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- Committer: Teddy Hogeborn
- Date: 2012-05-26 22:48:45 UTC
- Revision ID: teddy@recompile.se-20120526224845-imaxtrlh3j3yu1ga
* mandos: Change comment.
* mandos-clients.conf.xml (OPTIONS/checker): Rewrote without "you".
(SEE ALSO): Reference fping(8).
* mandos-clients.conf.xml (OPTIONS/checker): Rewrote without "you".
(SEE ALSO): Reference fping(8).
- files added:
- network-hooks.d
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
169
170
170
171
/* Function to use when printing errors */
171
172
void perror_plus(const char *print_text){
173
int e = errno;
172
174
fprintf(stderr, "Mandos plugin %s: ",
173
175
program_invocation_short_name);
176
errno = e;
174
177
perror(print_text);
175
178
}
176
179
180
__attribute__((format (gnu_printf, 2, 3)))
177
181
int fprintf_plus(FILE *stream, const char *format, ...){
178
182
va_list ap;
179
183
va_start (ap, format);
180
184
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
182
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
183
188
}
184
189
200
205
}
201
206
202
207
/* Add server to set of servers to retry periodically */
203
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
204
int af){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
205
210
int ret;
206
211
server *new_server = malloc(sizeof(server));
207
212
if(new_server == NULL){
208
213
perror_plus("malloc");
209
return -1;
214
return false;
210
215
}
211
216
*new_server = (server){ .ip = strdup(ip),
212
217
.port = port,
214
219
.af = af };
215
220
if(new_server->ip == NULL){
216
221
perror_plus("strdup");
217
return -1;
222
return false;
218
223
}
219
224
/* Special case of first server */
220
225
if (mc.current_server == NULL){
231
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
232
237
if(ret == -1){
233
238
perror_plus("clock_gettime");
234
return -1;
239
return false;
235
240
}
236
return 0;
241
return true;
237
242
}
238
243
239
244
/*
262
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
263
268
if(rc != GPG_ERR_NO_ERROR){
264
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
265
gpgme_strsource(rc), gpgme_strerror(rc));
270
gpgme_strsource(rc), gpgme_strerror(rc));
266
271
return false;
267
272
}
268
273
269
274
rc = gpgme_op_import(mc.ctx, pgp_data);
270
275
if(rc != GPG_ERR_NO_ERROR){
271
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
272
gpgme_strsource(rc), gpgme_strerror(rc));
277
gpgme_strsource(rc), gpgme_strerror(rc));
273
278
return false;
274
279
}
275
280
290
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
291
296
if(rc != GPG_ERR_NO_ERROR){
292
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
293
gpgme_strsource(rc), gpgme_strerror(rc));
298
gpgme_strsource(rc), gpgme_strerror(rc));
294
299
return false;
295
300
}
296
301
298
303
rc = gpgme_get_engine_info(&engine_info);
299
304
if(rc != GPG_ERR_NO_ERROR){
300
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
301
gpgme_strsource(rc), gpgme_strerror(rc));
306
gpgme_strsource(rc), gpgme_strerror(rc));
302
307
return false;
303
308
}
304
309
while(engine_info != NULL){
310
315
engine_info = engine_info->next;
311
316
}
312
317
if(engine_info == NULL){
313
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n", tempdir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
314
320
return false;
315
321
}
316
322
318
324
rc = gpgme_new(&(mc.ctx));
319
325
if(rc != GPG_ERR_NO_ERROR){
320
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
321
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
322
gpgme_strerror(rc));
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
323
329
return false;
324
330
}
325
331
352
358
0);
353
359
if(rc != GPG_ERR_NO_ERROR){
354
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
361
gpgme_strsource(rc), gpgme_strerror(rc));
356
362
return -1;
357
363
}
358
364
360
366
rc = gpgme_data_new(&dh_plain);
361
367
if(rc != GPG_ERR_NO_ERROR){
362
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
365
371
gpgme_data_release(dh_crypto);
366
372
return -1;
367
373
}
371
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
378
if(rc != GPG_ERR_NO_ERROR){
373
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
374
