) { | |
1147 | ||
1148 | r = normalize_recovery_key(*j, &mangled); | |
1149 | if (r == -EINVAL) /* Not properly formatted, probably a regular password. */ | |
1150 | continue; | |
1151 | if (r < 0) | |
1152 | return log_error_errno(r, "Failed to normalize recovery key: %m"); | |
1153 | ||
1154 | p = mangled; | |
1155 | } else | |
1156 | p = *j; | |
1157 | ||
1158 | r = test_password_one(h->recovery_key[n].hashed_password, p); | |
1159 | if (r < 0) | |
1160 | return log_error_errno(r, "Failed to test plaintext recovery key: %m"); | |
1161 | if (r > 0) { | |
1162 | if (ret_effective_passwords) { | |
1163 | r = strv_extend(&effective, p); | |
1164 | if (r < 0) | |
1165 | return log_oom(); | |
1166 | } | |
1167 | ||
1168 | log_debug("Found plaintext recovery key."); | |
1169 | found = true; | |
1170 | break; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | if (!found) | |
1175 | return log_error_errno(SYNTHETIC_ERRNO(EREMOTEIO), "Missing plaintext recovery key for defined recovery key"); | |
1176 | } | |
1177 | ||
70a5db58 LP |
1178 | for (n = 0; n < h->n_pkcs11_encrypted_key; n++) { |
1179 | #if HAVE_P11KIT | |
1180 | _cleanup_(pkcs11_callback_data_release) struct pkcs11_callback_data data = { | |
1181 | .user_record = h, | |
1182 | .secret = h, | |
1183 | .encrypted_key = h->pkcs11_encrypted_key + n, | |
1184 | }; | |
1185 | ||
1186 | r = pkcs11_find_token(data.encrypted_key->uri, pkcs11_callback, &data); | |
1187 | if (r == -EAGAIN) | |
1188 | return -EBADSLT; | |
1189 | if (r < 0) | |
1190 | return r; | |
1191 | ||
1192 | r = test_password_one(data.encrypted_key->hashed_password, data.decrypted_password); | |
1193 | if (r < 0) | |
1194 | return log_error_errno(r, "Failed to test PKCS#11 password: %m"); | |
1195 | if (r == 0) | |
1196 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Decrypted password from token is not correct, refusing."); | |
1197 | ||
1198 | if (ret_effective_passwords) { | |
1199 | r = strv_extend(&effective, data.decrypted_password); | |
1200 | if (r < 0) | |
1201 | return log_oom(); | |
1202 | } | |
1203 | ||
7b78db28 LP |
1204 | r = strv_extend(&cache->pkcs11_passwords, data.decrypted_password); |
1205 | if (r < 0) | |
1206 | return log_oom(); | |
1207 | #else | |
1208 | return -EBADSLT; | |
1209 | #endif | |
1210 | } | |
1211 | ||
1212 | for (n = 0; n < h->n_fido2_hmac_salt; n++) { | |
1213 | #if HAVE_LIBFIDO2 | |
1214 | _cleanup_(erase_and_freep) char *decrypted_password = NULL; | |
1215 | ||
1216 | r = fido2_use_token(h, h, h->fido2_hmac_salt + n, &decrypted_password); | |
1217 | if (r < 0) | |
1218 | return r; | |
1219 | ||
1220 | r = test_password_one(h->fido2_hmac_salt[n].hashed_password, decrypted_password); | |
1221 | if (r < 0) | |
1222 | return log_error_errno(r, "Failed to test FIDO2 password: %m"); | |
1223 | if (r == 0) | |
1224 | return log_error_errno(SYNTHETIC_ERRNO(EPERM), "Decrypted password from token is not correct, refusing."); | |
1225 | ||
1226 | if (ret_effective_passwords) { | |
1227 | r = strv_extend(&effective, decrypted_password); | |
70a5db58 LP |
1228 | if (r < 0) |
1229 | return log_oom(); | |
1230 | } | |
7b78db28 LP |
1231 | |
1232 | r = strv_extend(&cache->fido2_passwords, decrypted_password); | |
1233 | if (r < 0) | |
1234 | return log_oom(); | |
70a5db58 LP |
1235 | #else |
1236 | return -EBADSLT; | |
1237 | #endif | |
1238 | } | |
1239 | ||
1240 | if (ret_effective_passwords) | |
1241 | *ret_effective_passwords = TAKE_PTR(effective); | |
70a5db58 LP |
1242 | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1dfe5de0 LP |
1246 | static int determine_default_storage(UserStorage *ret) { |
1247 | UserStorage storage = _USER_STORAGE_INVALID; | |
1248 | const char *e; | |
1249 | int r; | |
1250 | ||
1251 | assert(ret); | |
1252 | ||
1253 | /* homed tells us via an environment variable which default storage to use */ | |
1254 | e = getenv("SYSTEMD_HOME_DEFAULT_STORAGE"); | |
1255 | if (e) { | |
1256 | storage = user_storage_from_string(e); | |
1257 | if (storage < 0) | |
1258 | log_warning("$SYSTEMD_HOME_DEFAULT_STORAGE set to invalid storage type, ignoring: %s", e); | |
1259 | else { | |
1260 | log_info("Using configured default storage '%s'.", user_storage_to_string(storage)); | |
