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- Committer: Teddy Hogeborn
- Date: 2014-06-22 02:19:30 UTC
- Revision ID: teddy@recompile.se-20140622021930-icl7h4cm97blhjml
mandos-keygen: Generate "checker" option to use SSH fingerprints.
To turn this off, use a new "--no-ssh" option to mandos-keygen.
* INSTALL (Mandos Server, Mandos Client): Document new suggested
installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
"mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
(mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
called "Faking ping
replies?" to address new
default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
behavior of
mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
"sec*", since no such files may exist.
(password mode): Scan for SSH key fingerprints and output as new
"checker" and "ssh_fingerprint" options, unless new
"--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
(OPTIONS/--no-ssh): New.
(SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
possibility of using SSH key
fingerprints for checking.
To turn this off, use a new "--no-ssh" option to mandos-keygen.
* INSTALL (Mandos Server, Mandos Client): Document new suggested
installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
"mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
(mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
called "Faking ping
replies?" to address new
default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
behavior of
mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
"sec*", since no such files may exist.
(password mode): Scan for SSH key fingerprints and output as new
"checker" and "ssh_fingerprint" options, unless new
"--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
(OPTIONS/--no-ssh): New.
(SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
possibility of using SSH key
fingerprints for checking.
- files added:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
180
185
perror(print_text);
181
186
}
182
187
183
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
189
int fprintf_plus(FILE *stream, const char *format, ...){
185
190
va_list ap;
186
191
va_start (ap, format);
187
192
188
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
194
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
196
}
192
197
193
198
/*
195
200
* bytes. "buffer_capacity" is how much is currently allocated,
196
201
* "buffer_length" is how much is already used.
197
202
*/
203
__attribute__((nonnull, warn_unused_result))
198
204
size_t incbuffer(char **buffer, size_t buffer_length,
199
205
size_t buffer_capacity){
200
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
203
213
return 0;
204
214
}
215
*buffer = new_buf;
205
216
buffer_capacity += BUFFER_SIZE;
206
217
}
207
218
return buffer_capacity;
208
219
}
209
220
210
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
211
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
224
int af, server **current_server){
213
225
int ret;
224
236
perror_plus("strdup");
225
237
return false;
226
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
227
244
/* Special case of first server */
228
245
if(*current_server == NULL){
229
246
new_server->next = new_server;
230
247
new_server->prev = new_server;
231
248
*current_server = new_server;
232
/* Place the new server last in the list */
233
249
} else {
250
/* Place the new server last in the list */
234
251
new_server->next = *current_server;
235
252
new_server->prev = (*current_server)->prev;
236
253
new_server->prev->next = new_server;
237
254
(*current_server)->prev = new_server;
238
255
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
256
return true;
245
257
}
246
258
247
259
/*
248
260
* Initialize GPGME.
249
261
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
262
__attribute__((nonnull, warn_unused_result))
263
static bool init_gpgme(const char * const seckey,
264
const char * const pubkey,
265
const char * const tempdir,
266
mandos_context *mc){
252
267
gpgme_error_t rc;
253
268
gpgme_engine_info_t engine_info;
254
269
255
270
/*
256
271
* Helper function to insert pub and seckey to the engine keyring.
257
272
*/
258
bool import_key(const char *filename){
273
bool import_key(const char * const filename){
259
274
int ret;
260
275
int fd;
261
276
gpgme_data_t pgp_data;
342
357
* Decrypt OpenPGP data.
343
358
* Returns -1 on error
344
359
*/
360
__attribute__((nonnull, warn_unused_result))
345
361
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
362
size_t crypto_size,
347
363
char **plaintext,
467
483
return plaintext_length;
468
484
}
469
485
470
static const char * safer_gnutls_strerror(int value){
486
__attribute__((warn_unused_result))
487
static const char *safer_gnutls_strerror(int value){
471
488
const char *ret = gnutls_strerror(value);
472
489
if(ret == NULL)
473
490
ret = "(unknown)";
475
492
}
476
493
477
494
/* GnuTLS log function callback */
495
__attribute__((nonnull))
478
496
static void debuggnutls(__attribute__((unused)) int level,
479
497
const char* string){
480
498
fprintf_plus(stderr, "GnuTLS: %s", string);
481
499
}
482
500
501
__attribute__((nonnull, warn_unused_result))
483
502
static int init_gnutls_global(const char *pubkeyfilename,
484
503
const char *seckeyfilename,
485
504
mandos_context *mc){
559
578
return -1;
560
579
}
561
580
581
__attribute__((nonnull, warn_unused_result))
562
582
