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- Committer: Teddy Hogeborn
- Date: 2009-10-25 19:06:56 UTC
- Revision ID: teddy@fukt.bsnet.se-20091025190656-jdj54g1ra7wbglxh
* Makefile: Don't use PIE if BROKEN_PIE is set.
* debian/rules: Set BROKEN_PIE on mips and mipsel architectures.
* debian/rules: Set BROKEN_PIE on mips and mipsel architectures.
- 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(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno, program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
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 */
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
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
133
/* Doubly linked list that need to be circular linked when ever used */
134
typedef struct server{
135
const char *ip;
136
uint16_t port;
137
AvahiIfIndex if_index;
138
int af;
139
struct timespec last_seen;
140
struct server *next;
141
struct server *prev;
142
} server;
143
128
144
129
/* Used for passing in values through the Avahi callback functions */
145
130
typedef struct {
150
135
gnutls_dh_params_t dh_params;
151
136
const char *priority;
152
137
gpgme_ctx_t ctx;
153
server *current_server;
154
138
} mandos_context;
155
139
156
140
/* global context so signal handler can reach it*/
157
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
158
142
.dh_bits = 1024, .priority = "SECURE256"
159
":!CTYPE-X.509:+CTYPE-OPENPGP", .current_server = NULL };
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
160
144
161
145
sig_atomic_t quit_now = 0;
162
146
int signal_received = 0;
163
147
164
/* Function to use when printing errors */
165
void perror_plus(const char *print_text){
166
fprintf(stderr, "Mandos plugin %s: ", program_invocation_short_name);
167
perror(print_text);
168
}
169
170
148
/*
171
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
172
150
* bytes. "buffer_capacity" is how much is currently allocated,
184
162
return buffer_capacity;
185
163
}
186
164
187
int add_server(const char *ip, uint16_t port,
188
AvahiIfIndex if_index,
189
int af){
190
int ret;
191
server *new_server = malloc(sizeof(server));
192
if(new_server == NULL){
193
perror_plus("malloc");
194
return -1;
195
}
196
*new_server = (server){ .ip = strdup(ip),
197
.port = port,
198
.if_index = if_index,
199
.af = af };
200
if(new_server->ip == NULL){
201
perror_plus("strdup");
202
return -1;
203
}
204
/* uniqe case of first server */
205
if (mc.current_server == NULL){
206
new_server->next = new_server;
207
new_server->prev = new_server;
208
mc.current_server = new_server;
209
/* Placing the new server last in the list */
210
} else {
211
new_server->next = mc.current_server;
212
new_server->prev = mc.current_server->prev;
213
new_server->prev->next = new_server;
214
mc.current_server->prev = new_server;
215
}
216
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
217
if(ret == -1){
218
perror_plus("clock_gettime");
219
return -1;
220
}
221
return 0;
222
}
223
224
165
/*
225
166
* Initialize GPGME.
226
167
*/
240
181
241
182
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
242
183
if(fd == -1){
243
perror_plus("open");
184
perror("open");
244
185
return false;
245
186
}
246
187
260
201
261
202
ret = (int)TEMP_FAILURE_RETRY(close(fd));
262
203
if(ret == -1){
263
perror_plus("close");
204
perror("close");
264
205
}
265
206
gpgme_data_release(pgp_data);
266
207
return true;
391
332
392
333
/* Seek back to the beginning of the GPGME plaintext data buffer */
393
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
394
perror_plus("gpgme_data_seek");
335
perror("gpgme_data_seek");
395
336
plaintext_length = -1;
396
337
goto decrypt_end;
397
338
}
402
343
(size_t)plaintext_length,
403
344
plaintext_capacity);
404
345
if(plaintext_capacity == 0){
405
perror_plus("incbuffer");
346
perror("incbuffer");
406
347
plaintext_length = -1;
407
348
goto decrypt_end;
408
349
}
415
356
break;
416
357
}
417
358
