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- Committer: Teddy Hogeborn
- Date: 2015-07-08 21:18:49 UTC
- Revision ID: teddy@recompile.se-20150708211849-scisutuofnxumqc7
mandos-client: Add --dh-params FILE option.
* plugins.d/mandos-client.c: Added --dh-params FILE option.
(init_gnutls_global): New "dhparamsfilename" argument. All callers
changed. Read and use Diffie-Hellman
parameters from it. Bug fix: check for error
when opening seckeyfile for the second time.
(init_gnutls_session): Remove unnecessary call to
gnutls_dh_set_prime_bits();
(main): New variable "dh_params_file".
(main/argp_options): Added "--dh-params" option.
(main/parse_opt): - '' -
* plugins.d/mandos-client.xml (SYNOPSIS): Add --dh-params option.
(OPTIONS): Document --dh-params option and document that the
--dh-bits options is potentially overridden by the
--dh-params option.
* plugins.d/mandos-client.c: Added --dh-params FILE option.
(init_gnutls_global): New "dhparamsfilename" argument. All callers
changed. Read and use Diffie-Hellman
parameters from it. Bug fix: check for error
when opening seckeyfile for the second time.
(init_gnutls_session): Remove unnecessary call to
gnutls_dh_set_prime_bits();
(main): New variable "dh_params_file".
(main/argp_options): Added "--dh-params" option.
(main/parse_opt): - '' -
* plugins.d/mandos-client.xml (SYNOPSIS): Add --dh-params option.
(OPTIONS): Document --dh-params option and document that the
--dh-bits options is potentially overridden by the
--dh-params option.
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2018 Teddy Hogeborn
13
* Copyright © 2008-2018 Björn Påhlsson
14
*
15
* This file is part of Mandos.
16
*
17
* Mandos is free software: you can redistribute it and/or modify it
18
* under the terms of the GNU General Public License as published by
19
* the Free Software Foundation, either version 3 of the License, or
20
* (at your option) any later version.
21
*
22
* Mandos is distributed in the hope that it will be useful, but
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
14
*
15
* This program is free software: you can redistribute it and/or
16
* modify it under the terms of the GNU General Public License as
17
* published by the Free Software Foundation, either version 3 of the
18
* License, or (at your option) any later version.
19
*
20
* This program is distributed in the hope that it will be useful, but
23
21
* WITHOUT ANY WARRANTY; without even the implied warranty of
24
22
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25
23
* General Public License for more details.
26
24
*
27
25
* You should have received a copy of the GNU General Public License
28
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
26
* along with this program. If not, see
27
* <http://www.gnu.org/licenses/>.
29
28
*
30
29
* Contact the authors at <mandos@recompile.se>.
31
30
*/
47
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
48
47
strtof(), abort() */
49
48
#include <stdbool.h> /* bool, false, true */
50
#include <string.h> /* strcmp(), strlen(), strerror(),
51
asprintf(), strncpy(), strsignal()
52
*/
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
53
51
#include <sys/ioctl.h> /* ioctl */
54
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
55
53
sockaddr_in6, PF_INET6,
59
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
60
58
inet_pton(), connect(),
61
59
getnameinfo() */
62
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
63
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
64
62
*/
65
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
66
64
strtoimax() */
67
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
68
EAI_SYSTEM, ENETUNREACH,
69
EHOSTUNREACH, ECONNREFUSED, EPROTO,
70
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
71
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
72
66
program_invocation_short_name */
73
67
#include <time.h> /* nanosleep(), time(), sleep() */
74
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
272
266
return true;
273
267
}
274
268
275
/* Set effective uid to 0, return errno */
276
__attribute__((warn_unused_result))
277
int raise_privileges(void){
278
int old_errno = errno;
279
int ret = 0;
280
if(seteuid(0) == -1){
281
ret = errno;
282
}
283
errno = old_errno;
284
return ret;
285
}
286
287
/* Set effective and real user ID to 0. Return errno. */
288
__attribute__((warn_unused_result))
289
int raise_privileges_permanently(void){
290
int old_errno = errno;
291
int ret = raise_privileges();
292
if(ret != 0){
293
errno = old_errno;
294
return ret;
295
}
296
if(setuid(0) == -1){
297
ret = errno;
298
}
299
errno = old_errno;
300
return ret;
301
}
302
303
/* Set effective user ID to unprivileged saved user ID */
304
__attribute__((warn_unused_result))
305
int lower_privileges(void){
306
int old_errno = errno;
307
int ret = 0;
308
if(seteuid(uid) == -1){
309
ret = errno;
310
}
311
errno = old_errno;
312
return ret;
313
}
314
315
/* Lower privileges permanently */
316
__attribute__((warn_unused_result))
317
int lower_privileges_permanently(void){
318
int old_errno = errno;
319
int ret = 0;
320
if(setuid(uid) == -1){
321
ret = errno;
322
}
323
errno = old_errno;
324
return ret;
325
}
326
327
269
/*
328
270
* Initialize GPGME.
