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- Committer: teddy at bsnet
- Date: 2011-12-24 23:17:02 UTC
- Revision ID: teddy@fukt.bsnet.se-20111224231702-1ffgu6r02p0bz9co
* plugins.d/splashy.c (error_plus): Check format string.
* plugins.d/askpass-fifo.c (error_plus): - '' -
* plugins.d/plymouth.c (error_plus): - '' -
* plugins.d/password-prompt.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): - '' -
* plugins.d/plymouth.c (error_plus): - '' -
* plugins.d/password-prompt.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- files added:
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
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
__attribute__((format (gnu_printf, 2, 3)))
179
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_list ap;
181
va_start (ap, format);
182
183
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
184
program_invocation_short_name));
185
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
186
}
187
174
188
/*
175
189
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
190
* bytes. "buffer_capacity" is how much is currently allocated,
177
191
* "buffer_length" is how much is already used.
178
192
*/
179
193
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
194
size_t buffer_capacity){
181
195
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
196
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
197
if(buffer == NULL){
189
203
}
190
204
191
205
/* 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){
206
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
int af){
195
208
int ret;
196
209
server *new_server = malloc(sizeof(server));
197
210
if(new_server == NULL){
198
211
perror_plus("malloc");
199
return -1;
212
return false;
200
213
}
201
214
*new_server = (server){ .ip = strdup(ip),
202
.port = port,
203
.if_index = if_index,
204
.af = af };
215
.port = port,
216
.if_index = if_index,
217
.af = af };
205
218
if(new_server->ip == NULL){
206
219
perror_plus("strdup");
207
return -1;
220
return false;
208
221
}
209
222
/* Special case of first server */
210
223
if (mc.current_server == NULL){
221
234
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
235
if(ret == -1){
223
236
perror_plus("clock_gettime");
224
return -1;
237
return false;
225
238
}
226
return 0;
239
return true;
227
240
}
228
241
229
242
/*
230
243
* Initialize GPGME.
231
244
*/
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
245
static bool init_gpgme(const char *seckey, const char *pubkey,
246
const char *tempdir){
234
247
gpgme_error_t rc;
235
248
gpgme_engine_info_t engine_info;
236
249
251
264
252
265
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
266
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));
267
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
268
gpgme_strsource(rc), gpgme_strerror(rc));
256
269
return false;
257
270
}
258
271
259
272
rc = gpgme_op_import(mc.ctx, pgp_data);
260
273
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
274
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
263
276
return false;
264
277
}
265
278
272
285
}
273
286
274
287
if(debug){
275
fprintf(stderr, "Initializing GPGME\n");
288
fprintf_plus(stderr, "Initializing GPGME\n");
276
289
}
277
290
278
291
/* Init GPGME */
279
292
gpgme_check_version(NULL);
280
293
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
294
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
295
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
296
gpgme_strsource(rc), gpgme_strerror(rc));
284
297
return false;
285
298
}
286
299
287
300
/* Set GPGME home directory for the OpenPGP engine only */
288
301
rc = gpgme_get_engine_info(&engine_info);
289
302
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
303
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
292
305
return false;
293
306
}
294
307
while(engine_info != NULL){
300
313
engine_info = engine_info->next;
301
314
}
302
315
if(engine_info == NULL){
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
317
tempdir);
304
318
return false;
305
319
}
306
320
307
321
/* Create new GPGME "context" */
308
322
rc = gpgme_new(&(mc.ctx));
309
323
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
324
fprintf_plus(stderr, "Mandos plugin mandos-client: "
325
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
326
gpgme_strerror(rc));
312
327
return false;
313
328
}
314
329
333
348
ssize_t plaintext_length = 0;
