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- Committer: Teddy Hogeborn
- Date: 2017-02-21 22:15:43 UTC
- Revision ID: teddy@recompile.se-20170221221543-kkh15uag0luiyz4y
Remove useless code (and use "read -r") in initramfs-tools-hook
* initramfs-tools-hook: When reading module names from network hooks
given the "modules" argument, use "read -r" and ignore ${target}
variable (left over from code above it).
* initramfs-tools-hook: When reading module names from network hooks
given the "modules" argument, use "read -r" and ignore ${target}
variable (left over from code above it).
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
12
* Copyright © 2008-2016 Teddy Hogeborn
13
* Copyright © 2008-2016 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> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
49
#include <string.h> /* strcmp(), strlen(), strerror(),
50
asprintf(), strncpy(), strsignal()
51
*/
51
52
#include <sys/ioctl.h> /* ioctl */
52
53
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
54
sockaddr_in6, PF_INET6,
57
58
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
59
inet_pton(), connect(),
59
60
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
61
#include <fcntl.h> /* open(), unlinkat(), AT_REMOVEDIR */
61
62
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
63
*/
63
64
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
65
strtoimax() */
65
#include <errno.h> /* perror(), errno,
66
#include <errno.h> /* perror(), errno, EINTR, EINVAL,
67
EAI_SYSTEM, ENETUNREACH,
68
EHOSTUNREACH, ECONNREFUSED, EPROTO,
69
EIO, ENOENT, ENXIO, ENOMEM, EISDIR,
70
ENOTEMPTY,
66
71
program_invocation_short_name */
67
72
#include <time.h> /* nanosleep(), time(), sleep() */
68
73
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
305
310
return false;
306
311
}
307
312
308
ret = (int)TEMP_FAILURE_RETRY(close(fd));
313
ret = close(fd);
309
314
if(ret == -1){
310
315
perror_plus("close");
311
316
}
493
498
return plaintext_length;
494
499
}
495
500
501
__attribute__((warn_unused_result, const))
502
static const char *safe_string(const char *str){
503
if(str == NULL)
504
return "(unknown)";
505
return str;
506
}
507
496
508
__attribute__((warn_unused_result))
497
509
static const char *safer_gnutls_strerror(int value){
498
510
const char *ret = gnutls_strerror(value);
499
if(ret == NULL)
500
ret = "(unknown)";
501
return ret;
511
return safe_string(ret);
502
512
}
503
513
504
514
/* GnuTLS log function callback */
508
518
fprintf_plus(stderr, "GnuTLS: %s", string);
509
519
}
510
520
511
__attribute__((nonnull, warn_unused_result))
521
__attribute__((nonnull(1, 2, 4), warn_unused_result))
512
522
static int init_gnutls_global(const char *pubkeyfilename,
513
523
const char *seckeyfilename,
524
const char *dhparamsfilename,
514
525
mandos_context *mc){
515
526
int ret;
527
unsigned int uret;
516
528
517
529
if(debug){
518
530
fprintf_plus(stderr, "Initializing GnuTLS\n");
519
531
}
520
532
521
ret = gnutls_global_init();
522
if(ret != GNUTLS_E_SUCCESS){
523
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
524
safer_gnutls_strerror(ret));
525
return -1;
526
}
527
528
533
if(debug){
529
534
/* "Use a log level over 10 to enable all debugging options."
