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- Committer: Teddy Hogeborn
- Date: 2009-02-09 19:26:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20090209192619-7rse82x9pypq4ihk
* plugin-runner.c: Comment change.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
* plugins.d/mandos-client.c: Comment changes.
(quit_now): New global flag.
(handle_sigterm): Only call avahi_simple_poll_quit once.
(main): Also handle SIGINT and SIGHUP.
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
38
#endif
39
35
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
37
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf(),
40
remove() */
44
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
44
srand() */
48
45
#include <stdbool.h> /* bool, false, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
59
56
#include <fcntl.h> /* open() */
60
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
58
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
60
#include <assert.h> /* assert() */
65
61
#include <errno.h> /* perror(), errno */
66
62
#include <time.h> /* nanosleep(), time() */
71
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
68
*/
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
70
getuid(), getgid(), setuid(),
75
71
setgid() */
76
72
#include <arpa/inet.h> /* inet_pton(), htons */
77
73
#include <iso646.h> /* not, or, and */
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
78
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
85
81
86
82
#ifdef __linux__
87
83
#include <sys/klog.h> /* klogctl() */
138
134
} mandos_context;
139
135
140
136
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
145
sig_atomic_t quit_now = 0;
146
int signal_received = 0;
137
mandos_context mc;
147
138
148
139
/*
149
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
167
158
*/
168
159
static bool init_gpgme(const char *seckey,
169
160
const char *pubkey, const char *tempdir){
161
int ret;
170
162
gpgme_error_t rc;
171
163
gpgme_engine_info_t engine_info;
172
164
175
167
* Helper function to insert pub and seckey to the engine keyring.
176
168
*/
177
169
bool import_key(const char *filename){
178
int ret;
179
170
int fd;
180
171
gpgme_data_t pgp_data;
181
172
252
243
return false;
253
244
}
254
245
255
return true;
246
return true;
256
247
}
257
248
258
249
/*
312
303
}
313
304
gpgme_recipient_t recipient;
314
305
recipient = result->recipients;
315
while(recipient != NULL){
316
fprintf(stderr, "Public key algorithm: %s\n",
317
gpgme_pubkey_algo_name(recipient->pubkey_algo));
318
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
319
fprintf(stderr, "Secret key available: %s\n",
320
recipient->status == GPG_ERR_NO_SECKEY
321
? "No" : "Yes");
322
recipient = recipient->next;
306
if(recipient){
307
while(recipient != NULL){
308
fprintf(stderr, "Public key algorithm: %s\n",
309
gpgme_pubkey_algo_name(recipient->pubkey_algo));
310
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
311
fprintf(stderr, "Secret key available: %s\n",
312
recipient->status == GPG_ERR_NO_SECKEY
313
? "No" : "Yes");
314
recipient = recipient->next;
315
}
323
316
}
324
317
}
325
318
}
477
470
static int init_gnutls_session(gnutls_session_t *session){
478
471
int ret;
479
472
/* GnuTLS session creation */
480
do {
481
ret = gnutls_init(session, GNUTLS_SERVER);
482
if(quit_now){
483
return -1;
484
}
485
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
473
ret = gnutls_init(session, GNUTLS_SERVER);
486
474
if(ret != GNUTLS_E_SUCCESS){
487
475
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
488
476
safer_gnutls_strerror(ret));
490
478
491
479
{
492
480
const char *err;
493
do {
494
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
495
if(quit_now){
496
gnutls_deinit(*session);
497
return -1;
498
}
499
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
500
482
if(ret != GNUTLS_E_SUCCESS){
501
483
fprintf(stderr, "Syntax error at: %s\n", err);
502
484
fprintf(stderr, "GnuTLS error: %s\n",
506
488
}
507
489
}
508
490
509
do {
510
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
511
mc.cred);
512
if(quit_now){
513
gnutls_deinit(*session);
514
return -1;
515
}
516
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
491
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
492
mc.cred);
517
493
if(ret != GNUTLS_E_SUCCESS){
518
494
