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- Committer: teddy at bsnet
- Date: 2011-11-12 17:43:12 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-20111112174312-a227djujmo3oxw9m
* plugins.d/mandos-client.c (runnable_hook): Bug fix: stat using the
full path.
(mail): Take new "--network-hook-dir" option.
full path.
(mail): Take new "--network-hook-dir" option.
- files removed:
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
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() */
111
110
init_gnutls_session(),
112
111
GNUTLS_* */
113
112
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
116
115
117
116
/* GPGME */
118
117
#include <gpgme.h> /* All GPGME types, constants and
175
174
perror(print_text);
176
175
}
177
176
178
__attribute__((format (gnu_printf, 2, 3)))
179
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_list ap;
181
va_start (ap, format);
182
183
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
184
program_invocation_short_name));
185
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
186
}
187
188
177
/*
189
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
190
179
* bytes. "buffer_capacity" is how much is currently allocated,
191
180
* "buffer_length" is how much is already used.
192
181
*/
193
182
size_t incbuffer(char **buffer, size_t buffer_length,
194
size_t buffer_capacity){
183
size_t buffer_capacity){
195
184
if(buffer_length + BUFFER_SIZE > buffer_capacity){
196
185
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
197
186
if(buffer == NULL){
203
192
}
204
193
205
194
/* Add server to set of servers to retry periodically */
206
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
int af){
195
int add_server(const char *ip, uint16_t port,
196
AvahiIfIndex if_index,
197
int af){
208
198
int ret;
209
199
server *new_server = malloc(sizeof(server));
210
200
if(new_server == NULL){
211
201
perror_plus("malloc");
212
return false;
202
return -1;
213
203
}
214
204
*new_server = (server){ .ip = strdup(ip),
215
.port = port,
216
.if_index = if_index,
217
.af = af };
205
.port = port,
206
.if_index = if_index,
207
.af = af };
218
208
if(new_server->ip == NULL){
219
209
perror_plus("strdup");
220
return false;
210
return -1;
221
211
}
222
212
/* Special case of first server */
223
213
if (mc.current_server == NULL){
234
224
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
235
225
if(ret == -1){
236
226
perror_plus("clock_gettime");
237
return false;
227
return -1;
238
228
}
239
return true;
229
return 0;
240
230
}
241
231
242
232
/*
243
233
* Initialize GPGME.
244
234
*/
245
static bool init_gpgme(const char *seckey, const char *pubkey,
246
const char *tempdir){
235
static bool init_gpgme(const char *seckey,
236
const char *pubkey, const char *tempdir){
247
237
gpgme_error_t rc;
248
238
gpgme_engine_info_t engine_info;
249
239
264
254
265
255
rc = gpgme_data_new_from_fd(&pgp_data, fd);
266
256
if(rc != GPG_ERR_NO_ERROR){
267
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
268
gpgme_strsource(rc), gpgme_strerror(rc));
257
fprintf(stderr, "Mandos plugin mandos-client: "
258
"bad gpgme_data_new_from_fd: %s: %s\n",
259
gpgme_strsource(rc), gpgme_strerror(rc));
269
260
return false;
270
261
}
271
262
272
263
rc = gpgme_op_import(mc.ctx, pgp_data);
273
264
if(rc != GPG_ERR_NO_ERROR){
274
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf(stderr, "Mandos plugin mandos-client: "
266
"bad gpgme_op_import: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
276
268
return false;
277
269
}
278
270
285
277
}
286
278
287
279
if(debug){
288
fprintf_plus(stderr, "Initializing GPGME\n");
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
289
282
}
290
283
291
284
/* Init GPGME */
292
285
gpgme_check_version(NULL);
293
286
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
294
287
if(rc != GPG_ERR_NO_ERROR){
295
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
296
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
297
291
return false;
298
292
}
299
293
300
294
/* Set GPGME home directory for the OpenPGP engine only */
301
295
rc = gpgme_get_engine_info(&engine_info);
302
296
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
305
300
return false;
306
301
}
307
302
while(engine_info != NULL){
313
308
engine_info = engine_info->next;
314
309
}
315
310
if(engine_info == NULL){
316
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
317
tempdir);
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
318
313
return false;
319
314
}
320
315
321
316
/* Create new GPGME "context" */
322
317
rc = gpgme_new(&(mc.ctx));
323
318
if(rc != GPG_ERR_NO_ERROR){
324
fprintf_plus(stderr, "Mandos plugin mandos-client: "
325
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
326
gpgme_strerror(rc));
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
327
322
return false;
328
323
}
329
324
348
343
ssize_t plaintext_length = 0;
349
344
350
345
if(debug){
351
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
352
348
}
353
349
354
350
/* Create new GPGME data buffer from memory cryptotext */
