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237.16.16
(compared to revision 237.16.2)
: plugins.d/mandos-client.c
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- Committer: teddy at bsnet
- Date: 2011-11-28 00:27:49 UTC
- mto: (237.15.12 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@fukt.bsnet.se-20111128002749-hr0te9hsoqfzvu01
* network-hooks.d/bridge: Use "/usr/sbin/brctl" explicitly.
* plugins.d/mandos-client.c (run_network_hooks): Raise priviliges in
child process.
(main): Do not use getuid() to check if running setuid root. Do not
raise privileges for run_network_hooks.
* plugins.d/mandos-client.c (run_network_hooks): Raise priviliges in
child process.
(main): Do not use getuid() to check if running setuid root. Do not
raise privileges for run_network_hooks.
- files added:
- 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() */
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
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
88
91
89
92
#ifdef __linux__
90
93
#include <sys/klog.h> /* klogctl() */
108
111
init_gnutls_session(),
109
112
GNUTLS_* */
110
113
#include <gnutls/openpgp.h>
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
113
116
114
117
/* GPGME */
115
118
#include <gpgme.h> /* All GPGME types, constants and
131
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
132
135
static const char sys_class_net[] = "/sys/class/net";
133
136
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
134
138
135
139
/* Doubly linked list that need to be circularly linked when used */
136
140
typedef struct server{
171
175
perror(print_text);
172
176
}
173
177
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
174
187
/*
175
188
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
189
* bytes. "buffer_capacity" is how much is currently allocated,
177
190
* "buffer_length" is how much is already used.
178
191
*/
179
192
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
193
size_t buffer_capacity){
181
194
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
195
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
196
if(buffer == NULL){
189
202
}
190
203
191
204
/* Add server to set of servers to retry periodically */
192
int add_server(const char *ip, uint16_t port,
193
AvahiIfIndex if_index,
194
int af){
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
195
207
int ret;
196
208
server *new_server = malloc(sizeof(server));
197
209
if(new_server == NULL){
199
211
return -1;
200
212
}
201
213
*new_server = (server){ .ip = strdup(ip),
202
.port = port,
203
.if_index = if_index,
204
.af = af };
214
.port = port,
215
.if_index = if_index,
216
.af = af };
205
217
if(new_server->ip == NULL){
206
218
perror_plus("strdup");
207
219
return -1;
229
241
/*
230
242
* Initialize GPGME.
231
243
*/
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
234
246
gpgme_error_t rc;
235
247
gpgme_engine_info_t engine_info;
236
248
251
263
252
264
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
265
if(rc != GPG_ERR_NO_ERROR){
254
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
255
gpgme_strsource(rc), gpgme_strerror(rc));
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
256
268
return false;
257
269
}
258
270
259
271
rc = gpgme_op_import(mc.ctx, pgp_data);
260
272
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
263
275
return false;
264
276
}
265
277
272
284
}
273
285
274
286
if(debug){
275
fprintf(stderr, "Initializing GPGME\n");
287
fprintf_plus(stderr, "Initializing GPGME\n");
276
288
}
277
289
278
290
/* Init GPGME */
279
291
gpgme_check_version(NULL);
280
292
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
293
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
284
296
return false;
285
297
}
286
298
287
299
/* Set GPGME home directory for the OpenPGP engine only */
288
300
rc = gpgme_get_engine_info(&engine_info);
289
301
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
292
304
return false;
293
305
}
294
306
while(engine_info != NULL){
300
312
engine_info = engine_info->next;
301
313
}
302