if(ret < 0){
418
perror_plus("gpgme_data_read");
359
perror("gpgme_data_read");
419
360
plaintext_length = -1;
420
361
goto decrypt_end;
421
362
}
611
552
gnutls_session_t session;
612
553
int pf; /* Protocol family */
613
554
614
errno = 0;
615
616
555
if(quit_now){
617
errno = EINTR;
618
556
return -1;
619
557
}
620
558
627
565
break;
628
566
default:
629
567
fprintf(stderr, "Bad address family: %d\n", af);
630
errno = EINVAL;
631
568
return -1;
632
569
}
633
570
643
580
644
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
645
582
if(tcp_sd < 0){
646
int e = errno;
647
perror_plus("socket");
648
errno = e;
583
perror("socket");
649
584
goto mandos_end;
650
585
}
651
586
652
587
if(quit_now){
653
errno = EINTR;
654
588
goto mandos_end;
655
589
}
656
590
663
597
ret = inet_pton(af, ip, &to.in.sin_addr);
664
598
}
665
599
if(ret < 0 ){
666
int e = errno;
667
perror_plus("inet_pton");
668
errno = e;
600
perror("inet_pton");
669
601
goto mandos_end;
670
602
}
671
603
if(ret == 0){
672
int e = errno;
673
604
fprintf(stderr, "Bad address: %s\n", ip);
674
errno = e;
675
605
goto mandos_end;
676
606
}
677
607
if(af == AF_INET6){
685
615
if(if_index == AVAHI_IF_UNSPEC){
686
616
fprintf(stderr, "An IPv6 link-local address is incomplete"
687
617
" without a network interface\n");
688
errno = EINVAL;
689
618
goto mandos_end;
690
619
}
691
620
/* Set the network interface number as scope */
698
627
}
699
628
700
629
if(quit_now){
701
errno = EINTR;
702
630
goto mandos_end;
703
631
}
704
632
706
634
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
707
635
char interface[IF_NAMESIZE];
708
636
if(if_indextoname((unsigned int)if_index, interface) == NULL){
709
perror_plus("if_indextoname");
637
perror("if_indextoname");
710
638
} else {
711
639
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
640
ip, interface, port);
726
654
sizeof(addrstr));
727
655
}
728
656
if(pcret == NULL){
729
perror_plus("inet_ntop");
657
perror("inet_ntop");
730
658
} else {
731
659
if(strcmp(addrstr, ip) != 0){
732
660
fprintf(stderr, "Canonical address form: %s\n", addrstr);
735
663
}
736
664
737
665
if(quit_now){
738
errno = EINTR;
739
666
goto mandos_end;
740
667
}
741
668
745
672
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
746
673
}
747
674
if(ret < 0){
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
749
int e = errno;
750
perror_plus("connect");
751
errno = e;
752
}
675
perror("connect");
753
676
goto mandos_end;
754
677
}
755
678
756
679
if(quit_now){
757
errno = EINTR;
758
680
goto mandos_end;
759
681
}
760
682
765
687
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
766
688
out_size - written));
767
689
if(ret == -1){
768
int e = errno;
769
perror_plus("write");
770
errno = e;
690
perror("write");
771
691
goto mandos_end;
772
692
}
773
693
written += (size_t)ret;
783
703
}
784
704
785
705
if(quit_now){
786
errno = EINTR;
787
706
goto mandos_end;
788
707
}
789
708
}
793
712
}
794
713
795
714
if(quit_now){
796
errno = EINTR;
797
715
goto mandos_end;
798
716
}
799
800
/* Spurious warnings from -Wint-to-pointer-cast */
717
801
718
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
802
719
803
720
if(quit_now){
804
errno = EINTR;
805
721
goto mandos_end;
806
722
}
807
723
808
724
do {
809
725
ret = gnutls_handshake(session);
810
726
if(quit_now){
811
errno = EINTR;
812
727
goto mandos_end;
813
728
}
814
729
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
818
733
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
819
734
gnutls_perror(ret);
820
735
}
821
errno = EPROTO;
822
736
goto mandos_end;
823
737
}
824
738
832
746
while(true){
833
747
834
748
if(quit_now){
835
errno = EINTR;
836
749
goto mandos_end;
837
750
}
838
751
839
752
buffer_capacity = incbuffer(&buffer, buffer_length,
840
753
buffer_capacity);
841
754
if(buffer_capacity == 0){
842
int e = errno;
843
perror_plus("incbuffer");
844
errno = e;
755
perror("incbuffer");
845
756
goto mandos_end;
846
