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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.
added
removed
plugins.d/mandos-client.c
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() */
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
int e = errno;
694
641
perror("connect");
695
errno = e;
696
goto mandos_end;
697
}
698
699
if(quit_now){
700
errno = EINTR;
701
goto mandos_end;
642
return -1;
702
643
}
703
644
704
645
const char *out = mandos_protocol_version;
708
649
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
709
650
out_size - written));
710
651
if(ret == -1){
711
int e = errno;
712
652
perror("write");
713
errno = e;
653
retval = -1;
714
654
goto mandos_end;
715
655
}
716
656
written += (size_t)ret;
724
664
break;
725
665
}
726
666
}
727
728
if(quit_now){
729
errno = EINTR;
730
goto mandos_end;
731
}
732
667
}
733
668
734
669
if(debug){
735
670
fprintf(stderr, "Establishing TLS session with %s\n", ip);
736
671
}
737
672
738
if(quit_now){
739
errno = EINTR;
740
goto mandos_end;
741
}
742
743
673
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
744
674
745
if(quit_now){
746
errno = EINTR;
747
goto mandos_end;
748
}
749
750
do {
675
do{
751
676
ret = gnutls_handshake(session);
752
if(quit_now){
753
errno = EINTR;
754
goto mandos_end;
755
}
756
677
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
757
678
758
679
if(ret != GNUTLS_E_SUCCESS){
760
681
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
761
682
gnutls_perror(ret);
762
683
}
763
errno = EPROTO;
684
retval = -1;
764
685
goto mandos_end;
765
686
}
766
687
772
693
}
773
694
774
695
while(true){
775
776
if(quit_now){
777
errno = EINTR;
778
goto mandos_end;
779
}
780
781
696
buffer_capacity = incbuffer(&buffer, buffer_length,
782
697
buffer_capacity);
783
698
if(buffer_capacity == 0){
784
int e = errno;
785
699
perror("incbuffer");
786
errno = e;
787
goto mandos_end;
788
}
789
790
if(quit_now){
791
errno = EINTR;
700
retval = -1;
792
701
goto mandos_end;
793
702
}
794
703
803
712
case GNUTLS_E_AGAIN:
804
713
break;
805
714
case GNUTLS_E_REHANDSHAKE:
806
do {
715
do{
807
716
ret = gnutls_handshake(session);
808
809
if(quit_now){
810
errno = EINTR;
811
goto mandos_end;
812
}
813
717
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
814
718
if(ret < 0){
815
719
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
816
720
gnutls_perror(ret);
817
errno = EPROTO;
721
retval = -1;
818
722
goto mandos_end;
819
723
}
820
724
break;
821
725
default:
822
726
fprintf(stderr, "Unknown error while reading data from"
823
727
" encrypted session with Mandos server\n");
728
retval = -1;
824
729
gnutls_bye(session, GNUTLS_SHUT_RDWR);
825
errno = EIO;
826
730
goto mandos_end;
827
731
}
828
732
} else {
834
738
fprintf(stderr, "Closing TLS session\n");
835
739
}
836
740
837
if(quit_now){
838
errno = EINTR;
839
goto mandos_end;
840
}
841
842
do {
843
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
844
if(quit_now){
845
errno = EINTR;
846
goto mandos_end;
847
}
848
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
741
gnutls_bye(session, GNUTLS_SHUT_RDWR);
849
742
850
743
if(buffer_length > 0){
851
ssize_t decrypted_buffer_size;
852
744
decrypted_buffer_size = pgp_packet_decrypt(buffer,
853
745
buffer_length,
854
746
&decrypted_buffer);
855
747
if(decrypted_buffer_size >= 0){
856
857
748
written = 0;
858
749
while(written < (size_t) decrypted_buffer_size){
859
if(quit_now){
860
errno = EINTR;
861
goto mandos_end;
862
}
863
864
750
ret = (int)fwrite(decrypted_buffer + written, 1,
865
751
(size_t)decrypted_buffer_size - written,
866
752
stdout);
867
753
if(ret == 0 and ferror(stdout)){
868
int e = errno;
869
754
if(debug){
870
755