355
351
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
356
352
0);
357
353
if(rc != GPG_ERR_NO_ERROR){
358
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
359
gpgme_strsource(rc), gpgme_strerror(rc));
354
fprintf(stderr, "Mandos plugin mandos-client: "
355
"bad gpgme_data_new_from_mem: %s: %s\n",
356
gpgme_strsource(rc), gpgme_strerror(rc));
360
357
return -1;
361
358
}
362
359
363
360
/* Create new empty GPGME data buffer for the plaintext */
364
361
rc = gpgme_data_new(&dh_plain);
365
362
if(rc != GPG_ERR_NO_ERROR){
366
fprintf_plus(stderr, "Mandos plugin mandos-client: "
367
"bad gpgme_data_new: %s: %s\n",
368
gpgme_strsource(rc), gpgme_strerror(rc));
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
365
gpgme_strsource(rc), gpgme_strerror(rc));
369
366
gpgme_data_release(dh_crypto);
370
367
return -1;
371
368
}
374
371
data buffer */
375
372
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
376
373
if(rc != GPG_ERR_NO_ERROR){
377
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
374
fprintf(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
379
377
plaintext_length = -1;
380
378
if(debug){
381
379
gpgme_decrypt_result_t result;
382
380
result = gpgme_op_decrypt_result(mc.ctx);
383
381
if(result == NULL){
384
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
385
384
} else {
386
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf_plus(stderr, "Wrong key usage: %u\n",
389
result->wrong_key_usage);
385
fprintf(stderr, "Mandos plugin mandos-client: "
386
"Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf(stderr, "Mandos plugin mandos-client: "
389
"Wrong key usage: %u\n",
390
result->wrong_key_usage);
390
391
if(result->file_name != NULL){
391
fprintf_plus(stderr, "File name: %s\n", result->file_name);
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"File name: %s\n", result->file_name);
392
394
}
393
395
gpgme_recipient_t recipient;
394
396
recipient = result->recipients;
395
397
while(recipient != NULL){
396
fprintf_plus(stderr, "Public key algorithm: %s\n",
397
gpgme_pubkey_algo_name
398
(recipient->pubkey_algo));
399
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
400
fprintf_plus(stderr, "Secret key available: %s\n",
401
recipient->status == GPG_ERR_NO_SECKEY
402
? "No" : "Yes");
398
fprintf(stderr, "Mandos plugin mandos-client: "
399
"Public key algorithm: %s\n",
400
gpgme_pubkey_algo_name(recipient->pubkey_algo));
401
fprintf(stderr, "Mandos plugin mandos-client: "
402
"Key ID: %s\n", recipient->keyid);
403
fprintf(stderr, "Mandos plugin mandos-client: "
404
"Secret key available: %s\n",
405
recipient->status == GPG_ERR_NO_SECKEY
406
? "No" : "Yes");
403
407
recipient = recipient->next;
404
408
}
405
409
}
408
412
}
409
413
410
414
if(debug){
411
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
412
417
}
413
418
414
419
/* Seek back to the beginning of the GPGME plaintext data buffer */
421
426
*plaintext = NULL;
422
427
while(true){
423
428
plaintext_capacity = incbuffer(plaintext,
424
(size_t)plaintext_length,
425
plaintext_capacity);
429
(size_t)plaintext_length,
430
plaintext_capacity);
426
431
if(plaintext_capacity == 0){
427
perror_plus("incbuffer");
428
plaintext_length = -1;
429
goto decrypt_end;
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
430
435
}
431
436
432
437
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
445
450
}
446
451
447
452
if(debug){
448
fprintf_plus(stderr, "Decrypted password is: ");
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
449
455
for(ssize_t i = 0; i < plaintext_length; i++){
450
456
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
451
457
}
473
479
/* GnuTLS log function callback */
474
480
static void debuggnutls(__attribute__((unused)) int level,
475
481
const char* string){
476
fprintf_plus(stderr, "GnuTLS: %s", string);
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
477
483
}
478
484
479
485
static int init_gnutls_global(const char *pubkeyfilename,
481
487
int ret;
482
488
483
489
if(debug){
484
fprintf_plus(stderr, "Initializing GnuTLS\n");
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
485
492
}
486
493
487
494
ret = gnutls_global_init();
488
495
if(ret != GNUTLS_E_SUCCESS){
489
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
490
safer_gnutls_strerror(ret));
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
491
498
return -1;
492
499
}
493
500
502
509
/* OpenPGP credentials */
503
510
ret = gnutls_certificate_allocate_credentials(&mc.cred);
504
511
if(ret != GNUTLS_E_SUCCESS){
505
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
506
safer_gnutls_strerror(ret));
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
507
514
gnutls_global_deinit();
508
515
return -1;
509
516
}
510
517
511
518
if(debug){
512
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
513
" secret key %s as GnuTLS credentials\n",
514
pubkeyfilename,
515
seckeyfilename);
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"Attempting to use OpenPGP public key %s and"
521