530
535
* - GnuTLS manual
538
543
if(ret != GNUTLS_E_SUCCESS){
539
544
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
540
545
safer_gnutls_strerror(ret));
541
gnutls_global_deinit();
542
546
return -1;
543
547
}
544
548
569
573
safer_gnutls_strerror(ret));
570
574
goto globalfail;
571
575
}
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
573
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
575
safer_gnutls_strerror(ret));
576
goto globalfail;
577
}
578
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;
587
while(true){
588
params_capacity = incbuffer((char **)¶ms.data,
589
(size_t)params.size,
590
(size_t)params_capacity);
591
if(params_capacity == 0){
592
perror_plus("incbuffer");
593
free(params.data);
594
params.data = NULL;
595
dhparamsfilename = NULL;
596
break;
597
}
598
ssize_t bytes_read = read(dhpfile,
599
params.data + params.size,
600
BUFFER_SIZE);
601
/* EOF */
602
if(bytes_read == 0){
603
break;
604
}
605
/* check bytes_read for failure */
606
if(bytes_read < 0){
607
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);
678
if(ret != GNUTLS_E_SUCCESS){
679
fprintf_plus(stderr, "Error initializing OpenPGP key"
680
" structure: %s",
681
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
}
706
}
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)));
716
}
717
}
718
}
719
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
720
if(uret != 0){
721
mc->dh_bits = uret;
722
if(debug){
723
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
724
" implies %u DH bits; using that.\n",
725
safe_string(gnutls_sec_param_get_name
726
(sec_param)),
727
mc->dh_bits);
728
}
729
} else {
730
fprintf_plus(stderr, "Failed to get implied number of DH"
731
" bits for security parameter \"%s\"): %s\n",
732
safe_string(gnutls_sec_param_get_name
733
(sec_param)),
734
safer_gnutls_strerror(ret));
735
goto globalfail;
736
}
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,
745
safer_gnutls_strerror(ret));
746
goto globalfail;
747
}
748
}
579
749
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
580
750
581
751
return 0;
583
753
globalfail:
584
754
585
755
gnutls_certificate_free_credentials(mc->cred);
586
gnutls_global_deinit();
587
756
gnutls_dh_params_deinit(mc->dh_params);
588
757
return -1;
589
758
}
641
810
/* ignore client certificate if any. */
642
811
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
643
812
644
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
645
646
813
return 0;
647
814
}
648
815
652
819
653
820
/* Set effective uid to 0, return errno */
654
821
__attribute__((warn_unused_result))
655
error_t raise_privileges(void){
656
error_t old_errno = errno;
657
error_t ret_errno = 0;
822
int raise_privileges(void){
823
int old_errno = errno;
824
int ret = 0;
658
825
if(seteuid(0) == -1){
659
ret_errno = errno;
826
ret = errno;
660
827
}
661
828
errno = old_errno;
662
return ret_errno;
829
return ret;
663
830
}
664
831
665
832
/* Set effective and real user ID to 0. Return errno. */
666
833
__attribute__((warn_unused_result))
667
error_t raise_privileges_permanently(void){
668
error_t old_errno = errno;
669
error_t ret_errno = raise_privileges();
670
if(ret_errno != 0){
834
int raise_privileges_permanently(void){
835
int old_errno = errno;
836
int ret = raise_privileges();
837
if(ret != 0){
671
838
errno = old_errno;
672
return ret_errno;
839
return ret;
673
840
}
674
841
if(setuid(0) == -1){
675
ret_errno = errno;
842
ret = errno;
676
843
}
677
844
errno = old_errno;
678
return ret_errno;
845
return ret;
679
846
}
680
847
681
848
/* Set effective user ID to unprivileged saved user ID */
682
849
__attribute__((warn_unused_result))
683
error_t lower_privileges(void){
684
error_t old_errno = errno;
685
error_t ret_errno = 0;
850
int lower_privileges(void){
851
int old_errno = errno;
852
int ret = 0;
686
853
if(seteuid(uid) == -1){
687
ret_errno = errno;
854
ret = errno;
688
855
}
689
856
errno = old_errno;
690
return ret_errno;
857
return ret;
691
858
}
692
859
693
860
/* Lower privileges permanently */
694
861
__attribute__((warn_unused_result))
695