static int init_gnutls_session(gnutls_session_t *session,
563
583
mandos_context *mc){
564
584
int ret;
621
641
__attribute__((unused)) const char *txt){}
622
642
623
643
/* Called when a Mandos server is found */
644
__attribute__((nonnull, warn_unused_result))
624
645
static int start_mandos_communication(const char *ip, in_port_t port,
625
646
AvahiIfIndex if_index,
626
647
int af, mandos_context *mc){
627
648
int ret, tcp_sd = -1;
628
649
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
650
struct sockaddr_storage to;
633
651
char *buffer = NULL;
634
652
char *decrypted_buffer = NULL;
635
653
size_t buffer_length = 0;
659
677
return -1;
660
678
}
661
679
680
/* If the interface is specified and we have a list of interfaces */
662
681
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
663
682
/* Check if the interface is one of the interfaces we are using */
664
683
bool match = false;
673
692
}
674
693
}
675
694
if(not match){
695
/* This interface does not match any in the list, so we don't
696
connect to the server */
676
697
if(debug){
677
698
char interface[IF_NAMESIZE];
678
699
if(if_indextoname((unsigned int)if_index, interface) == NULL){
713
734
714
735
memset(&to, 0, sizeof(to));
715
736
if(af == AF_INET6){
716
to.in6.sin6_family = (sa_family_t)af;
717
ret = inet_pton(af, ip, &to.in6.sin6_addr);
737
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
738
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
718
739
} else { /* IPv4 */
719
to.in.sin_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in.sin_addr);
740
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
721
742
}
722
743
if(ret < 0 ){
723
744
int e = errno;
732
753
goto mandos_end;
733
754
}
734
755
if(af == AF_INET6){
735
to.in6.sin6_port = htons(port);
736
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
737
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
738
-Wunreachable-code*/
756
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
757
if(IN6_IS_ADDR_LINKLOCAL
758
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
739
759
if(if_index == AVAHI_IF_UNSPEC){
740
760
fprintf_plus(stderr, "An IPv6 link-local address is"
741
761
" incomplete without a network interface\n");
743
763
goto mandos_end;
744
764
}
745
765
/* Set the network interface number as scope */
746
to.in6.sin6_scope_id = (uint32_t)if_index;
766
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
747
767
}
748
768
} else {
749
to.in.sin_port = htons(port); /* Spurious warnings from
750
-Wconversion and
751
-Wunreachable-code */
769
((struct sockaddr_in *)&to)->sin_port = htons(port);
752
770
}
753
771
754
772
if(quit_now){
771
789
}
772
790
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
773
791
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
774
const char *pcret;
775
792
if(af == AF_INET6){
776
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
777
sizeof(addrstr));
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
796
NI_NUMERICHOST);
778
797
} else {
779
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
780
sizeof(addrstr));
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
801
NI_NUMERICHOST);
781
802
}
782
if(pcret == NULL){
783
perror_plus("inet_ntop");
784
} else {
785
if(strcmp(addrstr, ip) != 0){
786
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
787
}
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
788
809
}
789
810
}
790
811
794
815
}
795
816
796
817
if(af == AF_INET6){
797
ret = connect(tcp_sd, &to.in6, sizeof(to));
818
ret = connect(tcp_sd, (struct sockaddr *)&to,
819
sizeof(struct sockaddr_in6));
798
820
} else {
799
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
821
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
822
sizeof(struct sockaddr_in));
800
823
}
801
824
if(ret < 0){
802
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
825
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
803
826
int e = errno;
804
827
perror_plus("connect");
805
828
errno = e;
1020
1043
return retval;
1021
1044
}
1022
1045
1046
__attribute__((nonnull))
1023
1047
static void resolve_callback(AvahiSServiceResolver *r,
1024
1048
AvahiIfIndex interface,
1025
1049
AvahiProtocol proto,
1033
1057
AVAHI_GCC_UNUSED AvahiStringList *txt,
1034
1058
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1035
1059
flags,
1036
void* mc){
1060
void *mc){
1037
1061
if(r == NULL){
1038
1062
return;
1039
1063
}
1092
1116
const char *domain,
1093
1117
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1094
1118
flags,
1095
void* mc){
1119
void *mc){
1096
1120
if(b == NULL){
1097
1121
return;
1098
1122
}
1158
1182
errno = old_errno;
1159
1183
}
1160
1184
1185
__attribute__((nonnull, warn_unused_result))
1161
1186
bool get_flags(const char *ifname, struct ifreq *ifr){
1162
1187
int ret;
1163
1188
error_t ret_errno;
1182
1207
return true;
1183
1208
}
1184
1209
1210
__attribute__((nonnull, warn_unused_result))
1185
1211
bool good_flags(const char *ifname, const struct ifreq *ifr){
1186
1212
1187
1213
/* Reject the loopback device */
1229
1255
* corresponds to an acceptable network device.
1230
1256
* (This function is passed to scandir(3) as a filter function.)
1231
1257
*/
1258
__attribute__((nonnull, warn_unused_result))
1232
1259
int good_interface(const struct dirent *if_entry){
1233
1260
if(if_entry->d_name[0] == '.'){
1234
1261
return 0;
1252
1279
/*
1253
1280
* This function determines if a network interface is up.