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
522
seckeyfilename);
516
523
}
517
524
518
525
ret = gnutls_certificate_set_openpgp_key_file
519
526
(mc.cred, pubkeyfilename, seckeyfilename,
520
527
GNUTLS_OPENPGP_FMT_BASE64);
521
528
if(ret != GNUTLS_E_SUCCESS){
522
fprintf_plus(stderr,
523
"Error[%d] while reading the OpenPGP key pair ('%s',"
524
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
525
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
526
safer_gnutls_strerror(ret));
529
fprintf(stderr,
530
"Mandos plugin mandos-client: "
531
"Error[%d] while reading the OpenPGP key pair ('%s',"
532
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
533
fprintf(stderr, "Mandos plugin mandos-client: "
534
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
527
535
goto globalfail;
528
536
}
529
537
530
538
/* GnuTLS server initialization */
531
539
ret = gnutls_dh_params_init(&mc.dh_params);
532
540
if(ret != GNUTLS_E_SUCCESS){
533
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
534
" initialization: %s\n",
535
safer_gnutls_strerror(ret));
541
fprintf(stderr, "Mandos plugin mandos-client: "
542
"Error in GnuTLS DH parameter initialization:"
543
" %s\n", safer_gnutls_strerror(ret));
536
544
goto globalfail;
537
545
}
538
546
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
539
547
if(ret != GNUTLS_E_SUCCESS){
540
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
541
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
550
safer_gnutls_strerror(ret));
542
551
goto globalfail;
543
552
}
544
553
564
573
}
565
574
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
566
575
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr,
568
"Error in GnuTLS session initialization: %s\n",
569
safer_gnutls_strerror(ret));
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
578
safer_gnutls_strerror(ret));
570
579
}
571
580
572
581
{
579
588
}
580
589
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
581
590
if(ret != GNUTLS_E_SUCCESS){
582
fprintf_plus(stderr, "Syntax error at: %s\n", err);
583
fprintf_plus(stderr, "GnuTLS error: %s\n",
584
safer_gnutls_strerror(ret));
591
fprintf(stderr, "Mandos plugin mandos-client: "
592
"Syntax error at: %s\n", err);
593
fprintf(stderr, "Mandos plugin mandos-client: "
594
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
585
595
gnutls_deinit(*session);
586
596
return -1;
587
597
}
596
606
}
597
607
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
598
608
if(ret != GNUTLS_E_SUCCESS){
599
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
600
safer_gnutls_strerror(ret));
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
611
safer_gnutls_strerror(ret));
601
612
gnutls_deinit(*session);
602
613
return -1;
603
614
}
648
659
pf = PF_INET;
649
660
break;
650
661
default:
651
fprintf_plus(stderr, "Bad address family: %d\n", af);
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
652
664
errno = EINVAL;
653
665
return -1;
654
666
}
659
671
}
660
672
661
673
if(debug){
662
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
663
PRIu16 "\n", ip, port);
674
fprintf(stderr, "Mandos plugin mandos-client: "
675
"Setting up a TCP connection to %s, port %" PRIu16
676
"\n", ip, port);
664
677
}
665
678
666
679
tcp_sd = socket(pf, SOCK_STREAM, 0);
692
705
}
693
706
if(ret == 0){
694
707
int e = errno;
695
fprintf_plus(stderr, "Bad address: %s\n", ip);
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
696
710
errno = e;
697
711
goto mandos_end;
698
712
}
703
717
704
718
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
705
719
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
706
-Wunreachable-code*/
720
-Wunreachable-code*/
707
721
if(if_index == AVAHI_IF_UNSPEC){
708
fprintf_plus(stderr, "An IPv6 link-local address is"
709
" incomplete without a network interface\n");
722
fprintf(stderr, "Mandos plugin mandos-client: "
723
"An IPv6 link-local address is incomplete"
724
" without a network interface\n");
710
725
errno = EINVAL;
711
726
goto mandos_end;
712
727
}
730
745
if(if_indextoname((unsigned int)if_index, interface) == NULL){
731
746
perror_plus("if_indextoname");
732
747
} else {
733
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
734
"\n", ip, interface, port);
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
750
ip, interface, port);
735
751
}
736
752
} else {
737
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
738
ip, port);
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
739
755
}
740
756
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
741
757
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
751
767
perror_plus("inet_ntop");
752
768
} else {
753
769
if(strcmp(addrstr, ip) != 0){
754
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
755
772
}
756
773
}
757
774
}
785
802
while(true){
786
803
size_t out_size = strlen(out);
787
804
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
788
out_size - written));
805
out_size - written));
789
806
if(ret == -1){
790
807
int e = errno;
791
808
perror_plus("write");
