To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 761
- compare with another revision
- download diff
- download tarball
- view history from revision 761
- Committer: Teddy Hogeborn
- Date: 2015-07-07 15:49:49 UTC
- Revision ID: teddy@recompile.se-20150707154949-vbuj4pc6wf3o1vgz
mandos.service: Use Type=dbus (implicitly).
mandos.service ([Service]/Type): Removed.
([Service]/BusName): Uncommented; set to
"se.recompile.Mandos".
mandos.service ([Service]/Type): Removed.
([Service]/BusName): Uncommented; set to
"se.recompile.Mandos".
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2017 Teddy Hogeborn
13
* Copyright © 2008-2017 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
}
519
513
fprintf_plus(stderr, "GnuTLS: %s", string);
520
514
}
521
515
522
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
523
517
static int init_gnutls_global(const char *pubkeyfilename,
524
518
const char *seckeyfilename,
525
const char *dhparamsfilename,
526
519
mandos_context *mc){
527
520
int ret;
528
521
unsigned int uret;
531
524
fprintf_plus(stderr, "Initializing GnuTLS\n");
532
525
}
533
526
527
ret = gnutls_global_init();
528
if(ret != GNUTLS_E_SUCCESS){
529
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
530
safer_gnutls_strerror(ret));
531
return -1;
532
}
533
534
534
if(debug){
535
535
/* "Use a log level over 10 to enable all debugging options."
536
536
* - GnuTLS manual
544
544
if(ret != GNUTLS_E_SUCCESS){
545
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
546
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
547
548
return -1;
548
549
}
549
550
574
575
safer_gnutls_strerror(ret));
575
576
goto globalfail;
576
577
}
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;
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
588
585
while(true){
589
params_capacity = incbuffer((char **)¶ms.data,
590
(size_t)params.size,
591
(size_t)params_capacity);
592
if(params_capacity == 0){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
593
590
perror_plus("incbuffer");
594
free(params.data);
595
params.data = NULL;
596
dhparamsfilename = NULL;
591
free(buffer.data);
592
buffer.data = NULL;
597
593
break;
598
594
}
599
ssize_t bytes_read = read(dhpfile,
600
params.data + params.size,
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
601
596
BUFFER_SIZE);
602
597
/* EOF */
603
598
if(bytes_read == 0){
606
601
/* check bytes_read for failure */
607
602
if(bytes_read < 0){
608
603
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
if(params.data == NULL){
617
dhparamsfilename = NULL;
618
}
619
if(dhparamsfilename == NULL){
620
break;
621
}
622
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
623
GNUTLS_X509_FMT_PEM);
624
if(ret != GNUTLS_E_SUCCESS){
625
fprintf_plus(stderr, "Failed to parse DH parameters in file"
626
" \"%s\": %s\n", dhparamsfilename,
627
safer_gnutls_strerror(ret));
628
dhparamsfilename = NULL;
629
}
630
free(params.data);
631
} while(false);
632
}
633
if(dhparamsfilename == NULL){
634
if(mc->dh_bits == 0){
635
/* Find out the optimal number of DH bits */
636
/* Try to read the private key file */
637
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
638
do {
639
int secfile = open(seckeyfilename, O_RDONLY);
640
if(secfile == -1){
641
perror_plus("open");
642
break;
643
}
644
size_t buffer_capacity = 0;
645
while(true){
646
buffer_capacity = incbuffer((char **)&buffer.data,
647
(size_t)buffer.size,
648
(size_t)buffer_capacity);
649
if(buffer_capacity == 0){
650
perror_plus("incbuffer");
651
free(buffer.data);
652
buffer.data = NULL;
653
break;
654
}
655
ssize_t bytes_read = read(secfile,
656
buffer.data + buffer.size,
657
BUFFER_SIZE);
658
/* EOF */
659
if(bytes_read == 0){
660
break;
661
}
662
/* check bytes_read for failure */
663
