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- Committer: Teddy Hogeborn
- Date: 2010-09-28 18:57:31 UTC
- mto: (24.1.170 mandos) (237.4.29 release)
- mto: This revision was merged to the branch mainline in revision 450.
- Revision ID: teddy@fukt.bsnet.se-20100928185731-w21rqjsqn6w28c7m
Tags: version-1.2-1
* Makefile (version): Changed to "1.2".
* NEWS (Version 1.2): New entry.
* debian/changelog (1.2): - '' -
* NEWS (Version 1.2): New entry.
* debian/changelog (1.2): - '' -
- 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 © 2008-2010 Teddy Hogeborn
13
* Copyright © 2008-2010 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 */
65
#include <errno.h> /* perror(), errno */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
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
#include <grp.h> /* setgroups() */
91
87
92
88
#ifdef __linux__
93
89
#include <sys/klog.h> /* klogctl() */
111
107
init_gnutls_session(),
112
108
GNUTLS_* */
113
109
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
116
112
117
113
/* GPGME */
118
114
#include <gpgme.h> /* All GPGME types, constants and
126
122
#define PATHDIR "/conf/conf.d/mandos"
127
123
#define SECKEY "seckey.txt"
128
124
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
130
125
131
126
bool debug = false;
132
127
static const char mandos_protocol_version[] = "1";
133
128
const char *argp_program_version = "mandos-client " VERSION;
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
130
static const char sys_class_net[] = "/sys/class/net";
136
131
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
139
/* Doubly linked list that need to be circularly linked when used */
140
typedef struct server{
141
const char *ip;
142
uint16_t port;
143
AvahiIfIndex if_index;
144
int af;
145
struct timespec last_seen;
146
struct server *next;
147
struct server *prev;
148
} server;
149
132
150
133
/* Used for passing in values through the Avahi callback functions */
151
134
typedef struct {
156
139
gnutls_dh_params_t dh_params;
157
140
const char *priority;
158
141
gpgme_ctx_t ctx;
159
server *current_server;
160
142
} mandos_context;
161
143
162
144
/* global context so signal handler can reach it*/
163
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
164
146
.dh_bits = 1024, .priority = "SECURE256"
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
167
148
168
149
sig_atomic_t quit_now = 0;
169
150
int signal_received = 0;
170
151
171
/* Function to use when printing errors */
172
void perror_plus(const char *print_text){
173
fprintf(stderr, "Mandos plugin %s: ",
174
program_invocation_short_name);
175
perror(print_text);
176
}
177
178
__attribute__((format (gnu_printf, 2, 3)))
179
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_list ap;
181
va_start (ap, format);
182
183
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
184
program_invocation_short_name));
185
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
186
}
187
188
152
/*
189
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
190
154
* bytes. "buffer_capacity" is how much is currently allocated,
191
155
* "buffer_length" is how much is already used.
192
156
*/
193
157
size_t incbuffer(char **buffer, size_t buffer_length,
194
size_t buffer_capacity){
158
size_t buffer_capacity){
195
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
196
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
197
161
if(buffer == NULL){
202
166
return buffer_capacity;
203
167
}
204
168
205
/* Add server to set of servers to retry periodically */
206
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
int af){
208
int ret;
209
server *new_server = malloc(sizeof(server));
210
if(new_server == NULL){
211
perror_plus("malloc");
212
return false;
213
}
214
*new_server = (server){ .ip = strdup(ip),
215
.port = port,
216
.if_index = if_index,
217
.af = af };
218
if(new_server->ip == NULL){
219
perror_plus("strdup");
220
return false;
221
}
222
/* Special case of first server */
223
if (mc.current_server == NULL){
224
new_server->next = new_server;
225
new_server->prev = new_server;
226
mc.current_server = new_server;
227
/* Place the new server last in the list */
228
} else {
229
new_server->next = mc.current_server;
230
new_server->prev = mc.current_server->prev;
231
new_server->prev->next = new_server;
232
mc.current_server->prev = new_server;
233
}
234
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
235
if(ret == -1){
236
perror_plus("clock_gettime");
237
return false;
238
}
239
return true;
240
}
241
242
169
/*
243
170
* Initialize GPGME.
244
171
*/
245
static bool init_gpgme(const char *seckey, const char *pubkey,
246
const char *tempdir){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
247
174
gpgme_error_t rc;
248
175
gpgme_engine_info_t engine_info;
249
176
258
185
259
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
260
187
if(fd == -1){
261
perror_plus("open");
188
perror("open");
262
189
return false;
263
190
}
264
191
265
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
266
193
if(rc != GPG_ERR_NO_ERROR){
267
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
268
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));
269
196
return false;
270
197
}
271
198
272
199
rc = gpgme_op_import(mc.ctx, pgp_data);
273
200
if(rc != GPG_ERR_NO_ERROR){
274
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
276
203
return false;
277
204
}
278
205
279
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
280
207
if(ret == -1){
281
perror_plus("close");
208
perror("close");
282
209
}
283
210
gpgme_data_release(pgp_data);
284
211
return true;
285
212
}
286
213
287
214
if(debug){
288
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
289
216
}
290
217
291
218
/* Init GPGME */
292
219
gpgme_check_version(NULL);
293
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
294
221
if(rc != GPG_ERR_NO_ERROR){
295
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
296
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
297
224
return false;
298
225
}
299
226
300
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
301
228
rc = gpgme_get_engine_info(&engine_info);
302
229
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
305
232
return false;
306
233
}
307
234
while(engine_info != NULL){
313
240
engine_info = engine_info->next;
314
241
}
315
242
if(engine_info == NULL){
316
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
317
tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
318
244
return false;
319
245
}
320
246
321
247
/* Create new GPGME "context" */
322
248
rc = gpgme_new(&(mc.ctx));
323
249
if(rc != GPG_ERR_NO_ERROR){
324
fprintf_plus(stderr, "Mandos plugin mandos-client: "
325
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
326
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
327
252
return false;
328
253
}
329
254
348
273
ssize_t plaintext_length = 0;
349
274
350
275
if(debug){
351
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
352
277
}
353
278
354
279
/* Create new GPGME data buffer from memory cryptotext */
355
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
356
281
0);
357
282
if(rc != GPG_ERR_NO_ERROR){
358
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
359
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));
360
285
return -1;
361
286
}
362
287
363
288
/* Create new empty GPGME data buffer for the plaintext */
364
289
rc = gpgme_data_new(&dh_plain);
365
290
if(rc != GPG_ERR_NO_ERROR){
366
fprintf_plus(stderr, "Mandos plugin mandos-client: "
367
"bad gpgme_data_new: %s: %s\n",
368
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
369
293
gpgme_data_release(dh_crypto);
370
294
return -1;
371
295
}
374
298
data buffer */
375
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
376
300
if(rc != GPG_ERR_NO_ERROR){
377
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
379
303
plaintext_length = -1;
380
304
if(debug){
381
305
gpgme_decrypt_result_t result;
