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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() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
86
81
87
82
#ifdef __linux__
88
83
#include <sys/klog.h> /* klogctl() */
139
134
} mandos_context;
140
135
141
136
/* global context so signal handler can reach it*/
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
143
.dh_bits = 1024, .priority = "SECURE256"
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
145
146
sig_atomic_t quit_now = 0;
147
int signal_received = 0;
137
mandos_context mc;
148
138
149
139
/*
150
140
* Make additional room in "buffer" for at least BUFFER_SIZE more
168
158
*/
169
159
static bool init_gpgme(const char *seckey,
170
160
const char *pubkey, const char *tempdir){
161
int ret;
171
162
gpgme_error_t rc;
172
163
gpgme_engine_info_t engine_info;
173
164
176
167
* Helper function to insert pub and seckey to the engine keyring.
177
168
*/
178
169
bool import_key(const char *filename){
179
int ret;
180
170
int fd;
181
171
gpgme_data_t pgp_data;
182
172
253
243
return false;
254
244
}
255
245
256
return true;
246
return true;
257
247
}
258
248
259
249
/*
313
303
}
314
304
gpgme_recipient_t recipient;
315
305
recipient = result->recipients;
316
while(recipient != NULL){
317
fprintf(stderr, "Public key algorithm: %s\n",
318
gpgme_pubkey_algo_name(recipient->pubkey_algo));
319
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
320
fprintf(stderr, "Secret key available: %s\n",
321
recipient->status == GPG_ERR_NO_SECKEY
322
? "No" : "Yes");
323
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
}
324
316
}
325
317
}
326
318
}
478
470
static int init_gnutls_session(gnutls_session_t *session){
479
471
int ret;
480
472
/* GnuTLS session creation */
481
do {
482
ret = gnutls_init(session, GNUTLS_SERVER);
483
if(quit_now){
484
return -1;
485
}
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
473
ret = gnutls_init(session, GNUTLS_SERVER);
487
474
if(ret != GNUTLS_E_SUCCESS){
488
475
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
476
safer_gnutls_strerror(ret));
491
478
492
479
{
493
480
const char *err;
494
do {
495
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
496
if(quit_now){
497
gnutls_deinit(*session);
498
return -1;
499
}
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
481
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
501
482
if(ret != GNUTLS_E_SUCCESS){
502
483
fprintf(stderr, "Syntax error at: %s\n", err);
503
484
fprintf(stderr, "GnuTLS error: %s\n",
507
488
}
508
489
}
509
490
510
do {
511
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
512
mc.cred);
513
if(quit_now){
514
gnutls_deinit(*session);
515
return -1;
516
}
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
491
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
492
mc.cred);
518
493
if(ret != GNUTLS_E_SUCCESS){
519
494
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
520
495
safer_gnutls_strerror(ret));
523
498
}
524
499
525
500
/* ignore client certificate if any. */
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
501
gnutls_certificate_server_set_request(*session,
502
GNUTLS_CERT_IGNORE);
527
503
528
504
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
529
505
538
514
static int start_mandos_communication(const char *ip, uint16_t port,
539
515
AvahiIfIndex if_index,
540
516
int af){
541
int ret, tcp_sd = -1;
517
int ret, tcp_sd;
542
518
ssize_t sret;
543
519
union {
544
520
struct sockaddr_in in;
545
521
struct sockaddr_in6 in6;
546
522
} to;
547
523
char *buffer = NULL;
548
char *decrypted_buffer = NULL;
524
char *decrypted_buffer;
549
525
size_t buffer_length = 0;
550
526
size_t buffer_capacity = 0;
527
ssize_t decrypted_buffer_size;
551
528
size_t written;
552
int retval = -1;
529
int retval = 0;
553
530
gnutls_session_t session;
554
531
