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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
- files removed:
- debian/source
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
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
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
85
84
raise() */
86
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
87
91
88
#ifdef __linux__
92
89
#include <sys/klog.h> /* klogctl() */
110
107
init_gnutls_session(),
111
108
GNUTLS_* */
112
109
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
115
112
116
113
/* GPGME */
117
114
#include <gpgme.h> /* All GPGME types, constants and
125
122
#define PATHDIR "/conf/conf.d/mandos"
126
123
#define SECKEY "seckey.txt"
127
124
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
125
130
126
bool debug = false;
131
127
static const char mandos_protocol_version[] = "1";
132
128
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
130
static const char sys_class_net[] = "/sys/class/net";
135
131
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;
148
132
149
133
/* Used for passing in values through the Avahi callback functions */
150
134
typedef struct {
155
139
gnutls_dh_params_t dh_params;
156
140
const char *priority;
157
141
gpgme_ctx_t ctx;
158
server *current_server;
159
142
} mandos_context;
160
143
161
144
/* global context so signal handler can reach it*/
162
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
146
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
166
148
167
149
sig_atomic_t quit_now = 0;
168
150
int signal_received = 0;
169
151
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
177
int fprintf_plus(FILE *stream, const char *format, ...){
178
va_list ap;
179
va_start (ap, format);
180
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
184
}
185
186
152
/*
187
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
188
154
* bytes. "buffer_capacity" is how much is currently allocated,
189
155
* "buffer_length" is how much is already used.
190
156
*/
191
157
size_t incbuffer(char **buffer, size_t buffer_length,
192
size_t buffer_capacity){
158
size_t buffer_capacity){
193
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
194
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
195
161
if(buffer == NULL){
200
166
return buffer_capacity;
201
167
}
202
168
203
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
206
int ret;
207
server *new_server = malloc(sizeof(server));
208
if(new_server == NULL){
209
perror_plus("malloc");
210
return -1;
211
}
212
*new_server = (server){ .ip = strdup(ip),
213
.port = port,
214
.if_index = if_index,
215
.af = af };
216
if(new_server->ip == NULL){
217
perror_plus("strdup");
218
return -1;
219
}
220
/* Special case of first server */
221
if (mc.current_server == NULL){
222
new_server->next = new_server;
223
new_server->prev = new_server;
224
mc.current_server = new_server;
225
/* Place the new server last in the list */
226
} else {
227
new_server->next = mc.current_server;
228
new_server->prev = mc.current_server->prev;
229
new_server->prev->next = new_server;
230
mc.current_server->prev = new_server;
231
}
232
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
233
if(ret == -1){
234
perror_plus("clock_gettime");
235
return -1;
236
}
237
return 0;
238
}
239
240
169
/*
241
170
* Initialize GPGME.
242
171
*/
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
245
174
gpgme_error_t rc;
246
175
gpgme_engine_info_t engine_info;
247
176
256
185
257
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
258
187
if(fd == -1){
259
perror_plus("open");
188
perror("open");
260
189
return false;
261
190
}
262
191
263
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
264
193
if(rc != GPG_ERR_NO_ERROR){
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
267
196
return false;
268
197
}
269
198
270
199
rc = gpgme_op_import(mc.ctx, pgp_data);
271
200
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
274
203
return false;
275
204
}
276
205
277
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
278
207
if(ret == -1){
279
perror_plus("close");
208
perror("close");
280
209
}
281
210
gpgme_data_release(pgp_data);
282
211
return true;
283
212
}
284
213
285
214
if(debug){
286
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
287
216
}
288
217
289
218
/* Init GPGME */
290
219
gpgme_check_version(NULL);
291
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
292
221
if(rc != GPG_ERR_NO_ERROR){
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
295
224
return false;
296
225
}
297
226
298
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
299
228
rc = gpgme_get_engine_info(&engine_info);
300
229
if(rc != GPG_ERR_NO_ERROR){
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
303
232
return false;
304
233
}
305
234
while(engine_info != NULL){
311
240
engine_info = engine_info->next;
312
241
}
313
242
if(engine_info == NULL){
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
244
return false;
317
245
}
318
246
319
247
/* Create new GPGME "context" */
320
248
rc = gpgme_new(&(mc.ctx));
321
249
if(rc != GPG_ERR_NO_ERROR){
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
325
252
return false;
326
253
}
327
254
346
273
ssize_t plaintext_length = 0;
347
274
348
275
if(debug){
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
277
}
351
278
352
279
/* Create new GPGME data buffer from memory cryptotext */
353
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
354
281
0);
355
282
if(rc != GPG_ERR_NO_ERROR){
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
358
285
return -1;
359
286
}
360
287
361
288
/* Create new empty GPGME data buffer for the plaintext */
362
289
rc = gpgme_data_new(&dh_plain);
363
290
if(rc != GPG_ERR_NO_ERROR){
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
367
293
gpgme_data_release(dh_crypto);
368
294
return -1;
369
295
}
372
298
data buffer */
373
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
374
300
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
377
303
plaintext_length = -1;
378
304
if(debug){
379
305
gpgme_decrypt_result_t result;
380
306
result = gpgme_op_decrypt_result(mc.ctx);
381
307
if(result == NULL){
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
309
} else {
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
388
314
if(result->file_name != NULL){
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
390
316
}
391
317
gpgme_recipient_t recipient;
392
318
recipient = result->recipients;
393
319
while(recipient != NULL){
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
400
? "No" : "Yes");
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
325
? "No" : "Yes");
401
326
recipient = recipient->next;
402
327
}
403
328
}
406
331
}
407
332
408
333
if(debug){
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
335
}
411
336
412
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
413
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
414
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
415
340
plaintext_length = -1;
416
341
goto decrypt_end;
417
342
}
419
344
