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- Committer: Teddy Hogeborn
- Date: 2012-01-15 21:07:44 UTC
- Revision ID: teddy@recompile.se-20120115210744-xc33sww1zxrk92s9
Tags: version-1.5.3-1
* Makefile (version): Changed to "1.5.3".
* NEWS (Version 1.5.3): New entry.
* debian/changelog (1.5.3-1): - '' -
* NEWS (Version 1.5.3): New entry.
* debian/changelog (1.5.3-1): - '' -
- files added:
- 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
110
111
init_gnutls_session(),
111
112
GNUTLS_* */
112
113
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
115
116
116
117
/* GPGME */
117
118
#include <gpgme.h> /* All GPGME types, constants and
169
170
170
171
/* Function to use when printing errors */
171
172
void perror_plus(const char *print_text){
173
int e = errno;
172
174
fprintf(stderr, "Mandos plugin %s: ",
173
175
program_invocation_short_name);
176
errno = e;
174
177
perror(print_text);
175
178
}
176
179
180
__attribute__((format (gnu_printf, 2, 3)))
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
177
190
/*
178
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
179
192
* bytes. "buffer_capacity" is how much is currently allocated,
180
193
* "buffer_length" is how much is already used.
181
194
*/
182
195
size_t incbuffer(char **buffer, size_t buffer_length,
183
size_t buffer_capacity){
196
size_t buffer_capacity){
184
197
if(buffer_length + BUFFER_SIZE > buffer_capacity){
185
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
186
199
if(buffer == NULL){
192
205
}
193
206
194
207
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port,
196
AvahiIfIndex if_index,
197
int af){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
198
210
int ret;
199
211
server *new_server = malloc(sizeof(server));
200
212
if(new_server == NULL){
201
213
perror_plus("malloc");
202
return -1;
214
return false;
203
215
}
204
216
*new_server = (server){ .ip = strdup(ip),
205
.port = port,
206
.if_index = if_index,
207
.af = af };
217
.port = port,
218
.if_index = if_index,
219
.af = af };
208
220
if(new_server->ip == NULL){
209
221
perror_plus("strdup");
210
return -1;
222
return false;
211
223
}
212
224
/* Special case of first server */
213
225
if (mc.current_server == NULL){
224
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
225
237
if(ret == -1){
226
238
perror_plus("clock_gettime");
227
return -1;
239
return false;
228
240
}
229
return 0;
241
return true;
230
242
}
231
243
232
244
/*
233
245
* Initialize GPGME.
234
246
*/
235
static bool init_gpgme(const char *seckey,
236
const char *pubkey, const char *tempdir){
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
237
249
gpgme_error_t rc;
238
250
gpgme_engine_info_t engine_info;
239
251
254
266
255
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
256
268
if(rc != GPG_ERR_NO_ERROR){
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
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
260
271
return false;
261
272
}
262
273
263
274
rc = gpgme_op_import(mc.ctx, pgp_data);
264
275
if(rc != GPG_ERR_NO_ERROR){
265
fprintf(stderr, "Mandos plugin mandos-client: "
266
"bad gpgme_op_import: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
268
278
return false;
269
279
}
270
280
277
287
}
278
288
279
289
if(debug){
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
282
291
}
283
292
284
293
/* Init GPGME */
285
294
gpgme_check_version(NULL);
286
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
287
296
if(rc != GPG_ERR_NO_ERROR){
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
291
299
return false;
292
300
}
293
301
294
302
/* Set GPGME home directory for the OpenPGP engine only */
295
303
rc = gpgme_get_engine_info(&engine_info);
296
304
if(rc != GPG_ERR_NO_ERROR){
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
300
307
return false;
301
308
}
302
309
while(engine_info != NULL){
308
315
engine_info = engine_info->next;
309
316
}
310
317
if(engine_info == NULL){
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
313
320
return false;
314
321
}
315
322
316
323
/* Create new GPGME "context" */
317
324
rc = gpgme_new(&(mc.ctx));
318
325
if(rc != GPG_ERR_NO_ERROR){
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
322
329
return false;
323
330
}
324
331
343
350
ssize_t plaintext_length = 0;
344
351
345
352
if(debug){
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
348
354
}
349
355
350
356
/* Create new GPGME data buffer from memory cryptotext */
351