314
if(engine_info == NULL){
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
304
317
return false;
305
318
}
306
319
307
320
/* Create new GPGME "context" */
308
321
rc = gpgme_new(&(mc.ctx));
309
322
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
312
326
return false;
313
327
}
314
328
333
347
ssize_t plaintext_length = 0;
334
348
335
349
if(debug){
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
337
351
}
338
352
339
353
/* Create new GPGME data buffer from memory cryptotext */
340
354
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
341
355
0);
342
356
if(rc != GPG_ERR_NO_ERROR){
343
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
344
gpgme_strsource(rc), gpgme_strerror(rc));
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
345
359
return -1;
346
360
}
347
361
348
362
/* Create new empty GPGME data buffer for the plaintext */
349
363
rc = gpgme_data_new(&dh_plain);
350
364
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
353
368
gpgme_data_release(dh_crypto);
354
369
return -1;
355
370
}
358
373
data buffer */
359
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
375
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
363
378
plaintext_length = -1;
364
379
if(debug){
365
380
gpgme_decrypt_result_t result;
366
381
result = gpgme_op_decrypt_result(mc.ctx);
367
382
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
369
384
} else {
370
fprintf(stderr, "Unsupported algorithm: %s\n",
371
result->unsupported_algorithm);
372
fprintf(stderr, "Wrong key usage: %u\n",
373
result->wrong_key_usage);
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);
374
389
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
376
391
}
377
392
gpgme_recipient_t recipient;
378
393
recipient = result->recipients;
379
394
while(recipient != NULL){
380
fprintf(stderr, "Public key algorithm: %s\n",
381
gpgme_pubkey_algo_name(recipient->pubkey_algo));
382
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
383
fprintf(stderr, "Secret key available: %s\n",
384
recipient->status == GPG_ERR_NO_SECKEY
385
? "No" : "Yes");
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");
386
402
recipient = recipient->next;
387
403
}
388
404
}
391
407
}
392
408
393
409
if(debug){
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
395
411
}
396
412
397
413
/* Seek back to the beginning of the GPGME plaintext data buffer */
404
420
*plaintext = NULL;
405
421
while(true){
406
422
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
408
plaintext_capacity);
423
(size_t)plaintext_length,
424
plaintext_capacity);
409
425
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
413
429
}
414
430
415
431
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
428
444
}
429
445
430
446
if(debug){
431
fprintf(stderr, "Decrypted password is: ");
447
fprintf_plus(stderr, "Decrypted password is: ");
432
448
for(ssize_t i = 0; i < plaintext_length; i++){
433
449
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
434
450
}
456
472
/* GnuTLS log function callback */
457
473
static void debuggnutls(__attribute__((unused)) int level,
458
474
const char* string){
459
fprintf(stderr, "GnuTLS: %s", string);
475
fprintf_plus(stderr, "GnuTLS: %s", string);
460
476
}
461
477
462
478
static int init_gnutls_global(const char *pubkeyfilename,
464
480
int ret;
465
481
466
482
if(debug){
467
fprintf(stderr, "Initializing GnuTLS\n");
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
468
484
}
469
485
470
486
ret = gnutls_global_init();
471
487
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
474
490
return -1;
475
491
}
476
492
485
501
/* OpenPGP credentials */
486
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
503
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
490
506
gnutls_global_deinit();
491
507
return -1;
492
508
}
493
509
494
510
if(debug){
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
seckeyfilename);
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
498
515
}
499
516
500
517
ret = gnutls_certificate_set_openpgp_key_file
501
518