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
519
495
safer_gnutls_strerror(ret));
522
498
}
523
499
524
500
/* ignore client certificate if any. */
525
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
526
503
527
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
528
505
537
514
static int start_mandos_communication(const char *ip, uint16_t port,
538
515
AvahiIfIndex if_index,
539
516
int af){
540
int ret, tcp_sd = -1;
517
int ret, tcp_sd;
541
518
ssize_t sret;
542
519
union {
543
520
struct sockaddr_in in;
547
524
char *decrypted_buffer;
548
525
size_t buffer_length = 0;
549
526
size_t buffer_capacity = 0;
527
ssize_t decrypted_buffer_size;
550
528
size_t written;
551
529
int retval = 0;
552
530
gnutls_session_t session;
553
531
int pf; /* Protocol family */
554
532
555
if(quit_now){
556
return -1;
557
}
558
559
533
switch(af){
560
534
case AF_INET6:
561
535
pf = PF_INET6;
581
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
556
if(tcp_sd < 0){
583
557
perror("socket");
584
retval = -1;
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
retval = -1;
590
goto mandos_end;
558
return -1;
591
559
}
592
560
593
561
memset(&to, 0, sizeof(to));
594
562
if(af == AF_INET6){
595
to.in6.sin6_family = (sa_family_t)af;
563
to.in6.sin6_family = (uint16_t)af;
596
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
597
565
} else { /* IPv4 */
598
566
to.in.sin_family = (sa_family_t)af;
600
568
}
601
569
if(ret < 0 ){
602
570
perror("inet_pton");
603
retval = -1;
604
goto mandos_end;
571
return -1;
605
572
}
606
573
if(ret == 0){
607
574
fprintf(stderr, "Bad address: %s\n", ip);
608
retval = -1;
609
goto mandos_end;
575
return -1;
610
576
}
611
577
if(af == AF_INET6){
612
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
619
585
if(if_index == AVAHI_IF_UNSPEC){
620
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
621
587
" without a network interface\n");
622
retval = -1;
623
goto mandos_end;
588
return -1;
624
589
}
625
590
/* Set the network interface number as scope */
626
591
to.in6.sin6_scope_id = (uint32_t)if_index;
631
596
-Wunreachable-code */
632
597
}
633
598
634
if(quit_now){
635
retval = -1;
636
goto mandos_end;
637
}
638
639
599
if(debug){
640
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
641
601
char interface[IF_NAMESIZE];
668
628
}
669
629
}
670
630
671
if(quit_now){
672
retval = -1;
673
goto mandos_end;
674
}
675
676
631
if(af == AF_INET6){
677
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
678
633
} else {
680
635
}
681
636
if(ret < 0){
682
637
perror("connect");
683
retval = -1;
684
goto mandos_end;
685
}
686
687
if(quit_now){
688
retval = -1;
689
goto mandos_end;
638
return -1;
690
639
}
691
640
692
641
const char *out = mandos_protocol_version;
711
660
break;
712
661
}
713
662
}
714
715
if(quit_now){
716
retval = -1;
717
goto mandos_end;
718
}
719
663
}
720
664
721
665
if(debug){
722
666
fprintf(stderr, "Establishing TLS session with %s\n", ip);
723
667
}
724
668
725
if(quit_now){
726
retval = -1;
727
goto mandos_end;
728
}
729
730
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
731
670
732
if(quit_now){
733
retval = -1;
734
goto mandos_end;
735
}
736
737
do {
671
do{
738
672
ret = gnutls_handshake(session);
739
if(quit_now){
740
retval = -1;
741
goto mandos_end;
742
}
743
673
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
744
674
745
675
if(ret != GNUTLS_E_SUCCESS){
759
689
}
760
690
761
691
while(true){
762
763
if(quit_now){
764
retval = -1;
765
goto mandos_end;
766
}
767
768
692
buffer_capacity = incbuffer(&buffer, buffer_length,
769
693
buffer_capacity);
770
694
if(buffer_capacity == 0){
773
697
goto mandos_end;
774
698
}
775
699
776
if(quit_now){
777
retval = -1;
778
goto mandos_end;
779
}
780
781
700
sret = gnutls_record_recv(session, buffer+buffer_length,
782
701
BUFFER_SIZE);
783
702
if(sret == 0){
789
708
case GNUTLS_E_AGAIN:
790
709
break;
791
710
case GNUTLS_E_REHANDSHAKE:
792
do {
711
do{
793
712
ret = gnutls_handshake(session);
794
795
if(quit_now){
796
retval = -1;
797
goto mandos_end;
798
}
799
713
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
800
714
if(ret < 0){
801
715
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
820
734
fprintf(stderr, "Closing TLS session\n");
821
735
}
822
736
823
if(quit_now){
824
retval = -1;
825
goto mandos_end;