if(bytes_read < 0){
664
perror_plus("read");
665
free(buffer.data);
666
buffer.data = NULL;
667
break;
668
}
669
buffer.size += (unsigned int)bytes_read;
670
}
671
close(secfile);
672
} while(false);
673
/* If successful, use buffer to parse private key */
674
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
675
if(buffer.data != NULL){
676
{
677
gnutls_openpgp_privkey_t privkey = NULL;
678
ret = gnutls_openpgp_privkey_init(&privkey);
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
679
627
if(ret != GNUTLS_E_SUCCESS){
680
fprintf_plus(stderr, "Error initializing OpenPGP key"
681
" structure: %s",
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
682
629
safer_gnutls_strerror(ret));
683
free(buffer.data);
684
buffer.data = NULL;
685
} else {
686
ret = gnutls_openpgp_privkey_import
687
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
688
if(ret != GNUTLS_E_SUCCESS){
689
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
690
safer_gnutls_strerror(ret));
691
privkey = NULL;
692
}
693
free(buffer.data);
694
buffer.data = NULL;
695
if(privkey != NULL){
696
/* Use private key to suggest an appropriate
697
sec_param */
698
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
699
gnutls_openpgp_privkey_deinit(privkey);
700
if(debug){
701
fprintf_plus(stderr, "This OpenPGP key implies using"
702
" a GnuTLS security parameter \"%s\".\n",
703
safe_string(gnutls_sec_param_get_name
704
(sec_param)));
705
}
706
}
630
privkey = NULL;
707
631
}
708
}
709
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
710
/* Err on the side of caution */
711
sec_param = GNUTLS_SEC_PARAM_ULTRA;
712
if(debug){
713
fprintf_plus(stderr, "Falling back to security parameter"
714
" \"%s\"\n",
715
safe_string(gnutls_sec_param_get_name
716
(sec_param)));
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
717
644
}
718
645
}
719
646
}
720
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
721
if(uret != 0){
722
mc->dh_bits = uret;
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
723
650
if(debug){
724
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
725
" implies %u DH bits; using that.\n",
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
726
653
safe_string(gnutls_sec_param_get_name
727
(sec_param)),
728
mc->dh_bits);
654
(sec_param)));
729
655
}
730
} else {
731
fprintf_plus(stderr, "Failed to get implied number of DH"
732
" bits for security parameter \"%s\"): %s\n",
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
733
664
safe_string(gnutls_sec_param_get_name
734
665
(sec_param)),
735
safer_gnutls_strerror(ret));
736
goto globalfail;
666
mc->dh_bits);
737
667
}
738
} else if(debug){
739
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
740
mc->dh_bits);
741
}
742
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
743
if(ret != GNUTLS_E_SUCCESS){
744
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
745
" bits): %s\n", mc->dh_bits,
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
746
672
safer_gnutls_strerror(ret));
747
673
goto globalfail;
748
674
}
749
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
683
goto globalfail;
684
}
685
750
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
751
687
752
688
return 0;
754
690
globalfail:
755
691
756
692
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
757
694
gnutls_dh_params_deinit(mc->dh_params);
758
695
return -1;
759
696
}
811
748
/* ignore client certificate if any. */
812
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
813
750
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
814
753
return 0;
815
754
}
816
755
820
759
821
760
/* Set effective uid to 0, return errno */
822
761
__attribute__((warn_unused_result))
823
int raise_privileges(void){
824
int old_errno = errno;
825
int ret = 0;