gpgme_strsource(rc), gpgme_strerror(rc));
380
gpgme_strsource(rc), gpgme_strerror(rc));
375
381
plaintext_length = -1;
376
382
if(debug){
377
383
gpgme_decrypt_result_t result;
380
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
381
387
} else {
382
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
383
result->unsupported_algorithm);
389
result->unsupported_algorithm);
384
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
385
result->wrong_key_usage);
391
result->wrong_key_usage);
386
392
if(result->file_name != NULL){
387
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
388
394
}
390
396
recipient = result->recipients;
391
397
while(recipient != NULL){
392
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
393
gpgme_pubkey_algo_name(recipient->pubkey_algo));
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
394
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
395
402
fprintf_plus(stderr, "Secret key available: %s\n",
396
recipient->status == GPG_ERR_NO_SECKEY
397
? "No" : "Yes");
403
recipient->status == GPG_ERR_NO_SECKEY
404
? "No" : "Yes");
398
405
recipient = recipient->next;
399
406
}
400
407
}
481
488
482
489
ret = gnutls_global_init();
483
490
if(ret != GNUTLS_E_SUCCESS){
484
fprintf_plus(stderr, "GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
485
493
return -1;
486
494
}
487
495
496
504
/* OpenPGP credentials */
497
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
498
506
if(ret != GNUTLS_E_SUCCESS){
499
fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
500
509
gnutls_global_deinit();
501
510
return -1;
502
511
}
503
512
504
513
if(debug){
505
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
506
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
507
seckeyfilename);
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
508
518
}
509
519
510
520
ret = gnutls_certificate_set_openpgp_key_file
514
524
fprintf_plus(stderr,
515
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
516
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
517
fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
518
529
goto globalfail;
519
530
}
520
531
521
532
/* GnuTLS server initialization */
522
533
ret = gnutls_dh_params_init(&mc.dh_params);
523
534
if(ret != GNUTLS_E_SUCCESS){
524
fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"
525
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
526
538
goto globalfail;
527
539
}
528
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
529
541
if(ret != GNUTLS_E_SUCCESS){
530
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
531
safer_gnutls_strerror(ret));
543
safer_gnutls_strerror(ret));
532
544
goto globalfail;
533
545
}
534
546
554
566
}
555
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
556
568
if(ret != GNUTLS_E_SUCCESS){
557
fprintf_plus(stderr, "Error in GnuTLS session initialization: %s\n",
558
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
559
572
}
560
573
561
574
{
569
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
570
583
if(ret != GNUTLS_E_SUCCESS){
571
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
572
fprintf_plus(stderr, "GnuTLS error: %s\n", safer_gnutls_strerror(ret));
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
573
587
gnutls_deinit(*session);
574
588
return -1;
575
589
}
585
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
586
600
if(ret != GNUTLS_E_SUCCESS){
587
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
588
safer_gnutls_strerror(ret));
602
safer_gnutls_strerror(ret));
589
603
gnutls_deinit(*session);
590
604
return -1;
591
605
}
647
661
}
648
662
649
663
if(debug){
650
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %" PRIu16
651
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
652
666
}
653
667
654
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
693
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
694
708
-Wunreachable-code*/
695
709
if(if_index == AVAHI_IF_UNSPEC){
696
fprintf_plus(stderr, "An IPv6 link-local address is incomplete"
697
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
698
712
errno = EINVAL;
699
713
goto mandos_end;
700
714
}
718
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
719
733
perror_plus("if_indextoname");
720
734
} else {
721
