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- Committer: Teddy Hogeborn
- Date: 2009-09-16 23:28:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090916232839-3o7i8qmcdcz5j1ya
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
"$syslog", thanks to Petter Reinholdtsen
<pere@hungry.com> (Debian bug #546928).
* initramfs-tools-script: Removed erroneous comment.
* plugins.d/askpass-fifo.c: Removed TEMP_FAILURE_RETRY since it is
not needed.
* plugins.d/mandos-client.c (main): Bug fix: Initialize
"old_sigterm_action".
* plugins.d/splashy.c (main): Bug fix: really check return value from
"sigaddset". Fix some warnings on
64-bit systems.
* plugins.d/usplash.c (termination_handler, main): Save received
signal and
re-raise it on
exit.
(usplash_write): Do not close FIFO, instead, take an additional file
descriptor pointer to it and open only when needed
(all callers changed). Abort immediately on EINTR.
Bug fix: Add NUL byte on single-word commands.
Ignore "interrupted_by_signal".
(makeprompt, find_usplash): New; broken out from "main()".
(find_usplash): Bug fix: close /proc/<pid>/cmdline FD on error.
(main): Reorganized to jump to a new "failure" label on any error.
Bug fix: check return values from sigaddset.
New variable "usplash_accessed" to flag if usplash(8) needs
to be killed and restarted. Removed the "an_error_occured"
variable.
"$syslog", thanks to Petter Reinholdtsen
<pere@hungry.com> (Debian bug #546928).
* initramfs-tools-script: Removed erroneous comment.
* plugins.d/askpass-fifo.c: Removed TEMP_FAILURE_RETRY since it is
not needed.
* plugins.d/mandos-client.c (main): Bug fix: Initialize
"old_sigterm_action".
* plugins.d/splashy.c (main): Bug fix: really check return value from
"sigaddset". Fix some warnings on
64-bit systems.
* plugins.d/usplash.c (termination_handler, main): Save received
signal and
re-raise it on
exit.
(usplash_write): Do not close FIFO, instead, take an additional file
descriptor pointer to it and open only when needed
(all callers changed). Abort immediately on EINTR.
Bug fix: Add NUL byte on single-word commands.
Ignore "interrupted_by_signal".
(makeprompt, find_usplash): New; broken out from "main()".
(find_usplash): Bug fix: close /proc/<pid>/cmdline FD on error.
(main): Reorganized to jump to a new "failure" label on any error.
Bug fix: check return values from sigaddset.
New variable "usplash_accessed" to flag if usplash(8) needs
to be killed and restarted. Removed the "an_error_occured"
variable.
- files removed:
- DBUS-API
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
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() */
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() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
75
setgid() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
79
79
argp_state, struct argp,
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
94
85
95
86
#ifdef __linux__
96
87
#include <sys/klog.h> /* klogctl() */
114
105
init_gnutls_session(),
115
106
GNUTLS_* */
116
107
#include <gnutls/openpgp.h>
117
/* gnutls_certificate_set_openpgp_key_file(),
118
GNUTLS_OPENPGP_FMT_BASE64 */
108
/* gnutls_certificate_set_openpgp_key_file(),
109
GNUTLS_OPENPGP_FMT_BASE64 */
119
110
120
111
/* GPGME */
121
112
#include <gpgme.h> /* All GPGME types, constants and
129
120
#define PATHDIR "/conf/conf.d/mandos"
130
121
#define SECKEY "seckey.txt"
131
122
#define PUBKEY "pubkey.txt"
132
#define HOOKDIR "/lib/mandos/network-hooks.d"
133
123
134
124
bool debug = false;
135
125
static const char mandos_protocol_version[] = "1";
136
126
const char *argp_program_version = "mandos-client " VERSION;
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
138
static const char sys_class_net[] = "/sys/class/net";
139
char *connect_to = NULL;
140
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
144
/* Doubly linked list that need to be circularly linked when used */
145
typedef struct server{
146
const char *ip;
147
in_port_t port;
148
AvahiIfIndex if_index;
149
int af;
150
struct timespec last_seen;
151
struct server *next;
152
struct server *prev;
153
} server;
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
154
128
155
129
/* Used for passing in values through the Avahi callback functions */
156
130
typedef struct {
131
AvahiSimplePoll *simple_poll;
157
132
AvahiServer *server;
158
133
gnutls_certificate_credentials_t cred;
159
134
unsigned int dh_bits;
160
135
gnutls_dh_params_t dh_params;
161
136
const char *priority;
162
137
gpgme_ctx_t ctx;
163
server *current_server;
164
138
} mandos_context;
165
139
166
/* global so signal handler can reach it*/
167
AvahiSimplePoll *simple_poll;
168
169
sig_atomic_t quit_now = 0;
170
int signal_received = 0;
171
172
/* Function to use when printing errors */
173
void perror_plus(const char *print_text){
174
int e = errno;
175
fprintf(stderr, "Mandos plugin %s: ",
176
program_invocation_short_name);
177
errno = e;
178
perror(print_text);
179
}
180
181
__attribute__((format (gnu_printf, 2, 3)))
182
int fprintf_plus(FILE *stream, const char *format, ...){
183
va_list ap;
184
va_start (ap, format);
185
186
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
187
program_invocation_short_name));
188
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
189
}
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
190
144
191
145
/*
192
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
194
148
* "buffer_length" is how much is already used.
195
149
*/
196
150
size_t incbuffer(char **buffer, size_t buffer_length,
197
size_t buffer_capacity){
151
size_t buffer_capacity){
198
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
199
153
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
154
if(buffer == NULL){
205
159
return buffer_capacity;
206
160
}
207
161
208
/* Add server to set of servers to retry periodically */
209
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
210
int af, server **current_server){
211
int ret;
212
server *new_server = malloc(sizeof(server));
213
if(new_server == NULL){
214
perror_plus("malloc");
215
return false;
216
}
217
*new_server = (server){ .ip = strdup(ip),
218
.port = port,
219
.if_index = if_index,
220
.af = af };
221
if(new_server->ip == NULL){
222
perror_plus("strdup");
223
return false;
224
}
225
/* Special case of first server */
226
if(*current_server == NULL){
227
new_server->next = new_server;
228
new_server->prev = new_server;
229
*current_server = new_server;
230
/* Place the new server last in the list */
231
} else {
232
new_server->next = *current_server;
233
new_server->prev = (*current_server)->prev;
234
new_server->prev->next = new_server;
235
(*current_server)->prev = new_server;
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
return true;
243
}
244
245
162
/*
246
163
* Initialize GPGME.
247
164
*/
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
165
static bool init_gpgme(const char *seckey,
166
const char *pubkey, const char *tempdir){
250
167
gpgme_error_t rc;
251
168
gpgme_engine_info_t engine_info;
252
169
170
253
171
/*
254
172
* Helper function to insert pub and seckey to the engine keyring.
255
173
*/
260
178
261
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
262
180
if(fd == -1){
263
perror_plus("open");
181
perror("open");
264
182
return false;
265
183
}
266
184
267
185
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
186
if(rc != GPG_ERR_NO_ERROR){
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
187
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
188
gpgme_strsource(rc), gpgme_strerror(rc));
271
189
return false;
272
190
}
273
191
274
rc = gpgme_op_import(mc->ctx, pgp_data);
192
rc = gpgme_op_import(mc.ctx, pgp_data);
275
193
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
278
196
return false;
279
197
}
280
198
281
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
282
200
if(ret == -1){
283
perror_plus("close");
201
perror("close");
284
202
}
285
203
gpgme_data_release(pgp_data);
286
204
return true;
287
205
}
288
206
289
207
if(debug){
290
fprintf_plus(stderr, "Initializing GPGME\n");
208
fprintf(stderr, "Initializing GPGME\n");
291
209
}
292
210
293
211
/* Init GPGME */
294
212
gpgme_check_version(NULL);
295
213
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
296
214
if(rc != GPG_ERR_NO_ERROR){
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
215
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
216
gpgme_strsource(rc), gpgme_strerror(rc));
299
217
return false;
300
218
}
301
219
302
/* Set GPGME home directory for the OpenPGP engine only */
220
/* Set GPGME home directory for the OpenPGP engine only */
303
221
rc = gpgme_get_engine_info(&engine_info);
304
222
if(rc != GPG_ERR_NO_ERROR){
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
223
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
307
225
return false;
308
226
}
309
227
while(engine_info != NULL){
315
233
engine_info = engine_info->next;
316
234
}
317
235
if(engine_info == NULL){
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
236
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
320
237
return false;
321
238
}
322
239
323
240
/* Create new GPGME "context" */
324
rc = gpgme_new(&(mc->ctx));
241
rc = gpgme_new(&(mc.ctx));
325
242
if(rc != GPG_ERR_NO_ERROR){
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
243
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
gpgme_strsource(rc), gpgme_strerror(rc));
329
245
return false;
330
246
}
331
247
342
258
*/
343
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
344
260
size_t crypto_size,
345
char **plaintext,
346
mandos_context *mc){
261
char **plaintext){
347
262
gpgme_data_t dh_crypto, dh_plain;
348
263
gpgme_error_t rc;
349
264
ssize_t ret;
351
266
ssize_t plaintext_length = 0;
