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237.2.160
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2009-10-30 16:23:43 UTC
- mto: (24.1.146 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20091030162343-1p2a8bf3gc084kc9
* plugins.d/password-prompt.c: Use environment variables and prompt
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
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,
83
82
#include <signal.h> /* sigemptyset(), sigaddset(),
84
83
sigaction(), SIGTERM, sig_atomic_t,
85
84
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
90
86
91
87
#ifdef __linux__
92
88
#include <sys/klog.h> /* klogctl() */
110
106
init_gnutls_session(),
111
107
GNUTLS_* */
112
108
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
109
/* gnutls_certificate_set_openpgp_key_file(),
110
GNUTLS_OPENPGP_FMT_BASE64 */
115
111
116
112
/* GPGME */
117
113
#include <gpgme.h> /* All GPGME types, constants and
125
121
#define PATHDIR "/conf/conf.d/mandos"
126
122
#define SECKEY "seckey.txt"
127
123
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
124
130
125
bool debug = false;
131
126
static const char mandos_protocol_version[] = "1";
132
127
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
134
static const char sys_class_net[] = "/sys/class/net";
135
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
138
/* Doubly linked list that need to be circularly linked when used */
139
typedef struct server{
140
const char *ip;
141
uint16_t port;
142
AvahiIfIndex if_index;
143
int af;
144
struct timespec last_seen;
145
struct server *next;
146
struct server *prev;
147
} server;
128
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
148
129
149
130
/* Used for passing in values through the Avahi callback functions */
150
131
typedef struct {
155
136
gnutls_dh_params_t dh_params;
156
137
const char *priority;
157
138
gpgme_ctx_t ctx;
158
server *current_server;
159
139
} mandos_context;
160
140
161
141
/* global context so signal handler can reach it*/
162
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
143
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
166
145
167
146
sig_atomic_t quit_now = 0;
168
147
int signal_received = 0;
169
148
170
/* Function to use when printing errors */
171
void perror_plus(const char *print_text){
172
fprintf(stderr, "Mandos plugin %s: ",
173
program_invocation_short_name);
174
perror(print_text);
175
}
176
177
int fprintf_plus(FILE *stream, const char *format, ...){
178
va_list ap;
179
va_start (ap, format);
180
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
184
}
185
186
149
/*
187
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
188
151
* bytes. "buffer_capacity" is how much is currently allocated,
189
152
* "buffer_length" is how much is already used.
190
153
*/
191
154
size_t incbuffer(char **buffer, size_t buffer_length,
192
size_t buffer_capacity){
155
size_t buffer_capacity){
193
156
if(buffer_length + BUFFER_SIZE > buffer_capacity){
194
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
195
158
if(buffer == NULL){
200
163
return buffer_capacity;
201
164
}
202
165
203
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
206
int ret;
207
server *new_server = malloc(sizeof(server));
208
if(new_server == NULL){
209
perror_plus("malloc");
210
return -1;
211
}
212
*new_server = (server){ .ip = strdup(ip),
213
.port = port,
214
.if_index = if_index,
215
.af = af };
216
if(new_server->ip == NULL){
217
perror_plus("strdup");
218
return -1;
219
}
220
/* Special case of first server */
221
if (mc.current_server == NULL){
222
new_server->next = new_server;
223
new_server->prev = new_server;
224
mc.current_server = new_server;
225
/* Place the new server last in the list */
226
} else {
227
new_server->next = mc.current_server;
228
new_server->prev = mc.current_server->prev;
229
new_server->prev->next = new_server;
230
mc.current_server->prev = new_server;
231
}
232
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
233
if(ret == -1){
234
perror_plus("clock_gettime");
235
return -1;
236
}
237
return 0;
238
}
239
240
166
/*
241
167
* Initialize GPGME.
242
168
*/
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
169
static bool init_gpgme(const char *seckey,
170
const char *pubkey, const char *tempdir){
245
171
gpgme_error_t rc;
246
172
gpgme_engine_info_t engine_info;
247
173
256
182
257
183
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
258
184
if(fd == -1){
259
perror_plus("open");
185
perror("open");
260
186
return false;
261
187
}
262
188
263
189
rc = gpgme_data_new_from_fd(&pgp_data, fd);
264
190
if(rc != GPG_ERR_NO_ERROR){
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
191
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
192
gpgme_strsource(rc), gpgme_strerror(rc));
267
193
return false;
268
194
}
269
195
270
196
rc = gpgme_op_import(mc.ctx, pgp_data);
271
197
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
274
200
return false;
275
201
}
276
202
277
203
ret = (int)TEMP_FAILURE_RETRY(close(fd));
278
204
if(ret == -1){
279
perror_plus("close");
205
perror("close");
280
206
}
281
207
gpgme_data_release(pgp_data);
282
208
return true;
283
209
}
284
210
285
211
if(debug){
286
fprintf_plus(stderr, "Initializing GPGME\n");
212
fprintf(stderr, "Initializing GPGME\n");
287
213
}
288
214
289
215
/* Init GPGME */
290
216
gpgme_check_version(NULL);
291
217
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
292
218
if(rc != GPG_ERR_NO_ERROR){
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
219
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
220
gpgme_strsource(rc), gpgme_strerror(rc));
295
221
return false;
296
222
}
297
223
298
/* Set GPGME home directory for the OpenPGP engine only */
224
/* Set GPGME home directory for the OpenPGP engine only */
299
225
rc = gpgme_get_engine_info(&engine_info);
300
226
if(rc != GPG_ERR_NO_ERROR){
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
227
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
228
gpgme_strsource(rc), gpgme_strerror(rc));
303
229
return false;
304
230
}
305
231
while(engine_info != NULL){
311
237
engine_info = engine_info->next;
312
238
}
313
239
if(engine_info == NULL){
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
240
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
241
return false;
317
242
}
318
243
319
244
/* Create new GPGME "context" */
320
245
rc = gpgme_new(&(mc.ctx));
321
246
if(rc != GPG_ERR_NO_ERROR){
