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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(), abort() */
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(),
75
setgid(), pause() */
70
getuid(), getgid(), setuid(),
71
setgid() */
76
72
#include <arpa/inet.h> /* inet_pton(), htons */
77
73
#include <iso646.h> /* not, or, and */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
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;
544
521
struct sockaddr_in6 in6;
545
522
} to;
546
523
char *buffer = NULL;
547
char *decrypted_buffer = NULL;
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
int retval = -1;
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
goto mandos_end;
585
}
586
587
if(quit_now){
588
goto mandos_end;
558
return -1;
589
559
}
590
560
591
561
memset(&to, 0, sizeof(to));
592
562
if(af == AF_INET6){
593
to.in6.sin6_family = (sa_family_t)af;
563
to.in6.sin6_family = (uint16_t)af;
594
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
595
565
} else { /* IPv4 */
596
566
to.in.sin_family = (sa_family_t)af;
598
568
}
599
569
if(ret < 0 ){
600
570
perror("inet_pton");
601
goto mandos_end;
571
return -1;
602
572
}
603
573
if(ret == 0){
604
574
fprintf(stderr, "Bad address: %s\n", ip);
605
goto mandos_end;
575
return -1;
606
576
}
607
577
if(af == AF_INET6){
608
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
615
585
if(if_index == AVAHI_IF_UNSPEC){
616
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
617
587
" without a network interface\n");
618
goto mandos_end;
588
return -1;
619
589
}
620
590
/* Set the network interface number as scope */
621
591
to.in6.sin6_scope_id = (uint32_t)if_index;
626
596
-Wunreachable-code */
627
597
}
628
598
629
if(quit_now){
630
goto mandos_end;
631
}
632
633
599
if(debug){
634
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
635
601
char interface[IF_NAMESIZE];
662
628
}
663
629
}
664
630
665
if(quit_now){
666
goto mandos_end;
667
}
668
669
631
if(af == AF_INET6){
670
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
671
633
} else {
673
635
}
674
636
if(ret < 0){
675
637
perror("connect");
676
goto mandos_end;
677
}
678
679
if(quit_now){
680
goto mandos_end;
638
return -1;
681
639
}
682
640
683
641
const char *out = mandos_protocol_version;
688
646
out_size - written));
689
647
if(ret == -1){
690
648
perror("write");
649
retval = -1;
691
650
goto mandos_end;
692
651
}
693
652
written += (size_t)ret;
701
660
break;
702
661
}
703
662
}
704
705
if(quit_now){
706
goto mandos_end;
707
}
708
663
}
709
664
710
665
if(debug){
711
666
fprintf(stderr, "Establishing TLS session with %s\n", ip);
712
667
}
713
668
714
if(quit_now){
715
goto mandos_end;
716
}
717
718
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
719
670
720
if(quit_now){
721
goto mandos_end;
722
}
723
724
do {
671
do{
725
672
ret = gnutls_handshake(session);
726
if(quit_now){
727
goto mandos_end;
728
}
729
673
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
730
674
731
675
if(ret != GNUTLS_E_SUCCESS){
733
677
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
734
678
gnutls_perror(ret);
735
679
}
680
retval = -1;
736
681
goto mandos_end;
737
682
}
738
683
744
689
}
745
690
746
691
while(true){
747
748
if(quit_now){
749
goto mandos_end;
750
}
751
752
692
buffer_capacity = incbuffer(&buffer, buffer_length,
753
693
buffer_capacity);
754
694
if(buffer_capacity == 0){
755
695
perror("incbuffer");
756
goto mandos_end;
757
}
758
759
if(quit_now){
696
retval = -1;
760
697
goto mandos_end;
761
698
}
762
699
771
708
case GNUTLS_E_AGAIN:
772
709
break;
773
710
case GNUTLS_E_REHANDSHAKE:
774
do {
711
do{
775
712
ret = gnutls_handshake(session);
776
777
if(quit_now){
778
goto mandos_end;
779
}
780
713
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
781
714
if(ret < 0){
782
715
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
783
716
gnutls_perror(ret);
717
retval = -1;
784
718
goto mandos_end;
785
719
}
786
720
break;
787
721
default:
788
722
fprintf(stderr, "Unknown error while reading data from"
789
723
" encrypted session with Mandos server\n");
724
retval = -1;
790
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
791
726
goto mandos_end;
792
727
}
799
734
fprintf(stderr, "Closing TLS session\n");
800
735
}
801
736
802
if(quit_now){
803
goto mandos_end;