352
267
353
268
if(debug){
354
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
269
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
355
270
}
356
271
357
272
/* Create new GPGME data buffer from memory cryptotext */
358
273
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
359
274
0);
360
275
if(rc != GPG_ERR_NO_ERROR){
361
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
363
278
return -1;
364
279
}
365
280
366
281
/* Create new empty GPGME data buffer for the plaintext */
367
282
rc = gpgme_data_new(&dh_plain);
368
283
if(rc != GPG_ERR_NO_ERROR){
369
fprintf_plus(stderr, "Mandos plugin mandos-client: "
370
"bad gpgme_data_new: %s: %s\n",
371
gpgme_strsource(rc), gpgme_strerror(rc));
284
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
285
gpgme_strsource(rc), gpgme_strerror(rc));
372
286
gpgme_data_release(dh_crypto);
373
287
return -1;
374
288
}
375
289
376
290
/* Decrypt data from the cryptotext data buffer to the plaintext
377
291
data buffer */
378
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
379
293
if(rc != GPG_ERR_NO_ERROR){
380
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
381
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
382
296
plaintext_length = -1;
383
297
if(debug){
384
298
gpgme_decrypt_result_t result;
385
result = gpgme_op_decrypt_result(mc->ctx);
299
result = gpgme_op_decrypt_result(mc.ctx);
386
300
if(result == NULL){
387
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
388
302
} else {
389
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
390
result->unsupported_algorithm);
391
fprintf_plus(stderr, "Wrong key usage: %u\n",
392
result->wrong_key_usage);
303
fprintf(stderr, "Unsupported algorithm: %s\n",
304
result->unsupported_algorithm);
305
fprintf(stderr, "Wrong key usage: %u\n",
306
result->wrong_key_usage);
393
307
if(result->file_name != NULL){
394
fprintf_plus(stderr, "File name: %s\n", result->file_name);
308
fprintf(stderr, "File name: %s\n", result->file_name);
395
309
}
396
310
gpgme_recipient_t recipient;
397
311
recipient = result->recipients;
398
312
while(recipient != NULL){
399
fprintf_plus(stderr, "Public key algorithm: %s\n",
400
gpgme_pubkey_algo_name
401
(recipient->pubkey_algo));
402
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
403
fprintf_plus(stderr, "Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
313
fprintf(stderr, "Public key algorithm: %s\n",
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
317
recipient->status == GPG_ERR_NO_SECKEY
318
? "No" : "Yes");
406
319
recipient = recipient->next;
407
320
}
408
321
}
411
324
}
412
325
413
326
if(debug){
414
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
327
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
415
328
}
416
329
417
330
/* Seek back to the beginning of the GPGME plaintext data buffer */
418
331
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
419
perror_plus("gpgme_data_seek");
332
perror("gpgme_data_seek");
420
333
plaintext_length = -1;
421
334
goto decrypt_end;
422
335
}
424
337
*plaintext = NULL;
425
338
while(true){
426
339
plaintext_capacity = incbuffer(plaintext,
427
(size_t)plaintext_length,
428
plaintext_capacity);
340
(size_t)plaintext_length,
341
plaintext_capacity);
429
342
if(plaintext_capacity == 0){
430
perror_plus("incbuffer");
431
plaintext_length = -1;
432
goto decrypt_end;
343
perror("incbuffer");
344
plaintext_length = -1;
345
goto decrypt_end;
433
346
}
434
347
435
348
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
440
353
break;
441
354
}
442
355
if(ret < 0){
443
perror_plus("gpgme_data_read");
356
perror("gpgme_data_read");
444
357
plaintext_length = -1;
445
358
goto decrypt_end;
446
359
}
448
361
}
449
362
450
363
if(debug){
451
fprintf_plus(stderr, "Decrypted password is: ");
364
fprintf(stderr, "Decrypted password is: ");
452
365
for(ssize_t i = 0; i < plaintext_length; i++){
453
366
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
454
367
}
466
379
}
467
380
468
381
static const char * safer_gnutls_strerror(int value){
469
const char *ret = gnutls_strerror(value);
382
const char *ret = gnutls_strerror(value); /* Spurious warning from
383
-Wunreachable-code */
470
384
if(ret == NULL)
471
385
ret = "(unknown)";
472
386
return ret;
475
389
/* GnuTLS log function callback */
476
390
static void debuggnutls(__attribute__((unused)) int level,
477
391
const char* string){
478
fprintf_plus(stderr, "GnuTLS: %s", string);
392
fprintf(stderr, "GnuTLS: %s", string);
479
393
}
480
394
481
395
static int init_gnutls_global(const char *pubkeyfilename,
482
const char *seckeyfilename,
483
mandos_context *mc){
396
const char *seckeyfilename){
484
397
int ret;
485
398
486
399
if(debug){
487
fprintf_plus(stderr, "Initializing GnuTLS\n");
400
fprintf(stderr, "Initializing GnuTLS\n");
488
401
}
489
402
490
403
ret = gnutls_global_init();
491
404
if(ret != GNUTLS_E_SUCCESS){
492
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
493
safer_gnutls_strerror(ret));
405
fprintf(stderr, "GnuTLS global_init: %s\n",
406
safer_gnutls_strerror(ret));
494
407
return -1;
495
408
}
496
409
503
416
}
504
417
505
418
/* OpenPGP credentials */
506
ret = gnutls_certificate_allocate_credentials(&mc->cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
507
420
if(ret != GNUTLS_E_SUCCESS){
508
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
509
safer_gnutls_strerror(ret));
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
425
safer_gnutls_strerror(ret));
510
426
gnutls_global_deinit();
511
427
return -1;
512
428
}
513
429
514
430
if(debug){
515
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
516
" secret key %s as GnuTLS credentials\n",
517
pubkeyfilename,
518
seckeyfilename);
431
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
432
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
433
seckeyfilename);
519
434
}
520
435
521
436
ret = gnutls_certificate_set_openpgp_key_file
522
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
523
438
GNUTLS_OPENPGP_FMT_BASE64);
524
439
if(ret != GNUTLS_E_SUCCESS){
525
fprintf_plus(stderr,
526
"Error[%d] while reading the OpenPGP key pair ('%s',"
527
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
528
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
529
safer_gnutls_strerror(ret));
440
fprintf(stderr,
441
"Error[%d] while reading the OpenPGP key pair ('%s',"
442
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
443
fprintf(stderr, "The GnuTLS error is: %s\n",
444
safer_gnutls_strerror(ret));
530
445
goto globalfail;
531
446
}
532
447
533
448
/* GnuTLS server initialization */
534
ret = gnutls_dh_params_init(&mc->dh_params);
449
ret = gnutls_dh_params_init(&mc.dh_params);
535
450
if(ret != GNUTLS_E_SUCCESS){
536
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
537
" initialization: %s\n",
538
safer_gnutls_strerror(ret));
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
" %s\n", safer_gnutls_strerror(ret));
539
453
goto globalfail;
540
454
}
541
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
542
456
if(ret != GNUTLS_E_SUCCESS){
543
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
544
safer_gnutls_strerror(ret));
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
safer_gnutls_strerror(ret));
545
459
goto globalfail;
546
460
}
547
461
548
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
549
463
550
464
return 0;
551
465
552
466
globalfail:
553
467
554
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
555
469
gnutls_global_deinit();
556
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
557
471
return -1;
558
472
}
559
473
560
static int init_gnutls_session(gnutls_session_t *session,
561
mandos_context *mc){
474
static int init_gnutls_session(gnutls_session_t *session){
562
475
int ret;
563
476
/* GnuTLS session creation */
564
477
do {
565
478
ret = gnutls_init(session, GNUTLS_SERVER);
566
if(quit_now){
567
return -1;
568
}
569
479
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
570
480
if(ret != GNUTLS_E_SUCCESS){
571
fprintf_plus(stderr,
572
"Error in GnuTLS session initialization: %s\n",
573
safer_gnutls_strerror(ret));
481
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
482
safer_gnutls_strerror(ret));
574
483
}
575
484
576
485
{
577
486
const char *err;
578
487
do {
579
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
580
if(quit_now){
581
gnutls_deinit(*session);
582
return -1;
583
}
488
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
584
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
585
490
if(ret != GNUTLS_E_SUCCESS){
586
fprintf_plus(stderr, "Syntax error at: %s\n", err);
587
fprintf_plus(stderr, "GnuTLS error: %s\n",
588
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Syntax error at: %s\n", err);
492
fprintf(stderr, "GnuTLS error: %s\n",
493
safer_gnutls_strerror(ret));
589
494
gnutls_deinit(*session);
590
495
return -1;
591
496
}
593
498
594
499
do {
595
500
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
596
mc->cred);
597
if(quit_now){
598
gnutls_deinit(*session);
599
return -1;
600
}
501
mc.cred);
601
502
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
602
503
if(ret != GNUTLS_E_SUCCESS){
603
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
604
safer_gnutls_strerror(ret));
504
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
505
safer_gnutls_strerror(ret));
605
506
gnutls_deinit(*session);
606
507
return -1;
607
508
}
609
510
/* ignore client certificate if any. */
610
511
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
611
512
612
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
513
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
613
514
614
515
return 0;
615
516
}
618
519
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
619
520
