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- Committer: Teddy Hogeborn
- Date: 2009-02-07 04:50:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
- 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() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
38
#endif
39
35
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
37
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
39
stdout, ferror(), sscanf(),
40
remove() */
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
52
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
50
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
57
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
56
struct in6_addr, inet_pton(),
57
connect() */
59
58
#include <fcntl.h> /* open() */
60
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
60
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
67
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
66
SIOCSIFFLAGS, if_indextoname(),
69
67
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
68
#include <netinet/in.h>
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <iso646.h> /* not, or, and */
70
getuid(), getgid(), setuid(),
71
setgid() */
72
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
79
75
argp_state, struct argp,
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
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
95
78
#ifdef __linux__
96
79
#include <sys/klog.h> /* klogctl() */
97
#endif /* __linux__ */
80
#endif
98
81
99
82
/* Avahi */
100
83
/* All Avahi types, constants and functions
114
97
init_gnutls_session(),
115
98
GNUTLS_* */
116
99
#include <gnutls/openpgp.h>
117
/* gnutls_certificate_set_openpgp_key_file(),
118
GNUTLS_OPENPGP_FMT_BASE64 */
100
/* gnutls_certificate_set_openpgp_key_file(),
101
GNUTLS_OPENPGP_FMT_BASE64 */
119
102
120
103
/* GPGME */
121
104
#include <gpgme.h> /* All GPGME types, constants and
129
112
#define PATHDIR "/conf/conf.d/mandos"
130
113
#define SECKEY "seckey.txt"
131
114
#define PUBKEY "pubkey.txt"
132
#define HOOKDIR "/lib/mandos/network-hooks.d"
133
115
134
116
bool debug = false;
135
117
static const char mandos_protocol_version[] = "1";
136
118
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;
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
154
120
155
121
/* Used for passing in values through the Avahi callback functions */
156
122
typedef struct {
123
AvahiSimplePoll *simple_poll;
157
124
AvahiServer *server;
158
125
gnutls_certificate_credentials_t cred;
159
126
unsigned int dh_bits;
160
127
gnutls_dh_params_t dh_params;
161
128
const char *priority;
162
129
gpgme_ctx_t ctx;
163
server *current_server;
164
130
} mandos_context;
165
131
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
}
190
191
132
/*
192
* Make additional room in "buffer" for at least BUFFER_SIZE more
193
* bytes. "buffer_capacity" is how much is currently allocated,
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "buffer_capacity" is how much is currently allocated,
194
135
* "buffer_length" is how much is already used.
195
136
*/
196
size_t incbuffer(char **buffer, size_t buffer_length,
197
size_t buffer_capacity){
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
size_t buffer_capacity){
198
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
199
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
141
if(buffer == NULL){
205
146
return buffer_capacity;
206
147
}
207
148
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
149
/*
246
150
* Initialize GPGME.
247
151
*/
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
250
155
gpgme_error_t rc;
251
156
gpgme_engine_info_t engine_info;
252
157
158
253
159
/*
254
160
* Helper function to insert pub and seckey to the engine keyring.
255
161
*/
256
162
bool import_key(const char *filename){
257
int ret;
258
163
int fd;
259
164
gpgme_data_t pgp_data;
260
165
261
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
262
167
if(fd == -1){
263
perror_plus("open");
168
perror("open");
264
169
return false;
265
170
}
266
171
267
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
268
173
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));
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
271
176
return false;
272
177
}
273
178
274
179
rc = gpgme_op_import(mc->ctx, pgp_data);
275
180
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
278
183
return false;
279
184
}
280
185
281
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
282
187
if(ret == -1){
283
perror_plus("close");
188
perror("close");
284
189
}
285
190
gpgme_data_release(pgp_data);
286
191
return true;
287
192
}
288
193
289
194
if(debug){
290
fprintf_plus(stderr, "Initializing GPGME\n");
195
fprintf(stderr, "Initialize gpgme\n");
291
196
}
292
197
293
198
/* Init GPGME */
294
199
gpgme_check_version(NULL);
295
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
296
201
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));
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
gpgme_strsource(rc), gpgme_strerror(rc));
299
204
return false;
300
205
}
301
206
302
/* Set GPGME home directory for the OpenPGP engine only */
207
/* Set GPGME home directory for the OpenPGP engine only */
303
208
rc = gpgme_get_engine_info(&engine_info);
304
209
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));
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
gpgme_strsource(rc), gpgme_strerror(rc));
307
212
return false;
308
213
}
309
214
while(engine_info != NULL){
315
220
engine_info = engine_info->next;
316
221
}
317
222
if(engine_info == NULL){
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
320
224
return false;
321
225
}
322
226
323
227
/* Create new GPGME "context" */
324
228
rc = gpgme_new(&(mc->ctx));
325
229
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));
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
329
232
return false;
330
233
}
331
234
333
236
return false;
334
237
}
335
238
336
return true;
239
return true;
337
240
}
338
241
339
242
/*
340
243
* Decrypt OpenPGP data.
