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- Committer: Teddy Hogeborn
- Date: 2009-09-08 06:28:20 UTC
- Revision ID: teddy@fukt.bsnet.se-20090908062820-xgkdkrnvuze9vc72
* debian/mandos-client.README.Debian: Improved wording and formatting.
Updated location of nfsroot.txt.
* debian/mandos.README.Debian: Improved wording and formatting.
Updated location of nfsroot.txt.
* debian/mandos.README.Debian: Improved wording and formatting.
added
removed
plugins.d/mandos-client.c
43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time(), sleep() */
66
#include <time.h> /* nanosleep(), time() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
75
setgid() */
76
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
85
88
86
#ifdef __linux__
89
87
#include <sys/klog.h> /* klogctl() */
127
125
static const char mandos_protocol_version[] = "1";
128
126
const char *argp_program_version = "mandos-client " VERSION;
129
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
static const char sys_class_net[] = "/sys/class/net";
131
char *connect_to = NULL;
132
128
133
129
/* Used for passing in values through the Avahi callback functions */
134
130
typedef struct {
146
142
.dh_bits = 1024, .priority = "SECURE256"
147
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
148
144
149
sig_atomic_t quit_now = 0;
150
int signal_received = 0;
151
152
145
/*
153
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
147
* bytes. "buffer_capacity" is how much is currently allocated,
481
474
static int init_gnutls_session(gnutls_session_t *session){
482
475
int ret;
483
476
/* GnuTLS session creation */
484
do {
485
ret = gnutls_init(session, GNUTLS_SERVER);
486
if(quit_now){
487
return -1;
488
}
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_init(session, GNUTLS_SERVER);
490
478
if(ret != GNUTLS_E_SUCCESS){
491
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
480
safer_gnutls_strerror(ret));
494
482
495
483
{
496
484
const char *err;
497
do {
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
499
if(quit_now){
500
gnutls_deinit(*session);
501
return -1;
502
}
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
504
486
if(ret != GNUTLS_E_SUCCESS){
505
487
fprintf(stderr, "Syntax error at: %s\n", err);
506
488
fprintf(stderr, "GnuTLS error: %s\n",
510
492
}
511
493
}
512
494
513
do {
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
515
mc.cred);
516
if(quit_now){
517
gnutls_deinit(*session);
518
return -1;
519
}
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
521
497
if(ret != GNUTLS_E_SUCCESS){
522
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
499
safer_gnutls_strerror(ret));
526
502
}
527
503
528
504
/* ignore client certificate if any. */
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
530
507
531
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
532
509
537
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
538
515
__attribute__((unused)) const char *txt){}
539
516
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
540
520
/* Called when a Mandos server is found */
541
521
static int start_mandos_communication(const char *ip, uint16_t port,
542
522
AvahiIfIndex if_index,
548
528
struct sockaddr_in6 in6;
549
529
} to;
550
530
char *buffer = NULL;
551
char *decrypted_buffer = NULL;
531
char *decrypted_buffer;
552
532
size_t buffer_length = 0;
553
533
size_t buffer_capacity = 0;
554
534
size_t written;
555
int retval = -1;
535
int retval = 0;
556
536
gnutls_session_t session;
557
537
int pf; /* Protocol family */
558
538
559
errno = 0;
560
561
539
if(quit_now){
562
errno = EINTR;
563
540
return -1;
564
541
}
565
542
572
549
break;
573
550
default:
574
551
fprintf(stderr, "Bad address family: %d\n", af);
575
errno = EINVAL;
576
552
return -1;
577
553
}
578
554
588
564
589
565
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
566
if(tcp_sd < 0){
591
int e = errno;
592
567
perror("socket");
593
errno = e;
568
retval = -1;
594
569