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
722
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
723
737
}
724
738
} else {
725
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
726
741
}
727
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
728
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
806
821
goto mandos_end;
807
822
}
808
823
809
/* Spurious warning from -Wint-to-pointer-cast */
810
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
824
/* This casting via intptr_t is to eliminate warning about casting
825
an int to a pointer type. This is exactly how the GnuTLS Guile
826
function "set-session-transport-fd!" does it. */
827
gnutls_transport_set_ptr(session,
828
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
811
829
812
830
if(quit_now){
813
831
errno = EINTR;
834
852
/* Read OpenPGP packet that contains the wanted password */
835
853
836
854
if(debug){
837
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from %s\n", ip);
855
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
856
" %s\n", ip);
838
857
}
839
858
840
859
while(true){
878
897
}
879
898
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
880
899
if(ret < 0){
881
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed ***\n");
900
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
901
"***\n");
882
902
gnutls_perror(ret);
883
903
errno = EPROTO;
884
904
goto mandos_end;
886
906
break;
887
907
default:
888
908
fprintf_plus(stderr, "Unknown error while reading data from"
889
" encrypted session with Mandos server\n");
909
" encrypted session with Mandos server\n");
890
910
gnutls_bye(session, GNUTLS_SHUT_RDWR);
891
911
errno = EIO;
892
912
goto mandos_end;
933
953
int e = errno;
934
954
if(debug){
935
955
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
936
strerror(errno));
956
strerror(errno));
937
957
}
938
958
errno = e;
939
959
goto mandos_end;
996
1016
switch(event){
997
1017
default:
998
1018
case AVAHI_RESOLVER_FAILURE:
999
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1000
" of type '%s' in domain '%s': %s\n", name, type, domain,
1001
avahi_strerror(avahi_server_errno(mc.server)));
1019
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1020
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1021
domain,
1022
avahi_strerror(avahi_server_errno(mc.server)));
1002
1023
break;
1003
1024
1004
1025
case AVAHI_RESOLVER_FOUND:
1007
1028
avahi_address_snprint(ip, sizeof(ip), address);
1008
1029
if(debug){
1009
1030
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1010
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1011
ip, (intmax_t)interface, port);
1031
PRIdMAX ") on port %" PRIu16 "\n", name,
1032
host_name, ip, (intmax_t)interface, port);
1012
1033
}
1013
1034
int ret = start_mandos_communication(ip, port, interface,
1014
1035
avahi_proto_to_af(proto));
1015
1036
if(ret == 0){
1016
1037
avahi_simple_poll_quit(mc.simple_poll);
1017
1038
} else {
1018
ret = add_server(ip, port, interface,
1019
avahi_proto_to_af(proto));
1039
if(not add_server(ip, port, interface,
1040
avahi_proto_to_af(proto))){
1041
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1042
" list\n", name);
1043
}
1020
1044
}
1021
1045
}
1022
1046
}
1047
1071
case AVAHI_BROWSER_FAILURE:
1048
1072
1049
1073
fprintf_plus(stderr, "(Avahi browser) %s\n",
1050
avahi_strerror(avahi_server_errno(mc.server)));
1074
avahi_strerror(avahi_server_errno(mc.server)));
1051
1075
avahi_simple_poll_quit(mc.simple_poll);
1052
1076
return;
1053
1077
1060
1084
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1061
1085
name, type, domain, protocol, 0,
1062
1086
resolve_callback, NULL) == NULL)
1063
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1064
name, avahi_strerror(avahi_server_errno(mc.server)));
1087
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1088
" %s\n", name,
1089
avahi_strerror(avahi_server_errno(mc.server)));
1065
1090
break;
1066
1091
1067
1092
case AVAHI_BROWSER_REMOVE:
1070
1095
case AVAHI_BROWSER_ALL_FOR_NOW:
1071
1096
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1072
1097
if(debug){
1073
fprintf_plus(stderr, "No Mandos server found, still searching...\n");
1098
fprintf_plus(stderr, "No Mandos server found, still"