1261 | *ret = storage; | |
1262 | return 0; | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | /* When neither user nor admin specified the storage type to use, fix it to be LUKS — unless we run | |
1267 | * in a container where loopback devices and LUKS/DM are not available. Also, if /home is encrypted | |
1268 | * anyway, let's avoid duplicate encryption. Note that we typically default to the assumption of | |
1269 | * "classic" storage for most operations. However, if we create a new home, then let's user LUKS if | |
1270 | * nothing is specified. */ | |
1271 | ||
1272 | r = detect_container(); | |
1273 | if (r < 0) | |
1274 | return log_error_errno(r, "Failed to determine whether we are in a container: %m"); | |
1275 | if (r == 0) { | |
2700fecd | 1276 | r = path_is_encrypted(get_home_root()); |
0608e2d3 | 1277 | if (r > 0) |
2700fecd | 1278 | log_info("%s is encrypted, not using '%s' storage, in order to avoid double encryption.", get_home_root(), user_storage_to_string(USER_LUKS)); |
0608e2d3 LP |
1279 | else { |
1280 | if (r < 0) | |
2700fecd | 1281 | log_warning_errno(r, "Failed to determine if %s is encrypted, ignoring: %m", get_home_root()); |
1dfe5de0 | 1282 | |
0608e2d3 LP |
1283 | r = dlopen_cryptsetup(); |
1284 | if (r < 0) | |
1285 | log_info("Not using '%s' storage, since libcryptsetup could not be loaded.", user_storage_to_string(USER_LUKS)); | |
1286 | else { | |
1287 | log_info("Using automatic default storage of '%s'.", user_storage_to_string(USER_LUKS)); | |
1288 | *ret = USER_LUKS; | |
1289 | return 0; | |
1290 | } | |
1291 | } | |
1dfe5de0 LP |
1292 | } else |
1293 | log_info("Running in container, not using '%s' storage.", user_storage_to_string(USER_LUKS)); | |
1294 | ||
2700fecd | 1295 | r = path_is_fs_type(get_home_root(), BTRFS_SUPER_MAGIC); |
1dfe5de0 | 1296 | if (r < 0) |
2700fecd | 1297 | log_warning_errno(r, "Failed to determine file system of %s, ignoring: %m", get_home_root()); |
1dfe5de0 | 1298 | if (r > 0) { |
2700fecd | 1299 | log_info("%s is on btrfs, using '%s' as storage.", get_home_root(), user_storage_to_string(USER_SUBVOLUME)); |
1dfe5de0 LP |
1300 | *ret = USER_SUBVOLUME; |
1301 | } else { | |
2700fecd | 1302 | log_info("%s is on simple file system, using '%s' as storage.", get_home_root(), user_storage_to_string(USER_DIRECTORY)); |
1dfe5de0 LP |
1303 | *ret = USER_DIRECTORY; |
1304 | } | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
70a5db58 | 1309 | static int home_create(UserRecord *h, UserRecord **ret_home) { |
7b78db28 | 1310 | _cleanup_(strv_free_erasep) char **effective_passwords = NULL; |
a74e2e44 | 1311 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
70a5db58 | 1312 | _cleanup_(user_record_unrefp) UserRecord *new_home = NULL; |
7b78db28 | 1313 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
1dfe5de0 LP |
1314 | UserStorage new_storage = _USER_STORAGE_INVALID; |
1315 | const char *new_fs = NULL; | |
70a5db58 LP |
1316 | int r; |
1317 | ||
1318 | assert(h); | |
1319 | ||
1320 | if (!h->user_name) | |
1321 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks name, refusing."); | |
1322 | if (!uid_is_valid(h->uid)) | |
1323 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks UID, refusing."); | |
1324 | ||
7b78db28 | 1325 | r = user_record_compile_effective_passwords(h, &cache, &effective_passwords); |
70a5db58 LP |
1326 | if (r < 0) |
1327 | return r; | |
1328 | ||
1329 | r = user_record_test_home_directory_and_warn(h); | |
1330 | if (r < 0) | |
1331 | return r; | |
1332 | if (r != USER_TEST_ABSENT) | |
1333 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "Home directory %s already exists, refusing.", user_record_home_directory(h)); | |
1334 | ||
70a5db58 | 1335 | if (h->storage < 0) { |
1dfe5de0 | 1336 | r = determine_default_storage(&new_storage); |
70a5db58 | 1337 | if (r < 0) |
1dfe5de0 LP |
1338 | return r; |
1339 | } | |
70a5db58 | 1340 | |
1dfe5de0 LP |
1341 | if ((h->storage == USER_LUKS || |
1342 | (h->storage < 0 && new_storage == USER_LUKS)) && | |
1343 | !h->file_system_type) | |
1344 | new_fs = getenv("SYSTEMD_HOME_DEFAULT_FILE_SYSTEM_TYPE"); | |
70a5db58 | 1345 | |
1dfe5de0 | 1346 | if (new_storage >= 0 || new_fs) { |