(mc.cred, pubkeyfilename, seckeyfilename,
502
519
GNUTLS_OPENPGP_FMT_BASE64);
503
520
if(ret != GNUTLS_E_SUCCESS){
504
fprintf(stderr,
505
"Error[%d] while reading the OpenPGP key pair ('%s',"
506
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
507
fprintf(stderr, "The GnuTLS error is: %s\n",
508
safer_gnutls_strerror(ret));
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));
509
526
goto globalfail;
510
527
}
511
528
512
529
/* GnuTLS server initialization */
513
530
ret = gnutls_dh_params_init(&mc.dh_params);
514
531
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
517
535
goto globalfail;
518
536
}
519
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
538
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
523
541
goto globalfail;
524
542
}
525
543
545
563
}
546
564
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
547
565
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
550
569
}
551
570
552
571
{
559
578
}
560
579
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
580
if(ret != GNUTLS_E_SUCCESS){
562
fprintf(stderr, "Syntax error at: %s\n", err);
563
fprintf(stderr, "GnuTLS error: %s\n",
564
safer_gnutls_strerror(ret));
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
565
584
gnutls_deinit(*session);
566
585
return -1;
567
586
}
576
595
}
577
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
578
597
if(ret != GNUTLS_E_SUCCESS){
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
581
600
gnutls_deinit(*session);
582
601
return -1;
583
602
}
628
647
pf = PF_INET;
629
648
break;
630
649
default:
631
fprintf(stderr, "Bad address family: %d\n", af);
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
632
651
errno = EINVAL;
633
652
return -1;
634
653
}
639
658
}
640
659
641
660
if(debug){
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
644
663
}
645
664
646
665
tcp_sd = socket(pf, SOCK_STREAM, 0);
672
691
}
673
692
if(ret == 0){
674
693
int e = errno;
675
fprintf(stderr, "Bad address: %s\n", ip);
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
676
695
errno = e;
677
696
goto mandos_end;
678
697
}
683
702
684
703
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
704
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
686
-Wunreachable-code*/
705
-Wunreachable-code*/
687
706
if(if_index == AVAHI_IF_UNSPEC){
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
690
709
errno = EINVAL;
691
710
goto mandos_end;
692
711
}
710
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
730
perror_plus("if_indextoname");
712
731
} else {
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
715
734
}
716
735
} else {
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
719
738
}
720
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
731
750
perror_plus("inet_ntop");
732
751
} else {
733
752
if(strcmp(addrstr, ip) != 0){
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
735
754
}
736
755
}
737
756
}
765
784
while(true){
766
785
size_t out_size = strlen(out);
767
786
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
768
out_size - written));
787
out_size - written));
769
788
if(ret == -1){
770
789
int e = errno;
771
790
perror_plus("write");
791
810
}
792
811
793
812
if(debug){
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
795
814
}
796
815
797
816
if(quit_now){
817
836
818
837
if(ret != GNUTLS_E_SUCCESS){
819
838
if(debug){
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
821
840
gnutls_perror(ret);
822
841
}
823
842
errno = EPROTO;
827
846
/* Read OpenPGP packet that contains the wanted password */
828
847
829
848
if(debug){
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
832
851
}
833
852
834
853
while(true){
839
858
}
840
859
841
860
buffer_capacity = incbuffer(&buffer, buffer_length,
842
buffer_capacity);
861
buffer_capacity);
843
862
if(buffer_capacity == 0){
844
863
int e = errno;
845
864
perror_plus("incbuffer");
872
891
}
873
892
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
874
893
if(ret < 0){
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
876
896
gnutls_perror(ret);
877