334
349
335
350
if(debug){
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
351
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
337
352
}
338
353
339
354
/* Create new GPGME data buffer from memory cryptotext */
340
355
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
341
356
0);
342
357
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));
358
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
359
gpgme_strsource(rc), gpgme_strerror(rc));
345
360
return -1;
346
361
}
347
362
348
363
/* Create new empty GPGME data buffer for the plaintext */
349
364
rc = gpgme_data_new(&dh_plain);
350
365
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
366
fprintf_plus(stderr, "Mandos plugin mandos-client: "
367
"bad gpgme_data_new: %s: %s\n",
368
gpgme_strsource(rc), gpgme_strerror(rc));
353
369
gpgme_data_release(dh_crypto);
354
370
return -1;
355
371
}
358
374
data buffer */
359
375
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
376
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
377
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
363
379
plaintext_length = -1;
364
380
if(debug){
365
381
gpgme_decrypt_result_t result;
366
382
result = gpgme_op_decrypt_result(mc.ctx);
367
383
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
369
385
} 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);
386
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf_plus(stderr, "Wrong key usage: %u\n",
389
result->wrong_key_usage);
374
390
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
391
fprintf_plus(stderr, "File name: %s\n", result->file_name);
376
392
}
377
393
gpgme_recipient_t recipient;
378
394
recipient = result->recipients;
379
395
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");
396
fprintf_plus(stderr, "Public key algorithm: %s\n",
397
gpgme_pubkey_algo_name
398
(recipient->pubkey_algo));
399
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
400
fprintf_plus(stderr, "Secret key available: %s\n",
401
recipient->status == GPG_ERR_NO_SECKEY
402
? "No" : "Yes");
386
403
recipient = recipient->next;
387
404
}
388
405
}
391
408
}
392
409
393
410
if(debug){
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
411
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
395
412
}
396
413
397
414
/* Seek back to the beginning of the GPGME plaintext data buffer */
404
421
*plaintext = NULL;
405
422
while(true){
406
423
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
408
plaintext_capacity);
424
(size_t)plaintext_length,
425
plaintext_capacity);
409
426
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
427
perror_plus("incbuffer");
428
plaintext_length = -1;
429
goto decrypt_end;
413
430
}
414
431
415
432
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
428
445
}
429
446
430
447
if(debug){
431
fprintf(stderr, "Decrypted password is: ");
448
fprintf_plus(stderr, "Decrypted password is: ");
432
449
for(ssize_t i = 0; i < plaintext_length; i++){
433
450
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
434
451
}
456
473
/* GnuTLS log function callback */
457
474
static void debuggnutls(__attribute__((unused)) int level,
458
475
const char* string){
459
fprintf(stderr, "GnuTLS: %s", string);
476
fprintf_plus(stderr, "GnuTLS: %s", string);
460
477
}
461
478
462
479
static int init_gnutls_global(const char *pubkeyfilename,
464
481
int ret;
465
482
466
483
if(debug){
467
fprintf(stderr, "Initializing GnuTLS\n");
484
fprintf_plus(stderr, "Initializing GnuTLS\n");
468
485
}
469
486
470
487
ret = gnutls_global_init();
471
488
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
489
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
490
safer_gnutls_strerror(ret));
474
491
return -1;
475
492
}
476
493
485
502
/* OpenPGP credentials */
486
503
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
504
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
505
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
506
safer_gnutls_strerror(ret));
490
507
gnutls_global_deinit();
491
508
return -1;
492
509
}
493
510
494
511
if(debug){
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
seckeyfilename);
512
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
513
" secret key %s as GnuTLS credentials\n",
514
pubkeyfilename,
515
seckeyfilename);
498
516
}
499
517
500
518
ret = gnutls_certificate_set_openpgp_key_file
501
519
(mc.cred, pubkeyfilename, seckeyfilename,
502
520