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
gpgme_strsource(rc), gpgme_strerror(rc));
325
249
return false;
326
250
}
327
251
346
270
ssize_t plaintext_length = 0;
347
271
348
272
if(debug){
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
273
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
274
}
351
275
352
276
/* Create new GPGME data buffer from memory cryptotext */
353
277
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
354
278
0);
355
279
if(rc != GPG_ERR_NO_ERROR){
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
280
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
358
282
return -1;
359
283
}
360
284
361
285
/* Create new empty GPGME data buffer for the plaintext */
362
286
rc = gpgme_data_new(&dh_plain);
363
287
if(rc != GPG_ERR_NO_ERROR){
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
367
290
gpgme_data_release(dh_crypto);
368
291
return -1;
369
292
}
372
295
data buffer */
373
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
374
297
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
298
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
377
300
plaintext_length = -1;
378
301
if(debug){
379
302
gpgme_decrypt_result_t result;
380
303
result = gpgme_op_decrypt_result(mc.ctx);
381
304
if(result == NULL){
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
306
} else {
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
307
fprintf(stderr, "Unsupported algorithm: %s\n",
308
result->unsupported_algorithm);
309
fprintf(stderr, "Wrong key usage: %u\n",
310
result->wrong_key_usage);
388
311
if(result->file_name != NULL){
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
312
fprintf(stderr, "File name: %s\n", result->file_name);
390
313
}
391
314
gpgme_recipient_t recipient;
392
315
recipient = result->recipients;
393
316
while(recipient != NULL){
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
400
? "No" : "Yes");
317
fprintf(stderr, "Public key algorithm: %s\n",
318
gpgme_pubkey_algo_name(recipient->pubkey_algo));
319
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
320
fprintf(stderr, "Secret key available: %s\n",
321
recipient->status == GPG_ERR_NO_SECKEY
322
? "No" : "Yes");
401
323
recipient = recipient->next;
402
324
}
403
325
}
406
328
}
407
329
408
330
if(debug){
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
331
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
332
}
411
333
412
334
/* Seek back to the beginning of the GPGME plaintext data buffer */
413
335
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
414
perror_plus("gpgme_data_seek");
336
perror("gpgme_data_seek");
415
337
plaintext_length = -1;
416
338
goto decrypt_end;
417
339
}
419
341
*plaintext = NULL;
420
342
while(true){
421
343
plaintext_capacity = incbuffer(plaintext,
422
(size_t)plaintext_length,
423
plaintext_capacity);
344
(size_t)plaintext_length,
345
plaintext_capacity);
424
346
if(plaintext_capacity == 0){
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
347
perror("incbuffer");
348
plaintext_length = -1;
349
goto decrypt_end;
428
350
}
429
351
430
352
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
435
357
break;
436
358
}
437
359
if(ret < 0){
438
perror_plus("gpgme_data_read");
360
perror("gpgme_data_read");
439
361
plaintext_length = -1;
440
362
goto decrypt_end;
441
363
}
443
365
}
444
366
445
367
if(debug){
446
fprintf_plus(stderr, "Decrypted password is: ");
368
fprintf(stderr, "Decrypted password is: ");
447
369
for(ssize_t i = 0; i < plaintext_length; i++){
448
370
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
449
371
}
471
393
/* GnuTLS log function callback */
472
394
static void debuggnutls(__attribute__((unused)) int level,
473
395
const char* string){
474
fprintf_plus(stderr, "GnuTLS: %s", string);
396
fprintf(stderr, "GnuTLS: %s", string);
475
397
}
476
398
477
399
static int init_gnutls_global(const char *pubkeyfilename,
479
401
int ret;
480
402
481
403
if(debug){
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
404
fprintf(stderr, "Initializing GnuTLS\n");
483
405
}
484
406
485
407
ret = gnutls_global_init();
486
408
if(ret != GNUTLS_E_SUCCESS){
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
409
fprintf(stderr, "GnuTLS global_init: %s\n",
410
safer_gnutls_strerror(ret));
489
411
return -1;
490
412
}
491
413
498
420
}
499
421
500
422
/* OpenPGP credentials */
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
423
gnutls_certificate_allocate_credentials(&mc.cred);
502
424
if(ret != GNUTLS_E_SUCCESS){
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
429
safer_gnutls_strerror(ret));
505
430
gnutls_global_deinit();
506
431
return -1;
507
432
}
508
433
509
434
if(debug){
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
435
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
436
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
437
seckeyfilename);
514
438
}
515
439
516
440
ret = gnutls_certificate_set_openpgp_key_file
517
441
(mc.cred, pubkeyfilename, seckeyfilename,
518
442
GNUTLS_OPENPGP_FMT_BASE64);
519
443
if(ret != GNUTLS_E_SUCCESS){
520
fprintf_plus(stderr,
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
444
fprintf(stderr,
445
"Error[%d] while reading the OpenPGP key pair ('%s',"
446
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
447
fprintf(stderr, "The GnuTLS error is: %s\n",
448
safer_gnutls_strerror(ret));
525
449
goto globalfail;
526
450
}
527
451
528
452
/* GnuTLS server initialization */
529
453
ret = gnutls_dh_params_init(&mc.dh_params);
530
454
if(ret != GNUTLS_E_SUCCESS){
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
" %s\n", safer_gnutls_strerror(ret));
534
457
goto globalfail;
535
458
}
536
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
537
460
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
safer_gnutls_strerror(ret));
540
463
goto globalfail;
541
464
}
542
465
562
485
}
563
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
564
487
if(ret != GNUTLS_E_SUCCESS){
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
safer_gnutls_strerror(ret));
568
490
}
569
491
570
492
{
577
499
}
578
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
579
501
if(ret != GNUTLS_E_SUCCESS){
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
502
fprintf(stderr, "Syntax error at: %s\n", err);
503
fprintf(stderr, "GnuTLS error: %s\n",
504
safer_gnutls_strerror(ret));
583
505
gnutls_deinit(*session);
584
506
return -1;
585
507
}
594
516
}
595
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