382
306
result = gpgme_op_decrypt_result(mc.ctx);
383
307
if(result == NULL){
384
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
385
309
} else {
386
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf_plus(stderr, "Wrong key usage: %u\n",
389
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);
390
314
if(result->file_name != NULL){
391
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
392
316
}
393
317
gpgme_recipient_t recipient;
394
318
recipient = result->recipients;
395
319
while(recipient != NULL){
396
fprintf_plus(stderr, "Public key algorithm: %s\n",
397
gpgme_pubkey_algo_name
398
(recipient->pubkey_algo));
399
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
400
fprintf_plus(stderr, "Secret key available: %s\n",
401
recipient->status == GPG_ERR_NO_SECKEY
402
? "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");
403
326
recipient = recipient->next;
404
327
}
405
328
}
408
331
}
409
332
410
333
if(debug){
411
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
412
335
}
413
336
414
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
415
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
416
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
417
340
plaintext_length = -1;
418
341
goto decrypt_end;
419
342
}
421
344
*plaintext = NULL;
422
345
while(true){
423
346
plaintext_capacity = incbuffer(plaintext,
424
(size_t)plaintext_length,
425
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
426
349
if(plaintext_capacity == 0){
427
perror_plus("incbuffer");
428
plaintext_length = -1;
429
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
430
353
}
431
354
432
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
437
360
break;
438
361
}
439
362
if(ret < 0){
440
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
441
364
plaintext_length = -1;
442
365
goto decrypt_end;
443
366
}
445
368
}
446
369
447
370
if(debug){
448
fprintf_plus(stderr, "Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
449
372
for(ssize_t i = 0; i < plaintext_length; i++){
450
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
451
374
}
473
396
/* GnuTLS log function callback */
474
397
static void debuggnutls(__attribute__((unused)) int level,
475
398
const char* string){
476
fprintf_plus(stderr, "GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
477
400
}
478
401
479
402
static int init_gnutls_global(const char *pubkeyfilename,
481
404
int ret;
482
405
483
406
if(debug){
484
fprintf_plus(stderr, "Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
485
408
}
486
409
487
410
ret = gnutls_global_init();
488
411
if(ret != GNUTLS_E_SUCCESS){
489
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
490
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
491
414
return -1;
492
415
}
493
416
500
423
}
501
424
502
425
/* OpenPGP credentials */
503
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
504
427
if(ret != GNUTLS_E_SUCCESS){
505
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
506
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));
507
433
gnutls_global_deinit();
508
434
return -1;
509
435
}
510
436
511
437
if(debug){
512
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
513
" secret key %s as GnuTLS credentials\n",
514
pubkeyfilename,
515
seckeyfilename);
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
516
441
}
517
442
518
443
ret = gnutls_certificate_set_openpgp_key_file
519
444
(mc.cred, pubkeyfilename, seckeyfilename,
520
445
GNUTLS_OPENPGP_FMT_BASE64);
521
446
if(ret != GNUTLS_E_SUCCESS){
522
fprintf_plus(stderr,
523
"Error[%d] while reading the OpenPGP key pair ('%s',"
524
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
525
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
526
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));
527
452
goto globalfail;
528
453
}
529
454
530
455
/* GnuTLS server initialization */
531
456
ret = gnutls_dh_params_init(&mc.dh_params);
532
457
if(ret != GNUTLS_E_SUCCESS){
533
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
534
" initialization: %s\n",
535
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
536
460
goto globalfail;
537
461
}
538
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
539
463
if(ret != GNUTLS_E_SUCCESS){
540
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
541
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
542
466
goto globalfail;
543
467
}
544
468
564
488
}
565
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
566
490
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr,
568
"Error in GnuTLS session initialization: %s\n",
569
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
570
493
}
571
494
572
495
{
579
502
}
580
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
581
504
if(ret != GNUTLS_E_SUCCESS){
582
fprintf_plus(stderr, "Syntax error at: %s\n", err);
583
fprintf_plus(stderr, "GnuTLS error: %s\n",
584
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));
585
508
gnutls_deinit(*session);
586
509
return -1;
587
510
}
596
519
}
597
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
598
521
if(ret != GNUTLS_E_SUCCESS){
599
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
600
safer_gnutls_strerror(ret));
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
601
524
gnutls_deinit(*session);
602
525
return -1;
603
526
}
648
571
pf = PF_INET;
649
572
break;
650
573
default:
651
fprintf_plus(stderr, "Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
652
575
errno = EINVAL;
653
576
return -1;
654
577
}
659
582
}
660
583
661
584
if(debug){
662
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
663
PRIu16 "\n", ip, port);
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
664
587
}
665
588
666
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
667
590
if(tcp_sd < 0){
668
591
int e = errno;
669
perror_plus("socket");
592
perror("socket");
670
593
errno = e;
671
594
goto mandos_end;
672
595
}
686
609
}
687
610
if(ret < 0 ){
688
611
int e = errno;
689
perror_plus("inet_pton");
612
perror("inet_pton");
690
613
errno = e;
691
614
goto mandos_end;
692
615
}
693
616
if(ret == 0){
694
617
int e = errno;
695
fprintf_plus(stderr, "Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
696
619
errno = e;
697
620
goto mandos_end;
698
621
}
703
626
704
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
705
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
706
-Wunreachable-code*/
629
-Wunreachable-code*/
707
630
if(if_index == AVAHI_IF_UNSPEC){
708
fprintf_plus(stderr, "An IPv6 link-local address is"
709
" incomplete without a network interface\n");
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
710
633
errno = EINVAL;
711
634
goto mandos_end;
712
635
}
728
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
729
652
char interface[IF_NAMESIZE];
730
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
731
perror_plus("if_indextoname");
654
perror("if_indextoname");
732
655
} else {
733
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
734
"\n", ip, interface, port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
735
658
}
736
659
} else {
737
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
738
ip, port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
739
662
}
740
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
741
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
748
671
sizeof(addrstr));
749
672
}
750
673
if(pcret == NULL){
751
perror_plus("inet_ntop");
674
perror("inet_ntop");
752
675
} else {
753
676
if(strcmp(addrstr, ip) != 0){
754
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
755
678
}
756
679
}
757
680
}
769
692
if(ret < 0){
770
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
694
int e = errno;
772
perror_plus("connect");
695
perror("connect");
773
696
errno = e;
774
697
}
775
698
goto mandos_end;
785
708
while(true){
786
709
size_t out_size = strlen(out);
787
710
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
