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- Committer: Teddy Hogeborn
- Date: 2015-07-05 21:38:01 UTC
- mto: This revision was merged to the branch mainline in revision 759.
- Revision ID: teddy@recompile.se-20150705213801-pi8vk0ovlumuj826
plugin-helpers/mandos-client-iprouteadddel.c: Fix #include lines.
(main): Fix minor typo in error message.
(main): Fix minor typo in error message.
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,
311
305
return false;
312
306
}
313
307
314
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
315
309
if(ret == -1){
316
310
perror_plus("close");
317
311
}
499
493
return plaintext_length;
500
494
}
501
495
502
__attribute__((warn_unused_result, const))
503
static const char *safe_string(const char *str){
504
if(str == NULL)
505
return "(unknown)";
506
return str;
507
}
508
509
496
__attribute__((warn_unused_result))
510
497
static const char *safer_gnutls_strerror(int value){
511
498
const char *ret = gnutls_strerror(value);
512
return safe_string(ret);
499
if(ret == NULL)
500
ret = "(unknown)";
501
return ret;
513
502
}
514
503
515
504
/* GnuTLS log function callback */
519
508
fprintf_plus(stderr, "GnuTLS: %s", string);
520
509
}
521
510
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
511
__attribute__((nonnull, warn_unused_result))
523
512
static int init_gnutls_global(const char *pubkeyfilename,
524
513
const char *seckeyfilename,
525
const char *dhparamsfilename,
526
514
mandos_context *mc){
527
515
int ret;
528
unsigned int uret;
529
516
530
517
if(debug){
531
518
fprintf_plus(stderr, "Initializing GnuTLS\n");
532
519
}
533
520
521
ret = gnutls_global_init();
522
if(ret != GNUTLS_E_SUCCESS){
523
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
524
safer_gnutls_strerror(ret));
525
return -1;
526
}
527
534
528
if(debug){
535
529
/* "Use a log level over 10 to enable all debugging options."
536
530
* - GnuTLS manual
544
538
if(ret != GNUTLS_E_SUCCESS){
545
539
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
540
safer_gnutls_strerror(ret));
541
gnutls_global_deinit();
547
542
return -1;
548
543
}
549
544
574
569
safer_gnutls_strerror(ret));
575
570
goto globalfail;
576
571
}
577
/* If a Diffie-Hellman parameters file was given, try to use it */
578
if(dhparamsfilename != NULL){
579
gnutls_datum_t params = { .data = NULL, .size = 0 };
580
do {
581
int dhpfile = open(dhparamsfilename, O_RDONLY);
582
if(dhpfile == -1){
583
perror_plus("open");
584
dhparamsfilename = NULL;
585
break;
586
}
587
size_t params_capacity = 0;
588
while(true){
589
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params.size,
591
(size_t)params_capacity);
592
if(params_capacity == 0){
593
perror_plus("incbuffer");
594
free(params.data);
595
params.data = NULL;
596
dhparamsfilename = NULL;
597
break;
598
}
599
ssize_t bytes_read = read(dhpfile,
600
params.data + params.size,
601
BUFFER_SIZE);
602
/* EOF */
603
if(bytes_read == 0){
604
break;
605
}
606
/* check bytes_read for failure */
607
if(bytes_read < 0){
608
perror_plus("read");
609
free(params.data);
610
params.data = NULL;
611
dhparamsfilename = NULL;
612
break;
613
}
614
params.size += (unsigned int)bytes_read;
615
}
616
close(dhpfile);
617
if(params.data == NULL){
618
dhparamsfilename = NULL;
619
}
620
if(dhparamsfilename == NULL){
621
break;
622
}
623
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
624
GNUTLS_X509_FMT_PEM);
625
if(ret != GNUTLS_E_SUCCESS){
626
fprintf_plus(stderr, "Failed to parse DH parameters in file"
627
" \"%s\": %s\n", dhparamsfilename,
628
safer_gnutls_strerror(ret));
629
dhparamsfilename = NULL;
630
}
631
free(params.data);
632
} while(false);
633
}
634
if(dhparamsfilename == NULL){
635
if(mc->dh_bits == 0){
636
/* Find out the optimal number of DH bits */
637
/* Try to read the private key file */
638