811
828
}
812
829
813
830
if(debug){
814
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
831
fprintf(stderr, "Mandos plugin mandos-client: "
832
"Establishing TLS session with %s\n", ip);
815
833
}
816
834
817
835
if(quit_now){
837
855
838
856
if(ret != GNUTLS_E_SUCCESS){
839
857
if(debug){
840
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
841
860
gnutls_perror(ret);
842
861
}
843
862
errno = EPROTO;
847
866
/* Read OpenPGP packet that contains the wanted password */
848
867
849
868
if(debug){
850
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
851
" %s\n", ip);
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
852
871
}
853
872
854
873
while(true){
859
878
}
860
879
861
880
buffer_capacity = incbuffer(&buffer, buffer_length,
862
buffer_capacity);
881
buffer_capacity);
863
882
if(buffer_capacity == 0){
864
883
int e = errno;
865
884
perror_plus("incbuffer");
892
911
}
893
912
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
894
913
if(ret < 0){
895
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
896
"***\n");
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
897
916
gnutls_perror(ret);
898
917
errno = EPROTO;
899
918
goto mandos_end;
900
919
}
901
920
break;
902
921
default:
903
fprintf_plus(stderr, "Unknown error while reading data from"
904
" encrypted session with Mandos server\n");
922
fprintf(stderr, "Mandos plugin mandos-client: "
923
"Unknown error while reading data from"
924
" encrypted session with Mandos server\n");
905
925
gnutls_bye(session, GNUTLS_SHUT_RDWR);
906
926
errno = EIO;
907
927
goto mandos_end;
912
932
}
913
933
914
934
if(debug){
915
fprintf_plus(stderr, "Closing TLS session\n");
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
916
937
}
917
938
918
939
if(quit_now){
930
951
931
952
if(buffer_length > 0){
932
953
ssize_t decrypted_buffer_size;
933
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
954
decrypted_buffer_size = pgp_packet_decrypt(buffer,
955
buffer_length,
934
956
&decrypted_buffer);
935
957
if(decrypted_buffer_size >= 0){
936
958
947
969
if(ret == 0 and ferror(stdout)){
948
970
int e = errno;
949
971
if(debug){
950
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
951
strerror(errno));
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
974
strerror(errno));
952
975
}
953
976
errno = e;
954
977
goto mandos_end;
1011
1034
switch(event){
1012
1035
default:
1013
1036
case AVAHI_RESOLVER_FAILURE:
1014
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1015
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
domain,
1017
avahi_strerror(avahi_server_errno(mc.server)));
1037
fprintf(stderr, "Mandos plugin mandos-client: "
1038
"(Avahi Resolver) Failed to resolve service '%s'"
1039
" of type '%s' in domain '%s': %s\n", name, type, domain,
1040
avahi_strerror(avahi_server_errno(mc.server)));
1018
1041
break;
1019
1042
1020
1043
case AVAHI_RESOLVER_FOUND:
1022
1045
char ip[AVAHI_ADDRESS_STR_MAX];
1023
1046
avahi_address_snprint(ip, sizeof(ip), address);
1024
1047
if(debug){
1025
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1026
PRIdMAX ") on port %" PRIu16 "\n", name,
1027
host_name, ip, (intmax_t)interface, port);
1048
fprintf(stderr, "Mandos plugin mandos-client: "
1049
"Mandos server \"%s\" found on %s (%s, %"
1050
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1051
ip, (intmax_t)interface, port);
1028
1052
}
1029
1053
int ret = start_mandos_communication(ip, port, interface,
1030
1054
avahi_proto_to_af(proto));
1031
1055
if(ret == 0){
1032
1056
avahi_simple_poll_quit(mc.simple_poll);
1033
1057
} else {
1034
if(not add_server(ip, port, interface,
1035
avahi_proto_to_af(proto))){
1036
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1037
" list\n", name);
1038
}
1058
ret = add_server(ip, port, interface,
1059
avahi_proto_to_af(proto));
1039
1060
}
1040
1061
}
1041
1062
}
1065
1086
default:
1066
1087
case AVAHI_BROWSER_FAILURE:
1067
1088
1068
fprintf_plus(stderr, "(Avahi browser) %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
1089
fprintf(stderr, "Mandos plugin mandos-client: "
1090
"(Avahi browser) %s\n",
1091
avahi_strerror(avahi_server_errno(mc.server)));
1070
1092
avahi_simple_poll_quit(mc.simple_poll);
1071
1093
return;
1072
1094
1079
1101
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1080
1102
name, type, domain, protocol, 0,
1081
1103
resolve_callback, NULL) == NULL)
1082
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1083
" %s\n", name,
1084
avahi_strerror(avahi_server_errno(mc.server)));
1104
fprintf(stderr, "Mandos plugin mandos-client: "
1105
"Avahi: Failed to resolve service '%s': %s\n",
1106
name, avahi_strerror(avahi_server_errno(mc.server)));
1085
1107
break;
1086
1108
1087
1109
case AVAHI_BROWSER_REMOVE:
1090
1112
case AVAHI_BROWSER_ALL_FOR_NOW:
1091
1113
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1092
1114
if(debug){
1093
fprintf_plus(stderr, "No Mandos server found, still"
1094
" searching...\n");
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1095
1117
}
1096
1118
break;