596
518
if(ret != GNUTLS_E_SUCCESS){
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
520
safer_gnutls_strerror(ret));
599
521
gnutls_deinit(*session);
600
522
return -1;
601
523
}
631
553
gnutls_session_t session;
632
554
int pf; /* Protocol family */
633
555
634
errno = 0;
635
636
556
if(quit_now){
637
errno = EINTR;
638
557
return -1;
639
558
}
640
559
646
565
pf = PF_INET;
647
566
break;
648
567
default:
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
650
errno = EINVAL;
568
fprintf(stderr, "Bad address family: %d\n", af);
651
569
return -1;
652
570
}
653
571
657
575
}
658
576
659
577
if(debug){
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
579
"\n", ip, port);
662
580
}
663
581
664
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
665
583
if(tcp_sd < 0){
666
int e = errno;
667
perror_plus("socket");
668
errno = e;
584
perror("socket");
669
585
goto mandos_end;
670
586
}
671
587
672
588
if(quit_now){
673
errno = EINTR;
674
589
goto mandos_end;
675
590
}
676
591
683
598
ret = inet_pton(af, ip, &to.in.sin_addr);
684
599
}
685
600
if(ret < 0 ){
686
int e = errno;
687
perror_plus("inet_pton");
688
errno = e;
601
perror("inet_pton");
689
602
goto mandos_end;
690
603
}
691
604
if(ret == 0){
692
int e = errno;
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
694
errno = e;
605
fprintf(stderr, "Bad address: %s\n", ip);
695
606
goto mandos_end;
696
607
}
697
608
if(af == AF_INET6){
701
612
702
613
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
703
614
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
704
-Wunreachable-code*/
615
-Wunreachable-code*/
705
616
if(if_index == AVAHI_IF_UNSPEC){
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
708
errno = EINVAL;
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
709
619
goto mandos_end;
710
620
}
711
621
/* Set the network interface number as scope */
718
628
}
719
629
720
630
if(quit_now){
721
errno = EINTR;
722
631
goto mandos_end;
723
632
}
724
633
726
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
727
636
char interface[IF_NAMESIZE];
728
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
perror_plus("if_indextoname");
638
perror("if_indextoname");
730
639
} else {
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
733
642
}
734
643
} else {
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
737
646
}
738
647
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
648
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
746
655
sizeof(addrstr));
747
656
}
748
657
if(pcret == NULL){
749
perror_plus("inet_ntop");
658
perror("inet_ntop");
750
659
} else {
751
660
if(strcmp(addrstr, ip) != 0){
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
661
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
662
}
754
663
}
755
664
}
756
665
757
666
if(quit_now){
758
errno = EINTR;
759
667
goto mandos_end;
760
668
}
761
669
765
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
766
674
}
767
675
if(ret < 0){
768
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
769
int e = errno;
770
perror_plus("connect");
771
errno = e;
772
}
676
perror("connect");
773
677
goto mandos_end;
774
678
}
775
679
776
680
if(quit_now){
777
errno = EINTR;
778
681
goto mandos_end;
779
682
}
780
683
783
686
while(true){
784
687
size_t out_size = strlen(out);
785
688
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
786
out_size - written));
689
out_size - written));
787
690
if(ret == -1){
788
int e = errno;
789
perror_plus("write");
790
errno = e;
691
perror("write");
791
692
goto mandos_end;
792
693
}
793
694
written += (size_t)ret;
803
704
}
804
705
805
706
if(quit_now){
806
errno = EINTR;
807
707
goto mandos_end;
808
708
}
809
709
}
810
710
811
711
if(debug){
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
713
}
814
714
815
715
if(quit_now){
816
errno = EINTR;
817
716
goto mandos_end;
818
717
}
819
718
820
/* Spurious warning from -Wint-to-pointer-cast */
821
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
822
720
823
721
if(quit_now){
824
errno = EINTR;
825
722
goto mandos_end;
826
723
}
827
724
828
725
do {
829
726
ret = gnutls_handshake(session);
830
727
if(quit_now){
831
errno = EINTR;
832
728
goto mandos_end;
833
729
}
834
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
835
731
836
732
if(ret != GNUTLS_E_SUCCESS){
837
733
if(debug){
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
735
gnutls_perror(ret);
840
736
}
841
errno = EPROTO;
842
737
goto mandos_end;
843
738
}
844
739
845
740
/* Read OpenPGP packet that contains the wanted password */
846
741
847
742
if(debug){
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
744
ip);
850
745
}
851
746
852
747
while(true){
853
748
854
749
if(quit_now){
855
errno = EINTR;
856
750
goto mandos_end;
857
751
}
858
752
859
753
buffer_capacity = incbuffer(&buffer, buffer_length,
860
buffer_capacity);
754
buffer_capacity);
861
755
if(buffer_capacity == 0){
862
int e = errno;
863
perror_plus("incbuffer");
864
errno = e;
756
perror("incbuffer");
865
757
goto mandos_end;
866
758
}
867
759
868
760
if(quit_now){
869
errno = EINTR;
870
761
goto mandos_end;
871
762
}
872
763
885
776
ret = gnutls_handshake(session);
886
777
887
778
if(quit_now){
888
errno = EINTR;
889
779
goto mandos_end;
890
780
}
891
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
892
782
if(ret < 0){
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
784
gnutls_perror(ret);
896
errno = EPROTO;
897
785
goto mandos_end;
898
786
}
899
787
break;
900
788
default:
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
789
fprintf(stderr, "Unknown error while reading data from"
790
" encrypted session with Mandos server\n");
903
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
904
errno = EIO;
905
792
goto mandos_end;
906
793
}
907
794
} else {
910
797
}
911
798
912
799
if(debug){
913
fprintf_plus(stderr, "Closing TLS session\n");
800
fprintf(stderr, "Closing TLS session\n");
914
801
}
915
802
916
803
if(quit_now){
917
errno = EINTR;
918
804
goto mandos_end;
919
805
}
920
806
921
807
do {
922
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
923
809
if(quit_now){
924
errno = EINTR;
925
810
goto mandos_end;
926
811
}
927
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
928
813
929
814
if(buffer_length > 0){
930
815
ssize_t decrypted_buffer_size;
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
817
buffer_length,
932
818
&decrypted_buffer);
933
819
if(decrypted_buffer_size >= 0){
