To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 485
- compare with another revision
- download diff
- download tarball
- view history from revision 485
- Committer: Teddy Hogeborn
- Date: 2011-07-13 02:24:39 UTC
- mfrom: (24.1.174 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110713022439-wbv6kghshdsc2x24
Merge from Björn.
- files removed:
- debian/source/local-options
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
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
88
91
89
#ifdef __linux__
92
90
#include <sys/klog.h> /* klogctl() */
110
108
init_gnutls_session(),
111
109
GNUTLS_* */
112
110
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
115
113
116
114
/* GPGME */
117
115
#include <gpgme.h> /* All GPGME types, constants and
125
123
#define PATHDIR "/conf/conf.d/mandos"
126
124
#define SECKEY "seckey.txt"
127
125
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
126
130
127
bool debug = false;
131
128
static const char mandos_protocol_version[] = "1";
132
129
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
131
static const char sys_class_net[] = "/sys/class/net";
135
132
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
133
138
134
/* Doubly linked list that need to be circularly linked when used */
139
135
typedef struct server{
174
170
perror(print_text);
175
171
}
176
172
177
int fprintf_plus(FILE *stream, const char *format, ...){
178
va_list ap;
179
va_start (ap, format);
180
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
184
}
185
186
173
/*
187
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
188
175
* bytes. "buffer_capacity" is how much is currently allocated,
189
176
* "buffer_length" is how much is already used.
190
177
*/
191
178
size_t incbuffer(char **buffer, size_t buffer_length,
192
size_t buffer_capacity){
179
size_t buffer_capacity){
193
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
194
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
195
182
if(buffer == NULL){
200
187
return buffer_capacity;
201
188
}
202
189
203
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
206
193
int ret;
207
194
server *new_server = malloc(sizeof(server));
208
195
if(new_server == NULL){
210
197
return -1;
211
198
}
212
199
*new_server = (server){ .ip = strdup(ip),
213
.port = port,
214
.if_index = if_index,
215
.af = af };
200
.port = port,
201
.if_index = if_index,
202
.af = af };
216
203
if(new_server->ip == NULL){
217
204
perror_plus("strdup");
218
205
return -1;
219
206
}
220
/* Special case of first server */
207
/* unique case of first server */
221
208
if (mc.current_server == NULL){
222
209
new_server->next = new_server;
223
210
new_server->prev = new_server;
224
211
mc.current_server = new_server;
225
/* Place the new server last in the list */
212
/* Placing the new server last in the list */
226
213
} else {
227
214
new_server->next = mc.current_server;
228
215
new_server->prev = mc.current_server->prev;
240
227
/*
241
228
* Initialize GPGME.
242
229
*/
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
230
static bool init_gpgme(const char *seckey,
231
const char *pubkey, const char *tempdir){
245
232
gpgme_error_t rc;
246
233
gpgme_engine_info_t engine_info;
247
234
262
249
263
250
rc = gpgme_data_new_from_fd(&pgp_data, fd);
264
251
if(rc != GPG_ERR_NO_ERROR){
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
252
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
253
gpgme_strsource(rc), gpgme_strerror(rc));
267
254
return false;
268
255
}
269
256
270
257
rc = gpgme_op_import(mc.ctx, pgp_data);
271
258
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
259
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
260
gpgme_strsource(rc), gpgme_strerror(rc));
274
261
return false;
275
262
}
276
263
283
270
}
284
271
285
272
if(debug){
286
fprintf_plus(stderr, "Initializing GPGME\n");
273
fprintf(stderr, "Initializing GPGME\n");
287
274
}
288
275
289
276
/* Init GPGME */
290
277
gpgme_check_version(NULL);
291
278
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
292
279
if(rc != GPG_ERR_NO_ERROR){
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
280
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
295
282
return false;
296
283
}
297
284
298
/* Set GPGME home directory for the OpenPGP engine only */
285
/* Set GPGME home directory for the OpenPGP engine only */
299
286
rc = gpgme_get_engine_info(&engine_info);
300
287
if(rc != GPG_ERR_NO_ERROR){
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
303
290
return false;
304
291
}
305
292
while(engine_info != NULL){
311
298
engine_info = engine_info->next;
312
299
}
313
300
if(engine_info == NULL){
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
301
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
302
return false;
317
303
}
318
304
319
305
/* Create new GPGME "context" */
320
306
rc = gpgme_new(&(mc.ctx));
321
307
if(rc != GPG_ERR_NO_ERROR){
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
308
fprintf(stderr, "bad gpgme_new: %s: %s\n",
309
gpgme_strsource(rc), gpgme_strerror(rc));
325
310
return false;
326
311
}
327
312
346
331
ssize_t plaintext_length = 0;
347
332
348
333
if(debug){
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
334
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
335
}
351
336
352
337
/* Create new GPGME data buffer from memory cryptotext */
353
338
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
354
339
0);
355
340
if(rc != GPG_ERR_NO_ERROR){
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
