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- Committer: teddy at bsnet
- Date: 2011-11-12 16:24:19 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-20111112162419-pe83skogsctxuzw7
* plugins.d/mandos-client.c: Prefix all printouts with "Mandos plugin
mandos-client: ".
* plugins.d/mandos-client.c (main): Wait for network hooks and check
the completion status.
mandos-client: ".
* plugins.d/mandos-client.c (main): Wait for network hooks and check
the completion status.
- files removed:
- network-hooks.d
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
90
92
91
#ifdef __linux__
93
92
#include <sys/klog.h> /* klogctl() */
111
110
init_gnutls_session(),
112
111
GNUTLS_* */
113
112
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
116
115
117
116
/* GPGME */
118
117
#include <gpgme.h> /* All GPGME types, constants and
134
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
135
134
static const char sys_class_net[] = "/sys/class/net";
136
135
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
136
139
137
/* Doubly linked list that need to be circularly linked when used */
140
138
typedef struct server{
175
173
perror(print_text);
176
174
}
177
175
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
187
176
/*
188
177
* Make additional room in "buffer" for at least BUFFER_SIZE more
189
178
* bytes. "buffer_capacity" is how much is currently allocated,
190
179
* "buffer_length" is how much is already used.
191
180
*/
192
181
size_t incbuffer(char **buffer, size_t buffer_length,
193
size_t buffer_capacity){
182
size_t buffer_capacity){
194
183
if(buffer_length + BUFFER_SIZE > buffer_capacity){
195
184
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
196
185
if(buffer == NULL){
202
191
}
203
192
204
193
/* Add server to set of servers to retry periodically */
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
194
int add_server(const char *ip, uint16_t port,
195
AvahiIfIndex if_index,
196
int af){
207
197
int ret;
208
198
server *new_server = malloc(sizeof(server));
209
199
if(new_server == NULL){
211
201
return -1;
212
202
}
213
203
*new_server = (server){ .ip = strdup(ip),
214
.port = port,
215
.if_index = if_index,
216
.af = af };
204
.port = port,
205
.if_index = if_index,
206
.af = af };
217
207
if(new_server->ip == NULL){
218
208
perror_plus("strdup");
219
209
return -1;
241
231
/*
242
232
* Initialize GPGME.
243
233
*/
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
234
static bool init_gpgme(const char *seckey,
235
const char *pubkey, const char *tempdir){
246
236
gpgme_error_t rc;
247
237
gpgme_engine_info_t engine_info;
248
238
263
253
264
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
265
255
if(rc != GPG_ERR_NO_ERROR){
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
268
259
return false;
269
260
}
270
261
271
262
rc = gpgme_op_import(mc.ctx, pgp_data);
272
263
if(rc != GPG_ERR_NO_ERROR){
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
275
267
return false;
276
268
}
277
269
284
276
}
285
277
286
278
if(debug){
287
fprintf_plus(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
288
281
}
289
282
290
283
/* Init GPGME */
291
284
gpgme_check_version(NULL);
292
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
293
286
if(rc != GPG_ERR_NO_ERROR){
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
296
290
return false;
297
291
}
298
292
299
293
/* Set GPGME home directory for the OpenPGP engine only */
300
294
rc = gpgme_get_engine_info(&engine_info);
301
295
if(rc != GPG_ERR_NO_ERROR){
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
304
299
return false;
305
300
}
306
301
while(engine_info != NULL){
312
307
engine_info = engine_info->next;
313
308
}
314
309
if(engine_info == NULL){
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
317
312
return false;
318
313
}
319
314
320
315
/* Create new GPGME "context" */
321
316
rc = gpgme_new(&(mc.ctx));
322
317
if(rc != GPG_ERR_NO_ERROR){
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
326
321
return false;
327
322
}
328
323
347
342
ssize_t plaintext_length = 0;
348
343
349
344
if(debug){