int pf; /* Protocol family */
555
532
556
if(quit_now){
557
return -1;
558
}
559
560
533
switch(af){
561
534
case AF_INET6:
562
535
pf = PF_INET6;
582
555
tcp_sd = socket(pf, SOCK_STREAM, 0);
583
556
if(tcp_sd < 0){
584
557
perror("socket");
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
goto mandos_end;
558
return -1;
590
559
}
591
560
592
561
memset(&to, 0, sizeof(to));
593
562
if(af == AF_INET6){
594
to.in6.sin6_family = (sa_family_t)af;
563
to.in6.sin6_family = (uint16_t)af;
595
564
ret = inet_pton(af, ip, &to.in6.sin6_addr);
596
565
} else { /* IPv4 */
597
566
to.in.sin_family = (sa_family_t)af;
599
568
}
600
569
if(ret < 0 ){
601
570
perror("inet_pton");
602
goto mandos_end;
571
return -1;
603
572
}
604
573
if(ret == 0){
605
574
fprintf(stderr, "Bad address: %s\n", ip);
606
goto mandos_end;
575
return -1;
607
576
}
608
577
if(af == AF_INET6){
609
578
to.in6.sin6_port = htons(port); /* Spurious warnings from
616
585
if(if_index == AVAHI_IF_UNSPEC){
617
586
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
587
" without a network interface\n");
619
goto mandos_end;
588
return -1;
620
589
}
621
590
/* Set the network interface number as scope */
622
591
to.in6.sin6_scope_id = (uint32_t)if_index;
627
596
-Wunreachable-code */
628
597
}
629
598
630
if(quit_now){
631
goto mandos_end;
632
}
633
634
599
if(debug){
635
600
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
636
601
char interface[IF_NAMESIZE];
663
628
}
664
629
}
665
630
666
if(quit_now){
667
goto mandos_end;
668
}
669
670
631
if(af == AF_INET6){
671
632
ret = connect(tcp_sd, &to.in6, sizeof(to));
672
633
} else {
674
635
}
675
636
if(ret < 0){
676
637
perror("connect");
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
638
return -1;
682
639
}
683
640
684
641
const char *out = mandos_protocol_version;
689
646
out_size - written));
690
647
if(ret == -1){
691
648
perror("write");
649
retval = -1;
692
650
goto mandos_end;
693
651
}
694
652
written += (size_t)ret;
702
660
break;
703
661
}
704
662
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
709
663
}
710
664
711
665
if(debug){
712
666
fprintf(stderr, "Establishing TLS session with %s\n", ip);
713
667
}
714
668
715
if(quit_now){
716
goto mandos_end;
717
}
718
719
669
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
720
670
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
671
do{
726
672
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
730
673
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
731
674
732
675
if(ret != GNUTLS_E_SUCCESS){
734
677
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
735
678
gnutls_perror(ret);
736
679
}
680
retval = -1;
737
681
goto mandos_end;
738
682
}
739
683
745
689
}
746
690
747
691
while(true){
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
753
692
buffer_capacity = incbuffer(&buffer, buffer_length,
754
693
buffer_capacity);
755
694
if(buffer_capacity == 0){
756
695
perror("incbuffer");
757
goto mandos_end;
758
}
759
760
if(quit_now){
696
retval = -1;
761
697
goto mandos_end;
762
698
}
763
699
772
708
case GNUTLS_E_AGAIN:
773
709
break;
774
710
case GNUTLS_E_REHANDSHAKE:
775
do {
711
do{
776
712
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
781
713
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
782
714
if(ret < 0){
783
715
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
784
716
gnutls_perror(ret);
717
retval = -1;
785
718
goto mandos_end;
786
719
}
787
720
break;
788
721
default:
789
722
fprintf(stderr, "Unknown error while reading data from"
790
723
" encrypted session with Mandos server\n");
724
retval = -1;
791
725
gnutls_bye(session, GNUTLS_SHUT_RDWR);
792
726
goto mandos_end;
793
727
}
800
734
fprintf(stderr, "Closing TLS session\n");
801
735
}
802
736
803
if(quit_now){
804
goto mandos_end;
805
}
806
807
do {
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
