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