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
351
347
}
352
348
353
349
/* Create new GPGME data buffer from memory cryptotext */
354
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
355
351
0);
356
352
if(rc != GPG_ERR_NO_ERROR){
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
359
356
return -1;
360
357
}
361
358
362
359
/* Create new empty GPGME data buffer for the plaintext */
363
360
rc = gpgme_data_new(&dh_plain);
364
361
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
368
365
gpgme_data_release(dh_crypto);
369
366
return -1;
370
367
}
373
370
data buffer */
374
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
375
372
if(rc != GPG_ERR_NO_ERROR){
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
378
376
plaintext_length = -1;
379
377
if(debug){
380
378
gpgme_decrypt_result_t result;
381
379
result = gpgme_op_decrypt_result(mc.ctx);
382
380
if(result == NULL){
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
384
383
} else {
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
389
390
if(result->file_name != NULL){
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
391
393
}
392
394
gpgme_recipient_t recipient;
393
395
recipient = result->recipients;
394
396
while(recipient != NULL){
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
402
406
recipient = recipient->next;
403
407
}
404
408
}
407
411
}
408
412
409
413
if(debug){
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
411
416
}
412
417
413
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
420
425
*plaintext = NULL;
421
426
while(true){
422
427
plaintext_capacity = incbuffer(plaintext,
423
(size_t)plaintext_length,
424
plaintext_capacity);
428
(size_t)plaintext_length,
429
plaintext_capacity);
425
430
if(plaintext_capacity == 0){
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
429
434
}
430
435
431
436
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
444
449
}
445
450
446
451
if(debug){
447
fprintf_plus(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
448
454
for(ssize_t i = 0; i < plaintext_length; i++){
449
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
450
456
}
472
478
/* GnuTLS log function callback */
473
479
static void debuggnutls(__attribute__((unused)) int level,
474
480
const char* string){
475
fprintf_plus(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
476
482
}
477
483
478
484
static int init_gnutls_global(const char *pubkeyfilename,
480
486
int ret;
481
487
482
488
if(debug){
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
484
491
}
485
492
486
493
ret = gnutls_global_init();
487
494
if(ret != GNUTLS_E_SUCCESS){
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
490
497
return -1;
491
498
}
492
499
501
508
/* OpenPGP credentials */
502
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
503
510
if(ret != GNUTLS_E_SUCCESS){
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
506
513
gnutls_global_deinit();
507
514
return -1;
508
515
}
509
516
510
517
if(debug){
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
515
522
}
516
523
517
524
ret = gnutls_certificate_set_openpgp_key_file
518
525
(mc.cred, pubkeyfilename, seckeyfilename,
519
526
GNUTLS_OPENPGP_FMT_BASE64);
520
527
if(ret != GNUTLS_E_SUCCESS){
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
526
534
goto globalfail;
527
535
}
528
536
529
537
/* GnuTLS server initialization */
530
538
ret = gnutls_dh_params_init(&mc.dh_params);
531
539
if(ret != GNUTLS_E_SUCCESS){
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
535
543
goto globalfail;
536
544
}
537
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
538
546
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
541
550
goto globalfail;
542
551
}
543
552
563
572
}
564
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
565
574
if(ret != GNUTLS_E_SUCCESS){
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
569
578
}
570
579
571
580
{
578
587
}
579
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
580
589
if(ret != GNUTLS_E_SUCCESS){
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
584
594
gnutls_deinit(*session);