1254
1281
*/
1282
__attribute__((nonnull, warn_unused_result))
1255
1283
bool interface_is_up(const char *interface){
1256
1284
struct ifreq ifr;
1257
1285
if(not get_flags(interface, &ifr)){
1268
1296
/*
1269
1297
* This function determines if a network interface is running
1270
1298
*/
1299
__attribute__((nonnull, warn_unused_result))
1271
1300
bool interface_is_running(const char *interface){
1272
1301
struct ifreq ifr;
1273
1302
if(not get_flags(interface, &ifr)){
1281
1310
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1282
1311
}
1283
1312
1313
__attribute__((nonnull, pure, warn_unused_result))
1284
1314
int notdotentries(const struct dirent *direntry){
1285
1315
/* Skip "." and ".." */
1286
1316
if(direntry->d_name[0] == '.'
1293
1323
}
1294
1324
1295
1325
/* Is this directory entry a runnable program? */
1326
__attribute__((nonnull, warn_unused_result))
1296
1327
int runnable_hook(const struct dirent *direntry){
1297
1328
int ret;
1298
1329
size_t sret;
1306
1337
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1307
1338
"abcdefghijklmnopqrstuvwxyz"
1308
1339
"0123456789"
1309
"_-");
1340
"_.-");
1310
1341
if((direntry->d_name)[sret] != '\0'){
1311
1342
/* Contains non-allowed characters */
1312
1343
if(debug){
1316
1347
return 0;
1317
1348
}
1318
1349
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1321
if(ret < 0){
1322
perror_plus("asprintf");
1323
return 0;
1324
}
1325
1326
ret = stat(fullname, &st);
1350
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1327
1351
if(ret == -1){
1328
1352
if(debug){
1329
1353
perror_plus("Could not stat hook");
1353
1377
return 1;
1354
1378
}
1355
1379
1380
__attribute__((nonnull, warn_unused_result))
1356
1381
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1357
1382
mandos_context *mc){
1358
1383
int ret;
1362
1387
1363
1388
while(true){
1364
1389
if(mc->current_server == NULL){
1365
if (debug){
1390
if(debug){
1366
1391
fprintf_plus(stderr, "Wait until first server is found."
1367
1392
" No timeout!\n");
1368
1393
}
1369
1394
ret = avahi_simple_poll_iterate(s, -1);
1370
1395
} else {
1371
if (debug){
1396
if(debug){
1372
1397
fprintf_plus(stderr, "Check current_server if we should run"
1373
1398
" it, or wait\n");
1374
1399
}
1391
1416
- ((intmax_t)waited_time.tv_sec * 1000))
1392
1417
- ((intmax_t)waited_time.tv_nsec / 1000000));
1393
1418
1394
if (debug){
1419
if(debug){
1395
1420
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1396
1421
block_time);
1397
1422
}
1419
1444
ret = avahi_simple_poll_iterate(s, (int)block_time);
1420
1445
}
1421
1446
if(ret != 0){
1422
if (ret > 0 or errno != EINTR){
1447
if(ret > 0 or errno != EINTR){
1423
1448
return (ret != 1) ? ret : 0;
1424
1449
}
1425
1450
}
1427
1452
}
1428
1453
1429
1454
/* Set effective uid to 0, return errno */
1455
__attribute__((warn_unused_result))
1430
1456
error_t raise_privileges(void){
1431
1457
error_t old_errno = errno;
1432
1458
error_t ret_errno = 0;
1433
1459
if(seteuid(0) == -1){
1434
1460
ret_errno = errno;
1435
perror_plus("seteuid");
1436
1461
}
1437
1462
errno = old_errno;
1438
1463
return ret_errno;
1439
1464
}
1440
1465
1441
1466
/* Set effective and real user ID to 0. Return errno. */
1467
__attribute__((warn_unused_result))
1442
1468
error_t raise_privileges_permanently(void){
1443
1469
error_t old_errno = errno;
1444
1470
error_t ret_errno = raise_privileges();
1448
1474
}
1449
1475
if(setuid(0) == -1){
1450
1476
ret_errno = errno;
1451
perror_plus("seteuid");
1452
1477
}
1453
1478
errno = old_errno;
1454
1479
return ret_errno;
1455
1480
}
1456
1481
1457
1482
/* Set effective user ID to unprivileged saved user ID */
1483
__attribute__((warn_unused_result))
1458
1484
error_t lower_privileges(void){
1459
1485
error_t old_errno = errno;
1460
1486
error_t ret_errno = 0;
1461
1487
if(seteuid(uid) == -1){
1462
1488
ret_errno = errno;
1463
perror_plus("seteuid");
1464
1489
}
1465
1490
errno = old_errno;
1466
1491
return ret_errno;
1467
1492
}
1468
1493
1469
1494
/* Lower privileges permanently */
1495
__attribute__((warn_unused_result))
1470
1496
error_t lower_privileges_permanently(void){
1471
1497
error_t old_errno = errno;
1472
1498
error_t ret_errno = 0;
1473
1499
if(setuid(uid) == -1){
1474
1500
ret_errno = errno;
1475
perror_plus("setuid");
1476
1501
}
1477
1502
errno = old_errno;
1478
1503
return ret_errno;
1479
1504
}
1480
1505
1481
bool run_network_hooks(const char *mode, const char *interface,
1506
__attribute__((nonnull))
1507
void run_network_hooks(const char *mode, const char *interface,
1482
1508
const float delay){
1483
struct dirent **direntries;
1509
struct dirent **direntries = NULL;
1510
if(hookdir_fd == -1){
1511
hookdir_fd = open(hookdir, O_RDONLY);
1512
if(hookdir_fd == -1){
1513
if(errno == ENOENT){
1514
if(debug){
1515
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1516
" found\n", hookdir);