70a5db58 LP |
1347 | r = user_record_add_binding( |
1348 | h, | |
1349 | new_storage, | |
1350 | NULL, | |
1351 | SD_ID128_NULL, | |
1352 | SD_ID128_NULL, | |
1353 | SD_ID128_NULL, | |
1354 | NULL, | |
1355 | NULL, | |
1356 | UINT64_MAX, | |
1dfe5de0 | 1357 | new_fs, |
70a5db58 LP |
1358 | NULL, |
1359 | UID_INVALID, | |
1360 | GID_INVALID); | |
1361 | if (r < 0) | |
1362 | return log_error_errno(r, "Failed to change storage type to LUKS: %m"); | |
70a5db58 LP |
1363 | } |
1364 | ||
1365 | r = user_record_test_image_path_and_warn(h); | |
1366 | if (r < 0) | |
1367 | return r; | |
1368 | if (!IN_SET(r, USER_TEST_ABSENT, USER_TEST_UNDEFINED, USER_TEST_MAYBE)) | |
1369 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), "Image path %s already exists, refusing.", user_record_image_path(h)); | |
1370 | ||
1371 | switch (user_record_storage(h)) { | |
1372 | ||
1373 | case USER_LUKS: | |
bc5890c6 | 1374 | r = home_create_luks(h, &setup, &cache, effective_passwords, &new_home); |
70a5db58 LP |
1375 | break; |
1376 | ||
1377 | case USER_DIRECTORY: | |
1378 | case USER_SUBVOLUME: | |
e1aeaf27 | 1379 | r = home_create_directory_or_subvolume(h, &setup, &new_home); |
70a5db58 LP |
1380 | break; |
1381 | ||
1382 | case USER_FSCRYPT: | |
655807f5 | 1383 | r = home_create_fscrypt(h, &setup, effective_passwords, &new_home); |
70a5db58 LP |
1384 | break; |
1385 | ||
1386 | case USER_CIFS: | |
a74e2e44 | 1387 | r = home_create_cifs(h, &setup, &new_home); |
70a5db58 LP |
1388 | break; |
1389 | ||
1390 | default: | |
1391 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), | |
1392 | "Creating home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1393 | } | |
1394 | if (r < 0) | |
1395 | return r; | |
1396 | ||
1397 | if (user_record_equal(h, new_home)) { | |
1398 | *ret_home = NULL; | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | *ret_home = TAKE_PTR(new_home); | |
1403 | return 1; | |
1404 | } | |
1405 | ||
1406 | static int home_remove(UserRecord *h) { | |
1407 | bool deleted = false; | |
1408 | const char *ip, *hd; | |
1409 | int r; | |
1410 | ||
1411 | assert(h); | |
1412 | ||
1413 | if (!h->user_name) | |
1414 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks user name, refusing."); | |
1415 | if (!IN_SET(user_record_storage(h), USER_LUKS, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT, USER_CIFS)) | |
1416 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Removing home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1417 | ||
1418 | hd = user_record_home_directory(h); | |
1419 | ||
1420 | r = user_record_test_home_directory_and_warn(h); | |
1421 | if (r < 0) | |
1422 | return r; | |
1423 | if (r == USER_TEST_MOUNTED) | |
1424 | return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Directory %s is still mounted, refusing.", hd); | |
1425 | ||
1426 | assert(hd); | |
1427 | ||
1428 | r = user_record_test_image_path_and_warn(h); | |
1429 | if (r < 0) | |
1430 | return r; | |
1431 | ||
1432 | ip = user_record_image_path(h); | |
1433 | ||
1434 | switch (user_record_storage(h)) { | |
1435 | ||
1436 | case USER_LUKS: { | |
1437 | struct stat st; | |
1438 | ||
1439 | assert(ip); | |
1440 | ||
1441 | if (stat(ip, &st) < 0) { | |
6b8664cb | 1442 | if (errno != ENOENT) |
80ace4f2 | 1443 | return log_error_errno(errno, "Failed to stat() %s: %m", ip); |
70a5db58 LP |
1444 | |
1445 | } else { | |
1446 | if (S_ISREG(st.st_mode)) { | |
1447 | if (unlink(ip) < 0) { | |
1448 | if (errno != ENOENT) | |
1449 | return log_error_errno(errno, "Failed to remove %s: %m", ip); | |
86019efa LP |
1450 | } else { |
1451 | _cleanup_free_ char *parent = NULL; | |
1452 | ||
70a5db58 LP |
1453 | deleted = true; |
1454 | ||
86019efa LP |
1455 | r = path_extract_directory(ip, &parent); |
1456 | if (r < 0) | |
1457 | log_debug_errno(r, "Failed to determine parent directory of '%s': %m", ip); | |
1458 | else { | |
1459 | r = fsync_path_at(AT_FDCWD, parent); | |
1460 | if (r < 0) | |
1461 | log_debug_errno(r, "Failed to synchronize disk after deleting '%s', ignoring: %m", ip); | |
1462 | } | |
1463 | } | |
1464 | ||
70a5db58 LP |
1465 | } else if (S_ISBLK(st.st_mode)) |
1466 | log_info("Not removing file system on block device %s.", ip); | |