809
if(quit_now){
810
goto mandos_end;
811
}
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
737
gnutls_bye(session, GNUTLS_SHUT_RDWR);
813
738
814
739
if(buffer_length > 0){
815
ssize_t decrypted_buffer_size;
816
740
decrypted_buffer_size = pgp_packet_decrypt(buffer,
817
741
buffer_length,
818
742
&decrypted_buffer);
819
743
if(decrypted_buffer_size >= 0){
820
821
744
written = 0;
822
745
while(written < (size_t) decrypted_buffer_size){
823
if(quit_now){
824
goto mandos_end;
825
}
826
827
746
ret = (int)fwrite(decrypted_buffer + written, 1,
828
747
(size_t)decrypted_buffer_size - written,
829
748
stdout);
832
751
fprintf(stderr, "Error writing encrypted data: %s\n",
833
752
strerror(errno));
834
753
}
835
goto mandos_end;
754
retval = -1;
755
break;
836
756
}
837
757
written += (size_t)ret;
838
758
}
839
retval = 0;
759
free(decrypted_buffer);
760
} else {
761
retval = -1;
840
762
}
763
} else {
764
retval = -1;
841
765
}
842
766
843
767
/* Shutdown procedure */
844
768
845
769
mandos_end:
846
free(decrypted_buffer);
847
770
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
771
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
851
772
if(ret == -1){
852
773
perror("close");
853
774
}
854
775
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
858
776
return retval;
859
777
}
860
778
877
795
/* Called whenever a service has been resolved successfully or
878
796
timed out */
879
797
880
if(quit_now){
881
return;
882
}
883
884
798
switch(event){
885
799
default:
886
800
case AVAHI_RESOLVER_FAILURE:
923
837
/* Called whenever a new services becomes available on the LAN or
924
838
is removed from the LAN */
925
839
926
if(quit_now){
927
return;
928
}
929
930
840
switch(event){
931
841
default:
932
842
case AVAHI_BROWSER_FAILURE:
942
852
the callback function is called the Avahi server will free the
943
853
resolver for us. */
944
854
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
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)))
948
859
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
860
name, avahi_strerror(avahi_server_errno(mc.server)));
950
861
break;
961
872
}
962
873
}
963
874
964
/* stop main loop after sigterm has been called */
965
static void handle_sigterm(int sig){
875
sig_atomic_t quit_now = 0;
876
877
static void handle_sigterm(__attribute__((unused)) int sig){
966
878
if(quit_now){
967
879
return;
968
880
}
969
881
quit_now = 1;
970
signal_received = sig;
971
882
int old_errno = errno;
972
883
if(mc.simple_poll != NULL){
973
884
avahi_simple_poll_quit(mc.simple_poll);
980
891
int error;
981
892
int ret;
982
893
intmax_t tmpmax;
983
char *tmp;
894
int numchars;
984
895
int exitcode = EXIT_SUCCESS;
985
896
const char *interface = "eth0";
986
897
struct ifreq network;
987
int sd = -1;
988
bool take_down_interface = false;
898
int sd;
989
899
uid_t uid;
990
900
gid_t gid;
991
901
char *connect_to = NULL;
995
905
const char *seckey = PATHDIR "/" SECKEY;
996
906
const char *pubkey = PATHDIR "/" PUBKEY;
997
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" };
998
912
bool gnutls_initialized = false;
999
913
bool gpgme_initialized = false;
1000
float delay = 2.5f;
1001
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
914
double delay = 2.5;
915
916
struct sigaction old_sigterm_action;
1003
917
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1004
918
1005
uid = getuid();
1006
gid = getgid();
1007
1008
/* Lower any group privileges we might have, just to be safe */
1009
errno = 0;
1010
ret = setgid(gid);
1011
if(ret == -1){
1012
perror("setgid");
1013
}
1014
1015
/* Lower user privileges (temporarily) */
1016
errno = 0;
1017
ret = seteuid(uid);
1018
if(ret == -1){
1019
perror("seteuid");
1020
}
1021
1022
if(quit_now){
1023
goto end;
1024
}
1025
1026
919
{
1027
920
struct argp_option options[] = {
1028
921