1517
}
1518
} else {
1519
perror_plus("open");
1520
}
1521
return;
1522
}
1523
}
1524
#ifdef __GLIBC__
1525
#if __GLIBC_PREREQ(2, 15)
1526
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1527
runnable_hook, alphasort);
1528
#else /* not __GLIBC_PREREQ(2, 15) */
1529
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1530
alphasort);
1531
#endif /* not __GLIBC_PREREQ(2, 15) */
1532
#else /* not __GLIBC__ */
1533
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1534
alphasort);
1535
#endif /* not __GLIBC__ */
1536
if(numhooks == -1){
1537
perror_plus("scandir");
1538
return;
1539
}
1484
1540
struct dirent *direntry;
1485
1541
int ret;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1487
alphasort);
1488
if(numhooks == -1){
1489
if(errno == ENOENT){
1490
if(debug){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1493
}
1494
} else {
1495
perror_plus("scandir");
1542
int devnull = open("/dev/null", O_RDONLY);
1543
for(int i = 0; i < numhooks; i++){
1544
direntry = direntries[i];
1545
if(debug){
1546
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1547
direntry->d_name);
1496
1548
}
1497
} else {
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1503
if(ret < 0){
1549
pid_t hook_pid = fork();
1550
if(hook_pid == 0){
1551
/* Child */
1552
/* Raise privileges */
1553
errno = raise_privileges_permanently();
1554
if(errno != 0){
1555
perror_plus("Failed to raise privileges");
1556
_exit(EX_NOPERM);
1557
}
1558
/* Set group */
1559
errno = 0;
1560
ret = setgid(0);
1561
if(ret == -1){
1562
perror_plus("setgid");
1563
_exit(EX_NOPERM);
1564
}
1565
/* Reset supplementary groups */
1566
errno = 0;
1567
ret = setgroups(0, NULL);
1568
if(ret == -1){
1569
perror_plus("setgroups");
1570
_exit(EX_NOPERM);
1571
}
1572
ret = dup2(devnull, STDIN_FILENO);
1573
if(ret == -1){
1574
perror_plus("dup2(devnull, STDIN_FILENO)");
1575
_exit(EX_OSERR);
1576
}
1577
ret = close(devnull);
1578
if(ret == -1){
1579
perror_plus("close");
1580
_exit(EX_OSERR);
1581
}
1582
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1583
if(ret == -1){
1584
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1585
_exit(EX_OSERR);
1586
}
1587
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1588
if(ret == -1){
1589
perror_plus("setenv");
1590
_exit(EX_OSERR);
1591
}
1592
ret = setenv("DEVICE", interface, 1);
1593
if(ret == -1){
1594
perror_plus("setenv");
1595
_exit(EX_OSERR);
1596
}
1597
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1598
if(ret == -1){
1599
perror_plus("setenv");
1600
_exit(EX_OSERR);
1601
}
1602
ret = setenv("MODE", mode, 1);
1603
if(ret == -1){
1604
perror_plus("setenv");
1605
_exit(EX_OSERR);
1606
}
1607
char *delaystring;
1608
ret = asprintf(&delaystring, "%f", (double)delay);
1609
if(ret == -1){
1504
1610
perror_plus("asprintf");
1505
continue;
1506
}
1507
if(debug){
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1509
direntry->d_name);
1510
}
1511
pid_t hook_pid = fork();
1512
if(hook_pid == 0){
1513
/* Child */
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1516
/* Set group */
1517
errno = 0;
1518
ret = setgid(0);
1519
if(ret == -1){
1520
perror_plus("setgid");
1521
}
1522
/* Reset supplementary groups */
1523
errno = 0;
1524
ret = setgroups(0, NULL);
1525
if(ret == -1){
1526
perror_plus("setgroups");
1527
}
1528
dup2(devnull, STDIN_FILENO);
1529
close(devnull);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1532
if(ret == -1){
1533
perror_plus("setenv");
1534
_exit(EX_OSERR);
1535
}
1536
ret = setenv("DEVICE", interface, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("MODE", mode, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
char *delaystring;
1552
ret = asprintf(&delaystring, "%f", delay);
1553
if(ret == -1){
1554
perror_plus("asprintf");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("DELAY", delaystring, 1);
1558
if(ret == -1){
1559
free(delaystring);
1560
perror_plus("setenv");
1561
_exit(EX_OSERR);
1562
}
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("DELAY", delaystring, 1);
1614
if(ret == -1){
1563
1615
free(delaystring);
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1566
if(ret == -1){
1567
perror_plus("setenv");
1568
_exit(EX_OSERR);
1569
}
1570
}
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1574
}
1616
perror_plus("setenv");
1617
_exit(EX_OSERR);
1618
}
1619
free(delaystring);
1620
if(connect_to != NULL){
1621
ret = setenv("CONNECT", connect_to, 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
_exit(EX_OSERR);
1625
}
1626
}
1627
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1628
if(hook_fd == -1){
1629
perror_plus("openat");
1630
_exit(EXIT_FAILURE);
1631
}
1632
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1633
perror_plus("close");
1634
_exit(EXIT_FAILURE);
1635
}
1636
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1637
environ) == -1){
1638