934
820
935
821
written = 0;
936
822
while(written < (size_t) decrypted_buffer_size){
937
823
if(quit_now){
938
errno = EINTR;
939
824
goto mandos_end;
940
825
}
941
826
943
828
(size_t)decrypted_buffer_size - written,
944
829
stdout);
945
830
if(ret == 0 and ferror(stdout)){
946
int e = errno;
947
831
if(debug){
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
832
fprintf(stderr, "Error writing encrypted data: %s\n",
833
strerror(errno));
950
834
}
951
errno = e;
952
835
goto mandos_end;
953
836
}
954
837
written += (size_t)ret;
960
843
/* Shutdown procedure */
961
844
962
845
mandos_end:
963
{
964
int e = errno;
965
free(decrypted_buffer);
966
free(buffer);
967
if(tcp_sd >= 0){
968
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
969
}
970
if(ret == -1){
971
if(e == 0){
972
e = errno;
973
}
974
perror_plus("close");
975
}
976
gnutls_deinit(session);
977
errno = e;
978
if(quit_now){
979
errno = EINTR;
980
retval = -1;
981
}
846
free(decrypted_buffer);
847
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
851
if(ret == -1){
852
perror("close");
853
}
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
982
857
}
983
858
return retval;
984
859
}
1009
884
switch(event){
1010
885
default:
1011
886
case AVAHI_RESOLVER_FAILURE:
1012
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1013
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1014
domain,
1015
avahi_strerror(avahi_server_errno(mc.server)));
887
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
888
" of type '%s' in domain '%s': %s\n", name, type, domain,
889
avahi_strerror(avahi_server_errno(mc.server)));
1016
890
break;
1017
891
1018
892
case AVAHI_RESOLVER_FOUND:
1020
894
char ip[AVAHI_ADDRESS_STR_MAX];
1021
895
avahi_address_snprint(ip, sizeof(ip), address);
1022
896
if(debug){
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
897
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
898
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
899
ip, (intmax_t)interface, port);
1026
900
}
1027
901
int ret = start_mandos_communication(ip, port, interface,
1028
902
avahi_proto_to_af(proto));
1029
903
if(ret == 0){
1030
904
avahi_simple_poll_quit(mc.simple_poll);
1031
} else {
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
1034
905
}
1035
906
}
1036
907
}
1060
931
default:
1061
932
case AVAHI_BROWSER_FAILURE:
1062
933
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
934
fprintf(stderr, "(Avahi browser) %s\n",
935
avahi_strerror(avahi_server_errno(mc.server)));
1065
936
avahi_simple_poll_quit(mc.simple_poll);
1066
937
return;
1067
938
1074
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1075
946
name, type, domain, protocol, 0,
1076
947
resolve_callback, NULL) == NULL)
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
name, avahi_strerror(avahi_server_errno(mc.server)));
1080
950
break;
1081
951
1082
952
case AVAHI_BROWSER_REMOVE:
1085
955
case AVAHI_BROWSER_ALL_FOR_NOW:
1086
956
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1087
957
if(debug){
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
958
fprintf(stderr, "No Mandos server found, still searching...\n");
1090
959
}
1091
960
break;
1092
961
}
1093
962
}
1094
963
1095
/* Signal handler that stops main loop after SIGTERM */
964
/* stop main loop after sigterm has been called */
1096
965
static void handle_sigterm(int sig){
1097
966
if(quit_now){
1098
967
return;
1100
969
quit_now = 1;
1101
970
signal_received = sig;
1102
971
int old_errno = errno;
1103
/* set main loop to exit */
1104
972
if(mc.simple_poll != NULL){
1105
973
avahi_simple_poll_quit(mc.simple_poll);
1106
974
}
1107
975
errno = old_errno;
1108
976
}
1109
977
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){
1121
if(debug){
1122
perror_plus("ioctl SIOCGIFFLAGS");
1123
}
1124
return false;
1125
}
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1131
/* Reject the loopback device */
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1133
if(debug){
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1136
}
1137
return false;
1138
}
1139
/* Accept point-to-point devices only if connect_to is specified */
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1141
if(debug){
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1144
}
1145
return true;
1146
}
1147
/* Otherwise, reject non-broadcast-capable devices */
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1149
if(debug){
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1152
}
1153
return false;
1154
}
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1156
if(ifr->ifr_flags & IFF_NOARP){
1157
if(debug){
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1160
}
1161
return false;
1162
}
1163
1164
/* Accept this device */
1165
if(debug){
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1167
}
1168
return true;
1169
}
1170
1171
/*
1172
* This function determines if a directory entry in /sys/class/net
1173
* corresponds to an acceptable network device.
1174
* (This function is passed to scandir(3) as a filter function.)
1175
*/
1176
int good_interface(const struct dirent *if_entry){
1177
if(if_entry->d_name[0] == '.'){
1178
return 0;
1179
}
1180
1181
struct ifreq ifr;
1182
if(not get_flags(if_entry->d_name, &ifr)){
1183
if(debug){
1184
fprintf_plus(stderr, "Failed to get flags for interface "
1185
"\"%s\"\n", if_entry->d_name);
1186
}
1187
return 0;
1188
}
1189
1190
if(not good_flags(if_entry->d_name, &ifr)){
1191
return 0;
1192
}
1193
return 1;
1194
}
1195
1196
/*
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1200
*/
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1203
return 0;
1204
}
1205
1206
struct ifreq ifr;
1207
if(not get_flags(if_entry->d_name, &ifr)){
1208
if(debug){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1211
}
1212
return 0;
1213
}
1214
1215
/* Reject down interfaces */
1216
if(not (ifr.ifr_flags & IFF_UP)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1219
if_entry->d_name);
1220
}
1221
return 0;
1222
}
1223
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1226
if(debug){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1228
if_entry->d_name);
1229
}
1230
return 0;
1231
}
1232
1233
if(not good_flags(if_entry->d_name, &ifr)){
1234
return 0;
1235
}
1236
return 1;
1237
}
1238
1239
int notdotentries(const struct dirent *direntry){
1240
/* Skip "." and ".." */
1241
if(direntry->d_name[0] == '.'
1242
and (direntry->d_name[1] == '\0'
1243
or (direntry->d_name[1] == '.'