826
}
827
828
do {
829
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
830
if(quit_now){
831
retval = -1;
832
goto mandos_end;
833
}
834
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
835
738
836
739
if(buffer_length > 0){
837
ssize_t decrypted_buffer_size;
838
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
839
741
buffer_length,
840
742
&decrypted_buffer);
841
743
if(decrypted_buffer_size >= 0){
842
843
744
written = 0;
844
745
while(written < (size_t) decrypted_buffer_size){
845
if(quit_now){
846
retval = -1;
847
goto mandos_end;
848
}
849
850
746
ret = (int)fwrite(decrypted_buffer + written, 1,
851
747
(size_t)decrypted_buffer_size - written,
852
748
stdout);
872
768
873
769
mandos_end:
874
770
free(buffer);
875
if(tcp_sd >= 0){
876
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
877
}
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
878
772
if(ret == -1){
879
773
perror("close");
880
774
}
881
775
gnutls_deinit(session);
882
if(quit_now){
883
retval = -1;
884
}
885
776
return retval;
886
777
}
887
778
904
795
/* Called whenever a service has been resolved successfully or
905
796
timed out */
906
797
907
if(quit_now){
908
return;
909
}
910
911
798
switch(event){
912
799
default:
913
800
case AVAHI_RESOLVER_FAILURE:
950
837
/* Called whenever a new services becomes available on the LAN or
951
838
is removed from the LAN */
952
839
953
if(quit_now){
954
return;
955
}
956
957
840
switch(event){
958
841
default:
959
842
case AVAHI_BROWSER_FAILURE:
969
852
the callback function is called the Avahi server will free the
970
853
resolver for us. */
971
854
972
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
973
name, type, domain, protocol, 0,
974
resolve_callback, NULL) == NULL)
855
if(!(avahi_s_service_resolver_new(mc.server, interface,
856
protocol, name, type, domain,
857
AVAHI_PROTO_INET6, 0,
858
resolve_callback, NULL)))
975
859
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
976
860
name, avahi_strerror(avahi_server_errno(mc.server)));
977
861
break;
988
872
}
989
873
}
990
874
991
/* stop main loop after sigterm has been called */
992
static void handle_sigterm(int sig){
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
993
878
if(quit_now){
994
879
return;
995
880
}
996
881
quit_now = 1;
997
signal_received = sig;
998
882
int old_errno = errno;
999
883
if(mc.simple_poll != NULL){
1000
884
avahi_simple_poll_quit(mc.simple_poll);
1007
891
int error;
1008
892
int ret;
1009
893
intmax_t tmpmax;
1010
char *tmp;
894
int numchars;
1011
895
int exitcode = EXIT_SUCCESS;
1012
896
const char *interface = "eth0";
1013
897
struct ifreq network;
1014
int sd = -1;
1015
bool take_down_interface = false;
898
int sd;
1016
899
uid_t uid;
1017
900
gid_t gid;
1018
901
char *connect_to = NULL;
1022
905
const char *seckey = PATHDIR "/" SECKEY;
1023
906
const char *pubkey = PATHDIR "/" PUBKEY;
1024
907
908
/* Initialize Mandos context */
909
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
910
.dh_bits = 1024, .priority = "SECURE256"
911
":!CTYPE-X.509:+CTYPE-OPENPGP" };
1025
912
bool gnutls_initialized = false;
1026
913
bool gpgme_initialized = false;
1027
float delay = 2.5f;
1028
1029
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
1030
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1031
918
1032
uid = getuid();
1033
gid = getgid();
1034
1035
/* Lower any group privileges we might have, just to be safe */
1036
errno = 0;
1037
ret = setgid(gid);
1038
if(ret == -1){
1039
perror("setgid");
1040
}
1041
1042
/* Lower user privileges (temporarily) */
1043
errno = 0;
1044
ret = seteuid(uid);
1045
if(ret == -1){
1046
perror("seteuid");
1047
}
1048
1049
if(quit_now){
1050
goto end;
1051
}
1052
1053
919
{
1054
920
struct argp_option options[] = {
1055
921
{ .name = "debug", .key = 128,
1106
972
pubkey = arg;
1107
973
break;
1108
974
case 129: /* --dh-bits */
1109
errno = 0;
1110
tmpmax = strtoimax(arg, &tmp, 10);
1111
if(errno != 0 or tmp == arg or *tmp != '\0'
1112
or tmpmax != (typeof(mc.dh_bits))tmpmax){
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
1113
978
fprintf(stderr, "Bad number of DH bits\n");
1114
979
exit(EXIT_FAILURE);
1115
980
}
1119
984
mc.priority = arg;
1120
985
break;
1121
986
case 131: /* --delay */
1122
errno = 0;
1123
delay = strtof(arg, &tmp);
1124