1097
1119
}
1136
1158
/* Reject the loopback device */
1137
1159
if(ifr->ifr_flags & IFF_LOOPBACK){
1138
1160
if(debug){
1139
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1140
ifname);
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1141
1163
}
1142
1164
return false;
1143
1165
}
1144
1166
/* Accept point-to-point devices only if connect_to is specified */
1145
1167
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1146
1168
if(debug){
1147
fprintf_plus(stderr, "Accepting point-to-point interface"
1148
" \"%s\"\n", ifname);
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1149
1171
}
1150
1172
return true;
1151
1173
}
1152
1174
/* Otherwise, reject non-broadcast-capable devices */
1153
1175
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1154
1176
if(debug){
1155
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1156
" \"%s\"\n", ifname);
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1157
1179
}
1158
1180
return false;
1159
1181
}
1160
1182
/* Reject non-ARP interfaces (including dummy interfaces) */
1161
1183
if(ifr->ifr_flags & IFF_NOARP){
1162
1184
if(debug){
1163
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
ifname);
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1165
1187
}
1166
1188
return false;
1167
1189
}
1168
1190
1169
1191
/* Accept this device */
1170
1192
if(debug){
1171
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1172
1195
}
1173
1196
return true;
1174
1197
}
1186
1209
struct ifreq ifr;
1187
1210
if(not get_flags(if_entry->d_name, &ifr)){
1188
1211
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface "
1190
"\"%s\"\n", if_entry->d_name);
1212
fprintf(stderr, "Mandos plugin mandos-client: "
1213
"Failed to get flags for interface \"%s\"\n",
1214
if_entry->d_name);
1191
1215
}
1192
1216
return 0;
1193
1217
}
1211
1235
struct ifreq ifr;
1212
1236
if(not get_flags(if_entry->d_name, &ifr)){
1213
1237
if(debug){
1214
fprintf_plus(stderr, "Failed to get flags for interface "
1215
"\"%s\"\n", if_entry->d_name);
1238
fprintf(stderr, "Mandos plugin mandos-client: "
1239
"Failed to get flags for interface \"%s\"\n",
1240
if_entry->d_name);
1216
1241
}
1217
1242
return 0;
1218
1243
}
1220
1245
/* Reject down interfaces */
1221
1246
if(not (ifr.ifr_flags & IFF_UP)){
1222
1247
if(debug){
1223
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
if_entry->d_name);
1248
fprintf(stderr, "Mandos plugin mandos-client: "
1249
"Rejecting down interface \"%s\"\n",
1250
if_entry->d_name);
1225
1251
}
1226
1252
return 0;
1227
1253
}
1229
1255
/* Reject non-running interfaces */
1230
1256
if(not (ifr.ifr_flags & IFF_RUNNING)){
1231
1257
if(debug){
1232
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if_entry->d_name);
1258
fprintf(stderr, "Mandos plugin mandos-client: "
1259
"Rejecting non-running interface \"%s\"\n",
1260
if_entry->d_name);
1234
1261
}
1235
1262
return 0;
1236
1263
}
1255
1282
/* Is this directory entry a runnable program? */
1256
1283
int runnable_hook(const struct dirent *direntry){
1257
1284
int ret;
1258
size_t sret;
1259
1285
struct stat st;
1260
1286
1261
1287
if((direntry->d_name)[0] == '\0'){
1263
1289
return 0;
1264
1290
}
1265
1291
1266
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1267
"abcdefghijklmnopqrstuvwxyz"
1268
"0123456789"
1269
"_-");
1270
if((direntry->d_name)[sret] != '\0'){
1271
/* Contains non-allowed characters */
1272
if(debug){
1273
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
direntry->d_name);
1275
}
1276
return 0;
1277
}
1292
/* Save pointer to last character */
1293
char *end = strchr(direntry->d_name, '\0')-1;
1294
1295
if(*end == '~'){
1296
/* Backup name~ */
1297
return 0;
1298
}
1299
1300
if(((direntry->d_name)[0] == '#')
1301
and (*end == '#')){
1302
/* Temporary #name# */
1303
return 0;
1304
}
1305
1306
/* XXX more rules here */
1278
1307
1279
1308
char *fullname = NULL;
1280
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1309
ret = asprintf(&fullname, "%s/%s", hookdir,
1310
direntry->d_name);
1281
1311
if(ret < 0){
1282
1312
perror_plus("asprintf");
1283
1313
return 0;
1286
1316
ret = stat(fullname, &st);
1287
1317
if(ret == -1){
1288
1318
if(debug){
1289
perror_plus("Could not stat hook");
1319
perror_plus("Could not stat plugin");
1290
1320
}
1291
1321
return 0;
1292
1322
}
1293
1323
if(not (S_ISREG(st.st_mode))){
1294
1324
/* Not a regular file */
1295
if(debug){
1296
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1297
direntry->d_name);
1298
}
1299
1325
return 0;
1300
1326
}
1301
1327
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1302
1328
/* Not executable */
1303
if(debug){
1304
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
direntry->d_name);
1306
}
1307
1329
return 0;
1308
1330
}
1309
if(debug){
1310
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
direntry->d_name);
1312
}
1313
1331
return 1;
1314
1332
}
1315
1333
1322
1340
while(true){
1323
1341
if(mc.current_server == NULL){
1324
1342
if (debug){
1325
fprintf_plus(stderr, "Wait until first server is found."
