To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 505.3.11
- compare with another revision
- download diff
- download tarball
- view history from revision 505.3.11
- Committer: Teddy Hogeborn
- Date: 2011-11-24 21:12:35 UTC
- mto: (505.2.9 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111124211235-drbwkp12g6fdn59c
* Makefile (run-client): Add "--network-hook-dir" option.
* plugin-runner.c (main): Only try to work around Debian bug #633582
if started as root.
* plugins.d/mandos-client.c (run_network_hooks): Bug fix: Run all
network hooks, not
just the first one.
Also add debug output.
(main): Only try to work around Debian bug #633582 or run network
hooks as root if started as root.
* plugin-runner.c (main): Only try to work around Debian bug #633582
if started as root.
* plugins.d/mandos-client.c (run_network_hooks): Bug fix: Run all
network hooks, not
just the first one.
Also add debug output.
(main): Only try to work around Debian bug #633582 or run network
hooks as root if started as root.
- files added:
- debian/source/local-options
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@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 */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
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>";
130
134
static const char sys_class_net[] = "/sys/class/net";
131
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;
132
148
133
149
/* Used for passing in values through the Avahi callback functions */
134
150
typedef struct {
139
155
gnutls_dh_params_t dh_params;
140
156
const char *priority;
141
157
gpgme_ctx_t ctx;
158
server *current_server;
142
159
} mandos_context;
143
160
144
161
/* global context so signal handler can reach it*/
145
162
mandos_context mc = { .simple_poll = NULL, .server = NULL,
146
163
.dh_bits = 1024, .priority = "SECURE256"
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
148
166
149
167
sig_atomic_t quit_now = 0;
150
168
int signal_received = 0;
151
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
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
152
186
/*
153
187
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
188
* bytes. "buffer_capacity" is how much is currently allocated,
155
189
* "buffer_length" is how much is already used.
156
190
*/
157
191
size_t incbuffer(char **buffer, size_t buffer_length,
158
size_t buffer_capacity){
192
size_t buffer_capacity){
159
193
if(buffer_length + BUFFER_SIZE > buffer_capacity){
160
194
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
161
195
if(buffer == NULL){
166
200
return buffer_capacity;
167
201
}
168
202
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
169
240
/*
170
241
* Initialize GPGME.
171
242
*/
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
174
245
gpgme_error_t rc;
175
246
gpgme_engine_info_t engine_info;
176
247
185
256
186
257
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
187
258
if(fd == -1){
188
perror("open");
259
perror_plus("open");
189
260
return false;
190
261
}
191
262
192
263
rc = gpgme_data_new_from_fd(&pgp_data, fd);
193
264
if(rc != GPG_ERR_NO_ERROR){
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
196
267
return false;
197
268
}
198
269
199
270
rc = gpgme_op_import(mc.ctx, pgp_data);
200
271
if(rc != GPG_ERR_NO_ERROR){
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
203
274
return false;
204
275
}
205
276
206
277
ret = (int)TEMP_FAILURE_RETRY(close(fd));
207
278
if(ret == -1){
208
perror("close");
279
perror_plus("close");
209
280
}
210
281
gpgme_data_release(pgp_data);
211
282
return true;
212
283
}
213
284
214
285
if(debug){
215
fprintf(stderr, "Initializing GPGME\n");
286
fprintf_plus(stderr, "Initializing GPGME\n");
216
287
}
217
288
218
289
/* Init GPGME */
219
290
gpgme_check_version(NULL);
220
291
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
221
292
if(rc != GPG_ERR_NO_ERROR){
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
224
295
return false;
225
296
}
226
297
227
/* Set GPGME home directory for the OpenPGP engine only */
298
/* Set GPGME home directory for the OpenPGP engine only */
228
299
rc = gpgme_get_engine_info(&engine_info);
229
300
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
232
303
return false;
233
304
}
234
305
while(engine_info != NULL){
240
311
engine_info = engine_info->next;
241
312
}
242
313
if(engine_info == NULL){
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
244
316
return false;
245
317
}
246
318
247
319
/* Create new GPGME "context" */
248
320
rc = gpgme_new(&(mc.ctx));
249
321
if(rc != GPG_ERR_NO_ERROR){
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
252
325
return false;
253
326
}
254
327
273
346
ssize_t plaintext_length = 0;
274
347
275
348
if(debug){
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
277
350
}
278
351
279
352
/* Create new GPGME data buffer from memory cryptotext */
280
353
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
281
354
0);
282
355
if(rc != GPG_ERR_NO_ERROR){
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
285
358
return -1;
286
359
}
287
360
288
361
/* Create new empty GPGME data buffer for the plaintext */
289
362
rc = gpgme_data_new(&dh_plain);
290
363
if(rc != GPG_ERR_NO_ERROR){
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
293
367
gpgme_data_release(dh_crypto);
294
368
return -1;
295
369
}
298
372
data buffer */
299
373
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
300
374
if(rc != GPG_ERR_NO_ERROR){
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
303
377
plaintext_length = -1;
304
378
if(debug){
305
379
gpgme_decrypt_result_t result;
306
380
result = gpgme_op_decrypt_result(mc.ctx);
307
381
if(result == NULL){
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
309
383
} else {
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
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);
314
388
if(result->file_name != NULL){
315
fprintf(stderr, "File name: %s\n", result->file_name);
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
316
390
}
317
391
gpgme_recipient_t recipient;
318
392
recipient = result->recipients;
319
393
while(recipient != NULL){
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");
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");
326
401
recipient = recipient->next;
327
402
}
328
403
}
331
406
}
332
407
333
408
if(debug){
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
335
410
}
336