1099
" searching...\n");
1074
1100
}
1075
1101
break;
1076
1102
}
1115
1141
/* Reject the loopback device */
1116
1142
if(ifr->ifr_flags & IFF_LOOPBACK){
1117
1143
if(debug){
1118
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);
1144
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1145
ifname);
1119
1146
}
1120
1147
return false;
1121
1148
}
1122
1149
/* Accept point-to-point devices only if connect_to is specified */
1123
1150
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1124
1151
if(debug){
1125
fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);
1152
fprintf_plus(stderr, "Accepting point-to-point interface"
1153
" \"%s\"\n", ifname);
1126
1154
}
1127
1155
return true;
1128
1156
}
1129
1157
/* Otherwise, reject non-broadcast-capable devices */
1130
1158
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1131
1159
if(debug){
1132
fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);
1160
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1161
" \"%s\"\n", ifname);
1133
1162
}
1134
1163
return false;
1135
1164
}
1136
1165
/* Reject non-ARP interfaces (including dummy interfaces) */
1137
1166
if(ifr->ifr_flags & IFF_NOARP){
1138
1167
if(debug){
1139
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1168
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1169
ifname);
1140
1170
}
1141
1171
return false;
1142
1172
}
1161
1191
struct ifreq ifr;
1162
1192
if(not get_flags(if_entry->d_name, &ifr)){
1163
1193
if(debug){
1164
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1165
if_entry->d_name);
1194
fprintf_plus(stderr, "Failed to get flags for interface "
1195
"\"%s\"\n", if_entry->d_name);
1166
1196
}
1167
1197
return 0;
1168
1198
}
1186
1216
struct ifreq ifr;
1187
1217
if(not get_flags(if_entry->d_name, &ifr)){
1188
1218
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1190
if_entry->d_name);
1219
fprintf_plus(stderr, "Failed to get flags for interface "
1220
"\"%s\"\n", if_entry->d_name);
1191
1221
}
1192
1222
return 0;
1193
1223
}
1196
1226
if(not (ifr.ifr_flags & IFF_UP)){
1197
1227
if(debug){
1198
1228
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1199
if_entry->d_name);
1229
if_entry->d_name);
1200
1230
}
1201
1231
return 0;
1202
1232
}
1205
1235
if(not (ifr.ifr_flags & IFF_RUNNING)){
1206
1236
if(debug){
1207
1237
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1208
if_entry->d_name);
1238
if_entry->d_name);
1209
1239
}
1210
1240
return 0;
1211
1241
}
1246
1276
/* Contains non-allowed characters */
1247
1277
if(debug){
1248
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1249
direntry->d_name);
1279
direntry->d_name);
1250
1280
}
1251
1281
return 0;
1252
1282
}
1269
1299
/* Not a regular file */
1270
1300
if(debug){
1271
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1272
direntry->d_name);
1302
direntry->d_name);
1273
1303
}
1274
1304
return 0;
1275
1305
}
1277
1307
/* Not executable */
1278
1308
if(debug){
1279
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1280
direntry->d_name);
1310
direntry->d_name);
1281
1311
}
1282
1312
return 0;
1283
1313
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1284
1318
return 1;
1285
1319
}
1286
1320
1293
1327
while(true){
1294
1328
if(mc.current_server == NULL){
1295
1329
if (debug){
1296
fprintf_plus(stderr, "Wait until first server is found. No timeout!\n");
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1297
1332
}
1298
1333
ret = avahi_simple_poll_iterate(s, -1);
1299
1334
} else {
1300
1335
if (debug){
1301
fprintf_plus(stderr, "Check current_server if we should run it,"
1302
" or wait\n");
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1303
1338
}
1304
1339
/* the current time */
1305
1340
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1321
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1322
1357
1323
1358
if (debug){
1324
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1325
1361
}
1326
1362
1327
1363
if(block_time <= 0){
1354
1390
}
1355
1391
}
1356
1392
1393
bool run_network_hooks(const char *mode, const char *interface,
1394
const float delay){
1395
struct dirent **direntries;
1396
struct dirent *direntry;
1397
int ret;
1398
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1399