585
595
return -1;
586
596
}
595
605
}
596
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
597
607
if(ret != GNUTLS_E_SUCCESS){
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
600
611
gnutls_deinit(*session);
601
612
return -1;
602
613
}
647
658
pf = PF_INET;
648
659
break;
649
660
default:
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
651
663
errno = EINVAL;
652
664
return -1;
653
665
}
658
670
}
659
671
660
672
if(debug){
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
663
676
}
664
677
665
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
691
704
}
692
705
if(ret == 0){
693
706
int e = errno;
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
695
709
errno = e;
696
710
goto mandos_end;
697
711
}
702
716
703
717
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
704
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
705
-Wunreachable-code*/
719
-Wunreachable-code*/
706
720
if(if_index == AVAHI_IF_UNSPEC){
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
709
724
errno = EINVAL;
710
725
goto mandos_end;
711
726
}
729
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
730
745
perror_plus("if_indextoname");
731
746
} else {
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
734
750
}
735
751
} else {
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
738
754
}
739
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
740
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
750
766
perror_plus("inet_ntop");
751
767
} else {
752
768
if(strcmp(addrstr, ip) != 0){
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
754
771
}
755
772
}
756
773
}
784
801
while(true){
785
802
size_t out_size = strlen(out);
786
803
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
787
out_size - written));
804
out_size - written));
788
805
if(ret == -1){
789
806
int e = errno;
790
807
perror_plus("write");
810
827
}
811
828
812
829
if(debug){
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
814
832
}
815
833
816
834
if(quit_now){
836
854
837
855
if(ret != GNUTLS_E_SUCCESS){
838
856
if(debug){
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
840
859
gnutls_perror(ret);
841
860
}
842
861
errno = EPROTO;
846
865
/* Read OpenPGP packet that contains the wanted password */
847
866
848
867
if(debug){
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
851
870
}
852
871
853
872
while(true){
858
877
}
859
878
860
879
buffer_capacity = incbuffer(&buffer, buffer_length,
861
buffer_capacity);
880
buffer_capacity);
862
881
if(buffer_capacity == 0){
863
882
int e = errno;
864
883
perror_plus("incbuffer");
891
910
}
892
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
893
912
if(ret < 0){
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
896
915
gnutls_perror(ret);
897
916
errno = EPROTO;
898
917
goto mandos_end;
899
918
}
900
919
break;
901
920
default:
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
904
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
905
925
errno = EIO;
906
926
goto mandos_end;
911
931
}
912
932
913
933
if(debug){
914
fprintf_plus(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
915
936
}
916
937
917
938
if(quit_now){
929
950
930
951
if(buffer_length > 0){
931
952
ssize_t decrypted_buffer_size;
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
953
decrypted_buffer_size = pgp_packet_decrypt(buffer,
954
buffer_length,
933
955
&decrypted_buffer);
934
956
if(decrypted_buffer_size >= 0){
935
957
946
968
if(ret == 0 and ferror(stdout)){
947
969
int e = errno;
948
970
if(debug){
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
971
fprintf(stderr, "Mandos plugin mandos-client: "
972
"Error writing encrypted data: %s\n",
973
strerror(errno));
951
974
}
952
975
errno = e;
953
976
goto mandos_end;
1010
1033
switch(event){
1011
1034
default:
1012
1035
case AVAHI_RESOLVER_FAILURE:
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
1036
fprintf(stderr, "Mandos plugin mandos-client: "
1037
"(Avahi Resolver) Failed to resolve service '%s'"
1038
" of type '%s' in domain '%s': %s\n", name, type, domain,
1039
avahi_strerror(avahi_server_errno(mc.server)));