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
352
358
0);
353
359
if(rc != GPG_ERR_NO_ERROR){
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
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
357
362
return -1;
358
363
}
359
364
360
365
/* Create new empty GPGME data buffer for the plaintext */
361
366
rc = gpgme_data_new(&dh_plain);
362
367
if(rc != GPG_ERR_NO_ERROR){
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
365
gpgme_strsource(rc), gpgme_strerror(rc));
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
366
371
gpgme_data_release(dh_crypto);
367
372
return -1;
368
373
}
371
376
data buffer */
372
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
373
378
if(rc != GPG_ERR_NO_ERROR){
374
fprintf(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
377
381
plaintext_length = -1;
378
382
if(debug){
379
383
gpgme_decrypt_result_t result;
380
384
result = gpgme_op_decrypt_result(mc.ctx);
381
385
if(result == NULL){
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
384
387
} else {
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);
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);
391
392
if(result->file_name != NULL){
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "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(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");
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");
407
405
recipient = recipient->next;
408
406
}
409
407
}
412
410
}
413
411
414
412
if(debug){
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
417
414
}
418
415
419
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
426
423
*plaintext = NULL;
427
424
while(true){
428
425
plaintext_capacity = incbuffer(plaintext,
429
(size_t)plaintext_length,
430
plaintext_capacity);
426
(size_t)plaintext_length,
427
plaintext_capacity);
431
428
if(plaintext_capacity == 0){
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
429
perror_plus("incbuffer");
430
plaintext_length = -1;
431
goto decrypt_end;
435
432
}
436
433
437
434
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
450
447
}
451
448
452
449
if(debug){
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
455
451
for(ssize_t i = 0; i < plaintext_length; i++){
456
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
457
453
}
479
475
/* GnuTLS log function callback */
480
476
static void debuggnutls(__attribute__((unused)) int level,
481
477
const char* string){
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
478
fprintf_plus(stderr, "GnuTLS: %s", string);
483
479
}
484
480
485
481
static int init_gnutls_global(const char *pubkeyfilename,
487
483
int ret;
488
484
489
485
if(debug){
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
492
487
}
493
488
494
489
ret = gnutls_global_init();
495
490
if(ret != GNUTLS_E_SUCCESS){
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
498
493
return -1;
499
494
}
500
495
509
504
/* OpenPGP credentials */
510
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
511
506
if(ret != GNUTLS_E_SUCCESS){
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
514
509
gnutls_global_deinit();
515
510
return -1;
516
511
}
517
512
518
513
if(debug){
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);
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
523
518
}
524
519
525
520
ret = gnutls_certificate_set_openpgp_key_file
526
521
(mc.cred, pubkeyfilename, seckeyfilename,
527
522
GNUTLS_OPENPGP_FMT_BASE64);
528
523
if(ret != GNUTLS_E_SUCCESS){
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));
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));
535
529
goto globalfail;
536
530
}
537
531
538
532
/* GnuTLS server initialization */
539
533
ret = gnutls_dh_params_init(&mc.dh_params);
540
534
if(ret != GNUTLS_E_SUCCESS){
541
fprintf(stderr, "Mandos plugin mandos-client: "
542
"Error in GnuTLS DH parameter initialization:"
543
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
544
538
goto globalfail;
545
539
}
546
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
547
541
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
550
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
551
544
goto globalfail;
552
545
}
553
546
573
566
}
574
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
575
568
if(ret != GNUTLS_E_SUCCESS){
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
578
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
579
572
}
580
573
581
574
{
588
581
}
589
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