alphasort);
1400
if(numhooks == -1){
1401
perror_plus("scandir");
1402
} else {
1403
int devnull = open("/dev/null", O_RDONLY);
1404
for(int i = 0; i < numhooks; i++){
1405
direntry = direntries[i];
1406
char *fullname = NULL;
1407
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1408
if(ret < 0){
1409
perror_plus("asprintf");
1410
continue;
1411
}
1412
if(debug){
1413
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1414
direntry->d_name);
1415
}
1416
pid_t hook_pid = fork();
1417
if(hook_pid == 0){
1418
/* Child */
1419
/* Raise privileges */
1420
errno = 0;
1421
ret = seteuid(0);
1422
if(ret == -1){
1423
perror_plus("seteuid");
1424
}
1425
/* Raise privileges even more */
1426
errno = 0;
1427
ret = setuid(0);
1428
if(ret == -1){
1429
perror_plus("setuid");
1430
}
1431
/* Set group */
1432
errno = 0;
1433
ret = setgid(0);
1434
if(ret == -1){
1435
perror_plus("setgid");
1436
}
1437
/* Reset supplementary groups */
1438
errno = 0;
1439
ret = setgroups(0, NULL);
1440
if(ret == -1){
1441
perror_plus("setgroups");
1442
}
1443
dup2(devnull, STDIN_FILENO);
1444
close(devnull);
1445
dup2(STDERR_FILENO, STDOUT_FILENO);
1446
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("DEVICE", interface, 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
ret = setenv("MODE", mode, 1);
1462
if(ret == -1){
1463
perror_plus("setenv");
1464
_exit(EX_OSERR);
1465
}
1466
char *delaystring;
1467
ret = asprintf(&delaystring, "%f", delay);
1468
if(ret == -1){
1469
perror_plus("asprintf");
1470
_exit(EX_OSERR);
1471
}
1472
ret = setenv("DELAY", delaystring, 1);
1473
if(ret == -1){
1474
free(delaystring);
1475
perror_plus("setenv");
1476
_exit(EX_OSERR);
1477
}
1478
free(delaystring);
1479
if(connect_to != NULL){
1480
ret = setenv("CONNECT", connect_to, 1);
1481
if(ret == -1){
1482
perror_plus("setenv");
1483
_exit(EX_OSERR);
1484
}
1485
}
1486
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1487
perror_plus("execl");
1488
_exit(EXIT_FAILURE);
1489
}
1490
} else {
1491
int status;
1492
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1493
perror_plus("waitpid");
1494
free(fullname);
1495
continue;
1496
}
1497
if(WIFEXITED(status)){
1498
if(WEXITSTATUS(status) != 0){
1499
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1500
" with status %d\n", direntry->d_name,
1501
WEXITSTATUS(status));
1502
free(fullname);
1503
continue;
1504
}
1505
} else if(WIFSIGNALED(status)){
1506
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1507
" signal %d\n", direntry->d_name,
1508
WTERMSIG(status));
1509
free(fullname);
1510
continue;
1511
} else {
1512
fprintf_plus(stderr, "Warning: network hook \"%s\""
1513
" crashed\n", direntry->d_name);
1514
free(fullname);
1515
continue;
1516
}
1517
}
1518
free(fullname);
1519
if(debug){
1520
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1521
direntry->d_name);
1522
}
1523
}
1524
close(devnull);
1525
}
1526
return true;
1527
}
1528
1357
1529
int main(int argc, char *argv[]){
1358
1530
AvahiSServiceBrowser *sb = NULL;
1359
1531
int error;
1439
1611
.group = 2 },
1440
1612
{ .name = "retry", .key = 132,
1441
1613
.arg = "SECONDS",
1442
.doc = "Retry interval used when denied by the mandos server",
1614
.doc = "Retry interval used when denied by the Mandos server",
1443
1615
.group = 2 },
1444
1616
{ .name = "network-hook-dir", .key = 133,
1445
1617
.arg = "DIR",
1517
1689
argp_state_help(state, state->out_stream,
1518
1690
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1519
1691
case 'V': /* --version */
1520
fprintf_plus(state->out_stream, "Mandos plugin mandos-client: ");
1521
1692
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1522
1693
exit(argp_err_exit_status);
1523
1694
break;
1551
1722
{
1552
1723
/* Work around Debian bug #633582:
1553
1724
<http://bugs.debian.org/633582> */
1554
struct stat st;
1555
1725
1556
1726
/* Re-raise priviliges */
1557
1727
errno = 0;
1558
1728
ret = seteuid(0);
1559
1729
if(ret == -1){
1560
1730
perror_plus("seteuid");
1561
}
1562
1563
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1564
int seckey_fd = open(seckey, O_RDONLY);
1565
if(seckey_fd == -1){
1566
perror_plus("open");
1567
} else {
1568
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1569
