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- Committer: Teddy Hogeborn
- Date: 2012-05-17 01:55:58 UTC
- Revision ID: teddy@recompile.se-20120517015558-5703p8nkquc2rhgd
* .bzrignore (statedir): Added.
- files added:
- network-hooks.d
- files modified:
- .bzrignore
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
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
110
111
init_gnutls_session(),
111
112
GNUTLS_* */
112
113
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
115
116
116
117
/* GPGME */
117
118
#include <gpgme.h> /* All GPGME types, constants and
133
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
134
135
static const char sys_class_net[] = "/sys/class/net";
135
136
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
136
138
137
139
/* Doubly linked list that need to be circularly linked when used */
138
140
typedef struct server{
168
170
169
171
/* Function to use when printing errors */
170
172
void perror_plus(const char *print_text){
173
int e = errno;
171
174
fprintf(stderr, "Mandos plugin %s: ",
172
175
program_invocation_short_name);
176
errno = e;
173
177
perror(print_text);
174
178
}
175
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
176
190
/*
177
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
178
192
* bytes. "buffer_capacity" is how much is currently allocated,
179
193
* "buffer_length" is how much is already used.
180
194
*/
181
195
size_t incbuffer(char **buffer, size_t buffer_length,
182
size_t buffer_capacity){
196
size_t buffer_capacity){
183
197
if(buffer_length + BUFFER_SIZE > buffer_capacity){
184
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
185
199
if(buffer == NULL){
191
205
}
192
206
193
207
/* Add server to set of servers to retry periodically */
194
int add_server(const char *ip, uint16_t port,
195
AvahiIfIndex if_index,
196
int af){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
197
210
int ret;
198
211
server *new_server = malloc(sizeof(server));
199
212
if(new_server == NULL){
200
213
perror_plus("malloc");
201
return -1;
214
return false;
202
215
}
203
216
*new_server = (server){ .ip = strdup(ip),
204
.port = port,
205
.if_index = if_index,
206
.af = af };
217
.port = port,
218
.if_index = if_index,
219
.af = af };
207
220
if(new_server->ip == NULL){
208
221
perror_plus("strdup");
209
return -1;
222
return false;
210
223
}
211
224
/* Special case of first server */
212
225
if (mc.current_server == NULL){
223
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
224
237
if(ret == -1){
225
238
perror_plus("clock_gettime");
226
return -1;
239
return false;
227
240
}
228
return 0;
241
return true;
229
242
}
230
243
231
244
/*
232
245
* Initialize GPGME.
233
246
*/
234
static bool init_gpgme(const char *seckey,
235
const char *pubkey, const char *tempdir){
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
236
249
gpgme_error_t rc;
237
250
gpgme_engine_info_t engine_info;
238
251
253
266
254
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
268
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
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));
259
271
return false;
260
272
}
261
273
262
274
rc = gpgme_op_import(mc.ctx, pgp_data);
263
275
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
267
278
return false;
268
279
}
269
280
276
287
}
277
288
278
289
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
281
291
}
282
292
283
293
/* Init GPGME */
284
294
gpgme_check_version(NULL);
285
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
296
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
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));
290
299
return false;
291
300
}
292
301
293
302
/* Set GPGME home directory for the OpenPGP engine only */
294
303
rc = gpgme_get_engine_info(&engine_info);
295
304
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
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));
299
307
return false;
300
308
}
301
309
while(engine_info != NULL){
307
315
engine_info = engine_info->next;
308
316
}
309
317
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"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);
312
320
return false;
313
321
}
314
322
315
323
/* Create new GPGME "context" */
316
324
rc = gpgme_new(&(mc.ctx));
317
325
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
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));
321
329
return false;
322
330
}
323
331
342
350
ssize_t plaintext_length = 0;