1467 | else | |
1468 | return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK), "Image file %s is neither block device, nor regular, refusing removal.", ip); | |
1469 | } | |
1470 | ||
1471 | break; | |
1472 | } | |
1473 | ||
1474 | case USER_SUBVOLUME: | |
1475 | case USER_DIRECTORY: | |
1476 | case USER_FSCRYPT: | |
1477 | assert(ip); | |
1478 | ||
86019efa | 1479 | r = rm_rf(ip, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME|REMOVE_SYNCFS); |
70a5db58 LP |
1480 | if (r < 0) { |
1481 | if (r != -ENOENT) | |
1482 | return log_warning_errno(r, "Failed to remove %s: %m", ip); | |
1483 | } else | |
1484 | deleted = true; | |
1485 | ||
1486 | /* If the image path and the home directory are the same invalidate the home directory, so | |
1487 | * that we don't remove it anymore */ | |
1488 | if (path_equal(ip, hd)) | |
1489 | hd = NULL; | |
1490 | ||
1491 | break; | |
1492 | ||
1493 | case USER_CIFS: | |
1494 | /* Nothing else to do here: we won't remove remote stuff. */ | |
1495 | log_info("Not removing home directory on remote server."); | |
1496 | break; | |
1497 | ||
1498 | default: | |
04499a70 | 1499 | assert_not_reached(); |
70a5db58 LP |
1500 | } |
1501 | ||
1502 | if (hd) { | |
1503 | if (rmdir(hd) < 0) { | |
1504 | if (errno != ENOENT) | |
1505 | return log_error_errno(errno, "Failed to remove %s, ignoring: %m", hd); | |
1506 | } else | |
1507 | deleted = true; | |
1508 | } | |
1509 | ||
86019efa LP |
1510 | if (deleted) { |
1511 | if (user_record_drop_caches(h)) | |
1512 | drop_caches_now(); | |
1513 | ||
70a5db58 | 1514 | log_info("Everything completed."); |
86019efa | 1515 | } else |
e4ff0393 FS |
1516 | return log_notice_errno(SYNTHETIC_ERRNO(EALREADY), |
1517 | "Nothing to remove."); | |
70a5db58 LP |
1518 | |
1519 | return 0; | |
1520 | } | |
1521 | ||
e1df968b | 1522 | static int home_validate_update(UserRecord *h, HomeSetup *setup, HomeSetupFlags *flags) { |
70a5db58 LP |
1523 | bool has_mount = false; |
1524 | int r; | |
1525 | ||
1526 | assert(h); | |
1527 | assert(setup); | |
1528 | ||
1529 | if (!h->user_name) | |
1530 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks user name, refusing."); | |
1531 | if (!uid_is_valid(h->uid)) | |
1532 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record lacks UID, refusing."); | |
1533 | if (!IN_SET(user_record_storage(h), USER_LUKS, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT, USER_CIFS)) | |
1534 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Processing home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1535 | ||
1536 | r = user_record_test_home_directory_and_warn(h); | |
1537 | if (r < 0) | |
1538 | return r; | |
1539 | ||
1540 | has_mount = r == USER_TEST_MOUNTED; | |
1541 | ||
1542 | r = user_record_test_image_path_and_warn(h); | |
1543 | if (r < 0) | |
1544 | return r; | |
1545 | if (r == USER_TEST_ABSENT) | |
1546 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "Image path %s does not exist", user_record_image_path(h)); | |
1547 | ||
1548 | switch (user_record_storage(h)) { | |
1549 | ||
1550 | case USER_DIRECTORY: | |
1551 | case USER_SUBVOLUME: | |
1552 | case USER_FSCRYPT: | |
1553 | case USER_CIFS: | |
1554 | break; | |
1555 | ||
1556 | case USER_LUKS: { | |
e1ab6635 | 1557 | r = home_get_state_luks(h, setup); |
70a5db58 LP |
1558 | if (r < 0) |
1559 | return r; | |
1560 | if ((r > 0) != has_mount) | |
1561 | return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Home mount incompletely set up."); | |
1562 | ||
1563 | break; | |
1564 | } | |
1565 | ||
1566 | default: | |
04499a70 | 1567 | assert_not_reached(); |
70a5db58 LP |
1568 | } |
1569 | ||
e1df968b LP |
1570 | if (flags) |
1571 | SET_FLAG(*flags, HOME_SETUP_ALREADY_ACTIVATED, has_mount); | |
1572 | ||
70a5db58 LP |
1573 | return has_mount; /* return true if the home record is already active */ |
1574 | } | |
1575 | ||
1576 | static int home_update(UserRecord *h, UserRecord **ret) { | |
1577 | _cleanup_(user_record_unrefp) UserRecord *new_home = NULL, *header_home = NULL, *embedded_home = NULL; | |
66aa51f8 | 1578 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
7b78db28 | 1579 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
