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- Committer: teddy at bsnet
- Date: 2011-11-13 13:55:45 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111113135545-hyb59g1q2icwdcte
* plugins.d/mandos-client.c: Some white space fixes.
(runnable_hook): Simplify name rule. More debug messages.
(runnable_hook): Simplify name rule. More debug messages.
- files removed:
- debian/mandos-client.examples
- 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 © 2008-2012 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
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_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(), _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
int fprintf_plus(FILE *stream, const char *format, ...){
182
va_list ap;
183
va_start (ap, format);
184
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
}
189
190
177
/*
191
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
192
179
* bytes. "buffer_capacity" is how much is currently allocated,
205
192
}
206
193
207
194
/* 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){
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
210
197
int ret;
211
198
server *new_server = malloc(sizeof(server));
212
199
if(new_server == NULL){
213
200
perror_plus("malloc");
214
return false;
201
return -1;
215
202
}
216
203
*new_server = (server){ .ip = strdup(ip),
217
204
.port = port,
219
206
.af = af };
220
207
if(new_server->ip == NULL){
221
208
perror_plus("strdup");
222
return false;
209
return -1;
223
210
}
224
211
/* Special case of first server */
225
212
if (mc.current_server == NULL){
236
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
237
224
if(ret == -1){
238
225
perror_plus("clock_gettime");
239
return false;
226
return -1;
240
227
}
241
return true;
228
return 0;
242
229
}
243
230
244
231
/*
266
253
267
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
255
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));
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
271
259
return false;
272
260
}
273
261
274
262
rc = gpgme_op_import(mc.ctx, pgp_data);
275
263
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
278
267
return false;
279
268
}
280
269
287
276
}
288
277
289
278
if(debug){
290
fprintf_plus(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
291
281
}
292
282
293
283
/* Init GPGME */
294
284
gpgme_check_version(NULL);
295
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
296
286
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));
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
299
290
return false;
300
291
}
301
292
302
293
/* Set GPGME home directory for the OpenPGP engine only */
303
294
rc = gpgme_get_engine_info(&engine_info);
304
295
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));
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
307
299
return false;
308
300
}
309
301
while(engine_info != NULL){
315
307
engine_info = engine_info->next;
316
308
}
317
309
if(engine_info == NULL){
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
320
312
return false;
321
313
}
322
314
323
315
/* Create new GPGME "context" */
324
316
rc = gpgme_new(&(mc.ctx));
325
317
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));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
329
321
return false;
330
322
}
331
323
350
342
ssize_t plaintext_length = 0;
351
343
352
344
if(debug){
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
354
347
}
355
348
356
349
/* Create new GPGME data buffer from memory cryptotext */
357
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
358
351
0);
359
352
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));
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
362
356
return -1;
363
357
}
364
358
365
359
/* Create new empty GPGME data buffer for the plaintext */
366
360
rc = gpgme_data_new(&dh_plain);
367
361
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));
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
371
365
gpgme_data_release(dh_crypto);
372
366
return -1;
373
367
}
376
370
data buffer */
377
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
