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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 © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 Björn Påhlsson
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
52
51
#include <sys/ioctl.h> /* ioctl */
53
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
54
53
sockaddr_in6, PF_INET6,
58
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
59
58
inet_pton(), connect(),
60
59
getnameinfo() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
60
#include <fcntl.h> /* open(), unlinkat() */
62
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
63
62
*/
64
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
65
64
strtoimax() */
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
65
#include <errno.h> /* perror(), errno,
71
66
program_invocation_short_name */
72
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
310
305
return false;
311
306
}
312
307
313
ret = close(fd);
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
314
309
if(ret == -1){
315
310
perror_plus("close");
316
311
}
518
513
fprintf_plus(stderr, "GnuTLS: %s", string);
519
514
}
520
515
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
516
__attribute__((nonnull, warn_unused_result))
522
517
static int init_gnutls_global(const char *pubkeyfilename,
523
518
const char *seckeyfilename,
524
const char *dhparamsfilename,
525
519
mandos_context *mc){
526
520
int ret;
527
521
unsigned int uret;
530
524
fprintf_plus(stderr, "Initializing GnuTLS\n");
531
525
}
532
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
533
534
if(debug){
534
535
/* "Use a log level over 10 to enable all debugging options."
535
536
* - GnuTLS manual
543
544
if(ret != GNUTLS_E_SUCCESS){
544
545
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
545
546
safer_gnutls_strerror(ret));
547
gnutls_global_deinit();
546
548
return -1;
547
549
}
548
550
573
575
safer_gnutls_strerror(ret));
574
576
goto globalfail;
575
577
}
576
/* If a Diffie-Hellman parameters file was given, try to use it */
577
if(dhparamsfilename != NULL){
578
gnutls_datum_t params = { .data = NULL, .size = 0 };
579
do {
580
int dhpfile = open(dhparamsfilename, O_RDONLY);
581
if(dhpfile == -1){
582
perror_plus("open");
583
dhparamsfilename = NULL;
584
break;
585
}
586
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;
587
585
while(true){
588
params_capacity = incbuffer((char **)¶ms.data,
589
(size_t)params.size,
590
(size_t)params_capacity);
591
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){
592
590
perror_plus("incbuffer");
593
free(params.data);
594
params.data = NULL;
595
dhparamsfilename = NULL;
591
free(buffer.data);
592
buffer.data = NULL;
596
593
break;
597
594
}
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
600
596
BUFFER_SIZE);
601
597
/* EOF */
602
598
if(bytes_read == 0){
605
601
/* check bytes_read for failure */
606
602
if(bytes_read < 0){
607
603
perror_plus("read");
608
free(params.data);
609
params.data = NULL;
610
dhparamsfilename = NULL;
611
break;
612
}
613
params.size += (unsigned int)bytes_read;
614
}
615
if(params.data == NULL){
616
dhparamsfilename = NULL;
617
}
618
if(dhparamsfilename == NULL){
619
break;
620
}
621
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
622
GNUTLS_X509_FMT_PEM);
623
if(ret != GNUTLS_E_SUCCESS){
624
fprintf_plus(stderr, "Failed to parse DH parameters in file"
625
" \"%s\": %s\n", dhparamsfilename,
626
safer_gnutls_strerror(ret));
627
dhparamsfilename = NULL;
628
}
629
free(params.data);
630
} while(false);
631
}
632
if(dhparamsfilename == NULL){
633
if(mc->dh_bits == 0){
634
/* Find out the optimal number of DH bits */
635
/* Try to read the private key file */
636
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
637
do {
638
int secfile = open(seckeyfilename, O_RDONLY);
639
if(secfile == -1){