error_t lower_privileges_permanently(void){
696
error_t old_errno = errno;
697
error_t ret_errno = 0;
862
int lower_privileges_permanently(void){
863
int old_errno = errno;
864
int ret = 0;
698
865
if(setuid(uid) == -1){
699
ret_errno = errno;
866
ret = errno;
700
867
}
701
868
errno = old_errno;
702
return ret_errno;
869
return ret;
703
870
}
704
871
705
/* Helper function to add_local_route() and remove_local_route() */
872
/* Helper function to add_local_route() and delete_local_route() */
706
873
__attribute__((nonnull, warn_unused_result))
707
static bool add_remove_local_route(const bool add,
874
static bool add_delete_local_route(const bool add,
708
875
const char *address,
709
876
AvahiIfIndex if_index){
710
877
int ret;
711
878
char helper[] = "mandos-client-iprouteadddel";
712
879
char add_arg[] = "add";
713
char remove_arg[] = "remove";
880
char delete_arg[] = "delete";
881
char debug_flag[] = "--debug";
714
882
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
715
883
if(pluginhelperdir == NULL){
716
884
if(debug){
760
928
perror_plus("dup2(devnull, STDIN_FILENO)");
761
929
_exit(EX_OSERR);
762
930
}
763
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
931
ret = close(devnull);
764
932
if(ret == -1){
765
933
perror_plus("close");
766
934
_exit(EX_OSERR);
783
951
helper, O_RDONLY));
784
952
if(helper_fd == -1){
785
953
perror_plus("openat");
954
close(helperdir_fd);
786
955
_exit(EX_UNAVAILABLE);
787
956
}
788
TEMP_FAILURE_RETRY(close(helperdir_fd));
957
close(helperdir_fd);
789
958
#ifdef __GNUC__
790
959
#pragma GCC diagnostic push
791
960
#pragma GCC diagnostic ignored "-Wcast-qual"
792
961
#endif
793
962
if(fexecve(helper_fd, (char *const [])
794
{ helper, add ? add_arg : remove_arg, (char *)address,
795
interface, NULL }, environ) == -1){
963
{ helper, add ? add_arg : delete_arg, (char *)address,
964
interface, debug ? debug_flag : NULL, NULL },
965
environ) == -1){
796
966
#ifdef __GNUC__
797
967
#pragma GCC diagnostic pop
798
968
#endif
850
1020
__attribute__((nonnull, warn_unused_result))
851
1021
static bool add_local_route(const char *address,
852
1022
AvahiIfIndex if_index){
853
return add_remove_local_route(true, address, if_index);
1023
if(debug){
1024
fprintf_plus(stderr, "Adding route to %s\n", address);
1025
}
1026
return add_delete_local_route(true, address, if_index);
854
1027
}
855
1028
856
1029
__attribute__((nonnull, warn_unused_result))
857
static bool remove_local_route(const char *address,
1030
static bool delete_local_route(const char *address,
858
1031
AvahiIfIndex if_index){
859
return add_remove_local_route(false, address, if_index);
1032
if(debug){
1033
fprintf_plus(stderr, "Removing route to %s\n", address);
1034
}
1035
return add_delete_local_route(false, address, if_index);
860
1036
}
861
1037
862
1038
/* Called when a Mandos server is found */
903
1079
bool match = false;
904
1080
{
905
1081
char *interface = NULL;
906
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
907
interface))){
1082
while((interface = argz_next(mc->interfaces,
1083
mc->interfaces_size,
1084
interface))){
908
1085
if(if_nametoindex(interface) == (unsigned int)if_index){
909
1086
match = true;
910
1087
break;
952
1129
goto mandos_end;
953
1130
}
954
1131
955
memset(&to, 0, sizeof(to));
956
1132
if(af == AF_INET6){
957
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
958
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
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);
959
1136
} else { /* IPv4 */
960
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
961
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
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);
962
1140
}
963
1141
if(ret < 0 ){
964
1142
int e = errno;
1043
1221
sizeof(struct sockaddr_in));
1044
1222
}
1045
1223
if(ret < 0){
1046
if(errno == ENETUNREACH
1224
if(((errno == ENETUNREACH) or (errno == EHOSTUNREACH))
1047
1225
and if_index != AVAHI_IF_UNSPEC
1048
1226
and connect_to == NULL
1049
1227
and not route_added and
1062
1240
with an explicit route added with the server's address.
