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- Committer: teddy at bsnet
- Date: 2011-11-13 20:49:21 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111113204921-vbnwtmuq01isvgsc
* initramfs-tools-hook: Install network hooks (and any required files)
in the initramfs image.
* plugins.d/mandos-client.c (main): Also set MANDOSNETHOOKDIR for
network hooks.
* plugins.d/mandos-client.xml (OPTIONS): Use <filename
class="directory">, not
<directory>.
in the initramfs image.
* plugins.d/mandos-client.c (main): Also set MANDOSNETHOOKDIR for
network hooks.
* plugins.d/mandos-client.xml (OPTIONS): Use <filename
class="directory">, not
<directory>.
- files added:
- DBUS-API
- debian/source
- files removed:
- plugins.d/plymouth
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 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
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.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() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
69
70
if_nametoindex(), IF_NAMESIZE */
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
84
85
raise() */
85
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
87
90
88
91
#ifdef __linux__
89
92
#include <sys/klog.h> /* klogctl() */
107
110
init_gnutls_session(),
108
111
GNUTLS_* */
109
112
#include <gnutls/openpgp.h>
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
112
115
113
116
/* GPGME */
114
117
#include <gpgme.h> /* All GPGME types, constants and
122
125
#define PATHDIR "/conf/conf.d/mandos"
123
126
#define SECKEY "seckey.txt"
124
127
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
125
129
126
130
bool debug = false;
127
131
static const char mandos_protocol_version[] = "1";
128
132
const char *argp_program_version = "mandos-client " VERSION;
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
134
static const char sys_class_net[] = "/sys/class/net";
135
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
138
/* Doubly linked list that need to be circularly linked when used */
139
typedef struct server{
140
const char *ip;
141
uint16_t port;
142
AvahiIfIndex if_index;
143
int af;
144
struct timespec last_seen;
145
struct server *next;
146
struct server *prev;
147
} server;
130
148
131
149
/* Used for passing in values through the Avahi callback functions */
132
150
typedef struct {
137
155
gnutls_dh_params_t dh_params;
138
156
const char *priority;
139
157
gpgme_ctx_t ctx;
158
server *current_server;
140
159
} mandos_context;
141
160
142
161
/* global context so signal handler can reach it*/
143
162
mandos_context mc = { .simple_poll = NULL, .server = NULL,
144
163
.dh_bits = 1024, .priority = "SECURE256"
145
":!CTYPE-X.509:+CTYPE-OPENPGP" };
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
146
166
147
167
sig_atomic_t quit_now = 0;
148
168
int signal_received = 0;
149
169
170
/* Function to use when printing errors */
171
void perror_plus(const char *print_text){
172
fprintf(stderr, "Mandos plugin %s: ",
173
program_invocation_short_name);
174
perror(print_text);
175
}
176
150
177
/*
151
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
152
179
* bytes. "buffer_capacity" is how much is currently allocated,
153
180
* "buffer_length" is how much is already used.
154
181
*/
155
182
size_t incbuffer(char **buffer, size_t buffer_length,
156
size_t buffer_capacity){
183
size_t buffer_capacity){
157
184
if(buffer_length + BUFFER_SIZE > buffer_capacity){
158
185
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
159
186
if(buffer == NULL){
164
191
return buffer_capacity;
165
192
}
166
193
194
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
197
int ret;
198
server *new_server = malloc(sizeof(server));
199
if(new_server == NULL){
200
perror_plus("malloc");
201
return -1;
202
}
203
*new_server = (server){ .ip = strdup(ip),
204
.port = port,
205
.if_index = if_index,
206
.af = af };
207
if(new_server->ip == NULL){
208
perror_plus("strdup");
209
return -1;
210
}
211
/* Special case of first server */
212
if (mc.current_server == NULL){
213
new_server->next = new_server;
214
new_server->prev = new_server;
215
mc.current_server = new_server;
216
/* Place the new server last in the list */
217
} else {
218
new_server->next = mc.current_server;
219
new_server->prev = mc.current_server->prev;
220
new_server->prev->next = new_server;
221
mc.current_server->prev = new_server;
222
}
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
224
if(ret == -1){
225
perror_plus("clock_gettime");
226
return -1;
227
}
228
return 0;
229
}
230
167
231
/*
168
232
* Initialize GPGME.
169
233
*/
170
static bool init_gpgme(const char *seckey,
171
const char *pubkey, const char *tempdir){
234
static bool init_gpgme(const char *seckey, const char *pubkey,
235
const char *tempdir){
172
236
gpgme_error_t rc;
173
237
gpgme_engine_info_t engine_info;
174
238
183
247
184
248
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
185
249
if(fd == -1){
186
perror("open");
250
perror_plus("open");
187
251
return false;
188
252
}
189
253
190
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
191
255
if(rc != GPG_ERR_NO_ERROR){
192
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
193
258
gpgme_strsource(rc), gpgme_strerror(rc));
194
259
return false;
195
260
}
196
261
197
262
rc = gpgme_op_import(mc.ctx, pgp_data);
198
263
if(rc != GPG_ERR_NO_ERROR){
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
200
266
gpgme_strsource(rc), gpgme_strerror(rc));
201
267
return false;
202
268
}
203
269
204
270
ret = (int)TEMP_FAILURE_RETRY(close(fd));
205
271
if(ret == -1){
206
perror("close");
272
perror_plus("close");
207
273
}
208
274
gpgme_data_release(pgp_data);
209
275
return true;
210
276
}
211
277
212
278
if(debug){
213
fprintf(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
214
281
}
215
282
216
283
/* Init GPGME */
217
284
gpgme_check_version(NULL);
218
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
219
286
if(rc != GPG_ERR_NO_ERROR){
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
221
289
gpgme_strsource(rc), gpgme_strerror(rc));
222
290
return false;
223
291
}
224
292
225
/* Set GPGME home directory for the OpenPGP engine only */
293
/* Set GPGME home directory for the OpenPGP engine only */
226
294
rc = gpgme_get_engine_info(&engine_info);
227
295
if(rc != GPG_ERR_NO_ERROR){
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
229
298
gpgme_strsource(rc), gpgme_strerror(rc));
230
299
return false;
231
300
}
238
307
engine_info = engine_info->next;
239
308
}
240
309
if(engine_info == NULL){
241
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
242
312
return false;
243
313
}
244
314
245
315
/* Create new GPGME "context" */
246
316
rc = gpgme_new(&(mc.ctx));
247
317
if(rc != GPG_ERR_NO_ERROR){
248
fprintf(stderr, "bad gpgme_new: %s: %s\n",
249
gpgme_strsource(rc), gpgme_strerror(rc));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
250
321
return false;
251
322
}
252
323
271
342
ssize_t plaintext_length = 0;
272
343
273
344
if(debug){
274
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
275
347
}
276
348
277
349
/* Create new GPGME data buffer from memory cryptotext */
278
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
279
351
0);
280
352
if(rc != GPG_ERR_NO_ERROR){
281
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
282
355
gpgme_strsource(rc), gpgme_strerror(rc));