e1df968b | 1580 | HomeSetupFlags flags = 0; |
70a5db58 LP |
1581 | int r; |
1582 | ||
1583 | assert(h); | |
1584 | assert(ret); | |
1585 | ||
7b78db28 | 1586 | r = user_record_authenticate(h, h, &cache, /* strict_verify= */ true); |
70a5db58 LP |
1587 | if (r < 0) |
1588 | return r; | |
c8f145ad | 1589 | assert(r > 0); /* Insist that a password was verified */ |
70a5db58 | 1590 | |
e1df968b | 1591 | r = home_validate_update(h, &setup, &flags); |
70a5db58 LP |
1592 | if (r < 0) |
1593 | return r; | |
1594 | ||
c00b2ddc | 1595 | r = home_setup(h, flags, &setup, &cache, &header_home); |
70a5db58 LP |
1596 | if (r < 0) |
1597 | return r; | |
1598 | ||
7b78db28 | 1599 | r = home_load_embedded_identity(h, setup.root_fd, header_home, USER_RECONCILE_REQUIRE_NEWER, &cache, &embedded_home, &new_home); |
70a5db58 LP |
1600 | if (r < 0) |
1601 | return r; | |
1602 | ||
a8be0984 LP |
1603 | r = home_maybe_shift_uid(h, flags, &setup); |
1604 | if (r < 0) | |
1605 | return r; | |
1606 | ||
70a5db58 LP |
1607 | r = home_store_header_identity_luks(new_home, &setup, header_home); |
1608 | if (r < 0) | |
1609 | return r; | |
1610 | ||
1611 | r = home_store_embedded_identity(new_home, setup.root_fd, h->uid, embedded_home); | |
1612 | if (r < 0) | |
1613 | return r; | |
1614 | ||
1615 | r = home_extend_embedded_identity(new_home, h, &setup); | |
1616 | if (r < 0) | |
1617 | return r; | |
1618 | ||
1619 | r = home_sync_and_statfs(setup.root_fd, NULL); | |
1620 | if (r < 0) | |
1621 | return r; | |
1622 | ||
66aa51f8 | 1623 | r = home_setup_done(&setup); |
70a5db58 LP |
1624 | if (r < 0) |
1625 | return r; | |
1626 | ||
1627 | log_info("Everything completed."); | |
1628 | ||
1629 | *ret = TAKE_PTR(new_home); | |
1630 | return 0; | |
1631 | } | |
1632 | ||
d357b80d | 1633 | static int home_resize(UserRecord *h, bool automatic, UserRecord **ret) { |
66aa51f8 | 1634 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
7b78db28 | 1635 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
e1df968b | 1636 | HomeSetupFlags flags = 0; |
70a5db58 LP |
1637 | int r; |
1638 | ||
1639 | assert(h); | |
1640 | assert(ret); | |
1641 | ||
1642 | if (h->disk_size == UINT64_MAX) | |
1643 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No target size specified, refusing."); | |
1644 | ||
d357b80d LP |
1645 | if (automatic) |
1646 | /* In automatic mode don't want to ask the user for the password, hence load it from the kernel keyring */ | |
1647 | password_cache_load_keyring(h, &cache); | |
1648 | else { | |
1649 | /* In manual mode let's ensure the user is fully authenticated */ | |
1650 | r = user_record_authenticate(h, h, &cache, /* strict_verify= */ true); | |
1651 | if (r < 0) | |
1652 | return r; | |
1653 | assert(r > 0); /* Insist that a password was verified */ | |
1654 | } | |
70a5db58 | 1655 | |
e1df968b | 1656 | r = home_validate_update(h, &setup, &flags); |
70a5db58 LP |
1657 | if (r < 0) |
1658 | return r; | |
1659 | ||
d357b80d LP |
1660 | /* In automatic mode let's skip syncing identities, because we can't validate them, since we can't |
1661 | * ask the user for reauthentication */ | |
1662 | if (automatic) | |
1663 | flags |= HOME_SETUP_RESIZE_DONT_SYNC_IDENTITIES; | |
1664 | ||
70a5db58 LP |
1665 | switch (user_record_storage(h)) { |
1666 | ||
1667 | case USER_LUKS: | |
c00b2ddc | 1668 | return home_resize_luks(h, flags, &setup, &cache, ret); |
70a5db58 LP |
1669 | |
1670 | case USER_DIRECTORY: | |
1671 | case USER_SUBVOLUME: | |
1672 | case USER_FSCRYPT: | |
c00b2ddc | 1673 | return home_resize_directory(h, flags, &setup, &cache, ret); |
70a5db58 LP |
1674 | |
1675 | default: | |
1676 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Resizing home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | static int home_passwd(UserRecord *h, UserRecord **ret_home) { | |
1681 | _cleanup_(user_record_unrefp) UserRecord *header_home = NULL, *embedded_home = NULL, *new_home = NULL; | |
7b78db28 | 1682 | _cleanup_(strv_free_erasep) char **effective_passwords = NULL; |
66aa51f8 | 1683 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
7b78db28 | 1684 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
e1df968b | 1685 | HomeSetupFlags flags = 0; |