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
826
765
if(seteuid(0) == -1){
827
ret = errno;
766
ret_errno = errno;
828
767
}
829
768
errno = old_errno;
830
return ret;
769
return ret_errno;
831
770
}
832
771
833
772
/* Set effective and real user ID to 0. Return errno. */
834
773
__attribute__((warn_unused_result))
835
int raise_privileges_permanently(void){
836
int old_errno = errno;
837
int ret = raise_privileges();
838
if(ret != 0){
774
error_t raise_privileges_permanently(void){
775
error_t old_errno = errno;
776
error_t ret_errno = raise_privileges();
777
if(ret_errno != 0){
839
778
errno = old_errno;
840
return ret;
779
return ret_errno;
841
780
}
842
781
if(setuid(0) == -1){
843
ret = errno;
782
ret_errno = errno;
844
783
}
845
784
errno = old_errno;
846
return ret;
785
return ret_errno;
847
786
}
848
787
849
788
/* Set effective user ID to unprivileged saved user ID */
850
789
__attribute__((warn_unused_result))
851
int lower_privileges(void){
852
int old_errno = errno;
853
int ret = 0;
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
854
793
if(seteuid(uid) == -1){
855
ret = errno;
794
ret_errno = errno;
856
795
}
857
796
errno = old_errno;
858
return ret;
797
return ret_errno;
859
798
}
860
799
861
800
/* Lower privileges permanently */
862
801
__attribute__((warn_unused_result))
863
int lower_privileges_permanently(void){
864
int old_errno = errno;
865
int ret = 0;
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
866
805
if(setuid(uid) == -1){
867
ret = errno;
806
ret_errno = errno;
868
807
}
869
808
errno = old_errno;
870
return ret;
809
return ret_errno;
871
810
}
872
811
873
812
/* Helper function to add_local_route() and delete_local_route() */
929
868
perror_plus("dup2(devnull, STDIN_FILENO)");
930
869
_exit(EX_OSERR);
931
870
}
932
ret = close(devnull);
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
933
872
if(ret == -1){
934
873
perror_plus("close");
935
874
_exit(EX_OSERR);
952
891
helper, O_RDONLY));
953
892
if(helper_fd == -1){
954
893
perror_plus("openat");
955
close(helperdir_fd);
956
894
_exit(EX_UNAVAILABLE);
957
895
}
958
close(helperdir_fd);
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
959
897
#ifdef __GNUC__
960
898
#pragma GCC diagnostic push
961
899
#pragma GCC diagnostic ignored "-Wcast-qual"
1080
1018
bool match = false;
1081
1019
{
1082
1020
char *interface = NULL;
1083
while((interface = argz_next(mc->interfaces,
1084
mc->interfaces_size,
1085
interface))){
1021
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1022
interface))){
1086
1023
if(if_nametoindex(interface) == (unsigned int)if_index){
1087
1024
match = true;
1088
1025
break;
1130
1067
goto mandos_end;
1131
1068
}
1132
1069
1070
memset(&to, 0, sizeof(to));
1133
1071
if(af == AF_INET6){
1134
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1135
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1136
ret = inet_pton(af, ip, &to6->sin6_addr);
1072
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1073
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1137
1074
} else { /* IPv4 */
1138
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1139
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1140
ret = inet_pton(af, ip, &to4->sin_addr);
1075
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1076
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1141
1077
}
1142
1078
if(ret < 0 ){
1143
1079
int e = errno;
1222
1158
sizeof(struct sockaddr_in));
1223
1159
}
1224
1160
if(ret < 0){
1225
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1161
if(errno == ENETUNREACH
1226
1162
and if_index != AVAHI_IF_UNSPEC
1227
1163
and connect_to == NULL
1228
1164
and not route_added and
1241
1177
with an explicit route added with the server's address.