fprintf(stderr, "Error writing encrypted data: %s\n",
871
756
strerror(errno));
872
757
}
873
errno = e;
874
goto mandos_end;
758
retval = -1;
759
break;
875
760
}
876
761
written += (size_t)ret;
877
762
}
878
retval = 0;
763
free(decrypted_buffer);
764
} else {
765
retval = -1;
879
766
}
767
} else {
768
retval = -1;
880
769
}
881
770
882
771
/* Shutdown procedure */
883
772
884
773
mandos_end:
885
{
886
int e = errno;
887
free(decrypted_buffer);
888
free(buffer);
889
if(tcp_sd >= 0){
890
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
891
}
892
if(ret == -1){
893
if(e == 0){
894
e = errno;
895
}
896
perror("close");
897
}
898
gnutls_deinit(session);
899
if(quit_now){
900
e = EINTR;
901
retval = -1;
902
}
903
errno = e;
774
free(buffer);
775
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
776
if(ret == -1){
777
perror("close");
904
778
}
779
gnutls_deinit(session);
905
780
return retval;
906
781
}
907
782
924
799
/* Called whenever a service has been resolved successfully or
925
800
timed out */
926
801
927
if(quit_now){
928
return;
929
}
930
931
802
switch(event){
932
803
default:
933
804
case AVAHI_RESOLVER_FAILURE:
970
841
/* Called whenever a new services becomes available on the LAN or
971
842
is removed from the LAN */
972
843
973
if(quit_now){
974
return;
975
}
976
977
844
switch(event){
978
845
default:
979
846
case AVAHI_BROWSER_FAILURE:
1008
875
}
1009
876
}
1010
877
878
sig_atomic_t quit_now = 0;
879
1011
880
/* stop main loop after sigterm has been called */
1012
static void handle_sigterm(int sig){
881
static void handle_sigterm(__attribute__((unused)) int sig){
1013
882
if(quit_now){
1014
883
return;
1015
884
}
1016
885
quit_now = 1;
1017
signal_received = sig;
1018
886
int old_errno = errno;
1019
887
if(mc.simple_poll != NULL){
1020
888
avahi_simple_poll_quit(mc.simple_poll);
1022
890
errno = old_errno;
1023
891
}
1024
892
1025
/*
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1029
*/
1030
int good_interface(const struct dirent *if_entry){
1031
ssize_t ssret;
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1034
if_entry->d_name);
1035
if(ret < 0){
1036
perror("asprintf");
1037
return 0;
1038
}
1039
if(if_entry->d_name[0] == '.'){
1040
return 0;
1041
}
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1043
if(flags_fd == -1){
1044
perror("open");
1045
return 0;
1046
}
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1053
perror("malloc");
1054
close(flags_fd);
1055
return 0;
1056
}
1057
while(to_read > 0){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1059
(size_t)to_read));
1060
if(ssret == -1){
1061
perror("read");
1062
free(flagstring);
1063
close(flags_fd);
1064
return 0;
1065
}
1066
to_read -= ssret;
1067
if(ssret == 0){
1068
break;
1069
}
1070
}
1071
close(flags_fd);
1072
intmax_t tmpmax;
1073
char *tmp;
1074
errno = 0;
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1079
if(debug){
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1082
}
1083
free(flagstring);
1084
return 0;
1085
}
1086
free(flagstring);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1088
/* Reject the loopback device */
1089
if(flags & IFF_LOOPBACK){
1090
if(debug){
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1092
if_entry->d_name);
1093
}
1094
return 0;
1095
}
1096
/* Accept point-to-point devices only if connect_to is specified */
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1098
if(debug){
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1100
if_entry->d_name);
1101
}
1102
return 1;
1103
}
1104
/* Otherwise, reject non-broadcast-capable devices */
1105
if(not (flags & IFF_BROADCAST)){
1106
if(debug){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1108
if_entry->d_name);
1109
}
1110
return 0;