788
out_size - written));
711
out_size - written));
789
712
if(ret == -1){
790
713
int e = errno;
791
perror_plus("write");
714
perror("write");
792
715
errno = e;
793
716
goto mandos_end;
794
717
}
811
734
}
812
735
813
736
if(debug){
814
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
737
fprintf(stderr, "Establishing TLS session with %s\n", ip);
815
738
}
816
739
817
740
if(quit_now){
819
742
goto mandos_end;
820
743
}
821
744
822
/* Spurious warning from -Wint-to-pointer-cast */
823
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
824
746
825
747
if(quit_now){
837
759
838
760
if(ret != GNUTLS_E_SUCCESS){
839
761
if(debug){
840
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
762
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
841
763
gnutls_perror(ret);
842
764
}
843
765
errno = EPROTO;
847
769
/* Read OpenPGP packet that contains the wanted password */
848
770
849
771
if(debug){
850
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
851
" %s\n", ip);
772
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
773
ip);
852
774
}
853
775
854
776
while(true){
859
781
}
860
782
861
783
buffer_capacity = incbuffer(&buffer, buffer_length,
862
buffer_capacity);
784
buffer_capacity);
863
785
if(buffer_capacity == 0){
864
786
int e = errno;
865
perror_plus("incbuffer");
787
perror("incbuffer");
866
788
errno = e;
867
789
goto mandos_end;
868
790
}
892
814
}
893
815
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
894
816
if(ret < 0){
895
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
896
"***\n");
817
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
897
818
gnutls_perror(ret);
898
819
errno = EPROTO;
899
820
goto mandos_end;
900
821
}
901
822
break;
902
823
default:
903
fprintf_plus(stderr, "Unknown error while reading data from"
904
" encrypted session with Mandos server\n");
824
fprintf(stderr, "Unknown error while reading data from"
825
" encrypted session with Mandos server\n");
905
826
gnutls_bye(session, GNUTLS_SHUT_RDWR);
906
827
errno = EIO;
907
828
goto mandos_end;
912
833
}
913
834
914
835
if(debug){
915
fprintf_plus(stderr, "Closing TLS session\n");
836
fprintf(stderr, "Closing TLS session\n");
916
837
}
917
838
918
839
if(quit_now){
930
851
931
852
if(buffer_length > 0){
932
853
ssize_t decrypted_buffer_size;
933
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
854
decrypted_buffer_size = pgp_packet_decrypt(buffer,
855
buffer_length,
934
856
&decrypted_buffer);
935
857
if(decrypted_buffer_size >= 0){
936
858
947
869
if(ret == 0 and ferror(stdout)){
948
870
int e = errno;
949
871
if(debug){
950
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
951
strerror(errno));
872
fprintf(stderr, "Error writing encrypted data: %s\n",
873
strerror(errno));
952
874
}
953
875
errno = e;
954
876
goto mandos_end;
973
895
if(e == 0){
974
896
e = errno;
975
897
}
976
perror_plus("close");
898
perror("close");
977
899
}
978
900
gnutls_deinit(session);
979
errno = e;
980
901
if(quit_now){
981
errno = EINTR;
902
e = EINTR;
982
903
retval = -1;
983
904
}
905
errno = e;
984
906
}
985
907
return retval;
986
908
}
1011
933
switch(event){
1012
934
default:
1013
935
case AVAHI_RESOLVER_FAILURE:
1014
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1015
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
domain,
1017
avahi_strerror(avahi_server_errno(mc.server)));
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)));
1018
939
break;
1019
940
1020
941
case AVAHI_RESOLVER_FOUND:
1022
943
char ip[AVAHI_ADDRESS_STR_MAX];
1023
944
avahi_address_snprint(ip, sizeof(ip), address);
1024
945
if(debug){
1025
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1026
PRIdMAX ") on port %" PRIu16 "\n", name,
1027
host_name, ip, (intmax_t)interface, port);
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);
1028
949
}
1029
950
int ret = start_mandos_communication(ip, port, interface,
1030
951
avahi_proto_to_af(proto));
1031
952
if(ret == 0){
1032
953
avahi_simple_poll_quit(mc.simple_poll);
1033
} else {
1034
if(not add_server(ip, port, interface,
1035
avahi_proto_to_af(proto))){
1036
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1037
" list\n", name);
1038
}
1039
954
}
1040
955
}
1041
956
}
1065
980
default:
1066
981
case AVAHI_BROWSER_FAILURE:
1067
982
1068
fprintf_plus(stderr, "(Avahi browser) %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
983
fprintf(stderr, "(Avahi browser) %s\n",
984
avahi_strerror(avahi_server_errno(mc.server)));
1070
985
avahi_simple_poll_quit(mc.simple_poll);
1071
986
return;
1072
987
1079
994
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1080
995
name, type, domain, protocol, 0,
1081
996
resolve_callback, NULL) == NULL)
1082
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1083
" %s\n", name,
1084
avahi_strerror(avahi_server_errno(mc.server)));
997
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
998
name, avahi_strerror(avahi_server_errno(mc.server)));
1085
999
break;
1086
1000
1087
1001
case AVAHI_BROWSER_REMOVE:
1090
1004
case AVAHI_BROWSER_ALL_FOR_NOW:
1091
1005
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1092
1006
if(debug){
1093
fprintf_plus(stderr, "No Mandos server found, still"
1094
" searching...\n");
1007
fprintf(stderr, "No Mandos server found, still searching...\n");
1095
1008
}
1096
1009
break;
1097
1010
}
1098
1011
}
1099
1012
1100
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1101
1014
static void handle_sigterm(int sig){
1102
1015
if(quit_now){
1103
1016
return;
1105
1018
quit_now = 1;
1106
1019
signal_received = sig;
1107
1020
int old_errno = errno;
1108
/* set main loop to exit */
1109
1021
if(mc.simple_poll != NULL){
1110
1022
avahi_simple_poll_quit(mc.simple_poll);
1111
1023
}
1112
1024
errno = old_errno;
1113
1025
}
1114
1026
1115
bool get_flags(const char *ifname, struct ifreq *ifr){
1116
int ret;
1117
1118
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1119
if(s < 0){
1120
perror_plus("socket");
1121
return false;
1122
}
1123
strcpy(ifr->ifr_name, ifname);
1124
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1125
if(ret == -1){
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){
1126
1081
if(debug){
1127
perror_plus("ioctl SIOCGIFFLAGS");
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1128
1084
}
1129
return false;
1085
free(flagstring);
1086
return 0;
1130
1087
}
1131
return true;
1132
}
1133
1134
bool good_flags(const char *ifname, const struct ifreq *ifr){
1135
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1136
1090
/* Reject the loopback device */
1137
if(ifr->ifr_flags & IFF_LOOPBACK){
1091
if(flags & IFF_LOOPBACK){
1138
1092
if(debug){
1139
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1140
ifname);
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1141
1095
}
1142
return false;
1096
return 0;
1143
1097
}
1144
1098
/* Accept point-to-point devices only if connect_to is specified */
1145
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1146
1100
if(debug){
1147
fprintf_plus(stderr, "Accepting point-to-point interface"
1148
" \"%s\"\n", ifname);
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1149
1103
}
1150
return true;
1104
return 1;
1151
1105
}
1152
1106
/* Otherwise, reject non-broadcast-capable devices */
1153
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1154
if(debug){
1155
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1156
" \"%s\"\n", ifname);
1157
}
1158
return false;
1159
}
1160
/* Reject non-ARP interfaces (including dummy interfaces) */
1161
if(ifr->ifr_flags & IFF_NOARP){
1162
if(debug){
1163
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
ifname);
1165
}
1166
return false;
1167
}
1168
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
}
1169
1114
/* Accept this device */
1170
1115
if(debug){
1171
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1172
}
1173
return true;
1174
}
1175
1176
/*
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device.