757
}
847
758
848
759
if(quit_now){
849
errno = EINTR;
850
760
goto mandos_end;
851
761
}
852
762
865
775
ret = gnutls_handshake(session);
866
776
867
777
if(quit_now){
868
errno = EINTR;
869
778
goto mandos_end;
870
779
}
871
780
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
872
781
if(ret < 0){
873
782
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
874
783
gnutls_perror(ret);
875
errno = EPROTO;
876
784
goto mandos_end;
877
785
}
878
786
break;
880
788
fprintf(stderr, "Unknown error while reading data from"
881
789
" encrypted session with Mandos server\n");
882
790
gnutls_bye(session, GNUTLS_SHUT_RDWR);
883
errno = EIO;
884
791
goto mandos_end;
885
792
}
886
793
} else {
893
800
}
894
801
895
802
if(quit_now){
896
errno = EINTR;
897
803
goto mandos_end;
898
804
}
899
805
900
806
do {
901
807
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
902
808
if(quit_now){
903
errno = EINTR;
904
809
goto mandos_end;
905
810
}
906
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
915
820
written = 0;
916
821
while(written < (size_t) decrypted_buffer_size){
917
822
if(quit_now){
918
errno = EINTR;
919
823
goto mandos_end;
920
824
}
921
825
923
827
(size_t)decrypted_buffer_size - written,
924
828
stdout);
925
829
if(ret == 0 and ferror(stdout)){
926
int e = errno;
927
830
if(debug){
928
831
fprintf(stderr, "Error writing encrypted data: %s\n",
929
832
strerror(errno));
930
833
}
931
errno = e;
932
834
goto mandos_end;
933
835
}
934
836
written += (size_t)ret;
940
842
/* Shutdown procedure */
941
843
942
844
mandos_end:
943
{
944
int e = errno;
945
free(decrypted_buffer);
946
free(buffer);
947
if(tcp_sd >= 0){
948
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
949
}
950
if(ret == -1){
951
if(e == 0){
952
e = errno;
953
}
954
perror_plus("close");
955
}
956
gnutls_deinit(session);
957
errno = e;
958
if(quit_now){
959
errno = EINTR;
960
retval = -1;
961
}
845
free(decrypted_buffer);
846
free(buffer);
847
if(tcp_sd >= 0){
848
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
849
}
850
if(ret == -1){
851
perror("close");
852
}
853
gnutls_deinit(session);
854
if(quit_now){
855
retval = -1;
962
856
}
963
857
return retval;
964
858
}
1007
901
avahi_proto_to_af(proto));
1008
902
if(ret == 0){
1009
903
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1013
904
}
1014
905
}
1015
906
}
1069
960
}
1070
961
}
1071
962
1072
/* Signal handler that stops main loop after sigterm has been called */
963
/* stop main loop after sigterm has been called */
1073
964
static void handle_sigterm(int sig){
1074
965
if(quit_now){
1075
966
return;
1077
968
quit_now = 1;
1078
969
signal_received = sig;
1079
970
int old_errno = errno;
1080
/* set main loop to exit */
1081
971
if(mc.simple_poll != NULL){
1082
972
avahi_simple_poll_quit(mc.simple_poll);
1083
973
}
1084
974
errno = old_errno;
1085
975
}
1086
976
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1143
if(debug){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1146
}
1147
free(flagstring);
1148
return 0;
1149
}
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1154
if(debug){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1157
}
1158
return 0;
1159
}
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1162
if(debug){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1165
}
1166
return 1;
1167
}
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1170
if(debug){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1173
}
1174
return 0;
1175
}
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1178
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1181
}
1182
return 0;
1183
}
1184
/* Accept this device */
1185
if(debug){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1188
}
1189
return 1;
1190
}
1191
1192
int notdotentries(const struct dirent *direntry){
1193
/* Skip "." and ".." */
1194
if(direntry->d_name[0] == '.'
1195
and (direntry->d_name[1] == '\0'
1196
or (direntry->d_name[1] == '.'