378
372
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
381
376
plaintext_length = -1;
382
377
if(debug){
383
378
gpgme_decrypt_result_t result;
384
379
result = gpgme_op_decrypt_result(mc.ctx);
385
380
if(result == NULL){
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
387
383
} 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);
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
392
390
if(result->file_name != NULL){
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
394
393
}
395
394
gpgme_recipient_t recipient;
396
395
recipient = result->recipients;
397
396
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");
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
405
406
recipient = recipient->next;
406
407
}
407
408
}
410
411
}
411
412
412
413
if(debug){
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
414
416
}
415
417
416
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
447
449
}
448
450
449
451
if(debug){
450
fprintf_plus(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
451
454
for(ssize_t i = 0; i < plaintext_length; i++){
452
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
453
456
}
475
478
/* GnuTLS log function callback */
476
479
static void debuggnutls(__attribute__((unused)) int level,
477
480
const char* string){
478
fprintf_plus(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
479
482
}
480
483
481
484
static int init_gnutls_global(const char *pubkeyfilename,
483
486
int ret;
484
487
485
488
if(debug){
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
487
491
}
488
492
489
493
ret = gnutls_global_init();
490
494
if(ret != GNUTLS_E_SUCCESS){
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
493
497
return -1;
494
498
}
495
499
504
508
/* OpenPGP credentials */
505
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
506
510
if(ret != GNUTLS_E_SUCCESS){
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
509
513
gnutls_global_deinit();
510
514
return -1;
511
515
}
512
516
513
517
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);
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
518
522
}
519
523
520
524
ret = gnutls_certificate_set_openpgp_key_file
521
525
(mc.cred, pubkeyfilename, seckeyfilename,
522
526
GNUTLS_OPENPGP_FMT_BASE64);
523
527
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));
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
529
534
goto globalfail;
530
535
}
531
536
532
537
/* GnuTLS server initialization */
533
538
ret = gnutls_dh_params_init(&mc.dh_params);
534
539
if(ret != GNUTLS_E_SUCCESS){
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
538
543
goto globalfail;
539
544
}
540
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
541
546
if(ret != GNUTLS_E_SUCCESS){
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
544
550
goto globalfail;
545
551
}
546
552
566
572
}
567
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
568
574
if(ret != GNUTLS_E_SUCCESS){
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
572
578
}
573
579
574
580
{
581
587
}
582
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
583
589
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));
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
587
594
gnutls_deinit(*session);
588
595
return -1;
589
596
}
598
605
}
599
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
600
607
if(ret != GNUTLS_E_SUCCESS){
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
603
611
gnutls_deinit(*session);
604
612
return -1;
605
613
}
650
658
pf = PF_INET;
651
659
break;
652
660
default:
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
654
663
errno = EINVAL;
655
664
return -1;
656
665
}
661
670
}
662
671
663
672
if(debug){
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
666
676
}
667
677
668
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
694
704
}
695
705
if(ret == 0){
696
706
int e = errno;
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
698
709
errno = e;
699
710
goto mandos_end;
700
711
}
707
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
708
719
-Wunreachable-code*/
709
720
if(if_index == AVAHI_IF_UNSPEC){
