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237.7.92
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2011-12-31 23:05:34 UTC
- mto: (237.7.109 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@recompile.se-20111231230534-o5w0uhwx30gwhmk7
Updated year in copyright notices.
- files added:
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
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{
166
170
167
171
/* Function to use when printing errors */
168
172
void perror_plus(const char *print_text){
173
int e = errno;
169
174
fprintf(stderr, "Mandos plugin %s: ",
170
175
program_invocation_short_name);
176
errno = e;
171
177
perror(print_text);
172
178
}
173
179
180
__attribute__((format (gnu_printf, 2, 3)))
181
int fprintf_plus(FILE *stream, const char *format, ...){
182
va_list ap;
183
va_start (ap, format);
184
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
}
189
174
190
/*
175
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
192
* bytes. "buffer_capacity" is how much is currently allocated,
177
193
* "buffer_length" is how much is already used.
178
194
*/
179
195
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
196
size_t buffer_capacity){
181
197
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
199
if(buffer == NULL){
189
205
}
190
206
191
207
/* 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){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
195
210
int ret;
196
211
server *new_server = malloc(sizeof(server));
197
212
if(new_server == NULL){
198
213
perror_plus("malloc");
199
return -1;
214
return false;
200
215
}
201
216
*new_server = (server){ .ip = strdup(ip),
202
.port = port,
203
.if_index = if_index,
204
.af = af };
217
.port = port,
218
.if_index = if_index,
219
.af = af };
205
220
if(new_server->ip == NULL){
206
221
perror_plus("strdup");
207
return -1;
222
return false;
208
223
}
209
224
/* Special case of first server */
210
225
if (mc.current_server == NULL){
221
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
237
if(ret == -1){
223
238
perror_plus("clock_gettime");
224
return -1;
239
return false;
225
240
}
226
return 0;
241
return true;
227
242
}
228
243
229
244
/*
230
245
* Initialize GPGME.
231
246
*/
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
234
249
gpgme_error_t rc;
235
250
gpgme_engine_info_t engine_info;
236
251
251
266
252
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
268
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));
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
256
271
return false;
257
272
}
258
273
259
274
rc = gpgme_op_import(mc.ctx, pgp_data);
260
275
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
263
278
return false;
264
279
}
265
280
272
287
}
273
288
274
289
if(debug){
275
fprintf(stderr, "Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
276
291
}
277
292
278
293
/* Init GPGME */
279
294
gpgme_check_version(NULL);
280
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
296
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
284
299
return false;
285
300
}
286
301
287
302
/* Set GPGME home directory for the OpenPGP engine only */
288
303
rc = gpgme_get_engine_info(&engine_info);
289
304
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
292
307
return false;
293
308
}
294
309
while(engine_info != NULL){
300
315
engine_info = engine_info->next;
301
316
}
302
317
if(engine_info == NULL){
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
304
320
return false;
305
321
}
306
322
307
323
/* Create new GPGME "context" */
308
324
rc = gpgme_new(&(mc.ctx));
309
325
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
312
329
return false;
313
330
}
314
331
333
350
ssize_t plaintext_length = 0;
334
351
335
352
if(debug){
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
337
354
}
338
355
339
356
/* Create new GPGME data buffer from memory cryptotext */
340
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
341
358
0);
342
359
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));
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
345
362
return -1;
346
363
}
347
364
348
365
/* Create new empty GPGME data buffer for the plaintext */
349
366
rc = gpgme_data_new(&dh_plain);
350
367
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