__attribute__((unused)) const char *txt){}
620
521
522
sig_atomic_t quit_now = 0;
523
int signal_received = 0;
524
621
525
/* Called when a Mandos server is found */
622
static int start_mandos_communication(const char *ip, in_port_t port,
526
static int start_mandos_communication(const char *ip, uint16_t port,
623
527
AvahiIfIndex if_index,
624
int af, mandos_context *mc){
528
int af){
625
529
int ret, tcp_sd = -1;
626
530
ssize_t sret;
627
531
union {
629
533
struct sockaddr_in6 in6;
630
534
} to;
631
535
char *buffer = NULL;
632
char *decrypted_buffer = NULL;
536
char *decrypted_buffer;
633
537
size_t buffer_length = 0;
634
538
size_t buffer_capacity = 0;
635
539
size_t written;
636
int retval = -1;
540
int retval = 0;
637
541
gnutls_session_t session;
638
542
int pf; /* Protocol family */
639
543
640
errno = 0;
641
642
544
if(quit_now){
643
errno = EINTR;
644
545
return -1;
645
546
}
646
547
652
553
pf = PF_INET;
653
554
break;
654
555
default:
655
fprintf_plus(stderr, "Bad address family: %d\n", af);
656
errno = EINVAL;
556
fprintf(stderr, "Bad address family: %d\n", af);
657
557
return -1;
658
558
}
659
559
660
ret = init_gnutls_session(&session, mc);
560
ret = init_gnutls_session(&session);
661
561
if(ret != 0){
662
562
return -1;
663
563
}
664
564
665
565
if(debug){
666
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIuMAX "\n", ip, (uintmax_t)port);
566
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
567
"\n", ip, port);
668
568
}
669
569
670
570
tcp_sd = socket(pf, SOCK_STREAM, 0);
671
571
if(tcp_sd < 0){
672
int e = errno;
673
perror_plus("socket");
674
errno = e;
572
perror("socket");
573
retval = -1;
675
574
goto mandos_end;
676
575
}
677
576
678
577
if(quit_now){
679
errno = EINTR;
680
578
goto mandos_end;
681
579
}
682
580
689
587
ret = inet_pton(af, ip, &to.in.sin_addr);
690
588
}
691
589
if(ret < 0 ){
692
int e = errno;
693
perror_plus("inet_pton");
694
errno = e;
590
perror("inet_pton");
591
retval = -1;
695
592
goto mandos_end;
696
593
}
697
594
if(ret == 0){
698
int e = errno;
699
fprintf_plus(stderr, "Bad address: %s\n", ip);
700
errno = e;
595
fprintf(stderr, "Bad address: %s\n", ip);
596
retval = -1;
701
597
goto mandos_end;
702
598
}
703
599
if(af == AF_INET6){
704
to.in6.sin6_port = htons(port);
600
to.in6.sin6_port = htons(port); /* Spurious warnings from
601
-Wconversion and
602
-Wunreachable-code */
603
705
604
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
605
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
606
-Wunreachable-code*/
708
607
if(if_index == AVAHI_IF_UNSPEC){
709
fprintf_plus(stderr, "An IPv6 link-local address is"
710
" incomplete without a network interface\n");
711
errno = EINVAL;
608
fprintf(stderr, "An IPv6 link-local address is incomplete"
609
" without a network interface\n");
610
retval = -1;
712
611
goto mandos_end;
713
612
}
714
613
/* Set the network interface number as scope */
721
620
}
722
621
723
622
if(quit_now){
724
errno = EINTR;
725
623
goto mandos_end;
726
624
}
727
625
729
627
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
730
628
char interface[IF_NAMESIZE];
731
629
if(if_indextoname((unsigned int)if_index, interface) == NULL){
732
perror_plus("if_indextoname");
630
perror("if_indextoname");
733
631
} else {
734
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
735
"\n", ip, interface, (uintmax_t)port);
632
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
633
ip, interface, port);
736
634
}
737
635
} else {
738
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
739
ip, (uintmax_t)port);
636
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
637
port);
740
638
}
741
639
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
640
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
749
647
sizeof(addrstr));
750
648
}
751
649
if(pcret == NULL){
752
perror_plus("inet_ntop");
650
perror("inet_ntop");
753
651
} else {
754
652
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
653
fprintf(stderr, "Canonical address form: %s\n", addrstr);
756
654
}
757
655
}
758
656
}
759
657
760
658
if(quit_now){
761
errno = EINTR;
762
659
goto mandos_end;
763
660
}
764
661
768
665
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
769
666
}
770
667
if(ret < 0){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
772
int e = errno;
773
perror_plus("connect");
774
errno = e;
775
}
668
perror("connect");
669
retval = -1;
776
670
goto mandos_end;
777
671
}
778
672
779
673
if(quit_now){
780
errno = EINTR;
781
674
goto mandos_end;
782
675
}
783
676
786
679
while(true){
787
680
size_t out_size = strlen(out);
788
681
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
789
out_size - written));
682
out_size - written));
790
683
if(ret == -1){
791
int e = errno;
792
perror_plus("write");
793
errno = e;
684
perror("write");
685
retval = -1;
794
686
goto mandos_end;
795
687
}
796
688
written += (size_t)ret;
806
698
}
807
699
808
700
if(quit_now){
809
errno = EINTR;
810
701
goto mandos_end;
811
702
}
812
703
}
813
704
814
705
if(debug){
815
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
706
fprintf(stderr, "Establishing TLS session with %s\n", ip);
816
707
}
817
708
818
709
if(quit_now){
819
errno = EINTR;
820
710
goto mandos_end;
821
711
}
822
712
823
/* This casting via intptr_t is to eliminate warning about casting
824
an int to a pointer type. This is exactly how the GnuTLS Guile
825
function "set-session-transport-fd!" does it. */
826
gnutls_transport_set_ptr(session,
827
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
713
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
828
714
829
715
if(quit_now){
830
errno = EINTR;
831
716
goto mandos_end;
832
717
}
833
718
834
719
do {
835
720
ret = gnutls_handshake(session);
836
721
if(quit_now){
837
errno = EINTR;
838
722
goto mandos_end;
839
723
}
840
724
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
841
725
842
726
if(ret != GNUTLS_E_SUCCESS){
843
727
if(debug){
844
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
728
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
845
729
gnutls_perror(ret);
846
730
}
847
errno = EPROTO;
731
retval = -1;
848
732
goto mandos_end;
849
733
}
850
734
851
735
/* Read OpenPGP packet that contains the wanted password */
852
736
853
737
if(debug){
854
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
855
" %s\n", ip);
738
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
739
ip);
856
740
}
857
741
858
742
while(true){
859
743
860
744
if(quit_now){
861
errno = EINTR;
862
745
goto mandos_end;
863
746
}
864
747
865
748
buffer_capacity = incbuffer(&buffer, buffer_length,
866
buffer_capacity);
749
buffer_capacity);
867
750
if(buffer_capacity == 0){
868
int e = errno;
869
perror_plus("incbuffer");
870
errno = e;
751
perror("incbuffer");
752
retval = -1;
871
753
goto mandos_end;
872
754
}
873
755
874
756
if(quit_now){
875
errno = EINTR;
876
757
goto mandos_end;
877
758
}
878
759
891
772
ret = gnutls_handshake(session);
892
773
893
774
if(quit_now){
894
errno = EINTR;
895
775
goto mandos_end;
896
776
}
897
777
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
898
778
if(ret < 0){
899
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
900
"***\n");
779
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
901
780
gnutls_perror(ret);
902
errno = EPROTO;
781
retval = -1;
903
782
goto mandos_end;
904
783
}
905
784
break;
906
785
default:
907
fprintf_plus(stderr, "Unknown error while reading data from"
908
" encrypted session with Mandos server\n");
786
fprintf(stderr, "Unknown error while reading data from"
787
" encrypted session with Mandos server\n");
788
retval = -1;
909
789
gnutls_bye(session, GNUTLS_SHUT_RDWR);
910
errno = EIO;
911
790
goto mandos_end;
912
791
}
913
792
} else {
916
795
}
917
796
918
797
if(debug){
919
fprintf_plus(stderr, "Closing TLS session\n");
920
}
921
922
if(quit_now){
923
errno = EINTR;
924
goto mandos_end;
925
}
926
927
do {
928
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
929
if(quit_now){
930
errno = EINTR;
931
goto mandos_end;
932
}
933
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
798
fprintf(stderr, "Closing TLS session\n");
799
}
800
801
if(quit_now){
802
goto mandos_end;
803
}
804
805
gnutls_bye(session, GNUTLS_SHUT_RDWR);
806
807
if(quit_now){
808
goto mandos_end;
809
}
934
810
935
811
if(buffer_length > 0){
936
812
ssize_t decrypted_buffer_size;
937
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
938
&decrypted_buffer, mc);
813
decrypted_buffer_size = pgp_packet_decrypt(buffer,
814
buffer_length,
815
&decrypted_buffer);
939
816
if(decrypted_buffer_size >= 0){
940
817
941
818
written = 0;
942
819
while(written < (size_t) decrypted_buffer_size){
943
820
if(quit_now){
944
errno = EINTR;
945
821
goto mandos_end;
946
822
}
947
823
949
825
(size_t)decrypted_buffer_size - written,
950
826
stdout);
951
827
if(ret == 0 and ferror(stdout)){
952
int e = errno;
953
828
if(debug){
954
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
955
strerror(errno));
829
fprintf(stderr, "Error writing encrypted data: %s\n",
830
strerror(errno));
956
831
}
957
errno = e;
958
goto mandos_end;
832
retval = -1;
833
break;
959
834
}
960
835
written += (size_t)ret;
961
836
}
962
retval = 0;
837
free(decrypted_buffer);
838
} else {
839
retval = -1;
963
840
}
841
} else {
842
retval = -1;
964
843
}
965
844
966
845
/* Shutdown procedure */
967
846
968
847
mandos_end:
969
{
970
int e = errno;
971
free(decrypted_buffer);
972
free(buffer);
973
if(tcp_sd >= 0){
974
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
975
}
976
if(ret == -1){
977
if(e == 0){
978
e = errno;
979
}
980
perror_plus("close");
981
}
982
gnutls_deinit(session);
983
errno = e;
984
if(quit_now){
985
errno = EINTR;
986
retval = -1;
987
}
848
