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- Committer: Teddy Hogeborn
- Date: 2009-07-12 20:15:29 UTC
- Revision ID: teddy@fukt.bsnet.se-20090712201529-mtsc3hjyfm5wlk1r
* mandos (ClientHandler.handle): Also pass client address in
"NOTFOUND" message.
"NOTFOUND" message.
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time(), sleep() */
66
#include <time.h> /* nanosleep(), time() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
71
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
74
getuid(), getgid(), setuid(),
75
setgid() */
76
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
80
80
argp_parse(), ARGP_KEY_ARG,
81
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
83
sigaction(), SIGTERM, sigaction,
84
sig_atomic_t */
87
85
88
86
#ifdef __linux__
89
87
#include <sys/klog.h> /* klogctl() */
127
125
static const char mandos_protocol_version[] = "1";
128
126
const char *argp_program_version = "mandos-client " VERSION;
129
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
static const char sys_class_net[] = "/sys/class/net";
131
char *connect_to = NULL;
132
128
133
129
/* Used for passing in values through the Avahi callback functions */
134
130
typedef struct {
146
142
.dh_bits = 1024, .priority = "SECURE256"
147
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
148
144
149
sig_atomic_t quit_now = 0;
150
int signal_received = 0;
151
152
145
/*
153
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
147
* bytes. "buffer_capacity" is how much is currently allocated,
171
164
*/
172
165
static bool init_gpgme(const char *seckey,
173
166
const char *pubkey, const char *tempdir){
167
int ret;
174
168
gpgme_error_t rc;
175
169
gpgme_engine_info_t engine_info;
176
170
179
173
* Helper function to insert pub and seckey to the engine keyring.
180
174
*/
181
175
bool import_key(const char *filename){
182
int ret;
183
176
int fd;
184
177
gpgme_data_t pgp_data;
185
178
256
249
return false;
257
250
}
258
251
259
return true;
252
return true;
260
253
}
261
254
262
255
/*
481
474
static int init_gnutls_session(gnutls_session_t *session){
482
475
int ret;
483
476
/* GnuTLS session creation */
484
do {
485
ret = gnutls_init(session, GNUTLS_SERVER);
486
if(quit_now){
487
return -1;
488
}
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_init(session, GNUTLS_SERVER);
490
478
if(ret != GNUTLS_E_SUCCESS){
491
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
480
safer_gnutls_strerror(ret));
494
482
495
483
{
496
484
const char *err;
497
do {
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
499
if(quit_now){
500
gnutls_deinit(*session);
501
return -1;
502
}
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
504
486
if(ret != GNUTLS_E_SUCCESS){
505
487
fprintf(stderr, "Syntax error at: %s\n", err);
506
488
fprintf(stderr, "GnuTLS error: %s\n",
510
492
}
511
493
}
512
494
513
do {
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
515
mc.cred);
516
if(quit_now){
517
gnutls_deinit(*session);
518
return -1;
519
}
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
521
497
if(ret != GNUTLS_E_SUCCESS){
522
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
499
safer_gnutls_strerror(ret));
526
502
}
527
503
528
504
/* ignore client certificate if any. */
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
530
507
531
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
532
509
541
518
static int start_mandos_communication(const char *ip, uint16_t port,
542
519
AvahiIfIndex if_index,
543
520
int af){
544
int ret, tcp_sd = -1;
521
int ret, tcp_sd;
545
522
ssize_t sret;
546
523
union {
547
524
struct sockaddr_in in;
548
525
struct sockaddr_in6 in6;
549
526
} to;
550
527
char *buffer = NULL;
551
char *decrypted_buffer = NULL;
528
char *decrypted_buffer;
552
529
size_t buffer_length = 0;
553
530
size_t buffer_capacity = 0;
531
