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- 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 © 2008-2018 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
}
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
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);
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);
680
627
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error initializing OpenPGP key"
682
" structure: %s",
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
683
629
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
}
630
privkey = NULL;
708
631
}
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)));
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
}
718
644
}
719
645
}
720
646
}
721
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
722
if(uret != 0){
723
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;
724
650
if(debug){
725
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
726
" implies %u DH bits; using that.\n",
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
727
653
safe_string(gnutls_sec_param_get_name
728
(sec_param)),
729
mc->dh_bits);
654
(sec_param)));
730
655
}
731
} else {
732
fprintf_plus(stderr, "Failed to get implied number of DH"
733
" 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",
734
664
safe_string(gnutls_sec_param_get_name
735
665
(sec_param)),
736
safer_gnutls_strerror(ret));
737
goto globalfail;
666
mc->dh_bits);
738
667
}
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,
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)),
747
672
safer_gnutls_strerror(ret));
748
673
goto globalfail;
749
674
}
750
}
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
751
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
752
687
753
688
return 0;
755
690
globalfail:
756
691
757
692
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
758
694
gnutls_dh_params_deinit(mc->dh_params);
759
695
return -1;
760
696
}
812
748
/* ignore client certificate if any. */
813
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
814
750
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
815
753
return 0;
816
754
}
817
755
821
759
822
760
/* Set effective uid to 0, return errno */
823
761
__attribute__((warn_unused_result))
824
int raise_privileges(void){
825
int old_errno = errno;
826
int ret = 0;
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
827
765
if(seteuid(0) == -1){
828
ret = errno;
766
ret_errno = errno;
829
767
}
830
768
errno = old_errno;
831
return ret;
769
return ret_errno;
832
770
}
833
771
834
772
/* Set effective and real user ID to 0. Return errno. */
835
773
__attribute__((warn_unused_result))
836
int raise_privileges_permanently(void){
837
int old_errno = errno;
838
int ret = raise_privileges();
839
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){
840
778
errno = old_errno;
841
return ret;
779
return ret_errno;
842
780
}
843
781
if(setuid(0) == -1){
844
ret = errno;
782
ret_errno = errno;
845
783
}
846
784
errno = old_errno;
847
return ret;
785
return ret_errno;
848
786
}
849
787
850
788
/* Set effective user ID to unprivileged saved user ID */
851
789
__attribute__((warn_unused_result))
852
int lower_privileges(void){
853
int old_errno = errno;
854
int ret = 0;
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
855
793
if(seteuid(uid) == -1){
856
ret = errno;
794
ret_errno = errno;
857
795
}
858
796
errno = old_errno;
859
return ret;
797
return ret_errno;
860
798
}
861
799
862
800
/* Lower privileges permanently */
863
801
__attribute__((warn_unused_result))
864
int lower_privileges_permanently(void){
865
int old_errno = errno;
866
int ret = 0;
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
867
805
if(setuid(uid) == -1){
868
ret = errno;
806
ret_errno = errno;
869
807
}
870
808
errno = old_errno;
871
return ret;
809
return ret_errno;
872
810
}
873
811
874
812
/* Helper function to add_local_route() and delete_local_route() */
930
868
perror_plus("dup2(devnull, STDIN_FILENO)");
931
869
_exit(EX_OSERR);
932
870
}
933
ret = close(devnull);
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
934
872
if(ret == -1){
935
873
perror_plus("close");
936
874
_exit(EX_OSERR);
953
891
helper, O_RDONLY));
954
892
if(helper_fd == -1){
955
893
perror_plus("openat");
956
close(helperdir_fd);
957
894
_exit(EX_UNAVAILABLE);
958
895
}
959
close(helperdir_fd);
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
960
897
#ifdef __GNUC__
961
898
#pragma GCC diagnostic push
962
899
#pragma GCC diagnostic ignored "-Wcast-qual"
1081
1018
bool match = false;
1082
1019
{
1083
1020
char *interface = NULL;
1084
while((interface = argz_next(mc->interfaces,
1085
mc->interfaces_size,
1086
interface))){
1021
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1022
interface))){
1087
1023
if(if_nametoindex(interface) == (unsigned int)if_index){
1088
1024
match = true;
1089
1025
break;
1131
1067
goto mandos_end;
1132
1068
}
1133
1069
1070
memset(&to, 0, sizeof(to));
1134
1071
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);
1072
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1073
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
1138
1074
} 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);
1075
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1076
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
1142
1077
}
1143
1078
if(ret < 0 ){
1144
1079
int e = errno;
1223
1158
sizeof(struct sockaddr_in));
1224
1159
}
1225
1160
if(ret < 0){
1226
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1161
if(errno == ENETUNREACH
1227
1162
and if_index != AVAHI_IF_UNSPEC
1228
1163
and connect_to == NULL
1229
1164
and not route_added and
1242
1177
with an explicit route added with the server's address.