640
perror_plus("open");
641
break;
642
}
643
size_t buffer_capacity = 0;
644
while(true){
645
buffer_capacity = incbuffer((char **)&buffer.data,
646
(size_t)buffer.size,
647
(size_t)buffer_capacity);
648
if(buffer_capacity == 0){
649
perror_plus("incbuffer");
650
free(buffer.data);
651
buffer.data = NULL;
652
break;
653
}
654
ssize_t bytes_read = read(secfile,
655
buffer.data + buffer.size,
656
BUFFER_SIZE);
657
/* EOF */
658
if(bytes_read == 0){
659
break;
660
}
661
/* check bytes_read for failure */
662
if(bytes_read < 0){
663
perror_plus("read");
664
free(buffer.data);
665
buffer.data = NULL;
666
break;
667
}
668
buffer.size += (unsigned int)bytes_read;
669
}
670
close(secfile);
671
} while(false);
672
/* If successful, use buffer to parse private key */
673
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
674
if(buffer.data != NULL){
675
{
676
gnutls_openpgp_privkey_t privkey = NULL;
677
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);
678
627
if(ret != GNUTLS_E_SUCCESS){
679
fprintf_plus(stderr, "Error initializing OpenPGP key"
680
" structure: %s",
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
681
629
safer_gnutls_strerror(ret));
682
free(buffer.data);
683
buffer.data = NULL;
684
} else {
685
ret = gnutls_openpgp_privkey_import
686
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
687
if(ret != GNUTLS_E_SUCCESS){
688
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
689
safer_gnutls_strerror(ret));
690
privkey = NULL;
691
}
692
free(buffer.data);
693
buffer.data = NULL;
694
if(privkey != NULL){
695
/* Use private key to suggest an appropriate
696
sec_param */
697
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
698
gnutls_openpgp_privkey_deinit(privkey);
699
if(debug){
700
fprintf_plus(stderr, "This OpenPGP key implies using"
701
" a GnuTLS security parameter \"%s\".\n",
702
safe_string(gnutls_sec_param_get_name
703
(sec_param)));
704
}
705
}
630
privkey = NULL;
706
631
}
707
}
708
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
709
/* Err on the side of caution */
710
sec_param = GNUTLS_SEC_PARAM_ULTRA;
711
if(debug){
712
fprintf_plus(stderr, "Falling back to security parameter"
713
" \"%s\"\n",
714
safe_string(gnutls_sec_param_get_name
715
(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
}
716
644
}
717
645
}
718
646
}
719
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
720
if(uret != 0){
721
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;
722
650
if(debug){
723
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
724
" implies %u DH bits; using that.\n",
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
725
653
safe_string(gnutls_sec_param_get_name
726
(sec_param)),
727
mc->dh_bits);
654
(sec_param)));
728
655
}
729
} else {
730
fprintf_plus(stderr, "Failed to get implied number of DH"
731
" 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",
732
664
safe_string(gnutls_sec_param_get_name
733
665
(sec_param)),
734
safer_gnutls_strerror(ret));
735
goto globalfail;
666
mc->dh_bits);
736
667
}
737
} else if(debug){
738
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
739
mc->dh_bits);
740
}
741
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
742
if(ret != GNUTLS_E_SUCCESS){
743
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
744
" 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)),
745
672
safer_gnutls_strerror(ret));
746
673
goto globalfail;
747
674
}
748
}
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
749
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
750
687
751
688
return 0;
753
690
globalfail:
754
691
755
692
gnutls_certificate_free_credentials(mc->cred);
693
gnutls_global_deinit();
756
694
gnutls_dh_params_deinit(mc->dh_params);
757
695
return -1;
758
696
}
810
748
/* ignore client certificate if any. */
811
749
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