1111
}
1112
/* Accept this device */
1113
if(debug){
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1115
if_entry->d_name);
1116
}
1117
return 1;
1118
}
1119
1120
893
int main(int argc, char *argv[]){
1121
894
AvahiSServiceBrowser *sb = NULL;
1122
895
int error;
1124
897
intmax_t tmpmax;
1125
898
char *tmp;
1126
899
int exitcode = EXIT_SUCCESS;
1127
const char *interface = "";
900
const char *interface = "eth0";
1128
901
struct ifreq network;
1129
902
int sd = -1;
1130
bool take_down_interface = false;
903
bool interface_taken_up = false;
1131
904
uid_t uid;
1132
905
gid_t gid;
906
char *connect_to = NULL;
1133
907
char tempdir[] = "/tmp/mandosXXXXXX";
1134
908
bool tempdir_created = false;
1135
909
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1140
914
bool gpgme_initialized = false;
1141
915
float delay = 2.5f;
1142
916
1143
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
917
struct sigaction old_sigterm_action;
1144
918
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1145
919
1146
uid = getuid();
1147
gid = getgid();
1148
1149
/* Lower any group privileges we might have, just to be safe */
1150
errno = 0;
1151
ret = setgid(gid);
1152
if(ret == -1){
1153
perror("setgid");
1154
}
1155
1156
/* Lower user privileges (temporarily) */
1157
errno = 0;
1158
ret = seteuid(uid);
1159
if(ret == -1){
1160
perror("seteuid");
1161
}
1162
1163
if(quit_now){
1164
goto end;
1165
}
1166
1167
920
{
1168
921
struct argp_option options[] = {
1169
922
{ .name = "debug", .key = 128,
1198
951
.arg = "SECONDS",
1199
952
.doc = "Maximum delay to wait for interface startup",
1200
953
.group = 2 },
1201
/*
1202
* These reproduce what we would get without ARGP_NO_HELP
1203
*/
1204
{ .name = "help", .key = '?',
1205
.doc = "Give this help list", .group = -1 },
1206
{ .name = "usage", .key = -3,
1207
.doc = "Give a short usage message", .group = -1 },
1208
{ .name = "version", .key = 'V',
1209
.doc = "Print program version", .group = -1 },
1210
954
{ .name = NULL }
1211
955
};
1212
956
1213
957
error_t parse_opt(int key, char *arg,
1214
958
struct argp_state *state){
1215
errno = 0;
1216
959
switch(key){
1217
960
case 128: /* --debug */
1218
961
debug = true;
1234
977
tmpmax = strtoimax(arg, &tmp, 10);
1235
978
if(errno != 0 or tmp == arg or *tmp != '\0'
1236
979
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1237
argp_error(state, "Bad number of DH bits");
980
fprintf(stderr, "Bad number of DH bits\n");
981
exit(EXIT_FAILURE);
1238
982
}
1239
983
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1240
984
break;
1245
989
errno = 0;
1246
990
delay = strtof(arg, &tmp);
1247
991
if(errno != 0 or tmp == arg or *tmp != '\0'){
1248
argp_error(state, "Bad delay");
992
fprintf(stderr, "Bad delay\n");
993
exit(EXIT_FAILURE);
1249
994
}
1250
995
break;
1251
/*
1252
* These reproduce what we would get without ARGP_NO_HELP
1253
*/
1254
case '?': /* --help */
1255
argp_state_help(state, state->out_stream,
1256
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1257
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1258
case -3: /* --usage */
1259
argp_state_help(state, state->out_stream,
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1261
case 'V': /* --version */
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1263
exit(argp_err_exit_status);
996
case ARGP_KEY_ARG:
997
argp_usage(state);
998
case ARGP_KEY_END:
1264
999
break;
1265
1000
default:
1266
1001
return ARGP_ERR_UNKNOWN;
1267
1002
}
1268
return errno;
1003
return 0;
1269
1004
}
1270
1005
1271
1006
struct argp argp = { .options = options, .parser = parse_opt,
1272
1007
.args_doc = "",
1273
1008
.doc = "Mandos client -- Get and decrypt"
1274
1009
" passwords from a Mandos server" };