411
337
412
/* Seek back to the beginning of the GPGME plaintext data buffer */
338
413
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
339
perror("gpgme_data_seek");
414
perror_plus("gpgme_data_seek");
340
415
plaintext_length = -1;
341
416
goto decrypt_end;
342
417
}
344
419
*plaintext = NULL;
345
420
while(true){
346
421
plaintext_capacity = incbuffer(plaintext,
347
(size_t)plaintext_length,
348
plaintext_capacity);
422
(size_t)plaintext_length,
423
plaintext_capacity);
349
424
if(plaintext_capacity == 0){
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
353
428
}
354
429
355
430
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
360
435
break;
361
436
}
362
437
if(ret < 0){
363
perror("gpgme_data_read");
438
perror_plus("gpgme_data_read");
364
439
plaintext_length = -1;
365
440
goto decrypt_end;
366
441
}
368
443
}
369
444
370
445
if(debug){
371
fprintf(stderr, "Decrypted password is: ");
446
fprintf_plus(stderr, "Decrypted password is: ");
372
447
for(ssize_t i = 0; i < plaintext_length; i++){
373
448
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
374
449
}
396
471
/* GnuTLS log function callback */
397
472
static void debuggnutls(__attribute__((unused)) int level,
398
473
const char* string){
399
fprintf(stderr, "GnuTLS: %s", string);
474
fprintf_plus(stderr, "GnuTLS: %s", string);
400
475
}
401
476
402
477
static int init_gnutls_global(const char *pubkeyfilename,
404
479
int ret;
405
480
406
481
if(debug){
407
fprintf(stderr, "Initializing GnuTLS\n");
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
408
483
}
409
484
410
485
ret = gnutls_global_init();
411
486
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
414
489
return -1;
415
490
}
416
491
423
498
}
424
499
425
500
/* OpenPGP credentials */
426
gnutls_certificate_allocate_credentials(&mc.cred);
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
427
502
if(ret != GNUTLS_E_SUCCESS){
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
432
safer_gnutls_strerror(ret));
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
433
505
gnutls_global_deinit();
434
506
return -1;
435
507
}
436
508
437
509
if(debug){
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
441
514
}
442
515
443
516
ret = gnutls_certificate_set_openpgp_key_file
444
517
(mc.cred, pubkeyfilename, seckeyfilename,
445
518
GNUTLS_OPENPGP_FMT_BASE64);
446
519
if(ret != GNUTLS_E_SUCCESS){
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));
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));
452
525
goto globalfail;
453
526
}
454
527
455
528
/* GnuTLS server initialization */
456
529
ret = gnutls_dh_params_init(&mc.dh_params);
457
530
if(ret != GNUTLS_E_SUCCESS){
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
460
534
goto globalfail;
461
535
}
462
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
463
537
if(ret != GNUTLS_E_SUCCESS){
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
466
540
goto globalfail;
467
541
}
468
542
488
562
}
489
563
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
490
564
if(ret != GNUTLS_E_SUCCESS){
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
493
568
}
494
569
495
570
{
502
577
}
503
578
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
504
579
if(ret != GNUTLS_E_SUCCESS){
505
fprintf(stderr, "Syntax error at: %s\n", err);
506
fprintf(stderr, "GnuTLS error: %s\n",
507
safer_gnutls_strerror(ret));
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
508
583
gnutls_deinit(*session);
509
584
return -1;
510
585
}
519
594
}
520
595
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
521
596
if(ret != GNUTLS_E_SUCCESS){
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
524
599
gnutls_deinit(*session);
525
600
return -1;
526
601
}
571
646
pf = PF_INET;
572
647
break;
573
648
default:
574
fprintf(stderr, "Bad address family: %d\n", af);
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
575
650
errno = EINVAL;
576
651
return -1;
577
652
}
582
657
}
583
658
584
659
if(debug){
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
587
662
}
588
663
589
664
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
665
if(tcp_sd < 0){
591
666
int e = errno;
592
perror("socket");
667
perror_plus("socket");
593
668
errno = e;
594
669
goto mandos_end;
595
670
}
609
684
}
610
685
if(ret < 0 ){
611
686
int e = errno;
612
perror("inet_pton");
687
perror_plus("inet_pton");
613
688
errno = e;
614
689
goto mandos_end;
615
690
}
616
691
if(ret == 0){
617
692
int e = errno;
618
fprintf(stderr, "Bad address: %s\n", ip);
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
619
694
errno = e;
620
695
goto mandos_end;
621
696
}
626
701
627
702
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
628
703
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
629
-Wunreachable-code*/
704
-Wunreachable-code*/
630
705
if(if_index == AVAHI_IF_UNSPEC){
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
633
708
errno = EINVAL;
634
709
goto mandos_end;
635
710
}
651
726
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
652
727
char interface[IF_NAMESIZE];
653
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
654
perror("if_indextoname");
729
perror_plus("if_indextoname");
655
730
} else {
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
658
733
}
659
734
} else {
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
662
737
}
663
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
664
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
671
746
sizeof(addrstr));
672
747
}
673
748
if(pcret == NULL){
674
perror("inet_ntop");
749
perror_plus("inet_ntop");
675
750
} else {
676
751
if(strcmp(addrstr, ip) != 0){
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
678
753
}
679
754
}
680
755
}
692
767
if(ret < 0){
693
768
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
769
int e = errno;
695
perror("connect");
770
perror_plus("connect");
696
771
errno = e;
697
772
}
698
773
goto mandos_end;
708
783
while(true){
709
784
size_t out_size = strlen(out);
710
785
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
711
out_size - written));
786
out_size - written));
712
787
if(ret == -1){
713
788
int e = errno;
714
perror("write");
789
perror_plus("write");
715
790
errno = e;
716
791
goto mandos_end;
717
792
}
734
809
}
735
810
736
811
if(debug){
737
fprintf(stderr, "Establishing TLS session with %s\n", ip);
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
738
813
}
739