goto mandos_end;
595
570
}
596
571
597
572
if(quit_now){
598
errno = EINTR;
599
573
goto mandos_end;
600
574
}
601
575
608
582
ret = inet_pton(af, ip, &to.in.sin_addr);
609
583
}
610
584
if(ret < 0 ){
611
int e = errno;
612
585
perror("inet_pton");
613
errno = e;
586
retval = -1;
614
587
goto mandos_end;
615
588
}
616
589
if(ret == 0){
617
int e = errno;
618
590
fprintf(stderr, "Bad address: %s\n", ip);
619
errno = e;
591
retval = -1;
620
592
goto mandos_end;
621
593
}
622
594
if(af == AF_INET6){
630
602
if(if_index == AVAHI_IF_UNSPEC){
631
603
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
604
" without a network interface\n");
633
errno = EINVAL;
605
retval = -1;
634
606
goto mandos_end;
635
607
}
636
608
/* Set the network interface number as scope */
643
615
}
644
616
645
617
if(quit_now){
646
errno = EINTR;
647
618
goto mandos_end;
648
619
}
649
620
680
651
}
681
652
682
653
if(quit_now){
683
errno = EINTR;
684
654
goto mandos_end;
685
655
}
686
656
690
660
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
691
661
}
692
662
if(ret < 0){
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
int e = errno;
695
perror("connect");
696
errno = e;
697
}
663
perror("connect");
664
retval = -1;
698
665
goto mandos_end;
699
666
}
700
667
701
668
if(quit_now){
702
errno = EINTR;
703
669
goto mandos_end;
704
670
}
705
671
710
676
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
711
677
out_size - written));
712
678
if(ret == -1){
713
int e = errno;
714
679
perror("write");
715
errno = e;
680
retval = -1;
716
681
goto mandos_end;
717
682
}
718
683
written += (size_t)ret;
728
693
}
729
694
730
695
if(quit_now){
731
errno = EINTR;
732
696
goto mandos_end;
733
697
}
734
698
}
738
702
}
739
703
740
704
if(quit_now){
741
errno = EINTR;
742
705
goto mandos_end;
743
706
}
744
707
745
708
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
746
709
747
710
if(quit_now){
748
errno = EINTR;
749
711
goto mandos_end;
750
712
}
751
713
752
714
do {
753
715
ret = gnutls_handshake(session);
754
716
if(quit_now){
755
errno = EINTR;
756
717
goto mandos_end;
757
718
}
758
719
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
762
723
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
763
724
gnutls_perror(ret);
764
725
}
765
errno = EPROTO;
726
retval = -1;
766
727
goto mandos_end;
767
728
}
768
729
776
737
while(true){
777
738
778
739
if(quit_now){
779
errno = EINTR;
780
740
goto mandos_end;
781
741
}
782
742
783
743
buffer_capacity = incbuffer(&buffer, buffer_length,
784
744
buffer_capacity);
785
745
if(buffer_capacity == 0){
786
int e = errno;
787
746
perror("incbuffer");
788
errno = e;
747
retval = -1;
789
748
goto mandos_end;
790
749
}
791
750
792
751
if(quit_now){
793
errno = EINTR;
794
752
goto mandos_end;
795
753
}
796
754
809
767
ret = gnutls_handshake(session);
810
768
811
769
if(quit_now){
812
errno = EINTR;
813
770
goto mandos_end;
814
771
}
815
772
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
816
773
if(ret < 0){
817
774
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
818
775
gnutls_perror(ret);
819
errno = EPROTO;
776
retval = -1;
820
777
goto mandos_end;
821
778
}
822
779
break;
823
780
default:
824
781
fprintf(stderr, "Unknown error while reading data from"
825
782
" encrypted session with Mandos server\n");
783
retval = -1;
826
784
gnutls_bye(session, GNUTLS_SHUT_RDWR);
827
errno = EIO;
828
785
goto mandos_end;
829
786
}
830
787
} else {
837
794
}
838
795
839
796
if(quit_now){
840
errno = EINTR;
841
goto mandos_end;
842
}
843
844
do {
845
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
846
if(quit_now){
847
errno = EINTR;
848
goto mandos_end;
849
}
850
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
797
goto mandos_end;
798
}
799
800
gnutls_bye(session, GNUTLS_SHUT_RDWR);
801
802
if(quit_now){
803
goto mandos_end;
804
}
851
805
852
806
if(buffer_length > 0){
853
807
ssize_t decrypted_buffer_size;
859
813
written = 0;
860
814