1275
ret = argp_parse(&argp, argc, argv,
1276
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1277
switch(ret){
1278
case 0:
1279
break;
1280
case ENOMEM:
1281
default:
1282
errno = ret;
1283
perror("argp_parse");
1284
exitcode = EX_OSERR;
1285
goto end;
1286
case EINVAL:
1287
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;
1288
1014
goto end;
1289
1015
}
1290
1016
}
1292
1018
if(not debug){
1293
1019
avahi_set_log_function(empty_log);
1294
1020
}
1295
1296
if(interface[0] == '\0'){
1297
struct dirent **direntries;
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1299
alphasort);
1300
if(ret >= 1){
1301
/* Pick the first good interface */
1302
interface = strdup(direntries[0]->d_name);
1303
if(debug){
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1305
}
1306
if(interface == NULL){
1307
perror("malloc");
1308
free(direntries);
1309
exitcode = EXIT_FAILURE;
1310
goto end;
1311
}
1312
free(direntries);
1313
} else {
1314
free(direntries);
1315
fprintf(stderr, "Could not find a network interface\n");
1316
exitcode = EXIT_FAILURE;
1317
goto end;
1318
}
1319
}
1320
1021
1321
1022
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1322
1023
from the signal handler */
1325
1026
mc.simple_poll = avahi_simple_poll_new();
1326
1027
if(mc.simple_poll == NULL){
1327
1028
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1328
exitcode = EX_UNAVAILABLE;
1029
exitcode = EXIT_FAILURE;
1329
1030
goto end;
1330
1031
}
1331
1032
1333
1034
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1334
1035
if(ret == -1){
1335
1036
perror("sigaddset");
1336
exitcode = EX_OSERR;
1037
exitcode = EXIT_FAILURE;
1337
1038
goto end;
1338
1039
}
1339
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1340
1041
if(ret == -1){
1341
1042
perror("sigaddset");
1342
exitcode = EX_OSERR;
1043
exitcode = EXIT_FAILURE;
1343
1044
goto end;
1344
1045
}
1345
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1346
1047
if(ret == -1){
1347
1048
perror("sigaddset");
1348
exitcode = EX_OSERR;
1349
goto end;
1350
}
1351
/* Need to check if the handler is SIG_IGN before handling:
1352
| [[info:libc:Initial Signal Actions]] |
1353
| [[info:libc:Basic Signal Handling]] |
1354
*/
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1356
if(ret == -1){
1357
perror("sigaction");
1358
return EX_OSERR;
1359
}
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1362
if(ret == -1){
1363
perror("sigaction");
1364
exitcode = EX_OSERR;
1365
goto end;
1366
}
1367
}
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1369
if(ret == -1){
1370
perror("sigaction");
1371
return EX_OSERR;
1372
}
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1375
if(ret == -1){
1376
perror("sigaction");
1377
exitcode = EX_OSERR;
1378
goto end;
1379
}
1380
}
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1382
if(ret == -1){
1383
perror("sigaction");
1384
return EX_OSERR;
1385
}
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1388
if(ret == -1){
1389
perror("sigaction");
1390
exitcode = EX_OSERR;
1391
goto end;
1392
}
1393
}
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
}
1394
1058
1395
1059
/* If the interface is down, bring it up */
1396
if(strcmp(interface, "none") != 0){
1397
if_index = (AvahiIfIndex) if_nametoindex(interface);
1398
if(if_index == 0){
1399
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1400
exitcode = EX_UNAVAILABLE;
1401
goto end;
1402
}
1403
1404
if(quit_now){
1405
goto end;
1406
}
1407
1408
/* Re-raise priviliges */
1409
errno = 0;
1410
ret = seteuid(0);
1411
if(ret == -1){
1412
perror("seteuid");
1413
}
1414
1060
if(interface[0] != '\0'){
1415
1061
#ifdef __linux__
1416
1062
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1417