283
356
return -1;
284
357
}
286
359
/* Create new empty GPGME data buffer for the plaintext */
287
360
rc = gpgme_data_new(&dh_plain);
288
361
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
290
364
gpgme_strsource(rc), gpgme_strerror(rc));
291
365
gpgme_data_release(dh_crypto);
292
366
return -1;
296
370
data buffer */
297
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
298
372
if(rc != GPG_ERR_NO_ERROR){
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
300
375
gpgme_strsource(rc), gpgme_strerror(rc));
301
376
plaintext_length = -1;
302
377
if(debug){
303
378
gpgme_decrypt_result_t result;
304
379
result = gpgme_op_decrypt_result(mc.ctx);
305
380
if(result == NULL){
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
307
383
} else {
308
fprintf(stderr, "Unsupported algorithm: %s\n",
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
309
386
result->unsupported_algorithm);
310
fprintf(stderr, "Wrong key usage: %u\n",
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
311
389
result->wrong_key_usage);
312
390
if(result->file_name != NULL){
313
fprintf(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
314
393
}
315
394
gpgme_recipient_t recipient;
316
395
recipient = result->recipients;
317
396
while(recipient != NULL){
318
fprintf(stderr, "Public key algorithm: %s\n",
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
319
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
320
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
321
fprintf(stderr, "Secret key available: %s\n",
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",
322
404
recipient->status == GPG_ERR_NO_SECKEY
323
405
? "No" : "Yes");
324
406
recipient = recipient->next;
329
411
}
330
412
331
413
if(debug){
332
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
333
416
}
334
417
335
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
336
419
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
337
perror("gpgme_data_seek");
420
perror_plus("gpgme_data_seek");
338
421
plaintext_length = -1;
339
422
goto decrypt_end;
340
423
}
342
425
*plaintext = NULL;
343
426
while(true){
344
427
plaintext_capacity = incbuffer(plaintext,
345
(size_t)plaintext_length,
346
plaintext_capacity);
428
(size_t)plaintext_length,
429
plaintext_capacity);
347
430
if(plaintext_capacity == 0){
348
perror("incbuffer");
349
plaintext_length = -1;
350
goto decrypt_end;
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
351
434
}
352
435
353
436
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
358
441
break;
359
442
}
360
443
if(ret < 0){
361
perror("gpgme_data_read");
444
perror_plus("gpgme_data_read");
362
445
plaintext_length = -1;
363
446
goto decrypt_end;
364
447
}
366
449
}
367
450
368
451
if(debug){
369
fprintf(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
370
454
for(ssize_t i = 0; i < plaintext_length; i++){
371
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
372
456
}
394
478
/* GnuTLS log function callback */
395
479
static void debuggnutls(__attribute__((unused)) int level,
396
480
const char* string){
397
fprintf(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
398
482
}
399
483
400
484
static int init_gnutls_global(const char *pubkeyfilename,
402
486
int ret;
403
487
404
488
if(debug){
405
fprintf(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
406
491
}
407
492
408
493
ret = gnutls_global_init();
409
494
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS global_init: %s\n",
411
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
412
497
return -1;
413
498
}
414
499
421
506
}
422
507
423
508
/* OpenPGP credentials */
424
gnutls_certificate_allocate_credentials(&mc.cred);
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
425
510
if(ret != GNUTLS_E_SUCCESS){
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
427
from
428
-Wunreachable-code
429
*/
430
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
431
513
gnutls_global_deinit();
432
514
return -1;
433
515
}
434
516
435
517
if(debug){
436
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
437
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
438
521
seckeyfilename);
439
522
}
443
526
GNUTLS_OPENPGP_FMT_BASE64);
444
527
if(ret != GNUTLS_E_SUCCESS){
445
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
446
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
447
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
448
fprintf(stderr, "The GnuTLS error is: %s\n",
449
safer_gnutls_strerror(ret));
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
450
534
goto globalfail;
451
535
}
452
536
453
537
/* GnuTLS server initialization */
454
538
ret = gnutls_dh_params_init(&mc.dh_params);
455
539
if(ret != GNUTLS_E_SUCCESS){
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
457
542
" %s\n", safer_gnutls_strerror(ret));
458
543
goto globalfail;
459
544
}
460
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
461
546
if(ret != GNUTLS_E_SUCCESS){
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
463
549
safer_gnutls_strerror(ret));
464
550
goto globalfail;
465
551
}
486
572
}
487
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
488
574
if(ret != GNUTLS_E_SUCCESS){
489
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
490
577
safer_gnutls_strerror(ret));
491
578
}
492
579
500
587
}
501
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
502
589
if(ret != GNUTLS_E_SUCCESS){
503
fprintf(stderr, "Syntax error at: %s\n", err);
504
fprintf(stderr, "GnuTLS error: %s\n",
505
safer_gnutls_strerror(ret));
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));
506
594
gnutls_deinit(*session);
507
595
return -1;
508
596
}
517
605
}
518
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
519
607
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
521
610
safer_gnutls_strerror(ret));
522
611
gnutls_deinit(*session);
523
612
return -1;
569
658
pf = PF_INET;
570
659
break;
571
660
default:
572
fprintf(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
573
663
errno = EINVAL;
574
664
return -1;
575
665
}
580
670
}
581
671
582
672
if(debug){
583
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
584
675
"\n", ip, port);
585
676
}
586
677
587
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
588
679
if(tcp_sd < 0){
589
680
int e = errno;
590
perror("socket");
681
perror_plus("socket");
591
682
errno = e;
592
683
goto mandos_end;
593
684
}
607
698
}
608
699
if(ret < 0 ){
609
700
int e = errno;
610
perror("inet_pton");
701
perror_plus("inet_pton");
611
702
errno = e;
612
703
goto mandos_end;
613
704
}
614
705
if(ret == 0){
615
706
int e = errno;
616
fprintf(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
617
709
errno = e;
618
710
goto mandos_end;
619
711
}
624
716
625
717
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
626
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
627
-Wunreachable-code*/
719
-Wunreachable-code*/
628
720
if(if_index == AVAHI_IF_UNSPEC){
629
fprintf(stderr, "An IPv6 link-local address is incomplete"
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
630
723
" without a network interface\n");
631
724
errno = EINVAL;
632
725
goto mandos_end;
649
742
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
650
743
char interface[IF_NAMESIZE];
651
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
652
perror("if_indextoname");
745
perror_plus("if_indextoname");