897
errno = EPROTO;
878
898
goto mandos_end;
879
899
}
880
900
break;
881
901
default:
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
884
904
gnutls_bye(session, GNUTLS_SHUT_RDWR);
885
905
errno = EIO;
886
906
goto mandos_end;
891
911
}
892
912
893
913
if(debug){
894
fprintf(stderr, "Closing TLS session\n");
914
fprintf_plus(stderr, "Closing TLS session\n");
895
915
}
896
916
897
917
if(quit_now){
909
929
910
930
if(buffer_length > 0){
911
931
ssize_t decrypted_buffer_size;
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
914
933
&decrypted_buffer);
915
934
if(decrypted_buffer_size >= 0){
916
935
927
946
if(ret == 0 and ferror(stdout)){
928
947
int e = errno;
929
948
if(debug){
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
932
951
}
933
952
errno = e;
934
953
goto mandos_end;
991
1010
switch(event){
992
1011
default:
993
1012
case AVAHI_RESOLVER_FAILURE:
994
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
995
" of type '%s' in domain '%s': %s\n", name, type, domain,
996
avahi_strerror(avahi_server_errno(mc.server)));
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)));
997
1017
break;
998
1018
999
1019
case AVAHI_RESOLVER_FOUND:
1001
1021
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1022
avahi_address_snprint(ip, sizeof(ip), address);
1003
1023
if(debug){
1004
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1005
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1006
ip, (intmax_t)interface, port);
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);
1007
1027
}
1008
1028
int ret = start_mandos_communication(ip, port, interface,
1009
1029
avahi_proto_to_af(proto));
1041
1061
default:
1042
1062
case AVAHI_BROWSER_FAILURE:
1043
1063
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1046
1066
avahi_simple_poll_quit(mc.simple_poll);
1047
1067
return;
1048
1068
1055
1075
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1076
name, type, domain, protocol, 0,
1057
1077
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
1060
1081
break;
1061
1082
1062
1083
case AVAHI_BROWSER_REMOVE:
1065
1086
case AVAHI_BROWSER_ALL_FOR_NOW:
1066
1087
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1067
1088
if(debug){
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1069
1091
}
1070
1092
break;
1071
1093
}
1110
1132
/* Reject the loopback device */
1111
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1112
1134
if(debug){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1115
1137
}
1116
1138
return false;
1117
1139
}
1118
1140
/* Accept point-to-point devices only if connect_to is specified */
1119
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1120
1142
if(debug){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1123
1145
}
1124
1146
return true;
1125
1147
}
1126
1148
/* Otherwise, reject non-broadcast-capable devices */
1127
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1128
1150
if(debug){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1131
1153
}
1132
1154
return false;
1133
1155
}
1134
1156
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1157
if(ifr->ifr_flags & IFF_NOARP){
1136
1158
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1138
1161
}
1139
1162
return false;
1140
1163
}
1141
1164
1142
1165
/* Accept this device */
1143
1166
if(debug){
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1145
1168
}
1146
1169
return true;
1147
1170
}
1159
1182
struct ifreq ifr;
1160
1183
if(not get_flags(if_entry->d_name, &ifr)){
1161
1184
if(debug){
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1164
1187
}
1165
1188
return 0;
1166
1189
}
1184
1207
struct ifreq ifr;
1185
1208
if(not get_flags(if_entry->d_name, &ifr)){
1186
1209
if(debug){
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1189
1212
}
1190
1213
return 0;
1191
1214
}
1193
1216
/* Reject down interfaces */
1194
1217
if(not (ifr.ifr_flags & IFF_UP)){
1195
1218
if(debug){
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1198
1221
}
1199
1222
return 0;
1200
1223
}
1202
1225
/* Reject non-running interfaces */
1203