341
244
* Returns -1 on error
342
245
*/
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
344
248
size_t crypto_size,
345
char **plaintext,
346
mandos_context *mc){
249
char **plaintext){
347
250
gpgme_data_t dh_crypto, dh_plain;
348
251
gpgme_error_t rc;
349
252
ssize_t ret;
351
254
ssize_t plaintext_length = 0;
352
255
353
256
if(debug){
354
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
355
258
}
356
259
357
260
/* Create new GPGME data buffer from memory cryptotext */
358
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
359
262
0);
360
263
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));
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
gpgme_strsource(rc), gpgme_strerror(rc));
363
266
return -1;
364
267
}
365
268
366
269
/* Create new empty GPGME data buffer for the plaintext */
367
270
rc = gpgme_data_new(&dh_plain);
368
271
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));
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
372
274
gpgme_data_release(dh_crypto);
373
275
return -1;
374
276
}
377
279
data buffer */
378
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
379
281
if(rc != GPG_ERR_NO_ERROR){
380
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
381
gpgme_strsource(rc), gpgme_strerror(rc));
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
382
284
plaintext_length = -1;
383
285
if(debug){
384
286
gpgme_decrypt_result_t result;
385
287
result = gpgme_op_decrypt_result(mc->ctx);
386
288
if(result == NULL){
387
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
388
290
} 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);
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
393
295
if(result->file_name != NULL){
394
fprintf_plus(stderr, "File name: %s\n", result->file_name);
296
fprintf(stderr, "File name: %s\n", result->file_name);
395
297
}
396
298
gpgme_recipient_t recipient;
397
299
recipient = result->recipients;
398
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");
406
recipient = recipient->next;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
407
310
}
408
311
}
409
312
}
411
314
}
412
315
413
316
if(debug){
414
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
317
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
415
318
}
416
319
417
320
/* Seek back to the beginning of the GPGME plaintext data buffer */
418
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
419
perror_plus("gpgme_data_seek");
322
perror("gpgme_data_seek");
420
323
plaintext_length = -1;
421
324
goto decrypt_end;
422
325
}
423
326
424
327
*plaintext = NULL;
425
328
while(true){
426
plaintext_capacity = incbuffer(plaintext,
427
(size_t)plaintext_length,
428
plaintext_capacity);
329
plaintext_capacity = adjustbuffer(plaintext,
330
(size_t)plaintext_length,
331
plaintext_capacity);
429
332
if(plaintext_capacity == 0){
430
perror_plus("incbuffer");
431
plaintext_length = -1;
432
goto decrypt_end;
333
perror("adjustbuffer");
334
plaintext_length = -1;
335
goto decrypt_end;
433
336
}
434
337
435
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
440
343
break;
441
344
}
442
345
if(ret < 0){
443
perror_plus("gpgme_data_read");
346
perror("gpgme_data_read");
444
347
plaintext_length = -1;
445
348
goto decrypt_end;
446
349
}
448
351
}
449
352
450
353
if(debug){
451
fprintf_plus(stderr, "Decrypted password is: ");
354
fprintf(stderr, "Decrypted password is: ");
452
355
for(ssize_t i = 0; i < plaintext_length; i++){
453
356
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
454
357
}
466
369
}
467
370
468
371
static const char * safer_gnutls_strerror(int value){
469
const char *ret = gnutls_strerror(value);
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
470
374
if(ret == NULL)
471
375
ret = "(unknown)";
472
376
return ret;
475
379
/* GnuTLS log function callback */
476
380
static void debuggnutls(__attribute__((unused)) int level,
477
381
const char* string){
478
fprintf_plus(stderr, "GnuTLS: %s", string);
382
fprintf(stderr, "GnuTLS: %s", string);
479
383
}
480
384
481
static int init_gnutls_global(const char *pubkeyfilename,