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
712
724
errno = EINVAL;
713
725
goto mandos_end;
714
726
}
732
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
733
745
perror_plus("if_indextoname");
734
746
} else {
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
737
750
}
738
751
} else {
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
741
754
}
742
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
743
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
753
766
perror_plus("inet_ntop");
754
767
} else {
755
768
if(strcmp(addrstr, ip) != 0){
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
757
771
}
758
772
}
759
773
}
813
827
}
814
828
815
829
if(debug){
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
817
832
}
818
833
819
834
if(quit_now){
821
836
goto mandos_end;
822
837
}
823
838
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);
839
/* Spurious warning from -Wint-to-pointer-cast */
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
829
841
830
842
if(quit_now){
831
843
errno = EINTR;
842
854
843
855
if(ret != GNUTLS_E_SUCCESS){
844
856
if(debug){
845
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
846
859
gnutls_perror(ret);
847
860
}
848
861
errno = EPROTO;
852
865
/* Read OpenPGP packet that contains the wanted password */
853
866
854
867
if(debug){
855
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
856
" %s\n", ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
857
870
}
858
871
859
872
while(true){
897
910
}
898
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
899
912
if(ret < 0){
900
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
901
"***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
902
915
gnutls_perror(ret);
903
916
errno = EPROTO;
904
917
goto mandos_end;
905
918
}
906
919
break;
907
920
default:
908
fprintf_plus(stderr, "Unknown error while reading data from"
909
" encrypted session with Mandos server\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
910
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
911
925
errno = EIO;
912
926
goto mandos_end;
917
931
}
918
932
919
933
if(debug){
920
fprintf_plus(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
921
936
}
922
937
923
938
if(quit_now){
952
967
if(ret == 0 and ferror(stdout)){
953
968
int e = errno;
954
969
if(debug){
955
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
956
strerror(errno));
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
972
strerror(errno));
957
973
}
958
974
errno = e;
959
975
goto mandos_end;
1016
1032
switch(event){
1017
1033
default:
1018
1034
case AVAHI_RESOLVER_FAILURE:
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)));
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
avahi_strerror(avahi_server_errno(mc.server)));
1023
1039
break;
1024
1040
1025
1041
case AVAHI_RESOLVER_FOUND:
1027
1043
char ip[AVAHI_ADDRESS_STR_MAX];
1028
1044
avahi_address_snprint(ip, sizeof(ip), address);
1029
1045
if(debug){
1030
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1031
PRIdMAX ") on port %" PRIu16 "\n", name,
1032
host_name, ip, (intmax_t)interface, port);
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
ip, (intmax_t)interface, port);
1033
1050
}
1034
1051
int ret = start_mandos_communication(ip, port, interface,
1035
1052
avahi_proto_to_af(proto));
1036
1053
if(ret == 0){
1037
1054
avahi_simple_poll_quit(mc.simple_poll);
1038
1055
} else {
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
}
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
1044
1058
}
1045
1059
}
1046
1060
}
1070
1084
default:
1071
1085
case AVAHI_BROWSER_FAILURE:
1072
1086
1073
fprintf_plus(stderr, "(Avahi browser) %s\n",
1074
avahi_strerror(avahi_server_errno(mc.server)));
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1089
avahi_strerror(avahi_server_errno(mc.server)));
1075
1090
avahi_simple_poll_quit(mc.simple_poll);
1076
1091
return;
1077
1092
1084
1099
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1085
1100
name, type, domain, protocol, 0,
1086
1101
resolve_callback, NULL) == NULL)
1087
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1088
" %s\n", name,