ssize_t decrypted_buffer_size;
554
532
size_t written;
555
int retval = -1;
533
int retval = 0;
556
534
gnutls_session_t session;
557
535
int pf; /* Protocol family */
558
536
559
errno = 0;
560
561
if(quit_now){
562
errno = EINTR;
563
return -1;
564
}
565
566
537
switch(af){
567
538
case AF_INET6:
568
539
pf = PF_INET6;
572
543
break;
573
544
default:
574
545
fprintf(stderr, "Bad address family: %d\n", af);
575
errno = EINVAL;
576
546
return -1;
577
547
}
578
548
588
558
589
559
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
560
if(tcp_sd < 0){
591
int e = errno;
592
561
perror("socket");
593
errno = e;
594
goto mandos_end;
595
}
596
597
if(quit_now){
598
errno = EINTR;
599
goto mandos_end;
562
return -1;
600
563
}
601
564
602
565
memset(&to, 0, sizeof(to));
608
571
ret = inet_pton(af, ip, &to.in.sin_addr);
609
572
}
610
573
if(ret < 0 ){
611
int e = errno;
612
574
perror("inet_pton");
613
errno = e;
614
goto mandos_end;
575
return -1;
615
576
}
616
577
if(ret == 0){
617
int e = errno;
618
578
fprintf(stderr, "Bad address: %s\n", ip);
619
errno = e;
620
goto mandos_end;
579
return -1;
621
580
}
622
581
if(af == AF_INET6){
623
582
to.in6.sin6_port = htons(port); /* Spurious warnings from
630
589
if(if_index == AVAHI_IF_UNSPEC){
631
590
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
591
" without a network interface\n");
633
errno = EINVAL;
634
goto mandos_end;
592
return -1;
635
593
}
636
594
/* Set the network interface number as scope */
637
595
to.in6.sin6_scope_id = (uint32_t)if_index;
642
600
-Wunreachable-code */
643
601
}
644
602
645
if(quit_now){
646
errno = EINTR;
647
goto mandos_end;
648
}
649
650
603
if(debug){
651
604
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
652
605
char interface[IF_NAMESIZE];
679
632
}
680
633
}
681
634
682
if(quit_now){
683
errno = EINTR;
684
goto mandos_end;
685
}
686
687
635
if(af == AF_INET6){
688
636
ret = connect(tcp_sd, &to.in6, sizeof(to));
689
637
} else {
690
638
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
691
639
}
692
640
if(ret < 0){
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
int e = errno;
695
perror("connect");
696
errno = e;
697
}
698
goto mandos_end;
699
}
700
701
if(quit_now){
702
errno = EINTR;
703
goto mandos_end;
641
perror("connect");
642
return -1;
704
643
}
705
644
706
645
const char *out = mandos_protocol_version;
710
649
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
711
650
out_size - written));
712
651
if(ret == -1){
713
int e = errno;
714
652
perror("write");
715
errno = e;
653
retval = -1;
716
654
goto mandos_end;
717
655
}
718
656
written += (size_t)ret;
726
664
break;
727
665
}
728
666
}
729
730
if(quit_now){
731
errno = EINTR;
732
goto mandos_end;
733
}
734
667
}
735
668
736
669
if(debug){
737
670
fprintf(stderr, "Establishing TLS session with %s\n", ip);
738
671
}
739
672
740
if(quit_now){
741
errno = EINTR;
742
goto mandos_end;
743
}
744
745
/* Spurious warnings from -Wint-to-pointer-cast */
746
673
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
747
674
748
if(quit_now){
749
errno = EINTR;
750
goto mandos_end;
751
}
752
753
do {
675
do{
754
676
ret = gnutls_handshake(session);
755
if(quit_now){
756
errno = EINTR;
757
goto mandos_end;
758
}
759
677
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
760
678
761
679
if(ret != GNUTLS_E_SUCCESS){
763
681
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
764
682
gnutls_perror(ret);
765
683
}
766
errno = EPROTO;
684
retval = -1;
767
685
goto mandos_end;
768
686
}
769
687
775
693
}
776
694
777
695
while(true){
778
779
if(quit_now){
780
errno = EINTR;
781
goto mandos_end;
782
}
783
784
696
buffer_capacity = incbuffer(&buffer, buffer_length,
785
697
buffer_capacity);
786
698
if(buffer_capacity == 0){
787
int e = errno;
788
699
perror("incbuffer");
789
errno = e;
790
goto mandos_end;
791
}
792
793
if(quit_now){
794