*plaintext = NULL;
420
345
while(true){
421
346
plaintext_capacity = incbuffer(plaintext,
422
(size_t)plaintext_length,
423
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
424
349
if(plaintext_capacity == 0){
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
428
353
}
429
354
430
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
435
360
break;
436
361
}
437
362
if(ret < 0){
438
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
439
364
plaintext_length = -1;
440
365
goto decrypt_end;
441
366
}
443
368
}
444
369
445
370
if(debug){
446
fprintf_plus(stderr, "Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
447
372
for(ssize_t i = 0; i < plaintext_length; i++){
448
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
449
374
}
471
396
/* GnuTLS log function callback */
472
397
static void debuggnutls(__attribute__((unused)) int level,
473
398
const char* string){
474
fprintf_plus(stderr, "GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
475
400
}
476
401
477
402
static int init_gnutls_global(const char *pubkeyfilename,
479
404
int ret;
480
405
481
406
if(debug){
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
483
408
}
484
409
485
410
ret = gnutls_global_init();
486
411
if(ret != GNUTLS_E_SUCCESS){
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
489
414
return -1;
490
415
}
491
416
498
423
}
499
424
500
425
/* OpenPGP credentials */
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
502
427
if(ret != GNUTLS_E_SUCCESS){
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
432
safer_gnutls_strerror(ret));
505
433
gnutls_global_deinit();
506
434
return -1;
507
435
}
508
436
509
437
if(debug){
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
514
441
}
515
442
516
443
ret = gnutls_certificate_set_openpgp_key_file
517
444
(mc.cred, pubkeyfilename, seckeyfilename,
518
445
GNUTLS_OPENPGP_FMT_BASE64);
519
446
if(ret != GNUTLS_E_SUCCESS){
520
fprintf_plus(stderr,
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
447
fprintf(stderr,
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
525
452
goto globalfail;
526
453
}
527
454
528
455
/* GnuTLS server initialization */
529
456
ret = gnutls_dh_params_init(&mc.dh_params);
530
457
if(ret != GNUTLS_E_SUCCESS){
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
534
460
goto globalfail;
535
461
}
536
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
537
463
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
540
466
goto globalfail;
541
467
}
542
468
562
488
}
563
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
564
490
if(ret != GNUTLS_E_SUCCESS){
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
568
493
}
569
494
570
495
{
577
502
}
578
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
579
504
if(ret != GNUTLS_E_SUCCESS){
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
505
fprintf(stderr, "Syntax error at: %s\n", err);
506
fprintf(stderr, "GnuTLS error: %s\n",
507
safer_gnutls_strerror(ret));
583
508
gnutls_deinit(*session);
584
509
return -1;
585
510
}
594
519
}
595
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
596
521
if(ret != GNUTLS_E_SUCCESS){
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
599
524
gnutls_deinit(*session);
600
525
return -1;
601
526
}
646
571
pf = PF_INET;
647
572
break;
648
573
default:
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
650
575
errno = EINVAL;
651
576
return -1;
652
577
}
657
582
}
658
583
659
584
if(debug){
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
662
587
}
663
588
664
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
665
590
if(tcp_sd < 0){
666
591
int e = errno;
667
perror_plus("socket");
592
perror("socket");
668
593
errno = e;
669
594
goto mandos_end;
670
595
}
684
609
}
685
610
if(ret < 0 ){
686
611
int e = errno;
687
perror_plus("inet_pton");
612
perror("inet_pton");
688
613
errno = e;
689
614
goto mandos_end;
690
615
}
691
616
if(ret == 0){
692
617
int e = errno;
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
694
619
errno = e;
695
620
goto mandos_end;
696
621
}
701
626
702
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
703
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
704
-Wunreachable-code*/
629
-Wunreachable-code*/
705
630
if(if_index == AVAHI_IF_UNSPEC){
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
708
633
errno = EINVAL;
709
634
goto mandos_end;
710
635
}
726
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
727
652
char interface[IF_NAMESIZE];
728
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
perror_plus("if_indextoname");
654
perror("if_indextoname");
730
655
} else {
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
733
658
}
734
659
} else {
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
737
662
}
738
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
746
671
sizeof(addrstr));
747
672
}
748
673
if(pcret == NULL){
749
perror_plus("inet_ntop");
674
perror("inet_ntop");
750
675
} else {
751
676
if(strcmp(addrstr, ip) != 0){
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
678
}
754
679
}
755
680
}
765
690
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
766
691
}
767
692
if(ret < 0){
768
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
769
int e = errno;
770
perror_plus("connect");
771
errno = e;
772
}
693
int e = errno;
694
perror("connect");
695
errno = e;
773
696
goto mandos_end;
774
697
}
775
698
783
706
while(true){
784
707
size_t out_size = strlen(out);
785
708
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
786
out_size - written));
709
out_size - written));
787
710
if(ret == -1){
788
711
int e = errno;
789
perror_plus("write");
712
perror("write");
790
713
errno = e;
791
714
goto mandos_end;
792
715
}
809
732
}
810
733
811
734
if(debug){
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
735
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
736
}
814
737
815
738
if(quit_now){
817
740
goto mandos_end;
818
741
}
819
742
820
/* Spurious warning from -Wint-to-pointer-cast */
821
743
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
822
744
823
745
if(quit_now){
835
757
836
758
if(ret != GNUTLS_E_SUCCESS){
837
759
if(debug){
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
760
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
761
gnutls_perror(ret);
840
762
}
841
763
errno = EPROTO;
845
767
/* Read OpenPGP packet that contains the wanted password */
846
768
847
769
if(debug){
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
770
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
771
ip);
850
772
}
851
773
852
774
while(true){
857
779
}
858
780
859
781
buffer_capacity = incbuffer(&buffer, buffer_length,
860
buffer_capacity);
782
buffer_capacity);
861
783
if(buffer_capacity == 0){
862
784
int e = errno;
863
perror_plus("incbuffer");
785
perror("incbuffer");
864
786
errno = e;
865
787
goto mandos_end;
866
788
}
890
812
}
891
813
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
892
814
if(ret < 0){
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
815
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
816
gnutls_perror(ret);