653
746
} else {
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
655
749
ip, interface, port);
656
750
}
657
751
} else {
658
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
659
port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
660
754
}
661
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
662
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
669
763
sizeof(addrstr));
670
764
}
671
765
if(pcret == NULL){
672
perror("inet_ntop");
766
perror_plus("inet_ntop");
673
767
} else {
674
768
if(strcmp(addrstr, ip) != 0){
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
676
771
}
677
772
}
678
773
}
688
783
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
784
}
690
785
if(ret < 0){
691
int e = errno;
692
perror("connect");
693
errno = e;
786
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
787
int e = errno;
788
perror_plus("connect");
789
errno = e;
790
}
694
791
goto mandos_end;
695
792
}
696
793
704
801
while(true){
705
802
size_t out_size = strlen(out);
706
803
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
707
out_size - written));
804
out_size - written));
708
805
if(ret == -1){
709
806
int e = errno;
710
perror("write");
807
perror_plus("write");
711
808
errno = e;
712
809
goto mandos_end;
713
810
}
730
827
}
731
828
732
829
if(debug){
733
fprintf(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
734
832
}
735
833
736
834
if(quit_now){
738
836
goto mandos_end;
739
837
}
740
838
839
/* Spurious warning from -Wint-to-pointer-cast */
741
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
742
841
743
842
if(quit_now){
755
854
756
855
if(ret != GNUTLS_E_SUCCESS){
757
856
if(debug){
758
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
759
859
gnutls_perror(ret);
760
860
}
761
861
errno = EPROTO;
765
865
/* Read OpenPGP packet that contains the wanted password */
766
866
767
867
if(debug){
768
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
769
ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
770
870
}
771
871
772
872
while(true){
777
877
}
778
878
779
879
buffer_capacity = incbuffer(&buffer, buffer_length,
780
buffer_capacity);
880
buffer_capacity);
781
881
if(buffer_capacity == 0){
782
882
int e = errno;
783
perror("incbuffer");
883
perror_plus("incbuffer");
784
884
errno = e;
785
885
goto mandos_end;
786
886
}
810
910
}
811
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
812
912
if(ret < 0){
813
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
814
915
gnutls_perror(ret);
815
916
errno = EPROTO;
816
917
goto mandos_end;
817
918
}
818
919
break;
819
920
default:
820
fprintf(stderr, "Unknown error while reading data from"
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
821
923
" encrypted session with Mandos server\n");
822
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
823
925
errno = EIO;
829
931
}
830
932
831
933
if(debug){
832
fprintf(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
833
936
}
834
937
835
938
if(quit_now){
847
950
848
951
if(buffer_length > 0){
849
952
ssize_t decrypted_buffer_size;
850
decrypted_buffer_size = pgp_packet_decrypt(buffer,
851
buffer_length,
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
954
&decrypted_buffer);
853
955
if(decrypted_buffer_size >= 0){
854
956
865
967
if(ret == 0 and ferror(stdout)){
866
968
int e = errno;
867
969
if(debug){
868
fprintf(stderr, "Error writing encrypted data: %s\n",
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
869
972
strerror(errno));
870
973
}
871
974
errno = e;
891
994
if(e == 0){
892
995
e = errno;
893
996
}
894
perror("close");
997
perror_plus("close");
895
998
}
896
999
gnutls_deinit(session);
1000
errno = e;
897
1001
if(quit_now){
898
e = EINTR;
1002
errno = EINTR;
899
1003
retval = -1;
900
1004
}
901
errno = e;
902
1005
}
903
1006
return retval;
904
1007
}
929
1032
switch(event){
930
1033
default:
931
1034
case AVAHI_RESOLVER_FAILURE:
932
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
933
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
934
1038
avahi_strerror(avahi_server_errno(mc.server)));
935
1039
break;
939
1043
char ip[AVAHI_ADDRESS_STR_MAX];
940
1044
avahi_address_snprint(ip, sizeof(ip), address);
941
1045
if(debug){
942
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
943
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
944
1049
ip, (intmax_t)interface, port);
945
1050
}
947
1052
avahi_proto_to_af(proto));
948
1053
if(ret == 0){
949
1054
avahi_simple_poll_quit(mc.simple_poll);
1055
} else {
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
950
1058
}
951
1059
}
952
1060
}
976
1084
default:
977
1085
case AVAHI_BROWSER_FAILURE:
978
1086
979
fprintf(stderr, "(Avahi browser) %s\n",
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
980
1089
avahi_strerror(avahi_server_errno(mc.server)));
981
1090
avahi_simple_poll_quit(mc.simple_poll);
982
1091
return;
990
1099
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
991
1100
name, type, domain, protocol, 0,
992
1101
resolve_callback, NULL) == NULL)
993
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
994
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
995
1105
break;
996
1106
1000
1110
case AVAHI_BROWSER_ALL_FOR_NOW:
1001
1111
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1002
1112
if(debug){
1003
fprintf(stderr, "No Mandos server found, still searching...\n");
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1004
1115
}
1005
1116
break;
1006
1117
}
1007
1118
}
1008
1119
1009
/* stop main loop after sigterm has been called */
1120
/* Signal handler that stops main loop after SIGTERM */
1010
1121
static void handle_sigterm(int sig){
1011
1122
if(quit_now){
1012
1123
return;
1014
1125
quit_now = 1;
1015
1126
signal_received = sig;
1016
1127
int old_errno = errno;
1128
/* set main loop to exit */
1017
1129
if(mc.simple_poll != NULL){
1018
1130
avahi_simple_poll_quit(mc.simple_poll);
1019
1131
}
1020
1132
errno = old_errno;
1021
1133
}
1022
1134
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1136
int ret;
1137
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1139
if(s < 0){
1140
perror_plus("socket");
1141
return false;
1142
}
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
if(ret == -1){
1146
if(debug){
1147
perror_plus("ioctl SIOCGIFFLAGS");
1148
}
1149
return false;
1150
}
1151
return true;
1152
}
1153
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1156
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1158
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1161
}
1162
return false;
1163
}
1164
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1166
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1169
}
1170
return true;
1171
}
1172
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1174
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1177
}
1178
return false;
1179
}
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1182
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1185
}
1186
return false;
1187
}
1188
1189
/* Accept this device */
1190
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1193
}
1194
return true;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int good_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1265
}
1266
return 1;
1267
}
1268
1269
int notdotentries(const struct dirent *direntry){
1270
/* Skip "." and ".." */
1271
if(direntry->d_name[0] == '.'