812
750
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
752
813
753
return 0;
814
754
}
815
755
819
759
820
760
/* Set effective uid to 0, return errno */
821
761
__attribute__((warn_unused_result))
822
int raise_privileges(void){
823
int old_errno = errno;
824
int ret = 0;
762
error_t raise_privileges(void){
763
error_t old_errno = errno;
764
error_t ret_errno = 0;
825
765
if(seteuid(0) == -1){
826
ret = errno;
766
ret_errno = errno;
827
767
}
828
768
errno = old_errno;
829
return ret;
769
return ret_errno;
830
770
}
831
771
832
772
/* Set effective and real user ID to 0. Return errno. */
833
773
__attribute__((warn_unused_result))
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
837
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){
838
778
errno = old_errno;
839
return ret;
779
return ret_errno;
840
780
}
841
781
if(setuid(0) == -1){
842
ret = errno;
782
ret_errno = errno;
843
783
}
844
784
errno = old_errno;
845
return ret;
785
return ret_errno;
846
786
}
847
787
848
788
/* Set effective user ID to unprivileged saved user ID */
849
789
__attribute__((warn_unused_result))
850
int lower_privileges(void){
851
int old_errno = errno;
852
int ret = 0;
790
error_t lower_privileges(void){
791
error_t old_errno = errno;
792
error_t ret_errno = 0;
853
793
if(seteuid(uid) == -1){
854
ret = errno;
794
ret_errno = errno;
855
795
}
856
796
errno = old_errno;
857
return ret;
797
return ret_errno;
858
798
}
859
799
860
800
/* Lower privileges permanently */
861
801
__attribute__((warn_unused_result))
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
864
int ret = 0;
802
error_t lower_privileges_permanently(void){
803
error_t old_errno = errno;
804
error_t ret_errno = 0;
865
805
if(setuid(uid) == -1){
866
ret = errno;
806
ret_errno = errno;
867
807
}
868
808
errno = old_errno;
869
return ret;
809
return ret_errno;
870
810
}
871
811
872
812
/* Helper function to add_local_route() and delete_local_route() */
928
868
perror_plus("dup2(devnull, STDIN_FILENO)");
929
869
_exit(EX_OSERR);
930
870
}
931
ret = close(devnull);
871
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
932
872
if(ret == -1){
933
873
perror_plus("close");
934
874
_exit(EX_OSERR);
951
891
helper, O_RDONLY));
952
892
if(helper_fd == -1){
953
893
perror_plus("openat");
954
close(helperdir_fd);
955
894
_exit(EX_UNAVAILABLE);
956
895
}
957
close(helperdir_fd);
896
TEMP_FAILURE_RETRY(close(helperdir_fd));
958
897
#ifdef __GNUC__
959
898
#pragma GCC diagnostic push
960
899
#pragma GCC diagnostic ignored "-Wcast-qual"
1079
1018
bool match = false;
1080
1019
{
1081
1020
char *interface = NULL;
1082
while((interface = argz_next(mc->interfaces,
1083
mc->interfaces_size,
1084
interface))){
1021
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1022
interface))){
1085
1023
if(if_nametoindex(interface) == (unsigned int)if_index){
1086
1024
match = true;
1087
1025
break;
1129
1067
goto mandos_end;
1130
1068
}
1131
1069
1070
memset(&to, 0, sizeof(to));
1132
1071
if(af == AF_INET6){
1133
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&to;
1134
*to6 = (struct sockaddr_in6){ .sin6_family = (sa_family_t)af };
1135
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);
1136
1074
} else { /* IPv4 */
1137
struct sockaddr_in *to4 = (struct sockaddr_in *)&to;
1138
*to4 = (struct sockaddr_in){ .sin_family = (sa_family_t)af };
1139
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);
1140
1077
}
1141
1078
if(ret < 0 ){
1142
1079
int e = errno;
1221
1158
sizeof(struct sockaddr_in));
1222
1159
}
1223
1160
if(ret < 0){
1224
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1161
if(errno == ENETUNREACH
1225
1162
and if_index != AVAHI_IF_UNSPEC
1226
1163
and connect_to == NULL
1227
1164
and not route_added and
1240
1177
with an explicit route added with the server's address.