1089
avahi_strerror(avahi_server_errno(mc.server)));
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
1090
1105
break;
1091
1106
1092
1107
case AVAHI_BROWSER_REMOVE:
1095
1110
case AVAHI_BROWSER_ALL_FOR_NOW:
1096
1111
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1097
1112
if(debug){
1098
fprintf_plus(stderr, "No Mandos server found, still"
1099
" searching...\n");
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1100
1115
}
1101
1116
break;
1102
1117
}
1141
1156
/* Reject the loopback device */
1142
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1143
1158
if(debug){
1144
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1145
ifname);
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1146
1161
}
1147
1162
return false;
1148
1163
}
1149
1164
/* Accept point-to-point devices only if connect_to is specified */
1150
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1151
1166
if(debug){
1152
fprintf_plus(stderr, "Accepting point-to-point interface"
1153
" \"%s\"\n", ifname);
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1154
1169
}
1155
1170
return true;
1156
1171
}
1157
1172
/* Otherwise, reject non-broadcast-capable devices */
1158
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1159
1174
if(debug){
1160
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1161
" \"%s\"\n", ifname);
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1162
1177
}
1163
1178
return false;
1164
1179
}
1165
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1166
1181
if(ifr->ifr_flags & IFF_NOARP){
1167
1182
if(debug){
1168
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1169
ifname);
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1170
1185
}
1171
1186
return false;
1172
1187
}
1173
1188
1174
1189
/* Accept this device */
1175
1190
if(debug){
1176
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1177
1193
}
1178
1194
return true;
1179
1195
}
1191
1207
struct ifreq ifr;
1192
1208
if(not get_flags(if_entry->d_name, &ifr)){
1193
1209
if(debug){
1194
fprintf_plus(stderr, "Failed to get flags for interface "
1195
"\"%s\"\n", if_entry->d_name);
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1196
1213
}
1197
1214
return 0;
1198
1215
}
1216
1233
struct ifreq ifr;
1217
1234
if(not get_flags(if_entry->d_name, &ifr)){
1218
1235
if(debug){
1219
fprintf_plus(stderr, "Failed to get flags for interface "
1220
"\"%s\"\n", if_entry->d_name);
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1221
1239
}
1222
1240
return 0;
1223
1241
}
1225
1243
/* Reject down interfaces */
1226
1244
if(not (ifr.ifr_flags & IFF_UP)){
1227
1245
if(debug){
1228
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1229
if_entry->d_name);
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1230
1249
}
1231
1250
return 0;
1232
1251
}
1234
1253
/* Reject non-running interfaces */
1235
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1236
1255
if(debug){
1237
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1238
if_entry->d_name);
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1239
1259
}
1240
1260
return 0;
1241
1261
}
1275
1295
if((direntry->d_name)[sret] != '\0'){
1276
1296
/* Contains non-allowed characters */
1277
1297
if(debug){
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1279
direntry->d_name);
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1280
1301
}
1281
1302
return 0;
1282
1303
}
1298
1319
if(not (S_ISREG(st.st_mode))){
1299
1320
/* Not a regular file */
1300
1321
if(debug){
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1302
direntry->d_name);
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1303
1325
}
1304
1326
return 0;
1305
1327
}
1306
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
1329
/* Not executable */
1308
1330
if(debug){
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1310
direntry->d_name);
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1311
1334
}
1312
1335
return 0;
1313
1336
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1318
1337
return 1;
1319
1338
}
1320
1339
1327
1346
while(true){
1328
1347
if(mc.current_server == NULL){
1329
1348
if (debug){