329
271
*/
349
291
return false;
350
292
}
351
293
352
/* Workaround for systems without a real-time clock; see also
353
Debian bug #894495: <https://bugs.debian.org/894495> */
354
do {
355
{
356
time_t currtime = time(NULL);
357
if(currtime != (time_t)-1){
358
struct tm tm;
359
if(gmtime_r(&currtime, &tm) == NULL) {
360
perror_plus("gmtime_r");
361
break;
362
}
363
if(tm.tm_year != 70 or tm.tm_mon != 0){
364
break;
365
}
366
if(debug){
367
fprintf_plus(stderr, "System clock is January 1970");
368
}
369
} else {
370
if(debug){
371
fprintf_plus(stderr, "System clock is invalid");
372
}
373
}
374
}
375
struct stat keystat;
376
ret = fstat(fd, &keystat);
377
if(ret != 0){
378
perror_plus("fstat");
379
break;
380
}
381
ret = raise_privileges();
382
if(ret != 0){
383
errno = ret;
384
perror_plus("Failed to raise privileges");
385
break;
386
}
387
if(debug){
388
fprintf_plus(stderr,
389
"Setting system clock to key file mtime");
390
}
391
time_t keytime = keystat.st_mtim.tv_sec;
392
if(stime(&keytime) != 0){
393
perror_plus("stime");
394
}
395
ret = lower_privileges();
396
if(ret != 0){
397
errno = ret;
398
perror_plus("Failed to lower privileges");
399
}
400
} while(false);
401
402
294
rc = gpgme_data_new_from_fd(&pgp_data, fd);
403
295
if(rc != GPG_ERR_NO_ERROR){
404
296
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
412
304
gpgme_strsource(rc), gpgme_strerror(rc));
413
305
return false;
414
306
}
415
{
416
gpgme_import_result_t import_result
417
= gpgme_op_import_result(mc->ctx);
418
if((import_result->imported < 1
419
or import_result->not_imported > 0)
420
and import_result->unchanged == 0){
421
fprintf_plus(stderr, "bad gpgme_op_import_results:\n");
422
fprintf_plus(stderr,
423
"The total number of considered keys: %d\n",
424
import_result->considered);
425
fprintf_plus(stderr,
426
"The number of keys without user ID: %d\n",
427
import_result->no_user_id);
428
fprintf_plus(stderr,
429
"The total number of imported keys: %d\n",
430
import_result->imported);
431
fprintf_plus(stderr, "The number of imported RSA keys: %d\n",
432
import_result->imported_rsa);
433
fprintf_plus(stderr, "The number of unchanged keys: %d\n",
434
import_result->unchanged);
435
fprintf_plus(stderr, "The number of new user IDs: %d\n",
436
import_result->new_user_ids);
437
fprintf_plus(stderr, "The number of new sub keys: %d\n",
438
import_result->new_sub_keys);
439
fprintf_plus(stderr, "The number of new signatures: %d\n",
440
import_result->new_signatures);
441
fprintf_plus(stderr, "The number of new revocations: %d\n",
442
import_result->new_revocations);
443
fprintf_plus(stderr,
444
"The total number of secret keys read: %d\n",
445
import_result->secret_read);
446
fprintf_plus(stderr,
447
"The number of imported secret keys: %d\n",
448
import_result->secret_imported);
449
fprintf_plus(stderr,
450
"The number of unchanged secret keys: %d\n",
451
import_result->secret_unchanged);
452
fprintf_plus(stderr, "The number of keys not imported: %d\n",
453
import_result->not_imported);
454
for(gpgme_import_status_t import_status
455
= import_result->imports;
456
import_status != NULL;
457
import_status = import_status->next){
458
fprintf_plus(stderr, "Import status for key: %s\n",
459
import_status->fpr);
460
if(import_status->result != GPG_ERR_NO_ERROR){
461
fprintf_plus(stderr, "Import result: %s: %s\n",
462
gpgme_strsource(import_status->result),
463
gpgme_strerror(import_status->result));
464
}
465
fprintf_plus(stderr, "Key status:\n");
466
fprintf_plus(stderr,