if(errno != 0 or tmp == arg or *tmp != '\0'){
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
1125
989
fprintf(stderr, "Bad delay\n");
1126
990
exit(EXIT_FAILURE);
1127
991
}
1148
1012
}
1149
1013
}
1150
1014
1151
if(not debug){
1152
avahi_set_log_function(empty_log);
1153
}
1154
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1156
from the signal handler */
1157
/* Initialize the pseudo-RNG for Avahi */
1158
srand((unsigned int) time(NULL));
1159
mc.simple_poll = avahi_simple_poll_new();
1160
if(mc.simple_poll == NULL){
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
1166
sigemptyset(&sigterm_action.sa_mask);
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1168
if(ret == -1){
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1174
if(ret == -1){
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1177
goto end;
1178
}
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1180
if(ret == -1){
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1183
goto end;
1184
}
1185
/* Need to check if the handler is SIG_IGN before handling:
1186
| [[info:libc:Initial Signal Actions]] |
1187
| [[info:libc:Basic Signal Handling]] |
1188
*/
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1190
if(ret == -1){
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1193
}
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1196
if(ret == -1){
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1199
goto end;
1200
}
1201
}
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1203
if(ret == -1){
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1206
}
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1209
if(ret == -1){
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1214
}
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1216
if(ret == -1){
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1219
}
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1222
if(ret == -1){
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
}
1228
1229
1015
/* If the interface is down, bring it up */
1230
1016
if(interface[0] != '\0'){
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1232
if(if_index == 0){
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1235
goto end;
1236
}
1237
1238
if(quit_now){
1239
goto end;
1240
}
1241
1242
/* Re-raise priviliges */
1243
errno = 0;
1244
ret = seteuid(0);
1245
if(ret == -1){
1246
perror("seteuid");
1247
}
1248
1249
1017
#ifdef __linux__
1250
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
1019
messages to mess up the prompt */
1269
1037
}
1270
1038
}
1271
1039
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
1275
if(ret == -1){
1276
perror("seteuid");
1277
}
1278
1040
goto end;
1279
1041
}
1280
1042
strcpy(network.ifr_name, interface);
1290
1052
}
1291
1053
#endif /* __linux__ */
1292
1054
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1299
1055
goto end;
1300
1056
}
1301
1057
if((network.ifr_flags & IFF_UP) == 0){
1302
1058
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1304
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1305
1060
if(ret == -1){
1306
take_down_interface = false;
1307
1061
perror("ioctl SIOCSIFFLAGS");
1308
1062
exitcode = EXIT_FAILURE;
1309
1063
#ifdef __linux__
1314
1068
}
1315
1069
}
1316
1070
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
1320
if(ret == -1){
1321
perror("seteuid");
1322
}
1323
1071
goto end;
1324
1072
}
1325
1073
}
1337
1085
perror("nanosleep");
1338
1086
}
1339
1087
}
1340
if(not take_down_interface){
1341
/* We won't need the socket anymore */
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1343
if(ret == -1){
1344
perror("close");
1345
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1346
1091
}
1347
1092
#ifdef __linux__
1348
1093
if(restore_loglevel){
1353
1098
}
1354
1099
}
1355
1100
#endif /* __linux__ */
1356
/* Lower privileges */
1357
errno = 0;
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
1370
}
1371
}
1372
1373
if(quit_now){
1374
goto end;
1101
}
1102
1103
uid = getuid();
1104
gid = getgid();
1105
1106
errno = 0;
1107
setgid(gid);
1108
if(ret == -1){
1109
perror("setgid");
1110
}
1111
1112
ret = setuid(uid);
1113
if(ret == -1){
1114
perror("setuid");
1375
1115
}
1376
1116
1377
1117
ret = init_gnutls_global(pubkey, seckey);
1383
1123
gnutls_initialized = true;
1384
1124
}
1385
1125