590
583
if(ret != GNUTLS_E_SUCCESS){
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));
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
595
587
gnutls_deinit(*session);
596
588
return -1;
597
589
}
606
598
}
607
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
608
600
if(ret != GNUTLS_E_SUCCESS){
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
611
safer_gnutls_strerror(ret));
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
612
603
gnutls_deinit(*session);
613
604
return -1;
614
605
}
659
650
pf = PF_INET;
660
651
break;
661
652
default:
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
664
654
errno = EINVAL;
665
655
return -1;
666
656
}
671
661
}
672
662
673
663
if(debug){
674
fprintf(stderr, "Mandos plugin mandos-client: "
675
"Setting up a TCP connection to %s, port %" PRIu16
676
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
677
666
}
678
667
679
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
705
694
}
706
695
if(ret == 0){
707
696
int e = errno;
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
710
698
errno = e;
711
699
goto mandos_end;
712
700
}
717
705
718
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
719
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
720
-Wunreachable-code*/
708
-Wunreachable-code*/
721
709
if(if_index == AVAHI_IF_UNSPEC){
722
fprintf(stderr, "Mandos plugin mandos-client: "
723
"An IPv6 link-local address is incomplete"
724
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
725
712
errno = EINVAL;
726
713
goto mandos_end;
727
714
}
745
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
746
733
perror_plus("if_indextoname");
747
734
} else {
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
750
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
751
737
}
752
738
} else {
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
755
741
}
756
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
757
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
767
753
perror_plus("inet_ntop");
768
754
} else {
769
755
if(strcmp(addrstr, ip) != 0){
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
772
757
}
773
758
}
774
759
}
802
787
while(true){
803
788
size_t out_size = strlen(out);
804
789
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
805
out_size - written));
790
out_size - written));
806
791
if(ret == -1){
807
792
int e = errno;
808
793
perror_plus("write");
828
813
}
829
814
830
815
if(debug){
831
fprintf(stderr, "Mandos plugin mandos-client: "
832
"Establishing TLS session with %s\n", ip);
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
833
817
}
834
818
835
819
if(quit_now){
855
839
856
840
if(ret != GNUTLS_E_SUCCESS){
857
841
if(debug){
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
860
843
gnutls_perror(ret);
861
844
}
862
845
errno = EPROTO;
866
849
/* Read OpenPGP packet that contains the wanted password */
867
850
868
851
if(debug){
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
871
854
}
872
855
873
856
while(true){
878
861
}
879
862
880
863
buffer_capacity = incbuffer(&buffer, buffer_length,
881
buffer_capacity);
864
buffer_capacity);
882
865
if(buffer_capacity == 0){
883
866
int e = errno;
884
867
perror_plus("incbuffer");
911
894
}
912
895
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
913
896
if(ret < 0){
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
916
899
gnutls_perror(ret);
917
900
errno = EPROTO;
918
901
goto mandos_end;
919
902
}
920
903
break;
921
904
default:
922
fprintf(stderr, "Mandos plugin mandos-client: "
923
"Unknown error while reading data from"
924
" encrypted session with Mandos server\n");
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
925
907
gnutls_bye(session, GNUTLS_SHUT_RDWR);
926
908
errno = EIO;
927
909
goto mandos_end;
932
914
}
933
915
934
916
if(debug){
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
917
fprintf_plus(stderr, "Closing TLS session\n");
937
918
}
938
919
939
920
if(quit_now){
951
932
952
933
if(buffer_length > 0){
953
934
ssize_t decrypted_buffer_size;
954
decrypted_buffer_size = pgp_packet_decrypt(buffer,
955
buffer_length,
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
956
936
&decrypted_buffer);
957
937
if(decrypted_buffer_size >= 0){
958
938
969
949
if(ret == 0 and ferror(stdout)){
970
950
int e = errno;
971
951
if(debug){
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
974
strerror(errno));
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