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
639
do {
640
int secfile = open(seckeyfilename, O_RDONLY);
641
if(secfile == -1){
642
perror_plus("open");
643
break;
644
}
645
size_t buffer_capacity = 0;
646
while(true){
647
buffer_capacity = incbuffer((char **)&buffer.data,
648
(size_t)buffer.size,
649
(size_t)buffer_capacity);
650
if(buffer_capacity == 0){
651
perror_plus("incbuffer");
652
free(buffer.data);
653
buffer.data = NULL;
654
break;
655
}
656
ssize_t bytes_read = read(secfile,
657
buffer.data + buffer.size,
658
BUFFER_SIZE);
659
/* EOF */
660
if(bytes_read == 0){
661
break;
662
}
663
/* check bytes_read for failure */
664
if(bytes_read < 0){
665
perror_plus("read");
666
free(buffer.data);
667
buffer.data = NULL;
668
break;
669
}
670
buffer.size += (unsigned int)bytes_read;
671
}
672
close(secfile);
673
} while(false);
674
/* If successful, use buffer to parse private key */
675
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
676
if(buffer.data != NULL){
677
{
678
gnutls_openpgp_privkey_t privkey = NULL;
679
ret = gnutls_openpgp_privkey_init(&privkey);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error initializing OpenPGP key"
682
" structure: %s",
683
safer_gnutls_strerror(ret));
684
free(buffer.data);
685
buffer.data = NULL;
686
} else {
687
ret = gnutls_openpgp_privkey_import
688
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
689
if(ret != GNUTLS_E_SUCCESS){
690
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
691
safer_gnutls_strerror(ret));
692
privkey = NULL;
693
}
694
free(buffer.data);
695
buffer.data = NULL;
696
if(privkey != NULL){
697
/* Use private key to suggest an appropriate
698
sec_param */
699
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
700
gnutls_openpgp_privkey_deinit(privkey);
701
if(debug){
702
fprintf_plus(stderr, "This OpenPGP key implies using"
703
" a GnuTLS security parameter \"%s\".\n",
704
safe_string(gnutls_sec_param_get_name
705
(sec_param)));
706
}
707
}
708
}
709
}
710
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
711
/* Err on the side of caution */
712
sec_param = GNUTLS_SEC_PARAM_ULTRA;
713
if(debug){
714
fprintf_plus(stderr, "Falling back to security parameter"
715
" \"%s\"\n",
716
safe_string(gnutls_sec_param_get_name
717
(sec_param)));
718
}
719
}
720
}
721
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
722
if(uret != 0){
723
mc->dh_bits = uret;
724
if(debug){
725
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
726
" implies %u DH bits; using that.\n",
727
safe_string(gnutls_sec_param_get_name
728
(sec_param)),
729
mc->dh_bits);
730
}
731
} else {
732
fprintf_plus(stderr, "Failed to get implied number of DH"
733
" bits for security parameter \"%s\"): %s\n",
734
safe_string(gnutls_sec_param_get_name
735
(sec_param)),
736
safer_gnutls_strerror(ret));
737
goto globalfail;
738
}
739
} else if(debug){
740
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
741
mc->dh_bits);
742
}
743
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
744
if(ret != GNUTLS_E_SUCCESS){
745
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
746
" bits): %s\n", mc->dh_bits,
747
safer_gnutls_strerror(ret));
748
goto globalfail;
749
}
750
}
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
573
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
575
safer_gnutls_strerror(ret));
576
goto globalfail;
577
}
578
751
579
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
752
580
753
581
return 0;
755
583
globalfail:
756
584
757
585
gnutls_certificate_free_credentials(mc->cred);
586
gnutls_global_deinit();
758
587
gnutls_dh_params_deinit(mc->dh_params);
759
588
return -1;
760
589
}
812
641
/* ignore client certificate if any. */
813
642
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
814
643
644
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
645
815
646
return 0;
816
647
}
817
648
821