1063
1241
1064
1242
Avahi bug reference:
1065
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1243
https://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1066
1244
https://bugs.debian.org/587961
1067
1245
*/
1246
if(debug){
1247
fprintf_plus(stderr, "Mandos server unreachable, trying"
1248
" direct route\n");
1249
}
1068
1250
int e = errno;
1069
1251
route_added = add_local_route(ip, if_index);
1070
1252
if(route_added){
1244
1426
&decrypted_buffer, mc);
1245
1427
if(decrypted_buffer_size >= 0){
1246
1428
1429
clearerr(stdout);
1247
1430
written = 0;
1248
1431
while(written < (size_t) decrypted_buffer_size){
1249
1432
if(quit_now){
1265
1448
}
1266
1449
written += (size_t)ret;
1267
1450
}
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
}
1268
1461
retval = 0;
1269
1462
}
1270
1463
}
1274
1467
mandos_end:
1275
1468
{
1276
1469
if(route_added){
1277
if(not remove_local_route(ip, if_index)){
1278
fprintf_plus(stderr, "Failed to remove local route to %s on"
1470
if(not delete_local_route(ip, if_index)){
1471
fprintf_plus(stderr, "Failed to delete local route to %s on"
1279
1472
" interface %d", ip, if_index);
1280
1473
}
1281
1474
}
1283
1476
free(decrypted_buffer);
1284
1477
free(buffer);
1285
1478
if(tcp_sd >= 0){
1286
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1479
ret = close(tcp_sd);
1287
1480
}
1288
1481
if(ret == -1){
1289
1482
if(e == 0){
1301
1494
return retval;
1302
1495
}
1303
1496
1304
__attribute__((nonnull))
1305
1497
static void resolve_callback(AvahiSServiceResolver *r,
1306
1498
AvahiIfIndex interface,
1307
1499
AvahiProtocol proto,
1444
1636
__attribute__((nonnull, warn_unused_result))
1445
1637
bool get_flags(const char *ifname, struct ifreq *ifr){
1446
1638
int ret;
1447
error_t ret_errno;
1639
int old_errno;
1448
1640
1449
1641
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1450
1642
if(s < 0){
1451
ret_errno = errno;
1643
old_errno = errno;
1452
1644
perror_plus("socket");
1453
errno = ret_errno;
1645
errno = old_errno;
1454
1646
return false;
1455
1647
}
1456
strcpy(ifr->ifr_name, ifname);
1648
strncpy(ifr->ifr_name, ifname, IF_NAMESIZE);
1649
ifr->ifr_name[IF_NAMESIZE-1] = '\0'; /* NUL terminate */
1457
1650
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1458
1651
if(ret == -1){
1459
1652
if(debug){
1460
ret_errno = errno;
1653
old_errno = errno;
1461
1654
perror_plus("ioctl SIOCGIFFLAGS");
1462
errno = ret_errno;
1655
errno = old_errno;
1463
1656
}
1464
1657
return false;
1465
1658
}
1729
1922
return;
1730
1923
}
1731
1924
}
1732
#ifdef __GLIBC__
1733
#if __GLIBC_PREREQ(2, 15)
1734
1925
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1735
1926
runnable_hook, alphasort);
1736
#else /* not __GLIBC_PREREQ(2, 15) */
1737
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1738
alphasort);
1739
#endif /* not __GLIBC_PREREQ(2, 15) */
1740
#else /* not __GLIBC__ */
1741
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1742
alphasort);
1743
#endif /* not __GLIBC__ */
1744
1927
if(numhooks == -1){
1745
1928
perror_plus("scandir");
1746
1929
return;
1828
2011
perror_plus("openat");
1829
2012
_exit(EXIT_FAILURE);
1830
2013
}
1831
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2014
if(close(hookdir_fd) == -1){
1832
2015
perror_plus("close");
1833
2016
_exit(EXIT_FAILURE);
1834
2017
}
1837
2020
perror_plus("dup2(devnull, STDIN_FILENO)");