1243
1178
1244
1179
Avahi bug reference:
1245
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1180
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1246
1181
https://bugs.debian.org/587961
1247
1182
*/
1248
1183
if(debug){
1428
1363
&decrypted_buffer, mc);
1429
1364
if(decrypted_buffer_size >= 0){
1430
1365
1431
clearerr(stdout);
1432
1366
written = 0;
1433
1367
while(written < (size_t) decrypted_buffer_size){
1434
1368
if(quit_now){
1450
1384
}
1451
1385
written += (size_t)ret;
1452
1386
}
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
1387
retval = 0;
1464
1388
}
1465
1389
}
1478
1402
free(decrypted_buffer);
1479
1403
free(buffer);
1480
1404
if(tcp_sd >= 0){
1481
ret = close(tcp_sd);
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1482
1406
}
1483
1407
if(ret == -1){
1484
1408
if(e == 0){
1496
1420
return retval;
1497
1421
}
1498
1422
1423
__attribute__((nonnull))
1499
1424
static void resolve_callback(AvahiSServiceResolver *r,
1500
1425
AvahiIfIndex interface,
1501
1426
AvahiProtocol proto,
1638
1563
__attribute__((nonnull, warn_unused_result))
1639
1564
bool get_flags(const char *ifname, struct ifreq *ifr){
1640
1565
int ret;
1641
int old_errno;
1566
error_t ret_errno;
1642
1567
1643
1568
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1644
1569
if(s < 0){
1645
old_errno = errno;
1570
ret_errno = errno;
1646
1571
perror_plus("socket");
1647
errno = old_errno;
1572
errno = ret_errno;
1648
1573
return false;
1649
1574
}
1650
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1651
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1575
strcpy(ifr->ifr_name, ifname);
1652
1576
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1653
1577
if(ret == -1){
1654
1578
if(debug){
1655
old_errno = errno;
1579
ret_errno = errno;
1656
1580
perror_plus("ioctl SIOCGIFFLAGS");
1657
errno = old_errno;
1581
errno = ret_errno;
1658
1582
}
1659
close(s);
1660
1583
return false;
1661
1584
}
1662
close(s);
1663
1585
return true;
1664
1586
}
1665
1587
1926
1848
return;
1927
1849
}
1928
1850
}
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
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1934
1853
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1935
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__ */
1936
1863
if(numhooks == -1){
1937
1864
perror_plus("scandir");
1938
close(devnull);
1939
1865
return;
1940
1866
}
1941
1867
struct dirent *direntry;
1942
1868
int ret;
1869
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1870
if(devnull == -1){
1871
perror_plus("open(\"/dev/null\", O_RDONLY)");
1872
return;
1873
}
1943
1874
for(int i = 0; i < numhooks; i++){
1944
1875
direntry = direntries[i];
1945
1876
if(debug){
2016
1947
perror_plus("openat");
2017
1948
_exit(EXIT_FAILURE);
2018
1949
}
2019
if(close(hookdir_fd) == -1){
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2020
1951
perror_plus("close");
2021
1952
_exit(EXIT_FAILURE);
2022
1953
}
2025
1956
perror_plus("dup2(devnull, STDIN_FILENO)");
2026
1957
_exit(EX_OSERR);
2027
1958
}
2028
ret = close(devnull);
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2029
1960
if(ret == -1){
2030
1961
perror_plus("close");
2031
1962
_exit(EX_OSERR);
2080
2011
free(direntry);
2081
2012
}
2082
2013
free(direntries);
2083
if(close(hookdir_fd) == -1){
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2084
2015
perror_plus("close");
2085
2016
} else {
2086
2017
hookdir_fd = -1;
2089
2020
}
2090
2021
2091
2022
__attribute__((nonnull, warn_unused_result))
2092
int bring_up_interface(const char *const interface,
2093
const float delay){
2094
int old_errno = errno;
2023
error_t bring_up_interface(const char *const interface,
2024