1017
1040
break;
1018
1041
1019
1042
case AVAHI_RESOLVER_FOUND:
1021
1044
char ip[AVAHI_ADDRESS_STR_MAX];
1022
1045
avahi_address_snprint(ip, sizeof(ip), address);
1023
1046
if(debug){
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
1047
fprintf(stderr, "Mandos plugin mandos-client: "
1048
"Mandos server \"%s\" found on %s (%s, %"
1049
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1050
ip, (intmax_t)interface, port);
1027
1051
}
1028
1052
int ret = start_mandos_communication(ip, port, interface,
1029
1053
avahi_proto_to_af(proto));
1061
1085
default:
1062
1086
case AVAHI_BROWSER_FAILURE:
1063
1087
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1088
fprintf(stderr, "Mandos plugin mandos-client: "
1089
"(Avahi browser) %s\n",
1090
avahi_strerror(avahi_server_errno(mc.server)));
1066
1091
avahi_simple_poll_quit(mc.simple_poll);
1067
1092
return;
1068
1093
1075
1100
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1076
1101
name, type, domain, protocol, 0,
1077
1102
resolve_callback, NULL) == NULL)
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
1103
fprintf(stderr, "Mandos plugin mandos-client: "
1104
"Avahi: Failed to resolve service '%s': %s\n",
1105
name, avahi_strerror(avahi_server_errno(mc.server)));
1081
1106
break;
1082
1107
1083
1108
case AVAHI_BROWSER_REMOVE:
1086
1111
case AVAHI_BROWSER_ALL_FOR_NOW:
1087
1112
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1088
1113
if(debug){
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1114
fprintf(stderr, "Mandos plugin mandos-client: "
1115
"No Mandos server found, still searching...\n");
1091
1116
}
1092
1117
break;
1093
1118
}
1132
1157
/* Reject the loopback device */
1133
1158
if(ifr->ifr_flags & IFF_LOOPBACK){
1134
1159
if(debug){
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1160
fprintf(stderr, "Mandos plugin mandos-client: "
1161
"Rejecting loopback interface \"%s\"\n", ifname);
1137
1162
}
1138
1163
return false;
1139
1164
}
1140
1165
/* Accept point-to-point devices only if connect_to is specified */
1141
1166
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1142
1167
if(debug){
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1168
fprintf(stderr, "Mandos plugin mandos-client: "
1169
"Accepting point-to-point interface \"%s\"\n", ifname);
1145
1170
}
1146
1171
return true;
1147
1172
}
1148
1173
/* Otherwise, reject non-broadcast-capable devices */
1149
1174
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1150
1175
if(debug){
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1176
fprintf(stderr, "Mandos plugin mandos-client: "
1177
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1153
1178
}
1154
1179
return false;
1155
1180
}
1156
1181
/* Reject non-ARP interfaces (including dummy interfaces) */
1157
1182
if(ifr->ifr_flags & IFF_NOARP){
1158
1183
if(debug){
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1184
fprintf(stderr, "Mandos plugin mandos-client: "
1185
"Rejecting non-ARP interface \"%s\"\n", ifname);
1161
1186
}
1162
1187
return false;
1163
1188
}
1164
1189
1165
1190
/* Accept this device */
1166
1191
if(debug){
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1192
fprintf(stderr, "Mandos plugin mandos-client: "
1193
"Interface \"%s\" is good\n", ifname);
1168
1194
}
1169
1195
return true;
1170
1196
}
1182
1208
struct ifreq ifr;
1183
1209
if(not get_flags(if_entry->d_name, &ifr)){
1184
1210
if(debug){
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1211
fprintf(stderr, "Mandos plugin mandos-client: "
1212
"Failed to get flags for interface \"%s\"\n",
1213
if_entry->d_name);
1187
1214
}
1188
1215
return 0;
1189
1216
}
1207
1234
struct ifreq ifr;
1208
1235
if(not get_flags(if_entry->d_name, &ifr)){
1209
1236
if(debug){
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1237
fprintf(stderr, "Mandos plugin mandos-client: "
1238
"Failed to get flags for interface \"%s\"\n",
1239
if_entry->d_name);
1212
1240
}
1213
1241
return 0;
1214
1242
}
1216
1244
/* Reject down interfaces */
1217
1245
if(not (ifr.ifr_flags & IFF_UP)){
1218
1246