if(ret == -1){
1570
perror_plus("fstat");
1571
} else {
1572
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1573
ret = fchown(seckey_fd, uid, gid);
1574
if(ret == -1){
1575
perror_plus("fchown");
1576
}
1577
}
1578
}
1579
TEMP_FAILURE_RETRY(close(seckey_fd));
1580
}
1581
}
1582
1583
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1584
int pubkey_fd = open(pubkey, O_RDONLY);
1585
if(pubkey_fd == -1){
1586
perror_plus("open");
1587
} else {
1588
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1589
if(ret == -1){
1590
perror_plus("fstat");
1591
} else {
1592
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1593
ret = fchown(pubkey_fd, uid, gid);
1594
if(ret == -1){
1595
perror_plus("fchown");
1596
}
1597
}
1598
}
1599
TEMP_FAILURE_RETRY(close(pubkey_fd));
1600
}
1601
}
1602
1603
/* Lower privileges */
1604
errno = 0;
1605
ret = seteuid(uid);
1606
if(ret == -1){
1607
perror_plus("seteuid");
1608
}
1609
}
1610
1611
/* Find network hooks and run them */
1612
{
1613
struct dirent **direntries;
1614
struct dirent *direntry;
1615
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1616
alphasort);
1617
if(numhooks == -1){
1618
perror_plus("scandir");
1619
1731
} else {
1620
int devnull = open("/dev/null", O_RDONLY);
1621
for(int i = 0; i < numhooks; i++){
1622
direntry = direntries[0];
1623
char *fullname = NULL;
1624
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1625
if(ret < 0){
1626
perror_plus("asprintf");
1627
continue;
1628
}
1629
pid_t hook_pid = fork();
1630
if(hook_pid == 0){
1631
/* Child */
1632
dup2(devnull, STDIN_FILENO);
1633
close(devnull);
1634
dup2(STDERR_FILENO, STDOUT_FILENO);
1635
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1636
if(ret == -1){
1637
perror_plus("setenv");
1638
exit(1);
1639
}
1640
ret = setenv("DEVICE", interface, 1);
1641
if(ret == -1){
1642
perror_plus("setenv");
1643
exit(1);
1644
}
1645
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1646
if(ret == -1){
1647
perror_plus("setenv");
1648
exit(1);
1649
}
1650
ret = setenv("MODE", "start", 1);
1651
if(ret == -1){
1652
perror_plus("setenv");
1653
exit(1);
1654
}
1655
char *delaystring;
1656
ret = asprintf(&delaystring, "%f", delay);
1657
if(ret == -1){
1658
perror_plus("asprintf");
1659
exit(1);
1660
}
1661
ret = setenv("DELAY", delaystring, 1);
1662
if(ret == -1){
1663
free(delaystring);
1664
perror_plus("setenv");
1665
exit(1);
1666
}
1667
free(delaystring);
1668
ret = execl(fullname, direntry->d_name, "start", NULL);
1669
perror_plus("execl");
1670
} else {
1671
int status;
1672
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1673
perror_plus("waitpid");
1674
free(fullname);
1675
continue;
1676
}
1677
if(WIFEXITED(status)){
1678
if(WEXITSTATUS(status) != 0){
1679
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1680
" with status %d\n", direntry->d_name,
1681
WEXITSTATUS(status));
1682
free(fullname);
1683
continue;
1684
}
1685
} else if(WIFSIGNALED(status)){
1686
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1687
" signal %d\n", direntry->d_name,
1688
WTERMSIG(status));
1689
free(fullname);
1690
continue;
1691
} else {
1692
fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",
1693
direntry->d_name);
1694
free(fullname);
1695
continue;
1696
}
1697
}
1698
free(fullname);
1699
if(quit_now){
1700
goto end;
1701
}
1702
}
1703
close(devnull);
1732
struct stat st;
1733
1734
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1735
int seckey_fd = open(seckey, O_RDONLY);
1736
if(seckey_fd == -1){
1737
perror_plus("open");
1738
} else {
1739
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1740
if(ret == -1){
1741
perror_plus("fstat");
1742
} else {
1743
if(S_ISREG(st.st_mode)
1744
and st.st_uid == 0 and st.st_gid == 0){
1745
ret = fchown(seckey_fd, uid, gid);
1746
if(ret == -1){
1747
perror_plus("fchown");
1748
}
1749
}
1750
}
1751
TEMP_FAILURE_RETRY(close(seckey_fd));
1752
}
1753
}
1754
1755
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1756
int pubkey_fd = open(pubkey, O_RDONLY);
1757
if(pubkey_fd == -1){
1758
perror_plus("open");
1759
} else {
1760
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1761
if(ret == -1){
1762
perror_plus("fstat");
1763
} else {
1764
if(S_ISREG(st.st_mode)
1765
