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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
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() */
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
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,
193
180
* "buffer_length" is how much is already used.
194
181
*/
195
182
size_t incbuffer(char **buffer, size_t buffer_length,
196
size_t buffer_capacity){
183
size_t buffer_capacity){
197
184
if(buffer_length + BUFFER_SIZE > buffer_capacity){
198
185
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
199
186
if(buffer == NULL){
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,
196
AvahiIfIndex if_index,
197
int af){
210
198
int ret;
211
199
server *new_server = malloc(sizeof(server));
212
200
if(new_server == NULL){
213
201
perror_plus("malloc");
214
return false;
202
return -1;
215
203
}
216
204
*new_server = (server){ .ip = strdup(ip),
217
.port = port,
218
.if_index = if_index,
219
.af = af };
205
.port = port,
206
.if_index = if_index,
207
.af = af };
220
208
if(new_server->ip == NULL){
221
209
perror_plus("strdup");
222
return false;
210
return -1;
223
211
}
224
212
/* Special case of first server */
225
213
if (mc.current_server == NULL){
236
224
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
237
225
if(ret == -1){
238
226
perror_plus("clock_gettime");
239
return false;
227
return -1;
240
228
}
241
return true;
229
return 0;
242
230
}
243
231
244
232
/*
245
233
* Initialize GPGME.
246
234
*/
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
235
static bool init_gpgme(const char *seckey,
236
const char *pubkey, const char *tempdir){
249
237
gpgme_error_t rc;
250
238
gpgme_engine_info_t engine_info;
251
239
266
254
267
255
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
256
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));
257
fprintf(stderr, "Mandos plugin mandos-client: "
258
"bad gpgme_data_new_from_fd: %s: %s\n",
259
gpgme_strsource(rc), gpgme_strerror(rc));
271
260
return false;
272
261
}
273
262
274
263
rc = gpgme_op_import(mc.ctx, pgp_data);
275
264
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
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));
278
268
return false;
279
269
}
280
270
287
277
}
288
278
289
279
if(debug){
290
fprintf_plus(stderr, "Initializing GPGME\n");
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
291
282
}
292
283
293
284
/* Init GPGME */
294
285
gpgme_check_version(NULL);
295
286
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
296
287
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));
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
299
291
return false;
300
292
}
301
293
302
294
/* Set GPGME home directory for the OpenPGP engine only */
303
295
rc = gpgme_get_engine_info(&engine_info);
304
296
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));
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
307
300
return false;
308
301
}
309
302
while(engine_info != NULL){
315
308
engine_info = engine_info->next;
316
309
}
317
310
if(engine_info == NULL){
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
320
313
return false;
321
314
}
322
315
323
316
/* Create new GPGME "context" */
324
317
rc = gpgme_new(&(mc.ctx));
325
318
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));
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
329
322
return false;
330
323
}
331
324
350
343
ssize_t plaintext_length = 0;
351
344
352
345
if(debug){
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
354
348
}
355
349
356
350
/* Create new GPGME data buffer from memory cryptotext */
357
351
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
358
352
0);
359
353
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));
354
fprintf(stderr, "Mandos plugin mandos-client: "
355
"bad gpgme_data_new_from_mem: %s: %s\n",
356
gpgme_strsource(rc), gpgme_strerror(rc));
362
357
return -1;
363
358
}
364
359
365
360
/* Create new empty GPGME data buffer for the plaintext */
366
361
rc = gpgme_data_new(&dh_plain);
367
362
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));
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
365
gpgme_strsource(rc), gpgme_strerror(rc));
371
366
gpgme_data_release(dh_crypto);
372
367
return -1;
373
368
}
376
371
data buffer */
377
372
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
378
373
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
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));
381
377
plaintext_length = -1;
382
378
if(debug){
383
379
gpgme_decrypt_result_t result;
384
380
result = gpgme_op_decrypt_result(mc.ctx);
385
381
if(result == NULL){
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
387
384
} 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);
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);
392
391
if(result->file_name != NULL){
393
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);
394
394
}
395
395
gpgme_recipient_t recipient;
396
396