652
822
653
/* Set effective uid to 0, return errno */
823
654
__attribute__((warn_unused_result))
824
int raise_privileges(void){
825
int old_errno = errno;
826
int ret = 0;
655
error_t raise_privileges(void){
656
error_t old_errno = errno;
657
error_t ret_errno = 0;
827
658
if(seteuid(0) == -1){
828
ret = errno;
659
ret_errno = errno;
829
660
}
830
661
errno = old_errno;
831
return ret;
662
return ret_errno;
832
663
}
833
664
834
665
/* Set effective and real user ID to 0. Return errno. */
835
666
__attribute__((warn_unused_result))
836
int raise_privileges_permanently(void){
837
int old_errno = errno;
838
int ret = raise_privileges();
839
if(ret != 0){
667
error_t raise_privileges_permanently(void){
668
error_t old_errno = errno;
669
error_t ret_errno = raise_privileges();
670
if(ret_errno != 0){
840
671
errno = old_errno;
841
return ret;
672
return ret_errno;
842
673
}
843
674
if(setuid(0) == -1){
844
ret = errno;
675
ret_errno = errno;
845
676
}
846
677
errno = old_errno;
847
return ret;
678
return ret_errno;
848
679
}
849
680
850
681
/* Set effective user ID to unprivileged saved user ID */
851
682
__attribute__((warn_unused_result))
852
int lower_privileges(void){
853
int old_errno = errno;
854
int ret = 0;
683
error_t lower_privileges(void){
684
error_t old_errno = errno;
685
error_t ret_errno = 0;
855
686
if(seteuid(uid) == -1){
856
ret = errno;
687
ret_errno = errno;
857
688
}
858
689
errno = old_errno;
859
return ret;
690
return ret_errno;
860
691
}
861
692
862
693
/* Lower privileges permanently */
863
694
__attribute__((warn_unused_result))
864
int lower_privileges_permanently(void){
865
int old_errno = errno;
866
int ret = 0;
695
error_t lower_privileges_permanently(void){
696
error_t old_errno = errno;
697
error_t ret_errno = 0;
867
698
if(setuid(uid) == -1){
868
ret = errno;
699
ret_errno = errno;
869
700
}
870
701
errno = old_errno;
871
return ret;
702
return ret_errno;
872
703
}
873
704
874
/* Helper function to add_local_route() and delete_local_route() */
705
/* Helper function to add_local_route() and remove_local_route() */
875
706
__attribute__((nonnull, warn_unused_result))
876
static bool add_delete_local_route(const bool add,
707
static bool add_remove_local_route(const bool add,
877
708
const char *address,
878
709
AvahiIfIndex if_index){
879
710
int ret;
880
711
char helper[] = "mandos-client-iprouteadddel";
881
712
char add_arg[] = "add";
882
713
char delete_arg[] = "delete";
883
char debug_flag[] = "--debug";
884
714
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
885
715
if(pluginhelperdir == NULL){
886
716
if(debug){
930
760
perror_plus("dup2(devnull, STDIN_FILENO)");
931
761
_exit(EX_OSERR);
932
762
}
933
ret = close(devnull);
763
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
934
764
if(ret == -1){
935
765
perror_plus("close");
936
766
_exit(EX_OSERR);
953
783
helper, O_RDONLY));
954
784
if(helper_fd == -1){
955
785
perror_plus("openat");
956
close(helperdir_fd);
957
786
_exit(EX_UNAVAILABLE);
958
787
}
959
close(helperdir_fd);
788
TEMP_FAILURE_RETRY(close(helperdir_fd));
960
789
#ifdef __GNUC__
961
790
#pragma GCC diagnostic push
962
791
#pragma GCC diagnostic ignored "-Wcast-qual"
963
792
#endif
964
793
if(fexecve(helper_fd, (char *const [])
965
794
{ helper, add ? add_arg : delete_arg, (char *)address,
966
interface, debug ? debug_flag : NULL, NULL },
967
environ) == -1){
795
interface, NULL }, environ) == -1){
968
796
#ifdef __GNUC__
969
797
#pragma GCC diagnostic pop
970
798
#endif
1022
850
__attribute__((nonnull, warn_unused_result))
1023
851
static bool add_local_route(const char *address,
1024
852
AvahiIfIndex if_index){
1025
if(debug){
1026
fprintf_plus(stderr, "Adding route to %s\n", address);
1027
}
1028
return add_delete_local_route(true, address, if_index);
853
return add_remove_local_route(true, address, if_index);