and st.st_uid == 0 and st.st_gid == 0){
1766
ret = fchown(pubkey_fd, uid, gid);
1767
if(ret == -1){
1768
perror_plus("fchown");
1769
}
1770
}
1771
}
1772
TEMP_FAILURE_RETRY(close(pubkey_fd));
1773
}
1774
}
1775
1776
/* Lower privileges */
1777
errno = 0;
1778
ret = seteuid(uid);
1779
if(ret == -1){
1780
perror_plus("seteuid");
1781
}
1704
1782
}
1705
1783
}
1706
1784
1785
/* Run network hooks */
1786
if(not run_network_hooks("start", interface, delay)){
1787
goto end;
1788
}
1789
1707
1790
if(not debug){
1708
1791
avahi_set_log_function(empty_log);
1709
1792
}
1746
1829
srand((unsigned int) time(NULL));
1747
1830
mc.simple_poll = avahi_simple_poll_new();
1748
1831
if(mc.simple_poll == NULL){
1749
fprintf_plus(stderr, "Avahi: Failed to create simple poll object.\n");
1832
fprintf_plus(stderr,
1833
"Avahi: Failed to create simple poll object.\n");
1750
1834
exitcode = EX_UNAVAILABLE;
1751
1835
goto end;
1752
1836
}
1944
2028
#endif /* __linux__ */
1945
2029
/* Lower privileges */
1946
2030
errno = 0;
1947
if(take_down_interface){
1948
/* Lower privileges */
1949
ret = seteuid(uid);
1950
if(ret == -1){
1951
perror_plus("seteuid");
1952
}
1953
} else {
1954
/* Lower privileges permanently */
1955
ret = setuid(uid);
1956
if(ret == -1){
1957
perror_plus("setuid");
1958
}
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
1959
2035
}
1960
2036
}
1961
2037
2053
2129
break;
2054
2130
}
2055
2131
if(debug){
2056
fprintf_plus(stderr, "Retrying in %d seconds\n", (int)retry_interval);
2132
fprintf_plus(stderr, "Retrying in %d seconds\n",
2133
(int)retry_interval);
2057
2134
}
2058
2135
sleep((int)retry_interval);
2059
2136
}
2090
2167
/* Check if creating the Avahi server object succeeded */
2091
2168
if(mc.server == NULL){
2092
2169
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2093
avahi_strerror(error));
2170
avahi_strerror(error));
2094
2171
exitcode = EX_UNAVAILABLE;
2095
2172
goto end;
2096
2173
}
2105
2182
NULL, 0, browse_callback, NULL);
2106
2183
if(sb == NULL){
2107
2184
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2108
avahi_strerror(avahi_server_errno(mc.server)));
2185
avahi_strerror(avahi_server_errno(mc.server)));
2109
2186
exitcode = EX_UNAVAILABLE;
2110
2187
goto end;
2111
2188
}
2124
2201
(int)(retry_interval * 1000));
2125
2202
if(debug){
2126
2203
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2127
(ret == 0) ? "successfully" : "with error");
2204
(ret == 0) ? "successfully" : "with error");
2128
2205
}
2129
2206
2130
2207
end:
2152
2229
if(gpgme_initialized){
2153
2230
gpgme_release(mc.ctx);
2154
2231
}
2155
2232
2156
2233
/* Cleans up the circular linked list of Mandos servers the client
2157
2234
has seen */
2158
2235
if(mc.current_server != NULL){
2164
2241
}
2165
2242
}
2166
2243
2167
/* XXX run network hooks "stop" here */
2244
/* Run network hooks */
2245
run_network_hooks("stop", interface, delay);
2168
2246
2169
/* Take down the network interface */
2170
if(take_down_interface){
2171
/* Re-raise priviliges */
2247
/* Re-raise priviliges */
2248
{
2172
2249
errno = 0;
2173
2250
ret = seteuid(0);
2174
2251
if(ret == -1){
2175
2252
perror_plus("seteuid");
2176
2253
}
2177
if(geteuid() == 0){
2254
2255
/* Take down the network interface */
2256
if(take_down_interface and geteuid() == 0){
2178
2257
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2179
2258
if(ret == -1){
2180
2259
perror_plus("ioctl SIOCGIFFLAGS");
2189
2268
if(ret == -1){
2190
2269
perror_plus("close");
2191
2270
}
2192
/* Lower privileges permanently */
2193
errno = 0;
2194
ret = setuid(uid);
2195
if(ret == -1){
2196
perror_plus("setuid");
2197
}
2198
2271
}
2199
2272
}
2273
/* Lower privileges permanently */
2274
errno = 0;
2275
ret = setuid(uid);
2276
if(ret == -1){
2277
perror_plus("setuid");
2278
}
2200
2279
2201
2280
/* Removes the GPGME temp directory and all files inside */
2202
2281
if(tempdir_created){
2216
2295
}
2217
2296
ret = remove(fullname);
2218
2297
if(ret == -1){
2219
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname, strerror(errno));
2298
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2299
strerror(errno));
2220
2300
}
2221
2301
free(fullname);
2222
2302
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0