343
351
344
352
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
347
354
}
348
355
349
356
/* Create new GPGME data buffer from memory cryptotext */
350
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
358
0);
352
359
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
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));
356
362
return -1;
357
363
}
358
364
359
365
/* Create new empty GPGME data buffer for the plaintext */
360
366
rc = gpgme_data_new(&dh_plain);
361
367
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
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));
365
371
gpgme_data_release(dh_crypto);
366
372
return -1;
367
373
}
370
376
data buffer */
371
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
378
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
376
381
plaintext_length = -1;
377
382
if(debug){
378
383
gpgme_decrypt_result_t result;
379
384
result = gpgme_op_decrypt_result(mc.ctx);
380
385
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
383
387
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
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);
390
392
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
393
394
}
394
395
gpgme_recipient_t recipient;
395
396
recipient = result->recipients;
396
397
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
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");
406
405
recipient = recipient->next;
407
406
}
408
407
}
411
410
}
412
411
413
412
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
416
414
}
417
415
418
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
425
423
*plaintext = NULL;
426
424
while(true){
427
425
plaintext_capacity = incbuffer(plaintext,
428
(size_t)plaintext_length,
429
plaintext_capacity);
426
(size_t)plaintext_length,
427
plaintext_capacity);
430
428
if(plaintext_capacity == 0){
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
429
perror_plus("incbuffer");
430
plaintext_length = -1;
431
goto decrypt_end;
434
432
}
435
433
436
434
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
449
447
}
450
448
451
449
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
454
451
for(ssize_t i = 0; i < plaintext_length; i++){
455
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
453
}
478
475
/* GnuTLS log function callback */
479
476
static void debuggnutls(__attribute__((unused)) int level,
480
477
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
478
fprintf_plus(stderr, "GnuTLS: %s", string);
482
479
}
483
480
484
481
static int init_gnutls_global(const char *pubkeyfilename,
486
483
int ret;
487
484
488
485
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
491
487
}
492
488
493
489
ret = gnutls_global_init();
494
490
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
497
493
return -1;
498
494
}
499
495
508
504
/* OpenPGP credentials */
509
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
506
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
513
509
gnutls_global_deinit();
514
510
return -1;
515
511
}
516
512
517
513
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
522
518
}
523
519
524
520
ret = gnutls_certificate_set_openpgp_key_file
525
521
(mc.cred, pubkeyfilename, seckeyfilename,
526
522
GNUTLS_OPENPGP_FMT_BASE64);
527
523
if(ret != GNUTLS_E_SUCCESS){
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
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));
534
529
goto globalfail;
535
530
}
536
531
537
532
/* GnuTLS server initialization */
538
533
ret = gnutls_dh_params_init(&mc.dh_params);
539
534
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
543
538
goto globalfail;
544
539
}
545
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
541
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
550
544
goto globalfail;
551
545
}
552
546
572
566
}
573
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
568
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
578
572
}
579
573
580
574
{
587
581
}
588
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
583
if(ret != GNUTLS_E_SUCCESS){
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
594
587
gnutls_deinit(*session);
595
588
return -1;
596
589
}
605
598
}
606
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
600
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
611
603
gnutls_deinit(*session);
612
604
return -1;
613
605
}
658
650
pf = PF_INET;
659
651
break;
660
652
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