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1332
1351
}
1333
1352
ret = avahi_simple_poll_iterate(s, -1);
1334
1353
} else {
1335
1354
if (debug){
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1338
1358
}
1339
1359
/* the current time */
1340
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1356
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1377
1358
1378
if (debug){
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1361
1381
}
1362
1382
1363
1383
if(block_time <= 0){
1390
1410
}
1391
1411
}
1392
1412
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
1529
1413
int main(int argc, char *argv[]){
1530
1414
AvahiSServiceBrowser *sb = NULL;
1531
1415
int error;
1611
1495
.group = 2 },
1612
1496
{ .name = "retry", .key = 132,
1613
1497
.arg = "SECONDS",
1614
.doc = "Retry interval used when denied by the Mandos server",
1498
.doc = "Retry interval used when denied by the mandos server",
1615
1499
.group = 2 },
1616
1500
{ .name = "network-hook-dir", .key = 133,
1617
1501
.arg = "DIR",
1689
1573
argp_state_help(state, state->out_stream,
1690
1574
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1691
1575
case 'V': /* --version */
1692
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1576
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1577
fprintf(state->out_stream, "%s\n", argp_program_version);
1693
1578
exit(argp_err_exit_status);
1694
1579
break;
1695
1580
default:
1722
1607
{
1723
1608
/* Work around Debian bug #633582:
1724
1609
<http://bugs.debian.org/633582> */
1610
struct stat st;
1725
1611
1726
1612
/* Re-raise priviliges */
1727
1613
errno = 0;
1728
1614
ret = seteuid(0);
1729
1615
if(ret == -1){
1730
1616
perror_plus("seteuid");
1617
}
1618
1619
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1620
int seckey_fd = open(seckey, O_RDONLY);
1621
if(seckey_fd == -1){
1622
perror_plus("open");
1623
} else {
1624
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1625
if(ret == -1){
1626
perror_plus("fstat");
1627
} else {
1628
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1629
ret = fchown(seckey_fd, uid, gid);
1630
if(ret == -1){
1631
perror_plus("fchown");
1632
}
1633
}
1634
}
1635
TEMP_FAILURE_RETRY(close(seckey_fd));
1636
}
1637
}
1638
1639
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1640
int pubkey_fd = open(pubkey, O_RDONLY);
1641
if(pubkey_fd == -1){
1642
perror_plus("open");
1643
} else {
1644
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1645
if(ret == -1){
1646
perror_plus("fstat");
1647
} else {
1648
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1649
ret = fchown(pubkey_fd, uid, gid);
1650
if(ret == -1){
1651
perror_plus("fchown");
1652
}
1653
}
1654
}
1655
TEMP_FAILURE_RETRY(close(pubkey_fd));
1656
}
1657
}
1658
1659
/* Lower privileges */
1660
errno = 0;
1661
ret = seteuid(uid);
1662
if(ret == -1){
1663
perror_plus("seteuid");
1664
}
1665
}
1666
1667
/* Find network hooks and run them */
1668
{
1669
struct dirent **direntries;
1670
struct dirent *direntry;
1671
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1672
alphasort);
1673
if(numhooks == -1){
1674
perror_plus("scandir");
1731
1675
} else {
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
}
1676
int devnull = open("/dev/null", O_RDONLY);
1677
for(int i = 0; i < numhooks; i++){
1678
direntry = direntries[0];
1679
char *fullname = NULL;
1680
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1681
if(ret < 0){
1682
perror_plus("asprintf");
1683
continue;
1684
}
1685
pid_t hook_pid = fork();
1686
if(hook_pid == 0){
1687
/* Child */
1688
dup2(devnull, STDIN_FILENO);
1689
close(devnull);
1690
dup2(STDERR_FILENO, STDOUT_FILENO);
1691
ret = setenv("DEVICE", interface, 1);
1692
if(ret == -1){
1693
perror_plus("setenv");
1694
exit(1);
1695
}
1696
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1697
if(ret == -1){
1698
perror_plus("setenv");
1699
exit(1);
1700
}
1701
ret = setenv("MODE", "start", 1);
1702
if(ret == -1){
1703
perror_plus("setenv");
1704
exit(1);
1705
}
1706
char *delaystring;
1707
ret = asprintf(&delaystring, "%f", delay);
1708
if(ret == -1){
1709
perror_plus("asprintf");
1710
