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- Committer: Björn Påhlsson
- Date: 2011-11-14 18:32:54 UTC
- mfrom: (505.3.7 client-network-hooks)
- mto: (505.3.9 client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: belorn@fukt.bsnet.se-20111114183254-ujkmu680jli1w3yd
merge
- files removed:
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 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
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
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() */
91
90
92
91
#ifdef __linux__
93
92
#include <sys/klog.h> /* klogctl() */
170
169
171
170
/* Function to use when printing errors */
172
171
void perror_plus(const char *print_text){
173
int e = errno;
174
172
fprintf(stderr, "Mandos plugin %s: ",
175
173
program_invocation_short_name);
176
errno = e;
177
174
perror(print_text);
178
175
}
179
176
180
__attribute__((format (gnu_printf, 2, 3)))
181
177
int fprintf_plus(FILE *stream, const char *format, ...){
182
178
va_list ap;
183
179
va_start (ap, format);
184
180
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
187
182
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
183
}
189
184
205
200
}
206
201
207
202
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
203
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
204
int af){
210
205
int ret;
211
206
server *new_server = malloc(sizeof(server));
212
207
if(new_server == NULL){
213
208
perror_plus("malloc");
214
return false;
209
return -1;
215
210
}
216
211
*new_server = (server){ .ip = strdup(ip),
217
212
.port = port,
219
214
.af = af };
220
215
if(new_server->ip == NULL){
221
216
perror_plus("strdup");
222
return false;
217
return -1;
223
218
}
224
219
/* Special case of first server */
225
220
if (mc.current_server == NULL){
236
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
237
232
if(ret == -1){
238
233
perror_plus("clock_gettime");
239
return false;
234
return -1;
240
235
}
241
return true;
236
return 0;
242
237
}
243
238
244
239
/*
266
261
267
262
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
263
if(rc != GPG_ERR_NO_ERROR){
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
271
267
return false;
272
268
}
273
269
274
270
rc = gpgme_op_import(mc.ctx, pgp_data);
275
271
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf(stderr, "Mandos plugin mandos-client: "
273
"bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
278
275
return false;
279
276
}
280
277
287
284
}
288
285
289
286
if(debug){
290
fprintf_plus(stderr, "Initializing GPGME\n");
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"Initializing GPGME\n");
291
289
}
292
290
293
291
/* Init GPGME */
294
292
gpgme_check_version(NULL);
295
293
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
296
294
if(rc != GPG_ERR_NO_ERROR){
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
295
fprintf(stderr, "Mandos plugin mandos-client: "
296
"bad gpgme_engine_check_version: %s: %s\n",
297
gpgme_strsource(rc), gpgme_strerror(rc));
299
298
return false;
300
299
}
301
300
302
301
/* Set GPGME home directory for the OpenPGP engine only */
303
302
rc = gpgme_get_engine_info(&engine_info);
304
303
if(rc != GPG_ERR_NO_ERROR){
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
304
fprintf(stderr, "Mandos plugin mandos-client: "
305
"bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
307
307
return false;
308
308
}
309
309
while(engine_info != NULL){
315
315
engine_info = engine_info->next;
316
316
}
317
317
if(engine_info == NULL){
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"Could not set GPGME home dir to %s\n", tempdir);
320
320
return false;
321
321
}
322
322
323
323
/* Create new GPGME "context" */
324
324
rc = gpgme_new(&(mc.ctx));
325
325
if(rc != GPG_ERR_NO_ERROR){
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
326
fprintf(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
329
329
return false;
330
330
}
331
331
350
350
ssize_t plaintext_length = 0;
351
351
352
352
if(debug){
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"Trying to decrypt OpenPGP data\n");
354
355
}
355
356
356
357
/* Create new GPGME data buffer from memory cryptotext */
357
358
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
358
359
0);
359
360
if(rc != GPG_ERR_NO_ERROR){
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
361
fprintf(stderr, "Mandos plugin mandos-client: "
362
"bad gpgme_data_new_from_mem: %s: %s\n",
363
gpgme_strsource(rc), gpgme_strerror(rc));
362
364
return -1;
363
365
}
364
366
365
367
/* Create new empty GPGME data buffer for the plaintext */
366
368
rc = gpgme_data_new(&dh_plain);
367
369
if(rc != GPG_ERR_NO_ERROR){
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
370