896
817
errno = EPROTO;
897
818
goto mandos_end;
898
819
}
899
820
break;
900
821
default:
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
822
fprintf(stderr, "Unknown error while reading data from"
823
" encrypted session with Mandos server\n");
903
824
gnutls_bye(session, GNUTLS_SHUT_RDWR);
904
825
errno = EIO;
905
826
goto mandos_end;
910
831
}
911
832
912
833
if(debug){
913
fprintf_plus(stderr, "Closing TLS session\n");
834
fprintf(stderr, "Closing TLS session\n");
914
835
}
915
836
916
837
if(quit_now){
928
849
929
850
if(buffer_length > 0){
930
851
ssize_t decrypted_buffer_size;
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
decrypted_buffer_size = pgp_packet_decrypt(buffer,
853
buffer_length,
932
854
&decrypted_buffer);
933
855
if(decrypted_buffer_size >= 0){
934
856
945
867
if(ret == 0 and ferror(stdout)){
946
868
int e = errno;
947
869
if(debug){
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
870
fprintf(stderr, "Error writing encrypted data: %s\n",
871
strerror(errno));
950
872
}
951
873
errno = e;
952
874
goto mandos_end;
971
893
if(e == 0){
972
894
e = errno;
973
895
}
974
perror_plus("close");
896
perror("close");
975
897
}
976
898
gnutls_deinit(session);
977
errno = e;
978
899
if(quit_now){
979
errno = EINTR;
900
e = EINTR;
980
901
retval = -1;
981
902
}
903
errno = e;
982
904
}
983
905
return retval;
984
906
}
1009
931
switch(event){
1010
932
default:
1011
933
case AVAHI_RESOLVER_FAILURE:
1012
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1013
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1014
domain,
1015
avahi_strerror(avahi_server_errno(mc.server)));
934
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
935
" of type '%s' in domain '%s': %s\n", name, type, domain,
936
avahi_strerror(avahi_server_errno(mc.server)));
1016
937
break;
1017
938
1018
939
case AVAHI_RESOLVER_FOUND:
1020
941
char ip[AVAHI_ADDRESS_STR_MAX];
1021
942
avahi_address_snprint(ip, sizeof(ip), address);
1022
943
if(debug){
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
944
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
945
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
946
ip, (intmax_t)interface, port);
1026
947
}
1027
948
int ret = start_mandos_communication(ip, port, interface,
1028
949
avahi_proto_to_af(proto));
1029
950
if(ret == 0){
1030
951
avahi_simple_poll_quit(mc.simple_poll);
1031
} else {
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
1034
952
}
1035
953
}
1036
954
}
1060
978
default:
1061
979
case AVAHI_BROWSER_FAILURE:
1062
980
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
981
fprintf(stderr, "(Avahi browser) %s\n",
982
avahi_strerror(avahi_server_errno(mc.server)));
1065
983
avahi_simple_poll_quit(mc.simple_poll);
1066
984
return;
1067
985
1074
992
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1075
993
name, type, domain, protocol, 0,
1076
994
resolve_callback, NULL) == NULL)
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
995
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
996
name, avahi_strerror(avahi_server_errno(mc.server)));
1080
997
break;
1081
998
1082
999
case AVAHI_BROWSER_REMOVE:
1085
1002
case AVAHI_BROWSER_ALL_FOR_NOW:
1086
1003
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1087
1004
if(debug){
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1005
fprintf(stderr, "No Mandos server found, still searching...\n");
1090
1006
}
1091
1007
break;
1092
1008
}
1093
1009
}
1094
1010
1095
/* Signal handler that stops main loop after SIGTERM */
1011
/* stop main loop after sigterm has been called */
1096
1012
static void handle_sigterm(int sig){
1097
1013
if(quit_now){
1098
1014
return;
1100
1016
quit_now = 1;
1101
1017
signal_received = sig;
1102
1018
int old_errno = errno;
1103
/* set main loop to exit */
1104
1019
if(mc.simple_poll != NULL){
1105
1020
avahi_simple_poll_quit(mc.simple_poll);
1106
1021
}
1107
1022
errno = old_errno;
1108
1023
}
1109
1024
1110
bool get_flags(const char *ifname, struct ifreq *ifr){
1111
int ret;
1112
1113
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1114
if(s < 0){
1115
perror_plus("socket");
1116
return false;
1117
}
1118
strcpy(ifr->ifr_name, ifname);
1119
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1120
if(ret == -1){
1025
/*
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1029
*/
1030
int good_interface(const struct dirent *if_entry){
1031
ssize_t ssret;
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1034
if_entry->d_name);
1035
if(ret < 0){
1036
perror("asprintf");
1037
return 0;
1038
}
1039
if(if_entry->d_name[0] == '.'){
1040
return 0;
1041
}
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1043
if(flags_fd == -1){
1044
perror("open");
1045
return 0;
1046
}
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1053
perror("malloc");
1054
close(flags_fd);
1055
return 0;
1056
}
1057
while(to_read > 0){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1059
(size_t)to_read));
1060
if(ssret == -1){
1061
perror("read");
1062
free(flagstring);
1063
close(flags_fd);
1064
return 0;
1065
}
1066
to_read -= ssret;
1067
if(ssret == 0){
1068
break;
1069
}
1070
}
1071
close(flags_fd);
1072
intmax_t tmpmax;
1073
char *tmp;
1074
errno = 0;
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1121
1079
if(debug){
1122
perror_plus("ioctl SIOCGIFFLAGS");
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1123
1082
}
1124
return false;
1083
free(flagstring);
1084
return 0;
1125
1085
}
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1086
free(flagstring);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1131
1088
/* Reject the loopback device */
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1089
if(flags & IFF_LOOPBACK){
1133
1090
if(debug){
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1092
if_entry->d_name);
1136
1093
}
1137
return false;
1094
return 0;
1138
1095
}
1139
1096
/* Accept point-to-point devices only if connect_to is specified */
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1141
1098
if(debug){
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1100
if_entry->d_name);
1144
1101
}
1145
return true;
1102
return 1;
1146
1103
}
1147
1104
/* Otherwise, reject non-broadcast-capable devices */
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1149
if(debug){
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1152
}
1153
return false;
1154
}
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1156
if(ifr->ifr_flags & IFF_NOARP){
1157
if(debug){
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1160
}
1161
return false;
1162
}
1163
1105
if(not (flags & IFF_BROADCAST)){
1106
if(debug){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1108
if_entry->d_name);
1109
}
1110
return 0;
1111
}
1164
1112
/* Accept this device */
1165
1113
if(debug){
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1167
}
1168
return true;
1169
}
1170
1171
/*
1172
* This function determines if a directory entry in /sys/class/net
1173
* corresponds to an acceptable network device.
1174
* (This function is passed to scandir(3) as a filter function.)