814
740
815
if(quit_now){
742
817
goto mandos_end;
743
818
}
744
819
820
/* Spurious warning from -Wint-to-pointer-cast */
745
821
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
746
822
747
823
if(quit_now){
759
835
760
836
if(ret != GNUTLS_E_SUCCESS){
761
837
if(debug){
762
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
763
839
gnutls_perror(ret);
764
840
}
765
841
errno = EPROTO;
769
845
/* Read OpenPGP packet that contains the wanted password */
770
846
771
847
if(debug){
772
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
773
ip);
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
774
850
}
775
851
776
852
while(true){
781
857
}
782
858
783
859
buffer_capacity = incbuffer(&buffer, buffer_length,
784
buffer_capacity);
860
buffer_capacity);
785
861
if(buffer_capacity == 0){
786
862
int e = errno;
787
perror("incbuffer");
863
perror_plus("incbuffer");
788
864
errno = e;
789
865
goto mandos_end;
790
866
}
814
890
}
815
891
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
816
892
if(ret < 0){
817
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
818
895
gnutls_perror(ret);
819
896
errno = EPROTO;
820
897
goto mandos_end;
821
898
}
822
899
break;
823
900
default:
824
fprintf(stderr, "Unknown error while reading data from"
825
" encrypted session with Mandos server\n");
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
826
903
gnutls_bye(session, GNUTLS_SHUT_RDWR);
827
904
errno = EIO;
828
905
goto mandos_end;
833
910
}
834
911
835
912
if(debug){
836
fprintf(stderr, "Closing TLS session\n");
913
fprintf_plus(stderr, "Closing TLS session\n");
837
914
}
838
915
839
916
if(quit_now){
851
928
852
929
if(buffer_length > 0){
853
930
ssize_t decrypted_buffer_size;
854
decrypted_buffer_size = pgp_packet_decrypt(buffer,
855
buffer_length,
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
856
932
&decrypted_buffer);
857
933
if(decrypted_buffer_size >= 0){
858
934
869
945
if(ret == 0 and ferror(stdout)){
870
946
int e = errno;
871
947
if(debug){
872
fprintf(stderr, "Error writing encrypted data: %s\n",
873
strerror(errno));
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
874
950
}
875
951
errno = e;
876
952
goto mandos_end;
895
971
if(e == 0){
896
972
e = errno;
897
973
}
898
perror("close");
974
perror_plus("close");
899
975
}
900
976
gnutls_deinit(session);
977
errno = e;
901
978
if(quit_now){
902
e = EINTR;
979
errno = EINTR;
903
980
retval = -1;
904
981
}
905
errno = e;
906
982
}
907
983
return retval;
908
984
}
933
1009
switch(event){
934
1010
default:
935
1011
case AVAHI_RESOLVER_FAILURE:
936
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
937
" of type '%s' in domain '%s': %s\n", name, type, domain,
938
avahi_strerror(avahi_server_errno(mc.server)));
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)));
939
1016
break;
940
1017
941
1018
case AVAHI_RESOLVER_FOUND:
943
1020
char ip[AVAHI_ADDRESS_STR_MAX];
944
1021
avahi_address_snprint(ip, sizeof(ip), address);
945
1022
if(debug){
946
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
947
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
948
ip, (intmax_t)interface, port);
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);
949
1026
}
950
1027
int ret = start_mandos_communication(ip, port, interface,
951
1028
avahi_proto_to_af(proto));
952
1029
if(ret == 0){
953
1030
avahi_simple_poll_quit(mc.simple_poll);
1031
} else {
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
954
1034
}
955
1035
}
956
1036
}
980
1060
default:
981
1061
case AVAHI_BROWSER_FAILURE:
982
1062
983
fprintf(stderr, "(Avahi browser) %s\n",
984
avahi_strerror(avahi_server_errno(mc.server)));
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
985
1065
avahi_simple_poll_quit(mc.simple_poll);
986
1066
return;
987
1067
994
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
995
1075
name, type, domain, protocol, 0,
996
1076
resolve_callback, NULL) == NULL)
997
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
998
name, avahi_strerror(avahi_server_errno(mc.server)));
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
999
1080
break;
1000
1081
1001
1082
case AVAHI_BROWSER_REMOVE:
1004
1085
case AVAHI_BROWSER_ALL_FOR_NOW:
1005
1086
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1006
1087
if(debug){
1007
fprintf(stderr, "No Mandos server found, still searching...\n");
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1008
1090
}
1009
1091
break;
1010
1092
}
1011
1093
}
1012
1094
1013
/* stop main loop after sigterm has been called */
1095
/* Signal handler that stops main loop after SIGTERM */
1014
1096
static void handle_sigterm(int sig){
1015
1097
if(quit_now){
1016
1098
return;
1018
1100
quit_now = 1;
1019
1101
signal_received = sig;
1020
1102
int old_errno = errno;
1103
/* set main loop to exit */
1021
1104
if(mc.simple_poll != NULL){
1022
1105
avahi_simple_poll_quit(mc.simple_poll);
1023
1106
}
1024
1107
errno = old_errno;
1025
1108
}
1026
1109
1027
/*
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1031
*/
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
1042
return 0;
1043
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
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){
1081
1121
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1122
perror_plus("ioctl SIOCGIFFLAGS");
1084
1123
}
1085
free(flagstring);
1086
return 0;
1124
return false;
1087
1125
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1090
1131
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1092
1133
if(debug){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1095
1136
}
1096
return 0;
1137
return false;
1097
1138
}
1098
1139
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1100
1141
if(debug){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1103
1144
}
1104
return 1;
1145
return true;
1105
1146
}
1106
1147
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
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
1114
1164
/* Accept this device */
1115
1165
if(debug){
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
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
return 1;
1305
}
1306
1307
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1308
int ret;
1309
struct timespec now;
1310
struct timespec waited_time;
1311
intmax_t block_time;
1312
1313
while(true){
1314
if(mc.current_server == NULL){
1315
if (debug){
1316
fprintf_plus(stderr, "Wait until first server is found."