467
import_status->status & GPGME_IMPORT_NEW
468
? "The key was new.\n"
469
: "The key was not new.\n");
470
fprintf_plus(stderr,
471
import_status->status & GPGME_IMPORT_UID
472
? "The key contained new user IDs.\n"
473
: "The key did not contain new user IDs.\n");
474
fprintf_plus(stderr,
475
import_status->status & GPGME_IMPORT_SIG
476
? "The key contained new signatures.\n"
477
: "The key did not contain new signatures.\n");
478
fprintf_plus(stderr,
479
import_status->status & GPGME_IMPORT_SUBKEY
480
? "The key contained new sub keys.\n"
481
: "The key did not contain new sub keys.\n");
482
fprintf_plus(stderr,
483
import_status->status & GPGME_IMPORT_SECRET
484
? "The key contained a secret key.\n"
485
: "The key did not contain a secret key.\n");
486
}
487
return false;
488
}
489
}
490
307
491
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
492
309
if(ret == -1){
493
310
perror_plus("close");
494
311
}
533
350
/* Create new GPGME "context" */
534
351
rc = gpgme_new(&(mc->ctx));
535
352
if(rc != GPG_ERR_NO_ERROR){
536
fprintf_plus(stderr, "bad gpgme_new: %s: %s\n",
537
gpgme_strsource(rc), gpgme_strerror(rc));
353
fprintf_plus(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
355
gpgme_strerror(rc));
538
356
return false;
539
357
}
540
358
576
394
/* Create new empty GPGME data buffer for the plaintext */
577
395
rc = gpgme_data_new(&dh_plain);
578
396
if(rc != GPG_ERR_NO_ERROR){
579
fprintf_plus(stderr, "bad gpgme_data_new: %s: %s\n",
397
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
580
399
gpgme_strsource(rc), gpgme_strerror(rc));
581
400
gpgme_data_release(dh_crypto);
582
401
return -1;
595
414
if(result == NULL){
596
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
597
416
} else {
598
if(result->unsupported_algorithm != NULL) {
599
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
600
result->unsupported_algorithm);
601
}
602
fprintf_plus(stderr, "Wrong key usage: %s\n",
603
result->wrong_key_usage ? "Yes" : "No");
417
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
419
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
604
421
if(result->file_name != NULL){
605
422
fprintf_plus(stderr, "File name: %s\n", result->file_name);
606
423
}
607
608
for(gpgme_recipient_t r = result->recipients; r != NULL;
609
r = r->next){
424
gpgme_recipient_t recipient;
425
recipient = result->recipients;
426
while(recipient != NULL){
610
427
fprintf_plus(stderr, "Public key algorithm: %s\n",
611
gpgme_pubkey_algo_name(r->pubkey_algo));
612
fprintf_plus(stderr, "Key ID: %s\n", r->keyid);
428
gpgme_pubkey_algo_name
429
(recipient->pubkey_algo));
430
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
613
431
fprintf_plus(stderr, "Secret key available: %s\n",
614
r->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
432
recipient->status == GPG_ERR_NO_SECKEY
433
? "No" : "Yes");
434
recipient = recipient->next;
615
435
}
616
436
}
617
437
}
693
513
fprintf_plus(stderr, "GnuTLS: %s", string);
694
514
}
695
515
696
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
697
517
static int init_gnutls_global(const char *pubkeyfilename,
698
518
const char *seckeyfilename,
699
519
const char *dhparamsfilename,
705
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
706
526
}
707
527
528
ret = gnutls_global_init();
529
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
531
safer_gnutls_strerror(ret));
532
return -1;
533
}
534
708
535
if(debug){
709
536
/* "Use a log level over 10 to enable all debugging options."