482
const char *seckeyfilename,
483
mandos_context *mc){
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
484
388
int ret;
485
389
486
390
if(debug){
487
fprintf_plus(stderr, "Initializing GnuTLS\n");
391
fprintf(stderr, "Initializing GnuTLS\n");
488
392
}
489
393
490
394
ret = gnutls_global_init();
491
395
if(ret != GNUTLS_E_SUCCESS){
492
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
493
safer_gnutls_strerror(ret));
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
494
398
return -1;
495
399
}
496
400
503
407
}
504
408
505
409
/* OpenPGP credentials */
506
ret = gnutls_certificate_allocate_credentials(&mc->cred);
410
gnutls_certificate_allocate_credentials(&mc->cred);
507
411
if(ret != GNUTLS_E_SUCCESS){
508
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
509
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
510
417
gnutls_global_deinit();
511
418
return -1;
512
419
}
513
420
514
421
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);
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
519
425
}
520
426
521
427
ret = gnutls_certificate_set_openpgp_key_file
522
428
(mc->cred, pubkeyfilename, seckeyfilename,
523
429
GNUTLS_OPENPGP_FMT_BASE64);
524
430
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));
431
fprintf(stderr,
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
435
safer_gnutls_strerror(ret));
530
436
goto globalfail;
531
437
}
532
438
533
439
/* GnuTLS server initialization */
534
440
ret = gnutls_dh_params_init(&mc->dh_params);
535
441
if(ret != GNUTLS_E_SUCCESS){
536
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
537
" initialization: %s\n",
538
safer_gnutls_strerror(ret));
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
539
444
goto globalfail;
540
445
}
541
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
542
447
if(ret != GNUTLS_E_SUCCESS){
543
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
544
safer_gnutls_strerror(ret));
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
545
450
goto globalfail;
546
451
}
547
452
557
462
return -1;
558
463
}
559
464
560
static int init_gnutls_session(gnutls_session_t *session,
561
mandos_context *mc){
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
562
467
int ret;
563
468
/* GnuTLS session creation */
564
do {
565
ret = gnutls_init(session, GNUTLS_SERVER);
566
if(quit_now){
567
return -1;
568
}
569
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
469
ret = gnutls_init(session, GNUTLS_SERVER);
570
470
if(ret != GNUTLS_E_SUCCESS){
571
fprintf_plus(stderr,
572
"Error in GnuTLS session initialization: %s\n",
573
safer_gnutls_strerror(ret));
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
safer_gnutls_strerror(ret));
574
473
}
575
474
576
475
{
577
476
const char *err;
578
do {
579
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
580
if(quit_now){
581
gnutls_deinit(*session);
582
return -1;
583
}
584
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
585
478
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));
479
fprintf(stderr, "Syntax error at: %s\n", err);
480
fprintf(stderr, "GnuTLS error: %s\n",
481
safer_gnutls_strerror(ret));
589
482
gnutls_deinit(*session);
590
483
return -1;
591
484
}
592
485
}
593
486
594
do {
595
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
596
mc->cred);
597
if(quit_now){
598
gnutls_deinit(*session);
599
return -1;
600
}
601
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
602
489
if(ret != GNUTLS_E_SUCCESS){
603
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
604
safer_gnutls_strerror(ret));
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
safer_gnutls_strerror(ret));
605
492
gnutls_deinit(*session);
606
493
return -1;
607
494
}
608
495
609
496
/* ignore client certificate if any. */
610
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
611
499
612
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
613
501
619
507
__attribute__((unused)) const char *txt){}
620
508
621
509
/* Called when a Mandos server is found */
622
static int start_mandos_communication(const char *ip, in_port_t port,