975
954
}
976
955
errno = e;
977
956
goto mandos_end;
1034
1013
switch(event){
1035
1014
default:
1036
1015
case AVAHI_RESOLVER_FAILURE:
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)));
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)));
1041
1020
break;
1042
1021
1043
1022
case AVAHI_RESOLVER_FOUND:
1045
1024
char ip[AVAHI_ADDRESS_STR_MAX];
1046
1025
avahi_address_snprint(ip, sizeof(ip), address);
1047
1026
if(debug){
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);
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);
1052
1030
}
1053
1031
int ret = start_mandos_communication(ip, port, interface,
1054
1032
avahi_proto_to_af(proto));
1055
1033
if(ret == 0){
1056
1034
avahi_simple_poll_quit(mc.simple_poll);
1057
1035
} else {
1058
ret = add_server(ip, port, interface,
1059
avahi_proto_to_af(proto));
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
}
1060
1041
}
1061
1042
}
1062
1043
}
1086
1067
default:
1087
1068
case AVAHI_BROWSER_FAILURE:
1088
1069
1089
fprintf(stderr, "Mandos plugin mandos-client: "
1090
"(Avahi browser) %s\n",
1091
avahi_strerror(avahi_server_errno(mc.server)));
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
avahi_strerror(avahi_server_errno(mc.server)));
1092
1072
avahi_simple_poll_quit(mc.simple_poll);
1093
1073
return;
1094
1074
1101
1081
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1102
1082
name, type, domain, protocol, 0,
1103
1083
resolve_callback, NULL) == NULL)
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)));
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1085
" %s\n", name,
1086
avahi_strerror(avahi_server_errno(mc.server)));
1107
1087
break;
1108
1088
1109
1089
case AVAHI_BROWSER_REMOVE:
1112
1092
case AVAHI_BROWSER_ALL_FOR_NOW:
1113
1093
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1114
1094
if(debug){
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1117
1097
}
1118
1098
break;
1119
1099
}
1158
1138
/* Reject the loopback device */
1159
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1160
1140
if(debug){
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1163
1143
}
1164
1144
return false;
1165
1145
}
1166
1146
/* Accept point-to-point devices only if connect_to is specified */
1167
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1168
1148
if(debug){
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1171
1151
}
1172
1152
return true;
1173
1153
}
1174
1154
/* Otherwise, reject non-broadcast-capable devices */
1175
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1176
1156
if(debug){
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1179
1159
}
1180
1160
return false;
1181
1161
}
1182
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1183
1163
if(ifr->ifr_flags & IFF_NOARP){
1184
1164
if(debug){
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1187
1167
}
1188
1168
return false;
1189
1169
}
1190
1170
1191
1171
/* Accept this device */
1192
1172
if(debug){
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1195
1174
}
1196
1175
return true;
1197
1176
}
1209
1188
struct ifreq ifr;
1210
1189
if(not get_flags(if_entry->d_name, &ifr)){
1211
1190
if(debug){
1212
fprintf(stderr, "Mandos plugin mandos-client: "
1213
"Failed to get flags for interface \"%s\"\n",
1214
if_entry->d_name);
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1215
1193
}
1216
1194
return 0;
1217
1195
}
1235
1213
struct ifreq ifr;
1236
1214
if(not get_flags(if_entry->d_name, &ifr)){
1237
1215
if(debug){
1238
fprintf(stderr, "Mandos plugin mandos-client: "
1239
"Failed to get flags for interface \"%s\"\n",
1240
if_entry->d_name);
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1241
1218
}
1242
1219
return 0;
1243
1220
}
1245
1222
/* Reject down interfaces */
1246
1223
if(not (ifr.ifr_flags & IFF_UP)){
1247
1224
if(debug){
1248
fprintf(stderr, "Mandos plugin mandos-client: "
1249
"Rejecting down interface \"%s\"\n",
1250
if_entry->d_name);
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1251
1227
}
1252
1228
return 0;
1253
1229
}
1255
1231
/* Reject non-running interfaces */
1256
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1257
1233
if(debug){
1258
fprintf(stderr, "Mandos plugin mandos-client: "
1259
"Rejecting non-running interface \"%s\"\n",
1260
if_entry->d_name);
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1261
1236
}
1262
1237
return 0;
1263
1238
}
1282
1257
/* Is this directory entry a runnable program? */
1283
1258