errno = EINTR;
700
retval = -1;
795
701
goto mandos_end;
796
702
}
797
703
806
712
case GNUTLS_E_AGAIN:
807
713
break;
808
714
case GNUTLS_E_REHANDSHAKE:
809
do {
715
do{
810
716
ret = gnutls_handshake(session);
811
812
if(quit_now){
813
errno = EINTR;
814
goto mandos_end;
815
}
816
717
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
817
718
if(ret < 0){
818
719
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
819
720
gnutls_perror(ret);
820
errno = EPROTO;
721
retval = -1;
821
722
goto mandos_end;
822
723
}
823
724
break;
824
725
default:
825
726
fprintf(stderr, "Unknown error while reading data from"
826
727
" encrypted session with Mandos server\n");
728
retval = -1;
827
729
gnutls_bye(session, GNUTLS_SHUT_RDWR);
828
errno = EIO;
829
730
goto mandos_end;
830
731
}
831
732
} else {
837
738
fprintf(stderr, "Closing TLS session\n");
838
739
}
839
740
840
if(quit_now){
841
errno = EINTR;
842
goto mandos_end;
843
}
844
845
do {
846
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
847
if(quit_now){
848
errno = EINTR;
849
goto mandos_end;
850
}
851
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
741
gnutls_bye(session, GNUTLS_SHUT_RDWR);
852
742
853
743
if(buffer_length > 0){
854
ssize_t decrypted_buffer_size;
855
744
decrypted_buffer_size = pgp_packet_decrypt(buffer,
856
745
buffer_length,
857
746
&decrypted_buffer);
858
747
if(decrypted_buffer_size >= 0){
859
860
748
written = 0;
861
749
while(written < (size_t) decrypted_buffer_size){
862
if(quit_now){
863
errno = EINTR;
864
goto mandos_end;
865
}
866
867
750
ret = (int)fwrite(decrypted_buffer + written, 1,
868
751
(size_t)decrypted_buffer_size - written,
869
752
stdout);
870
753
if(ret == 0 and ferror(stdout)){
871
int e = errno;
872
754
if(debug){
873
755
fprintf(stderr, "Error writing encrypted data: %s\n",
874
756
strerror(errno));
875
757
}
876
errno = e;
877
goto mandos_end;
758
retval = -1;
759
break;
878
760
}
879
761
written += (size_t)ret;
880
762
}
881
retval = 0;
763
free(decrypted_buffer);
764
} else {
765
retval = -1;
882
766
}
767
} else {
768
retval = -1;
883
769
}
884
770
885
771
/* Shutdown procedure */
886
772
887
773
mandos_end:
888
{
889
int e = errno;
890
free(decrypted_buffer);
891
free(buffer);
892
if(tcp_sd >= 0){
893
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
894
}
895
if(ret == -1){
896
if(e == 0){
897
e = errno;
898
}
899
perror("close");
900
}
901
gnutls_deinit(session);
902
if(quit_now){
903
e = EINTR;
904
retval = -1;
905
}
906
errno = e;
774
free(buffer);
775
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
776
if(ret == -1){
777
perror("close");
907
778
}
779
gnutls_deinit(session);
908
780
return retval;
909
781
}
910
782
927
799
/* Called whenever a service has been resolved successfully or
928
800
timed out */
929
801
930
if(quit_now){
931
return;
932
}
933
934
802
switch(event){
935
803
default:
936
804
case AVAHI_RESOLVER_FAILURE:
973
841
/* Called whenever a new services becomes available on the LAN or
974
842
is removed from the LAN */
975
843
976
if(quit_now){
977
return;
978
}
979
980
844
switch(event){
981
845
default:
982
846
case AVAHI_BROWSER_FAILURE:
1011
875
}
1012
876
}
1013
877
878
sig_atomic_t quit_now = 0;
879
1014
880
/* stop main loop after sigterm has been called */
1015
static void handle_sigterm(int sig){
881
static void handle_sigterm(__attribute__((unused)) int sig){
1016
882
if(quit_now){
1017
883
return;
1018
884
}
1019
885
quit_now = 1;
1020
signal_received = sig;
1021
886
int old_errno = errno;
1022
887
if(mc.simple_poll != NULL){
1023
888
avahi_simple_poll_quit(mc.simple_poll);
1025
890
errno = old_errno;
1026
891
}
1027
892
1028
/*
1029
* This function determines if a directory entry in /sys/class/net
1030
* corresponds to an acceptable network device.
1031
* (This function is passed to scandir(3) as a filter function.)