recipient = result->recipients;
397
397
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");
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");
405
407
recipient = recipient->next;
406
408
}
407
409
}
410
412
}
411
413
412
414
if(debug){
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
414
417
}
415
418
416
419
/* Seek back to the beginning of the GPGME plaintext data buffer */
423
426
*plaintext = NULL;
424
427
while(true){
425
428
plaintext_capacity = incbuffer(plaintext,
426
(size_t)plaintext_length,
427
plaintext_capacity);
429
(size_t)plaintext_length,
430
plaintext_capacity);
428
431
if(plaintext_capacity == 0){
429
perror_plus("incbuffer");
430
plaintext_length = -1;
431
goto decrypt_end;
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
432
435
}
433
436
434
437
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
447
450
}
448
451
449
452
if(debug){
450
fprintf_plus(stderr, "Decrypted password is: ");
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
451
455
for(ssize_t i = 0; i < plaintext_length; i++){
452
456
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
453
457
}
475
479
/* GnuTLS log function callback */
476
480
static void debuggnutls(__attribute__((unused)) int level,
477
481
const char* string){
478
fprintf_plus(stderr, "GnuTLS: %s", string);
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
479
483
}
480
484
481
485
static int init_gnutls_global(const char *pubkeyfilename,
483
487
int ret;
484
488
485
489
if(debug){
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
487
492
}
488
493
489
494
ret = gnutls_global_init();
490
495
if(ret != GNUTLS_E_SUCCESS){
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
493
498
return -1;
494
499
}
495
500
504
509
/* OpenPGP credentials */
505
510
ret = gnutls_certificate_allocate_credentials(&mc.cred);
506
511
if(ret != GNUTLS_E_SUCCESS){
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
509
514
gnutls_global_deinit();
510
515
return -1;
511
516
}
512
517
513
518
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);
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);
518
523
}
519
524
520
525
ret = gnutls_certificate_set_openpgp_key_file
521
526
(mc.cred, pubkeyfilename, seckeyfilename,
522
527
GNUTLS_OPENPGP_FMT_BASE64);
523
528
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));
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));
529
535
goto globalfail;
530
536
}
531
537
532
538
/* GnuTLS server initialization */
533
539
ret = gnutls_dh_params_init(&mc.dh_params);
534
540
if(ret != GNUTLS_E_SUCCESS){
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
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));
538
544
goto globalfail;
539
545
}
540
546
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
541
547
if(ret != GNUTLS_E_SUCCESS){
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
550
safer_gnutls_strerror(ret));
544
551
goto globalfail;
545
552
}
546
553
566
573
}
567
574
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
568
575
if(ret != GNUTLS_E_SUCCESS){
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
578
safer_gnutls_strerror(ret));
572
579
}
573
580
574
581
{
581
588
}
582
589
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
583
590
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));
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));
587
595
gnutls_deinit(*session);
588
596
return -1;
589
597
}
598
606
}
599
607
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
600
608
if(ret != GNUTLS_E_SUCCESS){
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
611
safer_gnutls_strerror(ret));
603
612
gnutls_deinit(*session);
604
613
return -1;
605
614
}
650
659
pf = PF_INET;
651
660
break;
652
661
default:
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
654
664
errno = EINVAL;
655
665
return -1;
656
666
}
661
671
}
662
672
663
673
if(debug){
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
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);
666
677
}
667
678
668
679
tcp_sd = socket(pf, SOCK_STREAM, 0);
694
705
}
695
706
if(ret == 0){
696
707
int e = errno;
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
698
710
errno = e;
699
711
goto mandos_end;
700
712
}
705
717
706
718
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
707
719
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
708
-Wunreachable-code*/
720
-Wunreachable-code*/
709
721
if(if_index == AVAHI_IF_UNSPEC){
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" 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");
712
725
errno = EINVAL;
713
726
goto mandos_end;
714
727
}
732
745
if(if_indextoname((unsigned int)if_index, interface) == NULL){
733
746
perror_plus("if_indextoname");
734
747
} else {
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
750
ip, interface, port);
737
751
}
738
752
} else {
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
741
755
}
742
756
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
743
757