1272
and (direntry->d_name[1] == '\0'
1273
or (direntry->d_name[1] == '.'
1274
and direntry->d_name[2] == '\0'))){
1275
return 0;
1276
}
1277
return 1;
1278
}
1279
1280
/* Is this directory entry a runnable program? */
1281
int runnable_hook(const struct dirent *direntry){
1282
int ret;
1283
size_t sret;
1284
struct stat st;
1285
1286
if((direntry->d_name)[0] == '\0'){
1287
/* Empty name? */
1288
return 0;
1289
}
1290
1291
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1292
"abcdefghijklmnopqrstuvwxyz"
1293
"0123456789"
1294
"_-");
1295
if((direntry->d_name)[sret] != '\0'){
1296
/* Contains non-allowed characters */
1297
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
1305
char *fullname = NULL;
1306
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1307
if(ret < 0){
1308
perror_plus("asprintf");
1309
return 0;
1310
}
1311
1312
ret = stat(fullname, &st);
1313
if(ret == -1){
1314
if(debug){
1315
perror_plus("Could not stat hook");
1316
}
1317
return 0;
1318
}
1319
if(not (S_ISREG(st.st_mode))){
1320
/* Not a regular file */
1321
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1325
}
1326
return 0;
1327
}
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
/* Not executable */
1330
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1334
}
1335
return 0;
1336
}
1337
return 1;
1338
}
1339
1340
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1341
int ret;
1342
struct timespec now;
1343
struct timespec waited_time;
1344
intmax_t block_time;
1345
1346
while(true){
1347
if(mc.current_server == NULL){
1348
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1351
}
1352
ret = avahi_simple_poll_iterate(s, -1);
1353
} else {
1354
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1358
}
1359
/* the current time */
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1361
if(ret == -1){
1362
perror_plus("clock_gettime");
1363
return -1;
1364
}
1365
/* Calculating in ms how long time between now and server
1366
who we visted longest time ago. Now - last seen. */
1367
waited_time.tv_sec = (now.tv_sec
1368
- mc.current_server->last_seen.tv_sec);
1369
waited_time.tv_nsec = (now.tv_nsec
1370
- mc.current_server->last_seen.tv_nsec);
1371
/* total time is 10s/10,000ms.
1372
Converting to s from ms by dividing by 1,000,
1373
and ns to ms by dividing by 1,000,000. */
1374
block_time = ((retry_interval
1375
- ((intmax_t)waited_time.tv_sec * 1000))
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1378
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1381
}
1382
1383
if(block_time <= 0){
1384
ret = start_mandos_communication(mc.current_server->ip,
1385
mc.current_server->port,
1386
mc.current_server->if_index,
1387
mc.current_server->af);
1388
if(ret == 0){
1389
avahi_simple_poll_quit(mc.simple_poll);
1390
return 0;
1391
}
1392
ret = clock_gettime(CLOCK_MONOTONIC,
1393
&mc.current_server->last_seen);
1394
if(ret == -1){
1395
perror_plus("clock_gettime");
1396
return -1;
1397
}
1398
mc.current_server = mc.current_server->next;
1399
block_time = 0; /* Call avahi to find new Mandos
1400
servers, but don't block */
1401
}
1402
1403
ret = avahi_simple_poll_iterate(s, (int)block_time);
1404
}
1405
if(ret != 0){
1406
if (ret > 0 or errno != EINTR){
1407
return (ret != 1) ? ret : 0;
1408
}
1409
}
1410
}
1411
}
1412
1023
1413
int main(int argc, char *argv[]){
1024
1414
AvahiSServiceBrowser *sb = NULL;
1025
1415
int error;
1027
1417
intmax_t tmpmax;
1028
1418
char *tmp;
1029
1419
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1420
const char *interface = "";
1031
1421
struct ifreq network;
1032
1422
int sd = -1;
1033
1423
bool take_down_interface = false;
1034
1424
uid_t uid;
1035
1425
gid_t gid;
1036
char *connect_to = NULL;
1037
1426
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1427
bool tempdir_created = false;
1039
1428
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1043
1432
bool gnutls_initialized = false;
1044
1433
bool gpgme_initialized = false;
1045
1434
float delay = 2.5f;
1435
double retry_interval = 10; /* 10s between trying a server and
1436
retrying the same server again */
1046
1437
1047
1438
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1048
1439
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1054
1445
errno = 0;
1055
1446
ret = setgid(gid);
1056
1447
if(ret == -1){
1057
perror("setgid");
1448
perror_plus("setgid");
1058
1449
}
1059
1450
1060
1451
/* Lower user privileges (temporarily) */
1061
1452
errno = 0;
1062
1453
ret = seteuid(uid);
1063
1454
if(ret == -1){
1064
perror("seteuid");
1455
perror_plus("seteuid");
1065
1456
}
1066
1457
1067
1458
if(quit_now){
1102
1493
.arg = "SECONDS",
1103
1494
.doc = "Maximum delay to wait for interface startup",
1104
1495
.group = 2 },
1496
{ .name = "retry", .key = 132,
1497
.arg = "SECONDS",
1498
.doc = "Retry interval used when denied by the mandos server",
1499
.group = 2 },
1500
{ .name = "network-hook-dir", .key = 133,
1501
.arg = "DIR",
1502
.doc = "Directory where network hooks are located",
1503
.group = 2 },
1105
1504
/*
1106
1505
* These reproduce what we would get without ARGP_NO_HELP
1107
1506
*/
1151
1550
if(errno != 0 or tmp == arg or *tmp != '\0'){
1152
1551
argp_error(state, "Bad delay");
1153
1552
}
1553
case 132: /* --retry */
1554
errno = 0;
1555
retry_interval = strtod(arg, &tmp);
1556
if(errno != 0 or tmp == arg or *tmp != '\0'
1557
or (retry_interval * 1000) > INT_MAX
1558
or retry_interval < 0){
1559
argp_error(state, "Bad retry interval");