1838
2021
_exit(EX_OSERR);
1839
2022
}
1840
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2023
ret = close(devnull);
1841
2024
if(ret == -1){
1842
2025
perror_plus("close");
1843
2026
_exit(EX_OSERR);
1892
2075
free(direntry);
1893
2076
}
1894
2077
free(direntries);
1895
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2078
if(close(hookdir_fd) == -1){
1896
2079
perror_plus("close");
1897
2080
} else {
1898
2081
hookdir_fd = -1;
1901
2084
}
1902
2085
1903
2086
__attribute__((nonnull, warn_unused_result))
1904
error_t bring_up_interface(const char *const interface,
1905
const float delay){
1906
error_t old_errno = errno;
2087
int bring_up_interface(const char *const interface,
2088
const float delay){
2089
int old_errno = errno;
1907
2090
int ret;
1908
2091
struct ifreq network;
1909
2092
unsigned int if_index = if_nametoindex(interface);
1919
2102
}
1920
2103
1921
2104
if(not interface_is_up(interface)){
1922
error_t ret_errno = 0, ioctl_errno = 0;
2105
int ret_errno = 0;
2106
int ioctl_errno = 0;
1923
2107
if(not get_flags(interface, &network)){
1924
2108
ret_errno = errno;
1925
2109
fprintf_plus(stderr, "Failed to get flags for interface "
1938
2122
}
1939
2123
1940
2124
if(quit_now){
1941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2125
ret = close(sd);
1942
2126
if(ret == -1){
1943
2127
perror_plus("close");
1944
2128
}
1994
2178
}
1995
2179
1996
2180
/* Close the socket */
1997
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2181
ret = close(sd);
1998
2182
if(ret == -1){
1999
2183
perror_plus("close");
2000
2184
}
2012
2196
2013
2197
/* Sleep checking until interface is running.
2014
2198
Check every 0.25s, up to total time of delay */
2015
for(int i=0; i < delay * 4; i++){
2199
for(int i = 0; i < delay * 4; i++){
2016
2200
if(interface_is_running(interface)){
2017
2201
break;
2018
2202
}
2028
2212
}
2029
2213
2030
2214
__attribute__((nonnull, warn_unused_result))
2031
error_t take_down_interface(const char *const interface){
2032
error_t old_errno = errno;
2215
int take_down_interface(const char *const interface){
2216
int old_errno = errno;
2033
2217
struct ifreq network;
2034
2218
unsigned int if_index = if_nametoindex(interface);
2035
2219
if(if_index == 0){
2038
2222
return ENXIO;
2039
2223
}
2040
2224
if(interface_is_up(interface)){
2041
error_t ret_errno = 0, ioctl_errno = 0;
2225
int ret_errno = 0;
2226
int ioctl_errno = 0;
2042
2227
if(not get_flags(interface, &network) and debug){
2043
2228
ret_errno = errno;
2044
2229
fprintf_plus(stderr, "Failed to get flags for interface "
2082
2267
}
2083
2268
2084
2269
/* Close the socket */
2085
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2270
int ret = close(sd);
2086
2271
if(ret == -1){
2087
2272
perror_plus("close");
2088
2273
}
2103
2288
}
2104
2289
2105
2290
int main(int argc, char *argv[]){
2106
mandos_context mc = { .server = NULL, .dh_bits = 1024,
2107
.priority = "SECURE256:!CTYPE-X.509:"
2108
"+CTYPE-OPENPGP", .current_server = NULL,
2109
.interfaces = NULL, .interfaces_size = 0 };
2291
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 };
2110
2296
AvahiSServiceBrowser *sb = NULL;
2111
2297
error_t ret_errno;
2112
2298
int ret;
2121
2307
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2122
2308
const char *seckey = PATHDIR "/" SECKEY;
2123
2309
const char *pubkey = PATHDIR "/" PUBKEY;