1242
1178
1243
1179
Avahi bug reference:
1244
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1180
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1245
1181
https://bugs.debian.org/587961
1246
1182
*/
1247
1183
if(debug){
1427
1363
&decrypted_buffer, mc);
1428
1364
if(decrypted_buffer_size >= 0){
1429
1365
1430
clearerr(stdout);
1431
1366
written = 0;
1432
1367
while(written < (size_t) decrypted_buffer_size){
1433
1368
if(quit_now){
1449
1384
}
1450
1385
written += (size_t)ret;
1451
1386
}
1452
ret = fflush(stdout);
1453
if(ret != 0){
1454
int e = errno;
1455
if(debug){
1456
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1457
strerror(errno));
1458
}
1459
errno = e;
1460
goto mandos_end;
1461
}
1462
1387
retval = 0;
1463
1388
}
1464
1389
}
1477
1402
free(decrypted_buffer);
1478
1403
free(buffer);
1479
1404
if(tcp_sd >= 0){
1480
ret = close(tcp_sd);
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1481
1406
}
1482
1407
if(ret == -1){
1483
1408
if(e == 0){
1495
1420
return retval;
1496
1421
}
1497
1422
1423
__attribute__((nonnull))
1498
1424
static void resolve_callback(AvahiSServiceResolver *r,
1499
1425
AvahiIfIndex interface,
1500
1426
AvahiProtocol proto,
1637
1563
__attribute__((nonnull, warn_unused_result))
1638
1564
bool get_flags(const char *ifname, struct ifreq *ifr){
1639
1565
int ret;
1640
int old_errno;
1566
error_t ret_errno;
1641
1567
1642
1568
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
1569
if(s < 0){
1644
old_errno = errno;
1570
ret_errno = errno;
1645
1571
perror_plus("socket");
1646
errno = old_errno;
1572
errno = ret_errno;
1647
1573
return false;
1648
1574
}
1649
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1650
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1575
strcpy(ifr->ifr_name, ifname);
1651
1576
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1652
1577
if(ret == -1){
1653
1578
if(debug){
1654
old_errno = errno;
1579
ret_errno = errno;
1655
1580
perror_plus("ioctl SIOCGIFFLAGS");
1656
errno = old_errno;
1581
errno = ret_errno;
1657
1582
}
1658
1583
return false;
1659
1584
}
1923
1848
return;
1924
1849
}
1925
1850
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1926
1853
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1927
1854
runnable_hook, alphasort);
1855
#else /* not __GLIBC_PREREQ(2, 15) */
1856
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1857
alphasort);
1858
#endif /* not __GLIBC_PREREQ(2, 15) */
1859
#else /* not __GLIBC__ */
1860
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1861
alphasort);
1862
#endif /* not __GLIBC__ */
1928
1863
if(numhooks == -1){
1929
1864
perror_plus("scandir");
1930
1865
return;
2012
1947
perror_plus("openat");
2013
1948
_exit(EXIT_FAILURE);
2014
1949
}
2015
if(close(hookdir_fd) == -1){
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2016
1951
perror_plus("close");
2017
1952
_exit(EXIT_FAILURE);
2018
1953
}
2021
1956
perror_plus("dup2(devnull, STDIN_FILENO)");
2022
1957
_exit(EX_OSERR);
2023
1958
}
2024
ret = close(devnull);
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2025
1960
if(ret == -1){
2026
1961
perror_plus("close");
2027
1962
_exit(EX_OSERR);
2076
2011
free(direntry);
2077
2012
}
2078
2013
free(direntries);
2079
if(close(hookdir_fd) == -1){
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2080
2015
perror_plus("close");
2081
2016
} else {
2082
2017
hookdir_fd = -1;
2085
2020
}
2086
2021
2087
2022
__attribute__((nonnull, warn_unused_result))
2088
int bring_up_interface(const char *const interface,
2089
const float delay){
2090
int old_errno = errno;
2023
error_t bring_up_interface(const char *const interface,
2024
const float delay){
2025
error_t old_errno = errno;
2091
2026
int ret;
2092
2027
struct ifreq network;
2093
2028
unsigned int if_index = if_nametoindex(interface);
2103
2038
}
2104
2039
2105
2040
if(not interface_is_up(interface)){
2106
int ret_errno = 0;
2107
int ioctl_errno = 0;
2041
error_t ret_errno = 0, ioctl_errno = 0;
2108
2042
if(not get_flags(interface, &network)){
2109
2043
ret_errno = errno;
2110
2044
fprintf_plus(stderr, "Failed to get flags for interface "
2123
2057
}
2124
2058
2125
2059
if(quit_now){
2126
ret = close(sd);
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2127
2061
if(ret == -1){
2128
2062
perror_plus("close");
2129
2063
}
2179
2113
}
2180
2114
2181
2115
/* Close the socket */
2182
ret = close(sd);
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2183
2117
if(ret == -1){
2184
2118
perror_plus("close");
2185
2119
}
2197
2131
2198
2132
/* Sleep checking until interface is running.