1244
and direntry->d_name[2] == '\0'))){
1245
return 0;
1246
}
1247
return 1;
1248
}
1249
1250
/* Is this directory entry a runnable program? */
1251
int runnable_hook(const struct dirent *direntry){
1252
int ret;
1253
size_t sret;
1254
struct stat st;
1255
1256
if((direntry->d_name)[0] == '\0'){
1257
/* Empty name? */
1258
return 0;
1259
}
1260
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1263
"0123456789"
1264
"_-");
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1267
if(debug){
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1269
direntry->d_name);
1270
}
1271
return 0;
1272
}
1273
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1276
if(ret < 0){
1277
perror_plus("asprintf");
1278
return 0;
1279
}
1280
1281
ret = stat(fullname, &st);
1282
if(ret == -1){
1283
if(debug){
1284
perror_plus("Could not stat hook");
1285
}
1286
return 0;
1287
}
1288
if(not (S_ISREG(st.st_mode))){
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1294
return 0;
1295
}
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
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[0];
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
pid_t hook_pid = fork();
1399
if(hook_pid == 0){
1400
/* Child */
1401
dup2(devnull, STDIN_FILENO);
1402
close(devnull);
1403
dup2(STDERR_FILENO, STDOUT_FILENO);
1404
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1405
if(ret == -1){
1406
perror_plus("setenv");
1407
return false;
1408
}
1409
ret = setenv("DEVICE", interface, 1);
1410
if(ret == -1){
1411
perror_plus("setenv");
1412
return false;
1413
}
1414
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1415
if(ret == -1){
1416
perror_plus("setenv");
1417
return false;
1418
}
1419
ret = setenv("MODE", mode, 1);
1420
if(ret == -1){
1421
perror_plus("setenv");
1422
return false;
1423
}
1424
char *delaystring;
1425
ret = asprintf(&delaystring, "%f", delay);
1426
if(ret == -1){
1427
perror_plus("asprintf");
1428
return false;
1429
}
1430
ret = setenv("DELAY", delaystring, 1);
1431
if(ret == -1){
1432
free(delaystring);
1433
perror_plus("setenv");
1434
return false;
1435
}
1436
free(delaystring);
1437
ret = execl(fullname, direntry->d_name, mode, NULL);
1438
perror_plus("execl");
1439
} else {
1440
int status;
1441
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1442
perror_plus("waitpid");
1443
free(fullname);
1444
continue;
1445
}
1446
if(WIFEXITED(status)){
1447
if(WEXITSTATUS(status) != 0){
1448
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1449
" with status %d\n", direntry->d_name,
1450
WEXITSTATUS(status));
1451
free(fullname);
1452
continue;
1453
}
1454
} else if(WIFSIGNALED(status)){
1455
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1456
" signal %d\n", direntry->d_name,
1457
WTERMSIG(status));
1458
free(fullname);
1459
continue;
1460
} else {
1461
fprintf_plus(stderr, "Warning: network hook \"%s\""
1462
" crashed\n", direntry->d_name);
1463
free(fullname);
1464
continue;
1465
}
1466
}
1467
free(fullname);
1468
if(quit_now){
1469
break;
1470
}
1471
}
1472
close(devnull);
1473
}
1474
return true;
1475
}
1476
1477
978
int main(int argc, char *argv[]){
1478
979
AvahiSServiceBrowser *sb = NULL;
1479
980
int error;
1481
982
intmax_t tmpmax;
1482
983
char *tmp;
1483
984
int exitcode = EXIT_SUCCESS;
1484
const char *interface = "";
985
const char *interface = "eth0";
1485
986
struct ifreq network;
1486
987
int sd = -1;
1487
988
bool take_down_interface = false;
1488
989
uid_t uid;
1489
990
gid_t gid;
991
char *connect_to = NULL;
1490
992
char tempdir[] = "/tmp/mandosXXXXXX";
1491
993
bool tempdir_created = false;
1492
994
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1496
998
bool gnutls_initialized = false;
1497
999
bool gpgme_initialized = false;
1498
1000
float delay = 2.5f;
1499
double retry_interval = 10; /* 10s between trying a server and
1500
retrying the same server again */
1501
1001
1502
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1503
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1509
1009
errno = 0;
1510
1010
ret = setgid(gid);
1511
1011
if(ret == -1){
1512
perror_plus("setgid");
1012
perror("setgid");
1513
1013
}
1514
1014
1515
1015
/* Lower user privileges (temporarily) */
1516
1016
errno = 0;
1517
1017
ret = seteuid(uid);
1518
1018
if(ret == -1){
1519
perror_plus("seteuid");
1019
perror("seteuid");
1520
1020
}
1521
1021
1522
1022
if(quit_now){
1557
1057
.arg = "SECONDS",
1558
1058
.doc = "Maximum delay to wait for interface startup",
1559
1059
.group = 2 },
1560
{ .name = "retry", .key = 132,
1561
.arg = "SECONDS",
1562
.doc = "Retry interval used when denied by the mandos server",
1563
.group = 2 },
1564
{ .name = "network-hook-dir", .key = 133,
1565
.arg = "DIR",
1566
.doc = "Directory where network hooks are located",
1567
.group = 2 },
1568
1060
/*
1569
1061
* These reproduce what we would get without ARGP_NO_HELP
1570
1062
*/
1614
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1615
1107
argp_error(state, "Bad delay");
1616
1108
}
1617
case 132: /* --retry */
1618
errno = 0;
1619
retry_interval = strtod(arg, &tmp);
1620
if(errno != 0 or tmp == arg or *tmp != '\0'
1621
or (retry_interval * 1000) > INT_MAX
1622
or retry_interval < 0){
1623
argp_error(state, "Bad retry interval");
1624
}
1625
break;
1626
case 133: /* --network-hook-dir */
1627
hookdir = arg;
1628
1109
break;
1629
1110
/*
1630
1111
* These reproduce what we would get without ARGP_NO_HELP
1637
1118
argp_state_help(state, state->out_stream,
1638
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1639
1120
case 'V': /* --version */
1640
fprintf_plus(state->out_stream,
1641
"Mandos plugin mandos-client: ");
1642
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1643
1122
exit(argp_err_exit_status);
1644
1123
break;
1645
1124
default:
1660
1139
case ENOMEM:
1661
1140
default:
1662
1141
errno = ret;
1663
perror_plus("argp_parse");
1142
perror("argp_parse");
1664
1143
exitcode = EX_OSERR;
1665
1144
goto end;
1666
1145