804
}
805
806
do {
807
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
808
if(quit_now){
809
goto mandos_end;
810
}
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
812
738
813
739
if(buffer_length > 0){
814
ssize_t decrypted_buffer_size;
815
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
816
741
buffer_length,
817
742
&decrypted_buffer);
818
743
if(decrypted_buffer_size >= 0){
819
820
744
written = 0;
821
745
while(written < (size_t) decrypted_buffer_size){
822
if(quit_now){
823
goto mandos_end;
824
}
825
826
746
ret = (int)fwrite(decrypted_buffer + written, 1,
827
747
(size_t)decrypted_buffer_size - written,
828
748
stdout);
831
751
fprintf(stderr, "Error writing encrypted data: %s\n",
832
752
strerror(errno));
833
753
}
834
goto mandos_end;
754
retval = -1;
755
break;
835
756
}
836
757
written += (size_t)ret;
837
758
}
838
retval = 0;
759
free(decrypted_buffer);
760
} else {
761
retval = -1;
839
762
}
763
} else {
764
retval = -1;
840
765
}
841
766
842
767
/* Shutdown procedure */
843
768
844
769
mandos_end:
845
free(decrypted_buffer);
846
770
free(buffer);
847
if(tcp_sd >= 0){
848
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
849
}
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
772
if(ret == -1){
851
773
perror("close");
852
774
}
853
775
gnutls_deinit(session);
854
if(quit_now){
855
retval = -1;
856
}
857
776
return retval;
858
777
}
859
778
876
795
/* Called whenever a service has been resolved successfully or
877
796
timed out */
878
797
879
if(quit_now){
880
return;
881
}
882
883
798
switch(event){
884
799
default:
885
800
case AVAHI_RESOLVER_FAILURE:
922
837
/* Called whenever a new services becomes available on the LAN or
923
838
is removed from the LAN */
924
839
925
if(quit_now){
926
return;
927
}
928
929
840
switch(event){
930
841
default:
931
842
case AVAHI_BROWSER_FAILURE:
941
852
the callback function is called the Avahi server will free the
942
853
resolver for us. */
943
854
944
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
945
name, type, domain, protocol, 0,
946
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)))
947
859
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
948
860
name, avahi_strerror(avahi_server_errno(mc.server)));
949
861
break;
960
872
}
961
873
}
962
874
963
/* stop main loop after sigterm has been called */
964
static void handle_sigterm(int sig){
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
965
878
if(quit_now){
966
879
return;
967
880
}
968
881
quit_now = 1;
969
signal_received = sig;
970
882
int old_errno = errno;
971
883
if(mc.simple_poll != NULL){
972
884
avahi_simple_poll_quit(mc.simple_poll);
979
891
int error;
980
892
int ret;
981
893
intmax_t tmpmax;
982
char *tmp;
894
int numchars;
983
895
int exitcode = EXIT_SUCCESS;
984
896
const char *interface = "eth0";
985
897
struct ifreq network;
986
int sd = -1;
987
bool take_down_interface = false;
898
int sd;
988
899
uid_t uid;
989
900
gid_t gid;
990
901
char *connect_to = NULL;
994
905
const char *seckey = PATHDIR "/" SECKEY;
995
906
const char *pubkey = PATHDIR "/" PUBKEY;
996
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" };
997
912
bool gnutls_initialized = false;
998
913
bool gpgme_initialized = false;
999
float delay = 2.5f;
1000
1001
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
1002
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1003
918
1004
uid = getuid();
1005
gid = getgid();
1006
1007
/* Lower any group privileges we might have, just to be safe */
1008
errno = 0;
1009
ret = setgid(gid);
1010
if(ret == -1){
1011
perror("setgid");
1012
}
1013
1014
/* Lower user privileges (temporarily) */
1015
errno = 0;
1016
ret = seteuid(uid);
1017
if(ret == -1){
1018
perror("seteuid");
1019
}
1020
1021
if(quit_now){
1022
goto end;
1023
}
1024
1025
919
{
1026
920
struct argp_option options[] = {
1027
921
{ .name = "debug", .key = 128,
1078
972
pubkey = arg;
1079
973
break;
1080
974
case 129: /* --dh-bits */
1081
errno = 0;
1082
tmpmax = strtoimax(arg, &tmp, 10);
1083
if(errno != 0 or tmp == arg or *tmp != '\0'
1084
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'){
1085
978
fprintf(stderr, "Bad number of DH bits\n");
1086
979
exit(EXIT_FAILURE);
1087
980
}
1091
984
mc.priority = arg;
1092
985
break;
1093
986
case 131: /* --delay */
1094