1029
854
}
1030
855
1031
856
__attribute__((nonnull, warn_unused_result))
1032
static bool delete_local_route(const char *address,
857
static bool remove_local_route(const char *address,
1033
858
AvahiIfIndex if_index){
1034
if(debug){
1035
fprintf_plus(stderr, "Removing route to %s\n", address);
1036
}
1037
return add_delete_local_route(false, address, if_index);
859
return add_remove_local_route(false, address, if_index);
1038
860
}
1039
861
1040
862
/* Called when a Mandos server is found */
1081
903
bool match = false;
1082
904
{
1083
905
char *interface = NULL;
1084
while((interface = argz_next(mc->interfaces,
1085
mc->interfaces_size,
1086
interface))){
906
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
907
interface))){
1087
908
if(if_nametoindex(interface) == (unsigned int)if_index){
1088
909
match = true;
1089
910
break;
1131
952
goto mandos_end;
1132
953
}
1133
954
955
memset(&to, 0, sizeof(to));
1134
956
if(af == AF_INET6){
1135
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1136
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1137
ret = inet_pton(af, ip, &to6->sin6_addr);
957
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
958
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1138
959
} else { /* IPv4 */
1139
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1140
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1141
ret = inet_pton(af, ip, &to4->sin_addr);
960
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
961
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1142
962
}
1143
963
if(ret < 0 ){
1144
964
int e = errno;
1223
1043
sizeof(struct sockaddr_in));
1224
1044
}
1225
1045
if(ret < 0){
1226
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1046
if(errno == ENETUNREACH
1227
1047
and if_index != AVAHI_IF_UNSPEC
1228
1048
and connect_to == NULL
1229
1049
and not route_added and
1242
1062
with an explicit route added with the server's address.
1243
1063
1244
1064
Avahi bug reference:
1245
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1065
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1246
1066
https://bugs.debian.org/587961
1247
1067
*/
1248
if(debug){
1249
fprintf_plus(stderr, "Mandos server unreachable, trying"
1250
" direct route\n");
1251
}
1252
1068
int e = errno;
1253
1069
route_added = add_local_route(ip, if_index);
1254
1070
if(route_added){
1428
1244
&decrypted_buffer, mc);
1429
1245
if(decrypted_buffer_size >= 0){
1430
1246
1431
clearerr(stdout);
1432
1247
written = 0;
1433
1248
while(written < (size_t) decrypted_buffer_size){
1434
1249
if(quit_now){
1450
1265
}
1451
1266
written += (size_t)ret;
1452
1267
}
1453
ret = fflush(stdout);
1454
if(ret != 0){
1455
int e = errno;
1456
if(debug){
1457
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1458
strerror(errno));
1459
}
1460
errno = e;
1461
goto mandos_end;
1462
}
1463
1268
retval = 0;
1464
1269
}
1465
1270
}
1469
1274
mandos_end:
1470
1275
{
1471
1276
if(route_added){
1472
if(not delete_local_route(ip, if_index)){
1473
fprintf_plus(stderr, "Failed to delete local route to %s on"
1277
if(not remove_local_route(ip, if_index)){
1278
fprintf_plus(stderr, "Failed to remove local route to %s on"
1474
1279
" interface %d", ip, if_index);
1475
1280
}
1476
1281
}
1478
1283
free(decrypted_buffer);
1479
1284
free(buffer);
1480
1285
if(tcp_sd >= 0){
1481
ret = close(tcp_sd);
1286
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1482
1287
}
1483
1288
if(ret == -1){
1484
1289
if(e == 0){
1496
1301
return retval;
1497
1302
}
1498
1303
1304
__attribute__((nonnull))
1499
1305
static void resolve_callback(AvahiSServiceResolver *r,
1500
1306
AvahiIfIndex interface,
1501
1307
AvahiProtocol proto,
1638
1444
__attribute__((nonnull, warn_unused_result))
1639
1445
bool get_flags(const char *ifname, struct ifreq *ifr){
1640
1446
int ret;