1032
*/
1033
int good_interface(const struct dirent *if_entry){
1034
ssize_t ssret;
1035
char *flagname = NULL;
1036
if(if_entry->d_name[0] == '.'){
1037
return 0;
1038
}
1039
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1040
if_entry->d_name);
1041
if(ret < 0){
1042
perror("asprintf");
1043
return 0;
1044
}
1045
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1046
if(flags_fd == -1){
1047
perror("open");
1048
free(flagname);
1049
return 0;
1050
}
1051
free(flagname);
1052
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1053
/* read line from flags_fd */
1054
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1055
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1056
flagstring[(size_t)to_read] = '\0';
1057
if(flagstring == NULL){
1058
perror("malloc");
1059
close(flags_fd);
1060
return 0;
1061
}
1062
while(to_read > 0){
1063
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1064
(size_t)to_read));
1065
if(ssret == -1){
1066
perror("read");
1067
free(flagstring);
1068
close(flags_fd);
1069
return 0;
1070
}
1071
to_read -= ssret;
1072
if(ssret == 0){
1073
break;
1074
}
1075
}
1076
close(flags_fd);
1077
intmax_t tmpmax;
1078
char *tmp;
1079
errno = 0;
1080
tmpmax = strtoimax(flagstring, &tmp, 0);
1081
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1082
and not (isspace(*tmp)))
1083
or tmpmax != (ifreq_flags)tmpmax){
1084
if(debug){
1085
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1086
flagstring, if_entry->d_name);
1087
}
1088
free(flagstring);
1089
return 0;
1090
}
1091
free(flagstring);
1092
ifreq_flags flags = (ifreq_flags)tmpmax;
1093
/* Reject the loopback device */
1094
if(flags & IFF_LOOPBACK){
1095
if(debug){
1096
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1097
if_entry->d_name);
1098
}
1099
return 0;
1100
}
1101
/* Accept point-to-point devices only if connect_to is specified */
1102
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1103
if(debug){
1104
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1105
if_entry->d_name);
1106
}
1107
return 1;
1108
}
1109
/* Otherwise, reject non-broadcast-capable devices */
1110
if(not (flags & IFF_BROADCAST)){
1111
if(debug){
1112
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1113
if_entry->d_name);
1114
}
1115
return 0;
1116
}
1117
/* Reject non-ARP interfaces (including dummy interfaces) */
1118
if(flags & IFF_NOARP){
1119
if(debug){
1120
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1121
if_entry->d_name);
1122
}
1123
return 0;
1124
}
1125
/* Accept this device */
1126
if(debug){
1127
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1128
if_entry->d_name);
1129
}
1130
return 1;
1131
}
1132
1133
int notdotentries(const struct dirent *direntry){
1134
/* Skip "." and ".." */
1135
if(direntry->d_name[0] == '.'
1136
and (direntry->d_name[1] == '\0'
1137
or (direntry->d_name[1] == '.'
1138
and direntry->d_name[2] == '\0'))){
1139
return 0;
1140
}
1141
return 1;
1142
}
1143
1144
893
int main(int argc, char *argv[]){
1145
894
AvahiSServiceBrowser *sb = NULL;
1146
895
int error;
1148
897
intmax_t tmpmax;
1149
898
char *tmp;
1150
899
int exitcode = EXIT_SUCCESS;
1151
const char *interface = "";
900
const char *interface = "eth0";
1152
901
struct ifreq network;
1153
902
int sd = -1;
1154
bool take_down_interface = false;
903
bool interface_taken_up = false;
1155
904
uid_t uid;
1156
905
gid_t gid;
906
char *connect_to = NULL;
1157
907
char tempdir[] = "/tmp/mandosXXXXXX";
1158
908
bool tempdir_created = false;
1159
909
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1164
914
bool gpgme_initialized = false;
1165
915
float delay = 2.5f;
1166
916
1167
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
917
struct sigaction old_sigterm_action;
1168
918
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1169
919
1170
uid = getuid();
1171
gid = getgid();
1172
1173
/* Lower any group privileges we might have, just to be safe */
1174
errno = 0;
1175