341
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
342
gpgme_strsource(rc), gpgme_strerror(rc));
358
343
return -1;
359
344
}
360
345
361
346
/* Create new empty GPGME data buffer for the plaintext */
362
347
rc = gpgme_data_new(&dh_plain);
363
348
if(rc != GPG_ERR_NO_ERROR){
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
349
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
350
gpgme_strsource(rc), gpgme_strerror(rc));
367
351
gpgme_data_release(dh_crypto);
368
352
return -1;
369
353
}
372
356
data buffer */
373
357
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
374
358
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
359
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
377
361
plaintext_length = -1;
378
362
if(debug){
379
363
gpgme_decrypt_result_t result;
380
364
result = gpgme_op_decrypt_result(mc.ctx);
381
365
if(result == NULL){
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
366
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
367
} else {
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
368
fprintf(stderr, "Unsupported algorithm: %s\n",
369
result->unsupported_algorithm);
370
fprintf(stderr, "Wrong key usage: %u\n",
371
result->wrong_key_usage);
388
372
if(result->file_name != NULL){
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
373
fprintf(stderr, "File name: %s\n", result->file_name);
390
374
}
391
375
gpgme_recipient_t recipient;
392
376
recipient = result->recipients;
393
377
while(recipient != NULL){
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
400
? "No" : "Yes");
378
fprintf(stderr, "Public key algorithm: %s\n",
379
gpgme_pubkey_algo_name(recipient->pubkey_algo));
380
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
381
fprintf(stderr, "Secret key available: %s\n",
382
recipient->status == GPG_ERR_NO_SECKEY
383
? "No" : "Yes");
401
384
recipient = recipient->next;
402
385
}
403
386
}
406
389
}
407
390
408
391
if(debug){
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
392
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
393
}
411
394
412
395
/* Seek back to the beginning of the GPGME plaintext data buffer */
419
402
*plaintext = NULL;
420
403
while(true){
421
404
plaintext_capacity = incbuffer(plaintext,
422
(size_t)plaintext_length,
423
plaintext_capacity);
405
(size_t)plaintext_length,
406
plaintext_capacity);
424
407
if(plaintext_capacity == 0){
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
408
perror_plus("incbuffer");
409
plaintext_length = -1;
410
goto decrypt_end;
428
411
}
429
412
430
413
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
443
426
}
444
427
445
428
if(debug){
446
fprintf_plus(stderr, "Decrypted password is: ");
429
fprintf(stderr, "Decrypted password is: ");
447
430
for(ssize_t i = 0; i < plaintext_length; i++){
448
431
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
449
432
}
471
454
/* GnuTLS log function callback */
472
455
static void debuggnutls(__attribute__((unused)) int level,
473
456
const char* string){
474
fprintf_plus(stderr, "GnuTLS: %s", string);
457
fprintf(stderr, "GnuTLS: %s", string);
475
458
}
476
459
477
460
static int init_gnutls_global(const char *pubkeyfilename,
479
462
int ret;
480
463
481
464
if(debug){
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
465
fprintf(stderr, "Initializing GnuTLS\n");
483
466
}
484
467
485
468
ret = gnutls_global_init();
486
469
if(ret != GNUTLS_E_SUCCESS){
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
470
fprintf(stderr, "GnuTLS global_init: %s\n",
471
safer_gnutls_strerror(ret));
489
472
return -1;
490
473
}
491
474
500
483
/* OpenPGP credentials */
501
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
502
485
if(ret != GNUTLS_E_SUCCESS){
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
486
fprintf(stderr, "GnuTLS memory error: %s\n",
487
safer_gnutls_strerror(ret));
505
488
gnutls_global_deinit();
506
489
return -1;
507
490
}
508
491
509
492
if(debug){
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
495
seckeyfilename);
514
496
}
515
497
516
498
ret = gnutls_certificate_set_openpgp_key_file
517
499
(mc.cred, pubkeyfilename, seckeyfilename,
518
500
GNUTLS_OPENPGP_FMT_BASE64);
519
501
if(ret != GNUTLS_E_SUCCESS){
520
fprintf_plus(stderr,
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
502
fprintf(stderr,
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
525
507
goto globalfail;
526
508
}
527
509
528
510
/* GnuTLS server initialization */
529
511
ret = gnutls_dh_params_init(&mc.dh_params);
530
512
if(ret != GNUTLS_E_SUCCESS){
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
514
" %s\n", safer_gnutls_strerror(ret));
534
515
goto globalfail;
535
516
}
536
517
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
537
518
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
520
safer_gnutls_strerror(ret));
540
521
goto globalfail;
541
522
}
542
523
562
543
}
563
544
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
564
545
if(ret != GNUTLS_E_SUCCESS){
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
546
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
547
safer_gnutls_strerror(ret));
568
548
}
569
549
570
550
{
577
557
}
578
558
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
579
559
if(ret != GNUTLS_E_SUCCESS){
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
560
fprintf(stderr, "Syntax error at: %s\n", err);
561
fprintf(stderr, "GnuTLS error: %s\n",
562
safer_gnutls_strerror(ret));
583
563