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
753
767
perror_plus("inet_ntop");
754
768
} else {
755
769
if(strcmp(addrstr, ip) != 0){
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
757
772
}
758
773
}
759
774
}
787
802
while(true){
788
803
size_t out_size = strlen(out);
789
804
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
790
out_size - written));
805
out_size - written));
791
806
if(ret == -1){
792
807
int e = errno;
793
808
perror_plus("write");
813
828
}
814
829
815
830
if(debug){
816
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);
817
833
}
818
834
819
835
if(quit_now){
839
855
840
856
if(ret != GNUTLS_E_SUCCESS){
841
857
if(debug){
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
843
860
gnutls_perror(ret);
844
861
}
845
862
errno = EPROTO;
849
866
/* Read OpenPGP packet that contains the wanted password */
850
867
851
868
if(debug){
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
854
871
}
855
872
856
873
while(true){
861
878
}
862
879
863
880
buffer_capacity = incbuffer(&buffer, buffer_length,
864
buffer_capacity);
881
buffer_capacity);
865
882
if(buffer_capacity == 0){
866
883
int e = errno;
867
884
perror_plus("incbuffer");
894
911
}
895
912
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
896
913
if(ret < 0){
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
899
916
gnutls_perror(ret);
900
917
errno = EPROTO;
901
918
goto mandos_end;
902
919
}
903
920
break;
904
921
default:
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" 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");
907
925
gnutls_bye(session, GNUTLS_SHUT_RDWR);
908
926
errno = EIO;
909
927
goto mandos_end;
914
932
}
915
933
916
934
if(debug){
917
fprintf_plus(stderr, "Closing TLS session\n");
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
918
937
}
919
938
920
939
if(quit_now){
932
951
933
952
if(buffer_length > 0){
934
953
ssize_t decrypted_buffer_size;
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
954
decrypted_buffer_size = pgp_packet_decrypt(buffer,
955
buffer_length,
936
956
&decrypted_buffer);
937
957
if(decrypted_buffer_size >= 0){
938
958
949
969
if(ret == 0 and ferror(stdout)){
950
970
int e = errno;
951
971
if(debug){
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
974
strerror(errno));
954
975
}
955
976
errno = e;
956
977
goto mandos_end;
1013
1034
switch(event){
1014
1035
default:
1015
1036
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)));
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)));
1020
1041
break;
1021
1042
1022
1043
case AVAHI_RESOLVER_FOUND:
1024
1045
char ip[AVAHI_ADDRESS_STR_MAX];
1025
1046
avahi_address_snprint(ip, sizeof(ip), address);
1026
1047
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);
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);
1030
1052
}
1031
1053
int ret = start_mandos_communication(ip, port, interface,
1032
1054
avahi_proto_to_af(proto));
1033
1055
if(ret == 0){
1034
1056
avahi_simple_poll_quit(mc.simple_poll);
1035
1057
} 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
}
1058
ret = add_server(ip, port, interface,
1059
avahi_proto_to_af(proto));
1041
1060
}
1042
1061
}
1043
1062
}
1067
1086
default:
1068
1087
case AVAHI_BROWSER_FAILURE:
1069
1088
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
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)));
1072
1092
avahi_simple_poll_quit(mc.simple_poll);
1073
1093
return;
1074
1094
1081
1101
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1082
1102
name, type, domain, protocol, 0,
1083
1103
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)));
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)));
1087
1107
break;
1088
1108
1089
1109
case AVAHI_BROWSER_REMOVE:
1092
1112
case AVAHI_BROWSER_ALL_FOR_NOW:
1093
1113
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1094
1114
if(debug){
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1097
1117
}
1098
1118
break;
1099
1119
}
1138
1158
/* Reject the loopback device */
1139
1159
if(ifr->ifr_flags & IFF_LOOPBACK){
1140
1160
if(debug){
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1143
1163
}
1144
1164
return false;
1145
1165
}
1146
1166
/* Accept point-to-point devices only if connect_to is specified */
1147
1167
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1148
1168
if(debug){
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1151
1171
}
1152
1172
return true;
1153
1173
}
1154
1174
/* Otherwise, reject non-broadcast-capable devices */
1155
1175
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1156
1176
if(debug){
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1159
1179
}
1160
1180
return false;
1161
1181
}
1162
1182
/* Reject non-ARP interfaces (including dummy interfaces) */
1163
1183
if(ifr->ifr_flags & IFF_NOARP){
1164
1184
if(debug){
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1167
1187
}
1168
1188
return false;
1169
1189
}
1170
1190
1171
1191
/* Accept this device */
1172
1192
if(debug){