perror_plus("fexecve");
1639
_exit(EXIT_FAILURE);
1640
}
1641
} else {
1642
int status;
1643
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1644
perror_plus("waitpid");
1645
continue;
1646
}
1647
if(WIFEXITED(status)){
1648
if(WEXITSTATUS(status) != 0){
1649
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1650
" with status %d\n", direntry->d_name,
1651
WEXITSTATUS(status));
1652
continue;
1653
}
1654
} else if(WIFSIGNALED(status)){
1655
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1656
" signal %d\n", direntry->d_name,
1657
WTERMSIG(status));
1658
continue;
1575
1659
} else {
1576
int status;
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1579
free(fullname);
1580
continue;
1581
}
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1587
free(fullname);
1588
continue;
1589
}
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1593
WTERMSIG(status));
1594
free(fullname);
1595
continue;
1596
} else {
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1599
free(fullname);
1600
continue;
1601
}
1602
}
1603
free(fullname);
1604
if(debug){
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1606
direntry->d_name);
1607
}
1608
}
1609
close(devnull);
1610
}
1611
return true;
1660
fprintf_plus(stderr, "Warning: network hook \"%s\""
1661
" crashed\n", direntry->d_name);
1662
continue;
1663
}
1664
}
1665
if(debug){
1666
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1667
direntry->d_name);
1668
}
1669
}
1670
free(direntries);
1671
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1672
perror_plus("close");
1673
} else {
1674
hookdir_fd = -1;
1675
}
1676
close(devnull);
1612
1677
}
1613
1678
1679
__attribute__((nonnull, warn_unused_result))
1614
1680
error_t bring_up_interface(const char *const interface,
1615
1681
const float delay){
1616
int sd = -1;
1617
1682
error_t old_errno = errno;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1683
int ret;
1620
1684
struct ifreq network;
1621
1685
unsigned int if_index = if_nametoindex(interface);
1622
1686
if(if_index == 0){
1631
1695
}
1632
1696
1633
1697
if(not interface_is_up(interface)){
1634
if(not get_flags(interface, &network) and debug){
1698
error_t ret_errno = 0, ioctl_errno = 0;
1699
if(not get_flags(interface, &network)){
1635
1700
ret_errno = errno;
1636
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1637
1702
"\"%s\"\n", interface);
1703
errno = old_errno;
1638
1704
return ret_errno;
1639
1705
}
1640
network.ifr_flags |= IFF_UP;
1706
network.ifr_flags |= IFF_UP; /* set flag */
1641
1707
1642
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
if(sd < 0){
1708
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1709
if(sd == -1){
1644
1710
ret_errno = errno;
1645
1711
perror_plus("socket");
1646
1712
errno = old_errno;
1647
1713
return ret_errno;
1648
1714
}
1649
1715
1650
1716
if(quit_now){
1651
close(sd);
1717
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1718
if(ret == -1){
1719
perror_plus("close");
1720
}
1652
1721
errno = old_errno;
1653
1722
return EINTR;
1654
1723
}
1658
1727
interface);
1659
1728
}
1660
1729
1661
/* Raise priviliges */
1662
raise_privileges();
1730
/* Raise privileges */
1731
ret_errno = raise_privileges();
1732
if(ret_errno != 0){
1733
errno = ret_errno;
1734
perror_plus("Failed to raise privileges");
1735
}
1663
1736
1664
1737
#ifdef __linux__
1665
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1666
messages about the network interface to mess up the prompt */
1667
int ret_linux = klogctl(8, NULL, 5);
1668
bool restore_loglevel = true;
1669
if(ret_linux == -1){
1670
restore_loglevel = false;
1671
perror_plus("klogctl");
1738
int ret_linux;
1739
bool restore_loglevel = false;
1740
if(ret_errno == 0){
1741
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1742
messages about the network interface to mess up the prompt */
1743
ret_linux = klogctl(8, NULL, 5);
1744
if(ret_linux == -1){
1745
perror_plus("klogctl");
1746
} else {
1747
restore_loglevel = true;
1748
}
1672
1749
}
1673
1750
#endif /* __linux__ */
1674
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1675
ret_errno = errno;
1751
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1752
ioctl_errno = errno;
1676
1753
#ifdef __linux__
1677
1754
if(restore_loglevel){
1678
1755
ret_linux = klogctl(7, NULL, 0);
1682
1759
}
1683
1760
#endif /* __linux__ */
1684
1761
1685
/* Lower privileges */
1686
lower_privileges();
1762
/* If raise_privileges() succeeded above */
1763
if(ret_errno == 0){
1764
/* Lower privileges */
1765
ret_errno = lower_privileges();
1766
if(ret_errno != 0){
1767
errno = ret_errno;
1768
perror_plus("Failed to lower privileges");
1769
}
1770
}
1687
1771
1688
1772
/* Close the socket */
1689
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1692
1776
}
1693
1777
1694
1778
if(ret_setflags == -1){
1695
errno = ret_errno;
1779
errno = ioctl_errno;
1696
1780