fprintf(stderr, "Mandos plugin mandos-client: "
371
"bad gpgme_data_new: %s: %s\n",
372
gpgme_strsource(rc), gpgme_strerror(rc));
371
373
gpgme_data_release(dh_crypto);
372
374
return -1;
373
375
}
376
378
data buffer */
377
379
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
378
380
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
381
384
plaintext_length = -1;
382
385
if(debug){
383
386
gpgme_decrypt_result_t result;
384
387
result = gpgme_op_decrypt_result(mc.ctx);
385
388
if(result == NULL){
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
389
fprintf(stderr, "Mandos plugin mandos-client: "
390
"gpgme_op_decrypt_result failed\n");
387
391
} else {
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"Unsupported algorithm: %s\n",
394
result->unsupported_algorithm);
395
fprintf(stderr, "Mandos plugin mandos-client: "
396
"Wrong key usage: %u\n",
397
result->wrong_key_usage);
392
398
if(result->file_name != NULL){
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
399
fprintf(stderr, "Mandos plugin mandos-client: "
400
"File name: %s\n", result->file_name);
394
401
}
395
402
gpgme_recipient_t recipient;
396
403
recipient = result->recipients;
397
404
while(recipient != NULL){
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
404
? "No" : "Yes");
405
fprintf(stderr, "Mandos plugin mandos-client: "
406
"Public key algorithm: %s\n",
407
gpgme_pubkey_algo_name(recipient->pubkey_algo));
408
fprintf(stderr, "Mandos plugin mandos-client: "
409
"Key ID: %s\n", recipient->keyid);
410
fprintf(stderr, "Mandos plugin mandos-client: "
411
"Secret key available: %s\n",
412
recipient->status == GPG_ERR_NO_SECKEY
413
? "No" : "Yes");
405
414
recipient = recipient->next;
406
415
}
407
416
}
410
419
}
411
420
412
421
if(debug){
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
422
fprintf(stderr, "Mandos plugin mandos-client: "
423
"Decryption of OpenPGP data succeeded\n");
414
424
}
415
425
416
426
/* Seek back to the beginning of the GPGME plaintext data buffer */
447
457
}
448
458
449
459
if(debug){
450
fprintf_plus(stderr, "Decrypted password is: ");
460
fprintf(stderr, "Mandos plugin mandos-client: "
461
"Decrypted password is: ");
451
462
for(ssize_t i = 0; i < plaintext_length; i++){
452
463
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
453
464
}
475
486
/* GnuTLS log function callback */
476
487
static void debuggnutls(__attribute__((unused)) int level,
477
488
const char* string){
478
fprintf_plus(stderr, "GnuTLS: %s", string);
489
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
479
490
}
480
491
481
492
static int init_gnutls_global(const char *pubkeyfilename,
483
494
int ret;
484
495
485
496
if(debug){
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
497
fprintf(stderr, "Mandos plugin mandos-client: "
498
"Initializing GnuTLS\n");
487
499
}
488
500
489
501
ret = gnutls_global_init();
490
502
if(ret != GNUTLS_E_SUCCESS){
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
503
fprintf(stderr, "Mandos plugin mandos-client: "
504
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
493
505
return -1;
494
506
}
495
507
504
516
/* OpenPGP credentials */
505
517
ret = gnutls_certificate_allocate_credentials(&mc.cred);
506
518
if(ret != GNUTLS_E_SUCCESS){
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
509
521
gnutls_global_deinit();
510
522
return -1;
511
523
}
512
524
513
525
if(debug){
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
526
fprintf(stderr, "Mandos plugin mandos-client: "
527
"Attempting to use OpenPGP public key %s and"
528
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
529
seckeyfilename);
518
530
}
519
531
520
532
ret = gnutls_certificate_set_openpgp_key_file
521
533
(mc.cred, pubkeyfilename, seckeyfilename,
522
534
GNUTLS_OPENPGP_FMT_BASE64);
523
535
if(ret != GNUTLS_E_SUCCESS){
524
fprintf_plus(stderr,
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
536
fprintf(stderr,
537
"Mandos plugin mandos-client: "
538
"Error[%d] while reading the OpenPGP key pair ('%s',"
539
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
529
542
goto globalfail;
530
543
}
531
544
532
545
/* GnuTLS server initialization */
533
546
ret = gnutls_dh_params_init(&mc.dh_params);
534
547
if(ret != GNUTLS_E_SUCCESS){
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS DH parameter initialization:"
550
" %s\n", safer_gnutls_strerror(ret));
538
551
goto globalfail;
539
552
}
540
553
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
541
554
if(ret != GNUTLS_E_SUCCESS){
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
555
fprintf(stderr, "Mandos plugin mandos-client: "
556
"Error in GnuTLS prime generation: %s\n",
557
safer_gnutls_strerror(ret));
544
558
goto globalfail;
545
559
}
546
560
566
580
}
567