663
654
errno = EINVAL;
664
655
return -1;
665
656
}
670
661
}
671
662
672
663
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
676
666
}
677
667
678
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
704
694
}
705
695
if(ret == 0){
706
696
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
709
698
errno = e;
710
699
goto mandos_end;
711
700
}
716
705
717
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
-Wunreachable-code*/
708
-Wunreachable-code*/
720
709
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
724
712
errno = EINVAL;
725
713
goto mandos_end;
726
714
}
744
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
733
perror_plus("if_indextoname");
746
734
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
750
737
}
751
738
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
754
741
}
755
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
766
753
perror_plus("inet_ntop");
767
754
} else {
768
755
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
771
757
}
772
758
}
773
759
}
801
787
while(true){
802
788
size_t out_size = strlen(out);
803
789
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
804
out_size - written));
790
out_size - written));
805
791
if(ret == -1){
806
792
int e = errno;
807
793
perror_plus("write");
827
813
}
828
814
829
815
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
832
817
}
833
818
834
819
if(quit_now){
854
839
855
840
if(ret != GNUTLS_E_SUCCESS){
856
841
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
859
843
gnutls_perror(ret);
860
844
}
861
845
errno = EPROTO;
865
849
/* Read OpenPGP packet that contains the wanted password */
866
850
867
851
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
870
854
}
871
855
872
856
while(true){
877
861
}
878
862
879
863
buffer_capacity = incbuffer(&buffer, buffer_length,
880
buffer_capacity);
864
buffer_capacity);
881
865
if(buffer_capacity == 0){
882
866
int e = errno;
883
867
perror_plus("incbuffer");
910
894
}
911
895
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
896
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
915
899
gnutls_perror(ret);
916
900
errno = EPROTO;
917
901
goto mandos_end;
918
902
}
919
903
break;
920
904
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
924
907
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
908
errno = EIO;
926
909
goto mandos_end;
931
914
}
932
915
933
916
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
917
fprintf_plus(stderr, "Closing TLS session\n");
936
918
}
937
919
938
920
if(quit_now){
950
932
951
933
if(buffer_length > 0){
952
934
ssize_t decrypted_buffer_size;
953
decrypted_buffer_size = pgp_packet_decrypt(buffer,
954
buffer_length,
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
955
936
&decrypted_buffer);
956
937
if(decrypted_buffer_size >= 0){
957
938
968
949
if(ret == 0 and ferror(stdout)){
969
950
int e = errno;
970
951
if(debug){
971
fprintf(stderr, "Mandos plugin mandos-client: "
972
"Error writing encrypted data: %s\n",
973
strerror(errno));
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
974
954
}
975
955
errno = e;
976
956
goto mandos_end;
1033
1013
switch(event){
1034
1014
default:
1035
1015
case AVAHI_RESOLVER_FAILURE:
1036
fprintf(stderr, "Mandos plugin mandos-client: "
1037
"(Avahi Resolver) Failed to resolve service '%s'"
1038
" of type '%s' in domain '%s': %s\n", name, type, domain,
1039
avahi_strerror(avahi_server_errno(mc.server)));
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)));
1040
1020
break;
1041
1021
1042
1022
case AVAHI_RESOLVER_FOUND:
1044
1024
char ip[AVAHI_ADDRESS_STR_MAX];
1045
1025
avahi_address_snprint(ip, sizeof(ip), address);
1046
1026
if(debug){
1047
fprintf(stderr, "Mandos plugin mandos-client: "
1048
"Mandos server \"%s\" found on %s (%s, %"
1049
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1050
ip, (intmax_t)interface, port);
1027
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);
1051
1030
}
1052
1031
int ret = start_mandos_communication(ip, port, interface,
1053
1032
avahi_proto_to_af(proto));
1054
1033
if(ret == 0){
1055
1034
avahi_simple_poll_quit(mc.simple_poll);
1056
1035
} else {
1057
ret = add_server(ip, port, interface,
1058
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
}
1059
1041
}
1060
1042
}
1061
1043
}
1085
1067
default:
1086
1068
case AVAHI_BROWSER_FAILURE:
1087
1069
1088
fprintf(stderr, "Mandos plugin mandos-client: "
1089
"(Avahi browser) %s\n",
1090