exit(1);
1711
}
1712
ret = setenv("DELAY", delaystring, 1);
1713
if(ret == -1){
1714
free(delaystring);
1715
perror_plus("setenv");
1716
exit(1);
1717
}
1718
free(delaystring);
1719
ret = execl(fullname, direntry->d_name, "start", NULL);
1720
perror_plus("execl");
1721
} else {
1722
int status;
1723
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1724
perror_plus("waitpid");
1725
free(fullname);
1726
continue;
1727
}
1728
if(WIFEXITED(status)){
1729
if(WEXITSTATUS(status) != 0){
1730
fprintf(stderr, "Mandos plugin mandos-client: "
1731
"Warning: network hook \"%s\" exited"
1732
" with status %d\n", direntry->d_name,
1733
WEXITSTATUS(status));
1734
free(fullname);
1735
continue;
1736
}
1737
} else if(WIFSIGNALED(status)){
1738
fprintf(stderr, "Mandos plugin mandos-client: "
1739
"Warning: network hook \"%s\" died by"
1740
" signal %d\n", direntry->d_name,
1741
WTERMSIG(status));
1742
free(fullname);
1743
continue;
1744
} else {
1745
fprintf(stderr, "Mandos plugin mandos-client: "
1746
"Warning: network hook \"%s\" crashed\n",
1747
direntry->d_name);
1748
free(fullname);
1749
continue;
1750
}
1751
}
1752
free(fullname);
1753
if(quit_now){
1754
goto end;
1755
}
1756
}
1757
close(devnull);
1782
1758
}
1783
1759
}
1784
1760
1785
/* Run network hooks */
1786
if(not run_network_hooks("start", interface, delay)){
1787
goto end;
1788
}
1789
1790
1761
if(not debug){
1791
1762
avahi_set_log_function(empty_log);
1792
1763
}
1806
1777
/* Pick the first interface returned */
1807
1778
interface = strdup(direntries[0]->d_name);
1808
1779
if(debug){
1809
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1780
fprintf(stderr, "Mandos plugin mandos-client: "
1781
"Using interface \"%s\"\n", interface);
1810
1782
}
1811
1783
if(interface == NULL){
1812
1784
perror_plus("malloc");
1817
1789
free(direntries);
1818
1790
} else {
1819
1791
free(direntries);
1820
fprintf_plus(stderr, "Could not find a network interface\n");
1792
fprintf(stderr, "Mandos plugin mandos-client: "
1793
"Could not find a network interface\n");
1821
1794
exitcode = EXIT_FAILURE;
1822
1795
goto end;
1823
1796
}
1829
1802
srand((unsigned int) time(NULL));
1830
1803
mc.simple_poll = avahi_simple_poll_new();
1831
1804
if(mc.simple_poll == NULL){
1832
fprintf_plus(stderr,
1833
"Avahi: Failed to create simple poll object.\n");
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Avahi: Failed to create simple poll object.\n");
1834
1807
exitcode = EX_UNAVAILABLE;
1835
1808
goto end;
1836
1809
}
1902
1875
if(strcmp(interface, "none") != 0){
1903
1876
if_index = (AvahiIfIndex) if_nametoindex(interface);
1904
1877
if(if_index == 0){
1905
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1878
fprintf(stderr, "Mandos plugin mandos-client: "
1879
"No such interface: \"%s\"\n", interface);
1906
1880
exitcode = EX_UNAVAILABLE;
1907
1881
goto end;
1908
1882
}
2028
2002
#endif /* __linux__ */
2029
2003
/* Lower privileges */
2030
2004
errno = 0;
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
2005
if(take_down_interface){
2006
/* Lower privileges */
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2010
}
2011
} else {
2012
/* Lower privileges permanently */
2013
ret = setuid(uid);
2014
if(ret == -1){
2015
perror_plus("setuid");
2016
}
2035
2017
}
2036
2018
}
2037
2019
2041
2023
2042
2024
ret = init_gnutls_global(pubkey, seckey);
2043
2025
if(ret == -1){
2044
fprintf_plus(stderr, "init_gnutls_global failed\n");
2026
fprintf(stderr, "Mandos plugin mandos-client: "
2027
"init_gnutls_global failed\n");
2045
2028
exitcode = EX_UNAVAILABLE;
2046
2029
goto end;
2047
2030
} else {
2063
2046
}
2064
2047
2065
2048
if(not init_gpgme(pubkey, seckey, tempdir)){
2066
fprintf_plus(stderr, "init_gpgme failed\n");
2049
fprintf(stderr, "Mandos plugin mandos-client: "
2050
"init_gpgme failed\n");
2067
2051
exitcode = EX_UNAVAILABLE;
2068
2052
goto end;
2069
2053
} else {
2079
2063
/* (Mainly meant for debugging) */
2080
2064
char *address = strrchr(connect_to, ':');
2081
2065
if(address == NULL){
2082
fprintf_plus(stderr, "No colon in address\n");
2066
fprintf(stderr, "Mandos plugin mandos-client: "
2067