353
371
gpgme_data_release(dh_crypto);
354
372
return -1;
355
373
}
358
376
data buffer */
359
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
378
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
363
381
plaintext_length = -1;
364
382
if(debug){
365
383
gpgme_decrypt_result_t result;
366
384
result = gpgme_op_decrypt_result(mc.ctx);
367
385
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
369
387
} 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);
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
374
392
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
376
394
}
377
395
gpgme_recipient_t recipient;
378
396
recipient = result->recipients;
379
397
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");
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
404
? "No" : "Yes");
386
405
recipient = recipient->next;
387
406
}
388
407
}
391
410
}
392
411
393
412
if(debug){
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
395
414
}
396
415
397
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
404
423
*plaintext = NULL;
405
424
while(true){
406
425
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
408
plaintext_capacity);
426
(size_t)plaintext_length,
427
plaintext_capacity);
409
428
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
429
perror_plus("incbuffer");
430
plaintext_length = -1;
431
goto decrypt_end;
413
432
}
414
433
415
434
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
428
447
}
429
448
430
449
if(debug){
431
fprintf(stderr, "Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
432
451
for(ssize_t i = 0; i < plaintext_length; i++){
433
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
434
453
}
456
475
/* GnuTLS log function callback */
457
476
static void debuggnutls(__attribute__((unused)) int level,
458
477
const char* string){
459
fprintf(stderr, "GnuTLS: %s", string);
478
fprintf_plus(stderr, "GnuTLS: %s", string);
460
479
}
461
480
462
481
static int init_gnutls_global(const char *pubkeyfilename,
464
483
int ret;
465
484
466
485
if(debug){
467
fprintf(stderr, "Initializing GnuTLS\n");
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
468
487
}
469
488
470
489
ret = gnutls_global_init();
471
490
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
474
493
return -1;
475
494
}
476
495
485
504
/* OpenPGP credentials */
486
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
506
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
490
509
gnutls_global_deinit();
491
510
return -1;
492
511
}
493
512
494
513
if(debug){
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
seckeyfilename);
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
498
518
}
499
519
500
520
ret = gnutls_certificate_set_openpgp_key_file
501
521
(mc.cred, pubkeyfilename, seckeyfilename,
502
522
GNUTLS_OPENPGP_FMT_BASE64);
503
523
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));
524
fprintf_plus(stderr,
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
509
529
goto globalfail;
510
530
}
511
531
512
532
/* GnuTLS server initialization */
513
533
ret = gnutls_dh_params_init(&mc.dh_params);
514
534
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
517
538
goto globalfail;
518
539
}
519
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
541
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
523
544
goto globalfail;
524
545
}
525
546
545
566
}
546
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
547
568
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
550
572
}
551
573
552
574
{
559
581
}
560
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
583
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));
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
565
587
gnutls_deinit(*session);
566
588
return -1;
567
589
}
576
598
}
577
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
578
600
if(ret != GNUTLS_E_SUCCESS){
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
581
603
gnutls_deinit(*session);
582
604
return -1;
583
605
}
628
650
pf = PF_INET;
629
651
break;
630
652
default:
631
fprintf(stderr, "Bad address family: %d\n", af);
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
632
654
errno = EINVAL;
633
655
return -1;
634
656
}
639
661
}
640
662
641
663
if(debug){