1326
" No timeout!\n");
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1344
"Wait until first server is found. No timeout!\n");
1327
1345
}
1328
1346
ret = avahi_simple_poll_iterate(s, -1);
1329
1347
} else {
1330
1348
if (debug){
1331
fprintf_plus(stderr, "Check current_server if we should run"
1332
" it, or wait\n");
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1351
" or wait\n");
1333
1352
}
1334
1353
/* the current time */
1335
1354
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1351
1370
- ((intmax_t)waited_time.tv_nsec / 1000000));
1352
1371
1353
1372
if (debug){
1354
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1355
block_time);
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1356
1375
}
1357
1376
1358
1377
if(block_time <= 0){
1385
1404
}
1386
1405
}
1387
1406
1388
bool run_network_hooks(const char *mode, const char *interface,
1389
const float delay){
1390
struct dirent **direntries;
1391
struct dirent *direntry;
1392
int ret;
1393
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1394
alphasort);
1395
if(numhooks == -1){
1396
perror_plus("scandir");
1397
} else {
1398
int devnull = open("/dev/null", O_RDONLY);
1399
for(int i = 0; i < numhooks; i++){
1400
direntry = direntries[i];
1401
char *fullname = NULL;
1402
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1403
if(ret < 0){
1404
perror_plus("asprintf");
1405
continue;
1406
}
1407
if(debug){
1408
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1409
direntry->d_name);
1410
}
1411
pid_t hook_pid = fork();
1412
if(hook_pid == 0){
1413
/* Child */
1414
/* Raise privileges */
1415
errno = 0;
1416
ret = seteuid(0);
1417
if(ret == -1){
1418
perror_plus("seteuid");
1419
}
1420
/* Raise privileges even more */
1421
errno = 0;
1422
ret = setuid(0);
1423
if(ret == -1){
1424
perror_plus("setuid");
1425
}
1426
/* Set group */
1427
errno = 0;
1428
ret = setgid(0);
1429
if(ret == -1){
1430
perror_plus("setgid");
1431
}
1432
/* Reset supplementary groups */
1433
errno = 0;
1434
ret = setgroups(0, NULL);
1435
if(ret == -1){
1436
perror_plus("setgroups");
1437
}
1438
dup2(devnull, STDIN_FILENO);
1439
close(devnull);
1440
dup2(STDERR_FILENO, STDOUT_FILENO);
1441
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1442
if(ret == -1){
1443
perror_plus("setenv");
1444
_exit(EX_OSERR);
1445
}
1446
ret = setenv("DEVICE", interface, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("MODE", mode, 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
char *delaystring;
1462
ret = asprintf(&delaystring, "%f", delay);
1463
if(ret == -1){
1464
perror_plus("asprintf");
1465
_exit(EX_OSERR);
1466
}
1467
ret = setenv("DELAY", delaystring, 1);
1468
if(ret == -1){
1469
free(delaystring);
1470
perror_plus("setenv");
1471
_exit(EX_OSERR);
1472
}
1473
free(delaystring);
1474
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1475
perror_plus("execl");
1476
_exit(EXIT_FAILURE);
1477
}
1478
} else {
1479
int status;
1480
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1481
perror_plus("waitpid");
1482
free(fullname);
1483
continue;
1484
}
1485
if(WIFEXITED(status)){
1486
if(WEXITSTATUS(status) != 0){
1487
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1488
" with status %d\n", direntry->d_name,
1489
WEXITSTATUS(status));
1490
free(fullname);
1491
continue;
1492
}
1493
} else if(WIFSIGNALED(status)){
1494
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1495
" signal %d\n", direntry->d_name,
1496
WTERMSIG(status));
1497
free(fullname);
1498
continue;
1499
} else {
1500
fprintf_plus(stderr, "Warning: network hook \"%s\""
1501
" crashed\n", direntry->d_name);
1502
free(fullname);
1503
continue;
1504
}
1505
}
1506
free(fullname);
1507
if(debug){
1508
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1509
direntry->d_name);
1510
}
1511
}
1512
close(devnull);
1513
}
1514
return true;
1515
}
1516
1517
1407
int main(int argc, char *argv[]){
1518
1408
AvahiSServiceBrowser *sb = NULL;
1519
1409
int error;
1677
1567
argp_state_help(state, state->out_stream,
1678
1568
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1679
1569
case 'V': /* --version */
1680
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1570
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1571
fprintf(state->out_stream, "%s\n", argp_program_version);
1681
1572
exit(argp_err_exit_status);
1682
1573
break;
1683
1574
default:
1710
1601
{
1711
1602
/* Work around Debian bug #633582:
1712
1603
<http://bugs.debian.org/633582> */
1604
struct stat st;
1713
1605
1714
1606
/* Re-raise priviliges */
1715
1607
errno = 0;
1716
1608
ret = seteuid(0);
1717
1609
if(ret == -1){
1718
1610
perror_plus("seteuid");
1611
}
1612
1613
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1614
int seckey_fd = open(seckey, O_RDONLY);
1615
if(seckey_fd == -1){
1616
perror_plus("open");
1617
} else {
1618
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1619
if(ret == -1){
1620
perror_plus("fstat");
1621
} else {
1622
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1623
ret = fchown(seckey_fd, uid, gid);
1624
if(ret == -1){
1625
perror_plus("fchown");
1626
}
1627
}
1628
}
1629
TEMP_FAILURE_RETRY(close(seckey_fd));
1630
}
1631
}
1632
1633
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1634
int pubkey_fd = open(pubkey, O_RDONLY);