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1204
1227
if(debug){
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1207
1230
}
1208
1231
return 0;
1209
1232
}
1228
1251
/* Is this directory entry a runnable program? */
1229
1252
int runnable_hook(const struct dirent *direntry){
1230
1253
int ret;
1254
size_t sret;
1231
1255
struct stat st;
1232
1256
1233
1257
if((direntry->d_name)[0] == '\0'){
1235
1259
return 0;
1236
1260
}
1237
1261
1238
/* Save pointer to last character */
1239
char *end = strchr(direntry->d_name, '\0')-1;
1240
1241
if(*end == '~'){
1242
/* Backup name~ */
1243
return 0;
1244
}
1245
1246
if(((direntry->d_name)[0] == '#')
1247
and (*end == '#')){
1248
/* Temporary #name# */
1249
return 0;
1250
}
1251
1252
/* XXX more rules here */
1253
1254
ret = stat(direntry->d_name, &st);
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);
1255
1283
if(ret == -1){
1256
1284
if(debug){
1257
perror_plus("Could not stat plugin");
1285
perror_plus("Could not stat hook");
1258
1286
}
1259
1287
return 0;
1260
1288
}
1261
1289
if(not (S_ISREG(st.st_mode))){
1262
1290
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1263
1295
return 0;
1264
1296
}
1265
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1266
1298
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1267
1303
return 0;
1268
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1269
1309
return 1;
1270
1310
}
1271
1311
1278
1318
while(true){
1279
1319
if(mc.current_server == NULL){
1280
1320
if (debug){
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1283
1323
}
1284
1324
ret = avahi_simple_poll_iterate(s, -1);
1285
1325
} else {
1286
1326
if (debug){
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1289
1329
}
1290
1330
/* the current time */
1291
1331
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1307
1347
- ((intmax_t)waited_time.tv_nsec / 1000000));
1308
1348
1309
1349
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1311
1352
}
1312
1353
1313
1354
if(block_time <= 0){
1333
1374
ret = avahi_simple_poll_iterate(s, (int)block_time);
1334
1375
}
1335
1376
if(ret != 0){
1336
if (ret > 0 or errno != EINTR) {
1377
if (ret > 0 or errno != EINTR){
1337
1378
return (ret != 1) ? ret : 0;
1338
1379
}
1339
1380
}
1340
1381
}
1341
1382
}
1342
1383
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
fprintf_plus(stderr, "Child: getuid() = %d\n", getuid());
1435
fprintf_plus(stderr, "Child: geteuid() = %d\n", geteuid());
1436
dup2(devnull, STDIN_FILENO);
1437
close(devnull);
1438
dup2(STDERR_FILENO, STDOUT_FILENO);
1439
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1440
if(ret == -1){
1441
perror_plus("setenv");
1442
_exit(EX_OSERR);
1443
}
1444
ret = setenv("DEVICE", interface, 1);
1445
if(ret == -1){
1446
perror_plus("setenv");
1447
_exit(EX_OSERR);
1448
}
1449
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1450
if(ret == -1){
1451
perror_plus("setenv");
1452
_exit(EX_OSERR);
1453
}
1454
ret = setenv("MODE", mode, 1);
1455
if(ret == -1){
1456
perror_plus("setenv");
1457
_exit(EX_OSERR);
1458
}
1459
char *delaystring;
1460
ret = asprintf(&delaystring, "%f", delay);
1461
if(ret == -1){
1462
perror_plus("asprintf");
1463
_exit(EX_OSERR);
1464
}
1465
ret = setenv("DELAY", delaystring, 1);
1466
if(ret == -1){
1467
free(delaystring);
1468
perror_plus("setenv");
1469
_exit(EX_OSERR);
1470
}
1471
free(delaystring);
1472
ret = execl(fullname, direntry->d_name, mode, NULL);
1473
perror_plus("execl");
1474
} else {
1475
int status;
1476
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1477
perror_plus("waitpid");
1478
free(fullname);
1479
continue;
1480
}
1481
if(WIFEXITED(status)){
1482
if(WEXITSTATUS(status) != 0){
1483
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1486
free(fullname);
1487
continue;
1488
}
1489
} else if(WIFSIGNALED(status)){
1490
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1491
" signal %d\n", direntry->d_name,
1492
WTERMSIG(status));
1493
free(fullname);
1494
continue;
1495
} else {
1496
fprintf_plus(stderr, "Warning: network hook \"%s\""