1197
and direntry->d_name[2] == '\0'))){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
int ret;
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1208
1209
while(true){
1210
if(mc.current_server == NULL){
1211
if (debug){
1212
fprintf(stderr, "Wait until first server is found. No timeout!\n");
1213
}
1214
ret = avahi_simple_poll_iterate(s, -1);
1215
} else {
1216
if (debug){
1217
fprintf(stderr, "Check current_server if we should run it, or wait\n");
1218
}
1219
/* the current time */
1220
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1221
if(ret == -1){
1222
perror_plus("clock_gettime");
1223
return -1;
1224
}
1225
/* Calculating in ms how long time between now and server
1226
who we visted longest time ago. Now - last seen. */
1227
waited_time.tv_sec = now.tv_sec - mc.current_server->last_seen.tv_sec;
1228
waited_time.tv_nsec = now.tv_nsec - mc.current_server->last_seen.tv_nsec;
1229
/* total time is 10s/10000ms. Converting to s to ms by 1000/s, and ns to ms by divind by 1000000. */
1230
block_time = (retry_interval - ((intmax_t)waited_time.tv_sec * 1000)) - ((intmax_t)waited_time.tv_nsec / 1000000);
1231
1232
if (debug){
1233
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1234
}
1235
1236
if(block_time <= 0){
1237
ret = start_mandos_communication(mc.current_server->ip,
1238
mc.current_server->port,
1239
mc.current_server->if_index,
1240
mc.current_server->af);
1241
if(ret == 0){
1242
avahi_simple_poll_quit(mc.simple_poll);
1243
return 0;
1244
}
1245
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
1246
if(ret == -1){
1247
perror_plus("clock_gettime");
1248
return -1;
1249
}
1250
mc.current_server = mc.current_server->next;
1251
block_time = 0; /* call avahi to find new mandos servers, but dont block */
1252
}
1253
1254
ret = avahi_simple_poll_iterate(s, (int)block_time);
1255
}
1256
if(ret != 0){
1257
if (ret > 0 or errno != EINTR) {
1258
return (ret != 1) ? ret : 0;
1259
}
1260
}
1261
}
1262
}
1263
1264
977
int main(int argc, char *argv[]){
1265
978
AvahiSServiceBrowser *sb = NULL;
1266
979
int error;
1268
981
intmax_t tmpmax;
1269
982
char *tmp;
1270
983
int exitcode = EXIT_SUCCESS;
1271
const char *interface = "";
984
const char *interface = "eth0";
1272
985
struct ifreq network;
1273
986
int sd = -1;
1274
987
bool take_down_interface = false;
1275
988
uid_t uid;
1276
989
gid_t gid;
990
char *connect_to = NULL;
1277
991
char tempdir[] = "/tmp/mandosXXXXXX";
1278
992
bool tempdir_created = false;
1279
993
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1283
997
bool gnutls_initialized = false;
1284
998
bool gpgme_initialized = false;
1285
999
float delay = 2.5f;
1286
double retry_interval = 10; /* 10s between retrying a server and checking again*/
1287
1000
1288
1001
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1289
1002
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1295
1008
errno = 0;
1296
1009
ret = setgid(gid);
1297
1010
if(ret == -1){
1298
perror_plus("setgid");
1011
perror("setgid");
1299
1012
}
1300
1013
1301
1014
/* Lower user privileges (temporarily) */
1302
1015
errno = 0;
1303
1016
ret = seteuid(uid);
1304
1017
if(ret == -1){
1305
perror_plus("seteuid");
1018
perror("seteuid");
1306
1019
}
1307
1020
1308
1021
if(quit_now){
1343
1056
.arg = "SECONDS",
1344
1057
.doc = "Maximum delay to wait for interface startup",
1345
1058
.group = 2 },
1346
{ .name = "retry", .key = 132,
1347
.arg = "SECONDS",
1348
.doc = "Retry interval used when denied by the mandos server",
1349
.group = 2 },
1350
/*
1351
* These reproduce what we would get without ARGP_NO_HELP
1352
*/
1353
{ .name = "help", .key = '?',
1354
.doc = "Give this help list", .group = -1 },
1355
{ .name = "usage", .key = -3,
1356
.doc = "Give a short usage message", .group = -1 },
1357
{ .name = "version", .key = 'V',
1358
.doc = "Print program version", .group = -1 },
1359
1059
{ .name = NULL }
1360
1060
};
1361
1061
1362
1062
error_t parse_opt(int key, char *arg,
1363
1063
struct argp_state *state){
1364
errno = 0;
1365
1064
switch(key){
1366
1065
case 128: /* --debug */
1367