510
static int start_mandos_communication(const char *ip, uint16_t port,
623
511
AvahiIfIndex if_index,
624
int af, mandos_context *mc){
625
int ret, tcp_sd = -1;
512
mandos_context *mc){
513
int ret, tcp_sd;
626
514
ssize_t sret;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
631
516
char *buffer = NULL;
632
char *decrypted_buffer = NULL;
517
char *decrypted_buffer;
633
518
size_t buffer_length = 0;
634
519
size_t buffer_capacity = 0;
520
ssize_t decrypted_buffer_size;
635
521
size_t written;
636
int retval = -1;
522
int retval = 0;
523
char interface[IF_NAMESIZE];
637
524
gnutls_session_t session;
638
int pf; /* Protocol family */
639
640
errno = 0;
641
642
if(quit_now){
643
errno = EINTR;
644
return -1;
645
}
646
647
switch(af){
648
case AF_INET6:
649
pf = PF_INET6;
650
break;
651
case AF_INET:
652
pf = PF_INET;
653
break;
654
default:
655
fprintf_plus(stderr, "Bad address family: %d\n", af);
656
errno = EINVAL;
657
return -1;
658
}
659
660
ret = init_gnutls_session(&session, mc);
525
526
ret = init_gnutls_session(mc, &session);
661
527
if(ret != 0){
662
528
return -1;
663
529
}
664
530
665
531
if(debug){
666
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIuMAX "\n", ip, (uintmax_t)port);
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
668
534
}
669
535
670
tcp_sd = socket(pf, SOCK_STREAM, 0);
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
671
537
if(tcp_sd < 0){
672
int e = errno;
673
perror_plus("socket");
674
errno = e;
675
goto mandos_end;
538
perror("socket");
539
return -1;
676
540
}
677
541
678
if(quit_now){
679
errno = EINTR;
680
goto mandos_end;
542
if(debug){
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
perror("if_indextoname");
545
return -1;
546
}
547
fprintf(stderr, "Binding to interface %s\n", interface);
681
548
}
682
549
683
550
memset(&to, 0, sizeof(to));
684
if(af == AF_INET6){
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
687
} else { /* IPv4 */
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
690
}
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
691
555
if(ret < 0 ){
692
int e = errno;
693
perror_plus("inet_pton");
694
errno = e;
695
goto mandos_end;
556
perror("inet_pton");
557
return -1;
696
558
}
697
559
if(ret == 0){
698
int e = errno;
699
fprintf_plus(stderr, "Bad address: %s\n", ip);
700
errno = e;
701
goto mandos_end;
560
fprintf(stderr, "Bad address: %s\n", ip);
561
return -1;
702
562
}
703
if(af == AF_INET6){
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
708
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;
712
goto mandos_end;
713
}
714
/* Set the network interface number as scope */
715
to.in6.sin6_scope_id = (uint32_t)if_index;
716
}
717
} else {
718
to.in.sin_port = htons(port); /* Spurious warnings from
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
719
564
-Wconversion and
720
565
-Wunreachable-code */
721
}
722
566
723
if(quit_now){
724
errno = EINTR;
725
goto mandos_end;
726
}
567
to.in6.sin6_scope_id = (uint32_t)if_index;
727
568
728
569
if(debug){
729
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
730
char interface[IF_NAMESIZE];
731
if(if_indextoname((unsigned int)if_index, interface) == NULL){
732
perror_plus("if_indextoname");
733
} else {
734
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
735
"\n", ip, interface, (uintmax_t)port);
736
}
737
} else {
738
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
739
ip, (uintmax_t)port);
740
}
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
744
if(af == AF_INET6){
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
747
} else {
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
750
}
751
if(pcret == NULL){
752
perror_plus("inet_ntop");
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
572
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
sizeof(addrstr)) == NULL){
575
perror("inet_ntop");
753
576
} else {
754
577
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
578
fprintf(stderr, "Canonical address form: %s\n", addrstr);
756
579
}
757
580
}
758
581
}