avahi_strerror(avahi_server_errno(mc.server)));
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
avahi_strerror(avahi_server_errno(mc.server)));
1091
1072
avahi_simple_poll_quit(mc.simple_poll);
1092
1073
return;
1093
1074
1100
1081
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1101
1082
name, type, domain, protocol, 0,
1102
1083
resolve_callback, NULL) == NULL)
1103
fprintf(stderr, "Mandos plugin mandos-client: "
1104
"Avahi: Failed to resolve service '%s': %s\n",
1105
name, avahi_strerror(avahi_server_errno(mc.server)));
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1085
" %s\n", name,
1086
avahi_strerror(avahi_server_errno(mc.server)));
1106
1087
break;
1107
1088
1108
1089
case AVAHI_BROWSER_REMOVE:
1111
1092
case AVAHI_BROWSER_ALL_FOR_NOW:
1112
1093
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1113
1094
if(debug){
1114
fprintf(stderr, "Mandos plugin mandos-client: "
1115
"No Mandos server found, still searching...\n");
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1116
1097
}
1117
1098
break;
1118
1099
}
1157
1138
/* Reject the loopback device */
1158
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1159
1140
if(debug){
1160
fprintf(stderr, "Mandos plugin mandos-client: "
1161
"Rejecting loopback interface \"%s\"\n", ifname);
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1162
1143
}
1163
1144
return false;
1164
1145
}
1165
1146
/* Accept point-to-point devices only if connect_to is specified */
1166
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1167
1148
if(debug){
1168
fprintf(stderr, "Mandos plugin mandos-client: "
1169
"Accepting point-to-point interface \"%s\"\n", ifname);
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1170
1151
}
1171
1152
return true;
1172
1153
}
1173
1154
/* Otherwise, reject non-broadcast-capable devices */
1174
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1175
1156
if(debug){
1176
fprintf(stderr, "Mandos plugin mandos-client: "
1177
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1178
1159
}
1179
1160
return false;
1180
1161
}
1181
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1182
1163
if(ifr->ifr_flags & IFF_NOARP){
1183
1164
if(debug){
1184
fprintf(stderr, "Mandos plugin mandos-client: "
1185
"Rejecting non-ARP interface \"%s\"\n", ifname);
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1186
1167
}
1187
1168
return false;
1188
1169
}
1189
1170
1190
1171
/* Accept this device */
1191
1172
if(debug){
1192
fprintf(stderr, "Mandos plugin mandos-client: "
1193
"Interface \"%s\" is good\n", ifname);
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1194
1174
}
1195
1175
return true;
1196
1176
}
1208
1188
struct ifreq ifr;
1209
1189
if(not get_flags(if_entry->d_name, &ifr)){
1210
1190
if(debug){
1211
fprintf(stderr, "Mandos plugin mandos-client: "
1212
"Failed to get flags for interface \"%s\"\n",
1213
if_entry->d_name);
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1214
1193
}
1215
1194
return 0;
1216
1195
}
1234
1213
struct ifreq ifr;
1235
1214
if(not get_flags(if_entry->d_name, &ifr)){
1236
1215
if(debug){
1237
fprintf(stderr, "Mandos plugin mandos-client: "
1238
"Failed to get flags for interface \"%s\"\n",
1239
if_entry->d_name);
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1240
1218
}
1241
1219
return 0;
1242
1220
}
1244
1222
/* Reject down interfaces */
1245
1223
if(not (ifr.ifr_flags & IFF_UP)){
1246
1224
if(debug){
1247
fprintf(stderr, "Mandos plugin mandos-client: "
1248
"Rejecting down interface \"%s\"\n",
1249
if_entry->d_name);
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1250
1227
}
1251
1228
return 0;
1252
1229
}
1254
1231
/* Reject non-running interfaces */
1255
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1256
1233
if(debug){
1257
fprintf(stderr, "Mandos plugin mandos-client: "
1258
"Rejecting non-running interface \"%s\"\n",
1259
if_entry->d_name);
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1260
1236
}
1261
1237
return 0;
1262
1238
}
1281
1257
/* Is this directory entry a runnable program? */
1282
1258
int runnable_hook(const struct dirent *direntry){
1283
1259
int ret;
1260
size_t sret;
1284
1261
struct stat st;
1285
1262
1286
1263
if((direntry->d_name)[0] == '\0'){
1288
1265
return 0;
1289
1266
}
1290
1267
1291
/* Save pointer to last character */
1292
char *end = strchr(direntry->d_name, '\0')-1;
1293
1294
if(*end == '~'){
1295
/* Backup name~ */
1296
return 0;
1297
}
1298
1299
if(((direntry->d_name)[0] == '#')
1300