581
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
568
582
if(ret != GNUTLS_E_SUCCESS){
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
583
fprintf(stderr, "Mandos plugin mandos-client: "
584
"Error in GnuTLS session initialization: %s\n",
585
safer_gnutls_strerror(ret));
572
586
}
573
587
574
588
{
581
595
}
582
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
583
597
if(ret != GNUTLS_E_SUCCESS){
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
598
fprintf(stderr, "Mandos plugin mandos-client: "
599
"Syntax error at: %s\n", err);
600
fprintf(stderr, "Mandos plugin mandos-client: "
601
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
587
602
gnutls_deinit(*session);
588
603
return -1;
589
604
}
598
613
}
599
614
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
600
615
if(ret != GNUTLS_E_SUCCESS){
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
616
fprintf(stderr, "Mandos plugin mandos-client: "
617
"Error setting GnuTLS credentials: %s\n",
618
safer_gnutls_strerror(ret));
603
619
gnutls_deinit(*session);
604
620
return -1;
605
621
}
650
666
pf = PF_INET;
651
667
break;
652
668
default:
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
669
fprintf(stderr, "Mandos plugin mandos-client: "
670
"Bad address family: %d\n", af);
654
671
errno = EINVAL;
655
672
return -1;
656
673
}
661
678
}
662
679
663
680
if(debug){
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
681
fprintf(stderr, "Mandos plugin mandos-client: "
682
"Setting up a TCP connection to %s, port %" PRIu16
683
"\n", ip, port);
666
684
}
667
685
668
686
tcp_sd = socket(pf, SOCK_STREAM, 0);
694
712
}
695
713
if(ret == 0){
696
714
int e = errno;
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
715
fprintf(stderr, "Mandos plugin mandos-client: "
716
"Bad address: %s\n", ip);
698
717
errno = e;
699
718
goto mandos_end;
700
719
}
707
726
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
708
727
-Wunreachable-code*/
709
728
if(if_index == AVAHI_IF_UNSPEC){
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
729
fprintf(stderr, "Mandos plugin mandos-client: "
730
"An IPv6 link-local address is incomplete"
731
" without a network interface\n");
712
732
errno = EINVAL;
713
733
goto mandos_end;
714
734
}
732
752
if(if_indextoname((unsigned int)if_index, interface) == NULL){
733
753
perror_plus("if_indextoname");
734
754
} else {
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
755
fprintf(stderr, "Mandos plugin mandos-client: "
756
"Connection to: %s%%%s, port %" PRIu16 "\n",
757
ip, interface, port);
737
758
}
738
759
} else {
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
760
fprintf(stderr, "Mandos plugin mandos-client: "
761
"Connection to: %s, port %" PRIu16 "\n", ip, port);
741
762
}
742
763
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
743
764
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
753
774
perror_plus("inet_ntop");
754
775
} else {
755
776
if(strcmp(addrstr, ip) != 0){
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
777
fprintf(stderr, "Mandos plugin mandos-client: "
778
"Canonical address form: %s\n", addrstr);
757
779
}
758
780
}
759
781
}
813
835
}
814
836
815
837
if(debug){
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
838
fprintf(stderr, "Mandos plugin mandos-client: "
839
"Establishing TLS session with %s\n", ip);
817
840
}
818
841
819
842
if(quit_now){
839
862
840
863
if(ret != GNUTLS_E_SUCCESS){
841
864
if(debug){
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
865
fprintf(stderr, "Mandos plugin mandos-client: "
866
"*** GnuTLS Handshake failed ***\n");
843
867
gnutls_perror(ret);
844
868
}
845
869
errno = EPROTO;
849
873
/* Read OpenPGP packet that contains the wanted password */
850
874
851
875
if(debug){
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
876
fprintf(stderr, "Mandos plugin mandos-client: "
877
"Retrieving OpenPGP encrypted password from %s\n", ip);
854
878
}
855
879
856
880
while(true){
894
918
}
895
919
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
896
920
if(ret < 0){
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"*** GnuTLS Re-handshake failed ***\n");
899
923
gnutls_perror(ret);
900
924
errno = EPROTO;
901
925
goto mandos_end;
902
926
}
903
927
break;
904
928
default:
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
929
fprintf(stderr, "Mandos plugin mandos-client: "
930
"Unknown error while reading data from"
931
" encrypted session with Mandos server\n");
907
932
gnutls_bye(session, GNUTLS_SHUT_RDWR);
908
933
errno = EIO;
909
934
goto mandos_end;
914
939
}
915
940
916
941
if(debug){
917
fprintf_plus(stderr, "Closing TLS session\n");
942
fprintf(stderr, "Mandos plugin mandos-client: "
943
"Closing TLS session\n");
918
944
}