GNUTLS_OPENPGP_FMT_BASE64);
503
521
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));
522
fprintf_plus(stderr,
523
"Error[%d] while reading the OpenPGP key pair ('%s',"
524
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
525
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
526
safer_gnutls_strerror(ret));
509
527
goto globalfail;
510
528
}
511
529
512
530
/* GnuTLS server initialization */
513
531
ret = gnutls_dh_params_init(&mc.dh_params);
514
532
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
533
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
534
" initialization: %s\n",
535
safer_gnutls_strerror(ret));
517
536
goto globalfail;
518
537
}
519
538
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
539
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
540
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
541
safer_gnutls_strerror(ret));
523
542
goto globalfail;
524
543
}
525
544
545
564
}
546
565
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
547
566
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
567
fprintf_plus(stderr,
568
"Error in GnuTLS session initialization: %s\n",
569
safer_gnutls_strerror(ret));
550
570
}
551
571
552
572
{
559
579
}
560
580
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
581
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));
582
fprintf_plus(stderr, "Syntax error at: %s\n", err);
583
fprintf_plus(stderr, "GnuTLS error: %s\n",
584
safer_gnutls_strerror(ret));
565
585
gnutls_deinit(*session);
566
586
return -1;
567
587
}
576
596
}
577
597
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
578
598
if(ret != GNUTLS_E_SUCCESS){
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
599
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
600
safer_gnutls_strerror(ret));
581
601
gnutls_deinit(*session);
582
602
return -1;
583
603
}
628
648
pf = PF_INET;
629
649
break;
630
650
default:
631
fprintf(stderr, "Bad address family: %d\n", af);
651
fprintf_plus(stderr, "Bad address family: %d\n", af);
632
652
errno = EINVAL;
633
653
return -1;
634
654
}
639
659
}
640
660
641
661
if(debug){
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
662
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
663
PRIu16 "\n", ip, port);
644
664
}
645
665
646
666
tcp_sd = socket(pf, SOCK_STREAM, 0);
672
692
}
673
693
if(ret == 0){
674
694
int e = errno;
675
fprintf(stderr, "Bad address: %s\n", ip);
695
fprintf_plus(stderr, "Bad address: %s\n", ip);
676
696
errno = e;
677
697
goto mandos_end;
678
698
}
683
703
684
704
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
705
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
686
-Wunreachable-code*/
706
-Wunreachable-code*/
687
707
if(if_index == AVAHI_IF_UNSPEC){
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
708
fprintf_plus(stderr, "An IPv6 link-local address is"
709
" incomplete without a network interface\n");
690
710
errno = EINVAL;
691
711
goto mandos_end;
692
712
}
710
730
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
731
perror_plus("if_indextoname");
712
732
} else {
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
733
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
734
"\n", ip, interface, port);
715
735
}
716
736
} else {
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
737
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
738
ip, port);
719
739
}
720
740
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
741
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
731
751
perror_plus("inet_ntop");
732
752
} else {
733
753
if(strcmp(addrstr, ip) != 0){
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
754
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
735
755
}
736
756
}
737
757
}
765
785
while(true){
766
786
size_t out_size = strlen(out);
767
787
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
768
out_size - written));
788
out_size - written));
769
789
if(ret == -1){
770
790
int e = errno;
771
791
perror_plus("write");
791
811
}
792
812
793
813
if(debug){
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
814
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
795
815
}
796
816
797
817
if(quit_now){
817
837
818
838
if(ret != GNUTLS_E_SUCCESS){
819
839
if(debug){
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
840
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
821
841
gnutls_perror(ret);
822
842
}
823
843
errno = EPROTO;