free(buffer);
849
if(tcp_sd >= 0){
850
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
851
}
852
if(ret == -1){
853
perror("close");
854
}
855
gnutls_deinit(session);
856
if(quit_now){
857
retval = -1;
988
858
}
989
859
return retval;
990
860
}
1002
872
AVAHI_GCC_UNUSED AvahiStringList *txt,
1003
873
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1004
874
flags,
1005
void* mc){
1006
if(r == NULL){
1007
return;
1008
}
875
AVAHI_GCC_UNUSED void* userdata){
876
assert(r);
1009
877
1010
878
/* Called whenever a service has been resolved successfully or
1011
879
timed out */
1017
885
switch(event){
1018
886
default:
1019
887
case AVAHI_RESOLVER_FAILURE:
1020
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1021
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1022
domain,
1023
avahi_strerror(avahi_server_errno
1024
(((mandos_context*)mc)->server)));
888
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
889
" of type '%s' in domain '%s': %s\n", name, type, domain,
890
avahi_strerror(avahi_server_errno(mc.server)));
1025
891
break;
1026
892
1027
893
case AVAHI_RESOLVER_FOUND:
1029
895
char ip[AVAHI_ADDRESS_STR_MAX];
1030
896
avahi_address_snprint(ip, sizeof(ip), address);
1031
897
if(debug){
1032
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1033
PRIdMAX ") on port %" PRIu16 "\n", name,
1034
host_name, ip, (intmax_t)interface, port);
898
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
899
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
900
ip, (intmax_t)interface, port);
1035
901
}
1036
int ret = start_mandos_communication(ip, (in_port_t)port,
1037
interface,
1038
avahi_proto_to_af(proto),
1039
mc);
902
int ret = start_mandos_communication(ip, port, interface,
903
avahi_proto_to_af(proto));
1040
904
if(ret == 0){
1041
avahi_simple_poll_quit(simple_poll);
1042
} else {
1043
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto),
1045
&((mandos_context*)mc)->current_server)){
1046
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1047
" list\n", name);
1048
}
905
avahi_simple_poll_quit(mc.simple_poll);
1049
906
}
1050
907
}
1051
908
}
1061
918
const char *domain,
1062
919
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1063
920
flags,
1064
void* mc){
1065
if(b == NULL){
1066
return;
1067
}
921
AVAHI_GCC_UNUSED void* userdata){
922
assert(b);
1068
923
1069
924
/* Called whenever a new services becomes available on the LAN or
1070
925
is removed from the LAN */
1077
932
default:
1078
933
case AVAHI_BROWSER_FAILURE:
1079
934
1080
fprintf_plus(stderr, "(Avahi browser) %s\n",
1081
avahi_strerror(avahi_server_errno
1082
(((mandos_context*)mc)->server)));
1083
avahi_simple_poll_quit(simple_poll);
935
fprintf(stderr, "(Avahi browser) %s\n",
936
avahi_strerror(avahi_server_errno(mc.server)));
937
avahi_simple_poll_quit(mc.simple_poll);
1084
938
return;
1085
939
1086
940
case AVAHI_BROWSER_NEW:
1089
943
the callback function is called the Avahi server will free the
1090
944
resolver for us. */
1091
945
1092
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1093
interface, protocol, name, type,
1094
domain, protocol, 0,
1095
resolve_callback, mc) == NULL)
1096
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1097
" %s\n", name,
1098
avahi_strerror(avahi_server_errno
1099
(((mandos_context*)mc)->server)));
946
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
947
name, type, domain, protocol, 0,
948
resolve_callback, NULL) == NULL)
949
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
950
name, avahi_strerror(avahi_server_errno(mc.server)));
1100
951
break;
1101
952
1102
953
case AVAHI_BROWSER_REMOVE:
1105
956
case AVAHI_BROWSER_ALL_FOR_NOW:
1106
957
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1107
958
if(debug){
1108
fprintf_plus(stderr, "No Mandos server found, still"
1109
" searching...\n");
959
fprintf(stderr, "No Mandos server found, still searching...\n");
1110
960
}
1111
961
break;
1112
962
}
1113
963
}
1114
964
1115
/* Signal handler that stops main loop after SIGTERM */
965
/* stop main loop after sigterm has been called */
1116
966
static void handle_sigterm(int sig){
1117
967
if(quit_now){
1118
968
return;
1120
970
quit_now = 1;
1121
971
signal_received = sig;
1122
972
int old_errno = errno;
1123
/* set main loop to exit */
1124
if(simple_poll != NULL){
1125
avahi_simple_poll_quit(simple_poll);
1126
}
1127
errno = old_errno;
1128
}
1129
1130
bool get_flags(const char *ifname, struct ifreq *ifr){
1131
int ret;
1132
error_t ret_errno;
1133
1134
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1135
if(s < 0){
1136
ret_errno = errno;
1137
perror_plus("socket");
1138
errno = ret_errno;
1139
return false;
1140
}
1141
strcpy(ifr->ifr_name, ifname);
1142
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1143
if(ret == -1){
1144
if(debug){
1145
ret_errno = errno;
1146
perror_plus("ioctl SIOCGIFFLAGS");
1147
errno = ret_errno;
1148
}
1149
return false;
1150
}
1151
return true;
1152
}
1153
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1156
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1158
if(debug){
1159
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1160
ifname);
1161
}
1162
return false;
1163
}
1164
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1166
if(debug){
1167
fprintf_plus(stderr, "Accepting point-to-point interface"
1168
" \"%s\"\n", ifname);
1169
}
1170
return true;
1171
}
1172
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1174
if(debug){
1175
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1176
" \"%s\"\n", ifname);
1177
}
1178
return false;
1179
}
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1182
if(debug){
1183
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1184
ifname);
1185
}
1186
return false;
1187
}
1188
1189
/* Accept this device */
1190
if(debug){
1191
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1192
}
1193
return true;
1194
}
1195
1196
/*
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device.
1199
* (This function is passed to scandir(3) as a filter function.)
1200
*/
1201
int good_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
if(not good_flags(if_entry->d_name, &ifr)){
1216
return 0;
1217
}
1218
return 1;
1219
}
1220
1221
/*
1222
* This function determines if a network interface is up.
1223
*/
1224
bool interface_is_up(const char *interface){
1225
struct ifreq ifr;
1226
if(not get_flags(interface, &ifr)){
1227
if(debug){
1228
fprintf_plus(stderr, "Failed to get flags for interface "
1229
"\"%s\"\n", interface);
1230
}
1231
return false;
1232
}
1233
1234
return (bool)(ifr.ifr_flags & IFF_UP);
1235
}
1236
1237
/*
1238
* This function determines if a network interface is running
1239
*/
1240
bool interface_is_running(const char *interface){
1241
struct ifreq ifr;
1242
if(not get_flags(interface, &ifr)){
1243
if(debug){
1244
fprintf_plus(stderr, "Failed to get flags for interface "
1245
"\"%s\"\n", interface);
1246
}
1247
return false;
1248
}
1249
1250
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1251
}
1252
1253
int notdotentries(const struct dirent *direntry){
1254
/* Skip "." and ".." */
1255
if(direntry->d_name[0] == '.'
1256
and (direntry->d_name[1] == '\0'
1257
or (direntry->d_name[1] == '.'
1258
and direntry->d_name[2] == '\0'))){
1259
return 0;
1260
}
1261
return 1;
1262
}
1263
1264
/* Is this directory entry a runnable program? */
1265
int runnable_hook(const struct dirent *direntry){
1266
int ret;
1267
size_t sret;
1268
struct stat st;
1269
1270
if((direntry->d_name)[0] == '\0'){
1271
/* Empty name? */
1272
return 0;
1273
}
1274
1275
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1276
"abcdefghijklmnopqrstuvwxyz"
1277
"0123456789"
1278
"_-");
1279
if((direntry->d_name)[sret] != '\0'){
1280
/* Contains non-allowed characters */
1281
if(debug){
1282
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1283
direntry->d_name);
1284
}
1285
return 0;
1286
}
1287
1288
char *fullname = NULL;
1289
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1290
if(ret < 0){
1291
perror_plus("asprintf");
1292
return 0;
1293
}
1294
1295
ret = stat(fullname, &st);
1296
if(ret == -1){
1297
if(debug){
1298
perror_plus("Could not stat hook");
1299
}
1300
return 0;
1301
}
1302
if(not (S_ISREG(st.st_mode))){
1303
/* Not a regular file */
1304
if(debug){
1305
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1306
direntry->d_name);
1307
}
1308
return 0;
1309
}
1310
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1311
/* Not executable */
1312
if(debug){
1313
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1314
direntry->d_name);
1315
}
1316
return 0;
1317
}
1318
if(debug){
1319
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1320
direntry->d_name);
1321
}
1322
return 1;
1323
}
1324
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1326
mandos_context *mc){
1327
int ret;
1328
struct timespec now;
1329
struct timespec waited_time;
1330
intmax_t block_time;
1331
1332
while(true){
1333
if(mc->current_server == NULL){
1334
if (debug){
1335
fprintf_plus(stderr, "Wait until first server is found."
1336
" No timeout!\n");
1337
}
1338
ret = avahi_simple_poll_iterate(s, -1);
1339
} else {
1340
if (debug){
1341
fprintf_plus(stderr, "Check current_server if we should run"
1342
" it, or wait\n");
1343
}
1344
/* the current time */
1345
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1346
if(ret == -1){
1347
perror_plus("clock_gettime");
1348
return -1;
1349
}
1350
/* Calculating in ms how long time between now and server
1351
who we visted longest time ago. Now - last seen. */
1352
waited_time.tv_sec = (now.tv_sec
1353
- mc->current_server->last_seen.tv_sec);
1354
waited_time.tv_nsec = (now.tv_nsec
1355
- mc->current_server->last_seen.tv_nsec);
1356
/* total time is 10s/10,000ms.