gnutls_deinit(*session);
584
564
return -1;
585
565
}
594
574
}
595
575
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
596
576
if(ret != GNUTLS_E_SUCCESS){
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
577
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
578
safer_gnutls_strerror(ret));
599
579
gnutls_deinit(*session);
600
580
return -1;
601
581
}
646
626
pf = PF_INET;
647
627
break;
648
628
default:
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
629
fprintf(stderr, "Bad address family: %d\n", af);
650
630
errno = EINVAL;
651
631
return -1;
652
632
}
657
637
}
658
638
659
639
if(debug){
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
640
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
641
"\n", ip, port);
662
642
}
663
643
664
644
tcp_sd = socket(pf, SOCK_STREAM, 0);
690
670
}
691
671
if(ret == 0){
692
672
int e = errno;
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
673
fprintf(stderr, "Bad address: %s\n", ip);
694
674
errno = e;
695
675
goto mandos_end;
696
676
}
701
681
702
682
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
703
683
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
704
-Wunreachable-code*/
684
-Wunreachable-code*/
705
685
if(if_index == AVAHI_IF_UNSPEC){
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
687
" without a network interface\n");
708
688
errno = EINVAL;
709
689
goto mandos_end;
710
690
}
728
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
709
perror_plus("if_indextoname");
730
710
} else {
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
ip, interface, port);
733
713
}
734
714
} else {
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
715
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
716
port);
737
717
}
738
718
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
719
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
749
729
perror_plus("inet_ntop");
750
730
} else {
751
731
if(strcmp(addrstr, ip) != 0){
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
733
}
754
734
}
755
735
}
783
763
while(true){
784
764
size_t out_size = strlen(out);
785
765
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
786
out_size - written));
766
out_size - written));
787
767
if(ret == -1){
788
768
int e = errno;
789
769
perror_plus("write");
809
789
}
810
790
811
791
if(debug){
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
792
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
793
}
814
794
815
795
if(quit_now){
835
815
836
816
if(ret != GNUTLS_E_SUCCESS){
837
817
if(debug){
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
819
gnutls_perror(ret);
840
820
}
841
821
errno = EPROTO;
845
825
/* Read OpenPGP packet that contains the wanted password */
846
826
847
827
if(debug){
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
828
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
829
ip);
850
830
}
851
831
852
832
while(true){
857
837
}
858
838
859
839
buffer_capacity = incbuffer(&buffer, buffer_length,
860
buffer_capacity);
840
buffer_capacity);
861
841
if(buffer_capacity == 0){
862
842
int e = errno;
863
843
perror_plus("incbuffer");
890
870
}
891
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
892
872
if(ret < 0){
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
874
gnutls_perror(ret);
896
875
errno = EPROTO;
897
876
goto mandos_end;
898
877
}
899
878
break;
900
879
default:
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
880
fprintf(stderr, "Unknown error while reading data from"
881
" encrypted session with Mandos server\n");
903
882
gnutls_bye(session, GNUTLS_SHUT_RDWR);
904
883
errno = EIO;
905
884
goto mandos_end;
910
889
}
911
890
912
891
if(debug){
913
fprintf_plus(stderr, "Closing TLS session\n");
892
fprintf(stderr, "Closing TLS session\n");
914
893
}
915
894
916
895
if(quit_now){
928
907
929
908
if(buffer_length > 0){
930
909
ssize_t decrypted_buffer_size;
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
910
decrypted_buffer_size = pgp_packet_decrypt(buffer,
911
buffer_length,
932
912
&decrypted_buffer);
933
913
if(decrypted_buffer_size >= 0){
934
914
945
925
if(ret == 0 and ferror(stdout)){
946
926
int e = errno;
947
927
if(debug){
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
928
fprintf(stderr, "Error writing encrypted data: %s\n",
929
strerror(errno));
950
930
}
951
931
errno = e;
952
932
goto mandos_end;
1009
989
switch(event){
1010
990
default:
1011
991
case AVAHI_RESOLVER_FAILURE:
1012
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1013
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1014
domain,
1015
avahi_strerror(avahi_server_errno(mc.server)));
992
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
993
" of type '%s' in domain '%s': %s\n", name, type, domain,
994
avahi_strerror(avahi_server_errno(mc.server)));
1016
995
break;
1017
996
1018
997
case AVAHI_RESOLVER_FOUND:
1020
999
char ip[AVAHI_ADDRESS_STR_MAX];
1021
1000
avahi_address_snprint(ip, sizeof(ip), address);
1022
1001
if(debug){
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1004
ip, (intmax_t)interface, port);
1026
1005
}
1027
1006
int ret = start_mandos_communication(ip, port, interface,
1028
1007
avahi_proto_to_af(proto));
1060
1039
default:
1061
1040
case AVAHI_BROWSER_FAILURE:
1062
1041
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1042
fprintf(stderr, "(Avahi browser) %s\n",
1043
avahi_strerror(avahi_server_errno(mc.server)));
1065
1044
avahi_simple_poll_quit(mc.simple_poll);
1066
1045
return;
1067
1046
1074
1053