70a5db58 LP |
1686 | int r; |
1687 | ||
1688 | assert(h); | |
1689 | assert(ret_home); | |
1690 | ||
1691 | if (!IN_SET(user_record_storage(h), USER_LUKS, USER_DIRECTORY, USER_SUBVOLUME, USER_FSCRYPT)) | |
1692 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Changing password of home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1693 | ||
7b78db28 | 1694 | r = user_record_compile_effective_passwords(h, &cache, &effective_passwords); |
70a5db58 LP |
1695 | if (r < 0) |
1696 | return r; | |
1697 | ||
e1df968b | 1698 | r = home_validate_update(h, &setup, &flags); |
70a5db58 LP |
1699 | if (r < 0) |
1700 | return r; | |
1701 | ||
c00b2ddc | 1702 | r = home_setup(h, flags, &setup, &cache, &header_home); |
70a5db58 LP |
1703 | if (r < 0) |
1704 | return r; | |
1705 | ||
7b78db28 | 1706 | r = home_load_embedded_identity(h, setup.root_fd, header_home, USER_RECONCILE_REQUIRE_NEWER_OR_EQUAL, &cache, &embedded_home, &new_home); |
70a5db58 LP |
1707 | if (r < 0) |
1708 | return r; | |
1709 | ||
a8be0984 LP |
1710 | r = home_maybe_shift_uid(h, flags, &setup); |
1711 | if (r < 0) | |
1712 | return r; | |
1713 | ||
70a5db58 LP |
1714 | switch (user_record_storage(h)) { |
1715 | ||
1716 | case USER_LUKS: | |
d26cdde3 | 1717 | r = home_passwd_luks(h, flags, &setup, &cache, effective_passwords); |
70a5db58 LP |
1718 | if (r < 0) |
1719 | return r; | |
1720 | break; | |
1721 | ||
1722 | case USER_FSCRYPT: | |
7b78db28 | 1723 | r = home_passwd_fscrypt(h, &setup, &cache, effective_passwords); |
70a5db58 LP |
1724 | if (r < 0) |
1725 | return r; | |
1726 | break; | |
1727 | ||
1728 | default: | |
1729 | break; | |
1730 | } | |
1731 | ||
1732 | r = home_store_header_identity_luks(new_home, &setup, header_home); | |
1733 | if (r < 0) | |
1734 | return r; | |
1735 | ||
1736 | r = home_store_embedded_identity(new_home, setup.root_fd, h->uid, embedded_home); | |
1737 | if (r < 0) | |
1738 | return r; | |
1739 | ||
1740 | r = home_extend_embedded_identity(new_home, h, &setup); | |
1741 | if (r < 0) | |
1742 | return r; | |
1743 | ||
1744 | r = home_sync_and_statfs(setup.root_fd, NULL); | |
1745 | if (r < 0) | |
1746 | return r; | |
1747 | ||
66aa51f8 | 1748 | r = home_setup_done(&setup); |
70a5db58 LP |
1749 | if (r < 0) |
1750 | return r; | |
1751 | ||
1752 | log_info("Everything completed."); | |
1753 | ||
1754 | *ret_home = TAKE_PTR(new_home); | |
1755 | return 1; | |
1756 | } | |
1757 | ||
1758 | static int home_inspect(UserRecord *h, UserRecord **ret_home) { | |
1759 | _cleanup_(user_record_unrefp) UserRecord *header_home = NULL, *new_home = NULL; | |
66aa51f8 | 1760 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
7b78db28 | 1761 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
e1df968b | 1762 | HomeSetupFlags flags = 0; |
70a5db58 LP |
1763 | int r; |
1764 | ||
1765 | assert(h); | |
1766 | assert(ret_home); | |
1767 | ||
7b78db28 | 1768 | r = user_record_authenticate(h, h, &cache, /* strict_verify= */ false); |
70a5db58 LP |
1769 | if (r < 0) |
1770 | return r; | |
1771 | ||
e1df968b | 1772 | r = home_validate_update(h, &setup, &flags); |
70a5db58 LP |
1773 | if (r < 0) |
1774 | return r; | |
1775 | ||
c00b2ddc | 1776 | r = home_setup(h, flags, &setup, &cache, &header_home); |
70a5db58 LP |
1777 | if (r < 0) |
1778 | return r; | |
1779 | ||
7b78db28 | 1780 | r = home_load_embedded_identity(h, setup.root_fd, header_home, USER_RECONCILE_ANY, &cache, NULL, &new_home); |
70a5db58 LP |
1781 | if (r < 0) |
1782 | return r; | |
1783 | ||
1784 | r = home_extend_embedded_identity(new_home, h, &setup); | |
1785 | if (r < 0) | |
1786 | return r; | |
1787 | ||
66aa51f8 | 1788 | r = home_setup_done(&setup); |
70a5db58 LP |
1789 | if (r < 0) |
1790 | return r; | |
1791 | ||
1792 | log_info("Everything completed."); | |
1793 | ||
1794 | *ret_home = TAKE_PTR(new_home); | |
1795 | return 1; | |
1796 | } | |
1797 | ||
1798 | static int home_lock(UserRecord *h) { | |
fc032ae1 | 1799 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
70a5db58 LP |
1800 | int r; |
1801 | ||
1802 | assert(h); | |
1803 | ||
1804 | if (!h->user_name) | |
1805 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record incomplete, refusing."); | |