827
847
/* Read OpenPGP packet that contains the wanted password */
828
848
829
849
if(debug){
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
850
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
851
" %s\n", ip);
832
852
}
833
853
834
854
while(true){
839
859
}
840
860
841
861
buffer_capacity = incbuffer(&buffer, buffer_length,
842
buffer_capacity);
862
buffer_capacity);
843
863
if(buffer_capacity == 0){
844
864
int e = errno;
845
865
perror_plus("incbuffer");
872
892
}
873
893
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
874
894
if(ret < 0){
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
896
"***\n");
876
897
gnutls_perror(ret);
877
898
errno = EPROTO;
878
899
goto mandos_end;
879
900
}
880
901
break;
881
902
default:
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
903
fprintf_plus(stderr, "Unknown error while reading data from"
904
" encrypted session with Mandos server\n");
884
905
gnutls_bye(session, GNUTLS_SHUT_RDWR);
885
906
errno = EIO;
886
907
goto mandos_end;
891
912
}
892
913
893
914
if(debug){
894
fprintf(stderr, "Closing TLS session\n");
915
fprintf_plus(stderr, "Closing TLS session\n");
895
916
}
896
917
897
918
if(quit_now){
909
930
910
931
if(buffer_length > 0){
911
932
ssize_t decrypted_buffer_size;
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
933
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
914
934
&decrypted_buffer);
915
935
if(decrypted_buffer_size >= 0){
916
936
927
947
if(ret == 0 and ferror(stdout)){
928
948
int e = errno;
929
949
if(debug){
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
950
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
951
strerror(errno));
932
952
}
933
953
errno = e;
934
954
goto mandos_end;
991
1011
switch(event){
992
1012
default:
993
1013
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)));
1014
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1015
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
domain,
1017
avahi_strerror(avahi_server_errno(mc.server)));
997
1018
break;
998
1019
999
1020
case AVAHI_RESOLVER_FOUND:
1001
1022
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1023
avahi_address_snprint(ip, sizeof(ip), address);
1003
1024
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);
1025
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1026
PRIdMAX ") on port %" PRIu16 "\n", name,
1027
host_name, ip, (intmax_t)interface, port);
1007
1028
}
1008
1029
int ret = start_mandos_communication(ip, port, interface,
1009
1030
avahi_proto_to_af(proto));
1010
1031
if(ret == 0){
1011
1032
avahi_simple_poll_quit(mc.simple_poll);
1012
1033
} else {
1013
ret = add_server(ip, port, interface,
1014
avahi_proto_to_af(proto));
1034
if(not add_server(ip, port, interface,
1035
avahi_proto_to_af(proto))){
1036
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1037
" list\n", name);
1038
}
1015
1039
}
1016
1040
}
1017
1041
}
1041
1065
default:
1042
1066
case AVAHI_BROWSER_FAILURE:
1043
1067
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1068
fprintf_plus(stderr, "(Avahi browser) %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
1046
1070
avahi_simple_poll_quit(mc.simple_poll);
1047
1071
return;
1048
1072
1055
1079
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1080
name, type, domain, protocol, 0,
1057
1081
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1082
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1083
" %s\n", name,
1084
avahi_strerror(avahi_server_errno(mc.server)));
1060
1085
break;
1061
1086
1062
1087
case AVAHI_BROWSER_REMOVE:
1065
1090
case AVAHI_BROWSER_ALL_FOR_NOW:
1066
1091
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1067
1092
if(debug){
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1093
fprintf_plus(stderr, "No Mandos server found, still"
1094
" searching...\n");
1069
1095
}
1070
1096
break;
1071
1097
}
1110
1136
/* Reject the loopback device */
1111
1137
if(ifr->ifr_flags & IFF_LOOPBACK){
1112
1138
if(debug){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1139
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1140
ifname);
1115
1141
}
1116
1142
return false;
1117
1143
}
1118
1144
/* Accept point-to-point devices only if connect_to is specified */
1119
1145
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1120
1146
if(debug){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1147
fprintf_plus(stderr, "Accepting point-to-point interface"