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
1781
errno = old_errno;
1698
return ret_errno;
1782
return ioctl_errno;
1699
1783
}
1700
1784
} else if(debug){
1701
1785
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1719
1803
return 0;
1720
1804
}
1721
1805
1806
__attribute__((nonnull, warn_unused_result))
1722
1807
error_t take_down_interface(const char *const interface){
1723
int sd = -1;
1724
1808
error_t old_errno = errno;
1725
error_t ret_errno = 0;
1726
int ret, ret_setflags;
1727
1809
struct ifreq network;
1728
1810
unsigned int if_index = if_nametoindex(interface);
1729
1811
if(if_index == 0){
1732
1814
return ENXIO;
1733
1815
}
1734
1816
if(interface_is_up(interface)){
1817
error_t ret_errno = 0, ioctl_errno = 0;
1735
1818
if(not get_flags(interface, &network) and debug){
1736
1819
ret_errno = errno;
1737
1820
fprintf_plus(stderr, "Failed to get flags for interface "
1738
1821
"\"%s\"\n", interface);
1822
errno = old_errno;
1739
1823
return ret_errno;
1740
1824
}
1741
1825
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1742
1826
1743
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1744
if(sd < 0){
1827
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1828
if(sd == -1){
1745
1829
ret_errno = errno;
1746
1830
perror_plus("socket");
1747
1831
errno = old_errno;
1753
1837
interface);
1754
1838
}
1755
1839
1756
/* Raise priviliges */
1757
raise_privileges();
1758
1759
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1760
ret_errno = errno;
1761
1762
/* Lower privileges */
1763
lower_privileges();
1840
/* Raise privileges */
1841
ret_errno = raise_privileges();
1842
if(ret_errno != 0){
1843
errno = ret_errno;
1844
perror_plus("Failed to raise privileges");
1845
}
1846
1847
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1848
ioctl_errno = errno;
1849
1850
/* If raise_privileges() succeeded above */
1851
if(ret_errno == 0){
1852
/* Lower privileges */
1853
ret_errno = lower_privileges();
1854
if(ret_errno != 0){
1855
errno = ret_errno;
1856
perror_plus("Failed to lower privileges");
1857
}
1858
}
1764
1859
1765
1860
/* Close the socket */
1766
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1861
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1767
1862
if(ret == -1){
1768
1863
perror_plus("close");
1769
1864
}
1770
1865
1771
1866
if(ret_setflags == -1){
1772
errno = ret_errno;
1867
errno = ioctl_errno;
1773
1868
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1774
1869
errno = old_errno;
1775
return ret_errno;
1870
return ioctl_errno;
1776
1871
}
1777
1872
} else if(debug){
1778
1873
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1786
1881
int main(int argc, char *argv[]){
1787
1882
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1788
1883
.priority = "SECURE256:!CTYPE-X.509:"
1789
"+CTYPE-OPENPGP", .current_server = NULL,
1884
"+CTYPE-OPENPGP", .current_server = NULL,
1790
1885
.interfaces = NULL, .interfaces_size = 0 };
1791
1886
AvahiSServiceBrowser *sb = NULL;
1792
1887
error_t ret_errno;
1796
1891
int exitcode = EXIT_SUCCESS;
1797
1892
char *interfaces_to_take_down = NULL;
1798
1893
size_t interfaces_to_take_down_size = 0;
1799
char tempdir[] = "/tmp/mandosXXXXXX";
1800
bool tempdir_created = false;
1894
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1895
char old_tempdir[] = "/tmp/mandosXXXXXX";
1896
char *tempdir = NULL;
1801
1897
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1802
1898
const char *seckey = PATHDIR "/" SECKEY;
1803
1899
const char *pubkey = PATHDIR "/" PUBKEY;
1804
1900
char *interfaces_hooks = NULL;
1805
size_t interfaces_hooks_size = 0;
1806
1901
1807
1902
bool gnutls_initialized = false;
1808
1903
bool gpgme_initialized = false;
1986
2081
/* Work around Debian bug #633582:
1987
2082
<http://bugs.debian.org/633582> */
1988
2083
1989
/* Re-raise priviliges */
1990
if(raise_privileges() == 0){
2084
/* Re-raise privileges */
2085
ret_errno = raise_privileges();
2086
if(ret_errno != 0){
2087
errno = ret_errno;
2088
perror_plus("Failed to raise privileges");
2089
} else {
1991
2090
struct stat st;
1992
2091
1993
2092
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2033
2132
}
2034
2133
2035
2134
/* Lower privileges */
2036
lower_privileges();
2135
ret_errno = lower_privileges();
2136
if(ret_errno != 0){
2137
errno = ret_errno;
2138
perror_plus("Failed to lower privileges");
2139
}
2037
2140
}
2038
2141
}
2039
2142
2063
2166
goto end;
2064
2167
}
2065
2168
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2066
interfaces_hooks_size = mc.interfaces_size;
2067
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2068
(int)',');
2069
}
2070
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2071
interfaces_hooks : "", delay)){
2072
goto end;
2073
}
2169
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2170
}
2171
run_network_hooks("start", interfaces_hooks != NULL ?