1241
1178
1242
1179
Avahi bug reference:
1243
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1180
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
1181
https://bugs.debian.org/587961
1245
1182
*/
1246
1183
if(debug){
1426
1363
&decrypted_buffer, mc);
1427
1364
if(decrypted_buffer_size >= 0){
1428
1365
1429
clearerr(stdout);
1430
1366
written = 0;
1431
1367
while(written < (size_t) decrypted_buffer_size){
1432
1368
if(quit_now){
1448
1384
}
1449
1385
written += (size_t)ret;
1450
1386
}
1451
ret = fflush(stdout);
1452
if(ret != 0){
1453
int e = errno;
1454
if(debug){
1455
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1456
strerror(errno));
1457
}
1458
errno = e;
1459
goto mandos_end;
1460
}
1461
1387
retval = 0;
1462
1388
}
1463
1389
}
1476
1402
free(decrypted_buffer);
1477
1403
free(buffer);
1478
1404
if(tcp_sd >= 0){
1479
ret = close(tcp_sd);
1405
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1480
1406
}
1481
1407
if(ret == -1){
1482
1408
if(e == 0){
1494
1420
return retval;
1495
1421
}
1496
1422
1423
__attribute__((nonnull))
1497
1424
static void resolve_callback(AvahiSServiceResolver *r,
1498
1425
AvahiIfIndex interface,
1499
1426
AvahiProtocol proto,
1636
1563
__attribute__((nonnull, warn_unused_result))
1637
1564
bool get_flags(const char *ifname, struct ifreq *ifr){
1638
1565
int ret;
1639
int old_errno;
1566
error_t ret_errno;
1640
1567
1641
1568
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1642
1569
if(s < 0){
1643
old_errno = errno;
1570
ret_errno = errno;
1644
1571
perror_plus("socket");
1645
errno = old_errno;
1572
errno = ret_errno;
1646
1573
return false;
1647
1574
}
1648
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1649
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1575
strcpy(ifr->ifr_name, ifname);
1650
1576
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1651
1577
if(ret == -1){
1652
1578
if(debug){
1653
old_errno = errno;
1579
ret_errno = errno;
1654
1580
perror_plus("ioctl SIOCGIFFLAGS");
1655
errno = old_errno;
1581
errno = ret_errno;
1656
1582
}
1657
1583
return false;
1658
1584
}
1922
1848
return;
1923
1849
}
1924
1850
}
1851
#ifdef __GLIBC__
1852
#if __GLIBC_PREREQ(2, 15)
1925
1853
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1926
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__ */
1927
1863
if(numhooks == -1){
1928
1864
perror_plus("scandir");
1929
1865
return;
2011
1947
perror_plus("openat");
2012
1948
_exit(EXIT_FAILURE);
2013
1949
}
2014
if(close(hookdir_fd) == -1){
1950
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2015
1951
perror_plus("close");
2016
1952
_exit(EXIT_FAILURE);
2017
1953
}
2020
1956
perror_plus("dup2(devnull, STDIN_FILENO)");
2021
1957
_exit(EX_OSERR);
2022
1958
}
2023
ret = close(devnull);
1959
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2024
1960
if(ret == -1){
2025
1961
perror_plus("close");
2026
1962
_exit(EX_OSERR);
2075
2011
free(direntry);
2076
2012
}
2077
2013
free(direntries);
2078
if(close(hookdir_fd) == -1){
2014
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2079
2015
perror_plus("close");
2080
2016
} else {
2081
2017
hookdir_fd = -1;
2084
2020
}
2085
2021
2086
2022
__attribute__((nonnull, warn_unused_result))
2087
int bring_up_interface(const char *const interface,
2088
const float delay){
2089
int old_errno = errno;
2023
error_t bring_up_interface(const char *const interface,
2024
const float delay){
2025
error_t old_errno = errno;
2090
2026
int ret;
2091
2027
struct ifreq network;
2092
2028
unsigned int if_index = if_nametoindex(interface);
2102
2038
}
2103
2039
2104
2040
if(not interface_is_up(interface)){
2105
int ret_errno = 0;
2106
int ioctl_errno = 0;
2041
error_t ret_errno = 0, ioctl_errno = 0;
2107
2042
if(not get_flags(interface, &network)){
2108
2043
ret_errno = errno;
2109
2044
fprintf_plus(stderr, "Failed to get flags for interface "
2122
2057
}
2123
2058
2124
2059
if(quit_now){
2125
ret = close(sd);
2060
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2126
2061
if(ret == -1){
2127
2062
perror_plus("close");
2128
2063
}
2178
2113
}
2179
2114
2180
2115
/* Close the socket */
2181
ret = close(sd);
2116
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2182
2117
if(ret == -1){
2183
2118
perror_plus("close");
2184
2119
}
2196
2131
2197
2132
/* Sleep checking until interface is running.