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1247
fprintf(stderr, "Mandos plugin mandos-client: "
1248
"Rejecting down interface \"%s\"\n",
1249
if_entry->d_name);
1221
1250
}
1222
1251
return 0;
1223
1252
}
1225
1254
/* Reject non-running interfaces */
1226
1255
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
1256
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1257
fprintf(stderr, "Mandos plugin mandos-client: "
1258
"Rejecting non-running interface \"%s\"\n",
1259
if_entry->d_name);
1230
1260
}
1231
1261
return 0;
1232
1262
}
1251
1281
/* Is this directory entry a runnable program? */
1252
1282
int runnable_hook(const struct dirent *direntry){
1253
1283
int ret;
1254
size_t sret;
1255
1284
struct stat st;
1256
1285
1257
1286
if((direntry->d_name)[0] == '\0'){
1259
1288
return 0;
1260
1289
}
1261
1290
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1264
"0123456789"
1265
"_-");
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1268
if(debug){
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1271
}
1272
return 0;
1273
}
1274
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
if(ret < 0){
1278
perror_plus("asprintf");
1279
return 0;
1280
}
1281
1282
ret = stat(fullname, &st);
1291
/* Save pointer to last character */
1292
char *end = strchr(direntry->d_name, '\0')-1;
1293
1294
if(*end == '~'){
1295
/* Backup name~ */
1296
return 0;
1297
}
1298
1299
if(((direntry->d_name)[0] == '#')
1300
and (*end == '#')){
1301
/* Temporary #name# */
1302
return 0;
1303
}
1304
1305
/* XXX more rules here */
1306
1307
ret = stat(direntry->d_name, &st);
1283
1308
if(ret == -1){
1284
1309
if(debug){
1285
perror_plus("Could not stat hook");
1310
perror_plus("Could not stat plugin");
1286
1311
}
1287
1312
return 0;
1288
1313
}
1289
1314
if(not (S_ISREG(st.st_mode))){
1290
1315
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1295
1316
return 0;
1296
1317
}
1297
1318
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1298
1319
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1303
1320
return 0;
1304
1321
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1309
1322
return 1;
1310
1323
}
1311
1324
1318
1331
while(true){
1319
1332
if(mc.current_server == NULL){
1320
1333
if (debug){
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1334
fprintf(stderr, "Mandos plugin mandos-client: "
1335
"Wait until first server is found. No timeout!\n");
1323
1336
}
1324
1337
ret = avahi_simple_poll_iterate(s, -1);
1325
1338
} else {
1326
1339
if (debug){
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1340
fprintf(stderr, "Mandos plugin mandos-client: "
1341
"Check current_server if we should run it,"
1342
" or wait\n");
1329
1343
}
1330
1344
/* the current time */
1331
1345
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1347
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1348
1362
1349
1363
if (debug){
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1364
fprintf(stderr, "Mandos plugin mandos-client: "
1365
"Blocking for %" PRIdMAX " ms\n", block_time);
1352
1366
}
1353
1367
1354
1368
if(block_time <= 0){
1381
1395
}
1382
1396
}
1383
1397
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
dup2(devnull, STDIN_FILENO);
1435
close(devnull);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1438
if(ret == -1){
1439
perror_plus("setenv");
1440
_exit(EX_OSERR);
1441
}
1442
ret = setenv("DEVICE", interface, 1);
1443
if(ret == -1){
1444
perror_plus("setenv");
1445
_exit(EX_OSERR);
1446
}
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1448
if(ret == -1){
1449
perror_plus("setenv");
1450
_exit(EX_OSERR);
1451
}
1452
ret = setenv("MODE", mode, 1);
1453
if(ret == -1){
1454
perror_plus("setenv");
1455
_exit(EX_OSERR);
1456
}
1457
char *delaystring;
1458
ret = asprintf(&delaystring, "%f", delay);
1459
if(ret == -1){
1460
perror_plus("asprintf");
1461
_exit(EX_OSERR);
1462
}
1463
ret = setenv("DELAY", delaystring, 1);
1464
if(ret == -1){
1465
free(delaystring);
1466
perror_plus("setenv");
1467
_exit(EX_OSERR);
1468
}
1469
free(delaystring);
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1472
} else {