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1075
1054
name, type, domain, protocol, 0,
1076
1055
resolve_callback, NULL) == NULL)
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
1056
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1057
name, avahi_strerror(avahi_server_errno(mc.server)));
1080
1058
break;
1081
1059
1082
1060
case AVAHI_BROWSER_REMOVE:
1085
1063
case AVAHI_BROWSER_ALL_FOR_NOW:
1086
1064
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1087
1065
if(debug){
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1066
fprintf(stderr, "No Mandos server found, still searching...\n");
1090
1067
}
1091
1068
break;
1092
1069
}
1107
1084
errno = old_errno;
1108
1085
}
1109
1086
1110
bool get_flags(const char *ifname, struct ifreq *ifr){
1111
int ret;
1112
1113
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1114
if(s < 0){
1115
perror_plus("socket");
1116
return false;
1117
}
1118
strcpy(ifr->ifr_name, ifname);
1119
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1120
if(ret == -1){
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1121
1143
if(debug){
1122
perror_plus("ioctl SIOCGIFFLAGS");
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1123
1146
}
1124
return false;
1147
free(flagstring);
1148
return 0;
1125
1149
}
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1131
1152
/* Reject the loopback device */
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
if(flags & IFF_LOOPBACK){
1133
1154
if(debug){
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1136
1157
}
1137
return false;
1158
return 0;
1138
1159
}
1139
1160
/* Accept point-to-point devices only if connect_to is specified */
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1141
1162
if(debug){
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1144
1165
}
1145
return true;
1166
return 1;
1146
1167
}
1147
1168
/* Otherwise, reject non-broadcast-capable devices */
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
if(not (flags & IFF_BROADCAST)){
1149
1170
if(debug){
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1152
1173
}
1153
return false;
1174
return 0;
1154
1175
}
1155
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1156
if(ifr->ifr_flags & IFF_NOARP){
1177
if(flags & IFF_NOARP){
1157
1178
if(debug){
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1160
1181
}
1161
return false;
1182
return 0;
1162
1183
}
1163
1164
1184
/* Accept this device */
1165
1185
if(debug){
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1167
}
1168
return true;
1169
}
1170
1171
/*
1172
* This function determines if a directory entry in /sys/class/net
1173
* corresponds to an acceptable network device.
1174
* (This function is passed to scandir(3) as a filter function.)
1175
*/
1176
int good_interface(const struct dirent *if_entry){
1177
if(if_entry->d_name[0] == '.'){
1178
return 0;
1179
}
1180
1181
struct ifreq ifr;
1182
if(not get_flags(if_entry->d_name, &ifr)){
1183
if(debug){
1184
fprintf_plus(stderr, "Failed to get flags for interface "
1185
"\"%s\"\n", if_entry->d_name);
1186
}
1187
return 0;
1188
}
1189
1190
if(not good_flags(if_entry->d_name, &ifr)){
1191
return 0;
1192
}
1193
return 1;
1194
}
1195
1196
/*
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1200
*/
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1203
return 0;
1204
}
1205
1206
struct ifreq ifr;
1207
if(not get_flags(if_entry->d_name, &ifr)){
1208
if(debug){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1211
}
1212
return 0;
1213
}
1214
1215
/* Reject down interfaces */
1216
if(not (ifr.ifr_flags & IFF_UP)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1219
if_entry->d_name);
1220
}
1221
return 0;
1222
}
1223
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1226
if(debug){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1228
if_entry->d_name);
1229
}
1230
return 0;
1231
}
1232
1233
if(not good_flags(if_entry->d_name, &ifr)){
1234
return 0;
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1235
1188
}
1236
1189
return 1;
1237
1190
}
1247
1200
return 1;
1248
1201
}
1249
1202
1250
/* Is this directory entry a runnable program? */
1251
int runnable_hook(const struct dirent *direntry){
1252
int ret;
1253
size_t sret;
1254
struct stat st;
1255
1256
if((direntry->d_name)[0] == '\0'){
1257
/* Empty name? */
1258
return 0;
1259
}
1260
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1263
"0123456789"
1264
"_-");
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1267
if(debug){
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1269
direntry->d_name);
1270
}
1271
return 0;
1272
}
1273
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1276
if(ret < 0){
1277
perror_plus("asprintf");
1278
return 0;
1279
}
1280
1281
ret = stat(fullname, &st);
1282
if(ret == -1){
1283
if(debug){
1284
perror_plus("Could not stat hook");
1285
}
1286
return 0;
1287
}
1288
if(not (S_ISREG(st.st_mode))){
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1294
return 0;
1295
}
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
if(debug){
1305
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1306
direntry->d_name);
1307
}
1308
return 1;
1309
}
1310
1311
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1312
1204
int ret;
1313
1205
struct timespec now;
1314
1206
struct timespec waited_time;
1315
1207
intmax_t block_time;
1316
1208
1317
1209
while(true){
1318
1210
if(mc.current_server == NULL){
1319
1211
if (debug){
1320
fprintf_plus(stderr, "Wait until first server is found."