710
537
* - GnuTLS manual
718
545
if(ret != GNUTLS_E_SUCCESS){
719
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
720
547
safer_gnutls_strerror(ret));
548
gnutls_global_deinit();
721
549
return -1;
722
550
}
723
551
787
615
}
788
616
params.size += (unsigned int)bytes_read;
789
617
}
790
ret = close(dhpfile);
791
if(ret == -1){
792
perror_plus("close");
793
}
794
618
if(params.data == NULL){
795
619
dhparamsfilename = NULL;
796
620
}
805
629
safer_gnutls_strerror(ret));
806
630
dhparamsfilename = NULL;
807
631
}
808
free(params.data);
809
632
} while(false);
810
633
}
811
634
if(dhparamsfilename == NULL){
932
755
globalfail:
933
756
934
757
gnutls_certificate_free_credentials(mc->cred);
758
gnutls_global_deinit();
935
759
gnutls_dh_params_deinit(mc->dh_params);
936
760
return -1;
937
761
}
996
820
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
997
821
__attribute__((unused)) const char *txt){}
998
822
823
/* Set effective uid to 0, return errno */
824
__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
828
if(seteuid(0) == -1){
829
ret_errno = errno;
830
}
831
errno = old_errno;
832
return ret_errno;
833
}
834
835
/* Set effective and real user ID to 0. Return errno. */
836
__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
840
if(ret_errno != 0){
841
errno = old_errno;
842
return ret_errno;
843
}
844
if(setuid(0) == -1){
845
ret_errno = errno;
846
}
847
errno = old_errno;
848
return ret_errno;
849
}
850
851
/* Set effective user ID to unprivileged saved user ID */
852
__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
856
if(seteuid(uid) == -1){
857
ret_errno = errno;
858
}
859
errno = old_errno;
860
return ret_errno;
861
}
862
863
/* Lower privileges permanently */
864
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
868
if(setuid(uid) == -1){
869
ret_errno = errno;
870
}
871
errno = old_errno;
872
return ret_errno;
873
}
874
999
875
/* Helper function to add_local_route() and delete_local_route() */
1000
876
__attribute__((nonnull, warn_unused_result))
1001
877
static bool add_delete_local_route(const bool add,
1055
931
perror_plus("dup2(devnull, STDIN_FILENO)");
1056
932
_exit(EX_OSERR);
1057
933
}
1058
ret = close(devnull);
934
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
1059
935
if(ret == -1){
1060
936
perror_plus("close");
1061
937
_exit(EX_OSERR);
1078
954
helper, O_RDONLY));
1079
955
if(helper_fd == -1){
1080
956
perror_plus("openat");
1081
close(helperdir_fd);
1082
957
_exit(EX_UNAVAILABLE);
1083
958
}
1084
close(helperdir_fd);
959
TEMP_FAILURE_RETRY(close(helperdir_fd));
1085
960
#ifdef __GNUC__
1086
961
#pragma GCC diagnostic push
1087
962
#pragma GCC diagnostic ignored "-Wcast-qual"
1206
1081
bool match = false;
1207
1082
{
1208
1083
char *interface = NULL;
1209
while((interface = argz_next(mc->interfaces,
1210
mc->interfaces_size,
1211
interface))){
1084
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1085
interface))){
1212
1086
if(if_nametoindex(interface) == (unsigned int)if_index){
1213
1087
match = true;
1214
1088
break;
1256
1130
goto mandos_end;
1257
1131
}
1258
1132
1133
memset(&to, 0, sizeof(to));
1259
1134
if(af == AF_INET6){
1260
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1261
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1262
ret = inet_pton(af, ip, &to6->sin6_addr);
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1263
1137
} else { /* IPv4 */
1264
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1265
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1266
ret = inet_pton(af, ip, &to4->sin_addr);
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1267
1140
}
1268
1141
if(ret < 0 ){
1269
1142
int e = errno;
1348
1221
sizeof(struct sockaddr_in));
1349
1222
}
1350
1223
if(ret < 0){
1351
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1224
if(errno == ENETUNREACH
1352
1225
and if_index != AVAHI_IF_UNSPEC
1353
1226
and connect_to == NULL
1354
1227
and not route_added and
1367
1240
with an explicit route added with the server's address.