1497
" crashed\n", direntry->d_name);
1498
free(fullname);
1499
continue;
1500
}
1501
}
1502
free(fullname);
1503
if(debug){
1504
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1505
direntry->d_name);
1506
}
1507
}
1508
close(devnull);
1509
}
1510
return true;
1511
}
1512
1343
1513
int main(int argc, char *argv[]){
1344
1514
AvahiSServiceBrowser *sb = NULL;
1345
1515
int error;
1427
1597
.arg = "SECONDS",
1428
1598
.doc = "Retry interval used when denied by the mandos server",
1429
1599
.group = 2 },
1600
{ .name = "network-hook-dir", .key = 133,
1601
.arg = "DIR",
1602
.doc = "Directory where network hooks are located",
1603
.group = 2 },
1430
1604
/*
1431
1605
* These reproduce what we would get without ARGP_NO_HELP
1432
1606
*/
1485
1659
argp_error(state, "Bad retry interval");
1486
1660
}
1487
1661
break;
1662
case 133: /* --network-hook-dir */
1663
hookdir = arg;
1664
break;
1488
1665
/*
1489
1666
* These reproduce what we would get without ARGP_NO_HELP
1490
1667
*/
1496
1673
argp_state_help(state, state->out_stream,
1497
1674
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1498
1675
case 'V': /* --version */
1499
fprintf(state->out_stream, "%s\n", argp_program_version);
1676
fprintf_plus(state->out_stream,
1677
"Mandos plugin mandos-client: ");
1678
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1500
1679
exit(argp_err_exit_status);
1501
1680
break;
1502
1681
default:
1529
1708
{
1530
1709
/* Work around Debian bug #633582:
1531
1710
<http://bugs.debian.org/633582> */
1532
struct stat st;
1533
1711
1534
1712
/* Re-raise priviliges */
1535
1713
errno = 0;
1536
1714
ret = seteuid(0);
1537
1715
if(ret == -1){
1538
1716
perror_plus("seteuid");
1539
}
1540
1541
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1542
int seckey_fd = open(seckey, O_RDONLY);
1543
if(seckey_fd == -1){
1544
perror_plus("open");
1545
} else {
1546
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1547
if(ret == -1){
1548
perror_plus("fstat");
1549
} else {
1550
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1551
ret = fchown(seckey_fd, uid, gid);
1552
if(ret == -1){
1553
perror_plus("fchown");
1554
}
1555
}
1556
}
1557
TEMP_FAILURE_RETRY(close(seckey_fd));
1558
}
1559
}
1560
1561
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1562
int pubkey_fd = open(pubkey, O_RDONLY);
1563
if(pubkey_fd == -1){
1564
perror_plus("open");
1565
} else {
1566
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1567
if(ret == -1){
1568
perror_plus("fstat");
1569
} else {
1570
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1571
ret = fchown(pubkey_fd, uid, gid);
1572
if(ret == -1){
1573
perror_plus("fchown");
1574
}
1575
}
1576
}
1577
TEMP_FAILURE_RETRY(close(pubkey_fd));
1578
}
1579
}
1580
1581
/* Lower privileges */
1582
errno = 0;
1583
ret = seteuid(uid);
1584
if(ret == -1){
1585
perror_plus("seteuid");
1717
} else {
1718
struct stat st;
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode)
1730
and st.st_uid == 0 and st.st_gid == 0){
1731
ret = fchown(seckey_fd, uid, gid);
1732
if(ret == -1){
1733
perror_plus("fchown");
1734
}
1735
}
1736
}
1737
TEMP_FAILURE_RETRY(close(seckey_fd));
1738
}
1739
}
1740
1741
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1742
int pubkey_fd = open(pubkey, O_RDONLY);
1743
if(pubkey_fd == -1){
1744
perror_plus("open");
1745
} else {
1746
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1747
if(ret == -1){
1748
perror_plus("fstat");
1749
} else {
1750
if(S_ISREG(st.st_mode)
1751
and st.st_uid == 0 and st.st_gid == 0){
1752
ret = fchown(pubkey_fd, uid, gid);
1753
if(ret == -1){
1754
perror_plus("fchown");
1755
}
1756
}
1757
}
1758
TEMP_FAILURE_RETRY(close(pubkey_fd));
1759
}
1760
}
1761
1762
/* Lower privileges */
1763
errno = 0;
1764
ret = seteuid(uid);
1765
if(ret == -1){
1766
perror_plus("seteuid");
1767
}
1586
1768
}
1587
1769
}
1588
1770
1589
/* Find network hooks and run them */
1590
{
1591
struct dirent **direntries;
1592
struct dirent *direntry;
1593
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1594