2310
const char *dh_params_file = NULL;
2124
2311
char *interfaces_hooks = NULL;
2125
2312
2126
2313
bool gnutls_initialized = false;
2179
2366
.doc = "Bit length of the prime number used in the"
2180
2367
" Diffie-Hellman key exchange",
2181
2368
.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 },
2182
2374
{ .name = "priority", .key = 130,
2183
2375
.arg = "STRING",
2184
2376
.doc = "GnuTLS priority string for the TLS handshake",
2239
2431
}
2240
2432
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2241
2433
break;
2434
case 134: /* --dh-params */
2435
dh_params_file = arg;
2436
break;
2242
2437
case 130: /* --priority */
2243
2438
mc.priority = arg;
2244
2439
break;
2284
2479
.args_doc = "",
2285
2480
.doc = "Mandos client -- Get and decrypt"
2286
2481
" passwords from a Mandos server" };
2287
ret = argp_parse(&argp, argc, argv,
2288
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2289
switch(ret){
2482
ret_errno = argp_parse(&argp, argc, argv,
2483
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2484
switch(ret_errno){
2290
2485
case 0:
2291
2486
break;
2292
2487
case ENOMEM:
2293
2488
default:
2294
errno = ret;
2489
errno = ret_errno;
2295
2490
perror_plus("argp_parse");
2296
2491
exitcode = EX_OSERR;
2297
2492
goto end;
2303
2498
2304
2499
{
2305
2500
/* Work around Debian bug #633582:
2306
<http://bugs.debian.org/633582> */
2501
<https://bugs.debian.org/633582> */
2307
2502
2308
2503
/* Re-raise privileges */
2309
ret_errno = raise_privileges();
2310
if(ret_errno != 0){
2311
errno = ret_errno;
2504
ret = raise_privileges();
2505
if(ret != 0){
2506
errno = ret;
2312
2507
perror_plus("Failed to raise privileges");
2313
2508
} else {
2314
2509
struct stat st;
2330
2525
}
2331
2526
}
2332
2527
}
2333
TEMP_FAILURE_RETRY(close(seckey_fd));
2528
close(seckey_fd);
2334
2529
}
2335
2530
}
2336
2531
2351
2546
}
2352
2547
}
2353
2548
}
2354
TEMP_FAILURE_RETRY(close(pubkey_fd));
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);
2355
2572
}
2356
2573
}
2357
2574
2358
2575
/* Lower privileges */
2359
ret_errno = lower_privileges();
2360
if(ret_errno != 0){
2361
errno = ret_errno;
2576
ret = lower_privileges();
2577
if(ret != 0){
2578
errno = ret;
2362
2579
perror_plus("Failed to lower privileges");
2363
2580
}
2364
2581
}
2534
2751
errno = bring_up_interface(interface, delay);
2535
2752
if(not interface_was_up){
2536
2753
if(errno != 0){
2537
perror_plus("Failed to bring up interface");
2754
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2755
" %s\n", interface, strerror(errno));
2538
2756
} else {
2539
2757
errno = argz_add(&interfaces_to_take_down,
2540
2758
&interfaces_to_take_down_size,
2563
2781
goto end;
2564
2782
}
2565
2783
2566
ret = init_gnutls_global(pubkey, seckey, &mc);
2784
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
2567
2785
if(ret == -1){
2568
2786
fprintf_plus(stderr, "init_gnutls_global failed\n");
2569
2787
exitcode = EX_UNAVAILABLE;
2691
2909
2692
2910
/* Allocate a new server */
2693
2911
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2694
&config, NULL, NULL, &ret_errno);
2912
&config, NULL, NULL, &ret);
2695
2913
2696
2914
/* Free the Avahi configuration data */
2697
2915
avahi_server_config_free(&config);
2700
2918
/* Check if creating the Avahi server object succeeded */
2701
2919
if(mc.server == NULL){
2702