ret = setgid(gid);
1176
if(ret == -1){
1177
perror("setgid");
1178
}
1179
1180
/* Lower user privileges (temporarily) */
1181
errno = 0;
1182
ret = seteuid(uid);
1183
if(ret == -1){
1184
perror("seteuid");
1185
}
1186
1187
if(quit_now){
1188
goto end;
1189
}
1190
1191
920
{
1192
921
struct argp_option options[] = {
1193
922
{ .name = "debug", .key = 128,
1222
951
.arg = "SECONDS",
1223
952
.doc = "Maximum delay to wait for interface startup",
1224
953
.group = 2 },
1225
/*
1226
* These reproduce what we would get without ARGP_NO_HELP
1227
*/
1228
{ .name = "help", .key = '?',
1229
.doc = "Give this help list", .group = -1 },
1230
{ .name = "usage", .key = -3,
1231
.doc = "Give a short usage message", .group = -1 },
1232
{ .name = "version", .key = 'V',
1233
.doc = "Print program version", .group = -1 },
1234
954
{ .name = NULL }
1235
955
};
1236
956
1237
957
error_t parse_opt(int key, char *arg,
1238
958
struct argp_state *state){
1239
errno = 0;
1240
959
switch(key){
1241
960
case 128: /* --debug */
1242
961
debug = true;
1258
977
tmpmax = strtoimax(arg, &tmp, 10);
1259
978
if(errno != 0 or tmp == arg or *tmp != '\0'
1260
979
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1261
argp_error(state, "Bad number of DH bits");
980
fprintf(stderr, "Bad number of DH bits\n");
981
exit(EXIT_FAILURE);
1262
982
}
1263
983
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1264
984
break;
1269
989
errno = 0;
1270
990
delay = strtof(arg, &tmp);
1271
991
if(errno != 0 or tmp == arg or *tmp != '\0'){
1272
argp_error(state, "Bad delay");
992
fprintf(stderr, "Bad delay\n");
993
exit(EXIT_FAILURE);
1273
994
}
1274
995
break;
1275
/*
1276
* These reproduce what we would get without ARGP_NO_HELP
1277
*/
1278
case '?': /* --help */
1279
argp_state_help(state, state->out_stream,
1280
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1281
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1282
case -3: /* --usage */
1283
argp_state_help(state, state->out_stream,
1284
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1285
case 'V': /* --version */
1286
fprintf(state->out_stream, "%s\n", argp_program_version);
1287
exit(argp_err_exit_status);
996
case ARGP_KEY_ARG:
997
argp_usage(state);
998
case ARGP_KEY_END:
1288
999
break;
1289
1000
default:
1290
1001
return ARGP_ERR_UNKNOWN;
1291
1002
}
1292
return errno;
1003
return 0;
1293
1004
}
1294
1005
1295
1006
struct argp argp = { .options = options, .parser = parse_opt,
1296
1007
.args_doc = "",
1297
1008
.doc = "Mandos client -- Get and decrypt"
1298
1009
" passwords from a Mandos server" };
1299
ret = argp_parse(&argp, argc, argv,
1300
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1301
switch(ret){
1302
case 0:
1303
break;
1304
case ENOMEM:
1305
default:
1306
errno = ret;
1307
perror("argp_parse");
1308
exitcode = EX_OSERR;
1309
goto end;
1310
case EINVAL:
1311
exitcode = EX_USAGE;
1010
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1011
if(ret == ARGP_ERR_UNKNOWN){
1012
fprintf(stderr, "Unknown error while parsing arguments\n");
1013
exitcode = EXIT_FAILURE;
1312
1014
goto end;
1313
1015
}
1314
1016
}
1316
1018
if(not debug){
1317
1019
avahi_set_log_function(empty_log);
1318
1020
}
1319
1320
if(interface[0] == '\0'){
1321
struct dirent **direntries;
1322
ret = scandir(sys_class_net, &direntries, good_interface,
1323
alphasort);
1324
if(ret >= 1){
1325
/* Pick the first good interface */
1326
interface = strdup(direntries[0]->d_name);
1327
if(debug){
1328
fprintf(stderr, "Using interface \"%s\"\n", interface);
1329
}
1330
if(interface == NULL){
1331
perror("malloc");
1332
free(direntries);
1333
exitcode = EXIT_FAILURE;
1334
goto end;
1335
}
1336
free(direntries);
1337
} else {
1338
free(direntries);
1339
fprintf(stderr, "Could not find a network interface\n");
1340
exitcode = EXIT_FAILURE;
1341
goto end;
1342
}
1343
}
1344
1021
1345
1022
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1346
1023
from the signal handler */