1473
int status;
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1476
free(fullname);
1477
continue;
1478
}
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1484
free(fullname);
1485
continue;
1486
}
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1490
WTERMSIG(status));
1491
free(fullname);
1492
continue;
1493
} else {
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1496
free(fullname);
1497
continue;
1498
}
1499
}
1500
free(fullname);
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1504
}
1505
}
1506
close(devnull);
1507
}
1508
return true;
1509
}
1510
1511
1398
int main(int argc, char *argv[]){
1512
1399
AvahiSServiceBrowser *sb = NULL;
1513
1400
int error;
1595
1482
.arg = "SECONDS",
1596
1483
.doc = "Retry interval used when denied by the mandos server",
1597
1484
.group = 2 },
1598
{ .name = "network-hook-dir", .key = 133,
1599
.arg = "DIR",
1600
.doc = "Directory where network hooks are located",
1601
.group = 2 },
1602
1485
/*
1603
1486
* These reproduce what we would get without ARGP_NO_HELP
1604
1487
*/
1657
1540
argp_error(state, "Bad retry interval");
1658
1541
}
1659
1542
break;
1660
case 133: /* --network-hook-dir */
1661
hookdir = arg;
1662
break;
1663
1543
/*
1664
1544
* These reproduce what we would get without ARGP_NO_HELP
1665
1545
*/
1671
1551
argp_state_help(state, state->out_stream,
1672
1552
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1673
1553
case 'V': /* --version */
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1554
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1555
fprintf(state->out_stream, "%s\n", argp_program_version);
1677
1556
exit(argp_err_exit_status);
1678
1557
break;
1679
1558
default:
1706
1585
{
1707
1586
/* Work around Debian bug #633582:
1708
1587
<http://bugs.debian.org/633582> */
1588
struct stat st;
1709
1589
1710
1590
/* Re-raise priviliges */
1711
1591
errno = 0;
1712
1592
ret = seteuid(0);
1713
1593
if(ret == -1){
1714
1594
perror_plus("seteuid");
1595
}
1596
1597
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1598
int seckey_fd = open(seckey, O_RDONLY);
1599
if(seckey_fd == -1){
1600
perror_plus("open");
1601
} else {
1602
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1603
if(ret == -1){
1604
perror_plus("fstat");
1605
} else {
1606
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1607
ret = fchown(seckey_fd, uid, gid);
1608
if(ret == -1){
1609
perror_plus("fchown");
1610
}
1611
}
1612
}
1613
TEMP_FAILURE_RETRY(close(seckey_fd));
1614
}
1615
}
1616
1617
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1618
int pubkey_fd = open(pubkey, O_RDONLY);
1619
if(pubkey_fd == -1){
1620
perror_plus("open");
1621
} else {
1622
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1623
if(ret == -1){
1624
perror_plus("fstat");
1625
} else {
1626
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1627
ret = fchown(pubkey_fd, uid, gid);
1628
if(ret == -1){
1629
perror_plus("fchown");
1630
}
1631
}
1632
}
1633
TEMP_FAILURE_RETRY(close(pubkey_fd));
1634
}
1635
}
1636
1637
/* Lower privileges */
1638
errno = 0;
1639
ret = seteuid(uid);
1640
if(ret == -1){
1641
perror_plus("seteuid");
1642
}
1643
}
1644
1645
/* Find network hooks and run them */
1646
{
1647
struct dirent **direntries;
1648
struct dirent *direntry;
1649
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1650
alphasort);
1651
if(numhooks == -1){
1652
perror_plus("scandir");
1715
1653
} else {
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
1765
}
1654
int devnull = open("/dev/null", O_RDONLY);
1655
for(int i = 0; i < numhooks; i++){
1656
direntry = direntries[0];
1657
char *fullname = NULL;
1658
ret = asprintf(&fullname, "%s/%s", tempdir,
1659
direntry->d_name);
1660
if(ret < 0){
1661
perror_plus("asprintf");
1662
continue;
1663
}
1664
pid_t hook_pid = fork();
1665
if(hook_pid == 0){
1666
/* Child */
1667
dup2(devnull, STDIN_FILENO);
1668
close(devnull);
1669
dup2(STDERR_FILENO, STDOUT_FILENO);
1670
ret = setenv("DEVICE", interface, 1);
1671
if(ret == -1){
1672
perror_plus("setenv");
1673
exit(1);
1674
}
1675
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1676