919
945
920
946
if(quit_now){
949
975
if(ret == 0 and ferror(stdout)){
950
976
int e = errno;
951
977
if(debug){
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
978
fprintf(stderr, "Mandos plugin mandos-client: "
979
"Error writing encrypted data: %s\n",
980
strerror(errno));
954
981
}
955
982
errno = e;
956
983
goto mandos_end;
1013
1040
switch(event){
1014
1041
default:
1015
1042
case AVAHI_RESOLVER_FAILURE:
1016
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1017
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1018
domain,
1019
avahi_strerror(avahi_server_errno(mc.server)));
1043
fprintf(stderr, "Mandos plugin mandos-client: "
1044
"(Avahi Resolver) Failed to resolve service '%s'"
1045
" of type '%s' in domain '%s': %s\n", name, type, domain,
1046
avahi_strerror(avahi_server_errno(mc.server)));
1020
1047
break;
1021
1048
1022
1049
case AVAHI_RESOLVER_FOUND:
1024
1051
char ip[AVAHI_ADDRESS_STR_MAX];
1025
1052
avahi_address_snprint(ip, sizeof(ip), address);
1026
1053
if(debug){
1027
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1028
PRIdMAX ") on port %" PRIu16 "\n", name,
1029
host_name, ip, (intmax_t)interface, port);
1054
fprintf(stderr, "Mandos plugin mandos-client: "
1055
"Mandos server \"%s\" found on %s (%s, %"
1056
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1057
ip, (intmax_t)interface, port);
1030
1058
}
1031
1059
int ret = start_mandos_communication(ip, port, interface,
1032
1060
avahi_proto_to_af(proto));
1033
1061
if(ret == 0){
1034
1062
avahi_simple_poll_quit(mc.simple_poll);
1035
1063
} else {
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1039
" list\n", name);
1040
}
1064
ret = add_server(ip, port, interface,
1065
avahi_proto_to_af(proto));
1041
1066
}
1042
1067
}
1043
1068
}
1067
1092
default:
1068
1093
case AVAHI_BROWSER_FAILURE:
1069
1094
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
avahi_strerror(avahi_server_errno(mc.server)));
1095
fprintf(stderr, "Mandos plugin mandos-client: "
1096
"(Avahi browser) %s\n",
1097
avahi_strerror(avahi_server_errno(mc.server)));
1072
1098
avahi_simple_poll_quit(mc.simple_poll);
1073
1099
return;
1074
1100
1081
1107
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1082
1108
name, type, domain, protocol, 0,
1083
1109
resolve_callback, NULL) == NULL)
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1085
" %s\n", name,
1086
avahi_strerror(avahi_server_errno(mc.server)));
1110
fprintf(stderr, "Mandos plugin mandos-client: "
1111
"Avahi: Failed to resolve service '%s': %s\n",
1112
name, avahi_strerror(avahi_server_errno(mc.server)));
1087
1113
break;
1088
1114
1089
1115
case AVAHI_BROWSER_REMOVE:
1092
1118
case AVAHI_BROWSER_ALL_FOR_NOW:
1093
1119
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1094
1120
if(debug){
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1121
fprintf(stderr, "Mandos plugin mandos-client: "
1122
"No Mandos server found, still searching...\n");
1097
1123
}
1098
1124
break;
1099
1125
}
1138
1164
/* Reject the loopback device */
1139
1165
if(ifr->ifr_flags & IFF_LOOPBACK){
1140
1166
if(debug){
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Rejecting loopback interface \"%s\"\n", ifname);
1143
1169
}
1144
1170
return false;
1145
1171
}
1146
1172
/* Accept point-to-point devices only if connect_to is specified */
1147
1173
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1148
1174
if(debug){
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Accepting point-to-point interface \"%s\"\n", ifname);
1151
1177
}
1152
1178
return true;
1153
1179
}
1154
1180
/* Otherwise, reject non-broadcast-capable devices */
1155
1181
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1156
1182
if(debug){
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1159
1185
}
1160
1186
return false;
1161
1187
}
1162
1188
/* Reject non-ARP interfaces (including dummy interfaces) */
1163
1189
if(ifr->ifr_flags & IFF_NOARP){
1164
1190
if(debug){
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Rejecting non-ARP interface \"%s\"\n", ifname);
1167
1193
}
1168
1194
return false;
1169
1195
}
1170
1196
1171
1197
/* Accept this device */
1172
1198
if(debug){
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1199
fprintf(stderr, "Mandos plugin mandos-client: "
1200
"Interface \"%s\" is good\n", ifname);
1174
1201
}
1175
1202
return true;
1176
1203
}
1188
1215
struct ifreq ifr;
1189
1216
if(not get_flags(if_entry->d_name, &ifr)){
1190
1217
if(debug){
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1218
fprintf(stderr, "Mandos plugin mandos-client: "
1219
"Failed to get flags for interface \"%s\"\n",
1220
if_entry->d_name);
1193
1221
}
1194
1222
return 0;
1195
1223
}
1213
1241
struct ifreq ifr;
1214
1242