1349
1026
mc.simple_poll = avahi_simple_poll_new();
1350
1027
if(mc.simple_poll == NULL){
1351
1028
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1352
exitcode = EX_UNAVAILABLE;
1029
exitcode = EXIT_FAILURE;
1353
1030
goto end;
1354
1031
}
1355
1032
1357
1034
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1358
1035
if(ret == -1){
1359
1036
perror("sigaddset");
1360
exitcode = EX_OSERR;
1037
exitcode = EXIT_FAILURE;
1361
1038
goto end;
1362
1039
}
1363
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1364
1041
if(ret == -1){
1365
1042
perror("sigaddset");
1366
exitcode = EX_OSERR;
1043
exitcode = EXIT_FAILURE;
1367
1044
goto end;
1368
1045
}
1369
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1370
1047
if(ret == -1){
1371
1048
perror("sigaddset");
1372
exitcode = EX_OSERR;
1373
goto end;
1374
}
1375
/* Need to check if the handler is SIG_IGN before handling:
1376
| [[info:libc:Initial Signal Actions]] |
1377
| [[info:libc:Basic Signal Handling]] |
1378
*/
1379
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1380
if(ret == -1){
1381
perror("sigaction");
1382
return EX_OSERR;
1383
}
1384
if(old_sigterm_action.sa_handler != SIG_IGN){
1385
ret = sigaction(SIGINT, &sigterm_action, NULL);
1386
if(ret == -1){
1387
perror("sigaction");
1388
exitcode = EX_OSERR;
1389
goto end;
1390
}
1391
}
1392
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1393
if(ret == -1){
1394
perror("sigaction");
1395
return EX_OSERR;
1396
}
1397
if(old_sigterm_action.sa_handler != SIG_IGN){
1398
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1399
if(ret == -1){
1400
perror("sigaction");
1401
exitcode = EX_OSERR;
1402
goto end;
1403
}
1404
}
1405
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1406
if(ret == -1){
1407
perror("sigaction");
1408
return EX_OSERR;
1409
}
1410
if(old_sigterm_action.sa_handler != SIG_IGN){
1411
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1412
if(ret == -1){
1413
perror("sigaction");
1414
exitcode = EX_OSERR;
1415
goto end;
1416
}
1417
}
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1053
if(ret == -1){
1054
perror("sigaction");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1418
1058
1419
1059
/* If the interface is down, bring it up */
1420
if(strcmp(interface, "none") != 0){
1421
if_index = (AvahiIfIndex) if_nametoindex(interface);
1422
if(if_index == 0){
1423
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1424
exitcode = EX_UNAVAILABLE;
1425
goto end;
1426
}
1427
1428
if(quit_now){
1429
goto end;
1430
}
1431
1432
/* Re-raise priviliges */
1433
errno = 0;
1434
ret = seteuid(0);
1435
if(ret == -1){
1436
perror("seteuid");
1437
}
1438
1060
if(interface[0] != '\0'){
1439
1061
#ifdef __linux__
1440
1062
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1441
messages about the network interface to mess up the prompt */
1063
messages to mess up the prompt */
1442
1064
ret = klogctl(8, NULL, 5);
1443
1065
bool restore_loglevel = true;
1444
1066
if(ret == -1){
1450
1072
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1451
1073
if(sd < 0){
1452
1074
perror("socket");
1453
exitcode = EX_OSERR;
1075
exitcode = EXIT_FAILURE;
1454
1076
#ifdef __linux__
1455
1077
if(restore_loglevel){
1456
1078
ret = klogctl(7, NULL, 0);
1459
1081
}
1460
1082
}
1461
1083
#endif /* __linux__ */
1462
/* Lower privileges */
1463
errno = 0;
1464
ret = seteuid(uid);
1465
if(ret == -1){
1466
perror("seteuid");
1467
}
1468
1084
goto end;
1469
1085
}
1470
1086
strcpy(network.ifr_name, interface);
1479
1095
}
1480
1096
}
1481
1097
#endif /* __linux__ */
1482
exitcode = EX_OSERR;
1483
/* Lower privileges */
1484
errno = 0;
1485
ret = seteuid(uid);
1486
if(ret == -1){
1487
perror("seteuid");
1488
}
1098
exitcode = EXIT_FAILURE;
1489
1099
goto end;
1490
1100
}
1491
1101
if((network.ifr_flags & IFF_UP) == 0){
1492
1102
network.ifr_flags |= IFF_UP;
1493
take_down_interface = true;
1494
1103
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1495
