To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 397
- compare with another revision
- download diff
- download tarball
- view history from revision 397
- Committer: Teddy Hogeborn
- Date: 2009-10-30 16:23:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20091030162343-1p2a8bf3gc084kc9
* plugins.d/password-prompt.c: Use environment variables and prompt
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
- 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
33
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
38
#endif
35
39
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
41
40
44
#include <stdint.h> /* uint16_t, uint32_t */
41
45
#include <stddef.h> /* NULL, size_t, ssize_t */
42
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand(), strtof() */
47
srand(), strtof(), abort() */
44
48
#include <stdbool.h> /* bool, false, true */
45
49
#include <string.h> /* memset(), strcmp(), strlen(),
46
50
strerror(), asprintf(), strcpy() */
67
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
68
72
*/
69
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
72
76
#include <arpa/inet.h> /* inet_pton(), htons */
73
77
#include <iso646.h> /* not, or, and */
74
78
#include <argp.h> /* struct argp_option, error_t, struct
76
80
argp_parse(), ARGP_KEY_ARG,
77
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
82
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
80
sig_atomic_t */
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
81
86
82
87
#ifdef __linux__
83
88
#include <sys/klog.h> /* klogctl() */
138
143
.dh_bits = 1024, .priority = "SECURE256"
139
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
140
145
146
sig_atomic_t quit_now = 0;
147
int signal_received = 0;
148
141
149
/*
142
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
143
151
* bytes. "buffer_capacity" is how much is currently allocated,
160
168
*/
161
169
static bool init_gpgme(const char *seckey,
162
170
const char *pubkey, const char *tempdir){
163
int ret;
164
171
gpgme_error_t rc;
165
172
gpgme_engine_info_t engine_info;
166
173
169
176
* Helper function to insert pub and seckey to the engine keyring.
170
177
*/
171
178
bool import_key(const char *filename){
179
int ret;
172
180
int fd;
173
181
gpgme_data_t pgp_data;
174
182
245
253
return false;
246
254
}
247
255
248
return true;
256
return true;
249
257
}
250
258
251
259
/*
305
313
}
306
314
gpgme_recipient_t recipient;
307
315
recipient = result->recipients;
308
if(recipient){
309
while(recipient != NULL){
310
fprintf(stderr, "Public key algorithm: %s\n",
311
gpgme_pubkey_algo_name(recipient->pubkey_algo));
312
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
313
fprintf(stderr, "Secret key available: %s\n",
314
recipient->status == GPG_ERR_NO_SECKEY
315
? "No" : "Yes");
316
recipient = recipient->next;
317
}
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;
318
324
}
319
325
}
320
326
}
472
478
static int init_gnutls_session(gnutls_session_t *session){
473
479
int ret;
474
480
/* GnuTLS session creation */
475
ret = gnutls_init(session, GNUTLS_SERVER);
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);
476
487
if(ret != GNUTLS_E_SUCCESS){
477
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
478
489
safer_gnutls_strerror(ret));
480
491
481
492
{
482
493
const char *err;
483
ret = gnutls_priority_set_direct(*session, mc.priority, &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);
484
501
if(ret != GNUTLS_E_SUCCESS){
485
502
fprintf(stderr, "Syntax error at: %s\n", err);
486
503
fprintf(stderr, "GnuTLS error: %s\n",
490
507
}
491
508
}
492
509
493
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
494
mc.cred);
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);
495
518
if(ret != GNUTLS_E_SUCCESS){
496
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
497
520
safer_gnutls_strerror(ret));
500
523
}
501
524
502
525
/* ignore client certificate if any. */
503
gnutls_certificate_server_set_request(*session,
504
GNUTLS_CERT_IGNORE);
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
527
506
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
507
529
516
538
static int start_mandos_communication(const char *ip, uint16_t port,
517
539
AvahiIfIndex if_index,
518
540
int af){
519
int ret, tcp_sd;
541
int ret, tcp_sd = -1;
520
542
ssize_t sret;
521
543
union {
522
544
struct sockaddr_in in;
523
545
struct sockaddr_in6 in6;
524
546
} to;
525
547
char *buffer = NULL;
526
char *decrypted_buffer;
548
char *decrypted_buffer = NULL;
527
549
size_t buffer_length = 0;
528
550
size_t buffer_capacity = 0;
529
ssize_t decrypted_buffer_size;
530
551
size_t written;
531
int retval = 0;