1357
Converting to s from ms by dividing by 1,000,
1358
and ns to ms by dividing by 1,000,000. */
1359
block_time = ((retry_interval
1360
- ((intmax_t)waited_time.tv_sec * 1000))
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1362
1363
if (debug){
1364
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1365
block_time);
1366
}
1367
1368
if(block_time <= 0){
1369
ret = start_mandos_communication(mc->current_server->ip,
1370
mc->current_server->port,
1371
mc->current_server->if_index,
1372
mc->current_server->af, mc);
1373
if(ret == 0){
1374
avahi_simple_poll_quit(s);
1375
return 0;
1376
}
1377
ret = clock_gettime(CLOCK_MONOTONIC,
1378
&mc->current_server->last_seen);
1379
if(ret == -1){
1380
perror_plus("clock_gettime");
1381
return -1;
1382
}
1383
mc->current_server = mc->current_server->next;
1384
block_time = 0; /* Call avahi to find new Mandos
1385
servers, but don't block */
1386
}
1387
1388
ret = avahi_simple_poll_iterate(s, (int)block_time);
1389
}
1390
if(ret != 0){
1391
if (ret > 0 or errno != EINTR){
1392
return (ret != 1) ? ret : 0;
1393
}
1394
}
1395
}
1396
}
1397
1398
/* Set effective uid to 0, return errno */
1399
error_t raise_privileges(void){
1400
error_t old_errno = errno;
1401
error_t ret_errno = 0;
1402
if(seteuid(0) == -1){
1403
ret_errno = errno;
1404
perror_plus("seteuid");
1405
}
1406
errno = old_errno;
1407
return ret_errno;
1408
}
1409
1410
/* Set effective and real user ID to 0. Return errno. */
1411
error_t raise_privileges_permanently(void){
1412
error_t old_errno = errno;
1413
error_t ret_errno = raise_privileges();
1414
if(ret_errno != 0){
1415
errno = old_errno;
1416
return ret_errno;
1417
}
1418
if(setuid(0) == -1){
1419
ret_errno = errno;
1420
perror_plus("seteuid");
1421
}
1422
errno = old_errno;
1423
return ret_errno;
1424
}
1425
1426
/* Set effective user ID to unprivileged saved user ID */
1427
error_t lower_privileges(void){
1428
error_t old_errno = errno;
1429
error_t ret_errno = 0;
1430
if(seteuid(uid) == -1){
1431
ret_errno = errno;
1432
perror_plus("seteuid");
1433
}
1434
errno = old_errno;
1435
return ret_errno;
1436
}
1437
1438
/* Lower privileges permanently */
1439
error_t lower_privileges_permanently(void){
1440
error_t old_errno = errno;
1441
error_t ret_errno = 0;
1442
if(setuid(uid) == -1){
1443
ret_errno = errno;
1444
perror_plus("setuid");
1445
}
1446
errno = old_errno;
1447
return ret_errno;
1448
}
1449
1450
bool run_network_hooks(const char *mode, const char *interface,
1451
const float delay){
1452
struct dirent **direntries;
1453
struct dirent *direntry;
1454
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1457
if(numhooks == -1){
1458
if(errno == ENOENT){
1459
if(debug){
1460
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1461
" found\n", hookdir);
1462
}
1463
} else {
1464
perror_plus("scandir");
1465
}
1466
} else {
1467
int devnull = open("/dev/null", O_RDONLY);
1468
for(int i = 0; i < numhooks; i++){
1469
direntry = direntries[i];
1470
char *fullname = NULL;
1471
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1472
if(ret < 0){
1473
perror_plus("asprintf");
1474
continue;
1475
}
1476
if(debug){
1477
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1478
direntry->d_name);
1479
}
1480
pid_t hook_pid = fork();
1481
if(hook_pid == 0){
1482
/* Child */
1483
/* Raise privileges */
1484
raise_privileges_permanently();
1485
/* Set group */
1486
errno = 0;
1487
ret = setgid(0);
1488
if(ret == -1){
1489
perror_plus("setgid");
1490
}
1491
/* Reset supplementary groups */
1492
errno = 0;
1493
ret = setgroups(0, NULL);
1494
if(ret == -1){
1495
perror_plus("setgroups");
1496
}
1497
dup2(devnull, STDIN_FILENO);
1498
close(devnull);
1499
dup2(STDERR_FILENO, STDOUT_FILENO);
1500
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("DEVICE", interface, 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
ret = setenv("MODE", mode, 1);
1516
if(ret == -1){
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
char *delaystring;
1521
ret = asprintf(&delaystring, "%f", delay);
1522
if(ret == -1){
1523
perror_plus("asprintf");
1524
_exit(EX_OSERR);
1525
}
1526
ret = setenv("DELAY", delaystring, 1);
1527
if(ret == -1){
1528
free(delaystring);
1529
perror_plus("setenv");
1530
_exit(EX_OSERR);
1531
}
1532
free(delaystring);
1533
if(connect_to != NULL){
1534
ret = setenv("CONNECT", connect_to, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
}
1540
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1541
perror_plus("execl");
1542
_exit(EXIT_FAILURE);
1543
}
1544
} else {
1545
int status;
1546
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1547
perror_plus("waitpid");
1548
free(fullname);
1549
continue;
1550
}
1551
if(WIFEXITED(status)){
1552
if(WEXITSTATUS(status) != 0){
1553
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1554
" with status %d\n", direntry->d_name,
1555
WEXITSTATUS(status));
1556
free(fullname);
1557
continue;
1558
}
1559
} else if(WIFSIGNALED(status)){
1560
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1561
" signal %d\n", direntry->d_name,
1562
WTERMSIG(status));
1563
free(fullname);
1564
continue;
1565
} else {
1566
fprintf_plus(stderr, "Warning: network hook \"%s\""
1567
" crashed\n", direntry->d_name);
1568
free(fullname);
1569
continue;
1570
}
1571
}
1572
free(fullname);
1573
if(debug){
1574
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1575
direntry->d_name);
1576
}
1577
}
1578
close(devnull);
1579
}
1580
return true;
1581
}
1582
1583
error_t bring_up_interface(const char *const interface,
1584
const float delay){
1585
int sd = -1;
1586
error_t old_errno = errno;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1589
struct ifreq network;
1590
unsigned int if_index = if_nametoindex(interface);
1591
if(if_index == 0){
1592
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1593
errno = old_errno;
1594
return ENXIO;
1595
}
1596
1597
if(quit_now){
1598
errno = old_errno;
1599
return EINTR;
1600
}
1601
1602
if(not interface_is_up(interface)){
1603
if(not get_flags(interface, &network) and debug){
1604
ret_errno = errno;
1605
fprintf_plus(stderr, "Failed to get flags for interface "
1606
"\"%s\"\n", interface);
1607
return ret_errno;
1608
}
1609
network.ifr_flags |= IFF_UP;
1610
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1613
ret_errno = errno;
1614
perror_plus("socket");
1615
errno = old_errno;
1616
return ret_errno;
1617
}
1618
1619
if(quit_now){
1620
close(sd);
1621
errno = old_errno;
1622
return EINTR;
1623
}
1624
1625
if(debug){
1626
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1627
interface);
1628
}
1629
1630
/* Raise priviliges */
1631
raise_privileges();
1632
1633
#ifdef __linux__
1634
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1635
messages about the network interface to mess up the prompt */
1636
int ret_linux = klogctl(8, NULL, 5);
1637
bool restore_loglevel = true;
1638
if(ret_linux == -1){
1639
restore_loglevel = false;
1640
perror_plus("klogctl");
1641
}
1642
#endif /* __linux__ */
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1645
#ifdef __linux__
1646
if(restore_loglevel){
1647
ret_linux = klogctl(7, NULL, 0);
1648
if(ret_linux == -1){
1649
perror_plus("klogctl");
1650
}
1651
}
1652
#endif /* __linux__ */
1653
1654
/* Lower privileges */
1655
lower_privileges();
1656
1657
/* Close the socket */
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1659
if(ret == -1){
1660
perror_plus("close");
1661
}
1662
1663
if(ret_setflags == -1){
1664
errno = ret_errno;
1665
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1666
errno = old_errno;
1667
return ret_errno;
1668
}
1669
} else if(debug){
1670
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1671
interface);
1672
}
1673
1674
/* Sleep checking until interface is running.