const float delay){
2025
error_t old_errno = errno;
2095
2026
int ret;
2096
2027
struct ifreq network;
2097
2028
unsigned int if_index = if_nametoindex(interface);
2107
2038
}
2108
2039
2109
2040
if(not interface_is_up(interface)){
2110
int ret_errno = 0;
2111
int ioctl_errno = 0;
2041
error_t ret_errno = 0, ioctl_errno = 0;
2112
2042
if(not get_flags(interface, &network)){
2113
2043
ret_errno = errno;
2114
2044
fprintf_plus(stderr, "Failed to get flags for interface "
2127
2057
}
2128
2058
2129
2059
if(quit_now){
2130
ret = close(sd);
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2131
2061
if(ret == -1){
2132
2062
perror_plus("close");
2133
2063
}
2183
2113
}
2184
2114
2185
2115
/* Close the socket */
2186
ret = close(sd);
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2187
2117
if(ret == -1){
2188
2118
perror_plus("close");
2189
2119
}
2201
2131
2202
2132
/* Sleep checking until interface is running.
2203
2133
Check every 0.25s, up to total time of delay */
2204
for(int i = 0; i < delay * 4; i++){
2134
for(int i=0; i < delay * 4; i++){
2205
2135
if(interface_is_running(interface)){
2206
2136
break;
2207
2137
}
2217
2147
}
2218
2148
2219
2149
__attribute__((nonnull, warn_unused_result))
2220
int take_down_interface(const char *const interface){
2221
int old_errno = errno;
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2222
2152
struct ifreq network;
2223
2153
unsigned int if_index = if_nametoindex(interface);
2224
2154
if(if_index == 0){
2227
2157
return ENXIO;
2228
2158
}
2229
2159
if(interface_is_up(interface)){
2230
int ret_errno = 0;
2231
int ioctl_errno = 0;
2160
error_t ret_errno = 0, ioctl_errno = 0;
2232
2161
if(not get_flags(interface, &network) and debug){
2233
2162
ret_errno = errno;
2234
2163
fprintf_plus(stderr, "Failed to get flags for interface "
2272
2201
}
2273
2202
2274
2203
/* Close the socket */
2275
int ret = close(sd);
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2276
2205
if(ret == -1){
2277
2206
perror_plus("close");
2278
2207
}
2294
2223
2295
2224
int main(int argc, char *argv[]){
2296
2225
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 };
2226
.priority = "SECURE256:!CTYPE-X.509:"
2227
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2228
.interfaces = NULL, .interfaces_size = 0 };
2301
2229
AvahiSServiceBrowser *sb = NULL;
2302
2230
error_t ret_errno;
2303
2231
int ret;
2312
2240
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2313
2241
const char *seckey = PATHDIR "/" SECKEY;
2314
2242
const char *pubkey = PATHDIR "/" PUBKEY;
2315
const char *dh_params_file = NULL;
2316
2243
char *interfaces_hooks = NULL;
2317
2244
2318
2245
bool gnutls_initialized = false;
2371
2298
.doc = "Bit length of the prime number used in the"
2372
2299
" Diffie-Hellman key exchange",
2373
2300
.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
2301
{ .name = "priority", .key = 130,
2380
2302
.arg = "STRING",
2381
2303
.doc = "GnuTLS priority string for the TLS handshake",
2436
2358
}
2437
2359
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2438
2360
break;
2439
case 134: /* --dh-params */
2440
dh_params_file = arg;
2441
break;
2442
2361
case 130: /* --priority */
2443
2362
mc.priority = arg;
2444
2363
break;
2484
2403
.args_doc = "",
2485
2404
.doc = "Mandos client -- Get and decrypt"
2486
2405
" 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){
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2490
2409
case 0:
2491
2410
break;
2492
2411
case ENOMEM:
2493
2412
default:
2494
errno = ret_errno;
2413
errno = ret;
2495
2414
perror_plus("argp_parse");
2496
2415
exitcode = EX_OSERR;
2497
2416
goto end;
2503
2422
2504
2423
{
2505
2424