2199
2133
Check every 0.25s, up to total time of delay */
2200
for(int i = 0; i < delay * 4; i++){
2134
for(int i=0; i < delay * 4; i++){
2201
2135
if(interface_is_running(interface)){
2202
2136
break;
2203
2137
}
2213
2147
}
2214
2148
2215
2149
__attribute__((nonnull, warn_unused_result))
2216
int take_down_interface(const char *const interface){
2217
int old_errno = errno;
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2218
2152
struct ifreq network;
2219
2153
unsigned int if_index = if_nametoindex(interface);
2220
2154
if(if_index == 0){
2223
2157
return ENXIO;
2224
2158
}
2225
2159
if(interface_is_up(interface)){
2226
int ret_errno = 0;
2227
int ioctl_errno = 0;
2160
error_t ret_errno = 0, ioctl_errno = 0;
2228
2161
if(not get_flags(interface, &network) and debug){
2229
2162
ret_errno = errno;
2230
2163
fprintf_plus(stderr, "Failed to get flags for interface "
2268
2201
}
2269
2202
2270
2203
/* Close the socket */
2271
int ret = close(sd);
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2272
2205
if(ret == -1){
2273
2206
perror_plus("close");
2274
2207
}
2290
2223
2291
2224
int main(int argc, char *argv[]){
2292
2225
mandos_context mc = { .server = NULL, .dh_bits = 0,
2293
.priority = "SECURE256:!CTYPE-X.509"
2294
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2295
.current_server = NULL, .interfaces = NULL,
2296
.interfaces_size = 0 };
2226
.priority = "SECURE256:!CTYPE-X.509:"
2227
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2228
.interfaces = NULL, .interfaces_size = 0 };
2297
2229
AvahiSServiceBrowser *sb = NULL;
2298
2230
error_t ret_errno;
2299
2231
int ret;
2308
2240
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2309
2241
const char *seckey = PATHDIR "/" SECKEY;
2310
2242
const char *pubkey = PATHDIR "/" PUBKEY;
2311
const char *dh_params_file = NULL;
2312
2243
char *interfaces_hooks = NULL;
2313
2244
2314
2245
bool gnutls_initialized = false;
2367
2298
.doc = "Bit length of the prime number used in the"
2368
2299
" Diffie-Hellman key exchange",
2369
2300
.group = 2 },
2370
{ .name = "dh-params", .key = 134,
2371
.arg = "FILE",
2372
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2373
" for the Diffie-Hellman key exchange",
2374
.group = 2 },
2375
2301
{ .name = "priority", .key = 130,
2376
2302
.arg = "STRING",
2377
2303
.doc = "GnuTLS priority string for the TLS handshake",
2432
2358
}
2433
2359
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2434
2360
break;
2435
case 134: /* --dh-params */
2436
dh_params_file = arg;
2437
break;
2438
2361
case 130: /* --priority */
2439
2362
mc.priority = arg;
2440
2363
break;
2480
2403
.args_doc = "",
2481
2404
.doc = "Mandos client -- Get and decrypt"
2482
2405
" passwords from a Mandos server" };
2483
ret_errno = argp_parse(&argp, argc, argv,
2484
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2485
switch(ret_errno){
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2486
2409
case 0:
2487
2410
break;
2488
2411
case ENOMEM:
2489
2412
default:
2490
errno = ret_errno;
2413
errno = ret;
2491
2414
perror_plus("argp_parse");
2492
2415
exitcode = EX_OSERR;
2493
2416
goto end;
2499
2422
2500
2423
{
2501
2424
/* Work around Debian bug #633582:
2502
<https://bugs.debian.org/633582> */
2425
<http://bugs.debian.org/633582> */
2503
2426
2504
2427
/* Re-raise privileges */
2505
ret = raise_privileges();
2506
if(ret != 0){
2507
errno = ret;
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2508
2431
perror_plus("Failed to raise privileges");
2509
2432
} else {
2510
2433
struct stat st;
2526
2449
}
2527
2450
}
2528
2451