1641
int old_errno;
1447
error_t ret_errno;
1642
1448
1643
1449
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1644
1450
if(s < 0){
1645
old_errno = errno;
1451
ret_errno = errno;
1646
1452
perror_plus("socket");
1647
errno = old_errno;
1453
errno = ret_errno;
1648
1454
return false;
1649
1455
}
1650
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1651
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1456
strcpy(ifr->ifr_name, ifname);
1652
1457
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1653
1458
if(ret == -1){
1654
1459
if(debug){
1655
old_errno = errno;
1460
ret_errno = errno;
1656
1461
perror_plus("ioctl SIOCGIFFLAGS");
1657
errno = old_errno;
1462
errno = ret_errno;
1658
1463
}
1659
close(s);
1660
1464
return false;
1661
1465
}
1662
close(s);
1663
1466
return true;
1664
1467
}
1665
1468
1926
1729
return;
1927
1730
}
1928
1731
}
1929
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1930
if(devnull == -1){
1931
perror_plus("open(\"/dev/null\", O_RDONLY)");
1932
return;
1933
}
1732
#ifdef __GLIBC__
1733
#if __GLIBC_PREREQ(2, 15)
1934
1734
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1935
1735
runnable_hook, alphasort);
1736
#else /* not __GLIBC_PREREQ(2, 15) */
1737
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1738
alphasort);
1739
#endif /* not __GLIBC_PREREQ(2, 15) */
1740
#else /* not __GLIBC__ */
1741
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1742
alphasort);
1743
#endif /* not __GLIBC__ */
1936
1744
if(numhooks == -1){
1937
1745
perror_plus("scandir");
1938
close(devnull);
1939
1746
return;
1940
1747
}
1941
1748
struct dirent *direntry;
1942
1749
int ret;
1750
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1751
if(devnull == -1){
1752
perror_plus("open(\"/dev/null\", O_RDONLY)");
1753
return;
1754
}
1943
1755
for(int i = 0; i < numhooks; i++){
1944
1756
direntry = direntries[i];
1945
1757
if(debug){
2016
1828
perror_plus("openat");
2017
1829
_exit(EXIT_FAILURE);
2018
1830
}
2019
if(close(hookdir_fd) == -1){
1831
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2020
1832
perror_plus("close");
2021
1833
_exit(EXIT_FAILURE);
2022
1834
}
2025
1837
perror_plus("dup2(devnull, STDIN_FILENO)");
2026
1838
_exit(EX_OSERR);
2027
1839
}
2028
ret = close(devnull);
1840
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2029
1841
if(ret == -1){
2030
1842
perror_plus("close");
2031
1843
_exit(EX_OSERR);
2080
1892
free(direntry);
2081
1893
}
2082
1894
free(direntries);
2083
if(close(hookdir_fd) == -1){
1895
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2084
1896
perror_plus("close");
2085
1897
} else {
2086
1898
hookdir_fd = -1;
2089
1901
}
2090
1902
2091
1903
__attribute__((nonnull, warn_unused_result))
2092
int bring_up_interface(const char *const interface,
2093
const float delay){
2094
int old_errno = errno;
1904
error_t bring_up_interface(const char *const interface,
1905
const float delay){
1906
error_t old_errno = errno;
2095
1907
int ret;
2096
1908
struct ifreq network;
2097
1909
unsigned int if_index = if_nametoindex(interface);
2107
1919
}
2108
1920
2109
1921
if(not interface_is_up(interface)){
2110
int ret_errno = 0;
2111
int ioctl_errno = 0;
1922
error_t ret_errno = 0, ioctl_errno = 0;
2112
1923
if(not get_flags(interface, &network)){
2113
1924
ret_errno = errno;
2114
1925
fprintf_plus(stderr, "Failed to get flags for interface "
2127
1938
}
2128
1939
2129
1940
if(quit_now){
2130
ret = close(sd);
1941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2131
1942
if(ret == -1){
2132
1943
perror_plus("close");
2133
1944
}
2183
1994
}
2184
1995
2185
1996
/* Close the socket */
2186
ret = close(sd);
1997
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2187
1998
if(ret == -1){
2188
1999
perror_plus("close");
2189
2000
}
2201
2012
2202
2013
/* Sleep checking until interface is running.