case EINVAL:
1668
1147
goto end;
1669
1148
}
1670
1149
}
1671
1672
{
1673
/* Work around Debian bug #633582:
1674
<http://bugs.debian.org/633582> */
1675
struct stat st;
1676
1677
/* Re-raise priviliges */
1678
errno = 0;
1679
ret = seteuid(0);
1680
if(ret == -1){
1681
perror_plus("seteuid");
1682
}
1683
1684
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1685
int seckey_fd = open(seckey, O_RDONLY);
1686
if(seckey_fd == -1){
1687
perror_plus("open");
1688
} else {
1689
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1690
if(ret == -1){
1691
perror_plus("fstat");
1692
} else {
1693
if(S_ISREG(st.st_mode)
1694
and st.st_uid == 0 and st.st_gid == 0){
1695
ret = fchown(seckey_fd, uid, gid);
1696
if(ret == -1){
1697
perror_plus("fchown");
1698
}
1699
}
1700
}
1701
TEMP_FAILURE_RETRY(close(seckey_fd));
1702
}
1703
}
1704
1705
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1706
int pubkey_fd = open(pubkey, O_RDONLY);
1707
if(pubkey_fd == -1){
1708
perror_plus("open");
1709
} else {
1710
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1711
if(ret == -1){
1712
perror_plus("fstat");
1713
} else {
1714
if(S_ISREG(st.st_mode)
1715
and st.st_uid == 0 and st.st_gid == 0){
1716
ret = fchown(pubkey_fd, uid, gid);
1717
if(ret == -1){
1718
perror_plus("fchown");
1719
}
1720
}
1721
}
1722
TEMP_FAILURE_RETRY(close(pubkey_fd));
1723
}
1724
}
1725
1726
/* Lower privileges */
1727
errno = 0;
1728
ret = seteuid(uid);
1729
if(ret == -1){
1730
perror_plus("seteuid");
1731
}
1732
}
1733
1734
/* Run network hooks */
1735
{
1736
/* Re-raise priviliges */
1737
errno = 0;
1738
ret = seteuid(0);
1739
if(ret == -1){
1740
perror_plus("seteuid");
1741
}
1742
if(not run_network_hooks("start", interface, delay)){
1743
goto end;
1744
}
1745
/* Lower privileges */
1746
errno = 0;
1747
ret = seteuid(uid);
1748
if(ret == -1){
1749
perror_plus("seteuid");
1750
}
1751
}
1752
1150
1753
1151
if(not debug){
1754
1152
avahi_set_log_function(empty_log);
1755
1153
}
1756
1154
1757
if(interface[0] == '\0'){
1758
struct dirent **direntries;
1759
/* First look for interfaces that are up */
1760
ret = scandir(sys_class_net, &direntries, up_interface,
1761
alphasort);
1762
if(ret == 0){
1763
/* No up interfaces, look for any good interfaces */
1764
free(direntries);
1765
ret = scandir(sys_class_net, &direntries, good_interface,
1766
alphasort);
1767
}
1768
if(ret >= 1){
1769
/* Pick the first interface returned */
1770
interface = strdup(direntries[0]->d_name);
1771
if(debug){
1772
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1773
}
1774
if(interface == NULL){
1775
perror_plus("malloc");
1776
free(direntries);
1777
exitcode = EXIT_FAILURE;
1778
goto end;
1779
}
1780
free(direntries);
1781
} else {
1782
free(direntries);
1783
fprintf_plus(stderr, "Could not find a network interface\n");
1784
exitcode = EXIT_FAILURE;
1785
goto end;
1786
}
1787
}
1788
1789
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1790
1156
from the signal handler */
1791
1157
/* Initialize the pseudo-RNG for Avahi */
1792
1158
srand((unsigned int) time(NULL));
1793
1159
mc.simple_poll = avahi_simple_poll_new();
1794
1160
if(mc.simple_poll == NULL){
1795
fprintf_plus(stderr,
1796
"Avahi: Failed to create simple poll object.\n");
1797
exitcode = EX_UNAVAILABLE;
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1798
1163
goto end;
1799
1164
}
1800
1165
1801
1166
sigemptyset(&sigterm_action.sa_mask);
1802
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1803
1168
if(ret == -1){
1804
perror_plus("sigaddset");
1805
exitcode = EX_OSERR;
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1806
1171
goto end;
1807
1172
}
1808
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1809
1174
if(ret == -1){
1810
perror_plus("sigaddset");
1811
exitcode = EX_OSERR;
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1812
1177
goto end;
1813
1178
}
1814
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1815
1180
if(ret == -1){
1816
perror_plus("sigaddset");
1817
exitcode = EX_OSERR;
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1818
1183
goto end;
1819
1184
}
1820
1185
/* Need to check if the handler is SIG_IGN before handling:
1823
1188
*/
1824
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1825
1190
if(ret == -1){
1826
perror_plus("sigaction");
1827
return EX_OSERR;
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1828
1193
}
1829
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1830
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1831
1196
if(ret == -1){
1832
perror_plus("sigaction");
1833
exitcode = EX_OSERR;
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1834
1199
goto end;
1835
1200
}
1836
1201
}
1837
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1838
1203
if(ret == -1){
1839
perror_plus("sigaction");
1840
return EX_OSERR;
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1841
1206
}
1842
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1843
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1844
1209
if(ret == -1){
1845
perror_plus("sigaction");
1846
exitcode = EX_OSERR;
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1847
1212
goto end;
1848
1213
}
1849
1214
}
1850
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1851
1216
if(ret == -1){
1852
perror_plus("sigaction");
1853
return EX_OSERR;
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1854
1219
}
1855
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1856
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1857
1222
if(ret == -1){
1858
perror_plus("sigaction");
1859
exitcode = EX_OSERR;
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1860
1225
goto end;
1861
1226
}
1862
1227
}
1863
1228
1864
1229
/* If the interface is down, bring it up */
1865
if(strcmp(interface, "none") != 0){
1230
if(interface[0] != '\0'){
1866
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1867
1232
if(if_index == 0){
1868
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1869