1179
* (This function is passed to scandir(3) as a filter function.)
1180
*/
1181
int good_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1183
return 0;
1184
}
1185
1186
struct ifreq ifr;
1187
if(not get_flags(if_entry->d_name, &ifr)){
1188
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface "
1190
"\"%s\"\n", if_entry->d_name);
1191
}
1192
return 0;
1193
}
1194
1195
if(not good_flags(if_entry->d_name, &ifr)){
1196
return 0;
1197
}
1198
return 1;
1199
}
1200
1201
/*
1202
* This function determines if a directory entry in /sys/class/net
1203
* corresponds to an acceptable network device which is up.
1204
* (This function is passed to scandir(3) as a filter function.)
1205
*/
1206
int up_interface(const struct dirent *if_entry){
1207
if(if_entry->d_name[0] == '.'){
1208
return 0;
1209
}
1210
1211
struct ifreq ifr;
1212
if(not get_flags(if_entry->d_name, &ifr)){
1213
if(debug){
1214
fprintf_plus(stderr, "Failed to get flags for interface "
1215
"\"%s\"\n", if_entry->d_name);
1216
}
1217
return 0;
1218
}
1219
1220
/* Reject down interfaces */
1221
if(not (ifr.ifr_flags & IFF_UP)){
1222
if(debug){
1223
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
if_entry->d_name);
1225
}
1226
return 0;
1227
}
1228
1229
/* Reject non-running interfaces */
1230
if(not (ifr.ifr_flags & IFF_RUNNING)){
1231
if(debug){
1232
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if_entry->d_name);
1234
}
1235
return 0;
1236
}
1237
1238
if(not good_flags(if_entry->d_name, &ifr)){
1239
return 0;
1240
}
1241
return 1;
1242
}
1243
1244
int notdotentries(const struct dirent *direntry){
1245
/* Skip "." and ".." */
1246
if(direntry->d_name[0] == '.'
1247
and (direntry->d_name[1] == '\0'
1248
or (direntry->d_name[1] == '.'
1249
and direntry->d_name[2] == '\0'))){
1250
return 0;
1251
}
1252
return 1;
1253
}
1254
1255
/* Is this directory entry a runnable program? */
1256
int runnable_hook(const struct dirent *direntry){
1257
int ret;
1258
size_t sret;
1259
struct stat st;
1260
1261
if((direntry->d_name)[0] == '\0'){
1262
/* Empty name? */
1263
return 0;
1264
}
1265
1266
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1267
"abcdefghijklmnopqrstuvwxyz"
1268
"0123456789"
1269
"_-");
1270
if((direntry->d_name)[sret] != '\0'){
1271
/* Contains non-allowed characters */
1272
if(debug){
1273
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
direntry->d_name);
1275
}
1276
return 0;
1277
}
1278
1279
char *fullname = NULL;
1280
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1281
if(ret < 0){
1282
perror_plus("asprintf");
1283
return 0;
1284
}
1285
1286
ret = stat(fullname, &st);
1287
if(ret == -1){
1288
if(debug){
1289
perror_plus("Could not stat hook");
1290
}
1291
return 0;
1292
}
1293
if(not (S_ISREG(st.st_mode))){
1294
/* Not a regular file */
1295
if(debug){
1296
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1297
direntry->d_name);
1298
}
1299
return 0;
1300
}
1301
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1302
/* Not executable */
1303
if(debug){
1304
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
direntry->d_name);
1306
}
1307
return 0;
1308
}
1309
if(debug){
1310
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
direntry->d_name);
1312
}
1313
return 1;
1314
}
1315
1316
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1317
int ret;
1318
struct timespec now;
1319
struct timespec waited_time;
1320
intmax_t block_time;
1321
1322
while(true){
1323
if(mc.current_server == NULL){
1324
if (debug){
1325
fprintf_plus(stderr, "Wait until first server is found."
1326
" No timeout!\n");
1327
}
1328
ret = avahi_simple_poll_iterate(s, -1);
1329
} else {
1330
if (debug){
1331
fprintf_plus(stderr, "Check current_server if we should run"
1332
" it, or wait\n");
1333
}
1334
/* the current time */
1335
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1336
if(ret == -1){
1337
perror_plus("clock_gettime");
1338
return -1;
1339
}
1340
/* Calculating in ms how long time between now and server
1341
who we visted longest time ago. Now - last seen. */
1342
waited_time.tv_sec = (now.tv_sec
1343
- mc.current_server->last_seen.tv_sec);
1344
waited_time.tv_nsec = (now.tv_nsec
1345
- mc.current_server->last_seen.tv_nsec);
1346
/* total time is 10s/10,000ms.