1321
" No timeout!\n");
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1322
1214
}
1323
1215
ret = avahi_simple_poll_iterate(s, -1);
1324
1216
} else {
1325
1217
if (debug){
1326
fprintf_plus(stderr, "Check current_server if we should run"
1327
" it, or wait\n");
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1328
1220
}
1329
1221
/* the current time */
1330
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1344
1236
block_time = ((retry_interval
1345
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1346
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1347
1239
1348
1240
if (debug){
1349
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1350
block_time);
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1351
1242
}
1352
1243
1353
1244
if(block_time <= 0){
1354
1245
ret = start_mandos_communication(mc.current_server->ip,
1355
1246
mc.current_server->port,
1373
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1374
1265
}
1375
1266
if(ret != 0){
1376
if (ret > 0 or errno != EINTR){
1267
if (ret > 0 or errno != EINTR) {
1377
1268
return (ret != 1) ? ret : 0;
1378
1269
}
1379
1270
}
1380
1271
}
1381
1272
}
1382
1273
1383
bool run_network_hooks(const char *mode, const char *interface,
1384
const float delay){
1385
struct dirent **direntries;
1386
struct dirent *direntry;
1387
int ret;
1388
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1389
alphasort);
1390
if(numhooks == -1){
1391
perror_plus("scandir");
1392
} else {
1393
int devnull = open("/dev/null", O_RDONLY);
1394
for(int i = 0; i < numhooks; i++){
1395
direntry = direntries[i];
1396
char *fullname = NULL;
1397
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1398
if(ret < 0){
1399
perror_plus("asprintf");
1400
continue;
1401
}
1402
if(debug){
1403
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1404
direntry->d_name);
1405
}
1406
pid_t hook_pid = fork();
1407
if(hook_pid == 0){
1408
/* Child */
1409
dup2(devnull, STDIN_FILENO);
1410
close(devnull);
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1412
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1413
if(ret == -1){
1414
perror_plus("setenv");
1415
_exit(EX_OSERR);
1416
}
1417
ret = setenv("DEVICE", interface, 1);
1418
if(ret == -1){
1419
perror_plus("setenv");
1420
_exit(EX_OSERR);
1421
}
1422
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1423
if(ret == -1){
1424
perror_plus("setenv");
1425
_exit(EX_OSERR);
1426
}
1427
ret = setenv("MODE", mode, 1);
1428
if(ret == -1){
1429
perror_plus("setenv");
1430
_exit(EX_OSERR);
1431
}
1432
char *delaystring;
1433
ret = asprintf(&delaystring, "%f", delay);
1434
if(ret == -1){
1435
perror_plus("asprintf");
1436
_exit(EX_OSERR);
1437
}
1438
ret = setenv("DELAY", delaystring, 1);
1439
if(ret == -1){
1440
free(delaystring);
1441
perror_plus("setenv");
1442
_exit(EX_OSERR);
1443
}
1444
free(delaystring);
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1447
} else {
1448
int status;
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1450
perror_plus("waitpid");
1451
free(fullname);
1452
continue;
1453
}
1454
if(WIFEXITED(status)){
1455
if(WEXITSTATUS(status) != 0){
1456
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1457
" with status %d\n", direntry->d_name,
1458
WEXITSTATUS(status));
1459
free(fullname);
1460
continue;
1461
}
1462
} else if(WIFSIGNALED(status)){
1463
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1464
" signal %d\n", direntry->d_name,
1465
WTERMSIG(status));
1466
free(fullname);
1467
continue;
1468
} else {
1469
fprintf_plus(stderr, "Warning: network hook \"%s\""
1470
" crashed\n", direntry->d_name);
1471
free(fullname);
1472
continue;
1473
}
1474
}
1475
free(fullname);
1476
if(debug){
1477
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1478
direntry->d_name);
1479
}
1480
}
1481
close(devnull);
1482
}
1483
return true;
1484
}
1485
1486
1274
int main(int argc, char *argv[]){
1487
1275
AvahiSServiceBrowser *sb = NULL;
1488
1276
int error;
1570
1358