1175
*/
1176
int good_interface(const struct dirent *if_entry){
1177
if(if_entry->d_name[0] == '.'){
1178
return 0;
1179
}
1180
1181
struct ifreq ifr;
1182
if(not get_flags(if_entry->d_name, &ifr)){
1183
if(debug){
1184
fprintf_plus(stderr, "Failed to get flags for interface "
1185
"\"%s\"\n", if_entry->d_name);
1186
}
1187
return 0;
1188
}
1189
1190
if(not good_flags(if_entry->d_name, &ifr)){
1191
return 0;
1192
}
1193
return 1;
1194
}
1195
1196
/*
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1200
*/
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1203
return 0;
1204
}
1205
1206
struct ifreq ifr;
1207
if(not get_flags(if_entry->d_name, &ifr)){
1208
if(debug){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1211
}
1212
return 0;
1213
}
1214
1215
/* Reject down interfaces */
1216
if(not (ifr.ifr_flags & IFF_UP)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1219
if_entry->d_name);
1220
}
1221
return 0;
1222
}
1223
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1226
if(debug){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1228
if_entry->d_name);
1229
}
1230
return 0;
1231
}
1232
1233
if(not good_flags(if_entry->d_name, &ifr)){
1234
return 0;
1235
}
1236
return 1;
1237
}
1238
1239
int notdotentries(const struct dirent *direntry){
1240
/* Skip "." and ".." */
1241
if(direntry->d_name[0] == '.'
1242
and (direntry->d_name[1] == '\0'
1243
or (direntry->d_name[1] == '.'
1244
and direntry->d_name[2] == '\0'))){
1245
return 0;
1246
}
1247
return 1;
1248
}
1249
1250
/* Is this directory entry a runnable program? */
1251
int runnable_hook(const struct dirent *direntry){
1252
int ret;
1253
size_t sret;
1254
struct stat st;
1255
1256
if((direntry->d_name)[0] == '\0'){
1257
/* Empty name? */
1258
return 0;
1259
}
1260
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1263
"0123456789"
1264
"_-");
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1267
if(debug){
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1269
direntry->d_name);
1270
}
1271
return 0;
1272
}
1273
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1276
if(ret < 0){
1277
perror_plus("asprintf");
1278
return 0;
1279
}
1280
1281
ret = stat(fullname, &st);
1282
if(ret == -1){
1283
if(debug){
1284
perror_plus("Could not stat hook");
1285
}
1286
return 0;
1287
}
1288
if(not (S_ISREG(st.st_mode))){
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1294
return 0;
1295
}
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
if(debug){
1305
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1306
direntry->d_name);
1307
}
1308
return 1;
1309
}
1310
1311
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1312
int ret;
1313
struct timespec now;
1314
struct timespec waited_time;
1315
intmax_t block_time;
1316
1317
while(true){
1318
if(mc.current_server == NULL){
1319
if (debug){
1320
fprintf_plus(stderr, "Wait until first server is found."
1321
" No timeout!\n");
1322
}
1323
ret = avahi_simple_poll_iterate(s, -1);
1324
} else {
1325
if (debug){
1326
fprintf_plus(stderr, "Check current_server if we should run"
1327
" it, or wait\n");
1328
}
1329
/* the current time */
1330
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1331
if(ret == -1){
1332
perror_plus("clock_gettime");
1333
return -1;
1334
}
1335
/* Calculating in ms how long time between now and server
1336
who we visted longest time ago. Now - last seen. */
1337
waited_time.tv_sec = (now.tv_sec
1338
- mc.current_server->last_seen.tv_sec);
1339
waited_time.tv_nsec = (now.tv_nsec
1340
- mc.current_server->last_seen.tv_nsec);
1341
/* total time is 10s/10,000ms.
1342
Converting to s from ms by dividing by 1,000,
1343
and ns to ms by dividing by 1,000,000. */
1344
block_time = ((retry_interval
1345
- ((intmax_t)waited_time.tv_sec * 1000))
1346
- ((intmax_t)waited_time.tv_nsec / 1000000));
1347
1348
if (debug){
1349
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1350
block_time);
1351
}
1352
1353
if(block_time <= 0){
1354
ret = start_mandos_communication(mc.current_server->ip,
1355
mc.current_server->port,
1356
mc.current_server->if_index,
1357
mc.current_server->af);
1358
if(ret == 0){
1359
avahi_simple_poll_quit(mc.simple_poll);
1360
return 0;
1361
}
1362
ret = clock_gettime(CLOCK_MONOTONIC,
1363
&mc.current_server->last_seen);
1364
if(ret == -1){
1365
perror_plus("clock_gettime");
1366
return -1;
1367
}
1368
mc.current_server = mc.current_server->next;
1369
block_time = 0; /* Call avahi to find new Mandos
1370
servers, but don't block */
1371
}
1372
1373
ret = avahi_simple_poll_iterate(s, (int)block_time);
1374
}
1375
if(ret != 0){
1376
if (ret > 0 or errno != EINTR){
1377
return (ret != 1) ? ret : 0;
1378
}
1379
}
1380
}
1381
}
1382
1383
bool run_network_hooks(const char *mode, const char *interface,
1384
const float delay){
1385
struct dirent **direntries;
1386
struct dirent *direntry;
1387
int ret;
1388
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1389
alphasort);
1390
if(numhooks == -1){
1391
perror_plus("scandir");
1392
} else {
1393
int devnull = open("/dev/null", O_RDONLY);
1394
for(int i = 0; i < numhooks; i++){
1395
direntry = direntries[i];
1396
char *fullname = NULL;
1397
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1398
if(ret < 0){
1399
perror_plus("asprintf");
1400
continue;
1401
}
1402
if(debug){
1403
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1404
direntry->d_name);
1405
}
1406
pid_t hook_pid = fork();
1407
if(hook_pid == 0){
1408
/* Child */
1409
dup2(devnull, STDIN_FILENO);
1410
close(devnull);
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1412
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1413
if(ret == -1){
1414
perror_plus("setenv");
1415
_exit(EX_OSERR);
1416
}
1417
ret = setenv("DEVICE", interface, 1);
1418
if(ret == -1){
1419
perror_plus("setenv");
1420
_exit(EX_OSERR);
1421
}
1422
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1423
if(ret == -1){