alphasort);
1595
int devnull = open("/dev/null", O_RDONLY);
1596
for(int i = 0; i < numhooks; i++){
1597
direntry = direntries[0];
1598
char *fullname = NULL;
1599
ret = asprintf(&fullname, "%s/%s", tempdir,
1600
direntry->d_name);
1601
if(ret < 0){
1602
perror_plus("asprintf");
1603
continue;
1604
}
1605
pid_t hook_pid = fork();
1606
if(hook_pid == 0){
1607
/* Child */
1608
dup2(devnull, STDIN_FILENO);
1609
close(devnull);
1610
dup2(STDERR_FILENO, STDOUT_FILENO);
1611
ret = setenv("DEVICE", interface, 1);
1612
if(ret == -1){
1613
perror_plus("setenv");
1614
exit(1);
1615
}
1616
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1617
if(ret == -1){
1618
perror_plus("setenv");
1619
exit(1);
1620
}
1621
ret = setenv("MODE", "start", 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
exit(1);
1625
}
1626
char *delaystring;
1627
ret = asprintf(&delaystring, "%f", delay);
1628
if(ret == -1){
1629
perror_plus("asprintf");
1630
exit(1);
1631
}
1632
ret = setenv("DELAY", delaystring, 1);
1633
if(ret == -1){
1634
free(delaystring);
1635
perror_plus("setenv");
1636
exit(1);
1637
}
1638
free(delaystring);
1639
ret = execl(fullname, direntry->d_name, "start", NULL);
1640
perror_plus("execl");
1641
}
1642
free(fullname);
1643
if(quit_now){
1644
goto end;
1645
}
1646
}
1647
close(devnull);
1771
/* Run network hooks */
1772
if(not run_network_hooks("start", interface, delay)){
1773
goto end;
1648
1774
}
1649
1775
1650
1776
if(not debug){
1666
1792
/* Pick the first interface returned */
1667
1793
interface = strdup(direntries[0]->d_name);
1668
1794
if(debug){
1669
fprintf(stderr, "Using interface \"%s\"\n", interface);
1795
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1670
1796
}
1671
1797
if(interface == NULL){
1672
1798
perror_plus("malloc");
1677
1803
free(direntries);
1678
1804
} else {
1679
1805
free(direntries);
1680
fprintf(stderr, "Could not find a network interface\n");
1806
fprintf_plus(stderr, "Could not find a network interface\n");
1681
1807
exitcode = EXIT_FAILURE;
1682
1808
goto end;
1683
1809
}
1689
1815
srand((unsigned int) time(NULL));
1690
1816
mc.simple_poll = avahi_simple_poll_new();
1691
1817
if(mc.simple_poll == NULL){
1692
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1818
fprintf_plus(stderr,
1819
"Avahi: Failed to create simple poll object.\n");
1693
1820
exitcode = EX_UNAVAILABLE;
1694
1821
goto end;
1695
1822
}
1761
1888
if(strcmp(interface, "none") != 0){
1762
1889
if_index = (AvahiIfIndex) if_nametoindex(interface);
1763
1890
if(if_index == 0){
1764
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1891
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1765
1892
exitcode = EX_UNAVAILABLE;
1766
1893
goto end;
1767
1894
}
1887
2014
#endif /* __linux__ */
1888
2015
/* Lower privileges */
1889
2016
errno = 0;
1890
if(take_down_interface){
1891
/* Lower privileges */
1892
ret = seteuid(uid);
1893
if(ret == -1){
1894
perror_plus("seteuid");
1895
}
1896
} else {
1897
/* Lower privileges permanently */
1898
ret = setuid(uid);
1899
if(ret == -1){
1900
perror_plus("setuid");
1901
}
2017
/* Lower privileges */
2018
ret = seteuid(uid);
2019
if(ret == -1){
2020
perror_plus("seteuid");
1902
2021
}
1903
2022
}
1904
2023
1908
2027
1909
2028
ret = init_gnutls_global(pubkey, seckey);
1910
2029
if(ret == -1){
1911
fprintf(stderr, "init_gnutls_global failed\n");
2030
fprintf_plus(stderr, "init_gnutls_global failed\n");
1912
2031
exitcode = EX_UNAVAILABLE;
1913
2032
goto end;
1914
2033
} else {
1930
2049
}
1931
2050
1932
2051
if(not init_gpgme(pubkey, seckey, tempdir)){
1933
fprintf(stderr, "init_gpgme failed\n");
2052
fprintf_plus(stderr, "init_gpgme failed\n");
1934
2053
exitcode = EX_UNAVAILABLE;
1935
2054
goto end;
1936
2055
} else {
1946
2065
/* (Mainly meant for debugging) */
1947
2066
char *address = strrchr(connect_to, ':');
1948
2067
if(address == NULL){
1949
fprintf(stderr, "No colon in address\n");
2068
fprintf_plus(stderr, "No colon in address\n");
1950
2069
exitcode = EX_USAGE;
1951
2070
goto end;
1952
2071
}
1960
2079