1066
debug = true;
1383
1082
tmpmax = strtoimax(arg, &tmp, 10);
1384
1083
if(errno != 0 or tmp == arg or *tmp != '\0'
1385
1084
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1386
argp_error(state, "Bad number of DH bits");
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1387
1087
}
1388
1088
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1389
1089
break;
1394
1094
errno = 0;
1395
1095
delay = strtof(arg, &tmp);
1396
1096
if(errno != 0 or tmp == arg or *tmp != '\0'){
1397
argp_error(state, "Bad delay");
1398
}
1399
case 132: /* --retry */
1400
errno = 0;
1401
retry_interval = strtod(arg, &tmp);
1402
if(errno != 0 or tmp == arg or *tmp != '\0'
1403
or (retry_interval * 1000) > INT_MAX){
1404
argp_error(state, "Bad retry interval");
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
1405
1099
}
1406
1100
break;
1407
/*
1408
* These reproduce what we would get without ARGP_NO_HELP
1409
*/
1410
case '?': /* --help */
1411
argp_state_help(state, state->out_stream,
1412
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1413
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1414
case -3: /* --usage */
1415
argp_state_help(state, state->out_stream,
1416
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1417
case 'V': /* --version */
1418
fprintf(state->out_stream, "%s\n", argp_program_version);
1419
exit(argp_err_exit_status);
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
1420
1104
break;
1421
1105
default:
1422
1106
return ARGP_ERR_UNKNOWN;
1423
1107
}
1424
return errno;
1108
return 0;
1425
1109
}
1426
1110
1427
1111
struct argp argp = { .options = options, .parser = parse_opt,
1428
1112
.args_doc = "",
1429
1113
.doc = "Mandos client -- Get and decrypt"
1430
1114
" passwords from a Mandos server" };
1431
ret = argp_parse(&argp, argc, argv,
1432
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1433
switch(ret){
1434
case 0:
1435
break;
1436
case ENOMEM:
1437
default:
1438
errno = ret;
1439
perror_plus("argp_parse");
1440
exitcode = EX_OSERR;
1441
goto end;
1442
case EINVAL:
1443
exitcode = EX_USAGE;
1115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1116
if(ret == ARGP_ERR_UNKNOWN){
1117
fprintf(stderr, "Unknown error while parsing arguments\n");
1118
exitcode = EXIT_FAILURE;
1444
1119
goto end;
1445
1120
}
1446
1121
}
1448
1123
if(not debug){
1449
1124
avahi_set_log_function(empty_log);
1450
1125
}
1451
1452
if(interface[0] == '\0'){
1453
struct dirent **direntries;
1454
ret = scandir(sys_class_net, &direntries, good_interface,
1455
alphasort);
1456
if(ret >= 1){
1457
/* Pick the first good interface */
1458
interface = strdup(direntries[0]->d_name);
1459
if(debug){
1460
fprintf(stderr, "Using interface \"%s\"\n", interface);
1461
}
1462
if(interface == NULL){
1463
perror_plus("malloc");
1464
free(direntries);
1465
exitcode = EXIT_FAILURE;
1466
goto end;
1467
}
1468
free(direntries);
1469
} else {
1470
free(direntries);
1471
fprintf(stderr, "Could not find a network interface\n");
1472
exitcode = EXIT_FAILURE;
1473
goto end;
1474
}
1475
}
1476
1126
1477
1127
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1478
1128
from the signal handler */
1481
1131
mc.simple_poll = avahi_simple_poll_new();
1482
1132
if(mc.simple_poll == NULL){
1483
1133
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1484
exitcode = EX_UNAVAILABLE;
1134
exitcode = EXIT_FAILURE;
1485
1135
goto end;
1486
1136
}
1487
1137
1488
1138
sigemptyset(&sigterm_action.sa_mask);
1489
1139
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1490
1140
if(ret == -1){
1491
perror_plus("sigaddset");
1492
exitcode = EX_OSERR;
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1493
1143
goto end;
1494
1144
}
1495
1145
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1496
1146
if(ret == -1){
1497
perror_plus("sigaddset");
1498
exitcode = EX_OSERR;
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1499
1149
goto end;
1500
1150
}
1501
1151
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1502
1152
if(ret == -1){
1503
perror_plus("sigaddset");
1504
exitcode = EX_OSERR;