messages about the network interface to mess up the prompt */
1063
messages to mess up the prompt */
1418
1064
ret = klogctl(8, NULL, 5);
1419
1065
bool restore_loglevel = true;
1420
1066
if(ret == -1){
1426
1072
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1427
1073
if(sd < 0){
1428
1074
perror("socket");
1429
exitcode = EX_OSERR;
1075
exitcode = EXIT_FAILURE;
1430
1076
#ifdef __linux__
1431
1077
if(restore_loglevel){
1432
1078
ret = klogctl(7, NULL, 0);
1435
1081
}
1436
1082
}
1437
1083
#endif /* __linux__ */
1438
/* Lower privileges */
1439
errno = 0;
1440
ret = seteuid(uid);
1441
if(ret == -1){
1442
perror("seteuid");
1443
}
1444
1084
goto end;
1445
1085
}
1446
1086
strcpy(network.ifr_name, interface);
1455
1095
}
1456
1096
}
1457
1097
#endif /* __linux__ */
1458
exitcode = EX_OSERR;
1459
/* Lower privileges */
1460
errno = 0;
1461
ret = seteuid(uid);
1462
if(ret == -1){
1463
perror("seteuid");
1464
}
1098
exitcode = EXIT_FAILURE;
1465
1099
goto end;
1466
1100
}
1467
1101
if((network.ifr_flags & IFF_UP) == 0){
1468
1102
network.ifr_flags |= IFF_UP;
1469
take_down_interface = true;
1470
1103
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1471
1104
if(ret == -1){
1472
take_down_interface = false;
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1474
exitcode = EX_OSERR;
1105
perror("ioctl SIOCSIFFLAGS");
1106
exitcode = EXIT_FAILURE;
1475
1107
#ifdef __linux__
1476
1108
if(restore_loglevel){
1477
1109
ret = klogctl(7, NULL, 0);
1480
1112
}
1481
1113
}
1482
1114
#endif /* __linux__ */
1483
/* Lower privileges */
1484
errno = 0;
1485
ret = seteuid(uid);
1486
if(ret == -1){
1487
perror("seteuid");
1488
}
1489
1115
goto end;
1490
1116
}
1117
interface_taken_up = true;
1491
1118
}
1492
1119
/* sleep checking until interface is running */
1493
1120
for(int i=0; i < delay * 4; i++){
1503
1130
perror("nanosleep");
1504
1131
}
1505
1132
}
1506
if(not take_down_interface){
1507
/* We won't need the socket anymore */
1133
if(not interface_taken_up){
1508
1134
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1509
1135
if(ret == -1){
1510
1136
perror("close");
1519
1145
}
1520
1146
}
1521
1147
#endif /* __linux__ */
1522
/* Lower privileges */
1523
errno = 0;
1524
if(take_down_interface){
1525
/* Lower privileges */
1526
ret = seteuid(uid);
1527
if(ret == -1){
1528
perror("seteuid");
1529
}
1530
} else {
1531
/* Lower privileges permanently */
1532
ret = setuid(uid);
1533
if(ret == -1){
1534
perror("setuid");
1535
}
1536
}
1537
}
1538
1539
if(quit_now){
1540
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");
1541
1162
}
1542
1163
1543
1164
ret = init_gnutls_global(pubkey, seckey);
1544
1165
if(ret == -1){
1545
1166
fprintf(stderr, "init_gnutls_global failed\n");
1546
exitcode = EX_UNAVAILABLE;
1167
exitcode = EXIT_FAILURE;
1547
1168
goto end;
1548
1169
} else {
1549
1170
gnutls_initialized = true;
1550
1171
}
1551
1172
1552
if(quit_now){
1553
goto end;
1554
}
1555
1556
tempdir_created = true;
1557
1173
if(mkdtemp(tempdir) == NULL){
1558
tempdir_created = false;
1559
1174
perror("mkdtemp");
1560
1175
goto end;
1561
1176
}
1562
1563
if(quit_now){
1564
goto end;
1565
}
1177
tempdir_created = true;
1566
1178
1567
1179
if(not init_gpgme(pubkey, seckey, tempdir)){
1568
1180
fprintf(stderr, "init_gpgme failed\n");
1569
exitcode = EX_UNAVAILABLE;
1181
exitcode = EXIT_FAILURE;
1570
1182
goto end;
1571
1183
} else {
1572
1184
gpgme_initialized = true;
1573
1185
}
1574
1186
1575
if(quit_now){
1576
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
}
1577
1194
}
1578
1195
1579
1196
if(connect_to != NULL){
1582
1199
char *address = strrchr(connect_to, ':');
1583
1200
if(address == NULL){
1584
1201
fprintf(stderr, "No colon in address\n");