1148
" \"%s\"\n", ifname);
1123
1149
}
1124
1150
return true;
1125
1151
}
1126
1152
/* Otherwise, reject non-broadcast-capable devices */
1127
1153
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1128
1154
if(debug){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1155
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1156
" \"%s\"\n", ifname);
1131
1157
}
1132
1158
return false;
1133
1159
}
1134
1160
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1161
if(ifr->ifr_flags & IFF_NOARP){
1136
1162
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1163
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
ifname);
1138
1165
}
1139
1166
return false;
1140
1167
}
1141
1168
1142
1169
/* Accept this device */
1143
1170
if(debug){
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1171
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1145
1172
}
1146
1173
return true;
1147
1174
}
1159
1186
struct ifreq ifr;
1160
1187
if(not get_flags(if_entry->d_name, &ifr)){
1161
1188
if(debug){
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1189
fprintf_plus(stderr, "Failed to get flags for interface "
1190
"\"%s\"\n", if_entry->d_name);
1164
1191
}
1165
1192
return 0;
1166
1193
}
1184
1211
struct ifreq ifr;
1185
1212
if(not get_flags(if_entry->d_name, &ifr)){
1186
1213
if(debug){
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1214
fprintf_plus(stderr, "Failed to get flags for interface "
1215
"\"%s\"\n", if_entry->d_name);
1189
1216
}
1190
1217
return 0;
1191
1218
}
1193
1220
/* Reject down interfaces */
1194
1221
if(not (ifr.ifr_flags & IFF_UP)){
1195
1222
if(debug){
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1223
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
if_entry->d_name);
1198
1225
}
1199
1226
return 0;
1200
1227
}
1202
1229
/* Reject non-running interfaces */
1203
1230
if(not (ifr.ifr_flags & IFF_RUNNING)){
1204
1231
if(debug){
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1232
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if_entry->d_name);
1207
1234
}
1208
1235
return 0;
1209
1236
}
1228
1255
/* Is this directory entry a runnable program? */
1229
1256
int runnable_hook(const struct dirent *direntry){
1230
1257
int ret;
1258
size_t sret;
1231
1259
struct stat st;
1232
1260
1233
1261
if((direntry->d_name)[0] == '\0'){
1235
1263
return 0;
1236
1264
}
1237
1265
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);
1266
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1267
"abcdefghijklmnopqrstuvwxyz"
1268
"0123456789"
1269
"_-");
1270
if((direntry->d_name)[sret] != '\0'){
1271
/* Contains non-allowed characters */
1272
if(debug){
1273
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
direntry->d_name);
1275
}
1276
return 0;
1277
}
1278
1279
char *fullname = NULL;
1280
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1281
if(ret < 0){
1282
perror_plus("asprintf");
1283
return 0;
1284
}
1285
1286
ret = stat(fullname, &st);
1255
1287
if(ret == -1){
1256
1288
if(debug){
1257
perror_plus("Could not stat plugin");
1289
perror_plus("Could not stat hook");
1258
1290
}
1259
1291
return 0;
1260
1292
}
1261
1293
if(not (S_ISREG(st.st_mode))){
1262
1294
/* Not a regular file */
1295
if(debug){
1296
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1297
direntry->d_name);
1298
}
1263
1299
return 0;
1264
1300
}
1265
1301
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1266
1302
/* Not executable */
1303
if(debug){
1304
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
direntry->d_name);
1306
}
1267
1307
return 0;
1268
1308
}
1309
if(debug){
1310
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
direntry->d_name);
1312
}
1269
1313
return 1;
1270
1314
}
1271
1315
1278
1322
while(true){
1279
1323
if(mc.current_server == NULL){
1280
1324
if (debug){
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1325
fprintf_plus(stderr, "Wait until first server is found."
1326
" No timeout!\n");
1283
1327
}
1284
1328
ret = avahi_simple_poll_iterate(s, -1);
1285
1329
} else {
1286
1330
if (debug){
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1331
fprintf_plus(stderr, "Check current_server if we should run"
1332
" it, or wait\n");
1289
1333
}
1290
1334
/* the current time */
1291
1335
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1307
1351
- ((intmax_t)waited_time.tv_nsec / 1000000));
1308
1352
1309
1353