1560
}
1561
break;
1562
case 133: /* --network-hook-dir */
1563
hookdir = arg;
1154
1564
break;
1155
1565
/*
1156
1566
* These reproduce what we would get without ARGP_NO_HELP
1163
1573
argp_state_help(state, state->out_stream,
1164
1574
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1165
1575
case 'V': /* --version */
1576
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1166
1577
fprintf(state->out_stream, "%s\n", argp_program_version);
1167
1578
exit(argp_err_exit_status);
1168
1579
break;
1184
1595
case ENOMEM:
1185
1596
default:
1186
1597
errno = ret;
1187
perror("argp_parse");
1598
perror_plus("argp_parse");
1188
1599
exitcode = EX_OSERR;
1189
1600
goto end;
1190
1601
case EINVAL:
1192
1603
goto end;
1193
1604
}
1194
1605
}
1606
1607
{
1608
/* Work around Debian bug #633582:
1609
<http://bugs.debian.org/633582> */
1610
struct stat st;
1611
1612
/* Re-raise priviliges */
1613
errno = 0;
1614
ret = seteuid(0);
1615
if(ret == -1){
1616
perror_plus("seteuid");
1617
}
1618
1619
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1620
int seckey_fd = open(seckey, O_RDONLY);
1621
if(seckey_fd == -1){
1622
perror_plus("open");
1623
} else {
1624
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1625
if(ret == -1){
1626
perror_plus("fstat");
1627
} else {
1628
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1629
ret = fchown(seckey_fd, uid, gid);
1630
if(ret == -1){
1631
perror_plus("fchown");
1632
}
1633
}
1634
}
1635
TEMP_FAILURE_RETRY(close(seckey_fd));
1636
}
1637
}
1638
1639
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1640
int pubkey_fd = open(pubkey, O_RDONLY);
1641
if(pubkey_fd == -1){
1642
perror_plus("open");
1643
} else {
1644
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1645
if(ret == -1){
1646
perror_plus("fstat");
1647
} else {
1648
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1649
ret = fchown(pubkey_fd, uid, gid);
1650
if(ret == -1){
1651
perror_plus("fchown");
1652
}
1653
}
1654
}
1655
TEMP_FAILURE_RETRY(close(pubkey_fd));
1656
}
1657
}
1658
1659
/* Lower privileges */
1660
errno = 0;
1661
ret = seteuid(uid);
1662
if(ret == -1){
1663
perror_plus("seteuid");
1664
}
1665
}
1666
1667
/* Find network hooks and run them */
1668
{
1669
struct dirent **direntries;
1670
struct dirent *direntry;
1671
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1672
alphasort);
1673
if(numhooks == -1){
1674
perror_plus("scandir");
1675
} else {
1676
int devnull = open("/dev/null", O_RDONLY);
1677
for(int i = 0; i < numhooks; i++){
1678
direntry = direntries[0];
1679
char *fullname = NULL;
1680
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1681
if(ret < 0){
1682
perror_plus("asprintf");
1683
continue;
1684
}
1685
pid_t hook_pid = fork();
1686
if(hook_pid == 0){
1687
/* Child */
1688
dup2(devnull, STDIN_FILENO);
1689
close(devnull);
1690
dup2(STDERR_FILENO, STDOUT_FILENO);
1691
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1692
if(ret == -1){
1693
perror_plus("setenv");
1694
exit(1);
1695
}
1696
ret = setenv("DEVICE", interface, 1);
1697
if(ret == -1){
1698
perror_plus("setenv");
1699
exit(1);
1700
}
1701
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1702
if(ret == -1){
1703
perror_plus("setenv");
1704
exit(1);
1705
}
1706
ret = setenv("MODE", "start", 1);
1707
if(ret == -1){
1708
perror_plus("setenv");
1709
exit(1);
1710
}
1711
char *delaystring;
1712
ret = asprintf(&delaystring, "%f", delay);
1713
if(ret == -1){
1714
perror_plus("asprintf");
1715
exit(1);
1716
}
1717
ret = setenv("DELAY", delaystring, 1);
1718
if(ret == -1){
1719
free(delaystring);
1720
perror_plus("setenv");
1721
exit(1);
1722
}
1723
free(delaystring);
1724
ret = execl(fullname, direntry->d_name, "start", NULL);
1725
perror_plus("execl");
1726
} else {
1727
int status;
1728
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1729
perror_plus("waitpid");
1730
free(fullname);
1731
continue;
1732
}
1733
if(WIFEXITED(status)){
1734
if(WEXITSTATUS(status) != 0){
1735
fprintf(stderr, "Mandos plugin mandos-client: "
1736
"Warning: network hook \"%s\" exited"
1737
" with status %d\n", direntry->d_name,
1738
WEXITSTATUS(status));
1739
free(fullname);
1740
continue;
1741
}
1742
} else if(WIFSIGNALED(status)){
1743
fprintf(stderr, "Mandos plugin mandos-client: "
1744
"Warning: network hook \"%s\" died by"
1745
" signal %d\n", direntry->d_name,
1746
WTERMSIG(status));
1747
free(fullname);
1748
continue;
1749
} else {
1750
fprintf(stderr, "Mandos plugin mandos-client: "
1751
"Warning: network hook \"%s\" crashed\n",
1752
direntry->d_name);
1753
free(fullname);
1754
continue;
1755
}
1756
}
1757
free(fullname);
1758
if(quit_now){
1759
goto end;
1760
}
1761
}
1762
close(devnull);
1763
}
1764
}
1195
1765
1196
1766
if(not debug){
1197
1767
avahi_set_log_function(empty_log);
1198
1768
}
1199
1769
1770
if(interface[0] == '\0'){
1771
struct dirent **direntries;
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1774
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
if(ret >= 1){
1782
/* Pick the first interface returned */
1783
interface = strdup(direntries[0]->d_name);
1784
if(debug){
1785
fprintf(stderr, "Mandos plugin mandos-client: "
1786
"Using interface \"%s\"\n", interface);
1787
}
1788
if(interface == NULL){
1789
perror_plus("malloc");
1790
free(direntries);
1791
exitcode = EXIT_FAILURE;
1792
goto end;
1793
}
1794
free(direntries);
1795
} else {
1796
free(direntries);
1797
fprintf(stderr, "Mandos plugin mandos-client: "