}
2529
close(seckey_fd);
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2530
2453
}
2531
2454
}
2532
2455
2547
2470
}
2548
2471
}
2549
2472
}
2550
close(pubkey_fd);
2551
}
2552
}
2553
2554
if(dh_params_file != NULL
2555
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2556
int dhparams_fd = open(dh_params_file, O_RDONLY);
2557
if(dhparams_fd == -1){
2558
perror_plus("open");
2559
} else {
2560
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2561
if(ret == -1){
2562
perror_plus("fstat");
2563
} else {
2564
if(S_ISREG(st.st_mode)
2565
and st.st_uid == 0 and st.st_gid == 0){
2566
ret = fchown(dhparams_fd, uid, gid);
2567
if(ret == -1){
2568
perror_plus("fchown");
2569
}
2570
}
2571
}
2572
close(dhparams_fd);
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
2573
2474
}
2574
2475
}
2575
2476
2576
2477
/* Lower privileges */
2577
ret = lower_privileges();
2578
if(ret != 0){
2579
errno = ret;
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2580
2481
perror_plus("Failed to lower privileges");
2581
2482
}
2582
2483
}
2752
2653
errno = bring_up_interface(interface, delay);
2753
2654
if(not interface_was_up){
2754
2655
if(errno != 0){
2755
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2756
" %s\n", interface, strerror(errno));
2656
perror_plus("Failed to bring up interface");
2757
2657
} else {
2758
2658
errno = argz_add(&interfaces_to_take_down,
2759
2659
&interfaces_to_take_down_size,
2782
2682
goto end;
2783
2683
}
2784
2684
2785
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2786
2686
if(ret == -1){
2787
2687
fprintf_plus(stderr, "init_gnutls_global failed\n");
2788
2688
exitcode = EX_UNAVAILABLE;
2910
2810
2911
2811
/* Allocate a new server */
2912
2812
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2913
&config, NULL, NULL, &ret);
2813
&config, NULL, NULL, &ret_errno);
2914
2814
2915
2815
/* Free the Avahi configuration data */
2916
2816
avahi_server_config_free(&config);
2919
2819
/* Check if creating the Avahi server object succeeded */
2920
2820
if(mc.server == NULL){
2921
2821
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2922
avahi_strerror(ret));
2822
avahi_strerror(ret_errno));
2923
2823
exitcode = EX_UNAVAILABLE;
2924
2824
goto end;
2925
2825
}
2960
2860
end:
2961
2861
2962
2862
if(debug){
2963
if(signal_received){
2964
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2965
argv[0], signal_received,
2966
strsignal(signal_received));
2967
} else {
2968
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2969
}
2863
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2970
2864
}
2971
2865
2972
2866
/* Cleanup things */
2983
2877
2984
2878
if(gnutls_initialized){
2985
2879
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2986
2881
gnutls_dh_params_deinit(mc.dh_params);
2987
2882
}
2988
2883
3011
2906
3012
2907
/* Re-raise privileges */
3013
2908
{
3014
ret = raise_privileges();
3015
if(ret != 0){
3016
errno = ret;
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
3017
2912
perror_plus("Failed to raise privileges");
3018
2913
} else {
3019
2914
3024
2919
/* Take down the network interfaces which were brought up */
3025
2920
{
3026
2921
char *interface = NULL;
3027
while((interface = argz_next(interfaces_to_take_down,
3028
interfaces_to_take_down_size,
3029
interface))){
3030
ret = take_down_interface(interface);
3031
if(ret != 0){
3032
errno = ret;
2922
while((interface=argz_next(interfaces_to_take_down,
2923
interfaces_to_take_down_size,
2924
interface))){
2925
ret_errno = take_down_interface(interface);
2926
if(ret_errno != 0){
2927