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1354
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1355
block_time);
1311
1356
}
1312
1357
1313
1358
if(block_time <= 0){
1333
1378
ret = avahi_simple_poll_iterate(s, (int)block_time);
1334
1379
}
1335
1380
if(ret != 0){
1336
if (ret > 0 or errno != EINTR) {
1381
if (ret > 0 or errno != EINTR){
1337
1382
return (ret != 1) ? ret : 0;
1338
1383
}
1339
1384
}
1340
1385
}
1341
1386
}
1342
1387
1388
bool run_network_hooks(const char *mode, const char *interface,
1389
const float delay){
1390
struct dirent **direntries;
1391
struct dirent *direntry;
1392
int ret;
1393
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1394
alphasort);
1395
if(numhooks == -1){
1396
perror_plus("scandir");
1397
} else {
1398
int devnull = open("/dev/null", O_RDONLY);
1399
for(int i = 0; i < numhooks; i++){
1400
direntry = direntries[i];
1401
char *fullname = NULL;
1402
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1403
if(ret < 0){
1404
perror_plus("asprintf");
1405
continue;
1406
}
1407
if(debug){
1408
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1409
direntry->d_name);
1410
}
1411
pid_t hook_pid = fork();
1412
if(hook_pid == 0){
1413
/* Child */
1414
/* Raise privileges */
1415
errno = 0;
1416
ret = seteuid(0);
1417
if(ret == -1){
1418
perror_plus("seteuid");
1419
}
1420
/* Raise privileges even more */
1421
errno = 0;
1422
ret = setuid(0);
1423
if(ret == -1){
1424
perror_plus("setuid");
1425
}
1426
/* Set group */
1427
errno = 0;
1428
ret = setgid(0);
1429
if(ret == -1){
1430
perror_plus("setgid");
1431
}
1432
/* Reset supplementary groups */
1433
errno = 0;
1434
ret = setgroups(0, NULL);
1435
if(ret == -1){
1436
perror_plus("setgroups");
1437
}
1438
dup2(devnull, STDIN_FILENO);
1439
close(devnull);
1440
dup2(STDERR_FILENO, STDOUT_FILENO);
1441
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1442
if(ret == -1){
1443
perror_plus("setenv");
1444
_exit(EX_OSERR);
1445
}
1446
ret = setenv("DEVICE", interface, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("MODE", mode, 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
char *delaystring;
1462
ret = asprintf(&delaystring, "%f", delay);
1463
if(ret == -1){
1464
perror_plus("asprintf");
1465
_exit(EX_OSERR);
1466
}
1467
ret = setenv("DELAY", delaystring, 1);
1468
if(ret == -1){
1469
free(delaystring);
1470
perror_plus("setenv");
1471
_exit(EX_OSERR);
1472
}
1473
free(delaystring);
1474
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1475
perror_plus("execl");
1476
_exit(EXIT_FAILURE);
1477
}
1478
} else {
1479
int status;
1480
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1481
perror_plus("waitpid");
1482
free(fullname);
1483
continue;
1484
}
1485
if(WIFEXITED(status)){
1486
if(WEXITSTATUS(status) != 0){
1487
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1488
" with status %d\n", direntry->d_name,
1489
WEXITSTATUS(status));
1490
free(fullname);
1491
continue;
1492
}
1493
} else if(WIFSIGNALED(status)){
1494
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1495
" signal %d\n", direntry->d_name,
1496
WTERMSIG(status));
1497
free(fullname);
1498
continue;
1499
} else {
1500
fprintf_plus(stderr, "Warning: network hook \"%s\""
1501
" crashed\n", direntry->d_name);
1502
free(fullname);
1503
continue;
1504
}
1505
}
1506
free(fullname);
1507
if(debug){
1508
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1509
direntry->d_name);
1510
}
1511
}
1512
close(devnull);
1513
}
1514
return true;
1515
}
1516
1343
1517
int main(int argc, char *argv[]){
1344
1518
AvahiSServiceBrowser *sb = NULL;
1345
1519
int error;
1427
1601
.arg = "SECONDS",
1428
1602
.doc = "Retry interval used when denied by the mandos server",
1429
1603
.group = 2 },
1604
{ .name = "network-hook-dir", .key = 133,
1605
.arg = "DIR",
1606
.doc = "Directory where network hooks are located",
1607
.group = 2 },
1430
1608
/*
1431
1609
* These reproduce what we would get without ARGP_NO_HELP
1432
1610
*/
1485
1663
argp_error(state, "Bad retry interval");
1486
1664
}
1487
1665
break;
1666
case 133: /* --network-hook-dir */
1667
hookdir = arg;
1668
break;
1488
1669
/*
1489
1670
* These reproduce what we would get without ARGP_NO_HELP
1490
1671
*/
1496
1677
argp_state_help(state, state->out_stream,
1497
1678
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1498
1679
case 'V': /* --version */
1499
fprintf(state->out_stream, "%s\n", argp_program_version);