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
644
666
}
645
667
646
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
672
694
}
673
695
if(ret == 0){
674
696
int e = errno;
675
fprintf(stderr, "Bad address: %s\n", ip);
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
676
698
errno = e;
677
699
goto mandos_end;
678
700
}
683
705
684
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
686
-Wunreachable-code*/
708
-Wunreachable-code*/
687
709
if(if_index == AVAHI_IF_UNSPEC){
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
690
712
errno = EINVAL;
691
713
goto mandos_end;
692
714
}
710
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
733
perror_plus("if_indextoname");
712
734
} else {
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
715
737
}
716
738
} else {
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
719
741
}
720
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
731
753
perror_plus("inet_ntop");
732
754
} else {
733
755
if(strcmp(addrstr, ip) != 0){
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
735
757
}
736
758
}
737
759
}
765
787
while(true){
766
788
size_t out_size = strlen(out);
767
789
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
768
out_size - written));
790
out_size - written));
769
791
if(ret == -1){
770
792
int e = errno;
771
793
perror_plus("write");
791
813
}
792
814
793
815
if(debug){
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
795
817
}
796
818
797
819
if(quit_now){
817
839
818
840
if(ret != GNUTLS_E_SUCCESS){
819
841
if(debug){
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
821
843
gnutls_perror(ret);
822
844
}
823
845
errno = EPROTO;
827
849
/* Read OpenPGP packet that contains the wanted password */
828
850
829
851
if(debug){
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
832
854
}
833
855
834
856
while(true){
839
861
}
840
862
841
863
buffer_capacity = incbuffer(&buffer, buffer_length,
842
buffer_capacity);
864
buffer_capacity);
843
865
if(buffer_capacity == 0){
844
866
int e = errno;
845
867
perror_plus("incbuffer");
872
894
}
873
895
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
874
896
if(ret < 0){
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
876
899
gnutls_perror(ret);
877
900
errno = EPROTO;
878
901
goto mandos_end;
879
902
}
880
903
break;
881
904
default:
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
884
907
gnutls_bye(session, GNUTLS_SHUT_RDWR);
885
908
errno = EIO;
886
909
goto mandos_end;
891
914
}
892
915
893
916
if(debug){
894
fprintf(stderr, "Closing TLS session\n");
917
fprintf_plus(stderr, "Closing TLS session\n");
895
918
}
896
919
897
920
if(quit_now){
909
932
910
933
if(buffer_length > 0){
911
934
ssize_t decrypted_buffer_size;
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
914
936
&decrypted_buffer);
915
937
if(decrypted_buffer_size >= 0){
916
938
927
949
if(ret == 0 and ferror(stdout)){
928
950
int e = errno;
929
951
if(debug){
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
932
954
}
933
955
errno = e;
934
956
goto mandos_end;
991
1013
switch(event){
992
1014
default:
993
1015
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)));
1016
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1017
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1018
domain,
1019
avahi_strerror(avahi_server_errno(mc.server)));
997
1020
break;
998
1021
999
1022
case AVAHI_RESOLVER_FOUND:
1001
1024
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1025
avahi_address_snprint(ip, sizeof(ip), address);
1003
1026
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);
1027
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1028
PRIdMAX ") on port %" PRIu16 "\n", name,
1029
host_name, ip, (intmax_t)interface, port);
1007
1030
}
1008
1031
int ret = start_mandos_communication(ip, port, interface,
1009
1032
avahi_proto_to_af(proto));
1010
1033
if(ret == 0){
1011
1034
avahi_simple_poll_quit(mc.simple_poll);
1012
1035
} else {
1013
ret = add_server(ip, port, interface,
1014
avahi_proto_to_af(proto));
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1039
" list\n", name);
1040
}
1015
1041
}
1016
1042
}
1017
1043
}
1041
1067
default:
1042
1068
case AVAHI_BROWSER_FAILURE:
1043
1069
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