1806 | if (user_record_storage(h) != USER_LUKS) | |
1807 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Locking home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1808 | ||
1809 | r = user_record_test_home_directory_and_warn(h); | |
1810 | if (r < 0) | |
1811 | return r; | |
1812 | if (r != USER_TEST_MOUNTED) | |
1813 | return log_error_errno(SYNTHETIC_ERRNO(ENOEXEC), "Home directory of %s is not mounted, can't lock.", h->user_name); | |
1814 | ||
fc032ae1 | 1815 | r = home_lock_luks(h, &setup); |
70a5db58 LP |
1816 | if (r < 0) |
1817 | return r; | |
1818 | ||
1819 | log_info("Everything completed."); | |
1820 | return 1; | |
1821 | } | |
1822 | ||
1823 | static int home_unlock(UserRecord *h) { | |
fc032ae1 | 1824 | _cleanup_(home_setup_done) HomeSetup setup = HOME_SETUP_INIT; |
7b78db28 | 1825 | _cleanup_(password_cache_free) PasswordCache cache = {}; |
70a5db58 LP |
1826 | int r; |
1827 | ||
1828 | assert(h); | |
1829 | ||
1830 | if (!h->user_name) | |
1831 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "User record incomplete, refusing."); | |
1832 | if (user_record_storage(h) != USER_LUKS) | |
1833 | return log_error_errno(SYNTHETIC_ERRNO(ENOTTY), "Unlocking home directories of type '%s' currently not supported.", user_storage_to_string(user_record_storage(h))); | |
1834 | ||
1835 | /* Note that we don't check if $HOME is actually mounted, since we want to avoid disk accesses on | |
1836 | * that mount until we have resumed the device. */ | |
1837 | ||
7b78db28 | 1838 | r = user_record_authenticate(h, h, &cache, /* strict_verify= */ false); |
70a5db58 LP |
1839 | if (r < 0) |
1840 | return r; | |
1841 | ||
fc032ae1 | 1842 | r = home_unlock_luks(h, &setup, &cache); |
70a5db58 LP |
1843 | if (r < 0) |
1844 | return r; | |
1845 | ||
1846 | log_info("Everything completed."); | |
1847 | return 1; | |
1848 | } | |
1849 | ||
1850 | static int run(int argc, char *argv[]) { | |
1851 | _cleanup_(user_record_unrefp) UserRecord *home = NULL, *new_home = NULL; | |
1852 | _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; | |
1853 | _cleanup_(fclosep) FILE *opened_file = NULL; | |
1854 | unsigned line = 0, column = 0; | |
1855 | const char *json_path = NULL; | |
1856 | FILE *json_file; | |
1857 | usec_t start; | |
1858 | int r; | |
1859 | ||
1860 | start = now(CLOCK_MONOTONIC); | |
1861 | ||
d2acb93d | 1862 | log_setup(); |
70a5db58 | 1863 | |
30f19400 LP |
1864 | cryptsetup_enable_logging(NULL); |
1865 | ||
70a5db58 LP |
1866 | umask(0022); |
1867 | ||
1868 | if (argc < 2 || argc > 3) | |
1869 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes one or two arguments."); | |
1870 | ||
1871 | if (argc > 2) { | |
1872 | json_path = argv[2]; | |
1873 | ||
1874 | opened_file = fopen(json_path, "re"); | |
1875 | if (!opened_file) | |
1876 | return log_error_errno(errno, "Failed to open %s: %m", json_path); | |
1877 | ||
1878 | json_file = opened_file; | |
1879 | } else { | |
1880 | json_path = "<stdin>"; | |
1881 | json_file = stdin; | |
1882 | } | |
1883 | ||
1884 | r = json_parse_file(json_file, json_path, JSON_PARSE_SENSITIVE, &v, &line, &column); | |
1885 | if (r < 0) | |
1886 | return log_error_errno(r, "[%s:%u:%u] Failed to parse JSON data: %m", json_path, line, column); | |
1887 | ||
1888 | home = user_record_new(); | |
1889 | if (!home) | |
1890 | return log_oom(); | |
1891 | ||
bfc0cc1a | 1892 | r = user_record_load(home, v, USER_RECORD_LOAD_FULL|USER_RECORD_LOG|USER_RECORD_PERMISSIVE); |
70a5db58 LP |
1893 | if (r < 0) |
1894 | return r; | |
1895 | ||
1896 | /* Well known return values of these operations, that systemd-homed knows and converts to proper D-Bus errors: | |
1897 | * | |
162392b7 ZJS |
1898 | * EMSGSIZE → file systems of this type cannot be shrunk |
1899 | * ETXTBSY → file systems of this type can only be shrunk offline | |
70a5db58 LP |
1900 | * ERANGE → file system size too small |
1901 | * ENOLINK → system does not support selected storage backend | |
1902 | * EPROTONOSUPPORT → system does not support selected file system | |
1903 | * ENOTTY → operation not support on this storage | |
1904 | * ESOCKTNOSUPPORT → operation not support on this file system | |
1905 | * ENOKEY → password incorrect (or not sufficient, or not supplied) | |