if(ret == -1){
1677
perror_plus("setenv");
1678
exit(1);
1679
}
1680
ret = setenv("MODE", "start", 1);
1681
if(ret == -1){
1682
perror_plus("setenv");
1683
exit(1);
1684
}
1685
char *delaystring;
1686
ret = asprintf(&delaystring, "%f", delay);
1687
if(ret == -1){
1688
perror_plus("asprintf");
1689
exit(1);
1690
}
1691
ret = setenv("DELAY", delaystring, 1);
1692
if(ret == -1){
1693
free(delaystring);
1694
perror_plus("setenv");
1695
exit(1);
1696
}
1697
free(delaystring);
1698
ret = execl(fullname, direntry->d_name, "start", NULL);
1699
perror_plus("execl");
1700
} else {
1701
int status;
1702
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1703
perror_plus("waitpid");
1704
free(fullname);
1705
continue;
1706
}
1707
if(WIFEXITED(status)){
1708
if(WEXITSTATUS(status) != 0){
1709
fprintf(stderr, "Mandos plugin mandos-client: "
1710
"Warning: network hook \"%s\" exited"
1711
" with status %d\n", direntry->d_name,
1712
WEXITSTATUS(status));
1713
free(fullname);
1714
continue;
1715
}
1716
} else if(WIFSIGNALED(status)){
1717
fprintf(stderr, "Mandos plugin mandos-client: "
1718
"Warning: network hook \"%s\" died by"
1719
" signal %d\n", direntry->d_name,
1720
WTERMSIG(status));
1721
free(fullname);
1722
continue;
1723
} else {
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" crashed\n",
1726
direntry->d_name);
1727
free(fullname);
1728
continue;
1729
}
1730
}
1731
free(fullname);
1732
if(quit_now){
1733
goto end;
1734
}
1735
}
1736
close(devnull);
1766
1737
}
1767
1738
}
1768
1739
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1772
}
1773
1774
1740
if(not debug){
1775
1741
avahi_set_log_function(empty_log);
1776
1742
}
1790
1756
/* Pick the first interface returned */
1791
1757
interface = strdup(direntries[0]->d_name);
1792
1758
if(debug){
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1759
fprintf(stderr, "Mandos plugin mandos-client: "
1760
"Using interface \"%s\"\n", interface);
1794
1761
}
1795
1762
if(interface == NULL){
1796
1763
perror_plus("malloc");
1801
1768
free(direntries);
1802
1769
} else {
1803
1770
free(direntries);
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1771
fprintf(stderr, "Mandos plugin mandos-client: "
1772
"Could not find a network interface\n");
1805
1773
exitcode = EXIT_FAILURE;
1806
1774
goto end;
1807
1775
}
1813
1781
srand((unsigned int) time(NULL));
1814
1782
mc.simple_poll = avahi_simple_poll_new();
1815
1783
if(mc.simple_poll == NULL){
1816
fprintf_plus(stderr,
1817
"Avahi: Failed to create simple poll object.\n");
1784
fprintf(stderr, "Mandos plugin mandos-client: "
1785
"Avahi: Failed to create simple poll object.\n");
1818
1786
exitcode = EX_UNAVAILABLE;
1819
1787
goto end;
1820
1788
}
1886
1854
if(strcmp(interface, "none") != 0){
1887
1855
if_index = (AvahiIfIndex) if_nametoindex(interface);
1888
1856
if(if_index == 0){
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1857
fprintf(stderr, "Mandos plugin mandos-client: "
1858
"No such interface: \"%s\"\n", interface);
1890
1859
exitcode = EX_UNAVAILABLE;
1891
1860
goto end;
1892
1861
}
2012
1981
#endif /* __linux__ */
2013
1982
/* Lower privileges */
2014
1983
errno = 0;
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
1984
if(take_down_interface){
1985
/* Lower privileges */
1986
ret = seteuid(uid);
1987
if(ret == -1){
1988
perror_plus("seteuid");
1989
}
1990
} else {
1991
/* Lower privileges permanently */
1992
ret = setuid(uid);
1993
if(ret == -1){
1994
perror_plus("setuid");
1995
}
2019
1996
}
2020
1997
}
2021
1998
2025
2002
2026
2003
ret = init_gnutls_global(pubkey, seckey);
2027
2004
if(ret == -1){
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
2005
fprintf(stderr, "Mandos plugin mandos-client: "
2006
"init_gnutls_global failed\n");
2029
2007
exitcode = EX_UNAVAILABLE;
2030
2008
goto end;
2031
2009
} else {
2047
2025
}
2048
2026
2049
2027
if(not init_gpgme(pubkey, seckey, tempdir)){
2050
fprintf_plus(stderr, "init_gpgme failed\n");
2028
fprintf(stderr, "Mandos plugin mandos-client: "
2029
"init_gpgme failed\n");
2051
2030
exitcode = EX_UNAVAILABLE;
2052