1798
"Could not find a network interface\n");
1799
exitcode = EXIT_FAILURE;
1800
goto end;
1801
}
1802
}
1803
1200
1804
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1805
from the signal handler */
1202
1806
/* Initialize the pseudo-RNG for Avahi */
1203
1807
srand((unsigned int) time(NULL));
1204
1808
mc.simple_poll = avahi_simple_poll_new();
1205
1809
if(mc.simple_poll == NULL){
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1810
fprintf(stderr, "Mandos plugin mandos-client: "
1811
"Avahi: Failed to create simple poll object.\n");
1207
1812
exitcode = EX_UNAVAILABLE;
1208
1813
goto end;
1209
1814
}
1211
1816
sigemptyset(&sigterm_action.sa_mask);
1212
1817
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1213
1818
if(ret == -1){
1214
perror("sigaddset");
1819
perror_plus("sigaddset");
1215
1820
exitcode = EX_OSERR;
1216
1821
goto end;
1217
1822
}
1218
1823
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1219
1824
if(ret == -1){
1220
perror("sigaddset");
1825
perror_plus("sigaddset");
1221
1826
exitcode = EX_OSERR;
1222
1827
goto end;
1223
1828
}
1224
1829
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1225
1830
if(ret == -1){
1226
perror("sigaddset");
1831
perror_plus("sigaddset");
1227
1832
exitcode = EX_OSERR;
1228
1833
goto end;
1229
1834
}
1233
1838
*/
1234
1839
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1235
1840
if(ret == -1){
1236
perror("sigaction");
1841
perror_plus("sigaction");
1237
1842
return EX_OSERR;
1238
1843
}
1239
1844
if(old_sigterm_action.sa_handler != SIG_IGN){
1240
1845
ret = sigaction(SIGINT, &sigterm_action, NULL);
1241
1846
if(ret == -1){
1242
perror("sigaction");
1847
perror_plus("sigaction");
1243
1848
exitcode = EX_OSERR;
1244
1849
goto end;
1245
1850
}
1246
1851
}
1247
1852
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1248
1853
if(ret == -1){
1249
perror("sigaction");
1854
perror_plus("sigaction");
1250
1855
return EX_OSERR;
1251
1856
}
1252
1857
if(old_sigterm_action.sa_handler != SIG_IGN){
1253
1858
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1254
1859
if(ret == -1){
1255
perror("sigaction");
1860
perror_plus("sigaction");
1256
1861
exitcode = EX_OSERR;
1257
1862
goto end;
1258
1863
}
1259
1864
}
1260
1865
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1261
1866
if(ret == -1){
1262
perror("sigaction");
1867
perror_plus("sigaction");
1263
1868
return EX_OSERR;
1264
1869
}
1265
1870
if(old_sigterm_action.sa_handler != SIG_IGN){
1266
1871
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1267
1872
if(ret == -1){
1268
perror("sigaction");
1873
perror_plus("sigaction");
1269
1874
exitcode = EX_OSERR;
1270
1875
goto end;
1271
1876
}
1272
1877
}
1273
1878
1274
1879
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1880
if(strcmp(interface, "none") != 0){
1276
1881
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1882
if(if_index == 0){
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1883
fprintf(stderr, "Mandos plugin mandos-client: "
1884
"No such interface: \"%s\"\n", interface);
1279
1885
exitcode = EX_UNAVAILABLE;
1280
1886
goto end;
1281
1887
}
1288
1894
errno = 0;
1289
1895
ret = seteuid(0);
1290
1896
if(ret == -1){
1291
perror("seteuid");
1897
perror_plus("seteuid");
1292
1898
}
1293
1899
1294
1900
#ifdef __linux__
1298
1904
bool restore_loglevel = true;
1299
1905
if(ret == -1){
1300
1906
restore_loglevel = false;
1301
perror("klogctl");
1907
perror_plus("klogctl");
1302
1908
}
1303
1909
#endif /* __linux__ */
1304
1910
1305
1911
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1306
1912
if(sd < 0){
1307
perror("socket");
1913
perror_plus("socket");
1308
1914
exitcode = EX_OSERR;
1309
1915
#ifdef __linux__
1310
1916
if(restore_loglevel){
1311
1917
ret = klogctl(7, NULL, 0);
1312
1918
if(ret == -1){
1313
perror("klogctl");
1919
perror_plus("klogctl");
1314
1920
}
1315
1921
}
1316
1922
#endif /* __linux__ */
1318
1924
errno = 0;
1319
1925
ret = seteuid(uid);
1320
1926
if(ret == -1){
1321
perror("seteuid");
1927
perror_plus("seteuid");
1322
1928
}
1323
1929
goto end;
1324
1930
}
1325
1931
strcpy(network.ifr_name, interface);
1326
1932
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1327
1933
if(ret == -1){
1328
perror("ioctl SIOCGIFFLAGS");
1934
perror_plus("ioctl SIOCGIFFLAGS");
1329
1935
#ifdef __linux__
1330
1936
if(restore_loglevel){
1331
1937
ret = klogctl(7, NULL, 0);
1332
1938
if(ret == -1){
1333
perror("klogctl");
1939
perror_plus("klogctl");
1334
1940
}
1335
1941
}
1336
1942
#endif /* __linux__ */
1339
1945
errno = 0;
1340
1946
ret = seteuid(uid);
1341
1947
if(ret == -1){
1342
perror("seteuid");
1948
perror_plus("seteuid");
1343
1949
}
1344
1950
goto end;
1345
1951
}
1349
1955
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
1956
if(ret == -1){
1351
1957
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1958
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1353
1959
exitcode = EX_OSERR;
1354
1960
#ifdef __linux__
1355
1961
if(restore_loglevel){
1356
1962
ret = klogctl(7, NULL, 0);
1357
1963
if(ret == -1){
1358
perror("klogctl");
1964
perror_plus("klogctl");
1359
1965
}
1360
1966
}
1361
1967
#endif /* __linux__ */
1363
1969
errno = 0;
1364
1970
ret = seteuid(uid);
1365
1971
if(ret == -1){
1366
perror("seteuid");
1972
perror_plus("seteuid");
1367
1973
}
1368
1974
goto end;
1369
1975
}
1370
1976
}
1371
/* sleep checking until interface is running */
1977
/* Sleep checking until interface is running.