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1391
1126
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1393
1127
perror("mkdtemp");
1394
1128
goto end;
1395
1129
}
1396
1397
if(quit_now){
1398
goto end;
1399
}
1130
tempdir_created = true;
1400
1131
1401
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1402
1133
fprintf(stderr, "init_gpgme failed\n");
1406
1137
gpgme_initialized = true;
1407
1138
}
1408
1139
1409
if(quit_now){
1410
goto end;
1140
if(interface[0] != '\0'){
1141
if_index = (AvahiIfIndex) if_nametoindex(interface);
1142
if(if_index == 0){
1143
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1411
1147
}
1412
1148
1413
1149
if(connect_to != NULL){
1419
1155
exitcode = EXIT_FAILURE;
1420
1156
goto end;
1421
1157
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1427
1158
uint16_t port;
1428
errno = 0;
1429
tmpmax = strtoimax(address+1, &tmp, 10);
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1431
or tmpmax != (uint16_t)tmpmax){
1159
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1160
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1161
or address[numchars+1] != '\0'){
1432
1162
fprintf(stderr, "Bad port number\n");
1433
1163
exitcode = EXIT_FAILURE;
1434
1164
goto end;
1435
1165
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1441
1166
port = (uint16_t)tmpmax;
1442
1167
*address = '\0';
1443
1168
address = connect_to;
1448
1173
} else {
1449
1174
af = AF_INET;
1450
1175
}
1451
1452
if(quit_now){
1453
goto end;
1454
}
1455
1456
1176
ret = start_mandos_communication(address, port, if_index, af);
1457
1177
if(ret < 0){
1458
1178
exitcode = EXIT_FAILURE;
1462
1182
goto end;
1463
1183
}
1464
1184
1465
if(quit_now){
1185
if(not debug){
1186
avahi_set_log_function(empty_log);
1187
}
1188
1189
/* Initialize the pseudo-RNG for Avahi */
1190
srand((unsigned int) time(NULL));
1191
1192
/* Allocate main Avahi loop object */
1193
mc.simple_poll = avahi_simple_poll_new();
1194
if(mc.simple_poll == NULL){
1195
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1196
exitcode = EXIT_FAILURE;
1466
1197
goto end;
1467
1198
}
1468
1199
1492
1223
goto end;
1493
1224
}
1494
1225
1495
if(quit_now){
1496
goto end;
1497
}
1498
1499
1226
/* Create the Avahi service browser */
1500
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1502
1229
NULL, 0, browse_callback, NULL);
1503
1230
if(sb == NULL){
1504
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1507
1234
goto end;
1508
1235
}
1509
1236
1510
if(quit_now){
1511
goto end;
1512
}
1237
sigemptyset(&sigterm_action.sa_mask);
1238
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1239
if(ret == -1){
1240
perror("sigaddset");
1241
exitcode = EXIT_FAILURE;
1242
goto end;
1243
}
1244
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1245
if(ret == -1){
1246
perror("sigaddset");
1247
exitcode = EXIT_FAILURE;
1248
goto end;
1249
}
1250
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1251
if(ret == -1){
1252
perror("sigaddset");
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1257
if(ret == -1){
1258
perror("sigaction");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1513
1262
1514
1263
/* Run the main loop */
1515
1264
1545
1294
gpgme_release(mc.ctx);
1546
1295
}
1547
1296
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
1551
errno = 0;
1552
ret = seteuid(0);
1553
if(ret == -1){
1554
perror("seteuid");
1555
}
1556
if(geteuid() == 0){
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1558
if(ret == -1){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~IFF_UP; /* clear flag */
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1563
if(ret == -1){
1564
perror("ioctl SIOCSIFFLAGS");
1565
}
1566
}
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1568
if(ret == -1){
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
1576
}
1577
}
1578
}
1579
1580
1297
/* Removes the temp directory used by GPGME */
1581
1298
if(tempdir_created){
1582
1299
DIR *d;
1621
1338
}
1622
1339
}
1623
1340
1624
if(quit_now){
1625
sigemptyset(&old_sigterm_action.sa_mask);
1626
old_sigterm_action.sa_handler = SIG_DFL;
1627
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1628
if(ret == -1){
1629
perror("sigaction");
1630
}
1631
raise(signal_received);
1632
}
1633
1634
1341
return exitcode;
1635
1342
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0