2203
2014
Check every 0.25s, up to total time of delay */
2204
for(int i = 0; i < delay * 4; i++){
2015
for(int i=0; i < delay * 4; i++){
2205
2016
if(interface_is_running(interface)){
2206
2017
break;
2207
2018
}
2217
2028
}
2218
2029
2219
2030
__attribute__((nonnull, warn_unused_result))
2220
int take_down_interface(const char *const interface){
2221
int old_errno = errno;
2031
error_t take_down_interface(const char *const interface){
2032
error_t old_errno = errno;
2222
2033
struct ifreq network;
2223
2034
unsigned int if_index = if_nametoindex(interface);
2224
2035
if(if_index == 0){
2227
2038
return ENXIO;
2228
2039
}
2229
2040
if(interface_is_up(interface)){
2230
int ret_errno = 0;
2231
int ioctl_errno = 0;
2041
error_t ret_errno = 0, ioctl_errno = 0;
2232
2042
if(not get_flags(interface, &network) and debug){
2233
2043
ret_errno = errno;
2234
2044
fprintf_plus(stderr, "Failed to get flags for interface "
2272
2082
}
2273
2083
2274
2084
/* Close the socket */
2275
int ret = close(sd);
2085
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2276
2086
if(ret == -1){
2277
2087
perror_plus("close");
2278
2088
}
2293
2103
}
2294
2104
2295
2105
int main(int argc, char *argv[]){
2296
mandos_context mc = { .server = NULL, .dh_bits = 0,
2297
.priority = "SECURE256:!CTYPE-X.509"
2298
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2299
.current_server = NULL, .interfaces = NULL,
2300
.interfaces_size = 0 };
2106
mandos_context mc = { .server = NULL, .dh_bits = 1024,
2107
.priority = "SECURE256:!CTYPE-X.509:"
2108
"+CTYPE-OPENPGP", .current_server = NULL,
2109
.interfaces = NULL, .interfaces_size = 0 };
2301
2110
AvahiSServiceBrowser *sb = NULL;
2302
2111
error_t ret_errno;
2303
2112
int ret;
2312
2121
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2313
2122
const char *seckey = PATHDIR "/" SECKEY;
2314
2123
const char *pubkey = PATHDIR "/" PUBKEY;
2315
const char *dh_params_file = NULL;
2316
2124
char *interfaces_hooks = NULL;
2317
2125
2318
2126
bool gnutls_initialized = false;
2371
2179
.doc = "Bit length of the prime number used in the"
2372
2180
" Diffie-Hellman key exchange",
2373
2181
.group = 2 },
2374
{ .name = "dh-params", .key = 134,
2375
.arg = "FILE",
2376
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2377
" for the Diffie-Hellman key exchange",
2378
.group = 2 },
2379
2182
{ .name = "priority", .key = 130,
2380
2183
.arg = "STRING",
2381
2184
.doc = "GnuTLS priority string for the TLS handshake",
2436
2239
}
2437
2240
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2438
2241
break;
2439
case 134: /* --dh-params */
2440
dh_params_file = arg;
2441
break;
2442
2242
case 130: /* --priority */
2443
2243
mc.priority = arg;
2444
2244
break;
2484
2284
.args_doc = "",
2485
2285
.doc = "Mandos client -- Get and decrypt"
2486
2286
" passwords from a Mandos server" };
2487
ret_errno = argp_parse(&argp, argc, argv,
2488
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2489
switch(ret_errno){
2287
ret = argp_parse(&argp, argc, argv,
2288
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2289
switch(ret){
2490
2290
case 0:
2491
2291
break;
2492
2292
case ENOMEM:
2493
2293
default:
2494
errno = ret_errno;
2294
errno = ret;
2495
2295
perror_plus("argp_parse");
2496
2296
exitcode = EX_OSERR;
2497
2297
goto end;
2503
2303
2504
2304
{
2505
2305
/* Work around Debian bug #633582:
2506
<https://bugs.debian.org/633582> */
2306
<http://bugs.debian.org/633582> */
2507
2307
2508
2308
/* Re-raise privileges */
2509
ret = raise_privileges();
2510
if(ret != 0){
2511
errno = ret;
2309
ret_errno = raise_privileges();
2310
if(ret_errno != 0){
2311
errno = ret_errno;
2512
2312
perror_plus("Failed to raise privileges");