552
int retval = -1;
532
553
gnutls_session_t session;
533
554
int pf; /* Protocol family */
534
555
556
if(quit_now){
557
return -1;
558
}
559
535
560
switch(af){
536
561
case AF_INET6:
537
562
pf = PF_INET6;
557
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
558
583
if(tcp_sd < 0){
559
584
perror("socket");
560
return -1;
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
goto mandos_end;
561
590
}
562
591
563
592
memset(&to, 0, sizeof(to));
564
593
if(af == AF_INET6){
565
to.in6.sin6_family = (uint16_t)af;
594
to.in6.sin6_family = (sa_family_t)af;
566
595
ret = inet_pton(af, ip, &to.in6.sin6_addr);
567
596
} else { /* IPv4 */
568
597
to.in.sin_family = (sa_family_t)af;
570
599
}
571
600
if(ret < 0 ){
572
601
perror("inet_pton");
573
return -1;
602
goto mandos_end;
574
603
}
575
604
if(ret == 0){
576
605
fprintf(stderr, "Bad address: %s\n", ip);
577
return -1;
606
goto mandos_end;
578
607
}
579
608
if(af == AF_INET6){
580
609
to.in6.sin6_port = htons(port); /* Spurious warnings from
587
616
if(if_index == AVAHI_IF_UNSPEC){
588
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
589
618
" without a network interface\n");
590
return -1;
619
goto mandos_end;
591
620
}
592
621
/* Set the network interface number as scope */
593
622
to.in6.sin6_scope_id = (uint32_t)if_index;
598
627
-Wunreachable-code */
599
628
}
600
629
630
if(quit_now){
631
goto mandos_end;
632
}
633
601
634
if(debug){
602
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
603
636
char interface[IF_NAMESIZE];
630
663
}
631
664
}
632
665
666
if(quit_now){
667
goto mandos_end;
668
}
669
633
670
if(af == AF_INET6){
634
671
ret = connect(tcp_sd, &to.in6, sizeof(to));
635
672
} else {
637
674
}
638
675
if(ret < 0){
639
676
perror("connect");
640
return -1;
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
641
682
}
642
683
643
684
const char *out = mandos_protocol_version;
648
689
out_size - written));
649
690
if(ret == -1){
650
691
perror("write");
651
retval = -1;
652
692
goto mandos_end;
653
693
}
654
694
written += (size_t)ret;
662
702
break;
663
703
}
664
704
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
665
709
}
666
710
667
711
if(debug){
668
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
669
713
}
670
714
715
if(quit_now){
716
goto mandos_end;
717
}
718
671
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
672
720
673
do{
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
674
726
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
675
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
676
731
677
732
if(ret != GNUTLS_E_SUCCESS){
679
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
680
735
gnutls_perror(ret);
681
736
}
682
retval = -1;
683
737
goto mandos_end;
684
738
}
685
739
691
745
}
692
746
693
747
while(true){
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
694
753
buffer_capacity = incbuffer(&buffer, buffer_length,
695
754
buffer_capacity);
696
755
if(buffer_capacity == 0){
697
756
perror("incbuffer");
698
retval = -1;
757
goto mandos_end;
758
}
759
760
if(quit_now){
699
761
goto mandos_end;
700
762
}
701
763
710
772
case GNUTLS_E_AGAIN:
711
773
break;
712
774
case GNUTLS_E_REHANDSHAKE:
713
do{
775
do {
714
776
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
715
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
716
782
if(ret < 0){
717
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
718
784
gnutls_perror(ret);
719
retval = -1;
720
785
goto mandos_end;
721
786
}
722
787
break;
723
788
default:
724
789
fprintf(stderr, "Unknown error while reading data from"
725
790
" encrypted session with Mandos server\n");
726
retval = -1;
727
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
728
792
goto mandos_end;
729
793
}
736
800
fprintf(stderr, "Closing TLS session\n");
737
801
}
738
802
739
gnutls_bye(session, GNUTLS_SHUT_RDWR);
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);
740
813
741
814
if(buffer_length > 0){
815
ssize_t decrypted_buffer_size;
742
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
743
817
buffer_length,
744
818
&decrypted_buffer);
745
819
if(decrypted_buffer_size >= 0){
820
746
821
written = 0;
747
822
while(written < (size_t) decrypted_buffer_size){
823
if(quit_now){
824
goto mandos_end;
825
}
826
748
827
ret = (int)fwrite(decrypted_buffer + written, 1,
749
828
(size_t)decrypted_buffer_size - written,
750
829
stdout);
753
832
fprintf(stderr, "Error writing encrypted data: %s\n",
754
833
strerror(errno));
755
834
}
756
retval = -1;
757
break;
835
goto mandos_end;
758
836
}
759
837
written += (size_t)ret;
760
838
}
761
free(decrypted_buffer);
762
} else {
763
retval = -1;
839
retval = 0;