if(not get_flags(if_entry->d_name, &ifr)){
1215
1243
if(debug){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1244
fprintf(stderr, "Mandos plugin mandos-client: "
1245
"Failed to get flags for interface \"%s\"\n",
1246
if_entry->d_name);
1218
1247
}
1219
1248
return 0;
1220
1249
}
1222
1251
/* Reject down interfaces */
1223
1252
if(not (ifr.ifr_flags & IFF_UP)){
1224
1253
if(debug){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1254
fprintf(stderr, "Mandos plugin mandos-client: "
1255
"Rejecting down interface \"%s\"\n",
1256
if_entry->d_name);
1227
1257
}
1228
1258
return 0;
1229
1259
}
1231
1261
/* Reject non-running interfaces */
1232
1262
if(not (ifr.ifr_flags & IFF_RUNNING)){
1233
1263
if(debug){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1264
fprintf(stderr, "Mandos plugin mandos-client: "
1265
"Rejecting non-running interface \"%s\"\n",
1266
if_entry->d_name);
1236
1267
}
1237
1268
return 0;
1238
1269
}
1272
1303
if((direntry->d_name)[sret] != '\0'){
1273
1304
/* Contains non-allowed characters */
1274
1305
if(debug){
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1276
direntry->d_name);
1306
fprintf(stderr, "Mandos plugin mandos-client: "
1307
"Ignoring hook \"%s\" with bad name\n",
1308
direntry->d_name);
1277
1309
}
1278
1310
return 0;
1279
1311
}
1295
1327
if(not (S_ISREG(st.st_mode))){
1296
1328
/* Not a regular file */
1297
1329
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1330
fprintf(stderr, "Mandos plugin mandos-client: "
1331
"Ignoring hook \"%s\" - not a file\n",
1332
direntry->d_name);
1300
1333
}
1301
1334
return 0;
1302
1335
}
1303
1336
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1304
1337
/* Not executable */
1305
1338
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1339
fprintf(stderr, "Mandos plugin mandos-client: "
1340
"Ignoring hook \"%s\" - not executable\n",
1341
direntry->d_name);
1308
1342
}
1309
1343
return 0;
1310
1344
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1315
1345
return 1;
1316
1346
}
1317
1347
1324
1354
while(true){
1325
1355
if(mc.current_server == NULL){
1326
1356
if (debug){
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1357
fprintf(stderr, "Mandos plugin mandos-client: "
1358
"Wait until first server is found. No timeout!\n");
1329
1359
}
1330
1360
ret = avahi_simple_poll_iterate(s, -1);
1331
1361
} else {
1332
1362
if (debug){
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1363
fprintf(stderr, "Mandos plugin mandos-client: "
1364
"Check current_server if we should run it,"
1365
" or wait\n");
1335
1366
}
1336
1367
/* the current time */
1337
1368
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1353
1384
- ((intmax_t)waited_time.tv_nsec / 1000000));
1354
1385
1355
1386
if (debug){
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1387
fprintf(stderr, "Mandos plugin mandos-client: "
1388
"Blocking for %" PRIdMAX " ms\n", block_time);
1358
1389
}
1359
1390
1360
1391
if(block_time <= 0){
1387
1418
}
1388
1419
}
1389
1420
1390
bool run_network_hooks(const char *mode, const char *interface,
1391
const float delay){
1392
struct dirent **direntries;
1393
struct dirent *direntry;
1394
int ret;
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1396
alphasort);
1397
if(numhooks == -1){
1398
perror_plus("scandir");
1399
} else {
1400
int devnull = open("/dev/null", O_RDONLY);
1401
for(int i = 0; i < numhooks; i++){
1402
direntry = direntries[i];
1403
char *fullname = NULL;
1404
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1405
if(ret < 0){
1406
perror_plus("asprintf");
1407
continue;
1408
}
1409
if(debug){
1410
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1411
direntry->d_name);
1412
}
1413
pid_t hook_pid = fork();
1414
if(hook_pid == 0){
1415
/* Child */
1416
/* Raise privileges */
1417
errno = 0;
1418
ret = seteuid(0);
1419
if(ret == -1){
1420
perror_plus("seteuid");
1421
}
1422
/* Raise privileges even more */
1423
errno = 0;
1424
ret = setuid(0);
1425
if(ret == -1){
1426
perror_plus("setuid");
1427
}
1428
/* Set group */
1429
errno = 0;
1430
ret = setgid(0);
1431
if(ret == -1){
1432
perror_plus("setgid");
1433
}
1434
/* Reset supplementary groups */
1435
errno = 0;
1436
ret = setgroups(0, NULL);
1437
if(ret == -1){
1438
perror_plus("setgroups");
1439
}
1440
dup2(devnull, STDIN_FILENO);
1441
close(devnull);
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1443
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
_exit(EX_OSERR);
1447
}
1448
ret = setenv("DEVICE", interface, 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
_exit(EX_OSERR);
1452
}
1453
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
_exit(EX_OSERR);
1457
}
1458
ret = setenv("MODE", mode, 1);
1459
if(ret == -1){
1460
perror_plus("setenv");
1461