1635
if(pubkey_fd == -1){
1636
perror_plus("open");
1637
} else {
1638
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1639
if(ret == -1){
1640
perror_plus("fstat");
1641
} else {
1642
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1643
ret = fchown(pubkey_fd, uid, gid);
1644
if(ret == -1){
1645
perror_plus("fchown");
1646
}
1647
}
1648
}
1649
TEMP_FAILURE_RETRY(close(pubkey_fd));
1650
}
1651
}
1652
1653
/* Lower privileges */
1654
errno = 0;
1655
ret = seteuid(uid);
1656
if(ret == -1){
1657
perror_plus("seteuid");
1658
}
1659
}
1660
1661
/* Find network hooks and run them */
1662
{
1663
struct dirent **direntries;
1664
struct dirent *direntry;
1665
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1666
alphasort);
1667
if(numhooks == -1){
1668
perror_plus("scandir");
1719
1669
} else {
1720
struct stat st;
1721
1722
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1723
int seckey_fd = open(seckey, O_RDONLY);
1724
if(seckey_fd == -1){
1725
perror_plus("open");
1726
} else {
1727
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1728
if(ret == -1){
1729
perror_plus("fstat");
1730
} else {
1731
if(S_ISREG(st.st_mode)
1732
and st.st_uid == 0 and st.st_gid == 0){
1733
ret = fchown(seckey_fd, uid, gid);
1734
if(ret == -1){
1735
perror_plus("fchown");
1736
}
1737
}
1738
}
1739
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
}
1741
}
1742
1743
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1744
int pubkey_fd = open(pubkey, O_RDONLY);
1745
if(pubkey_fd == -1){
1746
perror_plus("open");
1747
} else {
1748
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1749
if(ret == -1){
1750
perror_plus("fstat");
1751
} else {
1752
if(S_ISREG(st.st_mode)
1753
and st.st_uid == 0 and st.st_gid == 0){
1754
ret = fchown(pubkey_fd, uid, gid);
1755
if(ret == -1){
1756
perror_plus("fchown");
1757
}
1758
}
1759
}
1760
TEMP_FAILURE_RETRY(close(pubkey_fd));
1761
}
1762
}
1763
1764
/* Lower privileges */
1765
errno = 0;
1766
ret = seteuid(uid);
1767
if(ret == -1){
1768
perror_plus("seteuid");
1769
}
1670
int devnull = open("/dev/null", O_RDONLY);
1671
for(int i = 0; i < numhooks; i++){
1672
direntry = direntries[0];
1673
char *fullname = NULL;
1674
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1675
if(ret < 0){
1676
perror_plus("asprintf");
1677
continue;
1678
}
1679
pid_t hook_pid = fork();
1680
if(hook_pid == 0){
1681
/* Child */
1682
dup2(devnull, STDIN_FILENO);
1683
close(devnull);
1684
dup2(STDERR_FILENO, STDOUT_FILENO);
1685
ret = setenv("DEVICE", interface, 1);
1686
if(ret == -1){
1687
perror_plus("setenv");
1688
exit(1);
1689
}
1690
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1691
if(ret == -1){
1692
perror_plus("setenv");
1693
exit(1);
1694
}
1695
ret = setenv("MODE", "start", 1);
1696
if(ret == -1){
1697
perror_plus("setenv");
1698
exit(1);
1699
}
1700
char *delaystring;
1701
ret = asprintf(&delaystring, "%f", delay);
1702
if(ret == -1){
1703
perror_plus("asprintf");
1704
exit(1);
1705
}
1706
ret = setenv("DELAY", delaystring, 1);
1707
if(ret == -1){
1708
free(delaystring);
1709
perror_plus("setenv");
1710
exit(1);
1711
}
1712
free(delaystring);
1713
ret = execl(fullname, direntry->d_name, "start", NULL);
1714
perror_plus("execl");
1715
} else {
1716
int status;
1717
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1718
perror_plus("waitpid");
1719
free(fullname);
1720
continue;
1721
}
1722
if(WIFEXITED(status)){
1723
if(WEXITSTATUS(status) != 0){
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" exited"
1726
" with status %d\n", direntry->d_name,
1727
WEXITSTATUS(status));
1728
free(fullname);
1729
continue;
1730
}
1731
} else if(WIFSIGNALED(status)){
1732
fprintf(stderr, "Mandos plugin mandos-client: "
1733
"Warning: network hook \"%s\" died by"
1734
" signal %d\n", direntry->d_name,
1735
WTERMSIG(status));
1736
free(fullname);
1737
continue;
1738
} else {
1739
fprintf(stderr, "Mandos plugin mandos-client: "
1740
"Warning: network hook \"%s\" crashed\n",
1741
direntry->d_name);
1742
free(fullname);
1743
continue;
1744
}
1745
}
1746
free(fullname);
1747
if(quit_now){
1748
goto end;
1749
}
1750
}
1751
close(devnull);
1770
1752
}
1771
1753
}
1772
1754
1773
/* Run network hooks */
1774
if(not run_network_hooks("start", interface, delay)){
1775
goto end;
1776
}
1777
1778
1755
if(not debug){
1779
1756
avahi_set_log_function(empty_log);
1780
1757
}
1794
1771
/* Pick the first interface returned */
1795
1772
interface = strdup(direntries[0]->d_name);
1796
1773
if(debug){
1797
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1798
1776
}
1799
1777
if(interface == NULL){
1800
1778
perror_plus("malloc");
1805
1783
free(direntries);
1806
1784
} else {
1807
1785
free(direntries);
1808
fprintf_plus(stderr, "Could not find a network interface\n");
1786
fprintf(stderr, "Mandos plugin mandos-client: "
1787
"Could not find a network interface\n");
1809
1788
exitcode = EXIT_FAILURE;
1810
1789
goto end;
1811
1790
}
1817
1796
srand((unsigned int) time(NULL));
1818
1797
mc.simple_poll = avahi_simple_poll_new();
1819
1798
if(mc.simple_poll == NULL){
1820
fprintf_plus(stderr,
1821
"Avahi: Failed to create simple poll object.\n");
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
1822
1801
exitcode = EX_UNAVAILABLE;
1823
1802
goto end;
1824
1803
}
1890