764
840
}
765
} else {
766
retval = -1;
767
841
}
768
842
769
843
/* Shutdown procedure */
770
844
771
845
mandos_end:
846
free(decrypted_buffer);
772
847
free(buffer);
773
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
774
851
if(ret == -1){
775
852
perror("close");
776
853
}
777
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
778
858
return retval;
779
859
}
780
860
797
877
/* Called whenever a service has been resolved successfully or
798
878
timed out */
799
879
880
if(quit_now){
881
return;
882
}
883
800
884
switch(event){
801
885
default:
802
886
case AVAHI_RESOLVER_FAILURE:
839
923
/* Called whenever a new services becomes available on the LAN or
840
924
is removed from the LAN */
841
925
926
if(quit_now){
927
return;
928
}
929
842
930
switch(event){
843
931
default:
844
932
case AVAHI_BROWSER_FAILURE:
854
942
the callback function is called the Avahi server will free the
855
943
resolver for us. */
856
944
857
if(!(avahi_s_service_resolver_new(mc.server, interface,
858
protocol, name, type, domain,
859
AVAHI_PROTO_INET6, 0,
860
resolve_callback, NULL)))
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
861
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
862
949
name, avahi_strerror(avahi_server_errno(mc.server)));
863
950
break;
874
961
}
875
962
}
876
963
877
sig_atomic_t quit_now = 0;
878
879
964
/* stop main loop after sigterm has been called */
880
static void handle_sigterm(__attribute__((unused)) int sig){
965
static void handle_sigterm(int sig){
881
966
if(quit_now){
882
967
return;
883
968
}
884
969
quit_now = 1;
970
signal_received = sig;
885
971
int old_errno = errno;
886
972
if(mc.simple_poll != NULL){
887
973
avahi_simple_poll_quit(mc.simple_poll);
898
984
int exitcode = EXIT_SUCCESS;
899
985
const char *interface = "eth0";
900
986
struct ifreq network;
901
int sd;
987
int sd = -1;
988
bool take_down_interface = false;
902
989
uid_t uid;
903
990
gid_t gid;
904
991
char *connect_to = NULL;
908
995
const char *seckey = PATHDIR "/" SECKEY;
909
996
const char *pubkey = PATHDIR "/" PUBKEY;
910
997
911
/* Initialize Mandos context */
912
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
913
.dh_bits = 1024, .priority = "SECURE256"
914
":!CTYPE-X.509:+CTYPE-OPENPGP" };
915
998
bool gnutls_initialized = false;
916
999
bool gpgme_initialized = false;
917
1000
float delay = 2.5f;
918
1001
919
struct sigaction old_sigterm_action;
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
920
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
921
1004
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
922
1026
{
923
1027
struct argp_option options[] = {
924
1028
{ .name = "debug", .key = 128,
953
1057
.arg = "SECONDS",
954
1058
.doc = "Maximum delay to wait for interface startup",
955
1059
.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 },
956
1069
{ .name = NULL }
957
1070
};
958
1071
959
1072
error_t parse_opt(int key, char *arg,
960
1073
struct argp_state *state){
1074
errno = 0;
961
1075
switch(key){
962
1076
case 128: /* --debug */
963
1077
debug = true;
979
1093
tmpmax = strtoimax(arg, &tmp, 10);
980
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
981
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
982
fprintf(stderr, "Bad number of DH bits\n");
983
exit(EXIT_FAILURE);
1096
argp_error(state, "Bad number of DH bits");
984
1097
}
985
1098
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
986
1099
break;
991
1104
errno = 0;
992
1105
delay = strtof(arg, &tmp);
993
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
994
fprintf(stderr, "Bad delay\n");
995
exit(EXIT_FAILURE);
1107
argp_error(state, "Bad delay");
996
1108
}
997
1109
break;
998
case ARGP_KEY_ARG:
999
argp_usage(state);
1000
case ARGP_KEY_END:
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);
1001
1123
break;
1002
1124
default:
1003
1125
return ARGP_ERR_UNKNOWN;
1004
1126
}
1005
return 0;
1127
return errno;
1006
1128
}
1007
1129
1008
1130
struct argp argp = { .options = options, .parser = parse_opt,
1009
1131
.args_doc = "",
1010
1132
.doc = "Mandos client -- Get and decrypt"
1011
1133
" passwords from a Mandos server" };
1012
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1013
if(ret == ARGP_ERR_UNKNOWN){
1014
fprintf(stderr, "Unknown error while parsing arguments\n");
1015
exitcode = EXIT_FAILURE;
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;
1016
1147
goto end;
1017
1148
}
1018
1149
}
1051
1182
exitcode = EXIT_FAILURE;
1052
1183
goto end;
1053
1184
}
1054
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1055
if(ret == -1){
1056
perror("sigaction");
1057
exitcode = EXIT_FAILURE;
1058
goto end;
1059
}