while(written < (size_t) decrypted_buffer_size){
861
815
if(quit_now){
862
errno = EINTR;
863
816
goto mandos_end;
864
817
}
865
818
867
820
(size_t)decrypted_buffer_size - written,
868
821
stdout);
869
822
if(ret == 0 and ferror(stdout)){
870
int e = errno;
871
823
if(debug){
872
824
fprintf(stderr, "Error writing encrypted data: %s\n",
873
825
strerror(errno));
874
826
}
875
errno = e;
876
goto mandos_end;
827
retval = -1;
828
break;
877
829
}
878
830
written += (size_t)ret;
879
831
}
880
retval = 0;
832
free(decrypted_buffer);
833
} else {
834
retval = -1;
881
835
}
836
} else {
837
retval = -1;
882
838
}
883
839
884
840
/* Shutdown procedure */
885
841
886
842
mandos_end:
887
{
888
int e = errno;
889
free(decrypted_buffer);
890
free(buffer);
891
if(tcp_sd >= 0){
892
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
893
}
894
if(ret == -1){
895
if(e == 0){
896
e = errno;
897
}
898
perror("close");
899
}
900
gnutls_deinit(session);
901
if(quit_now){
902
e = EINTR;
903
retval = -1;
904
}
905
errno = e;
843
free(buffer);
844
if(tcp_sd >= 0){
845
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
846
}
847
if(ret == -1){
848
perror("close");
849
}
850
gnutls_deinit(session);
851
if(quit_now){
852
retval = -1;
906
853
}
907
854
return retval;
908
855
}
1024
971
errno = old_errno;
1025
972
}
1026
973
1027
/*
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1031
*/
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
1042
return 0;
1043
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1081
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1084
}
1085
free(flagstring);
1086
return 0;
1087
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1092
if(debug){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1095
}
1096
return 0;
1097
}
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1100
if(debug){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1103
}
1104
return 1;
1105
}
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1114
/* Accept this device */
1115
if(debug){
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1120
}
1121
1122
974
int main(int argc, char *argv[]){
1123
975
AvahiSServiceBrowser *sb = NULL;
1124
976
int error;
1126
978
intmax_t tmpmax;
1127
979
char *tmp;
1128
980
int exitcode = EXIT_SUCCESS;
1129
const char *interface = "";
981
const char *interface = "eth0";
1130
982
struct ifreq network;
1131
983
int sd = -1;
1132
984
bool take_down_interface = false;
1133
985
uid_t uid;
1134
986
gid_t gid;
987
char *connect_to = NULL;
1135
988
char tempdir[] = "/tmp/mandosXXXXXX";
1136
989
bool tempdir_created = false;
1137
990
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1142
995
bool gpgme_initialized = false;
1143
996
float delay = 2.5f;
1144
997
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
998
struct sigaction old_sigterm_action;
1146
999
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1147
1000
1148
uid = getuid();
1149
gid = getgid();
1150
1151
/* Lower any group privileges we might have, just to be safe */
1152
errno = 0;
1153
ret = setgid(gid);
1154
if(ret == -1){
1155
perror("setgid");
1156
}
1157
1158
/* Lower user privileges (temporarily) */
1159
errno = 0;
1160
ret = seteuid(uid);
1161
if(ret == -1){
1162
perror("seteuid");
1163
}
1164
1165
if(quit_now){
1166
goto end;
1167
}
1168
1169
1001
{
1170
1002
struct argp_option options[] = {
1171
1003
{ .name = "debug", .key = 128,
1200
1032
.arg = "SECONDS",
1201
1033
.doc = "Maximum delay to wait for interface startup",
1202
1034
.group = 2 },
1203
/*
1204
* These reproduce what we would get without ARGP_NO_HELP
1205
*/
1206
{ .name = "help", .key = '?',
1207
.doc = "Give this help list", .group = -1 },
1208
{ .name = "usage", .key = -3,
1209
.doc = "Give a short usage message", .group = -1 },
1210
{ .name = "version", .key = 'V',
1211
.doc = "Print program version", .group = -1 },
1212
1035
{ .name = NULL }
1213
1036
};
1214
1037
1215
1038
error_t parse_opt(int key, char *arg,