.arg = "SECONDS",
1571
1359
.doc = "Retry interval used when denied by the mandos server",
1572
1360
.group = 2 },
1573
{ .name = "network-hook-dir", .key = 133,
1574
.arg = "DIR",
1575
.doc = "Directory where network hooks are located",
1576
.group = 2 },
1577
1361
/*
1578
1362
* These reproduce what we would get without ARGP_NO_HELP
1579
1363
*/
1627
1411
errno = 0;
1628
1412
retry_interval = strtod(arg, &tmp);
1629
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1630
or (retry_interval * 1000) > INT_MAX
1631
or retry_interval < 0){
1414
or (retry_interval * 1000) > INT_MAX){
1632
1415
argp_error(state, "Bad retry interval");
1633
1416
}
1634
1417
break;
1635
case 133: /* --network-hook-dir */
1636
hookdir = arg;
1637
break;
1638
1418
/*
1639
1419
* These reproduce what we would get without ARGP_NO_HELP
1640
1420
*/
1646
1426
argp_state_help(state, state->out_stream,
1647
1427
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1648
1428
case 'V': /* --version */
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1651
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1429
fprintf(state->out_stream, "%s\n", argp_program_version);
1652
1430
exit(argp_err_exit_status);
1653
1431
break;
1654
1432
default:
1677
1455
goto end;
1678
1456
}
1679
1457
}
1680
1681
if(getuid() == 0){
1682
/* Work around Debian bug #633582:
1683
<http://bugs.debian.org/633582> */
1684
struct stat st;
1685
1686
/* Re-raise priviliges */
1687
errno = 0;
1688
ret = seteuid(0);
1689
if(ret == -1){
1690
perror_plus("seteuid");
1691
}
1692
1693
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1694
int seckey_fd = open(seckey, O_RDONLY);
1695
if(seckey_fd == -1){
1696
perror_plus("open");
1697
} else {
1698
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1699
if(ret == -1){
1700
perror_plus("fstat");
1701
} else {
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1704
ret = fchown(seckey_fd, uid, gid);
1705
if(ret == -1){
1706
perror_plus("fchown");
1707
}
1708
}
1709
}
1710
TEMP_FAILURE_RETRY(close(seckey_fd));
1711
}
1712
}
1713
1714
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1715
int pubkey_fd = open(pubkey, O_RDONLY);
1716
if(pubkey_fd == -1){
1717
perror_plus("open");
1718
} else {
1719
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1720
if(ret == -1){
1721
perror_plus("fstat");
1722
} else {
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1725
ret = fchown(pubkey_fd, uid, gid);
1726
if(ret == -1){
1727
perror_plus("fchown");
1728
}
1729
}
1730
}
1731
TEMP_FAILURE_RETRY(close(pubkey_fd));
1732
}
1733
}
1734
1735
/* Lower privileges */
1736
errno = 0;
1737
ret = seteuid(uid);
1738
if(ret == -1){
1739
perror_plus("seteuid");
1740
}
1741
}
1742
1743
/* Run network hooks */
1744
{
1745
if(getuid() == 0){
1746
/* Re-raise priviliges */
1747
errno = 0;
1748
ret = seteuid(0);
1749
if(ret == -1){
1750
perror_plus("seteuid");
1751
}
1752
}
1753
if(not run_network_hooks("start", interface, delay)){
1754
goto end;
1755
}
1756
if(getuid() == 0){
1757
/* Lower privileges */
1758
errno = 0;
1759
ret = seteuid(uid);
1760
if(ret == -1){
1761
perror_plus("seteuid");
1762
}
1763
}
1764
}
1765
1458
1766
1459
if(not debug){
1767
1460
avahi_set_log_function(empty_log);
1768
1461
}
1769
1462
1770
1463
if(interface[0] == '\0'){
1771
1464
struct dirent **direntries;
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1465
ret = scandir(sys_class_net, &direntries, good_interface,
1774
1466
alphasort);
1775
if(ret == 0){
1776
/* No up interfaces, look for any good interfaces */
1777
free(direntries);
1778
ret = scandir(sys_class_net, &direntries, good_interface,
1779
alphasort);
1780
}
1781
1467
if(ret >= 1){
1782
/* Pick the first interface returned */
1468
/* Pick the first good interface */
1783
1469
interface = strdup(direntries[0]->d_name);
1784
1470
if(debug){
1785
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1471
fprintf(stderr, "Using interface \"%s\"\n", interface);
1786
1472
}
1787
1473