1869
if(strcmp(interface, "none") != 0){
1891
1870
if_index = (AvahiIfIndex) if_nametoindex(interface);
1892
1871
if(if_index == 0){
1893
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1894
1874
exitcode = EX_UNAVAILABLE;
1895
1875
goto end;
1896
1876
}
2016
1996
#endif /* __linux__ */
2017
1997
/* Lower privileges */
2018
1998
errno = 0;
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
1999
if(take_down_interface){
2000
/* Lower privileges */
2001
ret = seteuid(uid);
2002
if(ret == -1){
2003
perror_plus("seteuid");
2004
}
2005
} else {
2006
/* Lower privileges permanently */
2007
ret = setuid(uid);
2008
if(ret == -1){
2009
perror_plus("setuid");
2010
}
2023
2011
}
2024
2012
}
2025
2013
2029
2017
2030
2018
ret = init_gnutls_global(pubkey, seckey);
2031
2019
if(ret == -1){
2032
fprintf_plus(stderr, "init_gnutls_global failed\n");
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
2033
2022
exitcode = EX_UNAVAILABLE;
2034
2023
goto end;
2035
2024
} else {
2051
2040
}
2052
2041
2053
2042
if(not init_gpgme(pubkey, seckey, tempdir)){
2054
fprintf_plus(stderr, "init_gpgme failed\n");
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
2055
2045
exitcode = EX_UNAVAILABLE;
2056
2046
goto end;
2057
2047
} else {
2067
2057
/* (Mainly meant for debugging) */
2068
2058
char *address = strrchr(connect_to, ':');
2069
2059
if(address == NULL){
2070
fprintf_plus(stderr, "No colon in address\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
2071
2062
exitcode = EX_USAGE;
2072
2063
goto end;
2073
2064
}
2081
2072
tmpmax = strtoimax(address+1, &tmp, 10);
2082
2073
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2083
2074
or tmpmax != (uint16_t)tmpmax){
2084
fprintf_plus(stderr, "Bad port number\n");
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
2085
2077
exitcode = EX_USAGE;
2086
2078
goto end;
2087
2079
}
2117
2109
break;
2118
2110
}
2119
2111
if(debug){
2120
fprintf_plus(stderr, "Retrying in %d seconds\n",
2121
(int)retry_interval);
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
2122
2114
}
2123
2115
sleep((int)retry_interval);
2124
2116
}
2154
2146
2155
2147
/* Check if creating the Avahi server object succeeded */
2156
2148
if(mc.server == NULL){
2157
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2158
avahi_strerror(error));
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
2151
avahi_strerror(error));
2159
2152
exitcode = EX_UNAVAILABLE;
2160
2153
goto end;
2161
2154
}
2169
2162
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2170
2163
NULL, 0, browse_callback, NULL);
2171
2164
if(sb == NULL){
2172
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2165
fprintf(stderr, "Mandos plugin mandos-client: "
2166
"Failed to create service browser: %s\n",
2167
avahi_strerror(avahi_server_errno(mc.server)));
2174
2168
exitcode = EX_UNAVAILABLE;
2175
2169
goto end;
2176
2170
}
2182
2176
/* Run the main loop */
2183
2177
2184
2178
if(debug){
2185
fprintf_plus(stderr, "Starting Avahi loop search\n");
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
2186
2181
}
2187
2182
2188
2183
ret = avahi_loop_with_timeout(mc.simple_poll,
2189
2184
(int)(retry_interval * 1000));
2190
2185
if(debug){
2191
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2192
(ret == 0) ? "successfully" : "with error");
2186
fprintf(stderr, "Mandos plugin mandos-client: "
2187
"avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2193
2189
}
2194
2190
2195
2191
end:
2196
2192
2197
2193
if(debug){
2198
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
2199
2196
}
2200
2197
2201
2198
/* Cleanup things */
2217
2214
if(gpgme_initialized){
2218
2215
gpgme_release(mc.ctx);
2219
2216
}
2220
2217
2221
2218
/* Cleans up the circular linked list of Mandos servers the client
2222
2219
has seen */
2223
2220
if(mc.current_server != NULL){
2229
2226
}
2230
2227
}
2231
2228
2232
/* Run network hooks */
2233
run_network_hooks("stop", interface, delay);
2229
/* XXX run network hooks "stop" here */
2234
2230
2235
/* Re-raise priviliges */
2236
{
2231
/* Take down the network interface */
2232
if(take_down_interface){
2233
/* Re-raise priviliges */
2237
2234
errno = 0;
2238
2235
ret = seteuid(0);
2239
2236
if(ret == -1){
2240
2237
perror_plus("seteuid");
2241
2238
}
2242
2243
/* Take down the network interface */
2244
if(take_down_interface and geteuid() == 0){
2239
if(geteuid() == 0){
2245
2240
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2246
2241
if(ret == -1){
2247
2242
perror_plus("ioctl SIOCGIFFLAGS");
2256
2251
if(ret == -1){
2257
2252
perror_plus("close");
2258
2253
}
2254
/* Lower privileges permanently */
2255
errno = 0;
2256
ret = setuid(uid);
2257
if(ret == -1){
2258
perror_plus("setuid");
2259
}
2259
2260
}
2260
2261
}
2261
/* Lower privileges permanently */
2262
errno = 0;
2263
ret = setuid(uid);
2264
if(ret == -1){
2265
perror_plus("setuid");
2266
}
2267
2262
2268
2263
/* Removes the GPGME temp directory and all files inside */
2269
2264
if(tempdir_created){
2283
2278
}
2284
2279
ret = remove(fullname);
2285
2280
if(ret == -1){
2286
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2287
strerror(errno));
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2288
2283
}
2289
2284
free(fullname);
2290
2285
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0