_exit(EX_OSERR);
1462
}
1463
char *delaystring;
1464
ret = asprintf(&delaystring, "%f", delay);
1465
if(ret == -1){
1466
perror_plus("asprintf");
1467
_exit(EX_OSERR);
1468
}
1469
ret = setenv("DELAY", delaystring, 1);
1470
if(ret == -1){
1471
free(delaystring);
1472
perror_plus("setenv");
1473
_exit(EX_OSERR);
1474
}
1475
free(delaystring);
1476
if(connect_to != NULL){
1477
ret = setenv("CONNECT", connect_to, 1);
1478
if(ret == -1){
1479
perror_plus("setenv");
1480
_exit(EX_OSERR);
1481
}
1482
}
1483
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1484
perror_plus("execl");
1485
_exit(EXIT_FAILURE);
1486
}
1487
} else {
1488
int status;
1489
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1490
perror_plus("waitpid");
1491
free(fullname);
1492
continue;
1493
}
1494
if(WIFEXITED(status)){
1495
if(WEXITSTATUS(status) != 0){
1496
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1497
" with status %d\n", direntry->d_name,
1498
WEXITSTATUS(status));
1499
free(fullname);
1500
continue;
1501
}
1502
} else if(WIFSIGNALED(status)){
1503
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1504
" signal %d\n", direntry->d_name,
1505
WTERMSIG(status));
1506
free(fullname);
1507
continue;
1508
} else {
1509
fprintf_plus(stderr, "Warning: network hook \"%s\""
1510
" crashed\n", direntry->d_name);
1511
free(fullname);
1512
continue;
1513
}
1514
}
1515
free(fullname);
1516
if(debug){
1517
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1518
direntry->d_name);
1519
}
1520
}
1521
close(devnull);
1522
}
1523
return true;
1524
}
1525
1526
1421
int main(int argc, char *argv[]){
1527
1422
AvahiSServiceBrowser *sb = NULL;
1528
1423
int error;
1608
1503
.group = 2 },
1609
1504
{ .name = "retry", .key = 132,
1610
1505
.arg = "SECONDS",
1611
.doc = "Retry interval used when denied by the Mandos server",
1506
.doc = "Retry interval used when denied by the mandos server",
1612
1507
.group = 2 },
1613
1508
{ .name = "network-hook-dir", .key = 133,
1614
1509
.arg = "DIR",
1686
1581
argp_state_help(state, state->out_stream,
1687
1582
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1688
1583
case 'V': /* --version */
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1584
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1585
fprintf(state->out_stream, "%s\n", argp_program_version);
1690
1586
exit(argp_err_exit_status);
1691
1587
break;
1692
1588
default:
1719
1615
{
1720
1616
/* Work around Debian bug #633582:
1721
1617
<http://bugs.debian.org/633582> */
1618
struct stat st;
1722
1619
1723
1620
/* Re-raise priviliges */
1724
1621
errno = 0;
1725
1622
ret = seteuid(0);
1726
1623
if(ret == -1){
1727
1624
perror_plus("seteuid");
1625
}
1626
1627
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1628
int seckey_fd = open(seckey, O_RDONLY);
1629
if(seckey_fd == -1){
1630
perror_plus("open");
1631
} else {
1632
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1633
if(ret == -1){
1634
perror_plus("fstat");
1635
} else {
1636
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1637
ret = fchown(seckey_fd, uid, gid);
1638
if(ret == -1){
1639
perror_plus("fchown");
1640
}
1641
}
1642
}
1643
TEMP_FAILURE_RETRY(close(seckey_fd));
1644
}
1645
}
1646
1647
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1648
int pubkey_fd = open(pubkey, O_RDONLY);
1649
if(pubkey_fd == -1){
1650
perror_plus("open");
1651
} else {
1652
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1653
if(ret == -1){
1654
perror_plus("fstat");
1655
} else {
1656
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1657
ret = fchown(pubkey_fd, uid, gid);
1658
if(ret == -1){
1659
perror_plus("fchown");
1660
}
1661
}
1662
}
1663
TEMP_FAILURE_RETRY(close(pubkey_fd));
1664
}
1665
}
1666
1667
/* Lower privileges */
1668
errno = 0;
1669
ret = seteuid(uid);
1670
if(ret == -1){
1671
perror_plus("seteuid");
1672
}
1673
}
1674
1675
/* Find network hooks and run them */
1676
{
1677
struct dirent **direntries;
1678
struct dirent *direntry;
1679
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1680
alphasort);
1681
if(numhooks == -1){
1682
perror_plus("scandir");
1728
1683
} else {
1729
struct stat st;
1730
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1732
int seckey_fd = open(seckey, O_RDONLY);
1733
if(seckey_fd == -1){
1734
perror_plus("open");
1735
} else {
1736
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1737
if(ret == -1){
1738
perror_plus("fstat");
1739
} else {
1740
if(S_ISREG(st.st_mode)
1741
and st.st_uid == 0 and st.st_gid == 0){
1742
ret = fchown(seckey_fd, uid, gid);
1743
if(ret == -1){
1744
perror_plus("fchown");
1745
}
1746
}
1747
}
1748
TEMP_FAILURE_RETRY(close(seckey_fd));
1749
}
1750
}
1751
1752
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1753