1368
1241
1369
1242
Avahi bug reference:
1370
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1243
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1371
1244
https://bugs.debian.org/587961
1372
1245
*/
1373
1246
if(debug){
1553
1426
&decrypted_buffer, mc);
1554
1427
if(decrypted_buffer_size >= 0){
1555
1428
1556
clearerr(stdout);
1557
1429
written = 0;
1558
1430
while(written < (size_t) decrypted_buffer_size){
1559
1431
if(quit_now){
1575
1447
}
1576
1448
written += (size_t)ret;
1577
1449
}
1578
ret = fflush(stdout);
1579
if(ret != 0){
1580
int e = errno;
1581
if(debug){
1582
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1583
strerror(errno));
1584
}
1585
errno = e;
1586
goto mandos_end;
1587
}
1588
1450
retval = 0;
1589
1451
}
1590
1452
}
1603
1465
free(decrypted_buffer);
1604
1466
free(buffer);
1605
1467
if(tcp_sd >= 0){
1606
ret = close(tcp_sd);
1468
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1607
1469
}
1608
1470
if(ret == -1){
1609
1471
if(e == 0){
1621
1483
return retval;
1622
1484
}
1623
1485
1486
__attribute__((nonnull))
1624
1487
static void resolve_callback(AvahiSServiceResolver *r,
1625
1488
AvahiIfIndex interface,
1626
1489
AvahiProtocol proto,
1763
1626
__attribute__((nonnull, warn_unused_result))
1764
1627
bool get_flags(const char *ifname, struct ifreq *ifr){
1765
1628
int ret;
1766
int old_errno;
1629
error_t ret_errno;
1767
1630
1768
1631
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1769
1632
if(s < 0){
1770
old_errno = errno;
1633
ret_errno = errno;
1771
1634
perror_plus("socket");
1772
errno = old_errno;
1635
errno = ret_errno;
1773
1636
return false;
1774
1637
}
1775
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1776
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1638
strcpy(ifr->ifr_name, ifname);
1777
1639
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1778
1640
if(ret == -1){
1779
1641
if(debug){
1780
old_errno = errno;
1642
ret_errno = errno;
1781
1643
perror_plus("ioctl SIOCGIFFLAGS");
1782
errno = old_errno;
1783
}
1784
if((close(s) == -1) and debug){
1785
old_errno = errno;
1786
perror_plus("close");
1787
errno = old_errno;
1644
errno = ret_errno;
1788
1645
}
1789
1646
return false;
1790
1647
}
1791
if((close(s) == -1) and debug){
1792
old_errno = errno;
1793
perror_plus("close");
1794
errno = old_errno;
1795
}
1796
1648
return true;
1797
1649
}
1798
1650
2059
1911
return;
2060
1912
}
2061
1913
}
2062
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
2063
if(devnull == -1){
2064
perror_plus("open(\"/dev/null\", O_RDONLY)");
2065
return;
2066
}
1914
#ifdef __GLIBC__
1915
#if __GLIBC_PREREQ(2, 15)
2067
1916
int numhooks = scandirat(hookdir_fd, ".", &direntries,
2068
1917
runnable_hook, alphasort);
1918
#else /* not __GLIBC_PREREQ(2, 15) */
1919
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1920
alphasort);
1921
#endif /* not __GLIBC_PREREQ(2, 15) */
1922
#else /* not __GLIBC__ */
1923
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1924
alphasort);
1925
#endif /* not __GLIBC__ */
2069
1926
if(numhooks == -1){
2070
1927
perror_plus("scandir");
2071
close(devnull);
2072
1928
return;
2073
1929
}
2074
1930
struct dirent *direntry;
2075
1931
int ret;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1933
if(devnull == -1){
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1935
return;
1936
}
2076
1937
for(int i = 0; i < numhooks; i++){
2077
1938
direntry = direntries[i];
2078
1939
if(debug){
2149
2010
perror_plus("openat");
2150
2011
_exit(EXIT_FAILURE);
2151
2012
}
2152
if(close(hookdir_fd) == -1){
2013
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2153
2014
perror_plus("close");
2154
2015
_exit(EXIT_FAILURE);
2155
2016
}
2158
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2159