2513
2313
} else {
2514
2314
struct stat st;
2530
2330
}
2531
2331
}
2532
2332
}
2533
close(seckey_fd);
2333
TEMP_FAILURE_RETRY(close(seckey_fd));
2534
2334
}
2535
2335
}
2536
2336
2551
2351
}
2552
2352
}
2553
2353
}
2554
close(pubkey_fd);
2555
}
2556
}
2557
2558
if(dh_params_file != NULL
2559
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2560
int dhparams_fd = open(dh_params_file, O_RDONLY);
2561
if(dhparams_fd == -1){
2562
perror_plus("open");
2563
} else {
2564
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2565
if(ret == -1){
2566
perror_plus("fstat");
2567
} else {
2568
if(S_ISREG(st.st_mode)
2569
and st.st_uid == 0 and st.st_gid == 0){
2570
ret = fchown(dhparams_fd, uid, gid);
2571
if(ret == -1){
2572
perror_plus("fchown");
2573
}
2574
}
2575
}
2576
close(dhparams_fd);
2354
TEMP_FAILURE_RETRY(close(pubkey_fd));
2577
2355
}
2578
2356
}
2579
2357
2580
2358
/* Lower privileges */
2581
ret = lower_privileges();
2582
if(ret != 0){
2583
errno = ret;
2359
ret_errno = lower_privileges();
2360
if(ret_errno != 0){
2361
errno = ret_errno;
2584
2362
perror_plus("Failed to lower privileges");
2585
2363
}
2586
2364
}
2756
2534
errno = bring_up_interface(interface, delay);
2757
2535
if(not interface_was_up){
2758
2536
if(errno != 0){
2759
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2760
" %s\n", interface, strerror(errno));
2537
perror_plus("Failed to bring up interface");
2761
2538
} else {
2762
2539
errno = argz_add(&interfaces_to_take_down,
2763
2540
&interfaces_to_take_down_size,
2786
2563
goto end;
2787
2564
}
2788
2565
2789
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2566
ret = init_gnutls_global(pubkey, seckey, &mc);
2790
2567
if(ret == -1){
2791
2568
fprintf_plus(stderr, "init_gnutls_global failed\n");
2792
2569
exitcode = EX_UNAVAILABLE;
2914
2691
2915
2692
/* Allocate a new server */
2916
2693
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2917
&config, NULL, NULL, &ret);
2694
&config, NULL, NULL, &ret_errno);
2918
2695
2919
2696
/* Free the Avahi configuration data */
2920
2697
avahi_server_config_free(&config);
2923
2700
/* Check if creating the Avahi server object succeeded */
2924
2701
if(mc.server == NULL){
2925
2702
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2926
avahi_strerror(ret));
2703
avahi_strerror(ret_errno));
2927
2704
exitcode = EX_UNAVAILABLE;
2928
2705
goto end;
2929
2706
}
2964
2741
end:
2965
2742
2966
2743
if(debug){
2967
if(signal_received){
2968
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2969
argv[0], signal_received,
2970
strsignal(signal_received));
2971
} else {
2972
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2973
}
2744
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2974
2745
}
2975
2746
2976
2747
/* Cleanup things */
2987
2758
2988
2759
if(gnutls_initialized){
2989
2760
gnutls_certificate_free_credentials(mc.cred);
2761
gnutls_global_deinit();
2990
2762
gnutls_dh_params_deinit(mc.dh_params);
2991
2763
}
2992
2764
3015
2787
3016
2788
/* Re-raise privileges */
3017
2789
{
3018
ret = raise_privileges();
3019
if(ret != 0){
3020
errno = ret;
2790
ret_errno = raise_privileges();
2791
if(ret_errno != 0){
2792
errno = ret_errno;
3021
2793
perror_plus("Failed to raise privileges");
3022
2794
} else {
3023
2795
3028
2800
/* Take down the network interfaces which were brought up */
3029
2801
{
3030
2802
char *interface = NULL;
3031
while((interface = argz_next(interfaces_to_take_down,
3032
interfaces_to_take_down_size,
3033
interface))){
3034
ret = take_down_interface(interface);
3035
if(ret != 0){
3036
errno = ret;
2803
while((interface=argz_next(interfaces_to_take_down,
2804
interfaces_to_take_down_size,
2805