1978
Check every 0.25s, up to total time of delay */
1372
1979
for(int i=0; i < delay * 4; i++){
1373
1980
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1374
1981
if(ret == -1){
1375
perror("ioctl SIOCGIFFLAGS");
1982
perror_plus("ioctl SIOCGIFFLAGS");
1376
1983
} else if(network.ifr_flags & IFF_RUNNING){
1377
1984
break;
1378
1985
}
1379
1986
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
1987
ret = nanosleep(&sleeptime, NULL);
1381
1988
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
1989
perror_plus("nanosleep");
1383
1990
}
1384
1991
}
1385
1992
if(not take_down_interface){
1386
1993
/* We won't need the socket anymore */
1387
1994
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1388
1995
if(ret == -1){
1389
perror("close");
1996
perror_plus("close");
1390
1997
}
1391
1998
}
1392
1999
#ifdef __linux__
1394
2001
/* Restores kernel loglevel to default */
1395
2002
ret = klogctl(7, NULL, 0);
1396
2003
if(ret == -1){
1397
perror("klogctl");
2004
perror_plus("klogctl");
1398
2005
}
1399
2006
}
1400
2007
#endif /* __linux__ */
1404
2011
/* Lower privileges */
1405
2012
ret = seteuid(uid);
1406
2013
if(ret == -1){
1407
perror("seteuid");
2014
perror_plus("seteuid");
1408
2015
}
1409
2016
} else {
1410
2017
/* Lower privileges permanently */
1411
2018
ret = setuid(uid);
1412
2019
if(ret == -1){
1413
perror("setuid");
2020
perror_plus("setuid");
1414
2021
}
1415
2022
}
1416
2023
}
1421
2028
1422
2029
ret = init_gnutls_global(pubkey, seckey);
1423
2030
if(ret == -1){
1424
fprintf(stderr, "init_gnutls_global failed\n");
2031
fprintf(stderr, "Mandos plugin mandos-client: "
2032
"init_gnutls_global failed\n");
1425
2033
exitcode = EX_UNAVAILABLE;
1426
2034
goto end;
1427
2035
} else {
1432
2040
goto end;
1433
2041
}
1434
2042
2043
if(mkdtemp(tempdir) == NULL){
2044
perror_plus("mkdtemp");
2045
goto end;
2046
}
1435
2047
tempdir_created = true;
1436
if(mkdtemp(tempdir) == NULL){
1437
tempdir_created = false;
1438
perror("mkdtemp");
1439
goto end;
1440
}
1441
2048
1442
2049
if(quit_now){
1443
2050
goto end;
1444
2051
}
1445
2052
1446
2053
if(not init_gpgme(pubkey, seckey, tempdir)){
1447
fprintf(stderr, "init_gpgme failed\n");
2054
fprintf(stderr, "Mandos plugin mandos-client: "
2055
"init_gpgme failed\n");
1448
2056
exitcode = EX_UNAVAILABLE;
1449
2057
goto end;
1450
2058
} else {
1460
2068
/* (Mainly meant for debugging) */
1461
2069
char *address = strrchr(connect_to, ':');
1462
2070
if(address == NULL){
1463
fprintf(stderr, "No colon in address\n");
2071
fprintf(stderr, "Mandos plugin mandos-client: "
2072
"No colon in address\n");
1464
2073
exitcode = EX_USAGE;
1465
2074
goto end;
1466
2075
}
1474
2083
tmpmax = strtoimax(address+1, &tmp, 10);
1475
2084
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1476
2085
or tmpmax != (uint16_t)tmpmax){
1477
fprintf(stderr, "Bad port number\n");
2086
fprintf(stderr, "Mandos plugin mandos-client: "
2087
"Bad port number\n");
1478
2088
exitcode = EX_USAGE;
1479
2089
goto end;
1480
2090
}
1485
2095
1486
2096
port = (uint16_t)tmpmax;
1487
2097
*address = '\0';
1488
address = connect_to;
1489
2098
/* Colon in address indicates IPv6 */
1490
2099
int af;
1491
if(strchr(address, ':') != NULL){
2100
if(strchr(connect_to, ':') != NULL){
1492
2101
af = AF_INET6;
2102
/* Accept [] around IPv6 address - see RFC 5952 */
2103
if(connect_to[0] == '[' and address[-1] == ']')
2104
{
2105
connect_to++;
2106
address[-1] = '\0';
2107
}
1493
2108
} else {
1494
2109
af = AF_INET;
1495
2110
}
2111
address = connect_to;
1496
2112
1497
2113
if(quit_now){
1498
2114
goto end;
1499
2115
}
1500
2116
1501
ret = start_mandos_communication(address, port, if_index, af);
1502
if(ret < 0){
1503
switch(errno){
1504
case ENETUNREACH:
1505
case EHOSTDOWN:
1506
case EHOSTUNREACH:
1507
exitcode = EX_NOHOST;
1508
break;
1509
case EINVAL:
1510
exitcode = EX_USAGE;
1511
break;
1512
case EIO:
1513
exitcode = EX_IOERR;
1514
break;
1515
case EPROTO:
1516
exitcode = EX_PROTOCOL;
1517
break;
1518
default:
1519
exitcode = EX_OSERR;
1520
break;
1521
}
1522
} else {
2117
while(not quit_now){
2118
ret = start_mandos_communication(address, port, if_index, af);
2119
if(quit_now or ret == 0){
2120
break;
2121
}
2122
if(debug){
2123
fprintf(stderr, "Mandos plugin mandos-client: "
2124
"Retrying in %d seconds\n", (int)retry_interval);
2125
}
2126
sleep((int)retry_interval);
2127
}
2128
2129
if (not quit_now){
1523
2130
exitcode = EXIT_SUCCESS;
1524
2131
}
2132
1525
2133
goto end;
1526
2134
}
1527
2135
1549
2157
1550
2158
/* Check if creating the Avahi server object succeeded */
1551
2159
if(mc.server == NULL){
1552
fprintf(stderr, "Failed to create Avahi server: %s\n",
2160
fprintf(stderr, "Mandos plugin mandos-client: "
2161
"Failed to create Avahi server: %s\n",
1553
2162
avahi_strerror(error));
1554
2163
exitcode = EX_UNAVAILABLE;