1216
1039
struct argp_state *state){
1217
errno = 0;
1218
1040
switch(key){
1219
1041
case 128: /* --debug */
1220
1042
debug = true;
1236
1058
tmpmax = strtoimax(arg, &tmp, 10);
1237
1059
if(errno != 0 or tmp == arg or *tmp != '\0'
1238
1060
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1239
argp_error(state, "Bad number of DH bits");
1061
fprintf(stderr, "Bad number of DH bits\n");
1062
exit(EXIT_FAILURE);
1240
1063
}
1241
1064
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1242
1065
break;
1247
1070
errno = 0;
1248
1071
delay = strtof(arg, &tmp);
1249
1072
if(errno != 0 or tmp == arg or *tmp != '\0'){
1250
argp_error(state, "Bad delay");
1073
fprintf(stderr, "Bad delay\n");
1074
exit(EXIT_FAILURE);
1251
1075
}
1252
1076
break;
1253
/*
1254
* These reproduce what we would get without ARGP_NO_HELP
1255
*/
1256
case '?': /* --help */
1257
argp_state_help(state, state->out_stream,
1258
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1259
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1260
case -3: /* --usage */
1261
argp_state_help(state, state->out_stream,
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1263
case 'V': /* --version */
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1265
exit(argp_err_exit_status);
1077
case ARGP_KEY_ARG:
1078
argp_usage(state);
1079
case ARGP_KEY_END:
1266
1080
break;
1267
1081
default:
1268
1082
return ARGP_ERR_UNKNOWN;
1269
1083
}
1270
return errno;
1084
return 0;
1271
1085
}
1272
1086
1273
1087
struct argp argp = { .options = options, .parser = parse_opt,
1274
1088
.args_doc = "",
1275
1089
.doc = "Mandos client -- Get and decrypt"
1276
1090
" passwords from a Mandos server" };
1277
ret = argp_parse(&argp, argc, argv,
1278
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1279
switch(ret){
1280
case 0:
1281
break;
1282
case ENOMEM:
1283
default:
1284
errno = ret;
1285
perror("argp_parse");
1286
exitcode = EX_OSERR;
1287
goto end;
1288
case EINVAL:
1289
exitcode = EX_USAGE;
1091
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1092
if(ret == ARGP_ERR_UNKNOWN){
1093
fprintf(stderr, "Unknown error while parsing arguments\n");
1094
exitcode = EXIT_FAILURE;
1290
1095
goto end;
1291
1096
}
1292
1097
}
1294
1099
if(not debug){
1295
1100
avahi_set_log_function(empty_log);
1296
1101
}
1297
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1301
alphasort);
1302
if(ret >= 1){
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1305
if(debug){
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1307
}
1308
if(interface == NULL){
1309
perror("malloc");
1310
free(direntries);
1311
exitcode = EXIT_FAILURE;
1312
goto end;
1313
}
1314
free(direntries);
1315
} else {
1316
free(direntries);
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
1319
goto end;
1320
}
1321
}
1322
1102
1323
1103
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1324
1104
from the signal handler */
1327
1107
mc.simple_poll = avahi_simple_poll_new();
1328
1108
if(mc.simple_poll == NULL){
1329
1109
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1330
exitcode = EX_UNAVAILABLE;
1110
exitcode = EXIT_FAILURE;
1331
1111
goto end;
1332
1112
}
1333
1113
1335
1115
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1336
1116
if(ret == -1){
1337
1117
perror("sigaddset");
1338
exitcode = EX_OSERR;
1118
exitcode = EXIT_FAILURE;
1339
1119
goto end;
1340
1120
}
1341
1121
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1342
1122
if(ret == -1){
1343
1123
perror("sigaddset");
1344
exitcode = EX_OSERR;
1124
exitcode = EXIT_FAILURE;
1345
1125
goto end;
1346
1126
}
1347
1127
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1348
1128
if(ret == -1){
1349
1129
perror("sigaddset");
1350
exitcode = EX_OSERR;
1130
exitcode = EXIT_FAILURE;
1351
1131
goto end;
1352
1132
}
1353
1133
/* Need to check if the handler is SIG_IGN before handling:
1357
1137
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1358
1138
if(ret == -1){