1317
" No timeout!\n");
1318
}
1319
ret = avahi_simple_poll_iterate(s, -1);
1320
} else {
1321
if (debug){
1322
fprintf_plus(stderr, "Check current_server if we should run"
1323
" it, or wait\n");
1324
}
1325
/* the current time */
1326
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1327
if(ret == -1){
1328
perror_plus("clock_gettime");
1329
return -1;
1330
}
1331
/* Calculating in ms how long time between now and server
1332
who we visted longest time ago. Now - last seen. */
1333
waited_time.tv_sec = (now.tv_sec
1334
- mc.current_server->last_seen.tv_sec);
1335
waited_time.tv_nsec = (now.tv_nsec
1336
- mc.current_server->last_seen.tv_nsec);
1337
/* total time is 10s/10,000ms.
1338
Converting to s from ms by dividing by 1,000,
1339
and ns to ms by dividing by 1,000,000. */
1340
block_time = ((retry_interval
1341
- ((intmax_t)waited_time.tv_sec * 1000))
1342
- ((intmax_t)waited_time.tv_nsec / 1000000));
1343
1344
if (debug){
1345
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1346
block_time);
1347
}
1348
1349
if(block_time <= 0){
1350
ret = start_mandos_communication(mc.current_server->ip,
1351
mc.current_server->port,
1352
mc.current_server->if_index,
1353
mc.current_server->af);
1354
if(ret == 0){
1355
avahi_simple_poll_quit(mc.simple_poll);
1356
return 0;
1357
}
1358
ret = clock_gettime(CLOCK_MONOTONIC,
1359
&mc.current_server->last_seen);
1360
if(ret == -1){
1361
perror_plus("clock_gettime");
1362
return -1;
1363
}
1364
mc.current_server = mc.current_server->next;
1365
block_time = 0; /* Call avahi to find new Mandos
1366
servers, but don't block */
1367
}
1368
1369
ret = avahi_simple_poll_iterate(s, (int)block_time);
1370
}
1371
if(ret != 0){
1372
if (ret > 0 or errno != EINTR){
1373
return (ret != 1) ? ret : 0;
1374
}
1375
}
1376
}
1377
}
1378
1379
bool run_network_hooks(const char *mode, const char *interface,
1380
const float delay){
1381
struct dirent **direntries;
1382
struct dirent *direntry;
1383
int ret;
1384
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1385
alphasort);
1386
if(numhooks == -1){
1387
perror_plus("scandir");
1388
} else {
1389
int devnull = open("/dev/null", O_RDONLY);
1390
for(int i = 0; i < numhooks; i++){
1391
direntry = direntries[i];
1392
char *fullname = NULL;
1393
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1394
if(ret < 0){
1395
perror_plus("asprintf");
1396
continue;
1397
}
1398
if(debug){
1399
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1400
direntry->d_name);
1401
}
1402
pid_t hook_pid = fork();
1403
if(hook_pid == 0){
1404
/* Child */
1405
dup2(devnull, STDIN_FILENO);
1406
close(devnull);
1407
dup2(STDERR_FILENO, STDOUT_FILENO);
1408
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1409
if(ret == -1){
1410
perror_plus("setenv");
1411
return false;
1412
}
1413
ret = setenv("DEVICE", interface, 1);
1414
if(ret == -1){
1415
perror_plus("setenv");
1416
return false;
1417
}
1418
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1419
if(ret == -1){
1420
perror_plus("setenv");
1421
return false;
1422
}
1423
ret = setenv("MODE", mode, 1);
1424
if(ret == -1){
1425
perror_plus("setenv");
1426
return false;
1427
}
1428
char *delaystring;
1429
ret = asprintf(&delaystring, "%f", delay);
1430
if(ret == -1){
1431
perror_plus("asprintf");
1432
return false;
1433
}
1434
ret = setenv("DELAY", delaystring, 1);
1435
if(ret == -1){
1436
free(delaystring);
1437
perror_plus("setenv");
1438
return false;
1439
}
1440
free(delaystring);
1441
ret = execl(fullname, direntry->d_name, mode, NULL);
1442
perror_plus("execl");
1443
} else {
1444
int status;
1445
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1446
perror_plus("waitpid");
1447
free(fullname);
1448
continue;
1449
}
1450
if(WIFEXITED(status)){
1451
if(WEXITSTATUS(status) != 0){
1452
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1453
" with status %d\n", direntry->d_name,
1454
WEXITSTATUS(status));
1455
free(fullname);
1456
continue;
1457
}
1458
} else if(WIFSIGNALED(status)){
1459
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1460
" signal %d\n", direntry->d_name,
1461
WTERMSIG(status));
1462
free(fullname);
1463
continue;
1464
} else {
1465
fprintf_plus(stderr, "Warning: network hook \"%s\""
1466
" crashed\n", direntry->d_name);
1467
free(fullname);
1468
continue;
1469
}
1470
}
1471
free(fullname);
1472
if(quit_now){
1473
break;
1474
}
1475
}
1476
close(devnull);
1477
}
1478
return true;
1120
1479
}
1121
1480
1122
1481
int main(int argc, char *argv[]){
1141
1500
bool gnutls_initialized = false;
1142
1501
bool gpgme_initialized = false;
1143
1502
float delay = 2.5f;
1503
double retry_interval = 10; /* 10s between trying a server and
1504
retrying the same server again */
1144
1505
1145
1506
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1146
1507
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1152
1513
errno = 0;
1153
1514
ret = setgid(gid);
1154
1515
if(ret == -1){
1155
perror("setgid");
1516
perror_plus("setgid");
1156
1517
}
1157
1518
1158
1519
/* Lower user privileges (temporarily) */
1159