2020
_exit(EX_OSERR);
2160
2021
}
2161
ret = close(devnull);
2022
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2162
2023
if(ret == -1){
2163
2024
perror_plus("close");
2164
2025
_exit(EX_OSERR);
2213
2074
free(direntry);
2214
2075
}
2215
2076
free(direntries);
2216
if(close(hookdir_fd) == -1){
2077
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2217
2078
perror_plus("close");
2218
2079
} else {
2219
2080
hookdir_fd = -1;
2222
2083
}
2223
2084
2224
2085
__attribute__((nonnull, warn_unused_result))
2225
int bring_up_interface(const char *const interface,
2226
const float delay){
2227
int old_errno = errno;
2086
error_t bring_up_interface(const char *const interface,
2087
const float delay){
2088
error_t old_errno = errno;
2228
2089
int ret;
2229
2090
struct ifreq network;
2230
2091
unsigned int if_index = if_nametoindex(interface);
2240
2101
}
2241
2102
2242
2103
if(not interface_is_up(interface)){
2243
int ret_errno = 0;
2244
int ioctl_errno = 0;
2104
error_t ret_errno = 0, ioctl_errno = 0;
2245
2105
if(not get_flags(interface, &network)){
2246
2106
ret_errno = errno;
2247
2107
fprintf_plus(stderr, "Failed to get flags for interface "
2260
2120
}
2261
2121
2262
2122
if(quit_now){
2263
ret = close(sd);
2123
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2264
2124
if(ret == -1){
2265
2125
perror_plus("close");
2266
2126
}
2316
2176
}
2317
2177
2318
2178
/* Close the socket */
2319
ret = close(sd);
2179
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2320
2180
if(ret == -1){
2321
2181
perror_plus("close");
2322
2182
}
2334
2194
2335
2195
/* Sleep checking until interface is running.
2336
2196
Check every 0.25s, up to total time of delay */
2337
for(int i = 0; i < delay * 4; i++){
2197
for(int i=0; i < delay * 4; i++){
2338
2198
if(interface_is_running(interface)){
2339
2199
break;
2340
2200
}
2350
2210
}
2351
2211
2352
2212
__attribute__((nonnull, warn_unused_result))
2353
int take_down_interface(const char *const interface){
2354
int old_errno = errno;
2213
error_t take_down_interface(const char *const interface){
2214
error_t old_errno = errno;
2355
2215
struct ifreq network;
2356
2216
unsigned int if_index = if_nametoindex(interface);
2357
2217
if(if_index == 0){
2360
2220
return ENXIO;
2361
2221
}
2362
2222
if(interface_is_up(interface)){
2363
int ret_errno = 0;
2364
int ioctl_errno = 0;
2223
error_t ret_errno = 0, ioctl_errno = 0;
2365
2224
if(not get_flags(interface, &network) and debug){
2366
2225
ret_errno = errno;
2367
2226
fprintf_plus(stderr, "Failed to get flags for interface "
2405
2264
}
2406
2265
2407
2266
/* Close the socket */
2408
int ret = close(sd);
2267
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2409
2268
if(ret == -1){
2410
2269
perror_plus("close");
2411
2270
}
2427
2286
2428
2287
int main(int argc, char *argv[]){
2429
2288
mandos_context mc = { .server = NULL, .dh_bits = 0,
2430
.priority = "SECURE256:!CTYPE-X.509"
2431
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2432
.current_server = NULL, .interfaces = NULL,
2433
.interfaces_size = 0 };
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2434
2292
AvahiSServiceBrowser *sb = NULL;
2435
2293
error_t ret_errno;
2436
2294
int ret;
2617
2475
.args_doc = "",
2618
2476
.doc = "Mandos client -- Get and decrypt"
2619
2477
" passwords from a Mandos server" };
2620
ret_errno = argp_parse(&argp, argc, argv,
2621
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2622
switch(ret_errno){
2478
ret = argp_parse(&argp, argc, argv,
2479
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2480
switch(ret){
2623
2481
case 0:
2624
2482
break;
2625
2483
case ENOMEM:
2626
2484
default:
2627
errno = ret_errno;
2485
errno = ret;
2628
2486
perror_plus("argp_parse");
2629
2487
exitcode = EX_OSERR;