87d7893c | 1906 | * EREMOTEIO → recovery key incorrect (or not sufficeint, or not supplied — only if no passwords defined) |
70a5db58 | 1907 | * EBADSLT → similar, but PKCS#11 device is defined and might be able to provide password, if it was plugged in which it is not |
7b78db28 | 1908 | * ENOANO → suitable PKCS#11/FIDO2 device found, but PIN is missing to unlock it |
70a5db58 | 1909 | * ERFKILL → suitable PKCS#11 device found, but OK to ask for on-device interactive authentication not given |
7b78db28 | 1910 | * EMEDIUMTYPE → suitable FIDO2 device found, but OK to ask for user presence not given |
17e7561a | 1911 | * ENOCSI → suitable FIDO2 device found, but OK to ask for user verification not given |
7b78db28 LP |
1912 | * ENOSTR → suitable FIDO2 device found, but user didn't react to action request on token quickly enough |
1913 | * EOWNERDEAD → suitable PKCS#11/FIDO2 device found, but its PIN is locked | |
1914 | * ENOLCK → suitable PKCS#11/FIDO2 device found, but PIN incorrect | |
70a5db58 LP |
1915 | * ETOOMANYREFS → suitable PKCS#11 device found, but PIN incorrect, and only few tries left |
1916 | * EUCLEAN → suitable PKCS#11 device found, but PIN incorrect, and only one try left | |
1917 | * EBUSY → file system is currently active | |
1918 | * ENOEXEC → file system is currently not active | |
1919 | * ENOSPC → not enough disk space for operation | |
cbffdcec | 1920 | * EKEYREVOKED → user record has not suitable hashed password or pkcs#11 entry, we cannot authenticate |
2aaf565a | 1921 | * EADDRINUSE → home image is already used elsewhere (lock taken) |
70a5db58 LP |
1922 | */ |
1923 | ||
1924 | if (streq(argv[1], "activate")) | |
1925 | r = home_activate(home, &new_home); | |
1926 | else if (streq(argv[1], "deactivate")) | |
1927 | r = home_deactivate(home, false); | |
1928 | else if (streq(argv[1], "deactivate-force")) | |
1929 | r = home_deactivate(home, true); | |
1930 | else if (streq(argv[1], "create")) | |
1931 | r = home_create(home, &new_home); | |
1932 | else if (streq(argv[1], "remove")) | |
1933 | r = home_remove(home); | |
1934 | else if (streq(argv[1], "update")) | |
1935 | r = home_update(home, &new_home); | |
d357b80d LP |
1936 | else if (streq(argv[1], "resize")) /* Resize on user request */ |
1937 | r = home_resize(home, false, &new_home); | |
1938 | else if (streq(argv[1], "resize-auto")) /* Automatic resize */ | |
1939 | r = home_resize(home, true, &new_home); | |
70a5db58 LP |
1940 | else if (streq(argv[1], "passwd")) |
1941 | r = home_passwd(home, &new_home); | |
1942 | else if (streq(argv[1], "inspect")) | |
1943 | r = home_inspect(home, &new_home); | |
1944 | else if (streq(argv[1], "lock")) | |
1945 | r = home_lock(home); | |
1946 | else if (streq(argv[1], "unlock")) | |
1947 | r = home_unlock(home); | |
1948 | else | |
1949 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown verb '%s'.", argv[1]); | |
87d7893c | 1950 | if (IN_SET(r, -ENOKEY, -EREMOTEIO) && !strv_isempty(home->password) ) { /* There were passwords specified but they were incorrect */ |
70a5db58 LP |
1951 | usec_t end, n, d; |
1952 | ||
1953 | /* Make sure bad password replies always take at least 3s, and if longer multiples of 3s, so | |
1954 | * that it's not clear how long we actually needed for our calculations. */ | |
1955 | n = now(CLOCK_MONOTONIC); | |
1956 | assert(n >= start); | |
1957 | ||
1958 | d = usec_sub_unsigned(n, start); | |
1959 | if (d > BAD_PASSWORD_DELAY_USEC) | |
1960 | end = start + DIV_ROUND_UP(d, BAD_PASSWORD_DELAY_USEC) * BAD_PASSWORD_DELAY_USEC; | |
1961 | else | |
1962 | end = start + BAD_PASSWORD_DELAY_USEC; | |
1963 | ||
1964 | if (n < end) | |
1965 | (void) usleep(usec_sub_unsigned(end, n)); | |
1966 | } | |
1967 | if (r < 0) | |
1968 | return r; | |
1969 | ||
1970 | /* We always pass the new record back, regardless if it changed or not. This allows our caller to | |
1971 | * prepare a fresh record, send to us, and only if it works use it without having to keep a local | |
1972 | * copy. */ | |
1973 | if (new_home) | |
1974 | json_variant_dump(new_home->json, JSON_FORMAT_NEWLINE, stdout, NULL); | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | DEFINE_MAIN_FUNCTION(run); |