if(interface == NULL){
1788
1474
perror_plus("malloc");
1793
1479
free(direntries);
1794
1480
} else {
1795
1481
free(direntries);
1796
fprintf_plus(stderr, "Could not find a network interface\n");
1482
fprintf(stderr, "Could not find a network interface\n");
1797
1483
exitcode = EXIT_FAILURE;
1798
1484
goto end;
1799
1485
}
1805
1491
srand((unsigned int) time(NULL));
1806
1492
mc.simple_poll = avahi_simple_poll_new();
1807
1493
if(mc.simple_poll == NULL){
1808
fprintf_plus(stderr,
1809
"Avahi: Failed to create simple poll object.\n");
1494
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1810
1495
exitcode = EX_UNAVAILABLE;
1811
1496
goto end;
1812
1497
}
1878
1563
if(strcmp(interface, "none") != 0){
1879
1564
if_index = (AvahiIfIndex) if_nametoindex(interface);
1880
1565
if(if_index == 0){
1881
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1566
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1882
1567
exitcode = EX_UNAVAILABLE;
1883
1568
goto end;
1884
1569
}
2004
1689
#endif /* __linux__ */
2005
1690
/* Lower privileges */
2006
1691
errno = 0;
2007
/* Lower privileges */
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
1692
if(take_down_interface){
1693
/* Lower privileges */
1694
ret = seteuid(uid);
1695
if(ret == -1){
1696
perror_plus("seteuid");
1697
}
1698
} else {
1699
/* Lower privileges permanently */
1700
ret = setuid(uid);
1701
if(ret == -1){
1702
perror_plus("setuid");
1703
}
2011
1704
}
2012
1705
}
2013
1706
2017
1710
2018
1711
ret = init_gnutls_global(pubkey, seckey);
2019
1712
if(ret == -1){
2020
fprintf_plus(stderr, "init_gnutls_global failed\n");
1713
fprintf(stderr, "init_gnutls_global failed\n");
2021
1714
exitcode = EX_UNAVAILABLE;
2022
1715
goto end;
2023
1716
} else {
2039
1732
}
2040
1733
2041
1734
if(not init_gpgme(pubkey, seckey, tempdir)){
2042
fprintf_plus(stderr, "init_gpgme failed\n");
1735
fprintf(stderr, "init_gpgme failed\n");
2043
1736
exitcode = EX_UNAVAILABLE;
2044
1737
goto end;
2045
1738
} else {
2055
1748
/* (Mainly meant for debugging) */
2056
1749
char *address = strrchr(connect_to, ':');
2057
1750
if(address == NULL){
2058
fprintf_plus(stderr, "No colon in address\n");
1751
fprintf(stderr, "No colon in address\n");
2059
1752
exitcode = EX_USAGE;
2060
1753
goto end;
2061
1754
}
2069
1762
tmpmax = strtoimax(address+1, &tmp, 10);
2070
1763
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2071
1764
or tmpmax != (uint16_t)tmpmax){
2072
fprintf_plus(stderr, "Bad port number\n");
1765
fprintf(stderr, "Bad port number\n");
2073
1766
exitcode = EX_USAGE;
2074
1767
goto end;
2075
1768
}
2080
1773
2081
1774
port = (uint16_t)tmpmax;
2082
1775
*address = '\0';
1776
address = connect_to;
2083
1777
/* Colon in address indicates IPv6 */
2084
1778
int af;
2085
if(strchr(connect_to, ':') != NULL){
1779
if(strchr(address, ':') != NULL){
2086
1780
af = AF_INET6;
2087
/* Accept [] around IPv6 address - see RFC 5952 */
2088
if(connect_to[0] == '[' and address[-1] == ']')
2089
{
2090
connect_to++;
2091
address[-1] = '\0';
2092
}
2093
1781
} else {
2094
1782
af = AF_INET;
2095
1783
}
2096
address = connect_to;
2097
1784
2098
1785
if(quit_now){
2099
1786
goto end;
2100
1787
}
2101
1788
2102
1789
while(not quit_now){
2103
1790
ret = start_mandos_communication(address, port, if_index, af);
2104
1791
if(quit_now or ret == 0){
2105
1792
break;
2106
1793
}
2107
if(debug){
2108
fprintf_plus(stderr, "Retrying in %d seconds\n",
2109
(int)retry_interval);
2110
}
2111
sleep((int)retry_interval);
2112
}
2113
1794
sleep((int)retry_interval or 1);
1795
};
1796
2114
1797
if (not quit_now){
2115
1798
exitcode = EXIT_SUCCESS;
2116
1799
}
2117
1800
2118
1801
goto end;
2119
1802
}
2120
1803
2142
1825
2143
1826
/* Check if creating the Avahi server object succeeded */
2144
1827
if(mc.server == NULL){
2145
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2146
avahi_strerror(error));
1828
fprintf(stderr, "Failed to create Avahi server: %s\n",
1829
avahi_strerror(error));
2147