1555
2164
goto end;
1564
2173
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1565
2174
NULL, 0, browse_callback, NULL);
1566
2175
if(sb == NULL){
1567
fprintf(stderr, "Failed to create service browser: %s\n",
2176
fprintf(stderr, "Mandos plugin mandos-client: "
2177
"Failed to create service browser: %s\n",
1568
2178
avahi_strerror(avahi_server_errno(mc.server)));
1569
2179
exitcode = EX_UNAVAILABLE;
1570
2180
goto end;
1577
2187
/* Run the main loop */
1578
2188
1579
2189
if(debug){
1580
fprintf(stderr, "Starting Avahi loop search\n");
1581
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
2190
fprintf(stderr, "Mandos plugin mandos-client: "
2191
"Starting Avahi loop search\n");
2192
}
2193
2194
ret = avahi_loop_with_timeout(mc.simple_poll,
2195
(int)(retry_interval * 1000));
2196
if(debug){
2197
fprintf(stderr, "Mandos plugin mandos-client: "
2198
"avahi_loop_with_timeout exited %s\n",
2199
(ret == 0) ? "successfully" : "with error");
2200
}
1584
2201
1585
2202
end:
1586
2203
1587
2204
if(debug){
1588
fprintf(stderr, "%s exiting\n", argv[0]);
2205
fprintf(stderr, "Mandos plugin mandos-client: "
2206
"%s exiting\n", argv[0]);
1589
2207
}
1590
2208
1591
2209
/* Cleanup things */
1607
2225
if(gpgme_initialized){
1608
2226
gpgme_release(mc.ctx);
1609
2227
}
2228
2229
/* Cleans up the circular linked list of Mandos servers the client
2230
has seen */
2231
if(mc.current_server != NULL){
2232
mc.current_server->prev->next = NULL;
2233
while(mc.current_server != NULL){
2234
server *next = mc.current_server->next;
2235
free(mc.current_server);
2236
mc.current_server = next;
2237
}
2238
}
2239
2240
/* XXX run network hooks "stop" here */
1610
2241
1611
2242
/* Take down the network interface */
1612
2243
if(take_down_interface){
1614
2245
errno = 0;
1615
2246
ret = seteuid(0);
1616
2247
if(ret == -1){
1617
perror("seteuid");
2248
perror_plus("seteuid");
1618
2249
}
1619
2250
if(geteuid() == 0){
1620
2251
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1621
2252
if(ret == -1){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
2253
perror_plus("ioctl SIOCGIFFLAGS");
2254
} else if(network.ifr_flags & IFF_UP){
1624
2255
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
2256
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
2257
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
2258
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1628
2259
}
1629
2260
}
1630
2261
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1631
2262
if(ret == -1){
1632
perror("close");
2263
perror_plus("close");
1633
2264
}
1634
2265
/* Lower privileges permanently */
1635
2266
errno = 0;
1636
2267
ret = setuid(uid);
1637
2268
if(ret == -1){
1638
perror("setuid");
2269
perror_plus("setuid");
1639
2270
}
1640
2271
}
1641
2272
}
1642
2273
1643
/* Removes the temp directory used by GPGME */
2274
/* Removes the GPGME temp directory and all files inside */
1644
2275
if(tempdir_created){
1645
DIR *d;
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1648
if(d == NULL){
1649
if(errno != ENOENT){
1650
perror("opendir");
1651
}
1652
} else {
1653
while(true){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1656
break;
1657
}
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
1663
continue;
1664
}
2276
struct dirent **direntries = NULL;
2277
struct dirent *direntry = NULL;
2278
int numentries = scandir(tempdir, &direntries, notdotentries,
2279
alphasort);
2280
if (numentries > 0){
2281
for(int i = 0; i < numentries; i++){
2282
direntry = direntries[i];
1665
2283
char *fullname = NULL;
1666
2284
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
2285
direntry->d_name);
1668
2286
if(ret < 0){
1669
perror("asprintf");
2287
perror_plus("asprintf");
1670
2288
continue;
1671
2289
}
1672
2290
ret = remove(fullname);
1673
2291
if(ret == -1){
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1675
strerror(errno));
2292
fprintf(stderr, "Mandos plugin mandos-client: "
2293
"remove(\"%s\"): %s\n", fullname, strerror(errno));
1676
2294
}
1677
2295
free(fullname);
1678
2296
}
1679
closedir(d);
2297
}
2298
2299
/* need to clean even if 0 because man page doesn't specify */
2300
free(direntries);
2301
if (numentries == -1){
2302
perror_plus("scandir");
1680
2303
}
1681
2304
ret = rmdir(tempdir);
1682
2305
if(ret == -1 and errno != ENOENT){
1683
perror("rmdir");
2306
perror_plus("rmdir");
1684
2307
}
1685
2308
}
1686
2309
1691
2314
&old_sigterm_action,
1692
2315
NULL));
1693
2316
if(ret == -1){
1694
perror("sigaction");
2317
perror_plus("sigaction");
1695
2318
}
1696
2319
do {
1697
2320
ret = raise(signal_received);
1698
2321
} while(ret != 0 and errno == EINTR);
1699
2322
if(ret != 0){
1700
perror("raise");
2323
perror_plus("raise");
1701
2324
abort();
1702
2325
}
1703
2326
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0