int pubkey_fd = open(pubkey, O_RDONLY);
1754
if(pubkey_fd == -1){
1755
perror_plus("open");
1756
} else {
1757
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1758
if(ret == -1){
1759
perror_plus("fstat");
1760
} else {
1761
if(S_ISREG(st.st_mode)
1762
and st.st_uid == 0 and st.st_gid == 0){
1763
ret = fchown(pubkey_fd, uid, gid);
1764
if(ret == -1){
1765
perror_plus("fchown");
1766
}
1767
}
1768
}
1769
TEMP_FAILURE_RETRY(close(pubkey_fd));
1770
}
1771
}
1772
1773
/* Lower privileges */
1774
errno = 0;
1775
ret = seteuid(uid);
1776
if(ret == -1){
1777
perror_plus("seteuid");
1778
}
1684
int devnull = open("/dev/null", O_RDONLY);
1685
for(int i = 0; i < numhooks; i++){
1686
direntry = direntries[0];
1687
char *fullname = NULL;
1688
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1689
if(ret < 0){
1690
perror_plus("asprintf");
1691
continue;
1692
}
1693
pid_t hook_pid = fork();
1694
if(hook_pid == 0){
1695
/* Child */
1696
dup2(devnull, STDIN_FILENO);
1697
close(devnull);
1698
dup2(STDERR_FILENO, STDOUT_FILENO);
1699
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1700
if(ret == -1){
1701
perror_plus("setenv");
1702
exit(1);
1703
}
1704
ret = setenv("DEVICE", interface, 1);
1705
if(ret == -1){
1706
perror_plus("setenv");
1707
exit(1);
1708
}
1709
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1710
if(ret == -1){
1711
perror_plus("setenv");
1712
exit(1);
1713
}
1714
ret = setenv("MODE", "start", 1);
1715
if(ret == -1){
1716
perror_plus("setenv");
1717
exit(1);
1718
}
1719
char *delaystring;
1720
ret = asprintf(&delaystring, "%f", delay);
1721
if(ret == -1){
1722
perror_plus("asprintf");
1723
exit(1);
1724
}
1725
ret = setenv("DELAY", delaystring, 1);
1726
if(ret == -1){
1727
free(delaystring);
1728
perror_plus("setenv");
1729
exit(1);
1730
}
1731
free(delaystring);
1732
ret = execl(fullname, direntry->d_name, "start", NULL);
1733
perror_plus("execl");
1734
} else {
1735
int status;
1736
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1737
perror_plus("waitpid");
1738
free(fullname);
1739
continue;
1740
}
1741
if(WIFEXITED(status)){
1742
if(WEXITSTATUS(status) != 0){
1743
fprintf(stderr, "Mandos plugin mandos-client: "
1744
"Warning: network hook \"%s\" exited"
1745
" with status %d\n", direntry->d_name,
1746
WEXITSTATUS(status));
1747
free(fullname);
1748
continue;
1749
}
1750
} else if(WIFSIGNALED(status)){
1751
fprintf(stderr, "Mandos plugin mandos-client: "
1752
"Warning: network hook \"%s\" died by"
1753
" signal %d\n", direntry->d_name,
1754
WTERMSIG(status));
1755
free(fullname);
1756
continue;
1757
} else {
1758
fprintf(stderr, "Mandos plugin mandos-client: "
1759
"Warning: network hook \"%s\" crashed\n",
1760
direntry->d_name);
1761
free(fullname);
1762
continue;
1763
}
1764
}
1765
free(fullname);
1766
if(quit_now){
1767
goto end;
1768
}
1769
}
1770
close(devnull);
1779
1771
}
1780
1772
}
1781
1773
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1785
}
1786
1787
1774
if(not debug){
1788
1775
avahi_set_log_function(empty_log);
1789
1776
}
1803
1790
/* Pick the first interface returned */
1804
1791
interface = strdup(direntries[0]->d_name);
1805
1792
if(debug){
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1793
fprintf(stderr, "Mandos plugin mandos-client: "
1794
"Using interface \"%s\"\n", interface);
1807
1795
}
1808
1796
if(interface == NULL){
1809
1797
perror_plus("malloc");
1814
1802
free(direntries);
1815
1803
} else {
1816
1804
free(direntries);
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Could not find a network interface\n");
1818
1807
exitcode = EXIT_FAILURE;
1819
1808
goto end;
1820
1809
}
1826
1815
srand((unsigned int) time(NULL));
1827
1816
mc.simple_poll = avahi_simple_poll_new();
1828
1817
if(mc.simple_poll == NULL){
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Avahi: Failed to create simple poll object.\n");
1831
1820
exitcode = EX_UNAVAILABLE;
1832
1821
goto end;
1833
1822
}
1899
1888
if(strcmp(interface, "none") != 0){
1900
1889
if_index = (AvahiIfIndex) if_nametoindex(interface);
1901
1890
if(if_index == 0){
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1891
fprintf(stderr, "Mandos plugin mandos-client: "
1892
"No such interface: \"%s\"\n", interface);
1903
1893
exitcode = EX_UNAVAILABLE;
1904
1894
goto end;
1905
1895
}
2025
2015
#endif /* __linux__ */
2026
2016
/* Lower privileges */
2027
2017
errno = 0;
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
2018
if(take_down_interface){
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
2023
}
2024
} else {
2025
/* Lower privileges permanently */
2026
ret = setuid(uid);
2027
if(ret == -1){
2028
perror_plus("setuid");
2029
}
2032
2030
}
2033
2031
}
2034
2032
2038
2036
2039
2037
ret = init_gnutls_global(pubkey, seckey);