and (*end == '#')){
1301
/* Temporary #name# */
1302
return 0;
1303
}
1304
1305
/* XXX more rules here */
1306
1307
ret = stat(direntry->d_name, &st);
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);
1308
1289
if(ret == -1){
1309
1290
if(debug){
1310
perror_plus("Could not stat plugin");
1291
perror_plus("Could not stat hook");
1311
1292
}
1312
1293
return 0;
1313
1294
}
1314
1295
if(not (S_ISREG(st.st_mode))){
1315
1296
/* Not a regular file */
1297
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1300
}
1316
1301
return 0;
1317
1302
}
1318
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1319
1304
/* Not executable */
1305
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1308
}
1320
1309
return 0;
1321
1310
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1322
1315
return 1;
1323
1316
}
1324
1317
1331
1324
while(true){
1332
1325
if(mc.current_server == NULL){
1333
1326
if (debug){
1334
fprintf(stderr, "Mandos plugin mandos-client: "
1335
"Wait until first server is found. No timeout!\n");
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1336
1329
}
1337
1330
ret = avahi_simple_poll_iterate(s, -1);
1338
1331
} else {
1339
1332
if (debug){
1340
fprintf(stderr, "Mandos plugin mandos-client: "
1341
"Check current_server if we should run it,"
1342
" or wait\n");
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1343
1335
}
1344
1336
/* the current time */
1345
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1361
1353
- ((intmax_t)waited_time.tv_nsec / 1000000));
1362
1354
1363
1355
if (debug){
1364
fprintf(stderr, "Mandos plugin mandos-client: "
1365
"Blocking for %" PRIdMAX " ms\n", block_time);
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1366
1358
}
1367
1359
1368
1360
if(block_time <= 0){
1395
1387
}
1396
1388
}
1397
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
1398
1526
int main(int argc, char *argv[]){
1399
1527
AvahiSServiceBrowser *sb = NULL;
1400
1528
int error;
1480
1608
.group = 2 },
1481
1609
{ .name = "retry", .key = 132,
1482
1610
.arg = "SECONDS",
1483
.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",
1484
1616
.group = 2 },
1485
1617
/*
1486
1618
* These reproduce what we would get without ARGP_NO_HELP
1540
1672
argp_error(state, "Bad retry interval");
1541
1673
}
1542
1674
break;
1675
case 133: /* --network-hook-dir */
1676
hookdir = arg;
1677
break;
1543
1678
/*
1544
1679
* These reproduce what we would get without ARGP_NO_HELP
1545
1680
*/
1551
1686
argp_state_help(state, state->out_stream,
1552
1687
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1553
1688
case 'V': /* --version */
1554
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1555
fprintf(state->out_stream, "%s\n", argp_program_version);
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1556
1690
exit(argp_err_exit_status);
1557
1691
break;
1558
1692
default:
1585
1719
{
1586
1720
/* Work around Debian bug #633582:
1587
1721
<http://bugs.debian.org/633582> */
1588
struct stat st;
1589
1722
1590
1723
/* Re-raise priviliges */
1591
1724
errno = 0;
1592
1725
ret = seteuid(0);
1593
1726
if(ret == -1){
1594
1727
perror_plus("seteuid");
1595
}
1596
1597
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1598
int seckey_fd = open(seckey, O_RDONLY);
1599
if(seckey_fd == -1){
1600
perror_plus("open");
1601
} else {
1602
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1603
if(ret == -1){
1604
perror_plus("fstat");
1605
} else {
1606
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1607
ret = fchown(seckey_fd, uid, gid);
1608
if(ret == -1){
1609
perror_plus("fchown");
1610
}
1611
}
1612
}
1613
TEMP_FAILURE_RETRY(close(seckey_fd));
1614
}
1615
}
1616
1617
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1618
int pubkey_fd = open(pubkey, O_RDONLY);
1619
if(pubkey_fd == -1){
1620
perror_plus("open");
1621
} else {
1622
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1623
if(ret == -1){
1624
perror_plus("fstat");
1625
} else {
1626
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1627
ret = fchown(pubkey_fd, uid, gid);
1628
if(ret == -1){
1629
perror_plus("fchown");
1630
}
1631
}
1632
}
1633
TEMP_FAILURE_RETRY(close(pubkey_fd));
1634
}
1635
}
1636
1637
/* Lower privileges */
1638
errno = 0;
1639
ret = seteuid(uid);
1640
if(ret == -1){
1641
perror_plus("seteuid");
1642
}
1643
}
1644
1645
/* Find network hooks and run them */
1646
{
1647
struct dirent **direntries;
1648
struct dirent *direntry;
1649