errno = 0;
1095
delay = strtof(arg, &tmp);
1096
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'){
1097
989
fprintf(stderr, "Bad delay\n");
1098
990
exit(EXIT_FAILURE);
1099
991
}
1120
1012
}
1121
1013
}
1122
1014
1123
if(not debug){
1124
avahi_set_log_function(empty_log);
1125
}
1126
1127
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1128
from the signal handler */
1129
/* Initialize the pseudo-RNG for Avahi */
1130
srand((unsigned int) time(NULL));
1131
mc.simple_poll = avahi_simple_poll_new();
1132
if(mc.simple_poll == NULL){
1133
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
}
1137
1138
sigemptyset(&sigterm_action.sa_mask);
1139
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1140
if(ret == -1){
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1143
goto end;
1144
}
1145
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1146
if(ret == -1){
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1149
goto end;
1150
}
1151
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1152
if(ret == -1){
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1155
goto end;
1156
}
1157
/* Need to check if the handler is SIG_IGN before handling:
1158
| [[info:libc:Initial Signal Actions]] |
1159
| [[info:libc:Basic Signal Handling]] |
1160
*/
1161
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1162
if(ret == -1){
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1165
}
1166
if(old_sigterm_action.sa_handler != SIG_IGN){
1167
ret = sigaction(SIGINT, &sigterm_action, NULL);
1168
if(ret == -1){
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
}
1174
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1175
if(ret == -1){
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1178
}
1179
if(old_sigterm_action.sa_handler != SIG_IGN){
1180
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1181
if(ret == -1){
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1184
goto end;
1185
}
1186
}
1187
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1188
if(ret == -1){
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1191
}
1192
if(old_sigterm_action.sa_handler != SIG_IGN){
1193
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1194
if(ret == -1){
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
}
1200
1201
1015
/* If the interface is down, bring it up */
1202
1016
if(interface[0] != '\0'){
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
1204
if(if_index == 0){
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1206
exitcode = EXIT_FAILURE;
1207
goto end;
1208
}
1209
1210
if(quit_now){
1211
goto end;
1212
}
1213
1214
/* Re-raise priviliges */
1215
errno = 0;
1216
ret = seteuid(0);
1217
if(ret == -1){
1218
perror("seteuid");
1219
}
1220
1221
1017
#ifdef __linux__
1222
1018
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1223
1019
messages to mess up the prompt */
1241
1037
}
1242
1038
}
1243
1039
#endif /* __linux__ */
1244
/* Lower privileges */
1245
errno = 0;
1246
ret = seteuid(uid);
1247
if(ret == -1){
1248
perror("seteuid");
1249
}
1250
1040
goto end;
1251
1041
}
1252
1042
strcpy(network.ifr_name, interface);
1262
1052
}
1263
1053
#endif /* __linux__ */
1264
1054
exitcode = EXIT_FAILURE;
1265
/* Lower privileges */
1266
errno = 0;
1267
ret = seteuid(uid);
1268
if(ret == -1){
1269
perror("seteuid");
1270
}
1271
1055
goto end;
1272
1056
}
1273
1057
if((network.ifr_flags & IFF_UP) == 0){
1274
1058
network.ifr_flags |= IFF_UP;
1275
take_down_interface = true;
1276
1059
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1277
1060
if(ret == -1){
1278
take_down_interface = false;
1279
1061
perror("ioctl SIOCSIFFLAGS");
1280
1062
exitcode = EXIT_FAILURE;
1281
1063
#ifdef __linux__
1286
1068
}
1287
1069
}
1288
1070
#endif /* __linux__ */
1289
/* Lower privileges */
1290
errno = 0;
1291
ret = seteuid(uid);
1292
if(ret == -1){
1293
perror("seteuid");
1294
}
1295
1071
goto end;
1296
1072
}
1297
1073
}
1309
1085
perror("nanosleep");
1310
1086
}
1311
1087
}
1312
if(not take_down_interface){
1313
/* We won't need the socket anymore */
1314
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1315
if(ret == -1){
1316
perror("close");
1317
}
1088
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1089
if(ret == -1){
1090
perror("close");
1318
1091
}
1319
1092
#ifdef __linux__
1320
1093