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1505
1155
goto end;
1506
1156
}
1507
1157
/* Need to check if the handler is SIG_IGN before handling:
1510
1160
*/
1511
1161
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1512
1162
if(ret == -1){
1513
perror_plus("sigaction");
1514
return EX_OSERR;
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1515
1165
}
1516
1166
if(old_sigterm_action.sa_handler != SIG_IGN){
1517
1167
ret = sigaction(SIGINT, &sigterm_action, NULL);
1518
1168
if(ret == -1){
1519
perror_plus("sigaction");
1520
exitcode = EX_OSERR;
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1521
1171
goto end;
1522
1172
}
1523
1173
}
1524
1174
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1525
1175
if(ret == -1){
1526
perror_plus("sigaction");
1527
return EX_OSERR;
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1528
1178
}
1529
1179
if(old_sigterm_action.sa_handler != SIG_IGN){
1530
1180
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1531
1181
if(ret == -1){
1532
perror_plus("sigaction");
1533
exitcode = EX_OSERR;
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1534
1184
goto end;
1535
1185
}
1536
1186
}
1537
1187
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1538
1188
if(ret == -1){
1539
perror_plus("sigaction");
1540
return EX_OSERR;
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1541
1191
}
1542
1192
if(old_sigterm_action.sa_handler != SIG_IGN){
1543
1193
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1544
1194
if(ret == -1){
1545
perror_plus("sigaction");
1546
exitcode = EX_OSERR;
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1547
1197
goto end;
1548
1198
}
1549
1199
}
1550
1200
1551
1201
/* If the interface is down, bring it up */
1552
if(strcmp(interface, "none") != 0){
1202
if(interface[0] != '\0'){
1553
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
1554
1204
if(if_index == 0){
1555
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1556
exitcode = EX_UNAVAILABLE;
1206
exitcode = EXIT_FAILURE;
1557
1207
goto end;
1558
1208
}
1559
1209
1565
1215
errno = 0;
1566
1216
ret = seteuid(0);
1567
1217
if(ret == -1){
1568
perror_plus("seteuid");
1218
perror("seteuid");
1569
1219
}
1570
1220
1571
1221
#ifdef __linux__
1572
1222
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1573
messages about the network interface to mess up the prompt */
1223
messages to mess up the prompt */
1574
1224
ret = klogctl(8, NULL, 5);
1575
1225
bool restore_loglevel = true;
1576
1226
if(ret == -1){
1577
1227
restore_loglevel = false;
1578
perror_plus("klogctl");
1228
perror("klogctl");
1579
1229
}
1580
1230
#endif /* __linux__ */
1581
1231
1582
1232
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1583
1233
if(sd < 0){
1584
perror_plus("socket");
1585
exitcode = EX_OSERR;
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1586
1236
#ifdef __linux__
1587
1237
if(restore_loglevel){
1588
1238
ret = klogctl(7, NULL, 0);
1589
1239
if(ret == -1){
1590
perror_plus("klogctl");
1240
perror("klogctl");
1591
1241
}
1592
1242
}
1593
1243
#endif /* __linux__ */
1595
1245
errno = 0;
1596
1246
ret = seteuid(uid);
1597
1247
if(ret == -1){
1598
perror_plus("seteuid");
1248
perror("seteuid");
1599
1249
}
1600
1250
goto end;
1601
1251
}
1602
1252
strcpy(network.ifr_name, interface);
1603
1253
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1604
1254
if(ret == -1){
1605
perror_plus("ioctl SIOCGIFFLAGS");
1255
perror("ioctl SIOCGIFFLAGS");
1606
1256
#ifdef __linux__
1607
1257
if(restore_loglevel){
1608
1258
ret = klogctl(7, NULL, 0);
1609
1259
if(ret == -1){
1610
perror_plus("klogctl");
1260
perror("klogctl");
1611
1261
}
1612
1262
}
1613
1263
#endif /* __linux__ */
1614
exitcode = EX_OSERR;
1264
exitcode = EXIT_FAILURE;
1615
1265
/* Lower privileges */
1616
1266
errno = 0;
1617
1267
ret = seteuid(uid);
1618
1268
if(ret == -1){
1619
perror_plus("seteuid");
1269
perror("seteuid");
1620
1270
}
1621
1271
goto end;
1622
1272
}
1626
1276
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1627
1277
if(ret == -1){
1628
1278
take_down_interface = false;