"No colon in address\n");
2083
2068
exitcode = EX_USAGE;
2084
2069
goto end;
2085
2070
}
2093
2078
tmpmax = strtoimax(address+1, &tmp, 10);
2094
2079
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2095
2080
or tmpmax != (uint16_t)tmpmax){
2096
fprintf_plus(stderr, "Bad port number\n");
2081
fprintf(stderr, "Mandos plugin mandos-client: "
2082
"Bad port number\n");
2097
2083
exitcode = EX_USAGE;
2098
2084
goto end;
2099
2085
}
2129
2115
break;
2130
2116
}
2131
2117
if(debug){
2132
fprintf_plus(stderr, "Retrying in %d seconds\n",
2133
(int)retry_interval);
2118
fprintf(stderr, "Mandos plugin mandos-client: "
2119
"Retrying in %d seconds\n", (int)retry_interval);
2134
2120
}
2135
2121
sleep((int)retry_interval);
2136
2122
}
2166
2152
2167
2153
/* Check if creating the Avahi server object succeeded */
2168
2154
if(mc.server == NULL){
2169
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2170
avahi_strerror(error));
2155
fprintf(stderr, "Mandos plugin mandos-client: "
2156
"Failed to create Avahi server: %s\n",
2157
avahi_strerror(error));
2171
2158
exitcode = EX_UNAVAILABLE;
2172
2159
goto end;
2173
2160
}
2181
2168
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2182
2169
NULL, 0, browse_callback, NULL);
2183
2170
if(sb == NULL){
2184
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2185
avahi_strerror(avahi_server_errno(mc.server)));
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2186
2174
exitcode = EX_UNAVAILABLE;
2187
2175
goto end;
2188
2176
}
2194
2182
/* Run the main loop */
2195
2183
2196
2184
if(debug){
2197
fprintf_plus(stderr, "Starting Avahi loop search\n");
2185
fprintf(stderr, "Mandos plugin mandos-client: "
2186
"Starting Avahi loop search\n");
2198
2187
}
2199
2188
2200
2189
ret = avahi_loop_with_timeout(mc.simple_poll,
2201
2190
(int)(retry_interval * 1000));
2202
2191
if(debug){
2203
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2204
(ret == 0) ? "successfully" : "with error");
2192
fprintf(stderr, "Mandos plugin mandos-client: "
2193
"avahi_loop_with_timeout exited %s\n",
2194
(ret == 0) ? "successfully" : "with error");
2205
2195
}
2206
2196
2207
2197
end:
2208
2198
2209
2199
if(debug){
2210
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2200
fprintf(stderr, "Mandos plugin mandos-client: "
2201
"%s exiting\n", argv[0]);
2211
2202
}
2212
2203
2213
2204
/* Cleanup things */
2229
2220
if(gpgme_initialized){
2230
2221
gpgme_release(mc.ctx);
2231
2222
}
2232
2223
2233
2224
/* Cleans up the circular linked list of Mandos servers the client
2234
2225
has seen */
2235
2226
if(mc.current_server != NULL){
2241
2232
}
2242
2233
}
2243
2234
2244
/* Run network hooks */
2245
run_network_hooks("stop", interface, delay);
2235
/* XXX run network hooks "stop" here */
2246
2236
2247
/* Re-raise priviliges */
2248
{
2237
/* Take down the network interface */
2238
if(take_down_interface){
2239
/* Re-raise priviliges */
2249
2240
errno = 0;
2250
2241
ret = seteuid(0);
2251
2242
if(ret == -1){
2252
2243
perror_plus("seteuid");
2253
2244
}
2254
2255
/* Take down the network interface */
2256
if(take_down_interface and geteuid() == 0){
2245
if(geteuid() == 0){
2257
2246
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2258
2247
if(ret == -1){
2259
2248
perror_plus("ioctl SIOCGIFFLAGS");
2268
2257
if(ret == -1){
2269
2258
perror_plus("close");
2270
2259
}
2260
/* Lower privileges permanently */
2261
errno = 0;
2262
ret = setuid(uid);
2263
if(ret == -1){
2264
perror_plus("setuid");
2265
}
2271
2266
}
2272
2267
}
2273
/* Lower privileges permanently */
2274
errno = 0;
2275
ret = setuid(uid);
2276
if(ret == -1){
2277
perror_plus("setuid");
2278
}
2279
2268
2280
2269
/* Removes the GPGME temp directory and all files inside */
2281
2270
if(tempdir_created){
2295
2284
}
2296
2285
ret = remove(fullname);
2297
2286
if(ret == -1){
2298
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2299
strerror(errno));
2287
fprintf(stderr, "Mandos plugin mandos-client: "
2288
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2300
2289
}
2301
2290
free(fullname);
2302
2291
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0