if(restore_loglevel){
1325
1098
}
1326
1099
}
1327
1100
#endif /* __linux__ */
1328
/* Lower privileges */
1329
errno = 0;
1330
if(take_down_interface){
1331
/* Lower privileges */
1332
ret = seteuid(uid);
1333
if(ret == -1){
1334
perror("seteuid");
1335
}
1336
} else {
1337
/* Lower privileges permanently */
1338
ret = setuid(uid);
1339
if(ret == -1){
1340
perror("setuid");
1341
}
1342
}
1343
}
1344
1345
if(quit_now){
1346
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");
1347
1115
}
1348
1116
1349
1117
ret = init_gnutls_global(pubkey, seckey);
1355
1123
gnutls_initialized = true;
1356
1124
}
1357
1125
1358
if(quit_now){
1359
goto end;
1360
}
1361
1362
tempdir_created = true;
1363
1126
if(mkdtemp(tempdir) == NULL){
1364
tempdir_created = false;
1365
1127
perror("mkdtemp");
1366
1128
goto end;
1367
1129
}
1368
1369
if(quit_now){
1370
goto end;
1371
}
1130
tempdir_created = true;
1372
1131
1373
1132
if(not init_gpgme(pubkey, seckey, tempdir)){
1374
1133
fprintf(stderr, "init_gpgme failed\n");
1378
1137
gpgme_initialized = true;
1379
1138
}
1380
1139
1381
if(quit_now){
1382
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
}
1383
1147
}
1384
1148
1385
1149
if(connect_to != NULL){
1391
1155
exitcode = EXIT_FAILURE;
1392
1156
goto end;
1393
1157
}
1394
1395
if(quit_now){
1396
goto end;
1397
}
1398
1399
1158
uint16_t port;
1400
errno = 0;
1401
tmpmax = strtoimax(address+1, &tmp, 10);
1402
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1403
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'){
1404
1162
fprintf(stderr, "Bad port number\n");
1405
1163
exitcode = EXIT_FAILURE;
1406
1164
goto end;
1407
1165
}
1408
1409
if(quit_now){
1410
goto end;
1411
}
1412
1413
1166
port = (uint16_t)tmpmax;
1414
1167
*address = '\0';
1415
1168
address = connect_to;
1420
1173
} else {
1421
1174
af = AF_INET;
1422
1175
}
1423
1424
if(quit_now){
1425
goto end;
1426
}
1427
1428
1176
ret = start_mandos_communication(address, port, if_index, af);
1429
1177
if(ret < 0){
1430
1178
exitcode = EXIT_FAILURE;
1434
1182
goto end;
1435
1183
}
1436
1184
1437
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;
1438
1197
goto end;
1439
1198
}
1440
1199
1464
1223
goto end;
1465
1224
}
1466
1225
1467
if(quit_now){
1468
goto end;
1469
}
1470
1471
1226
/* Create the Avahi service browser */
1472
1227
sb = avahi_s_service_browser_new(mc.server, if_index,
1473
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1228
AVAHI_PROTO_INET6, "_mandos._tcp",
1474
1229
NULL, 0, browse_callback, NULL);
1475
1230
if(sb == NULL){
1476
1231
fprintf(stderr, "Failed to create service browser: %s\n",
1479
1234
goto end;
1480
1235
}
1481
1236
1482
if(quit_now){
1483
goto end;
1484
}
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
}
1485
1262
1486
1263
/* Run the main loop */
1487
1264
1517
1294
gpgme_release(mc.ctx);
1518
1295
}
1519
1296
1520
/* Take down the network interface */
1521
if(take_down_interface){
1522
/* Re-raise priviliges */
1523
errno = 0;
1524
ret = seteuid(0);
1525
if(ret == -1){
1526
perror("seteuid");
1527
}
1528
if(geteuid() == 0){
1529
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1530
if(ret == -1){
1531
perror("ioctl SIOCGIFFLAGS");
1532
} else if(network.ifr_flags & IFF_UP) {
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1535
if(ret == -1){
1536
perror("ioctl SIOCSIFFLAGS");
1537
}
1538
}
1539
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1540
if(ret == -1){
1541
perror("close");
1542
}
1543
/* Lower privileges permanently */
1544
errno = 0;
1545
ret = setuid(uid);
1546
if(ret == -1){
1547
perror("setuid");
1548
}
1549
}
1550
}
1551
1552
1297
/* Removes the temp directory used by GPGME */
1553
1298
if(tempdir_created){
1554
1299
DIR *d;
1593
1338
}
1594
1339
}
1595
1340
1596
if(quit_now){
1597
sigemptyset(&old_sigterm_action.sa_mask);
1598
old_sigterm_action.sa_handler = SIG_DFL;
1599
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1600
&old_sigterm_action,
1601
NULL));
1602
if(ret == -1){
1603
perror("sigaction");
1604
}
1605
do {
1606
ret = raise(signal_received);
1607
} while(ret != 0 and errno == EINTR);
1608
if(ret != 0){
1609
perror("raise");
1610
abort();
1611
}
1612
TEMP_FAILURE_RETRY(pause());
1613
}
1614
1615
1341
return exitcode;
1616
1342
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0