/* Work around Debian bug #633582:
2506
<https://bugs.debian.org/633582> */
2425
<http://bugs.debian.org/633582> */
2507
2426
2508
2427
/* Re-raise privileges */
2509
ret = raise_privileges();
2510
if(ret != 0){
2511
errno = ret;
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2512
2431
perror_plus("Failed to raise privileges");
2513
2432
} else {
2514
2433
struct stat st;
2530
2449
}
2531
2450
}
2532
2451
}
2533
close(seckey_fd);
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2534
2453
}
2535
2454
}
2536
2455
2551
2470
}
2552
2471
}
2553
2472
}
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);
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
2577
2474
}
2578
2475
}
2579
2476
2580
2477
/* Lower privileges */
2581
ret = lower_privileges();
2582
if(ret != 0){
2583
errno = ret;
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2584
2481
perror_plus("Failed to lower privileges");
2585
2482
}
2586
2483
}
2756
2653
errno = bring_up_interface(interface, delay);
2757
2654
if(not interface_was_up){
2758
2655
if(errno != 0){
2759
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2760
" %s\n", interface, strerror(errno));
2656
perror_plus("Failed to bring up interface");
2761
2657
} else {
2762
2658
errno = argz_add(&interfaces_to_take_down,
2763
2659
&interfaces_to_take_down_size,
2786
2682
goto end;
2787
2683
}
2788
2684
2789
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2790
2686
if(ret == -1){
2791
2687
fprintf_plus(stderr, "init_gnutls_global failed\n");
2792
2688
exitcode = EX_UNAVAILABLE;
2914
2810
2915
2811
/* Allocate a new server */
2916
2812
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2917
&config, NULL, NULL, &ret);
2813
&config, NULL, NULL, &ret_errno);
2918
2814
2919
2815
/* Free the Avahi configuration data */
2920
2816
avahi_server_config_free(&config);
2923
2819
/* Check if creating the Avahi server object succeeded */
2924
2820
if(mc.server == NULL){
2925
2821
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2926
avahi_strerror(ret));
2822
avahi_strerror(ret_errno));
2927
2823
exitcode = EX_UNAVAILABLE;
2928
2824
goto end;
2929
2825
}
2964
2860
end:
2965
2861
2966
2862
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
}
2863
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2974
2864
}
2975
2865
2976
2866
/* Cleanup things */
2987
2877
2988
2878
if(gnutls_initialized){
2989
2879
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2990
2881
gnutls_dh_params_deinit(mc.dh_params);
2991
2882
}
2992
2883
3015
2906
3016
2907
/* Re-raise privileges */
3017
2908
{
3018
ret = raise_privileges();
3019
if(ret != 0){
3020
errno = ret;
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
3021
2912
perror_plus("Failed to raise privileges");
3022
2913
} else {
3023
2914
3028
2919
/* Take down the network interfaces which were brought up */
3029
2920
{
3030
2921
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;
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;
3037
2928
perror_plus("Failed to take down interface");
3038
2929
}
3039
2930
}
3044
2935
}
3045
2936
}
3046
2937
3047
ret = lower_privileges_permanently();
3048
if(ret != 0){
3049
errno = ret;
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3050
2941
perror_plus("Failed to lower privileges permanently");
3051
2942
}
3052
2943
}
3054
2945
free(interfaces_to_take_down);
3055
2946
free(interfaces_hooks);
3056
2947
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
2948
/* Removes the GPGME temp directory and all files inside */
3112
2949
if(tempdir != NULL){
3113
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
}
3114
2993
}
3115
2994
3116
2995
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0