exitcode = EX_UNAVAILABLE;
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1870
1235
goto end;
1871
1236
}
1872
1237
1878
1243
errno = 0;
1879
1244
ret = seteuid(0);
1880
1245
if(ret == -1){
1881
perror_plus("seteuid");
1246
perror("seteuid");
1882
1247
}
1883
1248
1884
1249
#ifdef __linux__
1888
1253
bool restore_loglevel = true;
1889
1254
if(ret == -1){
1890
1255
restore_loglevel = false;
1891
perror_plus("klogctl");
1256
perror("klogctl");
1892
1257
}
1893
1258
#endif /* __linux__ */
1894
1259
1895
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1896
1261
if(sd < 0){
1897
perror_plus("socket");
1898
exitcode = EX_OSERR;
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1899
1264
#ifdef __linux__
1900
1265
if(restore_loglevel){
1901
1266
ret = klogctl(7, NULL, 0);
1902
1267
if(ret == -1){
1903
perror_plus("klogctl");
1268
perror("klogctl");
1904
1269
}
1905
1270
}
1906
1271
#endif /* __linux__ */
1908
1273
errno = 0;
1909
1274
ret = seteuid(uid);
1910
1275
if(ret == -1){
1911
perror_plus("seteuid");
1276
perror("seteuid");
1912
1277
}
1913
1278
goto end;
1914
1279
}
1915
1280
strcpy(network.ifr_name, interface);
1916
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1917
1282
if(ret == -1){
1918
perror_plus("ioctl SIOCGIFFLAGS");
1283
perror("ioctl SIOCGIFFLAGS");
1919
1284
#ifdef __linux__
1920
1285
if(restore_loglevel){
1921
1286
ret = klogctl(7, NULL, 0);
1922
1287
if(ret == -1){
1923
perror_plus("klogctl");
1288
perror("klogctl");
1924
1289
}
1925
1290
}
1926
1291
#endif /* __linux__ */
1927
exitcode = EX_OSERR;
1292
exitcode = EXIT_FAILURE;
1928
1293
/* Lower privileges */
1929
1294
errno = 0;
1930
1295
ret = seteuid(uid);
1931
1296
if(ret == -1){
1932
perror_plus("seteuid");
1297
perror("seteuid");
1933
1298
}
1934
1299
goto end;
1935
1300
}
1939
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1940
1305
if(ret == -1){
1941
1306
take_down_interface = false;
1942
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1943
exitcode = EX_OSERR;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
1944
1309
#ifdef __linux__
1945
1310
if(restore_loglevel){
1946
1311
ret = klogctl(7, NULL, 0);
1947
1312
if(ret == -1){
1948
perror_plus("klogctl");
1313
perror("klogctl");
1949
1314
}
1950
1315
}
1951
1316
#endif /* __linux__ */
1953
1318
errno = 0;
1954
1319
ret = seteuid(uid);
1955
1320
if(ret == -1){
1956
perror_plus("seteuid");
1321
perror("seteuid");
1957
1322
}
1958
1323
goto end;
1959
1324
}
1960
1325
}
1961
/* Sleep checking until interface is running.
1962
Check every 0.25s, up to total time of delay */
1326
/* sleep checking until interface is running */
1963
1327
for(int i=0; i < delay * 4; i++){
1964
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1965
1329
if(ret == -1){
1966
perror_plus("ioctl SIOCGIFFLAGS");
1330
perror("ioctl SIOCGIFFLAGS");
1967
1331
} else if(network.ifr_flags & IFF_RUNNING){
1968
1332
break;
1969
1333
}
1970
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1971
1335
ret = nanosleep(&sleeptime, NULL);
1972
1336
if(ret == -1 and errno != EINTR){
1973
perror_plus("nanosleep");
1337
perror("nanosleep");
1974
1338
}
1975
1339
}
1976
1340
if(not take_down_interface){
1977
1341
/* We won't need the socket anymore */
1978
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1979
1343
if(ret == -1){
1980
perror_plus("close");
1344
perror("close");
1981
1345
}
1982
1346
}
1983
1347
#ifdef __linux__
1985
1349
/* Restores kernel loglevel to default */
1986
1350
ret = klogctl(7, NULL, 0);
1987
1351
if(ret == -1){
1988
perror_plus("klogctl");
1352
perror("klogctl");
1989
1353
}
1990
1354
}
1991
1355
#endif /* __linux__ */
1992
1356
/* Lower privileges */
1993
1357
errno = 0;
1994
/* Lower privileges */
1995
ret = seteuid(uid);
1996
if(ret == -1){
1997
perror_plus("seteuid");
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
1998
1370
}
1999
1371
}
2000
1372
2004
1376
2005
1377
ret = init_gnutls_global(pubkey, seckey);
2006
1378
if(ret == -1){
2007
fprintf_plus(stderr, "init_gnutls_global failed\n");
2008
exitcode = EX_UNAVAILABLE;
1379
fprintf(stderr, "init_gnutls_global failed\n");
1380
exitcode = EXIT_FAILURE;
2009
1381
goto end;
2010
1382
} else {
2011
1383
gnutls_initialized = true;
2015
1387
goto end;
2016
1388
}
2017
1389
1390
tempdir_created = true;
2018
1391
if(mkdtemp(tempdir) == NULL){
2019
perror_plus("mkdtemp");
1392
tempdir_created = false;
1393
perror("mkdtemp");
2020
1394
goto end;
2021
1395
}
2022
tempdir_created = true;
2023
1396
2024
1397
if(quit_now){
2025
1398
goto end;
2026
1399
}
2027
1400
2028
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
2029
fprintf_plus(stderr, "init_gpgme failed\n");
2030
exitcode = EX_UNAVAILABLE;
1402
fprintf(stderr, "init_gpgme failed\n");
1403
exitcode = EXIT_FAILURE;
2031
1404
goto end;
2032
1405
} else {
2033
1406
gpgme_initialized = true;
2042
1415
/* (Mainly meant for debugging) */
2043
1416
char *address = strrchr(connect_to, ':');
2044
1417
if(address == NULL){
2045
fprintf_plus(stderr, "No colon in address\n");
2046
exitcode = EX_USAGE;
1418
fprintf(stderr, "No colon in address\n");
1419
exitcode = EXIT_FAILURE;
2047
1420
goto end;
2048
1421
}
2049
1422
2056
1429
tmpmax = strtoimax(address+1, &tmp, 10);
2057
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2058
1431
or tmpmax != (uint16_t)tmpmax){
2059
fprintf_plus(stderr, "Bad port number\n");
2060
exitcode = EX_USAGE;
1432
fprintf(stderr, "Bad port number\n");
1433
exitcode = EXIT_FAILURE;
2061
1434
goto end;
2062
1435
}
2063
1436
2067
1440
2068
1441
port = (uint16_t)tmpmax;
2069
1442
*address = '\0';
1443
address = connect_to;
2070
1444
/* Colon in address indicates IPv6 */
2071
1445
int af;
2072
if(strchr(connect_to, ':') != NULL){
1446
if(strchr(address, ':') != NULL){
2073
1447
af = AF_INET6;
2074
/* Accept [] around IPv6 address - see RFC 5952 */
2075
if(connect_to[0] == '[' and address[-1] == ']')
2076
{
2077
connect_to++;
2078
address[-1] = '\0';
2079
}
2080
1448
} else {