1520
errno = 0;
1160
1521
ret = seteuid(uid);
1161
1522
if(ret == -1){
1162
perror("seteuid");
1523
perror_plus("seteuid");
1163
1524
}
1164
1525
1165
1526
if(quit_now){
1200
1561
.arg = "SECONDS",
1201
1562
.doc = "Maximum delay to wait for interface startup",
1202
1563
.group = 2 },
1564
{ .name = "retry", .key = 132,
1565
.arg = "SECONDS",
1566
.doc = "Retry interval used when denied by the mandos server",
1567
.group = 2 },
1568
{ .name = "network-hook-dir", .key = 133,
1569
.arg = "DIR",
1570
.doc = "Directory where network hooks are located",
1571
.group = 2 },
1203
1572
/*
1204
1573
* These reproduce what we would get without ARGP_NO_HELP
1205
1574
*/
1249
1618
if(errno != 0 or tmp == arg or *tmp != '\0'){
1250
1619
argp_error(state, "Bad delay");
1251
1620
}
1621
case 132: /* --retry */
1622
errno = 0;
1623
retry_interval = strtod(arg, &tmp);
1624
if(errno != 0 or tmp == arg or *tmp != '\0'
1625
or (retry_interval * 1000) > INT_MAX
1626
or retry_interval < 0){
1627
argp_error(state, "Bad retry interval");
1628
}
1629
break;
1630
case 133: /* --network-hook-dir */
1631
hookdir = arg;
1252
1632
break;
1253
1633
/*
1254
1634
* These reproduce what we would get without ARGP_NO_HELP
1261
1641
argp_state_help(state, state->out_stream,
1262
1642
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1263
1643
case 'V': /* --version */
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1644
fprintf_plus(state->out_stream,
1645
"Mandos plugin mandos-client: ");
1646
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1265
1647
exit(argp_err_exit_status);
1266
1648
break;
1267
1649
default:
1282
1664
case ENOMEM:
1283
1665
default:
1284
1666
errno = ret;
1285
perror("argp_parse");
1667
perror_plus("argp_parse");
1286
1668
exitcode = EX_OSERR;
1287
1669
goto end;
1288
1670
case EINVAL:
1290
1672
goto end;
1291
1673
}
1292
1674
}
1675
1676
if(getuid() == 0){
1677
/* Work around Debian bug #633582:
1678
<http://bugs.debian.org/633582> */
1679
struct stat st;
1680
1681
/* Re-raise priviliges */
1682
errno = 0;
1683
ret = seteuid(0);
1684
if(ret == -1){
1685
perror_plus("seteuid");
1686
}
1687
1688
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1689
int seckey_fd = open(seckey, O_RDONLY);
1690
if(seckey_fd == -1){
1691
perror_plus("open");
1692
} else {
1693
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1694
if(ret == -1){
1695
perror_plus("fstat");
1696
} else {
1697
if(S_ISREG(st.st_mode)
1698
and st.st_uid == 0 and st.st_gid == 0){
1699
ret = fchown(seckey_fd, uid, gid);
1700
if(ret == -1){
1701
perror_plus("fchown");
1702
}
1703
}
1704
}
1705
TEMP_FAILURE_RETRY(close(seckey_fd));
1706
}
1707
}
1708
1709
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1710
int pubkey_fd = open(pubkey, O_RDONLY);
1711
if(pubkey_fd == -1){
1712
perror_plus("open");
1713
} else {
1714
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1715
if(ret == -1){
1716
perror_plus("fstat");
1717
} else {
1718
if(S_ISREG(st.st_mode)
1719
and st.st_uid == 0 and st.st_gid == 0){
1720
ret = fchown(pubkey_fd, uid, gid);
1721
if(ret == -1){
1722
perror_plus("fchown");
1723
}
1724
}
1725
}
1726
TEMP_FAILURE_RETRY(close(pubkey_fd));
1727
}
1728
}
1729
1730
/* Lower privileges */
1731
errno = 0;
1732
ret = seteuid(uid);
1733
if(ret == -1){
1734
perror_plus("seteuid");
1735
}
1736
}
1737
1738
/* Run network hooks */
1739
{
1740
if(getuid() == 0){
1741
/* Re-raise priviliges */
1742
errno = 0;
1743
ret = seteuid(0);
1744
if(ret == -1){
1745
perror_plus("seteuid");
1746
}
1747
}
1748
if(not run_network_hooks("start", interface, delay)){
1749
goto end;
1750
}
1751
if(getuid() == 0){
1752
/* Lower privileges */
1753
errno = 0;
1754
ret = seteuid(uid);
1755
if(ret == -1){
1756
perror_plus("seteuid");
1757
}
1758
}
1759
}
1293
1760
1294
1761
if(not debug){
1295
1762
avahi_set_log_function(empty_log);
1296
1763
}
1297
1764
1298
1765
if(interface[0] == '\0'){
1299
1766
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1767
/* First look for interfaces that are up */
1768
ret = scandir(sys_class_net, &direntries, up_interface,
1301
1769
alphasort);
1770
if(ret == 0){
1771
/* No up interfaces, look for any good interfaces */
1772
free(direntries);
1773
ret = scandir(sys_class_net, &direntries, good_interface,
1774
alphasort);
1775
}
1302
1776
if(ret >= 1){
1303
/* Pick the first good interface */
1777
/* Pick the first interface returned */
1304
1778
interface = strdup(direntries[0]->d_name);
1305
1779
if(debug){
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1780
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1307
1781
}
1308
1782
if(interface == NULL){
1309
perror("malloc");
1783
perror_plus("malloc");
1310
1784
free(direntries);
1311
1785
exitcode = EXIT_FAILURE;
1312
1786
goto end;
1314
1788
free(direntries);
1315
1789
} else {
1316
1790
free(direntries);
1317
fprintf(stderr, "Could not find a network interface\n");
1791
fprintf_plus(stderr, "Could not find a network interface\n");
1318
1792
exitcode = EXIT_FAILURE;
1319
1793
goto end;
1320
1794
}