1675
Check every 0.25s, up to total time of delay */
1676
for(int i=0; i < delay * 4; i++){
1677
if(interface_is_running(interface)){
1678
break;
1679
}
1680
struct timespec sleeptime = { .tv_nsec = 250000000 };
1681
ret = nanosleep(&sleeptime, NULL);
1682
if(ret == -1 and errno != EINTR){
1683
perror_plus("nanosleep");
1684
}
1685
}
1686
1687
errno = old_errno;
1688
return 0;
1689
}
1690
1691
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1693
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1696
struct ifreq network;
1697
unsigned int if_index = if_nametoindex(interface);
1698
if(if_index == 0){
1699
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1700
errno = old_errno;
1701
return ENXIO;
1702
}
1703
if(interface_is_up(interface)){
1704
if(not get_flags(interface, &network) and debug){
1705
ret_errno = errno;
1706
fprintf_plus(stderr, "Failed to get flags for interface "
1707
"\"%s\"\n", interface);
1708
return ret_errno;
1709
}
1710
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1711
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1714
ret_errno = errno;
1715
perror_plus("socket");
1716
errno = old_errno;
1717
return ret_errno;
1718
}
1719
1720
if(debug){
1721
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1722
interface);
1723
}
1724
1725
/* Raise priviliges */
1726
raise_privileges();
1727
1728
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1729
ret_errno = errno;
1730
1731
/* Lower privileges */
1732
lower_privileges();
1733
1734
/* Close the socket */
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
if(ret == -1){
1737
perror_plus("close");
1738
}
1739
1740
if(ret_setflags == -1){
1741
errno = ret_errno;
1742
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1743
errno = old_errno;
1744
return ret_errno;
1745
}
1746
} else if(debug){
1747
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
interface);
1749
}
1750
1751
errno = old_errno;
1752
return 0;
973
if(mc.simple_poll != NULL){
974
avahi_simple_poll_quit(mc.simple_poll);
975
}
976
errno = old_errno;
1753
977
}
1754
978
1755
979
int main(int argc, char *argv[]){
1756
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1757
.priority = "SECURE256:!CTYPE-X.509:"
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1759
980
AvahiSServiceBrowser *sb = NULL;
1760
error_t ret_errno;
981
int error;
1761
982
int ret;
1762
983
intmax_t tmpmax;
1763
984
char *tmp;
1764
985
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1767
char *interfaces_to_take_down = NULL;
1768
size_t interfaces_to_take_down_size = 0;
986
const char *interface = "eth0";
987
struct ifreq network;
988
int sd = -1;
989
bool take_down_interface = false;
990
uid_t uid;
991
gid_t gid;
992
char *connect_to = NULL;
1769
993
char tempdir[] = "/tmp/mandosXXXXXX";
1770
994
bool tempdir_created = false;
1771
995
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1772
996
const char *seckey = PATHDIR "/" SECKEY;
1773
997
const char *pubkey = PATHDIR "/" PUBKEY;
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1776
998
1777
999
bool gnutls_initialized = false;
1778
1000
bool gpgme_initialized = false;
1779
1001
float delay = 2.5f;
1780
double retry_interval = 10; /* 10s between trying a server and
1781
retrying the same server again */
1782
1002
1783
1003
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1784
1004
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1790
1010
errno = 0;
1791
1011
ret = setgid(gid);
1792
1012
if(ret == -1){
1793
perror_plus("setgid");
1013
perror("setgid");
1794
1014
}
1795
1015
1796
1016
/* Lower user privileges (temporarily) */
1797
1017
errno = 0;
1798
1018
ret = seteuid(uid);
1799
1019
if(ret == -1){
1800
perror_plus("seteuid");
1020
perror("seteuid");
1801
1021
}
1802
1022
1803
1023
if(quit_now){
1838
1058
.arg = "SECONDS",
1839
1059
.doc = "Maximum delay to wait for interface startup",
1840
1060
.group = 2 },
1841
{ .name = "retry", .key = 132,
1842
.arg = "SECONDS",
1843
.doc = "Retry interval used when denied by the Mandos server",
1844
.group = 2 },
1845
{ .name = "network-hook-dir", .key = 133,
1846
.arg = "DIR",
1847
.doc = "Directory where network hooks are located",
1848
.group = 2 },
1849
/*
1850
* These reproduce what we would get without ARGP_NO_HELP
1851
*/
1852
{ .name = "help", .key = '?',
1853
.doc = "Give this help list", .group = -1 },
1854
{ .name = "usage", .key = -3,
1855
.doc = "Give a short usage message", .group = -1 },
1856
{ .name = "version", .key = 'V',
1857
.doc = "Print program version", .group = -1 },
1858
1061
{ .name = NULL }
1859
1062
};
1860
1063
1861
1064
error_t parse_opt(int key, char *arg,
1862
1065
struct argp_state *state){
1863
errno = 0;
1864
1066
switch(key){
1865
1067
case 128: /* --debug */
1866
1068
debug = true;
1869
1071
connect_to = arg;
1870
1072
break;
1871
1073
case 'i': /* --interface */
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
1874
if(ret_errno != 0){
1875
argp_error(state, "%s", strerror(ret_errno));
1876
}
1074
interface = arg;
1877
1075
break;
1878
1076
case 's': /* --seckey */
1879
1077
seckey = arg;
1886
1084
tmpmax = strtoimax(arg, &tmp, 10);
1887
1085
if(errno != 0 or tmp == arg or *tmp != '\0'
1888
1086
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1889
argp_error(state, "Bad number of DH bits");
1087
fprintf(stderr, "Bad number of DH bits\n");
1088
exit(EXIT_FAILURE);
1890
1089
}
1891
1090
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1892
1091
break;
1897
1096
errno = 0;
1898
1097
delay = strtof(arg, &tmp);
1899
1098
if(errno != 0 or tmp == arg or *tmp != '\0'){
1900
argp_error(state, "Bad delay");
1901
}
1902
case 132: /* --retry */
1903
errno = 0;
1904
retry_interval = strtod(arg, &tmp);
1905
if(errno != 0 or tmp == arg or *tmp != '\0'
1906
or (retry_interval * 1000) > INT_MAX
1907
or retry_interval < 0){
1908
argp_error(state, "Bad retry interval");
1909
}
1910
break;
1911
case 133: /* --network-hook-dir */
1912
hookdir = arg;
1913
break;
1914
/*
1915
* These reproduce what we would get without ARGP_NO_HELP
1916
*/
1917
case '?': /* --help */
1918
argp_state_help(state, state->out_stream,
1919
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1920
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1921
case -3: /* --usage */
1922
argp_state_help(state, state->out_stream,
1923
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1924
case 'V': /* --version */
1925
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1926
exit(argp_err_exit_status);
1099
fprintf(stderr, "Bad delay\n");
1100
exit(EXIT_FAILURE);
1101
}
1102
break;
1103
case ARGP_KEY_ARG:
1104
argp_usage(state);
1105
case ARGP_KEY_END:
1927
1106
break;
1928
1107
default:
1929
1108
return ARGP_ERR_UNKNOWN;
1930
1109
}
1931
return errno;
1110
return 0;
1932
1111
}
1933
1112
1934
1113
struct argp argp = { .options = options, .parser = parse_opt,
1935
1114
.args_doc = "",
1936
1115
.doc = "Mandos client -- Get and decrypt"
1937
1116
" passwords from a Mandos server" };
1938
ret = argp_parse(&argp, argc, argv,
1939
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1940
switch(ret){
1941
case 0:
1942
break;
1943
case ENOMEM:
1944
default:
1945
errno = ret;
1946
perror_plus("argp_parse");
1947
exitcode = EX_OSERR;
1948
goto end;
1949
case EINVAL:
1950
exitcode = EX_USAGE;
1951
goto end;
1952
}
1953
}
1954
1955
{
1956
/* Work around Debian bug #633582:
1957
<http://bugs.debian.org/633582> */
1958
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
1961
struct stat st;
1962
1963
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1964
int seckey_fd = open(seckey, O_RDONLY);
1965
if(seckey_fd == -1){
1966
perror_plus("open");
1967
} else {
1968
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1969
if(ret == -1){
1970
perror_plus("fstat");
1971
} else {
1972
if(S_ISREG(st.st_mode)
1973
and st.st_uid == 0 and st.st_gid == 0){
1974
ret = fchown(seckey_fd, uid, gid);
1975
if(ret == -1){
1976
perror_plus("fchown");
1977
}
1978
}
1979
}
1980
TEMP_FAILURE_RETRY(close(seckey_fd));
1981
}
1982
}
1983
1984
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1985
int pubkey_fd = open(pubkey, O_RDONLY);
1986
if(pubkey_fd == -1){
1987
perror_plus("open");
1988
} else {
1989
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1990
if(ret == -1){
1991
perror_plus("fstat");
1992
} else {
1993
if(S_ISREG(st.st_mode)
1994
and st.st_uid == 0 and st.st_gid == 0){
1995
ret = fchown(pubkey_fd, uid, gid);
1996
if(ret == -1){
1997
perror_plus("fchown");
1998
}
1999
}
2000
}
2001
TEMP_FAILURE_RETRY(close(pubkey_fd));
2002
}
2003
}
2004
2005
/* Lower privileges */
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2010
}
2011
}
2012
}
2013
2014
/* Remove empty interface names */
2015
{
2016
char *interface = NULL;
2017
while((interface = argz_next(interfaces, interfaces_size,
2018
interface))){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2021
fprintf_plus(stderr, "Not using nonexisting interface"
2022
" \"%s\"\n", interface);
2023
}
2024
argz_delete(&interfaces, &interfaces_size, interface);
2025
interface = NULL;
2026
}
2027
}
2028
}
2029
2030
/* Run network hooks */
2031
{
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2035
if(interfaces_hooks == NULL){
2036
perror_plus("malloc");
2037
goto end;
2038
}
2039
memcpy(interfaces_hooks, interfaces, interfaces_size);