interface))){
2806
ret_errno = take_down_interface(interface);
2807
if(ret_errno != 0){
2808
errno = ret_errno;
3037
2809
perror_plus("Failed to take down interface");
3038
2810
}
3039
2811
}
3044
2816
}
3045
2817
}
3046
2818
3047
ret = lower_privileges_permanently();
3048
if(ret != 0){
3049
errno = ret;
2819
ret_errno = lower_privileges_permanently();
2820
if(ret_errno != 0){
2821
errno = ret_errno;
3050
2822
perror_plus("Failed to lower privileges permanently");
3051
2823
}
3052
2824
}
3054
2826
free(interfaces_to_take_down);
3055
2827
free(interfaces_hooks);
3056
2828
3057
void clean_dir_at(int base, const char * const dirname,
3058
uintmax_t level){
3059
struct dirent **direntries = NULL;
3060
int dret;
3061
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3062
O_RDONLY
3063
| O_NOFOLLOW
3064
| O_DIRECTORY
3065
| O_PATH));
3066
if(dir_fd == -1){
3067
perror_plus("open");
3068
return;
3069
}
3070
int numentries = scandirat(dir_fd, ".", &direntries,
3071
notdotentries, alphasort);
3072
if(numentries >= 0){
3073
for(int i = 0; i < numentries; i++){
3074
if(debug){
3075
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3076
dirname, direntries[i]->d_name);
3077
}
3078
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3079
if(dret == -1){
3080
if(errno == EISDIR){
3081
dret = unlinkat(dir_fd, direntries[i]->d_name,
3082
AT_REMOVEDIR);
3083
}
3084
if((dret == -1) and (errno == ENOTEMPTY)
3085
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3086
== 0) and (level == 0)){
3087
/* Recurse only in this special case */
3088
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3089
dret = 0;
3090
}
3091
if((dret == -1) and (errno != ENOENT)){
3092
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3093
direntries[i]->d_name, strerror(errno));
3094
}
3095
}
3096
free(direntries[i]);
3097
}
3098
3099
/* need to clean even if 0 because man page doesn't specify */
3100
free(direntries);
3101
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3102
if(dret == -1 and errno != ENOENT){
3103
perror_plus("rmdir");
3104
}
3105
} else {
3106
perror_plus("scandirat");
3107
}
3108
close(dir_fd);
3109
}
3110
3111
2829
/* Removes the GPGME temp directory and all files inside */
3112
2830
if(tempdir != NULL){
3113
clean_dir_at(-1, tempdir, 0);
2831
struct dirent **direntries = NULL;
2832
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2833
| O_NOFOLLOW
2834
| O_DIRECTORY
2835
| O_PATH));
2836
if(tempdir_fd == -1){
2837
perror_plus("open");
2838
} else {
2839
#ifdef __GLIBC__
2840
#if __GLIBC_PREREQ(2, 15)
2841
int numentries = scandirat(tempdir_fd, ".", &direntries,
2842
notdotentries, alphasort);
2843
#else /* not __GLIBC_PREREQ(2, 15) */
2844
int numentries = scandir(tempdir, &direntries, notdotentries,
2845
alphasort);
2846
#endif /* not __GLIBC_PREREQ(2, 15) */
2847
#else /* not __GLIBC__ */
2848
int numentries = scandir(tempdir, &direntries, notdotentries,
2849
alphasort);
2850
#endif /* not __GLIBC__ */
2851
if(numentries >= 0){
2852
for(int i = 0; i < numentries; i++){
2853
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2854
if(ret == -1){
2855
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2856
" \"%s\", 0): %s\n", tempdir,
2857
direntries[i]->d_name, strerror(errno));
2858
}
2859
free(direntries[i]);
2860
}
2861
2862
/* need to clean even if 0 because man page doesn't specify */
2863
free(direntries);
2864
if(numentries == -1){
2865
perror_plus("scandir");
2866
}
2867
ret = rmdir(tempdir);
2868
if(ret == -1 and errno != ENOENT){
2869
perror_plus("rmdir");
2870
}
2871
}
2872
TEMP_FAILURE_RETRY(close(tempdir_fd));
2873
}
3114
2874
}
3115
2875
3116
2876
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0