1326
1800
srand((unsigned int) time(NULL));
1327
1801
mc.simple_poll = avahi_simple_poll_new();
1328
1802
if(mc.simple_poll == NULL){
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1803
fprintf_plus(stderr,
1804
"Avahi: Failed to create simple poll object.\n");
1330
1805
exitcode = EX_UNAVAILABLE;
1331
1806
goto end;
1332
1807
}
1334
1809
sigemptyset(&sigterm_action.sa_mask);
1335
1810
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1336
1811
if(ret == -1){
1337
perror("sigaddset");
1812
perror_plus("sigaddset");
1338
1813
exitcode = EX_OSERR;
1339
1814
goto end;
1340
1815
}
1341
1816
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1342
1817
if(ret == -1){
1343
perror("sigaddset");
1818
perror_plus("sigaddset");
1344
1819
exitcode = EX_OSERR;
1345
1820
goto end;
1346
1821
}
1347
1822
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1348
1823
if(ret == -1){
1349
perror("sigaddset");
1824
perror_plus("sigaddset");
1350
1825
exitcode = EX_OSERR;
1351
1826
goto end;
1352
1827
}
1356
1831
*/
1357
1832
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1358
1833
if(ret == -1){
1359
perror("sigaction");
1834
perror_plus("sigaction");
1360
1835
return EX_OSERR;
1361
1836
}
1362
1837
if(old_sigterm_action.sa_handler != SIG_IGN){
1363
1838
ret = sigaction(SIGINT, &sigterm_action, NULL);
1364
1839
if(ret == -1){
1365
perror("sigaction");
1840
perror_plus("sigaction");
1366
1841
exitcode = EX_OSERR;
1367
1842
goto end;
1368
1843
}
1369
1844
}
1370
1845
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1371
1846
if(ret == -1){
1372
perror("sigaction");
1847
perror_plus("sigaction");
1373
1848
return EX_OSERR;
1374
1849
}
1375
1850
if(old_sigterm_action.sa_handler != SIG_IGN){
1376
1851
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1377
1852
if(ret == -1){
1378
perror("sigaction");
1853
perror_plus("sigaction");
1379
1854
exitcode = EX_OSERR;
1380
1855
goto end;
1381
1856
}
1382
1857
}
1383
1858
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1384
1859
if(ret == -1){
1385
perror("sigaction");
1860
perror_plus("sigaction");
1386
1861
return EX_OSERR;
1387
1862
}
1388
1863
if(old_sigterm_action.sa_handler != SIG_IGN){
1389
1864
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1390
1865
if(ret == -1){
1391
perror("sigaction");
1866
perror_plus("sigaction");
1392
1867
exitcode = EX_OSERR;
1393
1868
goto end;
1394
1869
}
1398
1873
if(strcmp(interface, "none") != 0){
1399
1874
if_index = (AvahiIfIndex) if_nametoindex(interface);
1400
1875
if(if_index == 0){
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1876
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1402
1877
exitcode = EX_UNAVAILABLE;
1403
1878
goto end;
1404
1879
}
1411
1886
errno = 0;
1412
1887
ret = seteuid(0);
1413
1888
if(ret == -1){
1414
perror("seteuid");
1889
perror_plus("seteuid");
1415
1890
}
1416
1891
1417
1892
#ifdef __linux__
1421
1896
bool restore_loglevel = true;
1422
1897
if(ret == -1){
1423
1898
restore_loglevel = false;
1424
perror("klogctl");
1899
perror_plus("klogctl");
1425
1900
}
1426
1901
#endif /* __linux__ */
1427
1902
1428
1903
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1429
1904
if(sd < 0){
1430
perror("socket");
1905
perror_plus("socket");
1431
1906
exitcode = EX_OSERR;
1432
1907
#ifdef __linux__
1433
1908
if(restore_loglevel){
1434
1909
ret = klogctl(7, NULL, 0);
1435
1910
if(ret == -1){
1436
perror("klogctl");
1911
perror_plus("klogctl");
1437
1912
}
1438
1913
}
1439
1914
#endif /* __linux__ */
1441
1916
errno = 0;
1442
1917
ret = seteuid(uid);
1443
1918
if(ret == -1){
1444
perror("seteuid");
1919
perror_plus("seteuid");
1445
1920
}
1446
1921
goto end;
1447
1922
}
1448
1923
strcpy(network.ifr_name, interface);
1449
1924
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1450
1925
if(ret == -1){
1451
perror("ioctl SIOCGIFFLAGS");
1926
perror_plus("ioctl SIOCGIFFLAGS");
1452
1927
#ifdef __linux__
1453
1928
if(restore_loglevel){
1454
1929
ret = klogctl(7, NULL, 0);
1455
1930
if(ret == -1){
1456
perror("klogctl");
1931
perror_plus("klogctl");
1457
1932
}
1458
1933
}
1459
1934
#endif /* __linux__ */
1462
1937
errno = 0;
1463
1938
ret = seteuid(uid);
1464
1939
if(ret == -1){
1465
perror("seteuid");
1940
perror_plus("seteuid");
1466
1941
}
1467
1942
goto end;
1468
1943
}
1472
1947
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1473
1948
if(ret == -1){
1474
1949
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1950
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1476
1951
exitcode = EX_OSERR;
1477
1952
#ifdef __linux__
1478
1953
if(restore_loglevel){
1479
1954
ret = klogctl(7, NULL, 0);
1480
1955
if(ret == -1){
1481
perror("klogctl");
1956
perror_plus("klogctl");
1482
1957
}
1483
1958
}
1484
1959
#endif /* __linux__ */
1486
1961
errno = 0;
1487
1962
ret = seteuid(uid);
1488
1963
if(ret == -1){
1489
perror("seteuid");
1964
perror_plus("seteuid");
1490
1965
}
1491
1966
goto end;
1492
1967
}
1493
1968
}
1494
/* sleep checking until interface is running */
1969
/* Sleep checking until interface is running.