1424
perror_plus("setenv");
1425
_exit(EX_OSERR);
1426
}
1427
ret = setenv("MODE", mode, 1);
1428
if(ret == -1){
1429
perror_plus("setenv");
1430
_exit(EX_OSERR);
1431
}
1432
char *delaystring;
1433
ret = asprintf(&delaystring, "%f", delay);
1434
if(ret == -1){
1435
perror_plus("asprintf");
1436
_exit(EX_OSERR);
1437
}
1438
ret = setenv("DELAY", delaystring, 1);
1439
if(ret == -1){
1440
free(delaystring);
1441
perror_plus("setenv");
1442
_exit(EX_OSERR);
1443
}
1444
free(delaystring);
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1447
} else {
1448
int status;
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1450
perror_plus("waitpid");
1451
free(fullname);
1452
continue;
1453
}
1454
if(WIFEXITED(status)){
1455
if(WEXITSTATUS(status) != 0){
1456
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1457
" with status %d\n", direntry->d_name,
1458
WEXITSTATUS(status));
1459
free(fullname);
1460
continue;
1461
}
1462
} else if(WIFSIGNALED(status)){
1463
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1464
" signal %d\n", direntry->d_name,
1465
WTERMSIG(status));
1466
free(fullname);
1467
continue;
1468
} else {
1469
fprintf_plus(stderr, "Warning: network hook \"%s\""
1470
" crashed\n", direntry->d_name);
1471
free(fullname);
1472
continue;
1473
}
1474
}
1475
free(fullname);
1476
if(debug){
1477
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1478
direntry->d_name);
1479
}
1480
}
1481
close(devnull);
1482
}
1483
return true;
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1115
if_entry->d_name);
1116
}
1117
return 1;
1484
1118
}
1485
1119
1486
1120
int main(int argc, char *argv[]){
1505
1139
bool gnutls_initialized = false;
1506
1140
bool gpgme_initialized = false;
1507
1141
float delay = 2.5f;
1508
double retry_interval = 10; /* 10s between trying a server and
1509
retrying the same server again */
1510
1142
1511
1143
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1512
1144
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1518
1150
errno = 0;
1519
1151
ret = setgid(gid);
1520
1152
if(ret == -1){
1521
perror_plus("setgid");
1153
perror("setgid");
1522
1154
}
1523
1155
1524
1156
/* Lower user privileges (temporarily) */
1525
1157
errno = 0;
1526
1158
ret = seteuid(uid);
1527
1159
if(ret == -1){
1528
perror_plus("seteuid");
1160
perror("seteuid");
1529
1161
}
1530
1162
1531
1163
if(quit_now){
1566
1198
.arg = "SECONDS",
1567
1199
.doc = "Maximum delay to wait for interface startup",
1568
1200
.group = 2 },
1569
{ .name = "retry", .key = 132,
1570
.arg = "SECONDS",
1571
.doc = "Retry interval used when denied by the mandos server",
1572
.group = 2 },
1573
{ .name = "network-hook-dir", .key = 133,
1574
.arg = "DIR",
1575
.doc = "Directory where network hooks are located",
1576
.group = 2 },
1577
1201
/*
1578
1202
* These reproduce what we would get without ARGP_NO_HELP
1579
1203
*/
1623
1247
if(errno != 0 or tmp == arg or *tmp != '\0'){
1624
1248
argp_error(state, "Bad delay");
1625
1249
}
1626
case 132: /* --retry */
1627
errno = 0;
1628
retry_interval = strtod(arg, &tmp);
1629
if(errno != 0 or tmp == arg or *tmp != '\0'
1630
or (retry_interval * 1000) > INT_MAX
1631
or retry_interval < 0){
1632
argp_error(state, "Bad retry interval");
1633
}
1634
break;
1635
case 133: /* --network-hook-dir */
1636
hookdir = arg;
1637
1250
break;
1638
1251
/*
1639
1252
* These reproduce what we would get without ARGP_NO_HELP
1646
1259
argp_state_help(state, state->out_stream,
1647
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1648
1261
case 'V': /* --version */
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1651
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1652
1263
exit(argp_err_exit_status);
1653
1264
break;
1654
1265
default:
1669
1280
case ENOMEM:
1670
1281
default:
1671
1282
errno = ret;
1672
perror_plus("argp_parse");
1283
perror("argp_parse");
1673
1284
exitcode = EX_OSERR;
1674
1285
goto end;
1675
1286
case EINVAL:
1677
1288
goto end;
1678
1289
}
1679
1290
}
1680
1681
if(getuid() == 0){
1682
/* Work around Debian bug #633582:
1683
<http://bugs.debian.org/633582> */
1684
struct stat st;
1685
1686
/* Re-raise priviliges */
1687
errno = 0;
1688
ret = seteuid(0);
1689
if(ret == -1){
1690
perror_plus("seteuid");
1691
}
1692
1693
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1694
int seckey_fd = open(seckey, O_RDONLY);
1695
if(seckey_fd == -1){
1696
perror_plus("open");
1697
} else {
1698
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1699
if(ret == -1){
1700
perror_plus("fstat");
1701
} else {
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1704
ret = fchown(seckey_fd, uid, gid);
1705
if(ret == -1){
1706
perror_plus("fchown");
1707
}
1708
}
1709
}
1710
TEMP_FAILURE_RETRY(close(seckey_fd));
1711
}
1712
}
1713
1714
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1715
int pubkey_fd = open(pubkey, O_RDONLY);
1716
if(pubkey_fd == -1){
1717
perror_plus("open");
1718
} else {
1719
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1720
if(ret == -1){
1721
perror_plus("fstat");
1722
} else {
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1725
ret = fchown(pubkey_fd, uid, gid);
1726
if(ret == -1){
1727
perror_plus("fchown");
1728
}
1729
}
1730
}
1731
TEMP_FAILURE_RETRY(close(pubkey_fd));
1732
}
1733
}
1734
1735
/* Lower privileges */
1736
errno = 0;
1737
ret = seteuid(uid);
1738
if(ret == -1){
1739
perror_plus("seteuid");
1740
}
1741
}
1742
1743
/* Run network hooks */
1744
{
1745
if(getuid() == 0){
1746
/* Re-raise priviliges */
1747
errno = 0;
1748
ret = seteuid(0);
1749
if(ret == -1){
1750
perror_plus("seteuid");
1751
}
1752
}
1753
if(not run_network_hooks("start", interface, delay)){
1754
goto end;
1755
}
1756
if(getuid() == 0){
1757
/* Lower privileges */
1758
errno = 0;
1759
ret = seteuid(uid);
1760
if(ret == -1){
1761
perror_plus("seteuid");
1762
}
1763
}
1764
}
1765
1291
1766
1292
if(not debug){
1767