avahi_strerror(avahi_server_errno(mc.server)));
1046
1072
avahi_simple_poll_quit(mc.simple_poll);
1047
1073
return;
1048
1074
1055
1081
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1082
name, type, domain, protocol, 0,
1057
1083
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1085
" %s\n", name,
1086
avahi_strerror(avahi_server_errno(mc.server)));
1060
1087
break;
1061
1088
1062
1089
case AVAHI_BROWSER_REMOVE:
1065
1092
case AVAHI_BROWSER_ALL_FOR_NOW:
1066
1093
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1067
1094
if(debug){
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1069
1097
}
1070
1098
break;
1071
1099
}
1110
1138
/* Reject the loopback device */
1111
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1112
1140
if(debug){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1115
1143
}
1116
1144
return false;
1117
1145
}
1118
1146
/* Accept point-to-point devices only if connect_to is specified */
1119
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1120
1148
if(debug){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1123
1151
}
1124
1152
return true;
1125
1153
}
1126
1154
/* Otherwise, reject non-broadcast-capable devices */
1127
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1128
1156
if(debug){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1131
1159
}
1132
1160
return false;
1133
1161
}
1134
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1163
if(ifr->ifr_flags & IFF_NOARP){
1136
1164
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1138
1167
}
1139
1168
return false;
1140
1169
}
1141
1170
1142
1171
/* Accept this device */
1143
1172
if(debug){
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1145
1174
}
1146
1175
return true;
1147
1176
}
1159
1188
struct ifreq ifr;
1160
1189
if(not get_flags(if_entry->d_name, &ifr)){
1161
1190
if(debug){
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1164
1193
}
1165
1194
return 0;
1166
1195
}
1184
1213
struct ifreq ifr;
1185
1214
if(not get_flags(if_entry->d_name, &ifr)){
1186
1215
if(debug){
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1189
1218
}
1190
1219
return 0;
1191
1220
}
1193
1222
/* Reject down interfaces */
1194
1223
if(not (ifr.ifr_flags & IFF_UP)){
1195
1224
if(debug){
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1198
1227
}
1199
1228
return 0;
1200
1229
}
1202
1231
/* Reject non-running interfaces */
1203
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1204
1233
if(debug){
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1207
1236
}
1208
1237
return 0;
1209
1238
}
1228
1257
/* Is this directory entry a runnable program? */
1229
1258
int runnable_hook(const struct dirent *direntry){
1230
1259
int ret;
1260
size_t sret;
1231
1261
struct stat st;
1232
1262
1233
1263
if((direntry->d_name)[0] == '\0'){
1235
1265
return 0;
1236
1266
}
1237
1267
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);
1268
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1269
"abcdefghijklmnopqrstuvwxyz"
1270
"0123456789"
1271
"_-");
1272
if((direntry->d_name)[sret] != '\0'){
1273
/* Contains non-allowed characters */
1274
if(debug){
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1276
direntry->d_name);
1277
}
1278
return 0;
1279
}
1280
1281
char *fullname = NULL;
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1283
if(ret < 0){
1284
perror_plus("asprintf");
1285
return 0;
1286
}
1287
1288
ret = stat(fullname, &st);
1255
1289
if(ret == -1){
1256
1290
if(debug){
1257
perror_plus("Could not stat plugin");
1291
perror_plus("Could not stat hook");
1258
1292
}
1259
1293
return 0;
1260
1294
}
1261
1295
if(not (S_ISREG(st.st_mode))){
1262
1296
/* Not a regular file */
1297
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1300
}
1263
1301
return 0;
1264
1302
}
1265
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1266
1304
/* Not executable */
1305
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1308
}
1267
1309
return 0;
1268
1310
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1269
1315
return 1;
1270
1316
}
1271
1317
1278
1324
while(true){
1279
1325
if(mc.current_server == NULL){
1280
1326
if (debug){
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1283
1329
}
1284
1330
ret = avahi_simple_poll_iterate(s, -1);
1285
1331
} else {
1286