2040
interfaces_hooks_size = interfaces_size;
2041
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2042
(int)',');
2043
}
2044
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2045
interfaces_hooks : "", delay)){
1117
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1118
if(ret == ARGP_ERR_UNKNOWN){
1119
fprintf(stderr, "Unknown error while parsing arguments\n");
1120
exitcode = EXIT_FAILURE;
2046
1121
goto end;
2047
1122
}
2048
1123
}
2055
1130
from the signal handler */
2056
1131
/* Initialize the pseudo-RNG for Avahi */
2057
1132
srand((unsigned int) time(NULL));
2058
simple_poll = avahi_simple_poll_new();
2059
if(simple_poll == NULL){
2060
fprintf_plus(stderr,
2061
"Avahi: Failed to create simple poll object.\n");
2062
exitcode = EX_UNAVAILABLE;
1133
mc.simple_poll = avahi_simple_poll_new();
1134
if(mc.simple_poll == NULL){
1135
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1136
exitcode = EXIT_FAILURE;
2063
1137
goto end;
2064
1138
}
2065
1139
2066
1140
sigemptyset(&sigterm_action.sa_mask);
2067
1141
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2068
1142
if(ret == -1){
2069
perror_plus("sigaddset");
2070
exitcode = EX_OSERR;
1143
perror("sigaddset");
1144
exitcode = EXIT_FAILURE;
2071
1145
goto end;
2072
1146
}
2073
1147
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2074
1148
if(ret == -1){
2075
perror_plus("sigaddset");
2076
exitcode = EX_OSERR;
1149
perror("sigaddset");
1150
exitcode = EXIT_FAILURE;
2077
1151
goto end;
2078
1152
}
2079
1153
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2080
1154
if(ret == -1){
2081
perror_plus("sigaddset");
2082
exitcode = EX_OSERR;
1155
perror("sigaddset");
1156
exitcode = EXIT_FAILURE;
2083
1157
goto end;
2084
1158
}
2085
1159
/* Need to check if the handler is SIG_IGN before handling:
2088
1162
*/
2089
1163
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2090
1164
if(ret == -1){
2091
perror_plus("sigaction");
2092
return EX_OSERR;
1165
perror("sigaction");
1166
return EXIT_FAILURE;
2093
1167
}
2094
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
2095
1169
ret = sigaction(SIGINT, &sigterm_action, NULL);
2096
1170
if(ret == -1){
2097
perror_plus("sigaction");
2098
exitcode = EX_OSERR;
1171
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
2099
1173
goto end;
2100
1174
}
2101
1175
}
2102
1176
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2103
1177
if(ret == -1){
2104
perror_plus("sigaction");
2105
return EX_OSERR;
1178
perror("sigaction");
1179
return EXIT_FAILURE;
2106
1180
}
2107
1181
if(old_sigterm_action.sa_handler != SIG_IGN){
2108
1182
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2109
1183
if(ret == -1){
2110
perror_plus("sigaction");
2111
exitcode = EX_OSERR;
1184
perror("sigaction");
1185
exitcode = EXIT_FAILURE;
2112
1186
goto end;
2113
1187
}
2114
1188
}
2115
1189
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2116
1190
if(ret == -1){
2117
perror_plus("sigaction");
2118
return EX_OSERR;
1191
perror("sigaction");
1192
return EXIT_FAILURE;
2119
1193
}
2120
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
2121
1195
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2122
1196
if(ret == -1){
2123
perror_plus("sigaction");
2124
exitcode = EX_OSERR;
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
2125
1199
goto end;
2126
1200
}
2127
1201
}
2128
1202
2129
/* If no interfaces were specified, make a list */
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2132
/* Look for any good interfaces */
2133
ret = scandir(sys_class_net, &direntries, good_interface,
2134
alphasort);
2135
if(ret >= 1){
2136
/* Add all found interfaces to interfaces list */
2137
for(int i = 0; i < ret; ++i){
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2139
direntries[i]->d_name);
2140
if(ret_errno != 0){
2141
perror_plus("argz_add");
2142
continue;
2143
}
2144
if(debug){
2145
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2146
direntries[i]->d_name);
2147
}
2148
}
2149
free(direntries);
1203
/* If the interface is down, bring it up */
1204
if(interface[0] != '\0'){
1205
if_index = (AvahiIfIndex) if_nametoindex(interface);
1206
if(if_index == 0){
1207
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1208
exitcode = EXIT_FAILURE;
1209
goto end;
1210
}
1211
1212
if(quit_now){
1213
goto end;
1214
}
1215
1216
/* Re-raise priviliges */
1217
errno = 0;
1218
ret = seteuid(0);
1219
if(ret == -1){
1220
perror("seteuid");
1221
}
1222
1223
#ifdef __linux__
1224
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1225
messages to mess up the prompt */
1226
ret = klogctl(8, NULL, 5);
1227
bool restore_loglevel = true;
1228
if(ret == -1){
1229
restore_loglevel = false;
1230
perror("klogctl");
1231
}
1232
#endif /* __linux__ */
1233
1234
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1235
if(sd < 0){
1236
perror("socket");
1237
exitcode = EXIT_FAILURE;
1238
#ifdef __linux__
1239
if(restore_loglevel){
1240
ret = klogctl(7, NULL, 0);
1241
if(ret == -1){
1242
perror("klogctl");
1243
}
1244
}
1245
#endif /* __linux__ */
1246
/* Lower privileges */
1247
errno = 0;
1248
ret = seteuid(uid);
1249
if(ret == -1){
1250
perror("seteuid");
1251
}
1252
goto end;
1253
}
1254
strcpy(network.ifr_name, interface);
1255
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1256
if(ret == -1){
1257
perror("ioctl SIOCGIFFLAGS");
1258
#ifdef __linux__
1259
if(restore_loglevel){
1260
ret = klogctl(7, NULL, 0);
1261
if(ret == -1){
1262
perror("klogctl");
1263
}
1264
}
1265
#endif /* __linux__ */
1266
exitcode = EXIT_FAILURE;
1267
/* Lower privileges */
1268
errno = 0;
1269
ret = seteuid(uid);
1270
if(ret == -1){
1271
perror("seteuid");
1272
}
1273
goto end;
1274
}
1275
if((network.ifr_flags & IFF_UP) == 0){
1276
network.ifr_flags |= IFF_UP;
1277
take_down_interface = true;
1278
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1279
if(ret == -1){
1280
take_down_interface = false;
1281
perror("ioctl SIOCSIFFLAGS");
1282
exitcode = EXIT_FAILURE;
1283
#ifdef __linux__
1284
if(restore_loglevel){
1285
ret = klogctl(7, NULL, 0);
1286
if(ret == -1){
1287
perror("klogctl");
1288
}
1289
}
1290
#endif /* __linux__ */
1291
/* Lower privileges */
1292
errno = 0;
1293
ret = seteuid(uid);
1294
if(ret == -1){
1295
perror("seteuid");
1296
}
1297
goto end;
1298
}
1299
}
1300
/* sleep checking until interface is running */
1301
for(int i=0; i < delay * 4; i++){
1302
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1303
if(ret == -1){
1304
perror("ioctl SIOCGIFFLAGS");
1305
} else if(network.ifr_flags & IFF_RUNNING){
1306
break;
1307
}
1308
struct timespec sleeptime = { .tv_nsec = 250000000 };
1309
ret = nanosleep(&sleeptime, NULL);
1310
if(ret == -1 and errno != EINTR){
1311
perror("nanosleep");
1312
}
1313
}
1314
if(not take_down_interface){
1315
/* We won't need the socket anymore */
1316
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1317
if(ret == -1){
1318
perror("close");
1319
}
1320
}
1321
#ifdef __linux__
1322
if(restore_loglevel){
1323
/* Restores kernel loglevel to default */
1324
ret = klogctl(7, NULL, 0);
1325
if(ret == -1){
1326
perror("klogctl");
1327
}
1328
}
1329
#endif /* __linux__ */
1330
/* Lower privileges */
1331
errno = 0;
1332
if(take_down_interface){
1333
/* Lower privileges */
1334
ret = seteuid(uid);
1335
if(ret == -1){
1336
perror("seteuid");
1337
}
2150
1338
} else {
2151
free(direntries);
2152
fprintf_plus(stderr, "Could not find a network interface\n");
2153
exitcode = EXIT_FAILURE;
2154
goto end;
2155
}
2156
}
2157
2158
/* If we only got one interface, explicitly use only that one */
2159
if(argz_count(interfaces, interfaces_size) == 1){
2160
if(debug){
2161
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2162
interfaces);
2163
}
2164
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2165
}
2166
2167
/* Bring up interfaces which are down */
2168
if(not (argz_count(interfaces, interfaces_size) == 1
2169
and strcmp(interfaces, "none") == 0)){
2170
char *interface = NULL;
2171
while((interface = argz_next(interfaces, interfaces_size,
2172
interface))){
2173
bool interface_was_up = interface_is_up(interface);
2174
ret = bring_up_interface(interface, delay);
2175
if(not interface_was_up){
2176
if(ret != 0){
2177
errno = ret;
2178
perror_plus("Failed to bring up interface");
2179
} else {
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2183
}
1339
/* Lower privileges permanently */
1340
ret = setuid(uid);
1341
if(ret == -1){
1342
perror("setuid");
2184
1343
}
2185
1344
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2189
if(debug and (interfaces_to_take_down == NULL)){
2190
fprintf_plus(stderr, "No interfaces were brought up\n");
2191
}
2192
1345
}
2193
1346
2194
1347
if(quit_now){
2195
1348
goto end;
2196
1349
}
2197
1350
2198
ret = init_gnutls_global(pubkey, seckey, &mc);
1351
ret = init_gnutls_global(pubkey, seckey);
2199
1352
if(ret == -1){
2200
fprintf_plus(stderr, "init_gnutls_global failed\n");
2201
exitcode = EX_UNAVAILABLE;
1353
fprintf(stderr, "init_gnutls_global failed\n");
1354
exitcode = EXIT_FAILURE;
2202
1355
goto end;
2203
1356
} else {
2204
1357
gnutls_initialized = true;
2208
1361
goto end;
2209
1362
}
2210
1363
1364
tempdir_created = true;
2211
1365
if(mkdtemp(tempdir) == NULL){
2212
perror_plus("mkdtemp");
1366
tempdir_created = false;
1367
perror("mkdtemp");
2213
1368