2081
1449
af = AF_INET;
2082
1450
}
2083
address = connect_to;
2084
1451
2085
1452
if(quit_now){
2086
1453
goto end;
2087
1454
}
2088
1455
2089
while(not quit_now){
2090
ret = start_mandos_communication(address, port, if_index, af);
2091
if(quit_now or ret == 0){
2092
break;
2093
}
2094
if(debug){
2095
fprintf_plus(stderr, "Retrying in %d seconds\n",
2096
(int)retry_interval);
2097
}
2098
sleep((int)retry_interval);
2099
}
2100
2101
if (not quit_now){
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
2102
1460
exitcode = EXIT_SUCCESS;
2103
1461
}
2104
2105
1462
goto end;
2106
1463
}
2107
1464
2129
1486
2130
1487
/* Check if creating the Avahi server object succeeded */
2131
1488
if(mc.server == NULL){
2132
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2133
avahi_strerror(error));
2134
exitcode = EX_UNAVAILABLE;
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1490
avahi_strerror(error));
1491
exitcode = EXIT_FAILURE;
2135
1492
goto end;
2136
1493
}
2137
1494
2144
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2145
1502
NULL, 0, browse_callback, NULL);
2146
1503
if(sb == NULL){
2147
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2148
avahi_strerror(avahi_server_errno(mc.server)));
2149
exitcode = EX_UNAVAILABLE;
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1505
avahi_strerror(avahi_server_errno(mc.server)));
1506
exitcode = EXIT_FAILURE;
2150
1507
goto end;
2151
1508
}
2152
1509
2157
1514
/* Run the main loop */
2158
1515
2159
1516
if(debug){
2160
fprintf_plus(stderr, "Starting Avahi loop search\n");
2161
}
2162
2163
ret = avahi_loop_with_timeout(mc.simple_poll,
2164
(int)(retry_interval * 1000));
2165
if(debug){
2166
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2167
(ret == 0) ? "successfully" : "with error");
2168
}
1517
fprintf(stderr, "Starting Avahi loop search\n");
1518
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
2169
1521
2170
1522
end:
2171
1523
2172
1524
if(debug){
2173
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1525
fprintf(stderr, "%s exiting\n", argv[0]);
2174
1526
}
2175
1527
2176
1528
/* Cleanup things */
2192
1544
if(gpgme_initialized){
2193
1545
gpgme_release(mc.ctx);
2194
1546
}
2195
2196
/* Cleans up the circular linked list of Mandos servers the client
2197
has seen */
2198
if(mc.current_server != NULL){
2199
mc.current_server->prev->next = NULL;
2200
while(mc.current_server != NULL){
2201
server *next = mc.current_server->next;
2202
free(mc.current_server);
2203
mc.current_server = next;
2204
}
2205
}
2206
1547
2207
/* Re-raise priviliges */
2208
{
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
2209
1551
errno = 0;
2210
1552
ret = seteuid(0);
2211
1553
if(ret == -1){
2212
perror_plus("seteuid");
2213
}
2214
/* Run network hooks */
2215
if(not run_network_hooks("stop", interface, delay)){
2216
goto end;
2217
}
2218
2219
/* Take down the network interface */
2220
if(take_down_interface and geteuid() == 0){
1554
perror("seteuid");
1555
}
1556
if(geteuid() == 0){
2221
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2222
1558
if(ret == -1){
2223
perror_plus("ioctl SIOCGIFFLAGS");
2224
} else if(network.ifr_flags & IFF_UP){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
2225
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2226
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2227
1563
if(ret == -1){
2228
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1564
perror("ioctl SIOCSIFFLAGS");
2229
1565
}
2230
1566
}
2231
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2232
1568
if(ret == -1){
2233
perror_plus("close");
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
2234
1576
}
2235
1577
}
2236
1578
}
2237
/* Lower privileges permanently */
2238
errno = 0;
2239
ret = setuid(uid);
2240
if(ret == -1){
2241
perror_plus("setuid");
2242
}
2243
1579
2244
/* Removes the GPGME temp directory and all files inside */
1580
/* Removes the temp directory used by GPGME */
2245
1581
if(tempdir_created){
2246
struct dirent **direntries = NULL;
2247
struct dirent *direntry = NULL;
2248
int numentries = scandir(tempdir, &direntries, notdotentries,
2249
alphasort);
2250
if (numentries > 0){
2251
for(int i = 0; i < numentries; i++){
2252
direntry = direntries[i];
1582
DIR *d;
1583
struct dirent *direntry;
1584
d = opendir(tempdir);
1585
if(d == NULL){
1586
if(errno != ENOENT){
1587
perror("opendir");
1588
}
1589
} else {
1590
while(true){
1591
direntry = readdir(d);
1592
if(direntry == NULL){
1593
break;
1594
}
1595
/* Skip "." and ".." */
1596
if(direntry->d_name[0] == '.'
1597
and (direntry->d_name[1] == '\0'
1598
or (direntry->d_name[1] == '.'
1599
and direntry->d_name[2] == '\0'))){
1600
continue;
1601
}
2253
1602
char *fullname = NULL;
2254
1603
ret = asprintf(&fullname, "%s/%s", tempdir,
2255
1604
direntry->d_name);
2256
1605
if(ret < 0){
2257
perror_plus("asprintf");
1606
perror("asprintf");
2258
1607
continue;
2259
1608
}
2260
1609
ret = remove(fullname);
2261
1610
if(ret == -1){
2262
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2263
strerror(errno));
1611
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1612
strerror(errno));
2264
1613
}
2265
1614
free(fullname);
2266
1615
}
2267
}
2268
2269
/* need to clean even if 0 because man page doesn't specify */
2270
free(direntries);
2271
if (numentries == -1){
2272
perror_plus("scandir");
1616
closedir(d);
2273
1617
}
2274
1618
ret = rmdir(tempdir);
2275
1619
if(ret == -1 and errno != ENOENT){
2276
perror_plus("rmdir");
1620
perror("rmdir");
2277
1621
}
2278
1622
}
2279
1623
2284
1628
&old_sigterm_action,
2285
1629
NULL));
2286
1630
if(ret == -1){
2287
perror_plus("sigaction");
1631
perror("sigaction");
2288
1632
}
2289
1633
do {
2290
1634
ret = raise(signal_received);
2291
1635
} while(ret != 0 and errno == EINTR);
2292
1636
if(ret != 0){
2293
perror_plus("raise");
1637
perror("raise");
2294
1638
abort();
2295
1639
}
2296
1640
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0