1293
avahi_set_log_function(empty_log);
1768
1294
}
1769
1295
1770
1296
if(interface[0] == '\0'){
1771
1297
struct dirent **direntries;
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1774
1299
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
1300
if(ret >= 1){
1782
/* Pick the first interface returned */
1301
/* Pick the first good interface */
1783
1302
interface = strdup(direntries[0]->d_name);
1784
1303
if(debug){
1785
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1786
1305
}
1787
1306
if(interface == NULL){
1788
perror_plus("malloc");
1307
perror("malloc");
1789
1308
free(direntries);
1790
1309
exitcode = EXIT_FAILURE;
1791
1310
goto end;
1793
1312
free(direntries);
1794
1313
} else {
1795
1314
free(direntries);
1796
fprintf_plus(stderr, "Could not find a network interface\n");
1315
fprintf(stderr, "Could not find a network interface\n");
1797
1316
exitcode = EXIT_FAILURE;
1798
1317
goto end;
1799
1318
}
1805
1324
srand((unsigned int) time(NULL));
1806
1325
mc.simple_poll = avahi_simple_poll_new();
1807
1326
if(mc.simple_poll == NULL){
1808
fprintf_plus(stderr,
1809
"Avahi: Failed to create simple poll object.\n");
1327
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1810
1328
exitcode = EX_UNAVAILABLE;
1811
1329
goto end;
1812
1330
}
1814
1332
sigemptyset(&sigterm_action.sa_mask);
1815
1333
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1816
1334
if(ret == -1){
1817
perror_plus("sigaddset");
1335
perror("sigaddset");
1818
1336
exitcode = EX_OSERR;
1819
1337
goto end;
1820
1338
}
1821
1339
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1822
1340
if(ret == -1){
1823
perror_plus("sigaddset");
1341
perror("sigaddset");
1824
1342
exitcode = EX_OSERR;
1825
1343
goto end;
1826
1344
}
1827
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1828
1346
if(ret == -1){
1829
perror_plus("sigaddset");
1347
perror("sigaddset");
1830
1348
exitcode = EX_OSERR;
1831
1349
goto end;
1832
1350
}
1836
1354
*/
1837
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1838
1356
if(ret == -1){
1839
perror_plus("sigaction");
1357
perror("sigaction");
1840
1358
return EX_OSERR;
1841
1359
}
1842
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1843
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1844
1362
if(ret == -1){
1845
perror_plus("sigaction");
1363
perror("sigaction");
1846
1364
exitcode = EX_OSERR;
1847
1365
goto end;
1848
1366
}
1849
1367
}
1850
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1851
1369
if(ret == -1){
1852
perror_plus("sigaction");
1370
perror("sigaction");
1853
1371
return EX_OSERR;
1854
1372
}
1855
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1856
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1857
1375
if(ret == -1){
1858
perror_plus("sigaction");
1376
perror("sigaction");
1859
1377
exitcode = EX_OSERR;
1860
1378
goto end;
1861
1379
}
1862
1380
}
1863
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1864
1382
if(ret == -1){
1865
perror_plus("sigaction");
1383
perror("sigaction");
1866
1384
return EX_OSERR;
1867
1385
}
1868
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1869
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1870
1388
if(ret == -1){
1871
perror_plus("sigaction");
1389
perror("sigaction");
1872
1390
exitcode = EX_OSERR;
1873
1391
goto end;
1874
1392
}
1878
1396
if(strcmp(interface, "none") != 0){
1879
1397
if_index = (AvahiIfIndex) if_nametoindex(interface);
1880
1398
if(if_index == 0){
1881
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1399
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1882
1400
exitcode = EX_UNAVAILABLE;
1883
1401
goto end;
1884
1402
}
1891
1409
errno = 0;
1892
1410
ret = seteuid(0);
1893
1411
if(ret == -1){
1894
perror_plus("seteuid");
1412
perror("seteuid");
1895
1413
}
1896
1414
1897
1415
#ifdef __linux__
1901
1419
bool restore_loglevel = true;
1902
1420
if(ret == -1){
1903
1421
restore_loglevel = false;
1904
perror_plus("klogctl");
1422
perror("klogctl");
1905
1423
}
1906
1424
#endif /* __linux__ */
1907
1425
1908
1426
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1909
1427
if(sd < 0){
1910
perror_plus("socket");
1428
perror("socket");
1911
1429
exitcode = EX_OSERR;
1912
1430
#ifdef __linux__
1913
1431
if(restore_loglevel){
1914
1432
ret = klogctl(7, NULL, 0);
1915
1433
if(ret == -1){
1916
perror_plus("klogctl");
1434
perror("klogctl");
1917
1435
}
1918
1436
}
1919
1437
#endif /* __linux__ */
1921
1439
errno = 0;
1922
1440
ret = seteuid(uid);
1923
1441
if(ret == -1){
1924
perror_plus("seteuid");
1442
perror("seteuid");
1925
1443
}
1926
1444
goto end;
1927
1445
}
1928
1446
strcpy(network.ifr_name, interface);
1929
1447
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1930
1448
if(ret == -1){
1931
perror_plus("ioctl SIOCGIFFLAGS");
1449
perror("ioctl SIOCGIFFLAGS");
1932
1450
#ifdef __linux__
1933
1451
if(restore_loglevel){
1934
1452
ret = klogctl(7, NULL, 0);
1935
1453
if(ret == -1){
1936
perror_plus("klogctl");
1454
perror("klogctl");
1937
1455
}
1938
1456
}
1939
1457
#endif /* __linux__ */
1942
1460
errno = 0;
1943
1461
ret = seteuid(uid);
1944
1462
if(ret == -1){
1945
perror_plus("seteuid");
1463
perror("seteuid");
1946
1464
}
1947
1465
goto end;
1948
1466
}
1952
1470
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1953
1471
if(ret == -1){
1954
1472
take_down_interface = false;
1955
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1956
1474
exitcode = EX_OSERR;
1957
1475
#ifdef __linux__
1958
1476
if(restore_loglevel){
1959
1477
ret = klogctl(7, NULL, 0);
1960
1478
if(ret == -1){
1961
perror_plus("klogctl");
1479
perror("klogctl");
1962
1480
}
1963
1481
}
1964
1482
#endif /* __linux__ */
1966
1484
errno = 0;
1967
1485
ret = seteuid(uid);
1968
1486
if(ret == -1){
1969
perror_plus("seteuid");
1487
perror("seteuid");
1970
1488
}
1971
1489
goto end;
1972
1490
}
1973
1491
}
1974
/* Sleep checking until interface is running.