tmpmax = strtoimax(address+1, &tmp, 10);
1961
2080
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1962
2081
or tmpmax != (uint16_t)tmpmax){
1963
fprintf(stderr, "Bad port number\n");
2082
fprintf_plus(stderr, "Bad port number\n");
1964
2083
exitcode = EX_USAGE;
1965
2084
goto end;
1966
2085
}
1996
2115
break;
1997
2116
}
1998
2117
if(debug){
1999
fprintf(stderr, "Retrying in %d seconds\n",
2000
(int)retry_interval);
2118
fprintf_plus(stderr, "Retrying in %d seconds\n",
2119
(int)retry_interval);
2001
2120
}
2002
2121
sleep((int)retry_interval);
2003
2122
}
2033
2152
2034
2153
/* Check if creating the Avahi server object succeeded */
2035
2154
if(mc.server == NULL){
2036
fprintf(stderr, "Failed to create Avahi server: %s\n",
2037
avahi_strerror(error));
2155
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2156
avahi_strerror(error));
2038
2157
exitcode = EX_UNAVAILABLE;
2039
2158
goto end;
2040
2159
}
2048
2167
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2049
2168
NULL, 0, browse_callback, NULL);
2050
2169
if(sb == NULL){
2051
fprintf(stderr, "Failed to create service browser: %s\n",
2052
avahi_strerror(avahi_server_errno(mc.server)));
2170
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2171
avahi_strerror(avahi_server_errno(mc.server)));
2053
2172
exitcode = EX_UNAVAILABLE;
2054
2173
goto end;
2055
2174
}
2061
2180
/* Run the main loop */
2062
2181
2063
2182
if(debug){
2064
fprintf(stderr, "Starting Avahi loop search\n");
2183
fprintf_plus(stderr, "Starting Avahi loop search\n");
2065
2184
}
2066
2185
2067
2186
ret = avahi_loop_with_timeout(mc.simple_poll,
2068
2187
(int)(retry_interval * 1000));
2069
2188
if(debug){
2070
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2071
(ret == 0) ? "successfully" : "with error");
2189
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2190
(ret == 0) ? "successfully" : "with error");
2072
2191
}
2073
2192
2074
2193
end:
2075
2194
2076
2195
if(debug){
2077
fprintf(stderr, "%s exiting\n", argv[0]);
2196
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2078
2197
}
2079
2198
2080
2199
/* Cleanup things */
2096
2215
if(gpgme_initialized){
2097
2216
gpgme_release(mc.ctx);
2098
2217
}
2099
2218
2100
2219
/* Cleans up the circular linked list of Mandos servers the client
2101
2220
has seen */
2102
2221
if(mc.current_server != NULL){
2108
2227
}
2109
2228
}
2110
2229
2111
/* XXX run network hooks "stop" here */
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2112
2232
2113
/* Take down the network interface */
2114
if(take_down_interface){
2115
/* Re-raise priviliges */
2233
/* Re-raise priviliges */
2234
{
2116
2235
errno = 0;
2117
2236
ret = seteuid(0);
2118
2237
if(ret == -1){
2119
2238
perror_plus("seteuid");
2120
2239
}
2121
if(geteuid() == 0){
2240
2241
/* Take down the network interface */
2242
if(take_down_interface and geteuid() == 0){
2122
2243
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2123
2244
if(ret == -1){
2124
2245
perror_plus("ioctl SIOCGIFFLAGS");
2125
} else if(network.ifr_flags & IFF_UP) {
2246
} else if(network.ifr_flags & IFF_UP){
2126
2247
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2127
2248
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2128
2249
if(ret == -1){
2133
2254
if(ret == -1){
2134
2255
perror_plus("close");
2135
2256
}
2136
/* Lower privileges permanently */
2137
errno = 0;
2138
ret = setuid(uid);
2139
if(ret == -1){
2140
perror_plus("setuid");
2141
}
2142
2257
}
2143
2258
}
2259
/* Lower privileges permanently */
2260
errno = 0;
2261
ret = setuid(uid);
2262
if(ret == -1){
2263
perror_plus("setuid");
2264
}
2144
2265
2145
2266
/* Removes the GPGME temp directory and all files inside */
2146
2267
if(tempdir_created){
2160
2281
}
2161
2282
ret = remove(fullname);
2162
2283
if(ret == -1){
2163
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2164
strerror(errno));
2284
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2285
strerror(errno));
2165
2286
}
2166
2287
free(fullname);
2167
2288
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0