1332
if (debug){
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1289
1335
}
1290
1336
/* the current time */
1291
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1307
1353
- ((intmax_t)waited_time.tv_nsec / 1000000));
1308
1354
1309
1355
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1311
1358
}
1312
1359
1313
1360
if(block_time <= 0){
1333
1380
ret = avahi_simple_poll_iterate(s, (int)block_time);
1334
1381
}
1335
1382
if(ret != 0){
1336
if (ret > 0 or errno != EINTR) {
1383
if (ret > 0 or errno != EINTR){
1337
1384
return (ret != 1) ? ret : 0;
1338
1385
}
1339
1386
}
1340
1387
}
1341
1388
}
1342
1389
1390
bool run_network_hooks(const char *mode, const char *interface,
1391
const float delay){
1392
struct dirent **direntries;
1393
struct dirent *direntry;
1394
int ret;
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1396
alphasort);
1397
if(numhooks == -1){
1398
perror_plus("scandir");
1399
} else {
1400
int devnull = open("/dev/null", O_RDONLY);
1401
for(int i = 0; i < numhooks; i++){
1402
direntry = direntries[i];
1403
char *fullname = NULL;
1404
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1405
if(ret < 0){
1406
perror_plus("asprintf");
1407
continue;
1408
}
1409
if(debug){
1410
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1411
direntry->d_name);
1412
}
1413
pid_t hook_pid = fork();
1414
if(hook_pid == 0){
1415
/* Child */
1416
/* Raise privileges */
1417
errno = 0;
1418
ret = seteuid(0);
1419
if(ret == -1){
1420
perror_plus("seteuid");
1421
}
1422
/* Raise privileges even more */
1423
errno = 0;
1424
ret = setuid(0);
1425
if(ret == -1){
1426
perror_plus("setuid");
1427
}
1428
/* Set group */
1429
errno = 0;
1430
ret = setgid(0);
1431
if(ret == -1){
1432
perror_plus("setgid");
1433
}
1434
/* Reset supplementary groups */
1435
errno = 0;
1436
ret = setgroups(0, NULL);
1437
if(ret == -1){
1438
perror_plus("setgroups");
1439
}
1440
dup2(devnull, STDIN_FILENO);
1441
close(devnull);
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1443
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
_exit(EX_OSERR);
1447
}
1448
ret = setenv("DEVICE", interface, 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
_exit(EX_OSERR);
1452
}
1453
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
_exit(EX_OSERR);
1457
}
1458
ret = setenv("MODE", mode, 1);
1459
if(ret == -1){
1460
perror_plus("setenv");
1461
_exit(EX_OSERR);
1462
}
1463
char *delaystring;
1464
ret = asprintf(&delaystring, "%f", delay);
1465
if(ret == -1){
1466
perror_plus("asprintf");
1467
_exit(EX_OSERR);
1468
}
1469
ret = setenv("DELAY", delaystring, 1);
1470
if(ret == -1){
1471
free(delaystring);
1472
perror_plus("setenv");
1473
_exit(EX_OSERR);
1474
}
1475
free(delaystring);
1476
if(connect_to != NULL){
1477
ret = setenv("CONNECT", connect_to, 1);
1478
if(ret == -1){
1479
perror_plus("setenv");
1480
_exit(EX_OSERR);
1481
}
1482
}
1483
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1484
perror_plus("execl");
1485
_exit(EXIT_FAILURE);
1486
}
1487
} else {
1488
int status;
1489
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1490
perror_plus("waitpid");
1491
free(fullname);
1492
continue;
1493
}
1494
if(WIFEXITED(status)){
1495
if(WEXITSTATUS(status) != 0){
1496
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1497
" with status %d\n", direntry->d_name,
1498
WEXITSTATUS(status));
1499
free(fullname);
1500
continue;
1501
}
1502
} else if(WIFSIGNALED(status)){
1503
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1504
" signal %d\n", direntry->d_name,
1505
WTERMSIG(status));
1506
free(fullname);
1507
continue;
1508
} else {
1509
fprintf_plus(stderr, "Warning: network hook \"%s\""
1510
" crashed\n", direntry->d_name);
1511
free(fullname);
1512
continue;
1513
}
1514
}
1515
free(fullname);
1516
if(debug){
1517
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1518
direntry->d_name);
1519
}
1520
}
1521
close(devnull);
1522
}
1523
return true;
1524
}
1525
1343
1526
int main(int argc, char *argv[]){
1344
1527
AvahiSServiceBrowser *sb = NULL;
1345
1528
int error;
1425
1608
.group = 2 },
1426
1609
{ .name = "retry", .key = 132,
1427
1610
.arg = "SECONDS",
1428
.doc = "Retry interval used when denied by the mandos server",
1611
.doc = "Retry interval used when denied by the Mandos server",