1629
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1630
exitcode = EX_OSERR;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1631
1281
#ifdef __linux__
1632
1282
if(restore_loglevel){
1633
1283
ret = klogctl(7, NULL, 0);
1634
1284
if(ret == -1){
1635
perror_plus("klogctl");
1285
perror("klogctl");
1636
1286
}
1637
1287
}
1638
1288
#endif /* __linux__ */
1640
1290
errno = 0;
1641
1291
ret = seteuid(uid);
1642
1292
if(ret == -1){
1643
perror_plus("seteuid");
1293
perror("seteuid");
1644
1294
}
1645
1295
goto end;
1646
1296
}
1647
1297
}
1648
/* sleep checking until interface is running. Check every 0.25s, up to total time of delay */
1298
/* sleep checking until interface is running */
1649
1299
for(int i=0; i < delay * 4; i++){
1650
1300
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1651
1301
if(ret == -1){
1652
perror_plus("ioctl SIOCGIFFLAGS");
1302
perror("ioctl SIOCGIFFLAGS");
1653
1303
} else if(network.ifr_flags & IFF_RUNNING){
1654
1304
break;
1655
1305
}
1656
1306
struct timespec sleeptime = { .tv_nsec = 250000000 };
1657
1307
ret = nanosleep(&sleeptime, NULL);
1658
1308
if(ret == -1 and errno != EINTR){
1659
perror_plus("nanosleep");
1309
perror("nanosleep");
1660
1310
}
1661
1311
}
1662
1312
if(not take_down_interface){
1663
1313
/* We won't need the socket anymore */
1664
1314
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1665
1315
if(ret == -1){
1666
perror_plus("close");
1316
perror("close");
1667
1317
}
1668
1318
}
1669
1319
#ifdef __linux__
1671
1321
/* Restores kernel loglevel to default */
1672
1322
ret = klogctl(7, NULL, 0);
1673
1323
if(ret == -1){
1674
perror_plus("klogctl");
1324
perror("klogctl");
1675
1325
}
1676
1326
}
1677
1327
#endif /* __linux__ */
1681
1331
/* Lower privileges */
1682
1332
ret = seteuid(uid);
1683
1333
if(ret == -1){
1684
perror_plus("seteuid");
1334
perror("seteuid");
1685
1335
}
1686
1336
} else {
1687
1337
/* Lower privileges permanently */
1688
1338
ret = setuid(uid);
1689
1339
if(ret == -1){
1690
perror_plus("setuid");
1340
perror("setuid");
1691
1341
}
1692
1342
}
1693
1343
}
1699
1349
ret = init_gnutls_global(pubkey, seckey);
1700
1350
if(ret == -1){
1701
1351
fprintf(stderr, "init_gnutls_global failed\n");
1702
exitcode = EX_UNAVAILABLE;
1352
exitcode = EXIT_FAILURE;
1703
1353
goto end;
1704
1354
} else {
1705
1355
gnutls_initialized = true;
1709
1359
goto end;
1710
1360
}
1711
1361
1362
tempdir_created = true;
1712
1363
if(mkdtemp(tempdir) == NULL){
1713
perror_plus("mkdtemp");
1364
tempdir_created = false;
1365
perror("mkdtemp");
1714
1366
goto end;
1715
1367
}
1716
tempdir_created = true;
1717
1368
1718
1369
if(quit_now){
1719
1370
goto end;
1721
1372
1722
1373
if(not init_gpgme(pubkey, seckey, tempdir)){
1723
1374
fprintf(stderr, "init_gpgme failed\n");
1724
exitcode = EX_UNAVAILABLE;
1375
exitcode = EXIT_FAILURE;
1725
1376
goto end;
1726
1377
} else {
1727
1378
gpgme_initialized = true;
1737
1388
char *address = strrchr(connect_to, ':');
1738
1389
if(address == NULL){
1739
1390
fprintf(stderr, "No colon in address\n");
1740
exitcode = EX_USAGE;
1391
exitcode = EXIT_FAILURE;
1741
1392
goto end;
1742
1393
}
1743
1394
1751
1402
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1752
1403
or tmpmax != (uint16_t)tmpmax){
1753
1404
fprintf(stderr, "Bad port number\n");
1754
exitcode = EX_USAGE;
1405
exitcode = EXIT_FAILURE;
1755
1406
goto end;
1756
1407
}
1757
1408
1773
1424
if(quit_now){
1774
1425
goto end;
1775
1426
}
1776
1777
while(not quit_now){
1778
ret = start_mandos_communication(address, port, if_index, af);
1779
if(quit_now or ret == 0){
1780
break;
1781
}
1782
sleep((int)retry_interval or 1);
1783
};
1784
1785
if (not quit_now){
1427
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
1786
1432
exitcode = EXIT_SUCCESS;
1787
1433
}
1788
1789
1434
goto end;
1790
1435
}
1791
1436
1815
1460
if(mc.server == NULL){
1816
1461
fprintf(stderr, "Failed to create Avahi server: %s\n",
1817
1462
avahi_strerror(error));
1818
exitcode = EX_UNAVAILABLE;
1463
exitcode = EXIT_FAILURE;
1819
1464
goto end;
1820
1465
}