1830
exitcode = EX_UNAVAILABLE;
2148
1831
goto end;
2149
1832
}
2157
1840
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2158
1841
NULL, 0, browse_callback, NULL);
2159
1842
if(sb == NULL){
2160
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2161
avahi_strerror(avahi_server_errno(mc.server)));
1843
fprintf(stderr, "Failed to create service browser: %s\n",
1844
avahi_strerror(avahi_server_errno(mc.server)));
2162
1845
exitcode = EX_UNAVAILABLE;
2163
1846
goto end;
2164
1847
}
2170
1853
/* Run the main loop */
2171
1854
2172
1855
if(debug){
2173
fprintf_plus(stderr, "Starting Avahi loop search\n");
1856
fprintf(stderr, "Starting Avahi loop search\n");
2174
1857
}
2175
1858
2176
1859
ret = avahi_loop_with_timeout(mc.simple_poll,
2177
1860
(int)(retry_interval * 1000));
2178
1861
if(debug){
2179
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2180
(ret == 0) ? "successfully" : "with error");
1862
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1863
(ret == 0) ? "successfully" : "with error");
2181
1864
}
2182
1865
2183
1866
end:
2184
1867
2185
1868
if(debug){
2186
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1869
fprintf(stderr, "%s exiting\n", argv[0]);
2187
1870
}
2188
1871
2189
1872
/* Cleanup things */
2205
1888
if(gpgme_initialized){
2206
1889
gpgme_release(mc.ctx);
2207
1890
}
2208
1891
2209
1892
/* Cleans up the circular linked list of Mandos servers the client
2210
1893
has seen */
2211
1894
if(mc.current_server != NULL){
2217
1900
}
2218
1901
}
2219
1902
2220
/* Re-raise priviliges */
2221
{
2222
if(getuid() == 0){
2223
errno = 0;
2224
ret = seteuid(0);
2225
if(ret == -1){
2226
perror_plus("seteuid");
2227
}
1903
/* Take down the network interface */
1904
if(take_down_interface){
1905
/* Re-raise priviliges */
1906
errno = 0;
1907
ret = seteuid(0);
1908
if(ret == -1){
1909
perror_plus("seteuid");
2228
1910
}
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2233
/* Take down the network interface */
2234
if(take_down_interface and geteuid() == 0){
1911
if(geteuid() == 0){
2235
1912
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2236
1913
if(ret == -1){
2237
1914
perror_plus("ioctl SIOCGIFFLAGS");
2238
} else if(network.ifr_flags & IFF_UP){
1915
} else if(network.ifr_flags & IFF_UP) {
2239
1916
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2240
1917
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2241
1918
if(ret == -1){
2246
1923
if(ret == -1){
2247
1924
perror_plus("close");
2248
1925
}
2249
}
2250
}
2251
if(getuid() == 0){
2252
/* Lower privileges permanently */
2253
errno = 0;
2254
ret = setuid(uid);
2255
if(ret == -1){
2256
perror_plus("setuid");
1926
/* Lower privileges permanently */
1927
errno = 0;
1928
ret = setuid(uid);
1929
if(ret == -1){
1930
perror_plus("setuid");
1931
}
2257
1932
}
2258
1933
}
2259
1934
2261
1936
if(tempdir_created){
2262
1937
struct dirent **direntries = NULL;
2263
1938
struct dirent *direntry = NULL;
2264
int numentries = scandir(tempdir, &direntries, notdotentries,
2265
alphasort);
2266
if (numentries > 0){
2267
for(int i = 0; i < numentries; i++){
1939
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1940
if (ret > 0){
1941
for(int i = 0; i < ret; i++){
2268
1942
direntry = direntries[i];
2269
1943
char *fullname = NULL;
2270
1944
ret = asprintf(&fullname, "%s/%s", tempdir,
2275
1949
}
2276
1950
ret = remove(fullname);
2277
1951
if(ret == -1){
2278
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2279
strerror(errno));
1952
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1953
strerror(errno));
2280
1954
}
2281
1955
free(fullname);
2282
1956
}
2283
1957
}
2284
1958
2285
/* need to clean even if 0 because man page doesn't specify */
1959
/* need to be cleaned even if ret == 0 because man page doesn't
1960
specify */
2286
1961
free(direntries);
2287
if (numentries == -1){
1962
if (ret == -1){
2288
1963
perror_plus("scandir");
2289
1964
}
2290
1965
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0