1359
1139
perror("sigaction");
1360
return EX_OSERR;
1140
return EXIT_FAILURE;
1361
1141
}
1362
1142
if(old_sigterm_action.sa_handler != SIG_IGN){
1363
1143
ret = sigaction(SIGINT, &sigterm_action, NULL);
1364
1144
if(ret == -1){
1365
1145
perror("sigaction");
1366
exitcode = EX_OSERR;
1146
exitcode = EXIT_FAILURE;
1367
1147
goto end;
1368
1148
}
1369
1149
}
1370
1150
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1371
1151
if(ret == -1){
1372
1152
perror("sigaction");
1373
return EX_OSERR;
1153
return EXIT_FAILURE;
1374
1154
}
1375
1155
if(old_sigterm_action.sa_handler != SIG_IGN){
1376
1156
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1377
1157
if(ret == -1){
1378
1158
perror("sigaction");
1379
exitcode = EX_OSERR;
1159
exitcode = EXIT_FAILURE;
1380
1160
goto end;
1381
1161
}
1382
1162
}
1383
1163
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1384
1164
if(ret == -1){
1385
1165
perror("sigaction");
1386
return EX_OSERR;
1166
return EXIT_FAILURE;
1387
1167
}
1388
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
1389
1169
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1390
1170
if(ret == -1){
1391
1171
perror("sigaction");
1392
exitcode = EX_OSERR;
1172
exitcode = EXIT_FAILURE;
1393
1173
goto end;
1394
1174
}
1395
1175
}
1396
1176
1397
1177
/* If the interface is down, bring it up */
1398
if(strcmp(interface, "none") != 0){
1178
if(interface[0] != '\0'){
1399
1179
if_index = (AvahiIfIndex) if_nametoindex(interface);
1400
1180
if(if_index == 0){
1401
1181
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1402
exitcode = EX_UNAVAILABLE;
1182
exitcode = EXIT_FAILURE;
1403
1183
goto end;
1404
1184
}
1405
1185
1407
1187
goto end;
1408
1188
}
1409
1189
1410
/* Re-raise priviliges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror("seteuid");
1415
}
1416
1417
1190
#ifdef __linux__
1418
1191
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1419
messages about the network interface to mess up the prompt */
1192
messages to mess up the prompt */
1420
1193
ret = klogctl(8, NULL, 5);
1421
1194
bool restore_loglevel = true;
1422
1195
if(ret == -1){
1428
1201
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1429
1202
if(sd < 0){
1430
1203
perror("socket");
1431
exitcode = EX_OSERR;
1204
exitcode = EXIT_FAILURE;
1432
1205
#ifdef __linux__
1433
1206
if(restore_loglevel){
1434
1207
ret = klogctl(7, NULL, 0);
1437
1210
}
1438
1211
}
1439
1212
#endif /* __linux__ */
1440
/* Lower privileges */
1441
errno = 0;
1442
ret = seteuid(uid);
1443
if(ret == -1){
1444
perror("seteuid");
1445
}
1446
1213
goto end;
1447
1214
}
1448
1215
strcpy(network.ifr_name, interface);
1457
1224
}
1458
1225
}
1459
1226
#endif /* __linux__ */
1460
exitcode = EX_OSERR;
1461
/* Lower privileges */
1462
errno = 0;
1463
ret = seteuid(uid);
1464
if(ret == -1){
1465
perror("seteuid");
1466
}
1227
exitcode = EXIT_FAILURE;
1467
1228
goto end;
1468
1229
}
1469
1230
if((network.ifr_flags & IFF_UP) == 0){
1472
1233
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1473
1234
if(ret == -1){
1474
1235
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1476
exitcode = EX_OSERR;
1236
perror("ioctl SIOCSIFFLAGS");
1237
exitcode = EXIT_FAILURE;
1477
1238
#ifdef __linux__
1478
1239
if(restore_loglevel){
1479
1240
ret = klogctl(7, NULL, 0);
1482
1243
}
1483
1244
}
1484
1245
#endif /* __linux__ */
1485
/* Lower privileges */
1486
errno = 0;
1487
ret = seteuid(uid);
1488
if(ret == -1){
1489
perror("seteuid");
1490
}
1491
1246
goto end;
1492
1247
}
1493
1248
}
1521
1276
}
1522
1277
}
1523
1278
#endif /* __linux__ */
1524
/* Lower privileges */
1525
errno = 0;
1526
if(take_down_interface){
1527
/* Lower privileges */
1528
ret = seteuid(uid);
1529
if(ret == -1){
1530
perror("seteuid");
1531
}
1532
} else {
1533
/* Lower privileges permanently */
1534
ret = setuid(uid);
1535
if(ret == -1){
1536
perror("setuid");
1537
}
1279
}
1280
1281
if(quit_now){
1282
goto end;
1283
}
1284
1285
uid = getuid();