1975
Check every 0.25s, up to total time of delay */
1492
/* sleep checking until interface is running */
1976
1493
for(int i=0; i < delay * 4; i++){
1977
1494
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1978
1495
if(ret == -1){
1979
perror_plus("ioctl SIOCGIFFLAGS");
1496
perror("ioctl SIOCGIFFLAGS");
1980
1497
} else if(network.ifr_flags & IFF_RUNNING){
1981
1498
break;
1982
1499
}
1983
1500
struct timespec sleeptime = { .tv_nsec = 250000000 };
1984
1501
ret = nanosleep(&sleeptime, NULL);
1985
1502
if(ret == -1 and errno != EINTR){
1986
perror_plus("nanosleep");
1503
perror("nanosleep");
1987
1504
}
1988
1505
}
1989
1506
if(not take_down_interface){
1990
1507
/* We won't need the socket anymore */
1991
1508
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1992
1509
if(ret == -1){
1993
perror_plus("close");
1510
perror("close");
1994
1511
}
1995
1512
}
1996
1513
#ifdef __linux__
1998
1515
/* Restores kernel loglevel to default */
1999
1516
ret = klogctl(7, NULL, 0);
2000
1517
if(ret == -1){
2001
perror_plus("klogctl");
1518
perror("klogctl");
2002
1519
}
2003
1520
}
2004
1521
#endif /* __linux__ */
2005
1522
/* Lower privileges */
2006
1523
errno = 0;
2007
/* Lower privileges */
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
1524
if(take_down_interface){
1525
/* Lower privileges */
1526
ret = seteuid(uid);
1527
if(ret == -1){
1528
perror("seteuid");
1529
}
1530
} else {
1531
/* Lower privileges permanently */
1532
ret = setuid(uid);
1533
if(ret == -1){
1534
perror("setuid");
1535
}
2011
1536
}
2012
1537
}
2013
1538
2017
1542
2018
1543
ret = init_gnutls_global(pubkey, seckey);
2019
1544
if(ret == -1){
2020
fprintf_plus(stderr, "init_gnutls_global failed\n");
1545
fprintf(stderr, "init_gnutls_global failed\n");
2021
1546
exitcode = EX_UNAVAILABLE;
2022
1547
goto end;
2023
1548
} else {
2028
1553
goto end;
2029
1554
}
2030
1555
1556
tempdir_created = true;
2031
1557
if(mkdtemp(tempdir) == NULL){
2032
perror_plus("mkdtemp");
1558
tempdir_created = false;
1559
perror("mkdtemp");
2033
1560
goto end;
2034
1561
}
2035
tempdir_created = true;
2036
1562
2037
1563
if(quit_now){
2038
1564
goto end;
2039
1565
}
2040
1566
2041
1567
if(not init_gpgme(pubkey, seckey, tempdir)){
2042
fprintf_plus(stderr, "init_gpgme failed\n");
1568
fprintf(stderr, "init_gpgme failed\n");
2043
1569
exitcode = EX_UNAVAILABLE;
2044
1570
goto end;
2045
1571
} else {
2055
1581
/* (Mainly meant for debugging) */
2056
1582
char *address = strrchr(connect_to, ':');
2057
1583
if(address == NULL){
2058
fprintf_plus(stderr, "No colon in address\n");
1584
fprintf(stderr, "No colon in address\n");
2059
1585
exitcode = EX_USAGE;
2060
1586
goto end;
2061
1587
}
2069
1595
tmpmax = strtoimax(address+1, &tmp, 10);
2070
1596
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2071
1597
or tmpmax != (uint16_t)tmpmax){
2072
fprintf_plus(stderr, "Bad port number\n");
1598
fprintf(stderr, "Bad port number\n");
2073
1599
exitcode = EX_USAGE;
2074
1600
goto end;
2075
1601
}
2080
1606
2081
1607
port = (uint16_t)tmpmax;
2082
1608
*address = '\0';
1609
address = connect_to;
2083
1610
/* Colon in address indicates IPv6 */
2084
1611
int af;
2085
if(strchr(connect_to, ':') != NULL){
1612
if(strchr(address, ':') != NULL){
2086
1613
af = AF_INET6;
2087
/* Accept [] around IPv6 address - see RFC 5952 */
2088
if(connect_to[0] == '[' and address[-1] == ']')
2089
{
2090
connect_to++;
2091
address[-1] = '\0';
2092
}
2093
1614
} else {
2094
1615
af = AF_INET;
2095
1616
}
2096
address = connect_to;
2097
1617
2098
1618
if(quit_now){
2099
1619
goto end;
2100
1620
}
2101
1621
2102
while(not quit_now){
2103
ret = start_mandos_communication(address, port, if_index, af);
2104
if(quit_now or ret == 0){
2105
break;
2106
}
2107
if(debug){
2108
fprintf_plus(stderr, "Retrying in %d seconds\n",
2109
(int)retry_interval);
2110
}
2111
sleep((int)retry_interval);
2112
}
2113
2114
if (not quit_now){
1622
ret = start_mandos_communication(address, port, if_index, af);
1623
if(ret < 0){
1624
switch(errno){
1625
case ENETUNREACH:
1626
case EHOSTDOWN:
1627
case EHOSTUNREACH:
1628
exitcode = EX_NOHOST;
1629
break;
1630
case EINVAL:
1631
exitcode = EX_USAGE;
1632
break;
1633
case EIO:
1634
exitcode = EX_IOERR;
1635
break;
1636
case EPROTO:
1637
exitcode = EX_PROTOCOL;
1638
break;
1639
default:
1640
exitcode = EX_OSERR;
1641
break;
1642
}
1643
} else {
2115
1644
exitcode = EXIT_SUCCESS;
2116
1645
}
2117
2118
1646
goto end;
2119
1647
}
2120
1648
2142
1670
2143
1671
/* Check if creating the Avahi server object succeeded */
2144
1672
if(mc.server == NULL){
2145
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2146
avahi_strerror(error));
1673
fprintf(stderr, "Failed to create Avahi server: %s\n",
1674
avahi_strerror(error));
2147
1675
exitcode = EX_UNAVAILABLE;
2148
1676
goto end;
2149
1677
}
2157
1685
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2158
1686
NULL, 0, browse_callback, NULL);
2159
1687
if(sb == NULL){
2160