1347
Converting to s from ms by dividing by 1,000,
1348
and ns to ms by dividing by 1,000,000. */
1349
block_time = ((retry_interval
1350
- ((intmax_t)waited_time.tv_sec * 1000))
1351
- ((intmax_t)waited_time.tv_nsec / 1000000));
1352
1353
if (debug){
1354
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1355
block_time);
1356
}
1357
1358
if(block_time <= 0){
1359
ret = start_mandos_communication(mc.current_server->ip,
1360
mc.current_server->port,
1361
mc.current_server->if_index,
1362
mc.current_server->af);
1363
if(ret == 0){
1364
avahi_simple_poll_quit(mc.simple_poll);
1365
return 0;
1366
}
1367
ret = clock_gettime(CLOCK_MONOTONIC,
1368
&mc.current_server->last_seen);
1369
if(ret == -1){
1370
perror_plus("clock_gettime");
1371
return -1;
1372
}
1373
mc.current_server = mc.current_server->next;
1374
block_time = 0; /* Call avahi to find new Mandos
1375
servers, but don't block */
1376
}
1377
1378
ret = avahi_simple_poll_iterate(s, (int)block_time);
1379
}
1380
if(ret != 0){
1381
if (ret > 0 or errno != EINTR){
1382
return (ret != 1) ? ret : 0;
1383
}
1384
}
1385
}
1386
}
1387
1388
bool run_network_hooks(const char *mode, const char *interface,
1389
const float delay){
1390
struct dirent **direntries;
1391
struct dirent *direntry;
1392
int ret;
1393
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1394
alphasort);
1395
if(numhooks == -1){
1396
perror_plus("scandir");
1397
} else {
1398
int devnull = open("/dev/null", O_RDONLY);
1399
for(int i = 0; i < numhooks; i++){
1400
direntry = direntries[i];
1401
char *fullname = NULL;
1402
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1403
if(ret < 0){
1404
perror_plus("asprintf");
1405
continue;
1406
}
1407
if(debug){
1408
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1409
direntry->d_name);
1410
}
1411
pid_t hook_pid = fork();
1412
if(hook_pid == 0){
1413
/* Child */
1414
/* Raise privileges */
1415
errno = 0;
1416
ret = seteuid(0);
1417
if(ret == -1){
1418
perror_plus("seteuid");
1419
}
1420
/* Raise privileges even more */
1421
errno = 0;
1422
ret = setuid(0);
1423
if(ret == -1){
1424
perror_plus("setuid");
1425
}
1426
/* Set group */
1427
errno = 0;
1428
ret = setgid(0);
1429
if(ret == -1){
1430
perror_plus("setgid");
1431
}
1432
/* Reset supplementary groups */
1433
errno = 0;
1434
ret = setgroups(0, NULL);
1435
if(ret == -1){
1436
perror_plus("setgroups");
1437
}
1438
dup2(devnull, STDIN_FILENO);
1439
close(devnull);
1440
dup2(STDERR_FILENO, STDOUT_FILENO);
1441
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1442
if(ret == -1){
1443
perror_plus("setenv");
1444
_exit(EX_OSERR);
1445
}
1446
ret = setenv("DEVICE", interface, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("MODE", mode, 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
char *delaystring;
1462
ret = asprintf(&delaystring, "%f", delay);
1463
if(ret == -1){
1464
perror_plus("asprintf");
1465
_exit(EX_OSERR);
1466
}
1467
ret = setenv("DELAY", delaystring, 1);
1468
if(ret == -1){
1469
free(delaystring);
1470
perror_plus("setenv");
1471
_exit(EX_OSERR);
1472
}
1473
free(delaystring);
1474
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1475
perror_plus("execl");
1476
_exit(EXIT_FAILURE);
1477
}
1478
} else {
1479
int status;
1480
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1481
perror_plus("waitpid");
1482
free(fullname);
1483
continue;
1484
}
1485
if(WIFEXITED(status)){
1486
if(WEXITSTATUS(status) != 0){
1487
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1488
" with status %d\n", direntry->d_name,
1489
WEXITSTATUS(status));
1490
free(fullname);
1491
continue;
1492
}
1493
} else if(WIFSIGNALED(status)){
1494
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1495
" signal %d\n", direntry->d_name,
1496
WTERMSIG(status));
1497
free(fullname);
1498
continue;
1499
} else {
1500
fprintf_plus(stderr, "Warning: network hook \"%s\""
1501
" crashed\n", direntry->d_name);
1502
free(fullname);
1503
continue;
1504
}
1505
}
1506
free(fullname);
1507
if(debug){
1508
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1509
direntry->d_name);
1510
}
1511
}
1512
close(devnull);
1513
}
1514
return true;
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1515
1120
}
1516
1121
1517
1122
int main(int argc, char *argv[]){
1536
1141
bool gnutls_initialized = false;
1537
1142
bool gpgme_initialized = false;
1538
1143
float delay = 2.5f;
1539
double retry_interval = 10; /* 10s between trying a server and
1540
retrying the same server again */
1541
1144
1542
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1543
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1549
1152
errno = 0;
1550
1153
ret = setgid(gid);
1551
1154
if(ret == -1){
1552
perror_plus("setgid");
1155
perror("setgid");
1553
1156
}
1554
1157
1555
1158
/* Lower user privileges (temporarily) */
1556
1159
errno = 0;
1557
1160
ret = seteuid(uid);
1558
1161
if(ret == -1){
1559
perror_plus("seteuid");
1162
perror("seteuid");
1560
1163
}
1561
1164
1562
1165
if(quit_now){
1597
1200
.arg = "SECONDS",
1598
1201
.doc = "Maximum delay to wait for interface startup",
1599
1202
.group = 2 },
1600
{ .name = "retry", .key = 132,
1601
.arg = "SECONDS",
1602
.doc = "Retry interval used when denied by the mandos server",
1603
.group = 2 },
1604
{ .name = "network-hook-dir", .key = 133,
1605
.arg = "DIR",
1606
.doc = "Directory where network hooks are located",
1607
.group = 2 },
1608
1203
/*
1609
1204
* These reproduce what we would get without ARGP_NO_HELP
1610
1205
*/
1654
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1655
1250
argp_error(state, "Bad delay");
1656
1251
}
1657
case 132: /* --retry */
1658
errno = 0;
1659
retry_interval = strtod(arg, &tmp);
1660
if(errno != 0 or tmp == arg or *tmp != '\0'
1661