2031
goto end;
2053
2032
} else {
2063
2042
/* (Mainly meant for debugging) */
2064
2043
char *address = strrchr(connect_to, ':');
2065
2044
if(address == NULL){
2066
fprintf_plus(stderr, "No colon in address\n");
2045
fprintf(stderr, "Mandos plugin mandos-client: "
2046
"No colon in address\n");
2067
2047
exitcode = EX_USAGE;
2068
2048
goto end;
2069
2049
}
2077
2057
tmpmax = strtoimax(address+1, &tmp, 10);
2078
2058
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2079
2059
or tmpmax != (uint16_t)tmpmax){
2080
fprintf_plus(stderr, "Bad port number\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"Bad port number\n");
2081
2062
exitcode = EX_USAGE;
2082
2063
goto end;
2083
2064
}
2113
2094
break;
2114
2095
}
2115
2096
if(debug){
2116
fprintf_plus(stderr, "Retrying in %d seconds\n",
2117
(int)retry_interval);
2097
fprintf(stderr, "Mandos plugin mandos-client: "
2098
"Retrying in %d seconds\n", (int)retry_interval);
2118
2099
}
2119
2100
sleep((int)retry_interval);
2120
2101
}
2150
2131
2151
2132
/* Check if creating the Avahi server object succeeded */
2152
2133
if(mc.server == NULL){
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2154
avahi_strerror(error));
2134
fprintf(stderr, "Mandos plugin mandos-client: "
2135
"Failed to create Avahi server: %s\n",
2136
avahi_strerror(error));
2155
2137
exitcode = EX_UNAVAILABLE;
2156
2138
goto end;
2157
2139
}
2165
2147
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2166
2148
NULL, 0, browse_callback, NULL);
2167
2149
if(sb == NULL){
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
2150
fprintf(stderr, "Mandos plugin mandos-client: "
2151
"Failed to create service browser: %s\n",
2152
avahi_strerror(avahi_server_errno(mc.server)));
2170
2153
exitcode = EX_UNAVAILABLE;
2171
2154
goto end;
2172
2155
}
2178
2161
/* Run the main loop */
2179
2162
2180
2163
if(debug){
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2164
fprintf(stderr, "Mandos plugin mandos-client: "
2165
"Starting Avahi loop search\n");
2182
2166
}
2183
2167
2184
2168
ret = avahi_loop_with_timeout(mc.simple_poll,
2185
2169
(int)(retry_interval * 1000));
2186
2170
if(debug){
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"avahi_loop_with_timeout exited %s\n",
2173
(ret == 0) ? "successfully" : "with error");
2189
2174
}
2190
2175
2191
2176
end:
2192
2177
2193
2178
if(debug){
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"%s exiting\n", argv[0]);
2195
2181
}
2196
2182
2197
2183
/* Cleanup things */
2213
2199
if(gpgme_initialized){
2214
2200
gpgme_release(mc.ctx);
2215
2201
}
2216
2202
2217
2203
/* Cleans up the circular linked list of Mandos servers the client
2218
2204
has seen */
2219
2205
if(mc.current_server != NULL){
2225
2211
}
2226
2212
}
2227
2213
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2214
/* XXX run network hooks "stop" here */
2230
2215
2231
/* Re-raise priviliges */
2232
{
2216
/* Take down the network interface */
2217
if(take_down_interface){
2218
/* Re-raise priviliges */
2233
2219
errno = 0;
2234
2220
ret = seteuid(0);
2235
2221
if(ret == -1){
2236
2222
perror_plus("seteuid");
2237
2223
}
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
2224
if(geteuid() == 0){
2241
2225
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2242
2226
if(ret == -1){
2243
2227
perror_plus("ioctl SIOCGIFFLAGS");
2252
2236
if(ret == -1){
2253
2237
perror_plus("close");
2254
2238
}
2239
/* Lower privileges permanently */
2240
errno = 0;
2241
ret = setuid(uid);
2242
if(ret == -1){
2243
perror_plus("setuid");
2244
}
2255
2245
}
2256
2246
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
2263
2247
2264
2248
/* Removes the GPGME temp directory and all files inside */
2265
2249
if(tempdir_created){
2279
2263
}
2280
2264
ret = remove(fullname);
2281
2265
if(ret == -1){
2282
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2283
strerror(errno));
2266
fprintf(stderr, "Mandos plugin mandos-client: "
2267
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2284
2268
}
2285
2269
free(fullname);
2286
2270
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0