1680
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1500
1681
exit(argp_err_exit_status);
1501
1682
break;
1502
1683
default:
1529
1710
{
1530
1711
/* Work around Debian bug #633582:
1531
1712
<http://bugs.debian.org/633582> */
1532
struct stat st;
1533
1713
1534
1714
/* Re-raise priviliges */
1535
1715
errno = 0;
1536
1716
ret = seteuid(0);
1537
1717
if(ret == -1){
1538
1718
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");
1719
} else {
1720
struct stat st;
1721
1722
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1723
int seckey_fd = open(seckey, O_RDONLY);
1724
if(seckey_fd == -1){
1725
perror_plus("open");
1726
} else {
1727
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1728
if(ret == -1){
1729
perror_plus("fstat");
1730
} else {
1731
if(S_ISREG(st.st_mode)
1732
and st.st_uid == 0 and st.st_gid == 0){
1733
ret = fchown(seckey_fd, uid, gid);
1734
if(ret == -1){
1735
perror_plus("fchown");
1736
}
1737
}
1738
}
1739
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
}
1741
}
1742
1743
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1744
int pubkey_fd = open(pubkey, O_RDONLY);
1745
if(pubkey_fd == -1){
1746
perror_plus("open");
1747
} else {
1748
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1749
if(ret == -1){
1750
perror_plus("fstat");
1751
} else {
1752
if(S_ISREG(st.st_mode)
1753
and st.st_uid == 0 and st.st_gid == 0){
1754
ret = fchown(pubkey_fd, uid, gid);
1755
if(ret == -1){
1756
perror_plus("fchown");
1757
}
1758
}
1759
}
1760
TEMP_FAILURE_RETRY(close(pubkey_fd));
1761
}
1762
}
1763
1764
/* Lower privileges */
1765
errno = 0;
1766
ret = seteuid(uid);
1767
if(ret == -1){
1768
perror_plus("seteuid");
1769
}
1586
1770
}
1587
1771
}
1588
1772
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
setenv("DEVICE", interface, 1);
1612
setenv("VERBOSE", debug ? "1" : "0", 1);
1613
setenv("MODE", "start", 1);
1614
/* setenv( XXX more here */
1615
ret = execl(fullname, direntry->d_name, "start", NULL);
1616
perror_plus("execl");
1617
}
1618
free(fullname);
1619
if(quit_now){
1620
goto end;
1621
}
1622
}
1623
close(devnull);
1773
/* Run network hooks */
1774
if(not run_network_hooks("start", interface, delay)){
1775
goto end;
1624
1776
}
1625
1777
1626
1778
if(not debug){
1642
1794
/* Pick the first interface returned */
1643
1795
interface = strdup(direntries[0]->d_name);
1644
1796
if(debug){
1645
fprintf(stderr, "Using interface \"%s\"\n", interface);
1797
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1646
1798
}
1647
1799
if(interface == NULL){
1648
1800
perror_plus("malloc");
1653
1805
free(direntries);
1654
1806
} else {
1655
1807
free(direntries);
1656
fprintf(stderr, "Could not find a network interface\n");
1808
fprintf_plus(stderr, "Could not find a network interface\n");
1657
1809
exitcode = EXIT_FAILURE;
1658
1810
goto end;
1659
1811
}
1665
1817
srand((unsigned int) time(NULL));
1666
1818
mc.simple_poll = avahi_simple_poll_new();
1667
1819
if(mc.simple_poll == NULL){
1668
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1820
fprintf_plus(stderr,
1821
"Avahi: Failed to create simple poll object.\n");
1669
1822
exitcode = EX_UNAVAILABLE;
1670
1823
goto end;
1671
1824
}
1737
1890
if(strcmp(interface, "none") != 0){
1738
1891
if_index = (AvahiIfIndex) if_nametoindex(interface);
1739
1892
if(if_index == 0){
1740
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1893
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1741
1894
exitcode = EX_UNAVAILABLE;
1742
1895
goto end;
1743
1896
}
1863
2016
#endif /* __linux__ */
1864
2017
/* Lower privileges */
1865
2018
errno = 0;
1866
if(take_down_interface){
1867
/* Lower privileges */
1868
ret = seteuid(uid);
1869
if(ret == -1){
1870
perror_plus("seteuid");
1871
}
1872
} else {
1873
/* Lower privileges permanently */
1874
ret = setuid(uid);
1875
if(ret == -1){
1876
perror_plus("setuid");
1877
}
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
1878
2023
}
1879
2024
}
1880
2025
1884
2029
1885
2030
ret = init_gnutls_global(pubkey, seckey);
1886
2031
if(ret == -1){
1887
fprintf(stderr, "init_gnutls_global failed\n");
2032
fprintf_plus(stderr, "init_gnutls_global failed\n");
1888
2033
exitcode = EX_UNAVAILABLE;
1889
2034
goto end;
1890
2035
} else {
1906
2051
}
1907
2052
1908
2053
if(not init_gpgme(pubkey, seckey, tempdir)){
1909
fprintf(stderr, "init_gpgme failed\n");
2054
fprintf_plus(stderr, "init_gpgme failed\n");