2198
2133
Check every 0.25s, up to total time of delay */
2199
for(int i = 0; i < delay * 4; i++){
2134
for(int i=0; i < delay * 4; i++){
2200
2135
if(interface_is_running(interface)){
2201
2136
break;
2202
2137
}
2212
2147
}
2213
2148
2214
2149
__attribute__((nonnull, warn_unused_result))
2215
int take_down_interface(const char *const interface){
2216
int old_errno = errno;
2150
error_t take_down_interface(const char *const interface){
2151
error_t old_errno = errno;
2217
2152
struct ifreq network;
2218
2153
unsigned int if_index = if_nametoindex(interface);
2219
2154
if(if_index == 0){
2222
2157
return ENXIO;
2223
2158
}
2224
2159
if(interface_is_up(interface)){
2225
int ret_errno = 0;
2226
int ioctl_errno = 0;
2160
error_t ret_errno = 0, ioctl_errno = 0;
2227
2161
if(not get_flags(interface, &network) and debug){
2228
2162
ret_errno = errno;
2229
2163
fprintf_plus(stderr, "Failed to get flags for interface "
2267
2201
}
2268
2202
2269
2203
/* Close the socket */
2270
int ret = close(sd);
2204
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2271
2205
if(ret == -1){
2272
2206
perror_plus("close");
2273
2207
}
2289
2223
2290
2224
int main(int argc, char *argv[]){
2291
2225
mandos_context mc = { .server = NULL, .dh_bits = 0,
2292
.priority = "SECURE256:!CTYPE-X.509"
2293
":+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256",
2294
.current_server = NULL, .interfaces = NULL,
2295
.interfaces_size = 0 };
2226
.priority = "SECURE256:!CTYPE-X.509:"
2227
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2228
.interfaces = NULL, .interfaces_size = 0 };
2296
2229
AvahiSServiceBrowser *sb = NULL;
2297
2230
error_t ret_errno;
2298
2231
int ret;
2307
2240
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2308
2241
const char *seckey = PATHDIR "/" SECKEY;
2309
2242
const char *pubkey = PATHDIR "/" PUBKEY;
2310
const char *dh_params_file = NULL;
2311
2243
char *interfaces_hooks = NULL;
2312
2244
2313
2245
bool gnutls_initialized = false;
2366
2298
.doc = "Bit length of the prime number used in the"
2367
2299
" Diffie-Hellman key exchange",
2368
2300
.group = 2 },
2369
{ .name = "dh-params", .key = 134,
2370
.arg = "FILE",
2371
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2372
" for the Diffie-Hellman key exchange",
2373
.group = 2 },
2374
2301
{ .name = "priority", .key = 130,
2375
2302
.arg = "STRING",
2376
2303
.doc = "GnuTLS priority string for the TLS handshake",
2431
2358
}
2432
2359
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2433
2360
break;
2434
case 134: /* --dh-params */
2435
dh_params_file = arg;
2436
break;
2437
2361
case 130: /* --priority */
2438
2362
mc.priority = arg;
2439
2363
break;
2479
2403
.args_doc = "",
2480
2404
.doc = "Mandos client -- Get and decrypt"
2481
2405
" passwords from a Mandos server" };
2482
ret_errno = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
switch(ret_errno){
2406
ret = argp_parse(&argp, argc, argv,
2407
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2408
switch(ret){
2485
2409
case 0:
2486
2410
break;
2487
2411
case ENOMEM:
2488
2412
default:
2489
errno = ret_errno;
2413
errno = ret;
2490
2414
perror_plus("argp_parse");
2491
2415
exitcode = EX_OSERR;