759
582
760
if(quit_now){
761
errno = EINTR;
762
goto mandos_end;
763
}
764
765
if(af == AF_INET6){
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
767
} else {
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
769
}
583
ret = connect(tcp_sd, &to.in, sizeof(to));
770
584
if(ret < 0){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
772
int e = errno;
773
perror_plus("connect");
774
errno = e;
775
}
776
goto mandos_end;
777
}
778
779
if(quit_now){
780
errno = EINTR;
781
goto mandos_end;
585
perror("connect");
586
return -1;
782
587
}
783
588
784
589
const char *out = mandos_protocol_version;
786
591
while(true){
787
592
size_t out_size = strlen(out);
788
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
789
out_size - written));
594
out_size - written));
790
595
if(ret == -1){
791
int e = errno;
792
perror_plus("write");
793
errno = e;
596
perror("write");
597
retval = -1;
794
598
goto mandos_end;
795
599
}
796
600
written += (size_t)ret;
804
608
break;
805
609
}
806
610
}
807
808
if(quit_now){
809
errno = EINTR;
810
goto mandos_end;
811
}
812
611
}
813
612
814
613
if(debug){
815
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
816
}
817
818
if(quit_now){
819
errno = EINTR;
820
goto mandos_end;
821
}
822
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);
828
829
if(quit_now){
830
errno = EINTR;
831
goto mandos_end;
832
}
833
834
do {
614
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
}
616
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
619
do{
835
620
ret = gnutls_handshake(session);
836
if(quit_now){
837
errno = EINTR;
838
goto mandos_end;
839
}
840
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
841
622
842
623
if(ret != GNUTLS_E_SUCCESS){
843
624
if(debug){
844
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
625
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
845
626
gnutls_perror(ret);
846
627
}
847
errno = EPROTO;
628
retval = -1;
848
629
goto mandos_end;
849
630
}
850
631
851
632
/* Read OpenPGP packet that contains the wanted password */
852
633
853
634
if(debug){
854
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
855
" %s\n", ip);
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
636
ip);
856
637
}
857
638
858
639
while(true){
859
860
if(quit_now){
861
errno = EINTR;
862
goto mandos_end;
863
}
864
865
buffer_capacity = incbuffer(&buffer, buffer_length,
866
buffer_capacity);
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
641
buffer_capacity);
867
642
if(buffer_capacity == 0){
868
int e = errno;
869
perror_plus("incbuffer");
870
errno = e;
871
goto mandos_end;
872
}
873
874
if(quit_now){
875
errno = EINTR;
643
perror("adjustbuffer");
644
retval = -1;
876
645
goto mandos_end;
877
646
}
878
647
887
656
case GNUTLS_E_AGAIN:
888
657
break;
889
658
case GNUTLS_E_REHANDSHAKE:
890
do {
659
do{
891
660
ret = gnutls_handshake(session);
892
893
if(quit_now){
894
errno = EINTR;
895
goto mandos_end;
896
}
897
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
898
662
if(ret < 0){
899
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
900
"***\n");
663
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
901
664
gnutls_perror(ret);
902
errno = EPROTO;
665
retval = -1;
903
666
goto mandos_end;
904
667
}
905
668
break;
906
669
default:
907
fprintf_plus(stderr, "Unknown error while reading data from"
908
" encrypted session with Mandos server\n");
670
fprintf(stderr, "Unknown error while reading data from"
671
" encrypted session with Mandos server\n");
672
retval = -1;
909
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
910
errno = EIO;
911
674
goto mandos_end;
912
675
}
913
676
} else {
916
679
}
917
680
918
681
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);
682
fprintf(stderr, "Closing TLS session\n");
683
}
684
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
934
686
935
687
if(buffer_length > 0){
936
ssize_t decrypted_buffer_size;
937
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
938
&decrypted_buffer, mc);
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
689
buffer_length,