1104
if(ret == -1){
1496
take_down_interface = false;
1497
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1498
exitcode = EX_OSERR;
1105
perror("ioctl SIOCSIFFLAGS");
1106
exitcode = EXIT_FAILURE;
1499
1107
#ifdef __linux__
1500
1108
if(restore_loglevel){
1501
1109
ret = klogctl(7, NULL, 0);
1504
1112
}
1505
1113
}
1506
1114
#endif /* __linux__ */
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror("seteuid");
1512
}
1513
1115
goto end;
1514
1116
}
1117
interface_taken_up = true;
1515
1118
}
1516
1119
/* sleep checking until interface is running */
1517
1120
for(int i=0; i < delay * 4; i++){
1527
1130
perror("nanosleep");
1528
1131
}
1529
1132
}
1530
if(not take_down_interface){
1531
/* We won't need the socket anymore */
1133
if(not interface_taken_up){
1532
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1533
1135
if(ret == -1){
1534
1136
perror("close");
1543
1145
}
1544
1146
}
1545
1147
#endif /* __linux__ */
1546
/* Lower privileges */
1547
errno = 0;
1548
if(take_down_interface){
1549
/* Lower privileges */
1550
ret = seteuid(uid);
1551
if(ret == -1){
1552
perror("seteuid");
1553
}
1554
} else {
1555
/* Lower privileges permanently */
1556
ret = setuid(uid);
1557
if(ret == -1){
1558
perror("setuid");
1559
}
1560
}
1561
}
1562
1563
if(quit_now){
1564
goto end;
1148
}
1149
1150
uid = getuid();
1151
gid = getgid();
1152
1153
errno = 0;
1154
setgid(gid);
1155
if(ret == -1){
1156
perror("setgid");
1157
}
1158
1159
ret = setuid(uid);
1160
if(ret == -1){
1161
perror("setuid");
1565
1162
}
1566
1163
1567
1164
ret = init_gnutls_global(pubkey, seckey);
1568
1165
if(ret == -1){
1569
1166
fprintf(stderr, "init_gnutls_global failed\n");
1570
exitcode = EX_UNAVAILABLE;
1167
exitcode = EXIT_FAILURE;
1571
1168
goto end;
1572
1169
} else {
1573
1170
gnutls_initialized = true;
1574
1171
}
1575
1172
1576
if(quit_now){
1577
goto end;
1578
}
1579
1580
1173
if(mkdtemp(tempdir) == NULL){
1581
1174
perror("mkdtemp");
1582
1175
goto end;
1583
1176
}
1584
1177
tempdir_created = true;
1585
1178
1586
if(quit_now){
1587
goto end;
1588
}
1589
1590
1179
if(not init_gpgme(pubkey, seckey, tempdir)){
1591
1180
fprintf(stderr, "init_gpgme failed\n");
1592
exitcode = EX_UNAVAILABLE;
1181
exitcode = EXIT_FAILURE;
1593
1182
goto end;
1594
1183
} else {
1595
1184
gpgme_initialized = true;
1596
1185
}
1597
1186
1598
if(quit_now){
1599
goto end;
1187
if(interface[0] != '\0'){
1188
if_index = (AvahiIfIndex) if_nametoindex(interface);
1189
if(if_index == 0){
1190
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1191
exitcode = EXIT_FAILURE;
1192
goto end;
1193
}
1600
1194
}
1601
1195
1602
1196
if(connect_to != NULL){
1605
1199
char *address = strrchr(connect_to, ':');
1606
1200
if(address == NULL){
1607
1201
fprintf(stderr, "No colon in address\n");
1608
exitcode = EX_USAGE;
1609
goto end;
1610
}
1611
1612
if(quit_now){
1613
goto end;
1614
}
1615
1202
exitcode = EXIT_FAILURE;
1203
goto end;
1204
}
1616
1205
uint16_t port;
1617
1206
errno = 0;
1618
1207
tmpmax = strtoimax(address+1, &tmp, 10);
1619
1208
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1620
1209
or tmpmax != (uint16_t)tmpmax){
1621
1210
fprintf(stderr, "Bad port number\n");
1622
exitcode = EX_USAGE;
1623
goto end;
1624
}
1625
1626
if(quit_now){
1627
goto end;
1628
}
1629
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1630
1214
port = (uint16_t)tmpmax;
1631
1215
*address = '\0';
1632
1216
address = connect_to;
1637
1221
} else {
1638
1222
af = AF_INET;
1639
1223
}
1640
1641
if(quit_now){
1642
goto end;
1643
}
1644
1645
while(not quit_now){
1646
ret = start_mandos_communication(address, port, if_index, af);
1647
if(quit_now or ret == 0){
1648
break;
1649
}
1650
sleep(15);
1651
};
1652
1653
if (not quit_now){
1224
ret = start_mandos_communication(address, port, if_index, af);
1225
if(ret < 0){
1226
exitcode = EXIT_FAILURE;
1227
} else {
1654
1228
exitcode = EXIT_SUCCESS;
1655
1229
}
1656
1657
goto end;