int runnable_hook(const struct dirent *direntry){
1284
1259
int ret;
1260
size_t sret;
1285
1261
struct stat st;
1286
1262
1287
1263
if((direntry->d_name)[0] == '\0'){
1289
1265
return 0;
1290
1266
}
1291
1267
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 */
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
}
1307
1280
1308
1281
char *fullname = NULL;
1309
ret = asprintf(&fullname, "%s/%s", hookdir,
1310
direntry->d_name);
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1311
1283
if(ret < 0){
1312
1284
perror_plus("asprintf");
1313
1285
return 0;
1316
1288
ret = stat(fullname, &st);
1317
1289
if(ret == -1){
1318
1290
if(debug){
1319
perror_plus("Could not stat plugin");
1291
perror_plus("Could not stat hook");
1320
1292
}
1321
1293
return 0;
1322
1294
}
1323
1295
if(not (S_ISREG(st.st_mode))){
1324
1296
/* Not a regular file */
1297
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1300
}
1325
1301
return 0;
1326
1302
}
1327
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1328
1304
/* Not executable */
1305
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1308
}
1329
1309
return 0;
1330
1310
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1331
1315
return 1;
1332
1316
}
1333
1317
1340
1324
while(true){
1341
1325
if(mc.current_server == NULL){
1342
1326
if (debug){
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1344
"Wait until first server is found. No timeout!\n");
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1345
1329
}
1346
1330
ret = avahi_simple_poll_iterate(s, -1);
1347
1331
} else {
1348
1332
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1351
" or wait\n");
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1352
1335
}
1353
1336
/* the current time */
1354
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1370
1353
- ((intmax_t)waited_time.tv_nsec / 1000000));
1371
1354
1372
1355
if (debug){
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1375
1358
}
1376
1359
1377
1360
if(block_time <= 0){
1404
1387
}
1405
1388
}
1406
1389
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
1407
1526
int main(int argc, char *argv[]){
1408
1527
AvahiSServiceBrowser *sb = NULL;
1409
1528
int error;
1489
1608
.group = 2 },
1490
1609
{ .name = "retry", .key = 132,
1491
1610
.arg = "SECONDS",
1492
.doc = "Retry interval used when denied by the mandos server",
1611
.doc = "Retry interval used when denied by the Mandos server",
1493
1612
.group = 2 },
1494
1613
{ .name = "network-hook-dir", .key = 133,
1495
1614
.arg = "DIR",
1567
1686
argp_state_help(state, state->out_stream,
1568
1687
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1569
1688
case 'V': /* --version */
1570
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1571
fprintf(state->out_stream, "%s\n", argp_program_version);
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1572
1690
exit(argp_err_exit_status);
1573
1691
break;
1574
1692
default:
1601
1719
{
1602
1720
/* Work around Debian bug #633582:
1603
1721
<http://bugs.debian.org/633582> */
1604
struct stat st;
1605
1722
1606
1723
/* Re-raise priviliges */
1607
1724
errno = 0;
1608
1725
ret = seteuid(0);
1609
1726
if(ret == -1){
1610
1727
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");
1669
1728
} else {
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);
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
}
1752
1779
}
1753
1780
}
1754
1781
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1785
}
1786
1755
1787
if(not debug){
1756
1788
avahi_set_log_function(empty_log);
1757
1789
}
1771
1803
/* Pick the first interface returned */
1772
1804
interface = strdup(direntries[0]->d_name);
1773
1805
if(debug){
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1776
1807
}
1777
1808
if(interface == NULL){
1778
1809
perror_plus("malloc");
1783
1814
free(direntries);
1784
1815
} else {
1785
1816
free(direntries);
1786
fprintf(stderr, "Mandos plugin mandos-client: "
1787
"Could not find a network interface\n");
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1788
1818
exitcode = EXIT_FAILURE;
1789
1819
goto end;
1790
1820
}
1796
1826
srand((unsigned int) time(NULL));
1797
1827
mc.simple_poll = avahi_simple_poll_new();
1798
1828
if(mc.simple_poll == NULL){
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1801
1831
exitcode = EX_UNAVAILABLE;
1802
1832
goto end;
1803
1833
}
1869
1899
if(strcmp(interface, "none") != 0){
1870
1900
if_index = (AvahiIfIndex) if_nametoindex(interface);
1871