2630
2488
goto end;
2636
2494
2637
2495
{
2638
2496
/* Work around Debian bug #633582:
2639
<https://bugs.debian.org/633582> */
2497
<http://bugs.debian.org/633582> */
2640
2498
2641
2499
/* Re-raise privileges */
2642
ret = raise_privileges();
2643
if(ret != 0){
2644
errno = ret;
2500
ret_errno = raise_privileges();
2501
if(ret_errno != 0){
2502
errno = ret_errno;
2645
2503
perror_plus("Failed to raise privileges");
2646
2504
} else {
2647
2505
struct stat st;
2663
2521
}
2664
2522
}
2665
2523
}
2666
close(seckey_fd);
2524
TEMP_FAILURE_RETRY(close(seckey_fd));
2667
2525
}
2668
2526
}
2669
2527
2684
2542
}
2685
2543
}
2686
2544
}
2687
close(pubkey_fd);
2688
}
2689
}
2690
2691
if(dh_params_file != NULL
2692
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2693
int dhparams_fd = open(dh_params_file, O_RDONLY);
2694
if(dhparams_fd == -1){
2695
perror_plus("open");
2696
} else {
2697
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2698
if(ret == -1){
2699
perror_plus("fstat");
2700
} else {
2701
if(S_ISREG(st.st_mode)
2702
and st.st_uid == 0 and st.st_gid == 0){
2703
ret = fchown(dhparams_fd, uid, gid);
2704
if(ret == -1){
2705
perror_plus("fchown");
2706
}
2707
}
2708
}
2709
close(dhparams_fd);
2545
TEMP_FAILURE_RETRY(close(pubkey_fd));
2710
2546
}
2711
2547
}
2712
2548
2713
2549
/* Lower privileges */
2714
ret = lower_privileges();
2715
if(ret != 0){
2716
errno = ret;
2550
ret_errno = lower_privileges();
2551
if(ret_errno != 0){
2552
errno = ret_errno;
2717
2553
perror_plus("Failed to lower privileges");
2718
2554
}
2719
2555
}
2889
2725
errno = bring_up_interface(interface, delay);
2890
2726
if(not interface_was_up){
2891
2727
if(errno != 0){
2892
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2893
" %s\n", interface, strerror(errno));
2728
perror_plus("Failed to bring up interface");
2894
2729
} else {
2895
2730
errno = argz_add(&interfaces_to_take_down,
2896
2731
&interfaces_to_take_down_size,
3047
2882
3048
2883
/* Allocate a new server */
3049
2884
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
3050
&config, NULL, NULL, &ret);
2885
&config, NULL, NULL, &ret_errno);
3051
2886
3052
2887
/* Free the Avahi configuration data */
3053
2888
avahi_server_config_free(&config);
3056
2891
/* Check if creating the Avahi server object succeeded */
3057
2892
if(mc.server == NULL){
3058
2893
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
3059
avahi_strerror(ret));
2894
avahi_strerror(ret_errno));
3060
2895
exitcode = EX_UNAVAILABLE;
3061
2896
goto end;
3062
2897
}
3097
2932
end:
3098
2933
3099
2934
if(debug){
3100
if(signal_received){
3101
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
3102
argv[0], signal_received,
3103
strsignal(signal_received));
3104
} else {
3105
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3106
}
2935
fprintf_plus(stderr, "%s exiting\n", argv[0]);
3107
2936
}
3108
2937
3109
2938
/* Cleanup things */
3120
2949
3121
2950
if(gnutls_initialized){
3122
2951
gnutls_certificate_free_credentials(mc.cred);
2952
gnutls_global_deinit();
3123
2953
gnutls_dh_params_deinit(mc.dh_params);
3124
2954
}
3125
2955
3148
2978
3149
2979
/* Re-raise privileges */
3150
2980
{
3151
ret = raise_privileges();
3152
if(ret != 0){
3153
errno = ret;
2981
ret_errno = raise_privileges();
2982
if(ret_errno != 0){
2983
errno = ret_errno;
3154
2984
perror_plus("Failed to raise privileges");
3155
2985
} else {
3156
2986
3161
2991
/* Take down the network interfaces which were brought up */
3162
2992
{
3163
2993
char *interface = NULL;
3164
while((interface = argz_next(interfaces_to_take_down,
3165
interfaces_to_take_down_size,
3166
interface))){
3167
ret = take_down_interface(interface);
3168
if(ret != 0){
3169
errno = ret;
2994
while((interface=argz_next(interfaces_to_take_down,