1286
gid = getgid();
1287
1288
/* Drop any group privileges we might have, just to be safe */
1289
errno = 0;
1290
ret = setgid(gid);
1291
if(ret == -1){
1292
perror("setgid");
1293
}
1294
1295
/* Drop user privileges */
1296
errno = 0;
1297
/* Will we need privileges later? */
1298
if(take_down_interface){
1299
/* Drop user privileges temporarily */
1300
ret = seteuid(uid);
1301
if(ret == -1){
1302
perror("seteuid");
1303
}
1304
} else {
1305
/* Drop user privileges permanently */
1306
ret = setuid(uid);
1307
if(ret == -1){
1308
perror("setuid");
1538
1309
}
1539
1310
}
1540
1311
1545
1316
ret = init_gnutls_global(pubkey, seckey);
1546
1317
if(ret == -1){
1547
1318
fprintf(stderr, "init_gnutls_global failed\n");
1548
exitcode = EX_UNAVAILABLE;
1319
exitcode = EXIT_FAILURE;
1549
1320
goto end;
1550
1321
} else {
1551
1322
gnutls_initialized = true;
1568
1339
1569
1340
if(not init_gpgme(pubkey, seckey, tempdir)){
1570
1341
fprintf(stderr, "init_gpgme failed\n");
1571
exitcode = EX_UNAVAILABLE;
1342
exitcode = EXIT_FAILURE;
1572
1343
goto end;
1573
1344
} else {
1574
1345
gpgme_initialized = true;
1584
1355
char *address = strrchr(connect_to, ':');
1585
1356
if(address == NULL){
1586
1357
fprintf(stderr, "No colon in address\n");
1587
exitcode = EX_USAGE;
1358
exitcode = EXIT_FAILURE;
1588
1359
goto end;
1589
1360
}
1590
1361
1598
1369
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1599
1370
or tmpmax != (uint16_t)tmpmax){
1600
1371
fprintf(stderr, "Bad port number\n");
1601
exitcode = EX_USAGE;
1372
exitcode = EXIT_FAILURE;
1602
1373
goto end;
1603
1374
}
1604
1375
1620
1391
if(quit_now){
1621
1392
goto end;
1622
1393
}
1623
1624
while(not quit_now){
1625
ret = start_mandos_communication(address, port, if_index, af);
1626
if(quit_now or ret == 0){
1627
break;
1628
}
1629
sleep(15);
1630
};
1631
1632
if (not quit_now){
1394
1395
ret = start_mandos_communication(address, port, if_index, af);
1396
if(ret < 0){
1397
exitcode = EXIT_FAILURE;
1398
} else {
1633
1399
exitcode = EXIT_SUCCESS;
1634
1400
}
1635
1636
1401
goto end;
1637
1402
}
1638
1403
1662
1427
if(mc.server == NULL){
1663
1428
fprintf(stderr, "Failed to create Avahi server: %s\n",
1664
1429
avahi_strerror(error));
1665
exitcode = EX_UNAVAILABLE;
1430
exitcode = EXIT_FAILURE;
1666
1431
goto end;
1667
1432
}
1668
1433
1677
1442
if(sb == NULL){
1678
1443
fprintf(stderr, "Failed to create service browser: %s\n",
1679
1444
avahi_strerror(avahi_server_errno(mc.server)));
1680
exitcode = EX_UNAVAILABLE;
1445
exitcode = EXIT_FAILURE;
1681
1446
goto end;
1682
1447
}
1683
1448
1732
1497
if(ret == -1){
1733
1498
perror("ioctl SIOCGIFFLAGS");
1734
1499
} else if(network.ifr_flags & IFF_UP) {
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1500
network.ifr_flags &= ~IFF_UP; /* clear flag */
1736
1501
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1737
1502
if(ret == -1){
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1503
perror("ioctl SIOCSIFFLAGS");
1739
1504
}
1740
1505
}
1741
1506
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1742
1507
if(ret == -1){
1743
1508
perror("close");
1744
1509
}
1745
/* Lower privileges permanently */
1510
/* Lower privileges, permanently this time */
1746
1511
errno = 0;
1747
1512
ret = setuid(uid);
1748
1513
if(ret == -1){
1798
1563
if(quit_now){
1799
1564
sigemptyset(&old_sigterm_action.sa_mask);
1800
1565
old_sigterm_action.sa_handler = SIG_DFL;
1801
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1802
&old_sigterm_action,
1803
NULL));
1566
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1804
1567
if(ret == -1){
1805
1568
perror("sigaction");
1806
1569
}
1807
do {
1808
ret = raise(signal_received);
1809
} while(ret != 0 and errno == EINTR);
1810
if(ret != 0){
1811
perror("raise");
1812
abort();
1813
}
1814
TEMP_FAILURE_RETRY(pause());
1570
raise(signal_received);
1815
1571
}
1816
1572
1817
1573
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0