errno = ret_errno;
3033
2928
perror_plus("Failed to take down interface");
3034
2929
}
3035
2930
}
3040
2935
}
3041
2936
}
3042
2937
3043
ret = lower_privileges_permanently();
3044
if(ret != 0){
3045
errno = ret;
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3046
2941
perror_plus("Failed to lower privileges permanently");
3047
2942
}
3048
2943
}
3050
2945
free(interfaces_to_take_down);
3051
2946
free(interfaces_hooks);
3052
2947
3053
void clean_dir_at(int base, const char * const dirname,
3054
uintmax_t level){
3055
struct dirent **direntries = NULL;
3056
int dret;
3057
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3058
O_RDONLY
3059
| O_NOFOLLOW
3060
| O_DIRECTORY
3061
| O_PATH));
3062
if(dir_fd == -1){
3063
perror_plus("open");
3064
}
3065
int numentries = scandirat(dir_fd, ".", &direntries,
3066
notdotentries, alphasort);
3067
if(numentries >= 0){
3068
for(int i = 0; i < numentries; i++){
3069
if(debug){
3070
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3071
dirname, direntries[i]->d_name);
3072
}
3073
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3074
if(dret == -1){
3075
if(errno == EISDIR){
3076
dret = unlinkat(dir_fd, direntries[i]->d_name,
3077
AT_REMOVEDIR);
3078
}
3079
if((dret == -1) and (errno == ENOTEMPTY)
3080
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3081
== 0) and (level == 0)){
3082
/* Recurse only in this special case */
3083
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3084
dret = 0;
3085
}
3086
if(dret == -1){
3087
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3088
direntries[i]->d_name, strerror(errno));
3089
}
3090
}
3091
free(direntries[i]);
3092
}
3093
3094
/* need to clean even if 0 because man page doesn't specify */
3095
free(direntries);
3096
if(numentries == -1){
3097
perror_plus("scandirat");
3098
}
3099
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3100
if(dret == -1 and errno != ENOENT){
3101
perror_plus("rmdir");
3102
}
3103
} else {
3104
perror_plus("scandirat");
3105
}
3106
close(dir_fd);
3107
}
3108
3109
2948
/* Removes the GPGME temp directory and all files inside */
3110
2949
if(tempdir != NULL){
3111
clean_dir_at(-1, tempdir, 0);
2950
struct dirent **direntries = NULL;
2951
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2952
| O_NOFOLLOW
2953
| O_DIRECTORY
2954
| O_PATH));
2955
if(tempdir_fd == -1){
2956
perror_plus("open");
2957
} else {
2958
#ifdef __GLIBC__
2959
#if __GLIBC_PREREQ(2, 15)
2960
int numentries = scandirat(tempdir_fd, ".", &direntries,
2961
notdotentries, alphasort);
2962
#else /* not __GLIBC_PREREQ(2, 15) */
2963
int numentries = scandir(tempdir, &direntries, notdotentries,
2964
alphasort);
2965
#endif /* not __GLIBC_PREREQ(2, 15) */
2966
#else /* not __GLIBC__ */
2967
int numentries = scandir(tempdir, &direntries, notdotentries,
2968
alphasort);
2969
#endif /* not __GLIBC__ */
2970
if(numentries >= 0){
2971
for(int i = 0; i < numentries; i++){
2972
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2973
if(ret == -1){
2974
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2975
" \"%s\", 0): %s\n", tempdir,
2976
direntries[i]->d_name, strerror(errno));
2977
}
2978
free(direntries[i]);
2979
}
2980
2981
/* need to clean even if 0 because man page doesn't specify */
2982
free(direntries);
2983
if(numentries == -1){
2984
perror_plus("scandir");
2985
}
2986
ret = rmdir(tempdir);
2987
if(ret == -1 and errno != ENOENT){
2988
perror_plus("rmdir");
2989
}
2990
}
2991
TEMP_FAILURE_RETRY(close(tempdir_fd));
2992
}
3112
2993
}
3113
2994
3114
2995
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0