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1650
alphasort);
1651
if(numhooks == -1){
1652
perror_plus("scandir");
1653
1728
} else {
1654
int devnull = open("/dev/null", O_RDONLY);
1655
for(int i = 0; i < numhooks; i++){
1656
direntry = direntries[0];
1657
char *fullname = NULL;
1658
ret = asprintf(&fullname, "%s/%s", tempdir,
1659
direntry->d_name);
1660
if(ret < 0){
1661
perror_plus("asprintf");
1662
continue;
1663
}
1664
pid_t hook_pid = fork();
1665
if(hook_pid == 0){
1666
/* Child */
1667
dup2(devnull, STDIN_FILENO);
1668
close(devnull);
1669
dup2(STDERR_FILENO, STDOUT_FILENO);
1670
ret = setenv("DEVICE", interface, 1);
1671
if(ret == -1){
1672
perror_plus("setenv");
1673
exit(1);
1674
}
1675
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1676
if(ret == -1){
1677
perror_plus("setenv");
1678
exit(1);
1679
}
1680
ret = setenv("MODE", "start", 1);
1681
if(ret == -1){
1682
perror_plus("setenv");
1683
exit(1);
1684
}
1685
char *delaystring;
1686
ret = asprintf(&delaystring, "%f", delay);
1687
if(ret == -1){
1688
perror_plus("asprintf");
1689
exit(1);
1690
}
1691
ret = setenv("DELAY", delaystring, 1);
1692
if(ret == -1){
1693
free(delaystring);
1694
perror_plus("setenv");
1695
exit(1);
1696
}
1697
free(delaystring);
1698
ret = execl(fullname, direntry->d_name, "start", NULL);
1699
perror_plus("execl");
1700
} else {
1701
int status;
1702
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1703
perror_plus("waitpid");
1704
free(fullname);
1705
continue;
1706
}
1707
if(WIFEXITED(status)){
1708
if(WEXITSTATUS(status) != 0){
1709
fprintf(stderr, "Mandos plugin mandos-client: "
1710
"Warning: network hook \"%s\" exited"
1711
" with status %d\n", direntry->d_name,
1712
WEXITSTATUS(status));
1713
free(fullname);
1714
continue;
1715
}
1716
} else if(WIFSIGNALED(status)){
1717
fprintf(stderr, "Mandos plugin mandos-client: "
1718
"Warning: network hook \"%s\" died by"
1719
" signal %d\n", direntry->d_name,
1720
WTERMSIG(status));
1721
free(fullname);
1722
continue;
1723
} else {
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" crashed\n",
1726
direntry->d_name);
1727
free(fullname);
1728
continue;
1729
}
1730
}
1731
free(fullname);
1732
if(quit_now){
1733
goto end;
1734
}
1735
}
1736
close(devnull);
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
}
1737
1779
}
1738
1780
}
1739
1781
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1785
}
1786
1740
1787
if(not debug){
1741
1788
avahi_set_log_function(empty_log);
1742
1789
}
1756
1803
/* Pick the first interface returned */
1757
1804
interface = strdup(direntries[0]->d_name);
1758
1805
if(debug){
1759
fprintf(stderr, "Mandos plugin mandos-client: "
1760
"Using interface \"%s\"\n", interface);
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1761
1807
}
1762
1808
if(interface == NULL){
1763
1809
perror_plus("malloc");
1768
1814
free(direntries);
1769
1815
} else {
1770
1816
free(direntries);
1771
fprintf(stderr, "Mandos plugin mandos-client: "
1772
"Could not find a network interface\n");
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1773
1818
exitcode = EXIT_FAILURE;
1774
1819
goto end;
1775
1820
}
1781
1826
srand((unsigned int) time(NULL));
1782
1827
mc.simple_poll = avahi_simple_poll_new();
1783
1828
if(mc.simple_poll == NULL){
1784
fprintf(stderr, "Mandos plugin mandos-client: "
1785
"Avahi: Failed to create simple poll object.\n");
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1786
1831
exitcode = EX_UNAVAILABLE;
1787
1832
goto end;
1788
1833
}
1854
1899
if(strcmp(interface, "none") != 0){
1855
1900
if_index = (AvahiIfIndex) if_nametoindex(interface);
1856
1901
if(if_index == 0){
1857
fprintf(stderr, "Mandos plugin mandos-client: "
1858
"No such interface: \"%s\"\n", interface);
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1859
1903
exitcode = EX_UNAVAILABLE;
1860
1904
goto end;
1861
1905
}
1981
2025
#endif /* __linux__ */
1982
2026
/* Lower privileges */
1983
2027
errno = 0;
1984
if(take_down_interface){
1985
/* Lower privileges */
1986
ret = seteuid(uid);
1987
if(ret == -1){
1988
perror_plus("seteuid");
1989
}
1990
} else {
1991
/* Lower privileges permanently */
1992
ret = setuid(uid);
1993
if(ret == -1){
1994
perror_plus("setuid");
1995
}
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
1996
2032
}
1997
2033
}
1998
2034
2002
2038
2003
2039
ret = init_gnutls_global(pubkey, seckey);
2004
2040
if(ret == -1){
2005
fprintf(stderr, "Mandos plugin mandos-client: "
2006
"init_gnutls_global failed\n");