1901
if(if_index == 0){
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1874
1903
exitcode = EX_UNAVAILABLE;
1875
1904
goto end;
1876
1905
}
1996
2025
#endif /* __linux__ */
1997
2026
/* Lower privileges */
1998
2027
errno = 0;
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
}
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
2011
2032
}
2012
2033
}
2013
2034
2017
2038
2018
2039
ret = init_gnutls_global(pubkey, seckey);
2019
2040
if(ret == -1){
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
2022
2042
exitcode = EX_UNAVAILABLE;
2023
2043
goto end;
2024
2044
} else {
2040
2060
}
2041
2061
2042
2062
if(not init_gpgme(pubkey, seckey, tempdir)){
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
2063
fprintf_plus(stderr, "init_gpgme failed\n");
2045
2064
exitcode = EX_UNAVAILABLE;
2046
2065
goto end;
2047
2066
} else {
2057
2076
/* (Mainly meant for debugging) */
2058
2077
char *address = strrchr(connect_to, ':');
2059
2078
if(address == NULL){
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
2079
fprintf_plus(stderr, "No colon in address\n");
2062
2080
exitcode = EX_USAGE;
2063
2081
goto end;
2064
2082
}
2072
2090
tmpmax = strtoimax(address+1, &tmp, 10);
2073
2091
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2074
2092
or tmpmax != (uint16_t)tmpmax){
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
2093
fprintf_plus(stderr, "Bad port number\n");
2077
2094
exitcode = EX_USAGE;
2078
2095
goto end;
2079
2096
}
2109
2126
break;
2110
2127
}
2111
2128
if(debug){
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2114
2131
}
2115
2132
sleep((int)retry_interval);
2116
2133
}
2146
2163
2147
2164
/* Check if creating the Avahi server object succeeded */
2148
2165
if(mc.server == NULL){
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
2151
avahi_strerror(error));
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
2152
2168
exitcode = EX_UNAVAILABLE;
2153
2169
goto end;
2154
2170
}
2162
2178
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2163
2179
NULL, 0, browse_callback, NULL);
2164
2180
if(sb == NULL){
2165
fprintf(stderr, "Mandos plugin mandos-client: "
2166
"Failed to create service browser: %s\n",
2167
avahi_strerror(avahi_server_errno(mc.server)));
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2182
avahi_strerror(avahi_server_errno(mc.server)));
2168
2183
exitcode = EX_UNAVAILABLE;
2169
2184
goto end;
2170
2185
}
2176
2191
/* Run the main loop */
2177
2192
2178
2193
if(debug){
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2181
2195
}
2182
2196
2183
2197
ret = avahi_loop_with_timeout(mc.simple_poll,
2184
2198
(int)(retry_interval * 1000));
2185
2199
if(debug){
2186
fprintf(stderr, "Mandos plugin mandos-client: "
2187
"avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(ret == 0) ? "successfully" : "with error");
2189
2202
}
2190
2203
2191
2204
end:
2192
2205
2193
2206
if(debug){
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2196
2208
}
2197
2209
2198
2210
/* Cleanup things */
2214
2226
if(gpgme_initialized){
2215
2227
gpgme_release(mc.ctx);
2216
2228
}
2217
2229
2218
2230
/* Cleans up the circular linked list of Mandos servers the client
2219
2231
has seen */
2220
2232
if(mc.current_server != NULL){
2226
2238
}
2227
2239
}
2228
2240
2229
/* XXX run network hooks "stop" here */
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2230
2243
2231
/* Take down the network interface */
2232
if(take_down_interface){
2233
/* Re-raise priviliges */
2244
/* Re-raise priviliges */
2245
{
2234
2246
errno = 0;
2235
2247
ret = seteuid(0);
2236
2248
if(ret == -1){
2237
2249
perror_plus("seteuid");
2238
2250
}
2239
if(geteuid() == 0){
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2240
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2241
2255
if(ret == -1){
2242
2256
perror_plus("ioctl SIOCGIFFLAGS");
2251
2265
if(ret == -1){
2252
2266
perror_plus("close");
2253
2267
}
2254
/* Lower privileges permanently */
2255
errno = 0;
2256
ret = setuid(uid);
2257
if(ret == -1){
2258
perror_plus("setuid");
2259
}
2260
2268
}
2261
2269
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2262
2276
2263
2277
/* Removes the GPGME temp directory and all files inside */
2264
2278
if(tempdir_created){
2278
2292
}
2279
2293
ret = remove(fullname);
2280
2294
if(ret == -1){
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
2283
2297
}
2284
2298
free(fullname);
2285
2299
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0