or (retry_interval * 1000) > INT_MAX
1662
or retry_interval < 0){
1663
argp_error(state, "Bad retry interval");
1664
}
1665
break;
1666
case 133: /* --network-hook-dir */
1667
hookdir = arg;
1668
1252
break;
1669
1253
/*
1670
1254
* These reproduce what we would get without ARGP_NO_HELP
1677
1261
argp_state_help(state, state->out_stream,
1678
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1679
1263
case 'V': /* --version */
1680
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1681
1265
exit(argp_err_exit_status);
1682
1266
break;
1683
1267
default:
1698
1282
case ENOMEM:
1699
1283
default:
1700
1284
errno = ret;
1701
perror_plus("argp_parse");
1285
perror("argp_parse");
1702
1286
exitcode = EX_OSERR;
1703
1287
goto end;
1704
1288
case EINVAL:
1706
1290
goto end;
1707
1291
}
1708
1292
}
1709
1710
{
1711
/* Work around Debian bug #633582:
1712
<http://bugs.debian.org/633582> */
1713
1714
/* Re-raise priviliges */
1715
errno = 0;
1716
ret = seteuid(0);
1717
if(ret == -1){
1718
perror_plus("seteuid");
1719
} else {
1720
struct stat st;
1721
1722
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1723
int seckey_fd = open(seckey, O_RDONLY);
1724
if(seckey_fd == -1){
1725
perror_plus("open");
1726
} else {
1727
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1728
if(ret == -1){
1729
perror_plus("fstat");
1730
} else {
1731
if(S_ISREG(st.st_mode)
1732
and st.st_uid == 0 and st.st_gid == 0){
1733
ret = fchown(seckey_fd, uid, gid);
1734
if(ret == -1){
1735
perror_plus("fchown");
1736
}
1737
}
1738
}
1739
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
}
1741
}
1742
1743
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1744
int pubkey_fd = open(pubkey, O_RDONLY);
1745
if(pubkey_fd == -1){
1746
perror_plus("open");
1747
} else {
1748
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1749
if(ret == -1){
1750
perror_plus("fstat");
1751
} else {
1752
if(S_ISREG(st.st_mode)
1753
and st.st_uid == 0 and st.st_gid == 0){
1754
ret = fchown(pubkey_fd, uid, gid);
1755
if(ret == -1){
1756
perror_plus("fchown");
1757
}
1758
}
1759
}
1760
TEMP_FAILURE_RETRY(close(pubkey_fd));
1761
}
1762
}
1763
1764
/* Lower privileges */
1765
errno = 0;
1766
ret = seteuid(uid);
1767
if(ret == -1){
1768
perror_plus("seteuid");
1769
}
1770
}
1771
}
1772
1773
/* Run network hooks */
1774
if(not run_network_hooks("start", interface, delay)){
1775
goto end;
1776
}
1777
1293
1778
1294
if(not debug){
1779
1295
avahi_set_log_function(empty_log);
1780
1296
}
1781
1297
1782
1298
if(interface[0] == '\0'){
1783
1299
struct dirent **direntries;
1784
/* First look for interfaces that are up */
1785
ret = scandir(sys_class_net, &direntries, up_interface,
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1786
1301
alphasort);
1787
if(ret == 0){
1788
/* No up interfaces, look for any good interfaces */
1789
free(direntries);
1790
ret = scandir(sys_class_net, &direntries, good_interface,
1791
alphasort);
1792
}
1793
1302
if(ret >= 1){
1794
/* Pick the first interface returned */
1303
/* Pick the first good interface */
1795
1304
interface = strdup(direntries[0]->d_name);
1796
1305
if(debug){
1797
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1798
1307
}
1799
1308
if(interface == NULL){
1800
perror_plus("malloc");
1309
perror("malloc");
1801
1310
free(direntries);
1802
1311
exitcode = EXIT_FAILURE;
1803
1312
goto end;
1805
1314
free(direntries);
1806
1315
} else {
1807
1316
free(direntries);
1808
fprintf_plus(stderr, "Could not find a network interface\n");
1317
fprintf(stderr, "Could not find a network interface\n");
1809
1318
exitcode = EXIT_FAILURE;
1810
1319
goto end;
1811
1320
}
1817
1326
srand((unsigned int) time(NULL));
1818
1327
mc.simple_poll = avahi_simple_poll_new();
1819
1328
if(mc.simple_poll == NULL){
1820
fprintf_plus(stderr,
1821
"Avahi: Failed to create simple poll object.\n");
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1822
1330
exitcode = EX_UNAVAILABLE;
1823
1331
goto end;
1824
1332
}
1826
1334
sigemptyset(&sigterm_action.sa_mask);
1827
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1828
1336
if(ret == -1){
1829
perror_plus("sigaddset");
1337
perror("sigaddset");
1830
1338
exitcode = EX_OSERR;
1831
1339
goto end;
1832
1340
}
1833
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1834
1342
if(ret == -1){
1835
perror_plus("sigaddset");
1343
perror("sigaddset");
1836
1344
exitcode = EX_OSERR;
1837
1345
goto end;
1838
1346
}
1839
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1840
1348
if(ret == -1){
1841
perror_plus("sigaddset");
1349
perror("sigaddset");
1842
1350
exitcode = EX_OSERR;
1843
1351
goto end;
1844
1352
}
1848
1356
*/
1849
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1850
1358
if(ret == -1){
1851
perror_plus("sigaction");
1359
perror("sigaction");
1852
1360
return EX_OSERR;
1853
1361
}
1854
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1855
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1856
1364
if(ret == -1){
1857
perror_plus("sigaction");
1365
perror("sigaction");
1858
1366
exitcode = EX_OSERR;
1859
1367
goto end;
1860
1368
}
1861
1369
}
1862
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1863
1371
if(ret == -1){
1864
perror_plus("sigaction");
1372
perror("sigaction");
1865
1373
return EX_OSERR;
1866
1374
}
1867
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1868
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1869
1377
if(ret == -1){
1870
perror_plus("sigaction");
1378
perror("sigaction");
1871
1379
exitcode = EX_OSERR;
1872
1380
goto end;
1873
1381
}
1874
1382
}
1875
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1876
1384
if(ret == -1){
1877
perror_plus("sigaction");
1385
perror("sigaction");
1878
1386
return EX_OSERR;
1879
1387
}
1880