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
2007
2042
exitcode = EX_UNAVAILABLE;
2008
2043
goto end;
2009
2044
} else {
2025
2060
}
2026
2061
2027
2062
if(not init_gpgme(pubkey, seckey, tempdir)){
2028
fprintf(stderr, "Mandos plugin mandos-client: "
2029
"init_gpgme failed\n");
2063
fprintf_plus(stderr, "init_gpgme failed\n");
2030
2064
exitcode = EX_UNAVAILABLE;
2031
2065
goto end;
2032
2066
} else {
2042
2076
/* (Mainly meant for debugging) */
2043
2077
char *address = strrchr(connect_to, ':');
2044
2078
if(address == NULL){
2045
fprintf(stderr, "Mandos plugin mandos-client: "
2046
"No colon in address\n");
2079
fprintf_plus(stderr, "No colon in address\n");
2047
2080
exitcode = EX_USAGE;
2048
2081
goto end;
2049
2082
}
2057
2090
tmpmax = strtoimax(address+1, &tmp, 10);
2058
2091
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2059
2092
or tmpmax != (uint16_t)tmpmax){
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"Bad port number\n");
2093
fprintf_plus(stderr, "Bad port number\n");
2062
2094
exitcode = EX_USAGE;
2063
2095
goto end;
2064
2096
}
2094
2126
break;
2095
2127
}
2096
2128
if(debug){
2097
fprintf(stderr, "Mandos plugin mandos-client: "
2098
"Retrying in %d seconds\n", (int)retry_interval);
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2099
2131
}
2100
2132
sleep((int)retry_interval);
2101
2133
}
2131
2163
2132
2164
/* Check if creating the Avahi server object succeeded */
2133
2165
if(mc.server == NULL){
2134
fprintf(stderr, "Mandos plugin mandos-client: "
2135
"Failed to create Avahi server: %s\n",
2136
avahi_strerror(error));
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
2137
2168
exitcode = EX_UNAVAILABLE;
2138
2169
goto end;
2139
2170
}
2147
2178
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2148
2179
NULL, 0, browse_callback, NULL);
2149
2180
if(sb == NULL){
2150
fprintf(stderr, "Mandos plugin mandos-client: "
2151
"Failed to create service browser: %s\n",
2152
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)));
2153
2183
exitcode = EX_UNAVAILABLE;
2154
2184
goto end;
2155
2185
}
2161
2191
/* Run the main loop */
2162
2192
2163
2193
if(debug){
2164
fprintf(stderr, "Mandos plugin mandos-client: "
2165
"Starting Avahi loop search\n");
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2166
2195
}
2167
2196
2168
2197
ret = avahi_loop_with_timeout(mc.simple_poll,
2169
2198
(int)(retry_interval * 1000));
2170
2199
if(debug){
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"avahi_loop_with_timeout exited %s\n",
2173
(ret == 0) ? "successfully" : "with error");
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(ret == 0) ? "successfully" : "with error");
2174
2202
}
2175
2203
2176
2204
end:
2177
2205
2178
2206
if(debug){
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"%s exiting\n", argv[0]);
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2181
2208
}
2182
2209
2183
2210
/* Cleanup things */
2199
2226
if(gpgme_initialized){
2200
2227
gpgme_release(mc.ctx);
2201
2228
}
2202
2229
2203
2230
/* Cleans up the circular linked list of Mandos servers the client
2204
2231
has seen */
2205
2232
if(mc.current_server != NULL){
2211
2238
}
2212
2239
}
2213
2240
2214
/* XXX run network hooks "stop" here */
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2215
2243
2216
/* Take down the network interface */
2217
if(take_down_interface){
2218
/* Re-raise priviliges */
2244
/* Re-raise priviliges */
2245
{
2219
2246
errno = 0;
2220
2247
ret = seteuid(0);
2221
2248
if(ret == -1){
2222
2249
perror_plus("seteuid");
2223
2250
}
2224
if(geteuid() == 0){
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2225
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2226
2255
if(ret == -1){
2227
2256
perror_plus("ioctl SIOCGIFFLAGS");
2236
2265
if(ret == -1){
2237
2266
perror_plus("close");
2238
2267
}
2239
/* Lower privileges permanently */
2240
errno = 0;
2241
ret = setuid(uid);
2242
if(ret == -1){
2243
perror_plus("setuid");
2244
}
2245
2268
}
2246
2269
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2247
2276
2248
2277
/* Removes the GPGME temp directory and all files inside */
2249
2278
if(tempdir_created){
2263
2292
}
2264
2293
ret = remove(fullname);
2265
2294
if(ret == -1){
2266
fprintf(stderr, "Mandos plugin mandos-client: "
2267
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
2268
2297
}
2269
2298
free(fullname);
2270
2299
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0