1612
.group = 2 },
1613
{ .name = "network-hook-dir", .key = 133,
1614
.arg = "DIR",
1615
.doc = "Directory where network hooks are located",
1429
1616
.group = 2 },
1430
1617
/*
1431
1618
* These reproduce what we would get without ARGP_NO_HELP
1485
1672
argp_error(state, "Bad retry interval");
1486
1673
}
1487
1674
break;
1675
case 133: /* --network-hook-dir */
1676
hookdir = arg;
1677
break;
1488
1678
/*
1489
1679
* These reproduce what we would get without ARGP_NO_HELP
1490
1680
*/
1496
1686
argp_state_help(state, state->out_stream,
1497
1687
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1498
1688
case 'V': /* --version */
1499
fprintf(state->out_stream, "%s\n", argp_program_version);
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1500
1690
exit(argp_err_exit_status);
1501
1691
break;
1502
1692
default:
1529
1719
{
1530
1720
/* Work around Debian bug #633582:
1531
1721
<http://bugs.debian.org/633582> */
1532
struct stat st;
1533
1722
1534
1723
/* Re-raise priviliges */
1535
1724
errno = 0;
1536
1725
ret = seteuid(0);
1537
1726
if(ret == -1){
1538
1727
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");
1728
} else {
1729
struct stat st;
1730
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1732
int seckey_fd = open(seckey, O_RDONLY);
1733
if(seckey_fd == -1){
1734
perror_plus("open");
1735
} else {
1736
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1737
if(ret == -1){
1738
perror_plus("fstat");
1739
} else {
1740
if(S_ISREG(st.st_mode)
1741
and st.st_uid == 0 and st.st_gid == 0){
1742
ret = fchown(seckey_fd, uid, gid);
1743
if(ret == -1){
1744
perror_plus("fchown");
1745
}
1746
}
1747
}
1748
TEMP_FAILURE_RETRY(close(seckey_fd));
1749
}
1750
}
1751
1752
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1753
int pubkey_fd = open(pubkey, O_RDONLY);
1754
if(pubkey_fd == -1){
1755
perror_plus("open");
1756
} else {
1757
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1758
if(ret == -1){
1759
perror_plus("fstat");
1760
} else {
1761
if(S_ISREG(st.st_mode)
1762
and st.st_uid == 0 and st.st_gid == 0){
1763
ret = fchown(pubkey_fd, uid, gid);
1764
if(ret == -1){
1765
perror_plus("fchown");
1766
}
1767
}
1768
}
1769
TEMP_FAILURE_RETRY(close(pubkey_fd));
1770
}
1771
}
1772
1773
/* Lower privileges */
1774
errno = 0;
1775
ret = seteuid(uid);
1776
if(ret == -1){
1777
perror_plus("seteuid");
1778
}
1586
1779
}
1587
1780
}
1588
1781
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);
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1648
1785
}
1649
1786
1650
1787
if(not debug){
1666
1803
/* Pick the first interface returned */
1667
1804
interface = strdup(direntries[0]->d_name);
1668
1805
if(debug){
1669
fprintf(stderr, "Using interface \"%s\"\n", interface);
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1670
1807
}
1671
1808
if(interface == NULL){
1672
1809
perror_plus("malloc");
1677
1814
free(direntries);
1678
1815
} else {
1679
1816
free(direntries);
1680
fprintf(stderr, "Could not find a network interface\n");
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1681
1818
exitcode = EXIT_FAILURE;
1682
1819
goto end;
1683
1820
}
1689
1826
srand((unsigned int) time(NULL));
1690
1827
mc.simple_poll = avahi_simple_poll_new();
1691
1828
if(mc.simple_poll == NULL){
1692
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1693
1831
exitcode = EX_UNAVAILABLE;
1694
1832
goto end;
1695
1833
}
1761
1899
if(strcmp(interface, "none") != 0){
1762
1900
if_index = (AvahiIfIndex) if_nametoindex(interface);
1763
1901
if(if_index == 0){
1764
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1765
1903
exitcode = EX_UNAVAILABLE;
1766
1904
goto end;
1767
1905
}
1887
2025
#endif /* __linux__ */
1888
2026
/* Lower privileges */
1889
2027
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
}
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
1902
2032
}
1903
2033
}
1904
2034
1908
2038
1909
2039
ret = init_gnutls_global(pubkey, seckey);
1910
2040
if(ret == -1){
1911
fprintf(stderr, "init_gnutls_global failed\n");
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
1912
2042
exitcode = EX_UNAVAILABLE;
1913
2043
goto end;
1914
2044
} else {
1930
2060
}
1931
2061
1932
2062
if(not init_gpgme(pubkey, seckey, tempdir)){
1933