2040
2038
if(ret == -1){
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
2039
fprintf(stderr, "Mandos plugin mandos-client: "
2040
"init_gnutls_global failed\n");
2042
2041
exitcode = EX_UNAVAILABLE;
2043
2042
goto end;
2044
2043
} else {
2060
2059
}
2061
2060
2062
2061
if(not init_gpgme(pubkey, seckey, tempdir)){
2063
fprintf_plus(stderr, "init_gpgme failed\n");
2062
fprintf(stderr, "Mandos plugin mandos-client: "
2063
"init_gpgme failed\n");
2064
2064
exitcode = EX_UNAVAILABLE;
2065
2065
goto end;
2066
2066
} else {
2076
2076
/* (Mainly meant for debugging) */
2077
2077
char *address = strrchr(connect_to, ':');
2078
2078
if(address == NULL){
2079
fprintf_plus(stderr, "No colon in address\n");
2079
fprintf(stderr, "Mandos plugin mandos-client: "
2080
"No colon in address\n");
2080
2081
exitcode = EX_USAGE;
2081
2082
goto end;
2082
2083
}
2090
2091
tmpmax = strtoimax(address+1, &tmp, 10);
2091
2092
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2092
2093
or tmpmax != (uint16_t)tmpmax){
2093
fprintf_plus(stderr, "Bad port number\n");
2094
fprintf(stderr, "Mandos plugin mandos-client: "
2095
"Bad port number\n");
2094
2096
exitcode = EX_USAGE;
2095
2097
goto end;
2096
2098
}
2126
2128
break;
2127
2129
}
2128
2130
if(debug){
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2131
fprintf(stderr, "Mandos plugin mandos-client: "
2132
"Retrying in %d seconds\n", (int)retry_interval);
2131
2133
}
2132
2134
sleep((int)retry_interval);
2133
2135
}
2163
2165
2164
2166
/* Check if creating the Avahi server object succeeded */
2165
2167
if(mc.server == NULL){
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
2168
fprintf(stderr, "Mandos plugin mandos-client: "
2169
"Failed to create Avahi server: %s\n",
2170
avahi_strerror(error));
2168
2171
exitcode = EX_UNAVAILABLE;
2169
2172
goto end;
2170
2173
}
2178
2181
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2179
2182
NULL, 0, browse_callback, NULL);
2180
2183
if(sb == NULL){
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2182
avahi_strerror(avahi_server_errno(mc.server)));
2184
fprintf(stderr, "Mandos plugin mandos-client: "
2185
"Failed to create service browser: %s\n",
2186
avahi_strerror(avahi_server_errno(mc.server)));
2183
2187
exitcode = EX_UNAVAILABLE;
2184
2188
goto end;
2185
2189
}
2191
2195
/* Run the main loop */
2192
2196
2193
2197
if(debug){
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2198
fprintf(stderr, "Mandos plugin mandos-client: "
2199
"Starting Avahi loop search\n");
2195
2200
}
2196
2201
2197
2202
ret = avahi_loop_with_timeout(mc.simple_poll,
2198
2203
(int)(retry_interval * 1000));
2199
2204
if(debug){
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(ret == 0) ? "successfully" : "with error");
2205
fprintf(stderr, "Mandos plugin mandos-client: "
2206
"avahi_loop_with_timeout exited %s\n",
2207
(ret == 0) ? "successfully" : "with error");
2202
2208
}
2203
2209
2204
2210
end:
2205
2211
2206
2212
if(debug){
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2213
fprintf(stderr, "Mandos plugin mandos-client: "
2214
"%s exiting\n", argv[0]);
2208
2215
}
2209
2216
2210
2217
/* Cleanup things */
2226
2233
if(gpgme_initialized){
2227
2234
gpgme_release(mc.ctx);
2228
2235
}
2229
2236
2230
2237
/* Cleans up the circular linked list of Mandos servers the client
2231
2238
has seen */
2232
2239
if(mc.current_server != NULL){
2238
2245
}
2239
2246
}
2240
2247
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2248
/* XXX run network hooks "stop" here */
2243
2249
2244
/* Re-raise priviliges */
2245
{
2250
/* Take down the network interface */
2251
if(take_down_interface){
2252
/* Re-raise priviliges */
2246
2253
errno = 0;
2247
2254
ret = seteuid(0);
2248
2255
if(ret == -1){
2249
2256
perror_plus("seteuid");
2250
2257
}
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2258
if(geteuid() == 0){
2254
2259
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2255
2260
if(ret == -1){
2256
2261
perror_plus("ioctl SIOCGIFFLAGS");
2265
2270
if(ret == -1){
2266
2271
perror_plus("close");
2267
2272
}
2273
/* Lower privileges permanently */
2274
errno = 0;
2275
ret = setuid(uid);
2276
if(ret == -1){
2277
perror_plus("setuid");
2278
}
2268
2279
}
2269
2280
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2276
2281
2277
2282
/* Removes the GPGME temp directory and all files inside */
2278
2283
if(tempdir_created){
2292
2297
}
2293
2298
ret = remove(fullname);
2294
2299
if(ret == -1){
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
2300
fprintf(stderr, "Mandos plugin mandos-client: "
2301
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2297
2302
}
2298
2303
free(fullname);
2299
2304
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0