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1174
1195
}
1175
1196
return true;
1176
1197
}
1188
1209
struct ifreq ifr;
1189
1210
if(not get_flags(if_entry->d_name, &ifr)){
1190
1211
if(debug){
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%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);
1193
1215
}
1194
1216
return 0;
1195
1217
}
1213
1235
struct ifreq ifr;
1214
1236
if(not get_flags(if_entry->d_name, &ifr)){
1215
1237
if(debug){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%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);
1218
1241
}
1219
1242
return 0;
1220
1243
}
1222
1245
/* Reject down interfaces */
1223
1246
if(not (ifr.ifr_flags & IFF_UP)){
1224
1247
if(debug){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1248
fprintf(stderr, "Mandos plugin mandos-client: "
1249
"Rejecting down interface \"%s\"\n",
1250
if_entry->d_name);
1227
1251
}
1228
1252
return 0;
1229
1253
}
1231
1255
/* Reject non-running interfaces */
1232
1256
if(not (ifr.ifr_flags & IFF_RUNNING)){
1233
1257
if(debug){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1258
fprintf(stderr, "Mandos plugin mandos-client: "
1259
"Rejecting non-running interface \"%s\"\n",
1260
if_entry->d_name);
1236
1261
}
1237
1262
return 0;
1238
1263
}
1257
1282
/* Is this directory entry a runnable program? */
1258
1283
int runnable_hook(const struct dirent *direntry){
1259
1284
int ret;
1260
size_t sret;
1261
1285
struct stat st;
1262
1286
1263
1287
if((direntry->d_name)[0] == '\0'){
1265
1289
return 0;
1266
1290
}
1267
1291
1268
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1269
"abcdefghijklmnopqrstuvwxyz"
1270
"0123456789"
1271
"_-");
1272
if((direntry->d_name)[sret] != '\0'){
1273
/* Contains non-allowed characters */
1274
if(debug){
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1276
direntry->d_name);
1277
}
1278
return 0;
1279
}
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 */
1280
1307
1281
1308
char *fullname = NULL;
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1309
ret = asprintf(&fullname, "%s/%s", hookdir,
1310
direntry->d_name);
1283
1311
if(ret < 0){
1284
1312
perror_plus("asprintf");
1285
1313
return 0;
1288
1316
ret = stat(fullname, &st);
1289
1317
if(ret == -1){
1290
1318
if(debug){
1291
perror_plus("Could not stat hook");
1319
perror_plus("Could not stat plugin");
1292
1320
}
1293
1321
return 0;
1294
1322
}
1295
1323
if(not (S_ISREG(st.st_mode))){
1296
1324
/* Not a regular file */
1297
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1300
}
1301
1325
return 0;
1302
1326
}
1303
1327
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1304
1328
/* Not executable */
1305
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1308
}
1309
1329
return 0;
1310
1330
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1315
1331
return 1;
1316
1332
}
1317
1333
1324
1340
while(true){
1325
1341
if(mc.current_server == NULL){
1326
1342
if (debug){
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1344
"Wait until first server is found. No timeout!\n");
1329
1345
}
1330
1346
ret = avahi_simple_poll_iterate(s, -1);
1331
1347
} else {
1332
1348
if (debug){
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1351
" or wait\n");
1335
1352
}
1336
1353
/* the current time */
1337
1354
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1353
1370
- ((intmax_t)waited_time.tv_nsec / 1000000));
1354
1371
1355
1372
if (debug){
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1358
1375
}
1359
1376
1360
1377
if(block_time <= 0){
1387
1404
}
1388
1405
}
1389
1406
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
1407
int main(int argc, char *argv[]){
1527
1408
AvahiSServiceBrowser *sb = NULL;
1528
1409
int error;
1608
1489
.group = 2 },
1609
1490
{ .name = "retry", .key = 132,
1610
1491
.arg = "SECONDS",
1611
.doc = "Retry interval used when denied by the Mandos server",
1492
.doc = "Retry interval used when denied by the mandos server",
1612
1493
.group = 2 },
1613
1494
{ .name = "network-hook-dir", .key = 133,
1614
1495
.arg = "DIR",
1686
1567
argp_state_help(state, state->out_stream,
1687
1568
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1688
1569
case 'V': /* --version */
1689
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);
1690
1572
exit(argp_err_exit_status);
1691
1573
break;
1692
1574
default:
1719
1601
{
1720
1602
/* Work around Debian bug #633582:
1721
1603
<http://bugs.debian.org/633582> */
1604
struct stat st;
1722
1605
1723
1606
/* Re-raise priviliges */
1724
1607
errno = 0;
1725
1608
ret = seteuid(0);
1726
1609
if(ret == -1){
1727
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");
1728
1669
} 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
}
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);
1779
1752
}
1780
1753
}
1781
1754
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1785
}
1786
1787
1755
if(not debug){
1788
1756
avahi_set_log_function(empty_log);
1789
1757
}
1803
1771
/* Pick the first interface returned */
1804
1772