1658
}
1659
1660
if(quit_now){
1661
goto end;
1662
}
1663
1230
goto end;
1231
}
1232
1664
1233
{
1665
1234
AvahiServerConfig config;
1666
1235
/* Do not publish any local Zeroconf records */
1683
1252
if(mc.server == NULL){
1684
1253
fprintf(stderr, "Failed to create Avahi server: %s\n",
1685
1254
avahi_strerror(error));
1686
exitcode = EX_UNAVAILABLE;
1687
goto end;
1688
}
1689
1690
if(quit_now){
1255
exitcode = EXIT_FAILURE;
1691
1256
goto end;
1692
1257
}
1693
1258
1698
1263
if(sb == NULL){
1699
1264
fprintf(stderr, "Failed to create service browser: %s\n",
1700
1265
avahi_strerror(avahi_server_errno(mc.server)));
1701
exitcode = EX_UNAVAILABLE;
1702
goto end;
1703
}
1704
1705
if(quit_now){
1266
exitcode = EXIT_FAILURE;
1706
1267
goto end;
1707
1268
}
1708
1269
1741
1302
}
1742
1303
1743
1304
/* Take down the network interface */
1744
if(take_down_interface){
1745
/* Re-raise priviliges */
1746
errno = 0;
1747
ret = seteuid(0);
1305
if(interface_taken_up){
1306
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1748
1307
if(ret == -1){
1749
perror("seteuid");
1308
perror("ioctl SIOCGIFFLAGS");
1309
} else if(network.ifr_flags & IFF_UP) {
1310
network.ifr_flags &= ~IFF_UP; /* clear flag */
1311
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1312
if(ret == -1){
1313
perror("ioctl SIOCSIFFLAGS");
1314
}
1750
1315
}
1751
if(geteuid() == 0){
1752
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1753
if(ret == -1){
1754
perror("ioctl SIOCGIFFLAGS");
1755
} else if(network.ifr_flags & IFF_UP) {
1756
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1757
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1758
if(ret == -1){
1759
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1760
}
1761
}
1762
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1763
if(ret == -1){
1764
perror("close");
1765
}
1766
/* Lower privileges permanently */
1767
errno = 0;
1768
ret = setuid(uid);
1769
if(ret == -1){
1770
perror("setuid");
1771
}
1316
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1317
if(ret == -1){
1318
perror("close");
1772
1319
}
1773
1320
}
1774
1321
1775
/* Removes the GPGME temp directory and all files inside */
1322
/* Removes the temp directory used by GPGME */
1776
1323
if(tempdir_created){
1777
struct dirent **direntries = NULL;
1778
struct dirent *direntry = NULL;
1779
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1780
if (ret > 0){
1781
for(int i = 0; i < ret; i++){
1782
direntry = direntries[i];
1324
DIR *d;
1325
struct dirent *direntry;
1326
d = opendir(tempdir);
1327
if(d == NULL){
1328
if(errno != ENOENT){
1329
perror("opendir");
1330
}
1331
} else {
1332
while(true){
1333
direntry = readdir(d);
1334
if(direntry == NULL){
1335
break;
1336
}
1337
/* Skip "." and ".." */
1338
if(direntry->d_name[0] == '.'
1339
and (direntry->d_name[1] == '\0'
1340
or (direntry->d_name[1] == '.'
1341
and direntry->d_name[2] == '\0'))){
1342
continue;
1343
}
1783
1344
char *fullname = NULL;
1784
1345
ret = asprintf(&fullname, "%s/%s", tempdir,
1785
1346
direntry->d_name);
1794
1355
}
1795
1356
free(fullname);
1796
1357
}
1797
}
1798
1799
/* need to be cleaned even if ret == 0 because man page dont specify */
1800
free(direntries);
1801
if (ret == -1){
1802
perror("scandir");
1358
closedir(d);
1803
1359
}
1804
1360
ret = rmdir(tempdir);
1805
1361
if(ret == -1 and errno != ENOENT){
1807
1363
}
1808
1364
}
1809
1365
1810
if(quit_now){
1811
sigemptyset(&old_sigterm_action.sa_mask);
1812
old_sigterm_action.sa_handler = SIG_DFL;
1813
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1814
&old_sigterm_action,
1815
NULL));
1816
if(ret == -1){
1817
perror("sigaction");
1818
}
1819
do {
1820
ret = raise(signal_received);
1821
} while(ret != 0 and errno == EINTR);
1822
if(ret != 0){
1823
perror("raise");
1824
abort();
1825
}
1826
TEMP_FAILURE_RETRY(pause());
1827
}
1828
1829
1366
return exitcode;
1830
1367
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0