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
}
1060
1228
1061
1229
/* If the interface is down, bring it up */
1062
1230
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
1063
1249
#ifdef __linux__
1064
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1065
messages to mess up the prompt */
1251
messages about the network interface to mess up the prompt */
1066
1252
ret = klogctl(8, NULL, 5);
1067
1253
bool restore_loglevel = true;
1068
1254
if(ret == -1){
1083
1269
}
1084
1270
}
1085
1271
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
1275
if(ret == -1){
1276
perror("seteuid");
1277
}
1086
1278
goto end;
1087
1279
}
1088
1280
strcpy(network.ifr_name, interface);
1098
1290
}
1099
1291
#endif /* __linux__ */
1100
1292
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1101
1299
goto end;
1102
1300
}
1103
1301
if((network.ifr_flags & IFF_UP) == 0){
1104
1302
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1105
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1106
1305
if(ret == -1){
1306
take_down_interface = false;
1107
1307
perror("ioctl SIOCSIFFLAGS");
1108
1308
exitcode = EXIT_FAILURE;
1109
1309
#ifdef __linux__
1114
1314
}
1115
1315
}
1116
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
1320
if(ret == -1){
1321
perror("seteuid");
1322
}
1117
1323
goto end;
1118
1324
}
1119
1325
}
1131
1337
perror("nanosleep");
1132
1338
}
1133
1339
}
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1135
if(ret == -1){
1136
perror("close");
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
}
1137
1346
}
1138
1347
#ifdef __linux__
1139
1348
if(restore_loglevel){
1144
1353
}
1145
1354
}
1146
1355
#endif /* __linux__ */
1147
}
1148
1149
uid = getuid();
1150
gid = getgid();
1151
1152
errno = 0;
1153
setgid(gid);
1154
if(ret == -1){
1155
perror("setgid");
1156
}
1157
1158
ret = setuid(uid);
1159
if(ret == -1){
1160
perror("setuid");
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;
1161
1375
}
1162
1376
1163
1377
ret = init_gnutls_global(pubkey, seckey);
1169
1383
gnutls_initialized = true;
1170
1384
}
1171
1385
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1172
1391
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1173
1393
perror("mkdtemp");
1174
1394
goto end;
1175
1395
}
1176
tempdir_created = true;
1396
1397
if(quit_now){
1398
goto end;
1399
}
1177
1400
1178
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1179
1402
fprintf(stderr, "init_gpgme failed\n");
1183
1406
gpgme_initialized = true;
1184
1407
}
1185
1408
1186
if(interface[0] != '\0'){
1187
if_index = (AvahiIfIndex) if_nametoindex(interface);
1188
if(if_index == 0){
1189
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1190
exitcode = EXIT_FAILURE;
1191
goto end;
1192
}
1409
if(quit_now){
1410
goto end;
1193
1411
}
1194
1412
1195
1413
if(connect_to != NULL){
1201
1419
exitcode = EXIT_FAILURE;
1202
1420
goto end;
1203
1421
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1204
1427
uint16_t port;
1205
1428
errno = 0;
1206
1429
tmpmax = strtoimax(address+1, &tmp, 10);
1210
1433
exitcode = EXIT_FAILURE;
1211
1434
goto end;
1212
1435
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1213
1441
port = (uint16_t)tmpmax;
1214
1442
*address = '\0';
1215
1443
address = connect_to;
1220
1448
} else {
1221
1449
af = AF_INET;
1222
1450
}
1451
1452
if(quit_now){
1453
goto end;
1454
}
1455
1223
1456
ret = start_mandos_communication(address, port, if_index, af);
1224
1457
if(ret < 0){
1225
1458
exitcode = EXIT_FAILURE;
1228
1461
}
1229
1462
goto end;
1230
1463
}
1231
1464
1465
if(quit_now){
1466
goto end;
1467
}
1468
1232
1469
{
1233
1470
AvahiServerConfig config;
1234
1471
/* Do not publish any local Zeroconf records */
1255
1492
goto end;
1256
1493
}
1257
1494
1495
if(quit_now){
1496
goto end;
1497
}
1498
1258
1499
/* Create the Avahi service browser */
1259
1500
sb = avahi_s_service_browser_new(mc.server, if_index,
1260
AVAHI_PROTO_INET6, "_mandos._tcp",
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1261
1502
NULL, 0, browse_callback, NULL);
1262
1503
if(sb == NULL){
1263
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1266
1507
goto end;
1267
1508
}
1268
1509
1510
if(quit_now){
1511
goto end;
1512
}
1513
1269
1514
/* Run the main loop */
1270
1515
1271
1516
if(debug){
1300
1545
gpgme_release(mc.ctx);
1301
1546
}
1302
1547
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
1303
1580
/* Removes the temp directory used by GPGME */
1304
1581
if(tempdir_created){
1305
1582
DIR *d;
1344
1621
}
1345
1622
}
1346
1623
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
1347
1643
return exitcode;
1348
1644
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0