1585
exitcode = EX_USAGE;
1586
goto end;
1587
}
1588
1589
if(quit_now){
1590
goto end;
1591
}
1592
1202
exitcode = EXIT_FAILURE;
1203
goto end;
1204
}
1593
1205
uint16_t port;
1594
1206
errno = 0;
1595
1207
tmpmax = strtoimax(address+1, &tmp, 10);
1596
1208
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1597
1209
or tmpmax != (uint16_t)tmpmax){
1598
1210
fprintf(stderr, "Bad port number\n");
1599
exitcode = EX_USAGE;
1600
goto end;
1601
}
1602
1603
if(quit_now){
1604
goto end;
1605
}
1606
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1607
1214
port = (uint16_t)tmpmax;
1608
1215
*address = '\0';
1609
1216
address = connect_to;
1614
1221
} else {
1615
1222
af = AF_INET;
1616
1223
}
1617
1618
if(quit_now){
1619
goto end;
1620
}
1621
1622
1224
ret = start_mandos_communication(address, port, if_index, af);
1623
1225
if(ret < 0){
1624
switch(errno){
1625
case ENETUNREACH:
1626
case EHOSTDOWN:
1627
case EHOSTUNREACH:
1628
exitcode = EX_NOHOST;
1629
break;
1630
case EINVAL:
1631
exitcode = EX_USAGE;
1632
break;
1633
case EIO:
1634
exitcode = EX_IOERR;
1635
break;
1636
case EPROTO:
1637
exitcode = EX_PROTOCOL;
1638
break;
1639
default:
1640
exitcode = EX_OSERR;
1641
break;
1642
}
1226
exitcode = EXIT_FAILURE;
1643
1227
} else {
1644
1228
exitcode = EXIT_SUCCESS;
1645
1229
}
1646
1230
goto end;
1647
1231
}
1648
1649
if(quit_now){
1650
goto end;
1651
}
1652
1232
1653
1233
{
1654
1234
AvahiServerConfig config;
1655
1235
/* Do not publish any local Zeroconf records */
1672
1252
if(mc.server == NULL){
1673
1253
fprintf(stderr, "Failed to create Avahi server: %s\n",
1674
1254
avahi_strerror(error));
1675
exitcode = EX_UNAVAILABLE;
1676
goto end;
1677
}
1678
1679
if(quit_now){
1255
exitcode = EXIT_FAILURE;
1680
1256
goto end;
1681
1257
}
1682
1258
1687
1263
if(sb == NULL){
1688
1264
fprintf(stderr, "Failed to create service browser: %s\n",
1689
1265
avahi_strerror(avahi_server_errno(mc.server)));
1690
exitcode = EX_UNAVAILABLE;
1691
goto end;
1692
}
1693
1694
if(quit_now){
1266
exitcode = EXIT_FAILURE;
1695
1267
goto end;
1696
1268
}
1697
1269
1730
1302
}
1731
1303
1732
1304
/* Take down the network interface */
1733
if(take_down_interface){
1734
/* Re-raise priviliges */
1735
errno = 0;
1736
ret = seteuid(0);
1305
if(interface_taken_up){
1306
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1737
1307
if(ret == -1){
1738
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
}
1739
1315
}
1740
if(geteuid() == 0){
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1742
if(ret == -1){
1743
perror("ioctl SIOCGIFFLAGS");
1744
} else if(network.ifr_flags & IFF_UP) {
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1747
if(ret == -1){
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1749
}
1750
}
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1752
if(ret == -1){
1753
perror("close");
1754
}
1755
/* Lower privileges permanently */
1756
errno = 0;
1757
ret = setuid(uid);
1758
if(ret == -1){
1759
perror("setuid");
1760
}
1316
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1317
if(ret == -1){
1318
perror("close");
1761
1319
}
1762
1320
}
1763
1321
1805
1363
}
1806
1364
}
1807
1365
1808
if(quit_now){
1809
sigemptyset(&old_sigterm_action.sa_mask);
1810
old_sigterm_action.sa_handler = SIG_DFL;
1811
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1812
&old_sigterm_action,
1813
NULL));
1814
if(ret == -1){
1815
perror("sigaction");
1816
}
1817
do {
1818
ret = raise(signal_received);
1819
} while(ret != 0 and errno == EINTR);
1820
if(ret != 0){
1821
perror("raise");
1822
abort();
1823
}
1824
TEMP_FAILURE_RETRY(pause());
1825
}
1826
1827
1366
return exitcode;
1828
1367
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0