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1881
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1882
1390
if(ret == -1){
1883
perror_plus("sigaction");
1391
perror("sigaction");
1884
1392
exitcode = EX_OSERR;
1885
1393
goto end;
1886
1394
}
1890
1398
if(strcmp(interface, "none") != 0){
1891
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1892
1400
if(if_index == 0){
1893
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1894
1402
exitcode = EX_UNAVAILABLE;
1895
1403
goto end;
1896
1404
}
1903
1411
errno = 0;
1904
1412
ret = seteuid(0);
1905
1413
if(ret == -1){
1906
perror_plus("seteuid");
1414
perror("seteuid");
1907
1415
}
1908
1416
1909
1417
#ifdef __linux__
1913
1421
bool restore_loglevel = true;
1914
1422
if(ret == -1){
1915
1423
restore_loglevel = false;
1916
perror_plus("klogctl");
1424
perror("klogctl");
1917
1425
}
1918
1426
#endif /* __linux__ */
1919
1427
1920
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1921
1429
if(sd < 0){
1922
perror_plus("socket");
1430
perror("socket");
1923
1431
exitcode = EX_OSERR;
1924
1432
#ifdef __linux__
1925
1433
if(restore_loglevel){
1926
1434
ret = klogctl(7, NULL, 0);
1927
1435
if(ret == -1){
1928
perror_plus("klogctl");
1436
perror("klogctl");
1929
1437
}
1930
1438
}
1931
1439
#endif /* __linux__ */
1933
1441
errno = 0;
1934
1442
ret = seteuid(uid);
1935
1443
if(ret == -1){
1936
perror_plus("seteuid");
1444
perror("seteuid");
1937
1445
}
1938
1446
goto end;
1939
1447
}
1940
1448
strcpy(network.ifr_name, interface);
1941
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1942
1450
if(ret == -1){
1943
perror_plus("ioctl SIOCGIFFLAGS");
1451
perror("ioctl SIOCGIFFLAGS");
1944
1452
#ifdef __linux__
1945
1453
if(restore_loglevel){
1946
1454
ret = klogctl(7, NULL, 0);
1947
1455
if(ret == -1){
1948
perror_plus("klogctl");
1456
perror("klogctl");
1949
1457
}
1950
1458
}
1951
1459
#endif /* __linux__ */
1954
1462
errno = 0;
1955
1463
ret = seteuid(uid);
1956
1464
if(ret == -1){
1957
perror_plus("seteuid");
1465
perror("seteuid");
1958
1466
}
1959
1467
goto end;
1960
1468
}
1964
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1965
1473
if(ret == -1){
1966
1474
take_down_interface = false;
1967
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1968
1476
exitcode = EX_OSERR;
1969
1477
#ifdef __linux__
1970
1478
if(restore_loglevel){
1971
1479
ret = klogctl(7, NULL, 0);
1972
1480
if(ret == -1){
1973
perror_plus("klogctl");
1481
perror("klogctl");
1974
1482
}
1975
1483
}
1976
1484
#endif /* __linux__ */
1978
1486
errno = 0;
1979
1487
ret = seteuid(uid);
1980
1488
if(ret == -1){
1981
perror_plus("seteuid");
1489
perror("seteuid");
1982
1490
}
1983
1491
goto end;
1984
1492
}
1985
1493
}
1986
/* Sleep checking until interface is running.
1987
Check every 0.25s, up to total time of delay */
1494
/* sleep checking until interface is running */
1988
1495
for(int i=0; i < delay * 4; i++){
1989
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1990
1497
if(ret == -1){
1991
perror_plus("ioctl SIOCGIFFLAGS");
1498
perror("ioctl SIOCGIFFLAGS");
1992
1499
} else if(network.ifr_flags & IFF_RUNNING){
1993
1500
break;
1994
1501
}
1995
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1996
1503
ret = nanosleep(&sleeptime, NULL);
1997
1504
if(ret == -1 and errno != EINTR){
1998
perror_plus("nanosleep");
1505
perror("nanosleep");
1999
1506
}
2000
1507
}
2001
1508
if(not take_down_interface){
2002
1509
/* We won't need the socket anymore */
2003
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2004
1511
if(ret == -1){
2005
perror_plus("close");
1512
perror("close");
2006
1513
}
2007
1514
}
2008
1515
#ifdef __linux__
2010
1517
/* Restores kernel loglevel to default */
2011
1518
ret = klogctl(7, NULL, 0);
2012
1519
if(ret == -1){
2013
perror_plus("klogctl");
1520
perror("klogctl");
2014
1521
}
2015
1522
}
2016
1523
#endif /* __linux__ */
2017
1524
/* Lower privileges */
2018
1525
errno = 0;
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
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
}
2023
1538
}
2024
1539
}
2025
1540
2029
1544
2030
1545
ret = init_gnutls_global(pubkey, seckey);
2031
1546
if(ret == -1){
2032
fprintf_plus(stderr, "init_gnutls_global failed\n");
1547
fprintf(stderr, "init_gnutls_global failed\n");
2033
1548
exitcode = EX_UNAVAILABLE;
2034
1549
goto end;
2035
1550
} else {
2040
1555
goto end;
2041
1556
}
2042
1557
1558
tempdir_created = true;
2043
1559
if(mkdtemp(tempdir) == NULL){
2044
perror_plus("mkdtemp");
1560
tempdir_created = false;
1561
perror("mkdtemp");
2045
1562
goto end;
2046
1563
}
2047
tempdir_created = true;
2048
1564
2049
1565
if(quit_now){
2050
1566
goto end;
2051
1567
}
2052
1568
2053
1569
if(not init_gpgme(pubkey, seckey, tempdir)){
2054
fprintf_plus(stderr, "init_gpgme failed\n");
1570
fprintf(stderr, "init_gpgme failed\n");
2055
1571
exitcode = EX_UNAVAILABLE;
2056
1572
goto end;
2057
1573
} else {
2067
1583
/* (Mainly meant for debugging) */
2068
1584
char *address = strrchr(connect_to, ':');
2069
1585
if(address == NULL){
2070
fprintf_plus(stderr, "No colon in address\n");
1586
fprintf(stderr, "No colon in address\n");
2071
1587
exitcode = EX_USAGE;
2072
1588
goto end;
2073
1589
}
2081
1597
tmpmax = strtoimax(address+1, &tmp, 10);
2082
1598
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2083
1599
or tmpmax != (uint16_t)tmpmax){
2084
fprintf_plus(stderr, "Bad port number\n");
1600
fprintf(stderr, "Bad port number\n");
2085
1601
exitcode = EX_USAGE;
2086
1602
goto end;
2087
1603
}
2092
1608
2093
1609
port = (uint16_t)tmpmax;
2094
1610
*address = '\0';
1611
address = connect_to;
2095
1612
/* Colon in address indicates IPv6 */
2096
1613
int af;
2097
if(strchr(connect_to, ':') != NULL){
1614
if(strchr(address, ':') != NULL){