1821
1466
1830
1475
if(sb == NULL){
1831
1476
fprintf(stderr, "Failed to create service browser: %s\n",
1832
1477
avahi_strerror(avahi_server_errno(mc.server)));
1833
exitcode = EX_UNAVAILABLE;
1478
exitcode = EXIT_FAILURE;
1834
1479
goto end;
1835
1480
}
1836
1481
1843
1488
if(debug){
1844
1489
fprintf(stderr, "Starting Avahi loop search\n");
1845
1490
}
1846
1847
ret = avahi_loop_with_timeout(mc.simple_poll, (int)(retry_interval * 1000));
1848
if(debug){
1849
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1850
(ret == 0) ? "successfully" : "with error");
1851
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
1852
1493
1853
1494
end:
1854
1495
1875
1516
if(gpgme_initialized){
1876
1517
gpgme_release(mc.ctx);
1877
1518
}
1878
1879
/* cleans up the circular linked list of mandos servers the client has seen */
1880
if(mc.current_server != NULL){
1881
mc.current_server->prev->next = NULL;
1882
while(mc.current_server != NULL){
1883
server *next = mc.current_server->next;
1884
free(mc.current_server);
1885
mc.current_server = next;
1886
}
1887
}
1888
1519
1889
1520
/* Take down the network interface */
1890
1521
if(take_down_interface){
1892
1523
errno = 0;
1893
1524
ret = seteuid(0);
1894
1525
if(ret == -1){
1895
perror_plus("seteuid");
1526
perror("seteuid");
1896
1527
}
1897
1528
if(geteuid() == 0){
1898
1529
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1899
1530
if(ret == -1){
1900
perror_plus("ioctl SIOCGIFFLAGS");
1531
perror("ioctl SIOCGIFFLAGS");
1901
1532
} else if(network.ifr_flags & IFF_UP) {
1902
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1903
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1904
1535
if(ret == -1){
1905
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1536
perror("ioctl SIOCSIFFLAGS");
1906
1537
}
1907
1538
}
1908
1539
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1909
1540
if(ret == -1){
1910
perror_plus("close");
1541
perror("close");
1911
1542
}
1912
1543
/* Lower privileges permanently */
1913
1544
errno = 0;
1914
1545
ret = setuid(uid);
1915
1546
if(ret == -1){
1916
perror_plus("setuid");
1547
perror("setuid");
1917
1548
}
1918
1549
}
1919
1550
}
1920
1551
1921
/* Removes the GPGME temp directory and all files inside */
1552
/* Removes the temp directory used by GPGME */
1922
1553
if(tempdir_created){
1923
struct dirent **direntries = NULL;
1924
struct dirent *direntry = NULL;
1925
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1926
if (ret > 0){
1927
for(int i = 0; i < ret; i++){
1928
direntry = direntries[i];
1554
DIR *d;
1555
struct dirent *direntry;
1556
d = opendir(tempdir);
1557
if(d == NULL){
1558
if(errno != ENOENT){
1559
perror("opendir");
1560
}
1561
} else {
1562
while(true){
1563
direntry = readdir(d);
1564
if(direntry == NULL){
1565
break;
1566
}
1567
/* Skip "." and ".." */
1568
if(direntry->d_name[0] == '.'
1569
and (direntry->d_name[1] == '\0'
1570
or (direntry->d_name[1] == '.'
1571
and direntry->d_name[2] == '\0'))){
1572
continue;
1573
}
1929
1574
char *fullname = NULL;
1930
1575
ret = asprintf(&fullname, "%s/%s", tempdir,
1931
1576
direntry->d_name);
1932
1577
if(ret < 0){
1933
perror_plus("asprintf");
1578
perror("asprintf");
1934
1579
continue;
1935
1580
}
1936
1581
ret = remove(fullname);
1940
1585
}
1941
1586
free(fullname);
1942
1587
}
1943
}
1944
1945
/* need to be cleaned even if ret == 0 because man page dont specify */
1946
free(direntries);
1947
if (ret == -1){
1948
perror_plus("scandir");
1588
closedir(d);
1949
1589
}
1950
1590
ret = rmdir(tempdir);
1951
1591
if(ret == -1 and errno != ENOENT){
1952
perror_plus("rmdir");
1592
perror("rmdir");
1953
1593
}
1954
1594
}
1955
1595
1960
1600
&old_sigterm_action,
1961
1601
NULL));
1962
1602
if(ret == -1){
1963
perror_plus("sigaction");
1603
perror("sigaction");
1964
1604
}
1965
1605
do {
1966
1606
ret = raise(signal_received);
1967
1607
} while(ret != 0 and errno == EINTR);
1968
1608
if(ret != 0){
1969
perror_plus("raise");
1609
perror("raise");
1970
1610
abort();
1971
1611
}
1972
1612
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0