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- Committer: Björn Påhlsson
- Date: 2011-11-28 07:39:48 UTC
- mfrom: (505.3.16 client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: belorn@recompile.se-20111128073948-xd69945uliwv2y61
merge
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
1301
1302
}
1302
1303
return 0;
1303
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1304
1309
return 1;
1305
1310
}
1306
1311
1388
1393
} else {
1389
1394
int devnull = open("/dev/null", O_RDONLY);
1390
1395
for(int i = 0; i < numhooks; i++){
1391
direntry = direntries[0];
1396
direntry = direntries[i];
1392
1397
char *fullname = NULL;
1393
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1394
1399
if(ret < 0){
1395
1400
perror_plus("asprintf");
1396
1401
continue;
1397
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1398
1407
pid_t hook_pid = fork();
1399
1408
if(hook_pid == 0){
1400
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
fprintf_plus(stderr, "Child: getuid() = %d\n", getuid());
1435
fprintf_plus(stderr, "Child: geteuid() = %d\n", geteuid());
1401
1436
dup2(devnull, STDIN_FILENO);
1402
1437
close(devnull);
1403
1438
dup2(STDERR_FILENO, STDOUT_FILENO);
1404
1439
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1405
1440
if(ret == -1){
1406
1441
perror_plus("setenv");
1407
return false;
1442
_exit(EX_OSERR);
1408
1443
}
1409
1444
ret = setenv("DEVICE", interface, 1);
1410
1445
if(ret == -1){
1411
1446
perror_plus("setenv");
1412
return false;
1447
_exit(EX_OSERR);
1413
1448
}
1414
1449
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1415
1450
if(ret == -1){
1416
1451
perror_plus("setenv");
1417
return false;
1452
_exit(EX_OSERR);
1418
1453
}
1419
1454
ret = setenv("MODE", mode, 1);
1420
1455
if(ret == -1){
1421
1456
perror_plus("setenv");
1422
return false;
1457
_exit(EX_OSERR);
1423
1458
}
1424
1459
char *delaystring;
1425
1460
ret = asprintf(&delaystring, "%f", delay);
1426
1461
if(ret == -1){
1427
1462
perror_plus("asprintf");
1428
return false;
1463
_exit(EX_OSERR);
1429
1464
}
1430
1465
ret = setenv("DELAY", delaystring, 1);
1431
1466
if(ret == -1){
1432
1467
free(delaystring);
1433
1468
perror_plus("setenv");
1434
return false;
1469
_exit(EX_OSERR);
1435
1470
}
1436
1471
free(delaystring);
1437
1472
ret = execl(fullname, direntry->d_name, mode, NULL);
1465
1500
}
1466
1501
}
1467
1502
free(fullname);
1468
if(quit_now){
1469
break;
1503
if(debug){
1504
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1505
direntry->d_name);
1470
1506
}
1471
1507
}
1472
1508
close(devnull);
1672
1708
{
1673
1709
/* Work around Debian bug #633582:
1674
1710
<http://bugs.debian.org/633582> */
1675
struct stat st;
1676
1711
1677
1712
/* Re-raise priviliges */
1678
1713
errno = 0;
1679
1714
ret = seteuid(0);
1680
1715
if(ret == -1){
1681
1716
perror_plus("seteuid");
1682
}
1683
1684
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1685
int seckey_fd = open(seckey, O_RDONLY);
1686
if(seckey_fd == -1){
1687
perror_plus("open");
1688
} else {
1689
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1690
if(ret == -1){
1691
perror_plus("fstat");
1692
} else {
1693
if(S_ISREG(st.st_mode)
1694
and st.st_uid == 0 and st.st_gid == 0){
1695
ret = fchown(seckey_fd, uid, gid);
1696
if(ret == -1){
1697
perror_plus("fchown");
1698
}
1699
}
1700
}
1701
TEMP_FAILURE_RETRY(close(seckey_fd));
1702
}
1703
}
1704
1705
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1706
int pubkey_fd = open(pubkey, O_RDONLY);
1707
if(pubkey_fd == -1){
1708
perror_plus("open");
1709
} else {
1710
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1711
if(ret == -1){
1712
perror_plus("fstat");
1713
} else {
1714
if(S_ISREG(st.st_mode)
1715
and st.st_uid == 0 and st.st_gid == 0){
1716
ret = fchown(pubkey_fd, uid, gid);
1717
if(ret == -1){
1718
perror_plus("fchown");
1719
}
1720
}
1721
}
1722
TEMP_FAILURE_RETRY(close(pubkey_fd));
1723
}
1724
}
1725
1726
/* Lower privileges */
1727
errno = 0;
1728
ret = seteuid(uid);
1729
if(ret == -1){
1730
perror_plus("seteuid");
1717
} else {
1718
struct stat st;
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode)
1730
and st.st_uid == 0 and st.st_gid == 0){
1731
ret = fchown(seckey_fd, uid, gid);
1732
if(ret == -1){
1733
perror_plus("fchown");
1734
}
1735
}
1736
}
1737
TEMP_FAILURE_RETRY(close(seckey_fd));
1738
}
1739
}
1740
1741
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1742
int pubkey_fd = open(pubkey, O_RDONLY);
1743
if(pubkey_fd == -1){
1744
perror_plus("open");
1745
} else {
1746
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1747
if(ret == -1){
1748
perror_plus("fstat");
1749
} else {
1750
if(S_ISREG(st.st_mode)
1751
and st.st_uid == 0 and st.st_gid == 0){
1752
ret = fchown(pubkey_fd, uid, gid);
1753
if(ret == -1){
1754
perror_plus("fchown");
1755
}
1756
}
1757
}
1758
TEMP_FAILURE_RETRY(close(pubkey_fd));
1759
}
1760
}
1761
1762
/* Lower privileges */
1763
errno = 0;
1764
ret = seteuid(uid);
1765
if(ret == -1){
1766
perror_plus("seteuid");
1767
}
1731
1768
}
1732
1769
}
1733
1770
1734
1771
/* Run network hooks */
1735
{
1736
/* Re-raise priviliges */
1737
errno = 0;
1738
ret = seteuid(0);
1739
if(ret == -1){
1740
perror_plus("seteuid");
1741
}
1742
if(not run_network_hooks("start", interface, delay)){
1743
goto end;
1744
}
1745
/* Lower privileges */
1746
errno = 0;
1747
ret = seteuid(uid);
1748
if(ret == -1){
1749
perror_plus("seteuid");
1750
}
1772
if(not run_network_hooks("start", interface, delay)){
1773
goto end;
1751
1774
}
1752
1775
1753
1776
if(not debug){
2192
2215
if(gpgme_initialized){
2193
2216
gpgme_release(mc.ctx);
2194
2217
}
2195
2218
2196
2219
/* Cleans up the circular linked list of Mandos servers the client
2197
2220
has seen */
2198
2221
if(mc.current_server != NULL){
2204
2227
}
2205
2228
}
2206
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2207
2233
/* Re-raise priviliges */
2208
2234
{
2209
2235
errno = 0;
2211
2237
if(ret == -1){
2212
2238
perror_plus("seteuid");
2213
2239
}
2214
/* Run network hooks */
2215
if(not run_network_hooks("stop", interface, delay)){
2216
goto end;
2217
}
2218
2240
2219
2241
/* Take down the network interface */
2220
2242
if(take_down_interface and geteuid() == 0){
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