2098
1615
af = AF_INET6;
2099
/* Accept [] around IPv6 address - see RFC 5952 */
2100
if(connect_to[0] == '[' and address[-1] == ']')
2101
{
2102
connect_to++;
2103
address[-1] = '\0';
2104
}
2105
1616
} else {
2106
1617
af = AF_INET;
2107
1618
}
2108
address = connect_to;
2109
1619
2110
1620
if(quit_now){
2111
1621
goto end;
2112
1622
}
2113
1623
2114
1624
while(not quit_now){
2115
1625
ret = start_mandos_communication(address, port, if_index, af);
2116
1626
if(quit_now or ret == 0){
2117
1627
break;
2118
1628
}
2119
if(debug){
2120
fprintf_plus(stderr, "Retrying in %d seconds\n",
2121
(int)retry_interval);
2122
}
2123
sleep((int)retry_interval);
2124
}
2125
1629
sleep(15);
1630
};
1631
2126
1632
if (not quit_now){
2127
1633
exitcode = EXIT_SUCCESS;
2128
1634
}
2129
1635
2130
1636
goto end;
2131
1637
}
2132
1638
2154
1660
2155
1661
/* Check if creating the Avahi server object succeeded */
2156
1662
if(mc.server == NULL){
2157
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2158
avahi_strerror(error));
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
1664
avahi_strerror(error));
2159
1665
exitcode = EX_UNAVAILABLE;
2160
1666
goto end;
2161
1667
}
2169
1675
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2170
1676
NULL, 0, browse_callback, NULL);
2171
1677
if(sb == NULL){
2172
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
1678
fprintf(stderr, "Failed to create service browser: %s\n",
1679
avahi_strerror(avahi_server_errno(mc.server)));
2174
1680
exitcode = EX_UNAVAILABLE;
2175
1681
goto end;
2176
1682
}
2182
1688
/* Run the main loop */
2183
1689
2184
1690
if(debug){
2185
fprintf_plus(stderr, "Starting Avahi loop search\n");
2186
}
2187
2188
ret = avahi_loop_with_timeout(mc.simple_poll,
2189
(int)(retry_interval * 1000));
2190
if(debug){
2191
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2192
(ret == 0) ? "successfully" : "with error");
2193
}
1691
fprintf(stderr, "Starting Avahi loop search\n");
1692
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2194
1695
2195
1696
end:
2196
1697
2197
1698
if(debug){
2198
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1699
fprintf(stderr, "%s exiting\n", argv[0]);
2199
1700
}
2200
1701
2201
1702
/* Cleanup things */
2218
1719
gpgme_release(mc.ctx);
2219
1720
}
2220
1721
2221
/* Cleans up the circular linked list of Mandos servers the client
2222
has seen */
2223
if(mc.current_server != NULL){
2224
mc.current_server->prev->next = NULL;
2225
while(mc.current_server != NULL){
2226
server *next = mc.current_server->next;
2227
free(mc.current_server);
2228
mc.current_server = next;
2229
}
2230
}
2231
2232
/* Run network hooks */
2233
run_network_hooks("stop", interface, delay);
2234
2235
/* Re-raise priviliges */
2236
{
1722
/* Take down the network interface */
1723
if(take_down_interface){
1724
/* Re-raise priviliges */
2237
1725
errno = 0;
2238
1726
ret = seteuid(0);
2239
1727
if(ret == -1){
2240
perror_plus("seteuid");
1728
perror("seteuid");
2241
1729
}
2242
2243
/* Take down the network interface */
2244
if(take_down_interface and geteuid() == 0){
1730
if(geteuid() == 0){
2245
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2246
1732
if(ret == -1){
2247
perror_plus("ioctl SIOCGIFFLAGS");
2248
} else if(network.ifr_flags & IFF_UP){
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
2249
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2250
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2251
1737
if(ret == -1){
2252
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2253
1739
}
2254
1740
}
2255
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2256
1742
if(ret == -1){
2257
perror_plus("close");
1743
perror("close");
1744
}
1745
/* Lower privileges permanently */
1746
errno = 0;
1747
ret = setuid(uid);
1748
if(ret == -1){
1749
perror("setuid");
2258
1750
}
2259
1751
}
2260
1752
}
2261
/* Lower privileges permanently */
2262
errno = 0;
2263
ret = setuid(uid);
2264
if(ret == -1){
2265
perror_plus("setuid");
2266
}
2267
1753
2268
/* Removes the GPGME temp directory and all files inside */
1754
/* Removes the temp directory used by GPGME */
2269
1755
if(tempdir_created){
2270
struct dirent **direntries = NULL;
2271
struct dirent *direntry = NULL;
2272
int numentries = scandir(tempdir, &direntries, notdotentries,
2273
alphasort);
2274
if (numentries > 0){
2275
for(int i = 0; i < numentries; i++){
2276
direntry = direntries[i];
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
}
2277
1776
char *fullname = NULL;
2278
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
2279
1778
direntry->d_name);
2280
1779
if(ret < 0){
2281
perror_plus("asprintf");
1780
perror("asprintf");
2282
1781
continue;
2283
1782
}
2284
1783
ret = remove(fullname);
2285
1784
if(ret == -1){
2286
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2287
strerror(errno));
1785
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1786
strerror(errno));
2288
1787
}
2289
1788
free(fullname);
2290
1789
}
2291
}
2292
2293
/* need to clean even if 0 because man page doesn't specify */
2294
free(direntries);
2295
if (numentries == -1){
2296
perror_plus("scandir");
1790
closedir(d);
2297
1791
}
2298
1792
ret = rmdir(tempdir);
2299
1793
if(ret == -1 and errno != ENOENT){
2300
perror_plus("rmdir");
1794
perror("rmdir");
2301
1795
}
2302
1796
}
2303
1797
2308
1802
&old_sigterm_action,
2309
1803
NULL));
2310
1804
if(ret == -1){
2311
perror_plus("sigaction");
1805
perror("sigaction");
2312
1806
}
2313
1807
do {
2314
1808
ret = raise(signal_received);
2315
1809
} while(ret != 0 and errno == EINTR);
2316
1810
if(ret != 0){
2317
perror_plus("raise");
1811
perror("raise");
2318
1812
abort();
2319
1813
}
2320
1814
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0