1970
Check every 0.25s, up to total time of delay */
1495
1971
for(int i=0; i < delay * 4; i++){
1496
1972
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1497
1973
if(ret == -1){
1498
perror("ioctl SIOCGIFFLAGS");
1974
perror_plus("ioctl SIOCGIFFLAGS");
1499
1975
} else if(network.ifr_flags & IFF_RUNNING){
1500
1976
break;
1501
1977
}
1502
1978
struct timespec sleeptime = { .tv_nsec = 250000000 };
1503
1979
ret = nanosleep(&sleeptime, NULL);
1504
1980
if(ret == -1 and errno != EINTR){
1505
perror("nanosleep");
1981
perror_plus("nanosleep");
1506
1982
}
1507
1983
}
1508
1984
if(not take_down_interface){
1509
1985
/* We won't need the socket anymore */
1510
1986
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1511
1987
if(ret == -1){
1512
perror("close");
1988
perror_plus("close");
1513
1989
}
1514
1990
}
1515
1991
#ifdef __linux__
1517
1993
/* Restores kernel loglevel to default */
1518
1994
ret = klogctl(7, NULL, 0);
1519
1995
if(ret == -1){
1520
perror("klogctl");
1996
perror_plus("klogctl");
1521
1997
}
1522
1998
}
1523
1999
#endif /* __linux__ */
1524
2000
/* Lower privileges */
1525
2001
errno = 0;
1526
if(take_down_interface){
1527
/* Lower privileges */
1528
ret = seteuid(uid);
1529
if(ret == -1){
1530
perror("seteuid");
1531
}
1532
} else {
1533
/* Lower privileges permanently */
1534
ret = setuid(uid);
1535
if(ret == -1){
1536
perror("setuid");
1537
}
2002
/* Lower privileges */
2003
ret = seteuid(uid);
2004
if(ret == -1){
2005
perror_plus("seteuid");
1538
2006
}
1539
2007
}
1540
2008
1544
2012
1545
2013
ret = init_gnutls_global(pubkey, seckey);
1546
2014
if(ret == -1){
1547
fprintf(stderr, "init_gnutls_global failed\n");
2015
fprintf_plus(stderr, "init_gnutls_global failed\n");
1548
2016
exitcode = EX_UNAVAILABLE;
1549
2017
goto end;
1550
2018
} else {
1555
2023
goto end;
1556
2024
}
1557
2025
2026
if(mkdtemp(tempdir) == NULL){
2027
perror_plus("mkdtemp");
2028
goto end;
2029
}
1558
2030
tempdir_created = true;
1559
if(mkdtemp(tempdir) == NULL){
1560
tempdir_created = false;
1561
perror("mkdtemp");
1562
goto end;
1563
}
1564
2031
1565
2032
if(quit_now){
1566
2033
goto end;
1567
2034
}
1568
2035
1569
2036
if(not init_gpgme(pubkey, seckey, tempdir)){
1570
fprintf(stderr, "init_gpgme failed\n");
2037
fprintf_plus(stderr, "init_gpgme failed\n");
1571
2038
exitcode = EX_UNAVAILABLE;
1572
2039
goto end;
1573
2040
} else {
1583
2050
/* (Mainly meant for debugging) */
1584
2051
char *address = strrchr(connect_to, ':');
1585
2052
if(address == NULL){
1586
fprintf(stderr, "No colon in address\n");
2053
fprintf_plus(stderr, "No colon in address\n");
1587
2054
exitcode = EX_USAGE;
1588
2055
goto end;
1589
2056
}
1597
2064
tmpmax = strtoimax(address+1, &tmp, 10);
1598
2065
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1599
2066
or tmpmax != (uint16_t)tmpmax){
1600
fprintf(stderr, "Bad port number\n");
2067
fprintf_plus(stderr, "Bad port number\n");
1601
2068
exitcode = EX_USAGE;
1602
2069
goto end;
1603
2070
}
1608
2075
1609
2076
port = (uint16_t)tmpmax;
1610
2077
*address = '\0';
1611
address = connect_to;
1612
2078
/* Colon in address indicates IPv6 */
1613
2079
int af;
1614
if(strchr(address, ':') != NULL){
2080
if(strchr(connect_to, ':') != NULL){
1615
2081
af = AF_INET6;
2082
/* Accept [] around IPv6 address - see RFC 5952 */
2083
if(connect_to[0] == '[' and address[-1] == ']')
2084
{
2085
connect_to++;
2086
address[-1] = '\0';
2087
}
1616
2088
} else {
1617
2089
af = AF_INET;
1618
2090
}
2091
address = connect_to;
1619
2092
1620
2093
if(quit_now){
1621
2094
goto end;
1622
2095
}
1623
2096
1624
2097
while(not quit_now){
1625
2098
ret = start_mandos_communication(address, port, if_index, af);
1626
2099
if(quit_now or ret == 0){
1627
2100
break;
1628
2101
}
1629
sleep(15);
1630
};
1631
2102
if(debug){
2103
fprintf_plus(stderr, "Retrying in %d seconds\n",
2104
(int)retry_interval);
2105
}
2106
sleep((int)retry_interval);
2107
}
2108
1632
2109
if (not quit_now){
1633
2110
exitcode = EXIT_SUCCESS;
1634
2111
}
1635
2112
1636
2113
goto end;
1637
2114
}
1638
2115
1660
2137
1661
2138
/* Check if creating the Avahi server object succeeded */
1662
2139
if(mc.server == NULL){
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
1664
avahi_strerror(error));
2140
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2141
avahi_strerror(error));
1665
2142
exitcode = EX_UNAVAILABLE;
1666
2143
goto end;
1667
2144
}
1675
2152
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1676
2153
NULL, 0, browse_callback, NULL);
1677
2154
if(sb == NULL){
1678
fprintf(stderr, "Failed to create service browser: %s\n",
1679
avahi_strerror(avahi_server_errno(mc.server)));
2155
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2156
avahi_strerror(avahi_server_errno(mc.server)));