2492
2416
goto end;
2498
2422
2499
2423
{
2500
2424
/* Work around Debian bug #633582:
2501
<https://bugs.debian.org/633582> */
2425
<http://bugs.debian.org/633582> */
2502
2426
2503
2427
/* Re-raise privileges */
2504
ret = raise_privileges();
2505
if(ret != 0){
2506
errno = ret;
2428
ret_errno = raise_privileges();
2429
if(ret_errno != 0){
2430
errno = ret_errno;
2507
2431
perror_plus("Failed to raise privileges");
2508
2432
} else {
2509
2433
struct stat st;
2525
2449
}
2526
2450
}
2527
2451
}
2528
close(seckey_fd);
2452
TEMP_FAILURE_RETRY(close(seckey_fd));
2529
2453
}
2530
2454
}
2531
2455
2546
2470
}
2547
2471
}
2548
2472
}
2549
close(pubkey_fd);
2550
}
2551
}
2552
2553
if(dh_params_file != NULL
2554
and strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2555
int dhparams_fd = open(dh_params_file, O_RDONLY);
2556
if(dhparams_fd == -1){
2557
perror_plus("open");
2558
} else {
2559
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2560
if(ret == -1){
2561
perror_plus("fstat");
2562
} else {
2563
if(S_ISREG(st.st_mode)
2564
and st.st_uid == 0 and st.st_gid == 0){
2565
ret = fchown(dhparams_fd, uid, gid);
2566
if(ret == -1){
2567
perror_plus("fchown");
2568
}
2569
}
2570
}
2571
close(dhparams_fd);
2473
TEMP_FAILURE_RETRY(close(pubkey_fd));
2572
2474
}
2573
2475
}
2574
2476
2575
2477
/* Lower privileges */
2576
ret = lower_privileges();
2577
if(ret != 0){
2578
errno = ret;
2478
ret_errno = lower_privileges();
2479
if(ret_errno != 0){
2480
errno = ret_errno;
2579
2481
perror_plus("Failed to lower privileges");
2580
2482
}
2581
2483
}
2751
2653
errno = bring_up_interface(interface, delay);
2752
2654
if(not interface_was_up){
2753
2655
if(errno != 0){
2754
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2755
" %s\n", interface, strerror(errno));
2656
perror_plus("Failed to bring up interface");
2756
2657
} else {
2757
2658
errno = argz_add(&interfaces_to_take_down,
2758
2659
&interfaces_to_take_down_size,
2781
2682
goto end;
2782
2683
}
2783
2684
2784
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2685
ret = init_gnutls_global(pubkey, seckey, &mc);
2785
2686
if(ret == -1){
2786
2687
fprintf_plus(stderr, "init_gnutls_global failed\n");
2787
2688
exitcode = EX_UNAVAILABLE;
2909
2810
2910
2811
/* Allocate a new server */
2911
2812
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2912
&config, NULL, NULL, &ret);
2813
&config, NULL, NULL, &ret_errno);
2913
2814
2914
2815
/* Free the Avahi configuration data */
2915
2816
avahi_server_config_free(&config);
2918
2819
/* Check if creating the Avahi server object succeeded */
2919
2820
if(mc.server == NULL){
2920
2821
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2921
avahi_strerror(ret));
2822
avahi_strerror(ret_errno));
2922
2823
exitcode = EX_UNAVAILABLE;
2923
2824
goto end;
2924
2825
}
2959
2860
end:
2960
2861
2961
2862
if(debug){
2962
if(signal_received){
2963
fprintf_plus(stderr, "%s exiting due to signal %d: %s\n",
2964
argv[0], signal_received,
2965
strsignal(signal_received));
2966
} else {
2967
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2968
}
2863
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2969
2864
}
2970
2865