2172
interfaces_hooks : "", delay);
2074
2173
}
2075
2174
2076
2175
if(not debug){
2154
2253
2155
2254
/* If no interfaces were specified, make a list */
2156
2255
if(mc.interfaces == NULL){
2157
struct dirent **direntries;
2256
struct dirent **direntries = NULL;
2158
2257
/* Look for any good interfaces */
2159
2258
ret = scandir(sys_class_net, &direntries, good_interface,
2160
2259
alphasort);
2164
2263
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2165
2264
direntries[i]->d_name);
2166
2265
if(ret_errno != 0){
2266
errno = ret_errno;
2167
2267
perror_plus("argz_add");
2168
2268
continue;
2169
2269
}
2174
2274
}
2175
2275
free(direntries);
2176
2276
} else {
2177
free(direntries);
2277
if(ret == 0){
2278
free(direntries);
2279
}
2178
2280
fprintf_plus(stderr, "Could not find a network interface\n");
2179
2281
exitcode = EXIT_FAILURE;
2180
2282
goto end;
2181
2283
}
2182
2284
}
2183
2285
2184
/* Bring up interfaces which are down */
2286
/* Bring up interfaces which are down, and remove any "none"s */
2185
2287
{
2186
2288
char *interface = NULL;
2187
2289
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2203
2305
break;
2204
2306
}
2205
2307
bool interface_was_up = interface_is_up(interface);
2206
ret = bring_up_interface(interface, delay);
2308
errno = bring_up_interface(interface, delay);
2207
2309
if(not interface_was_up){
2208
if(ret != 0){
2209
errno = ret;
2310
if(errno != 0){
2210
2311
perror_plus("Failed to bring up interface");
2211
2312
} else {
2212
ret_errno = argz_add(&interfaces_to_take_down,
2213
&interfaces_to_take_down_size,
2214
interface);
2313
errno = argz_add(&interfaces_to_take_down,
2314
&interfaces_to_take_down_size,
2315
interface);
2316
if(errno != 0){
2317
perror_plus("argz_add");
2318
}
2215
2319
}
2216
2320
}
2217
2321
}
2246
2350
goto end;
2247
2351
}
2248
2352
2249
if(mkdtemp(tempdir) == NULL){
2353
/* Try /run/tmp before /tmp */
2354
tempdir = mkdtemp(run_tempdir);
2355
if(tempdir == NULL and errno == ENOENT){
2356
if(debug){
2357
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2358
run_tempdir, old_tempdir);
2359
}
2360
tempdir = mkdtemp(old_tempdir);
2361
}
2362
if(tempdir == NULL){
2250
2363
perror_plus("mkdtemp");
2251
2364
goto end;
2252
2365
}
2253
tempdir_created = true;
2254
2366
2255
2367
if(quit_now){
2256
2368
goto end;
2328
2440
fprintf_plus(stderr, "Retrying in %d seconds\n",
2329
2441
(int)retry_interval);
2330
2442
}
2331
sleep((int)retry_interval);
2443
sleep((unsigned int)retry_interval);
2332
2444
}
2333
2445
2334
if (not quit_now){
2446
if(not quit_now){
2335
2447
exitcode = EXIT_SUCCESS;
2336
2448
}
2337
2449
2392
2504
if(debug){
2393
2505
fprintf_plus(stderr, "Starting Avahi loop search\n");
2394
2506
}
2395
2507
2396
2508
ret = avahi_loop_with_timeout(simple_poll,
2397
2509
(int)(retry_interval * 1000), &mc);
2398
2510
if(debug){
2439
2551
}
2440
2552
}
2441
2553
2442
/* Re-raise priviliges */
2554
/* Re-raise privileges */
2443
2555
{
2444
raise_privileges();
2445
2446
/* Run network hooks */
2447
run_network_hooks("stop", interfaces_hooks != NULL ?