fprintf(stderr, "init_gpgme failed\n");
2063
fprintf_plus(stderr, "init_gpgme failed\n");
1934
2064
exitcode = EX_UNAVAILABLE;
1935
2065
goto end;
1936
2066
} else {
1946
2076
/* (Mainly meant for debugging) */
1947
2077
char *address = strrchr(connect_to, ':');
1948
2078
if(address == NULL){
1949
fprintf(stderr, "No colon in address\n");
2079
fprintf_plus(stderr, "No colon in address\n");
1950
2080
exitcode = EX_USAGE;
1951
2081
goto end;
1952
2082
}
1960
2090
tmpmax = strtoimax(address+1, &tmp, 10);
1961
2091
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1962
2092
or tmpmax != (uint16_t)tmpmax){
1963
fprintf(stderr, "Bad port number\n");
2093
fprintf_plus(stderr, "Bad port number\n");
1964
2094
exitcode = EX_USAGE;
1965
2095
goto end;
1966
2096
}
1996
2126
break;
1997
2127
}
1998
2128
if(debug){
1999
fprintf(stderr, "Retrying in %d seconds\n",
2000
(int)retry_interval);
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2001
2131
}
2002
2132
sleep((int)retry_interval);
2003
2133
}
2033
2163
2034
2164
/* Check if creating the Avahi server object succeeded */
2035
2165
if(mc.server == NULL){
2036
fprintf(stderr, "Failed to create Avahi server: %s\n",
2037
avahi_strerror(error));
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
2038
2168
exitcode = EX_UNAVAILABLE;
2039
2169
goto end;
2040
2170
}
2048
2178
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2049
2179
NULL, 0, browse_callback, NULL);
2050
2180
if(sb == NULL){
2051
fprintf(stderr, "Failed to create service browser: %s\n",
2052
avahi_strerror(avahi_server_errno(mc.server)));
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2182
avahi_strerror(avahi_server_errno(mc.server)));
2053
2183
exitcode = EX_UNAVAILABLE;
2054
2184
goto end;
2055
2185
}
2061
2191
/* Run the main loop */
2062
2192
2063
2193
if(debug){
2064
fprintf(stderr, "Starting Avahi loop search\n");
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2065
2195
}
2066
2196
2067
2197
ret = avahi_loop_with_timeout(mc.simple_poll,
2068
2198
(int)(retry_interval * 1000));
2069
2199
if(debug){
2070
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2071
(ret == 0) ? "successfully" : "with error");
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(ret == 0) ? "successfully" : "with error");
2072
2202
}
2073
2203
2074
2204
end:
2075
2205
2076
2206
if(debug){
2077
fprintf(stderr, "%s exiting\n", argv[0]);
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2078
2208
}
2079
2209
2080
2210
/* Cleanup things */
2096
2226
if(gpgme_initialized){
2097
2227
gpgme_release(mc.ctx);
2098
2228
}
2099
2229
2100
2230
/* Cleans up the circular linked list of Mandos servers the client
2101
2231
has seen */
2102
2232
if(mc.current_server != NULL){
2108
2238
}
2109
2239
}
2110
2240
2111
/* XXX run network hooks "stop" here */
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2112
2243
2113
/* Take down the network interface */
2114
if(take_down_interface){
2115
/* Re-raise priviliges */
2244
/* Re-raise priviliges */
2245
{
2116
2246
errno = 0;
2117
2247
ret = seteuid(0);
2118
2248
if(ret == -1){
2119
2249
perror_plus("seteuid");
2120
2250
}
2121
if(geteuid() == 0){
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2122
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2123
2255
if(ret == -1){
2124
2256
perror_plus("ioctl SIOCGIFFLAGS");
2125
} else if(network.ifr_flags & IFF_UP) {
2257
} else if(network.ifr_flags & IFF_UP){
2126
2258
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2127
2259
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2128
2260
if(ret == -1){
2133
2265
if(ret == -1){
2134
2266
perror_plus("close");
2135
2267
}
2136
/* Lower privileges permanently */
2137
errno = 0;
2138
ret = setuid(uid);
2139
if(ret == -1){
2140
perror_plus("setuid");
2141
}
2142
2268
}
2143
2269
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2144
2276
2145
2277
/* Removes the GPGME temp directory and all files inside */
2146
2278
if(tempdir_created){
2160
2292
}
2161
2293
ret = remove(fullname);
2162
2294
if(ret == -1){
2163
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2164
strerror(errno));
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
2165
2297
}
2166
2298
free(fullname);
2167
2299
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0