2971
2866
/* Cleanup things */
2982
2877
2983
2878
if(gnutls_initialized){
2984
2879
gnutls_certificate_free_credentials(mc.cred);
2880
gnutls_global_deinit();
2985
2881
gnutls_dh_params_deinit(mc.dh_params);
2986
2882
}
2987
2883
3010
2906
3011
2907
/* Re-raise privileges */
3012
2908
{
3013
ret = raise_privileges();
3014
if(ret != 0){
3015
errno = ret;
2909
ret_errno = raise_privileges();
2910
if(ret_errno != 0){
2911
errno = ret_errno;
3016
2912
perror_plus("Failed to raise privileges");
3017
2913
} else {
3018
2914
3023
2919
/* Take down the network interfaces which were brought up */
3024
2920
{
3025
2921
char *interface = NULL;
3026
while((interface = argz_next(interfaces_to_take_down,
3027
interfaces_to_take_down_size,
3028
interface))){
3029
ret = take_down_interface(interface);
3030
if(ret != 0){
3031
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;
3032
2928
perror_plus("Failed to take down interface");
3033
2929
}
3034
2930
}
3039
2935
}
3040
2936
}
3041
2937
3042
ret = lower_privileges_permanently();
3043
if(ret != 0){
3044
errno = ret;
2938
ret_errno = lower_privileges_permanently();
2939
if(ret_errno != 0){
2940
errno = ret_errno;
3045
2941
perror_plus("Failed to lower privileges permanently");
3046
2942
}
3047
2943
}
3049
2945
free(interfaces_to_take_down);
3050
2946
free(interfaces_hooks);
3051
2947
3052
void clean_dir_at(int base, const char * const dirname,
3053
uintmax_t level){
3054
struct dirent **direntries = NULL;
3055
int dret;
3056
int dir_fd = (int)TEMP_FAILURE_RETRY(openat(base, dirname,
3057
O_RDONLY
3058
| O_NOFOLLOW
3059
| O_DIRECTORY
3060
| O_PATH));
3061
if(dir_fd == -1){
3062
perror_plus("open");
3063
}
3064
int numentries = scandirat(dir_fd, ".", &direntries,
3065
notdotentries, alphasort);
3066
if(numentries >= 0){
3067
for(int i = 0; i < numentries; i++){
3068
if(debug){
3069
fprintf_plus(stderr, "Unlinking \"%s/%s\"\n",
3070
dirname, direntries[i]->d_name);
3071
}
3072
dret = unlinkat(dir_fd, direntries[i]->d_name, 0);
3073
if(dret == -1){
3074
if(errno == EISDIR){
3075
dret = unlinkat(dir_fd, direntries[i]->d_name,
3076
AT_REMOVEDIR);
3077
}
3078
if((dret == -1) and (errno == ENOTEMPTY)
3079
and (strcmp(direntries[i]->d_name, "private-keys-v1.d")
3080
== 0) and (level == 0)){
3081
/* Recurse only in this special case */
3082
clean_dir_at(dir_fd, direntries[i]->d_name, level+1);
3083
dret = 0;
3084
}
3085
if(dret == -1){
3086
fprintf_plus(stderr, "unlink(\"%s/%s\"): %s\n", dirname,
3087
direntries[i]->d_name, strerror(errno));
3088
}
3089
}
3090
free(direntries[i]);
3091
}
3092
3093
/* need to clean even if 0 because man page doesn't specify */
3094
free(direntries);
3095
if(numentries == -1){
3096
perror_plus("scandirat");
3097
}
3098
dret = unlinkat(base, dirname, AT_REMOVEDIR);
3099
if(dret == -1 and errno != ENOENT){
3100
perror_plus("rmdir");
3101
}
3102
} else {
3103
perror_plus("scandirat");
3104
}
3105
close(dir_fd);
3106
}
3107
3108
2948
/* Removes the GPGME temp directory and all files inside */
3109
2949
if(tempdir != NULL){
3110
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
}
3111
2993
}
3112
2994
3113
2995
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0