1910
2055
exitcode = EX_UNAVAILABLE;
1911
2056
goto end;
1912
2057
} else {
1922
2067
/* (Mainly meant for debugging) */
1923
2068
char *address = strrchr(connect_to, ':');
1924
2069
if(address == NULL){
1925
fprintf(stderr, "No colon in address\n");
2070
fprintf_plus(stderr, "No colon in address\n");
1926
2071
exitcode = EX_USAGE;
1927
2072
goto end;
1928
2073
}
1936
2081
tmpmax = strtoimax(address+1, &tmp, 10);
1937
2082
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1938
2083
or tmpmax != (uint16_t)tmpmax){
1939
fprintf(stderr, "Bad port number\n");
2084
fprintf_plus(stderr, "Bad port number\n");
1940
2085
exitcode = EX_USAGE;
1941
2086
goto end;
1942
2087
}
1972
2117
break;
1973
2118
}
1974
2119
if(debug){
1975
fprintf(stderr, "Retrying in %d seconds\n",
1976
(int)retry_interval);
2120
fprintf_plus(stderr, "Retrying in %d seconds\n",
2121
(int)retry_interval);
1977
2122
}
1978
2123
sleep((int)retry_interval);
1979
2124
}
2009
2154
2010
2155
/* Check if creating the Avahi server object succeeded */
2011
2156
if(mc.server == NULL){
2012
fprintf(stderr, "Failed to create Avahi server: %s\n",
2013
avahi_strerror(error));
2157
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2158
avahi_strerror(error));
2014
2159
exitcode = EX_UNAVAILABLE;
2015
2160
goto end;
2016
2161
}
2024
2169
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2025
2170
NULL, 0, browse_callback, NULL);
2026
2171
if(sb == NULL){
2027
fprintf(stderr, "Failed to create service browser: %s\n",
2028
avahi_strerror(avahi_server_errno(mc.server)));
2172
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2029
2174
exitcode = EX_UNAVAILABLE;
2030
2175
goto end;
2031
2176
}
2037
2182
/* Run the main loop */
2038
2183
2039
2184
if(debug){
2040
fprintf(stderr, "Starting Avahi loop search\n");
2185
fprintf_plus(stderr, "Starting Avahi loop search\n");
2041
2186
}
2042
2187
2043
2188
ret = avahi_loop_with_timeout(mc.simple_poll,
2044
2189
(int)(retry_interval * 1000));
2045
2190
if(debug){
2046
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2047
(ret == 0) ? "successfully" : "with error");
2191
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2192
(ret == 0) ? "successfully" : "with error");
2048
2193
}
2049
2194
2050
2195
end:
2051
2196
2052
2197
if(debug){
2053
fprintf(stderr, "%s exiting\n", argv[0]);
2198
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2054
2199
}
2055
2200
2056
2201
/* Cleanup things */
2072
2217
if(gpgme_initialized){
2073
2218
gpgme_release(mc.ctx);
2074
2219
}
2075
2220
2076
2221
/* Cleans up the circular linked list of Mandos servers the client
2077
2222
has seen */
2078
2223
if(mc.current_server != NULL){
2084
2229
}
2085
2230
}
2086
2231
2087
/* XXX run network hooks "stop" here */
2232
/* Run network hooks */
2233
run_network_hooks("stop", interface, delay);
2088
2234
2089
/* Take down the network interface */
2090
if(take_down_interface){
2091
/* Re-raise priviliges */
2235
/* Re-raise priviliges */
2236
{
2092
2237
errno = 0;
2093
2238
ret = seteuid(0);
2094
2239
if(ret == -1){
2095
2240
perror_plus("seteuid");
2096
2241
}
2097
if(geteuid() == 0){
2242
2243
/* Take down the network interface */
2244
if(take_down_interface and geteuid() == 0){
2098
2245
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2099
2246
if(ret == -1){
2100
2247
perror_plus("ioctl SIOCGIFFLAGS");
2101
} else if(network.ifr_flags & IFF_UP) {
2248
} else if(network.ifr_flags & IFF_UP){
2102
2249
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2103
2250
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2104
2251
if(ret == -1){
2109
2256
if(ret == -1){
2110
2257
perror_plus("close");
2111
2258
}
2112
/* Lower privileges permanently */
2113
errno = 0;
2114
ret = setuid(uid);
2115
if(ret == -1){
2116
perror_plus("setuid");
2117
}
2118
2259
}
2119
2260
}
2261
/* Lower privileges permanently */
2262
errno = 0;
2263
ret = setuid(uid);
2264
if(ret == -1){
2265
perror_plus("setuid");
2266
}
2120
2267
2121
2268
/* Removes the GPGME temp directory and all files inside */
2122
2269
if(tempdir_created){
2136
2283
}
2137
2284
ret = remove(fullname);
2138
2285
if(ret == -1){
2139
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2140
strerror(errno));
2286
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2287
strerror(errno));
2141
2288
}
2142
2289
free(fullname);
2143
2290
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0