interface = strdup(direntries[0]->d_name);
1805
1773
if(debug){
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1807
1776
}
1808
1777
if(interface == NULL){
1809
1778
perror_plus("malloc");
1814
1783
free(direntries);
1815
1784
} else {
1816
1785
free(direntries);
1817
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");
1818
1788
exitcode = EXIT_FAILURE;
1819
1789
goto end;
1820
1790
}
1826
1796
srand((unsigned int) time(NULL));
1827
1797
mc.simple_poll = avahi_simple_poll_new();
1828
1798
if(mc.simple_poll == NULL){
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
1831
1801
exitcode = EX_UNAVAILABLE;
1832
1802
goto end;
1833
1803
}
1899
1869
if(strcmp(interface, "none") != 0){
1900
1870
if_index = (AvahiIfIndex) if_nametoindex(interface);
1901
1871
if(if_index == 0){
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1903
1874
exitcode = EX_UNAVAILABLE;
1904
1875
goto end;
1905
1876
}
2025
1996
#endif /* __linux__ */
2026
1997
/* Lower privileges */
2027
1998
errno = 0;
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
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
}
2032
2011
}
2033
2012
}
2034
2013
2038
2017
2039
2018
ret = init_gnutls_global(pubkey, seckey);
2040
2019
if(ret == -1){
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
2042
2022
exitcode = EX_UNAVAILABLE;
2043
2023
goto end;
2044
2024
} else {
2060
2040
}
2061
2041
2062
2042
if(not init_gpgme(pubkey, seckey, tempdir)){
2063
fprintf_plus(stderr, "init_gpgme failed\n");
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
2064
2045
exitcode = EX_UNAVAILABLE;
2065
2046
goto end;
2066
2047
} else {
2076
2057
/* (Mainly meant for debugging) */
2077
2058
char *address = strrchr(connect_to, ':');
2078
2059
if(address == NULL){
2079
fprintf_plus(stderr, "No colon in address\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
2080
2062
exitcode = EX_USAGE;
2081
2063
goto end;
2082
2064
}
2090
2072
tmpmax = strtoimax(address+1, &tmp, 10);
2091
2073
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2092
2074
or tmpmax != (uint16_t)tmpmax){
2093
fprintf_plus(stderr, "Bad port number\n");
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
2094
2077
exitcode = EX_USAGE;
2095
2078
goto end;
2096
2079
}
2126
2109
break;
2127
2110
}
2128
2111
if(debug){
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
2131
2114
}
2132
2115
sleep((int)retry_interval);
2133
2116
}
2163
2146
2164
2147
/* Check if creating the Avahi server object succeeded */
2165
2148
if(mc.server == NULL){
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
2151
avahi_strerror(error));
2168
2152
exitcode = EX_UNAVAILABLE;
2169
2153
goto end;
2170
2154
}
2178
2162
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2179
2163
NULL, 0, browse_callback, NULL);
2180
2164
if(sb == NULL){
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2182
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)));
2183
2168
exitcode = EX_UNAVAILABLE;
2184
2169
goto end;
2185
2170
}
2191
2176
/* Run the main loop */
2192
2177
2193
2178
if(debug){
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
2195
2181
}
2196
2182
2197
2183
ret = avahi_loop_with_timeout(mc.simple_poll,
2198
2184
(int)(retry_interval * 1000));
2199
2185
if(debug){
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(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");
2202
2189
}
2203
2190
2204
2191
end:
2205
2192
2206
2193
if(debug){
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
2208
2196
}
2209
2197
2210
2198
/* Cleanup things */
2226
2214
if(gpgme_initialized){
2227
2215
gpgme_release(mc.ctx);
2228
2216
}
2229
2217
2230
2218
/* Cleans up the circular linked list of Mandos servers the client
2231
2219
has seen */
2232
2220
if(mc.current_server != NULL){
2238
2226
}
2239
2227
}
2240
2228
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2229
/* XXX run network hooks "stop" here */
2243
2230
2244
/* Re-raise priviliges */
2245
{
2231
/* Take down the network interface */
2232
if(take_down_interface){
2233
/* Re-raise priviliges */
2246
2234
errno = 0;
2247
2235
ret = seteuid(0);
2248
2236
if(ret == -1){
2249
2237
perror_plus("seteuid");
2250
2238
}
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2239
if(geteuid() == 0){
2254
2240
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2255
2241
if(ret == -1){
2256
2242
perror_plus("ioctl SIOCGIFFLAGS");
2265
2251
if(ret == -1){
2266
2252
perror_plus("close");
2267
2253
}
2254
/* Lower privileges permanently */
2255
errno = 0;
2256
ret = setuid(uid);
2257
if(ret == -1){
2258
perror_plus("setuid");
2259
}
2268
2260
}
2269
2261
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2276
2262
2277
2263
/* Removes the GPGME temp directory and all files inside */
2278
2264
if(tempdir_created){
2292
2278
}
2293
2279
ret = remove(fullname);
2294
2280
if(ret == -1){
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2297
2283
}
2298
2284
free(fullname);
2299
2285
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0