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2161
avahi_strerror(avahi_server_errno(mc.server)));
1688
fprintf(stderr, "Failed to create service browser: %s\n",
1689
avahi_strerror(avahi_server_errno(mc.server)));
2162
1690
exitcode = EX_UNAVAILABLE;
2163
1691
goto end;
2164
1692
}
2170
1698
/* Run the main loop */
2171
1699
2172
1700
if(debug){
2173
fprintf_plus(stderr, "Starting Avahi loop search\n");
2174
}
2175
2176
ret = avahi_loop_with_timeout(mc.simple_poll,
2177
(int)(retry_interval * 1000));
2178
if(debug){
2179
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2180
(ret == 0) ? "successfully" : "with error");
2181
}
1701
fprintf(stderr, "Starting Avahi loop search\n");
1702
}
1703
1704
avahi_simple_poll_loop(mc.simple_poll);
2182
1705
2183
1706
end:
2184
1707
2185
1708
if(debug){
2186
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1709
fprintf(stderr, "%s exiting\n", argv[0]);
2187
1710
}
2188
1711
2189
1712
/* Cleanup things */
2206
1729
gpgme_release(mc.ctx);
2207
1730
}
2208
1731
2209
/* Cleans up the circular linked list of Mandos servers the client
2210
has seen */
2211
if(mc.current_server != NULL){
2212
mc.current_server->prev->next = NULL;
2213
while(mc.current_server != NULL){
2214
server *next = mc.current_server->next;
2215
free(mc.current_server);
2216
mc.current_server = next;
2217
}
2218
}
2219
2220
/* Re-raise priviliges */
2221
{
2222
if(getuid() == 0){
2223
errno = 0;
2224
ret = seteuid(0);
2225
if(ret == -1){
2226
perror_plus("seteuid");
2227
}
2228
}
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2233
/* Take down the network interface */
2234
if(take_down_interface and geteuid() == 0){
1732
/* Take down the network interface */
1733
if(take_down_interface){
1734
/* Re-raise priviliges */
1735
errno = 0;
1736
ret = seteuid(0);
1737
if(ret == -1){
1738
perror("seteuid");
1739
}
1740
if(geteuid() == 0){
2235
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2236
1742
if(ret == -1){
2237
perror_plus("ioctl SIOCGIFFLAGS");
2238
} else if(network.ifr_flags & IFF_UP){
1743
perror("ioctl SIOCGIFFLAGS");
1744
} else if(network.ifr_flags & IFF_UP) {
2239
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2240
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2241
1747
if(ret == -1){
2242
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2243
1749
}
2244
1750
}
2245
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2246
1752
if(ret == -1){
2247
perror_plus("close");
2248
}
2249
}
2250
}
2251
if(getuid() == 0){
2252
/* Lower privileges permanently */
2253
errno = 0;
2254
ret = setuid(uid);
2255
if(ret == -1){
2256
perror_plus("setuid");
1753
perror("close");
1754
}
1755
/* Lower privileges permanently */
1756
errno = 0;
1757
ret = setuid(uid);
1758
if(ret == -1){
1759
perror("setuid");
1760
}
2257
1761
}
2258
1762
}
2259
1763
2260
/* Removes the GPGME temp directory and all files inside */
1764
/* Removes the temp directory used by GPGME */
2261
1765
if(tempdir_created){
2262
struct dirent **direntries = NULL;
2263
struct dirent *direntry = NULL;
2264
int numentries = scandir(tempdir, &direntries, notdotentries,
2265
alphasort);
2266
if (numentries > 0){
2267
for(int i = 0; i < numentries; i++){
2268
direntry = direntries[i];
1766
DIR *d;
1767
struct dirent *direntry;
1768
d = opendir(tempdir);
1769
if(d == NULL){
1770
if(errno != ENOENT){
1771
perror("opendir");
1772
}
1773
} else {
1774
while(true){
1775
direntry = readdir(d);
1776
if(direntry == NULL){
1777
break;
1778
}
1779
/* Skip "." and ".." */
1780
if(direntry->d_name[0] == '.'
1781
and (direntry->d_name[1] == '\0'
1782
or (direntry->d_name[1] == '.'
1783
and direntry->d_name[2] == '\0'))){
1784
continue;
1785
}
2269
1786
char *fullname = NULL;
2270
1787
ret = asprintf(&fullname, "%s/%s", tempdir,
2271
1788
direntry->d_name);
2272
1789
if(ret < 0){
2273
perror_plus("asprintf");
1790
perror("asprintf");
2274
1791
continue;
2275
1792
}
2276
1793
ret = remove(fullname);
2277
1794
if(ret == -1){
2278
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2279
strerror(errno));
1795
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1796
strerror(errno));
2280
1797
}
2281
1798
free(fullname);
2282
1799
}
2283
}
2284
2285
/* need to clean even if 0 because man page doesn't specify */
2286
free(direntries);
2287
if (numentries == -1){
2288
perror_plus("scandir");
1800
closedir(d);
2289
1801
}
2290
1802
ret = rmdir(tempdir);
2291
1803
if(ret == -1 and errno != ENOENT){
2292
perror_plus("rmdir");
1804
perror("rmdir");
2293
1805
}
2294
1806
}
2295
1807
2300
1812
&old_sigterm_action,
2301
1813
NULL));
2302
1814
if(ret == -1){
2303
perror_plus("sigaction");
1815
perror("sigaction");
2304
1816
}
2305
1817
do {
2306
1818
ret = raise(signal_received);
2307
1819
} while(ret != 0 and errno == EINTR);
2308
1820
if(ret != 0){
2309
perror_plus("raise");
1821
perror("raise");
2310
1822
abort();
2311
1823
}
2312
1824
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0