2995
interfaces_to_take_down_size,
2996
interface))){
2997
ret_errno = take_down_interface(interface);
2998
if(ret_errno != 0){
2999
errno = ret_errno;
3170
3000
perror_plus("Failed to take down interface");
3171
3001
}
3172
3002
}
3177
3007
}
3178
3008
}
3179
3009
3180
ret = lower_privileges_permanently();
3181
if(ret != 0){
3182
errno = ret;
3010
ret_errno = lower_privileges_permanently();
3011
if(ret_errno != 0){
3012
errno = ret_errno;
3183
3013
perror_plus("Failed to lower privileges permanently");
3184
3014
}
3185
3015
}
3187
3017
free(interfaces_to_take_down);
3188
3018
free(interfaces_hooks);
3189
3019
3190
void clean_dir_at(int base, const char * const dirname,
3191
uintmax_t level){
3192
struct dirent **direntries = NULL;
3193
int dret;
3194
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3195
O_RDONLY
3196
| O_NOFOLLOW
3197
| O_DIRECTORY
3198
| O_PATH));
3199
if(dir_fd == -1){
3200
perror_plus("open");
3201
return;
3202
}
3203
int numentries = scandirat(dir_fd, ".", &direntries,
3204
notdotentries, alphasort);
3205
if(numentries >= 0){
3206
for(int i = 0; i < numentries; i++){
3207
if(debug){
3208
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3209
dirname, direntries[i]->d_name);
3210
}
3211
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3212
if(dret == -1){
3213
if(errno == EISDIR){
3214
dret = unlinkat(dir_fd, direntries[i]->d_name,
3215
AT_REMOVEDIR);
3216
}
3217
if((dret == -1) and (errno == ENOTEMPTY)
3218
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3219
== 0) and (level == 0)){
3220
/* Recurse only in this special case */
3221
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3222
dret = 0;
3223
}
3224
if((dret == -1) and (errno != ENOENT)){
3225
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3226
direntries[i]->d_name, strerror(errno));
3227
}
3228
}
3229
free(direntries[i]);
3230
}
3231
3232
/* need to clean even if 0 because man page doesn't specify */
3233
free(direntries);
3234
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3235
if(dret == -1 and errno != ENOENT){
3236
perror_plus("rmdir");
3237
}
3238
} else {
3239
perror_plus("scandirat");
3240
}
3241
close(dir_fd);
3242
}
3243
3244
3020
/* Removes the GPGME temp directory and all files inside */
3245
3021
if(tempdir != NULL){
3246
clean_dir_at(-1, tempdir, 0);
3022
struct dirent **direntries = NULL;
3023
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3024
| O_NOFOLLOW
3025
| O_DIRECTORY
3026
| O_PATH));
3027
if(tempdir_fd == -1){
3028
perror_plus("open");
3029
} else {
3030
#ifdef __GLIBC__
3031
#if __GLIBC_PREREQ(2, 15)
3032
int numentries = scandirat(tempdir_fd, ".", &direntries,
3033
notdotentries, alphasort);
3034
#else /* not __GLIBC_PREREQ(2, 15) */
3035
int numentries = scandir(tempdir, &direntries, notdotentries,
3036
alphasort);
3037
#endif /* not __GLIBC_PREREQ(2, 15) */
3038
#else /* not __GLIBC__ */
3039
int numentries = scandir(tempdir, &direntries, notdotentries,
3040
alphasort);
3041
#endif /* not __GLIBC__ */
3042
if(numentries >= 0){
3043
for(int i = 0; i < numentries; i++){
3044
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3045
if(ret == -1){
3046
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3047
" \"%s\", 0): %s\n", tempdir,
3048
direntries[i]->d_name, strerror(errno));
3049
}
3050
free(direntries[i]);
3051
}
3052
3053
/* need to clean even if 0 because man page doesn't specify */
3054
free(direntries);
3055
if(numentries == -1){
3056
perror_plus("scandir");
3057
}
3058
ret = rmdir(tempdir);
3059
if(ret == -1 and errno != ENOENT){
3060
perror_plus("rmdir");
3061
}
3062
}
3063
TEMP_FAILURE_RETRY(close(tempdir_fd));
3064
}
3247
3065
}
3248
3066
3249
3067
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0