goto end;
2214
1369
}
2215
tempdir_created = true;
2216
1370
2217
1371
if(quit_now){
2218
1372
goto end;
2219
1373
}
2220
1374
2221
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2222
fprintf_plus(stderr, "init_gpgme failed\n");
2223
exitcode = EX_UNAVAILABLE;
1375
if(not init_gpgme(pubkey, seckey, tempdir)){
1376
fprintf(stderr, "init_gpgme failed\n");
1377
exitcode = EXIT_FAILURE;
2224
1378
goto end;
2225
1379
} else {
2226
1380
gpgme_initialized = true;
2234
1388
/* Connect directly, do not use Zeroconf */
2235
1389
/* (Mainly meant for debugging) */
2236
1390
char *address = strrchr(connect_to, ':');
2237
2238
1391
if(address == NULL){
2239
fprintf_plus(stderr, "No colon in address\n");
2240
exitcode = EX_USAGE;
1392
fprintf(stderr, "No colon in address\n");
1393
exitcode = EXIT_FAILURE;
2241
1394
goto end;
2242
1395
}
2243
1396
2245
1398
goto end;
2246
1399
}
2247
1400
2248
in_port_t port;
1401
uint16_t port;
2249
1402
errno = 0;
2250
1403
tmpmax = strtoimax(address+1, &tmp, 10);
2251
1404
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2252
or tmpmax != (in_port_t)tmpmax){
2253
fprintf_plus(stderr, "Bad port number\n");
2254
exitcode = EX_USAGE;
1405
or tmpmax != (uint16_t)tmpmax){
1406
fprintf(stderr, "Bad port number\n");
1407
exitcode = EXIT_FAILURE;
2255
1408
goto end;
2256
1409
}
2257
1410
2259
1412
goto end;
2260
1413
}
2261
1414
2262
port = (in_port_t)tmpmax;
1415
port = (uint16_t)tmpmax;
2263
1416
*address = '\0';
1417
address = connect_to;
2264
1418
/* Colon in address indicates IPv6 */
2265
1419
int af;
2266
if(strchr(connect_to, ':') != NULL){
1420
if(strchr(address, ':') != NULL){
2267
1421
af = AF_INET6;
2268
/* Accept [] around IPv6 address - see RFC 5952 */
2269
if(connect_to[0] == '[' and address[-1] == ']')
2270
{
2271
connect_to++;
2272
address[-1] = '\0';
2273
}
2274
1422
} else {
2275
1423
af = AF_INET;
2276
1424
}
2277
address = connect_to;
2278
1425
2279
1426
if(quit_now){
2280
1427
goto end;
2281
1428
}
2282
1429
2283
while(not quit_now){
2284
ret = start_mandos_communication(address, port, if_index, af,
2285
&mc);
2286
if(quit_now or ret == 0){
2287
break;
2288
}
2289
if(debug){
2290
fprintf_plus(stderr, "Retrying in %d seconds\n",
2291
(int)retry_interval);
2292
}
2293
sleep((int)retry_interval);
2294
}
2295
2296
if (not quit_now){
1430
ret = start_mandos_communication(address, port, if_index, af);
1431
if(ret < 0){
1432
exitcode = EXIT_FAILURE;
1433
} else {
2297
1434
exitcode = EXIT_SUCCESS;
2298
1435
}
2299
2300
1436
goto end;
2301
1437
}
2302
1438
2314
1450
config.publish_domain = 0;
2315
1451
2316
1452
/* Allocate a new server */
2317
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2318
&config, NULL, NULL, &ret_errno);
1453
mc.server = avahi_server_new(avahi_simple_poll_get
1454
(mc.simple_poll), &config, NULL,
1455
NULL, &error);
2319
1456
2320
1457
/* Free the Avahi configuration data */
2321
1458
avahi_server_config_free(&config);
2323
1460
2324
1461
/* Check if creating the Avahi server object succeeded */
2325
1462
if(mc.server == NULL){
2326
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2327
avahi_strerror(ret_errno));
2328
exitcode = EX_UNAVAILABLE;
1463
fprintf(stderr, "Failed to create Avahi server: %s\n",
1464
avahi_strerror(error));
1465
exitcode = EXIT_FAILURE;
2329
1466
goto end;
2330
1467
}
2331
1468
2336
1473
/* Create the Avahi service browser */
2337
1474
sb = avahi_s_service_browser_new(mc.server, if_index,
2338
1475
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2339
NULL, 0, browse_callback,
2340
(void *)&mc);
1476
NULL, 0, browse_callback, NULL);
2341
1477
if(sb == NULL){
2342
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2343
avahi_strerror(avahi_server_errno(mc.server)));
2344
exitcode = EX_UNAVAILABLE;
1478
fprintf(stderr, "Failed to create service browser: %s\n",
1479
avahi_strerror(avahi_server_errno(mc.server)));
1480
exitcode = EXIT_FAILURE;
2345
1481
goto end;
2346
1482
}
2347
1483
2352
1488
/* Run the main loop */
2353
1489
2354
1490
if(debug){
2355
fprintf_plus(stderr, "Starting Avahi loop search\n");
2356
}
2357
2358
ret = avahi_loop_with_timeout(simple_poll,
2359
(int)(retry_interval * 1000), &mc);
2360
if(debug){
2361
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2362
(ret == 0) ? "successfully" : "with error");
2363
}
1491
fprintf(stderr, "Starting Avahi loop search\n");
1492
}
1493
1494
avahi_simple_poll_loop(mc.simple_poll);
2364
1495
2365
1496
end:
2366
1497
2367
1498
if(debug){
2368
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1499
fprintf(stderr, "%s exiting\n", argv[0]);
2369
1500
}
2370
1501
2371
1502
/* Cleanup things */
2375
1506
if(mc.server != NULL)
2376
1507
avahi_server_free(mc.server);
2377
1508
2378
if(simple_poll != NULL)
2379
avahi_simple_poll_free(simple_poll);
1509
if(mc.simple_poll != NULL)
1510
avahi_simple_poll_free(mc.simple_poll);
2380
1511
2381
1512
if(gnutls_initialized){
2382
1513
gnutls_certificate_free_credentials(mc.cred);
2388
1519
gpgme_release(mc.ctx);
2389
1520
}
2390
1521
2391
/* Cleans up the circular linked list of Mandos servers the client
2392
has seen */
2393
if(mc.current_server != NULL){
2394
mc.current_server->prev->next = NULL;
2395
while(mc.current_server != NULL){
2396
server *next = mc.current_server->next;
2397
free(mc.current_server);
2398
mc.current_server = next;
1522
/* Take down the network interface */
1523
if(take_down_interface){
1524
/* Re-raise priviliges */
1525
errno = 0;
1526
ret = seteuid(0);
1527
if(ret == -1){
1528
perror("seteuid");
2399
1529
}
2400
}
2401
2402
/* Re-raise priviliges */
2403
{
2404
raise_privileges();
2405
2406
/* Run network hooks */
2407
run_network_hooks("stop", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
2409
2410
/* Take down the network interfaces which were brought up */
2411
{
2412
char *interface = NULL;
2413
while((interface=argz_next(interfaces_to_take_down,
2414
interfaces_to_take_down_size,
2415
interface))){
2416
ret_errno = take_down_interface(interface);
2417
if(ret_errno != 0){
2418
errno = ret_errno;
2419
perror_plus("Failed to take down interface");
1530
if(geteuid() == 0){
1531
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1532
if(ret == -1){
1533
perror("ioctl SIOCGIFFLAGS");
1534
} else if(network.ifr_flags & IFF_UP) {
1535
network.ifr_flags &= ~IFF_UP; /* clear flag */
1536
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1537
if(ret == -1){
1538
perror("ioctl SIOCSIFFLAGS");
2420
1539
}
2421
1540
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
1541
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1542
if(ret == -1){
1543
perror("close");
1544
}
1545
/* Lower privileges permanently */
1546
errno = 0;
1547
ret = setuid(uid);
1548
if(ret == -1){
1549
perror("setuid");
2425
1550
}
2426
1551
}
2427
2428
lower_privileges_permanently();
2429
1552
}
2430
1553
2431
free(interfaces_to_take_down);
2432
free(interfaces_hooks);
2433
2434
/* Removes the GPGME temp directory and all files inside */
1554
/* Removes the temp directory used by GPGME */
2435
1555
if(tempdir_created){
2436
struct dirent **direntries = NULL;
2437
struct dirent *direntry = NULL;
2438
int numentries = scandir(tempdir, &direntries, notdotentries,
2439
alphasort);
2440
if (numentries > 0){
2441
for(int i = 0; i < numentries; i++){
2442
direntry = direntries[i];
1556
DIR *d;
1557
struct dirent *direntry;
1558
d = opendir(tempdir);
1559
if(d == NULL){
1560
if(errno != ENOENT){
1561
perror("opendir");
1562
}
1563
} else {
1564
while(true){
1565
direntry = readdir(d);
1566
if(direntry == NULL){
1567
break;
1568
}
1569
/* Skip "." and ".." */
1570
if(direntry->d_name[0] == '.'
1571
and (direntry->d_name[1] == '\0'
1572
or (direntry->d_name[1] == '.'
1573
and direntry->d_name[2] == '\0'))){
1574
continue;
1575
}
2443
1576
char *fullname = NULL;
2444
1577
ret = asprintf(&fullname, "%s/%s", tempdir,
2445
1578
direntry->d_name);
2446
1579
if(ret < 0){
2447
perror_plus("asprintf");
1580
perror("asprintf");
2448
1581
continue;
2449
1582
}
2450
1583
ret = remove(fullname);
2451
1584
if(ret == -1){
2452
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2453
strerror(errno));
1585
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1586
strerror(errno));
2454
1587
}
2455
1588
free(fullname);
2456
1589
}
2457
}
2458
2459
/* need to clean even if 0 because man page doesn't specify */
2460
free(direntries);
2461
if (numentries == -1){
2462
perror_plus("scandir");
1590
closedir(d);
2463
1591
}
2464
1592
ret = rmdir(tempdir);
2465
1593
if(ret == -1 and errno != ENOENT){
2466
perror_plus("rmdir");
1594
perror("rmdir");
2467
1595
}
2468
1596
}
2469
1597
2470
1598
if(quit_now){
2471
1599
sigemptyset(&old_sigterm_action.sa_mask);
2472
1600
old_sigterm_action.sa_handler = SIG_DFL;
2473
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2474
&old_sigterm_action,
2475
NULL));
1601
ret = sigaction(signal_received, &old_sigterm_action, NULL);
2476
1602
if(ret == -1){
2477
perror_plus("sigaction");
2478
}
2479
do {
2480
ret = raise(signal_received);
2481
} while(ret != 0 and errno == EINTR);
2482
if(ret != 0){
2483
perror_plus("raise");
2484
abort();
2485
}
2486
TEMP_FAILURE_RETRY(pause());
1603
perror("sigaction");
1604
}
1605
raise(signal_received);
2487
1606
}
2488
1607
2489
1608
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0