2448
interfaces_hooks : "", delay);
2449
2450
/* Take down the network interfaces which were brought up */
2451
{
2452
char *interface = NULL;
2453
while((interface=argz_next(interfaces_to_take_down,
2454
interfaces_to_take_down_size,
2455
interface))){
2456
ret_errno = take_down_interface(interface);
2457
if(ret_errno != 0){
2458
errno = ret_errno;
2459
perror_plus("Failed to take down interface");
2460
}
2461
}
2462
if(debug and (interfaces_to_take_down == NULL)){
2463
fprintf_plus(stderr, "No interfaces needed to be taken"
2464
" down\n");
2465
}
2466
}
2467
2468
lower_privileges_permanently();
2556
ret_errno = raise_privileges();
2557
if(ret_errno != 0){
2558
errno = ret_errno;
2559
perror_plus("Failed to raise privileges");
2560
} else {
2561
2562
/* Run network hooks */
2563
run_network_hooks("stop", interfaces_hooks != NULL ?
2564
interfaces_hooks : "", delay);
2565
2566
/* Take down the network interfaces which were brought up */
2567
{
2568
char *interface = NULL;
2569
while((interface=argz_next(interfaces_to_take_down,
2570
interfaces_to_take_down_size,
2571
interface))){
2572
ret_errno = take_down_interface(interface);
2573
if(ret_errno != 0){
2574
errno = ret_errno;
2575
perror_plus("Failed to take down interface");
2576
}
2577
}
2578
if(debug and (interfaces_to_take_down == NULL)){
2579
fprintf_plus(stderr, "No interfaces needed to be taken"
2580
" down\n");
2581
}
2582
}
2583
}
2584
2585
ret_errno = lower_privileges_permanently();
2586
if(ret_errno != 0){
2587
errno = ret_errno;
2588
perror_plus("Failed to lower privileges permanently");
2589
}
2469
2590
}
2470
2591
2471
2592
free(interfaces_to_take_down);
2472
2593
free(interfaces_hooks);
2473
2594
2474
2595
/* Removes the GPGME temp directory and all files inside */
2475
if(tempdir_created){
2596
if(tempdir != NULL){
2476
2597
struct dirent **direntries = NULL;
2477
struct dirent *direntry = NULL;
2478
int numentries = scandir(tempdir, &direntries, notdotentries,
2479
alphasort);
2480
if (numentries > 0){
2481
for(int i = 0; i < numentries; i++){
2482
direntry = direntries[i];
2483
char *fullname = NULL;
2484
ret = asprintf(&fullname, "%s/%s", tempdir,
2485
direntry->d_name);
2486
if(ret < 0){
2487
perror_plus("asprintf");
2488
continue;
2489
}
2490
ret = remove(fullname);
2491
if(ret == -1){
2492
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2493
strerror(errno));
2494
}
2495
free(fullname);
2598
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2599
O_NOFOLLOW));
2600
if(tempdir_fd == -1){
2601
perror_plus("open");
2602
} else {
2603
#ifdef __GLIBC__
2604
#if __GLIBC_PREREQ(2, 15)
2605
int numentries = scandirat(tempdir_fd, ".", &direntries,
2606
notdotentries, alphasort);
2607
#else /* not __GLIBC_PREREQ(2, 15) */
2608
int numentries = scandir(tempdir, &direntries, notdotentries,
2609
alphasort);
2610
#endif /* not __GLIBC_PREREQ(2, 15) */
2611
#else /* not __GLIBC__ */
2612
int numentries = scandir(tempdir, &direntries, notdotentries,
2613
alphasort);
2614
#endif /* not __GLIBC__ */
2615
if(numentries >= 0){
2616
for(int i = 0; i < numentries; i++){
2617
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2618
if(ret == -1){
2619
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2620
" \"%s\", 0): %s\n", tempdir,
2621
direntries[i]->d_name, strerror(errno));
2622
}
2623
}
2624
2625
/* need to clean even if 0 because man page doesn't specify */
2626
free(direntries);
2627
if(numentries == -1){
2628
perror_plus("scandir");
2629
}
2630
ret = rmdir(tempdir);
2631
if(ret == -1 and errno != ENOENT){
2632
perror_plus("rmdir");
2633
}
2496
2634
}
2497
}
2498
2499
/* need to clean even if 0 because man page doesn't specify */
2500
free(direntries);
2501
if (numentries == -1){
2502
perror_plus("scandir");
2503
}
2504
ret = rmdir(tempdir);
2505
if(ret == -1 and errno != ENOENT){
2506
perror_plus("rmdir");
2635
TEMP_FAILURE_RETRY(close(tempdir_fd));
2507
2636
}
2508
2637
}
2509
2638
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0