1680
2157
exitcode = EX_UNAVAILABLE;
1681
2158
goto end;
1682
2159
}
1688
2165
/* Run the main loop */
1689
2166
1690
2167
if(debug){
1691
fprintf(stderr, "Starting Avahi loop search\n");
1692
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2168
fprintf_plus(stderr, "Starting Avahi loop search\n");
2169
}
2170
2171
ret = avahi_loop_with_timeout(mc.simple_poll,
2172
(int)(retry_interval * 1000));
2173
if(debug){
2174
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2175
(ret == 0) ? "successfully" : "with error");
2176
}
1695
2177
1696
2178
end:
1697
2179
1698
2180
if(debug){
1699
fprintf(stderr, "%s exiting\n", argv[0]);
2181
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1700
2182
}
1701
2183
1702
2184
/* Cleanup things */
1718
2200
if(gpgme_initialized){
1719
2201
gpgme_release(mc.ctx);
1720
2202
}
2203
2204
/* Cleans up the circular linked list of Mandos servers the client
2205
has seen */
2206
if(mc.current_server != NULL){
2207
mc.current_server->prev->next = NULL;
2208
while(mc.current_server != NULL){
2209
server *next = mc.current_server->next;
2210
free(mc.current_server);
2211
mc.current_server = next;
2212
}
2213
}
1721
2214
1722
/* Take down the network interface */
1723
if(take_down_interface){
1724
/* Re-raise priviliges */
1725
errno = 0;
1726
ret = seteuid(0);
1727
if(ret == -1){
1728
perror("seteuid");
1729
}
1730
if(geteuid() == 0){
2215
/* Re-raise priviliges */
2216
{
2217
if(getuid() == 0){
2218
errno = 0;
2219
ret = seteuid(0);
2220
if(ret == -1){
2221
perror_plus("seteuid");
2222
}
2223
}
2224
/* Run network hooks */
2225
if(not run_network_hooks("stop", interface, delay)){
2226
goto end;
2227
}
2228
2229
/* Take down the network interface */
2230
if(take_down_interface and geteuid() == 0){
1731
2231
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1732
2232
if(ret == -1){
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
2233
perror_plus("ioctl SIOCGIFFLAGS");
2234
} else if(network.ifr_flags & IFF_UP){
1735
2235
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1736
2236
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1737
2237
if(ret == -1){
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2238
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1739
2239
}
1740
2240
}
1741
2241
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1742
2242
if(ret == -1){
1743
perror("close");
1744
}
1745
/* Lower privileges permanently */
1746
errno = 0;
1747
ret = setuid(uid);
1748
if(ret == -1){
1749
perror("setuid");
1750
}
2243
perror_plus("close");
2244
}
2245
}
2246
}
2247
if(getuid() == 0){
2248
/* Lower privileges permanently */
2249
errno = 0;
2250
ret = setuid(uid);
2251
if(ret == -1){
2252
perror_plus("setuid");
1751
2253
}
1752
2254
}
1753
2255
1754
/* Removes the temp directory used by GPGME */
2256
/* Removes the GPGME temp directory and all files inside */
1755
2257
if(tempdir_created){
1756
DIR *d;
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1759
if(d == NULL){
1760
if(errno != ENOENT){
1761
perror("opendir");
1762
}
1763
} else {
1764
while(true){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1767
break;
1768
}
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1774
continue;
1775
}
2258
struct dirent **direntries = NULL;
2259
struct dirent *direntry = NULL;
2260
int numentries = scandir(tempdir, &direntries, notdotentries,
2261
alphasort);
2262
if (numentries > 0){
2263
for(int i = 0; i < numentries; i++){
2264
direntry = direntries[i];
1776
2265
char *fullname = NULL;
1777
2266
ret = asprintf(&fullname, "%s/%s", tempdir,
1778
2267
direntry->d_name);
1779
2268
if(ret < 0){
1780
perror("asprintf");
2269
perror_plus("asprintf");
1781
2270
continue;
1782
2271
}
1783
2272
ret = remove(fullname);
1784
2273
if(ret == -1){
1785
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1786
strerror(errno));
2274
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2275
strerror(errno));
1787
2276
}
1788
2277
free(fullname);
1789
2278
}
1790
closedir(d);
2279
}
2280
2281
/* need to clean even if 0 because man page doesn't specify */
2282
free(direntries);
2283
if (numentries == -1){
2284
perror_plus("scandir");
1791
2285
}
1792
2286
ret = rmdir(tempdir);
1793
2287
if(ret == -1 and errno != ENOENT){
1794
perror("rmdir");
2288
perror_plus("rmdir");
1795
2289
}
1796
2290
}
1797
2291
1802
2296
&old_sigterm_action,
1803
2297
NULL));
1804
2298
if(ret == -1){
1805
perror("sigaction");
2299
perror_plus("sigaction");
1806
2300
}
1807
2301
do {
1808
2302
ret = raise(signal_received);
1809
2303
} while(ret != 0 and errno == EINTR);
1810
2304
if(ret != 0){
1811
perror("raise");
2305
perror_plus("raise");
1812
2306
abort();
1813
2307
}
1814
2308
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0