2920
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2703
avahi_strerror(ret_errno));
2921
avahi_strerror(ret));
2704
2922
exitcode = EX_UNAVAILABLE;
2705
2923
goto end;
2706
2924
}
2741
2959
end:
2742
2960
2743
2961
if(debug){
2744
fprintf_plus(stderr, "%s exiting\n", argv[0]);
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
}
2745
2969
}
2746
2970
2747
2971
/* Cleanup things */
2758
2982
2759
2983
if(gnutls_initialized){
2760
2984
gnutls_certificate_free_credentials(mc.cred);
2761
gnutls_global_deinit();
2762
2985
gnutls_dh_params_deinit(mc.dh_params);
2763
2986
}
2764
2987
2787
3010
2788
3011
/* Re-raise privileges */
2789
3012
{
2790
ret_errno = raise_privileges();
2791
if(ret_errno != 0){
2792
errno = ret_errno;
3013
ret = raise_privileges();
3014
if(ret != 0){
3015
errno = ret;
2793
3016
perror_plus("Failed to raise privileges");
2794
3017
} else {
2795
3018
2800
3023
/* Take down the network interfaces which were brought up */
2801
3024
{
2802
3025
char *interface = NULL;
2803
while((interface=argz_next(interfaces_to_take_down,
2804
interfaces_to_take_down_size,
2805
interface))){
2806
ret_errno = take_down_interface(interface);
2807
if(ret_errno != 0){
2808
errno = ret_errno;
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;
2809
3032
perror_plus("Failed to take down interface");
2810
3033
}
2811
3034
}
2816
3039
}
2817
3040
}
2818
3041
2819
ret_errno = lower_privileges_permanently();
2820
if(ret_errno != 0){
2821
errno = ret_errno;
3042
ret = lower_privileges_permanently();
3043
if(ret != 0){
3044
errno = ret;
2822
3045
perror_plus("Failed to lower privileges permanently");
2823
3046
}
2824
3047
}
2826
3049
free(interfaces_to_take_down);
2827
3050
free(interfaces_hooks);
2828
3051
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
2829
3108
/* Removes the GPGME temp directory and all files inside */
2830
3109
if(tempdir != NULL){
2831
struct dirent **direntries = NULL;
2832
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2833
| O_NOFOLLOW
2834
| O_DIRECTORY
2835
| O_PATH));
2836
if(tempdir_fd == -1){
2837
perror_plus("open");
2838
} else {
2839
#ifdef __GLIBC__
2840
#if __GLIBC_PREREQ(2, 15)
2841
int numentries = scandirat(tempdir_fd, ".", &direntries,
2842
notdotentries, alphasort);
2843
#else /* not __GLIBC_PREREQ(2, 15) */
2844
int numentries = scandir(tempdir, &direntries, notdotentries,
2845
alphasort);
2846
#endif /* not __GLIBC_PREREQ(2, 15) */
2847
#else /* not __GLIBC__ */
2848
int numentries = scandir(tempdir, &direntries, notdotentries,
2849
alphasort);
2850
#endif /* not __GLIBC__ */
2851
if(numentries >= 0){
2852
for(int i = 0; i < numentries; i++){
2853
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2854
if(ret == -1){
2855
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2856
" \"%s\", 0): %s\n", tempdir,
2857
direntries[i]->d_name, strerror(errno));
2858
}
2859
free(direntries[i]);
2860
}
2861
2862
/* need to clean even if 0 because man page doesn't specify */
2863
free(direntries);
2864
if(numentries == -1){
2865
perror_plus("scandir");
2866
}
2867
ret = rmdir(tempdir);
2868
if(ret == -1 and errno != ENOENT){
2869
perror_plus("rmdir");
2870
}
2871
}
2872
TEMP_FAILURE_RETRY(close(tempdir_fd));
2873
}
3110
clean_dir_at(-1, tempdir, 0);
2874
3111
}
2875
3112
2876
3113
if(quit_now){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0