{ .name = "debug", .key = 128,
1057
950
.arg = "SECONDS",
1058
951
.doc = "Maximum delay to wait for interface startup",
1059
952
.group = 2 },
1060
/*
1061
* These reproduce what we would get without ARGP_NO_HELP
1062
*/
1063
{ .name = "help", .key = '?',
1064
.doc = "Give this help list", .group = -1 },
1065
{ .name = "usage", .key = -3,
1066
.doc = "Give a short usage message", .group = -1 },
1067
{ .name = "version", .key = 'V',
1068
.doc = "Print program version", .group = -1 },
1069
953
{ .name = NULL }
1070
954
};
1071
955
1072
956
error_t parse_opt(int key, char *arg,
1073
957
struct argp_state *state){
1074
errno = 0;
1075
958
switch(key){
1076
959
case 128: /* --debug */
1077
960
debug = true;
1089
972
pubkey = arg;
1090
973
break;
1091
974
case 129: /* --dh-bits */
1092
errno = 0;
1093
tmpmax = strtoimax(arg, &tmp, 10);
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1096
argp_error(state, "Bad number of DH bits");
975
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
976
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
977
or arg[numchars] != '\0'){
978
fprintf(stderr, "Bad number of DH bits\n");
979
exit(EXIT_FAILURE);
1097
980
}
1098
981
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1099
982
break;
1101
984
mc.priority = arg;
1102
985
break;
1103
986
case 131: /* --delay */
1104
errno = 0;
1105
delay = strtof(arg, &tmp);
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
argp_error(state, "Bad delay");
987
ret = sscanf(arg, "%lf%n", &delay, &numchars);
988
if(ret < 1 or arg[numchars] != '\0'){
989
fprintf(stderr, "Bad delay\n");
990
exit(EXIT_FAILURE);
1108
991
}
1109
992
break;
1110
/*
1111
* These reproduce what we would get without ARGP_NO_HELP
1112
*/
1113
case '?': /* --help */
1114
argp_state_help(state, state->out_stream,
1115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1117
case -3: /* --usage */
1118
argp_state_help(state, state->out_stream,
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1122
exit(argp_err_exit_status);
993
case ARGP_KEY_ARG:
994
argp_usage(state);
995
case ARGP_KEY_END:
1123
996
break;
1124
997
default:
1125
998
return ARGP_ERR_UNKNOWN;
1126
999
}
1127
return errno;
1000
return 0;
1128
1001
}
1129
1002
1130
1003
struct argp argp = { .options = options, .parser = parse_opt,
1131
1004
.args_doc = "",
1132
1005
.doc = "Mandos client -- Get and decrypt"
1133
1006
" passwords from a Mandos server" };
1134
ret = argp_parse(&argp, argc, argv,
1135
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1136
switch(ret){
1137
case 0:
1138
break;
1139
case ENOMEM:
1140
default:
1141
errno = ret;
1142
perror("argp_parse");
1143
exitcode = EX_OSERR;
1144
goto end;
1145
case EINVAL:
1146
exitcode = EX_USAGE;
1147
goto end;
1148
}
1149
}
1150
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");
1007
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1008
if(ret == ARGP_ERR_UNKNOWN){
1009
fprintf(stderr, "Unknown error while parsing arguments\n");
1224
1010
exitcode = EXIT_FAILURE;
1225
1011
goto end;
1226
1012
}
1228
1014
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
messages about the network interface to mess up the prompt */
1019
messages to mess up the prompt */
1252
1020
ret = klogctl(8, NULL, 5);
1253
1021
bool restore_loglevel = true;
1254
1022
if(ret == -1){
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 &= ~(short)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 = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1628
&old_sigterm_action,
1629
NULL));
1630
if(ret == -1){
1631
perror("sigaction");
1632
}
1633
do {
1634
ret = raise(signal_received);
1635
} while(ret != 0 and errno == EINTR);
1636
if(ret != 0){
1637
perror("raise");
1638
abort();
1639
}
1640
TEMP_FAILURE_RETRY(pause());
1641
}
1642
1643
1341
return exitcode;
1644
1342
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0