690
&decrypted_buffer);
939
691
if(decrypted_buffer_size >= 0){
940
941
692
written = 0;
942
693
while(written < (size_t) decrypted_buffer_size){
943
if(quit_now){
944
errno = EINTR;
945
goto mandos_end;
946
}
947
948
694
ret = (int)fwrite(decrypted_buffer + written, 1,
949
695
(size_t)decrypted_buffer_size - written,
950
696
stdout);
951
697
if(ret == 0 and ferror(stdout)){
952
int e = errno;
953
698
if(debug){
954
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
955
strerror(errno));
699
fprintf(stderr, "Error writing encrypted data: %s\n",
700
strerror(errno));
956
701
}
957
errno = e;
958
goto mandos_end;
702
retval = -1;
703
break;
959
704
}
960
705
written += (size_t)ret;
961
706
}
962
retval = 0;
707
free(decrypted_buffer);
708
} else {
709
retval = -1;
963
710
}
711
} else {
712
retval = -1;
964
713
}
965
714
966
715
/* Shutdown procedure */
967
716
968
717
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
}
718
free(buffer);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
988
722
}
723
gnutls_deinit(session);
989
724
return retval;
990
725
}
991
726
992
727
static void resolve_callback(AvahiSServiceResolver *r,
993
728
AvahiIfIndex interface,
994
AvahiProtocol proto,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
995
730
AvahiResolverEvent event,
996
731
const char *name,
997
732
const char *type,
1002
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
1003
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1004
739
flags,
1005
void* mc){
1006
if(r == NULL){
1007
return;
1008
}
740
void* userdata){
741
mandos_context *mc = userdata;
742
assert(r);
1009
743
1010
744
/* Called whenever a service has been resolved successfully or
1011
745
timed out */
1012
746
1013
if(quit_now){
1014
return;
1015
}
1016
1017
747
switch(event){
1018
748
default:
1019
749
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)));
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
751
" of type '%s' in domain '%s': %s\n", name, type, domain,
752
avahi_strerror(avahi_server_errno(mc->server)));
1025
753
break;
1026
754
1027
755
case AVAHI_RESOLVER_FOUND:
1029
757
char ip[AVAHI_ADDRESS_STR_MAX];
1030
758
avahi_address_snprint(ip, sizeof(ip), address);
1031
759
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);
760
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
1035
763
}
1036
int ret = start_mandos_communication(ip, (in_port_t)port,
1037
interface,
1038
avahi_proto_to_af(proto),
1039
mc);
764
int ret = start_mandos_communication(ip, port, interface, mc);
1040
765
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
}
766
avahi_simple_poll_quit(mc->simple_poll);
1049
767
}
1050
768
}
1051
769
}
1061
779
const char *domain,
1062
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1063
781
flags,
1064
void* mc){
1065
if(b == NULL){
1066
return;
1067
}
782
void* userdata){
783
mandos_context *mc = userdata;
784
assert(b);
1068
785
1069
786
/* Called whenever a new services becomes available on the LAN or
1070
787
is removed from the LAN */
1071
788
1072
if(quit_now){
1073
return;
1074
}
1075
1076
789
switch(event){
1077
790
default:
1078
791
case AVAHI_BROWSER_FAILURE:
1079
792
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);
793
fprintf(stderr, "(Avahi browser) %s\n",
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
1084
796
return;
1085
797
1086
798
case AVAHI_BROWSER_NEW:
1089
801
the callback function is called the Avahi server will free the
1090
802
resolver for us. */
1091
803
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)));
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
808
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
809
name, avahi_strerror(avahi_server_errno(mc->server)));
1100
810
break;
1101
811
1102
812
case AVAHI_BROWSER_REMOVE:
1105
815
case AVAHI_BROWSER_ALL_FOR_NOW:
1106
816
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1107
817
if(debug){
1108
fprintf_plus(stderr, "No Mandos server found, still"
1109
" searching...\n");
818
fprintf(stderr, "No Mandos server found, still searching...\n");
1110
819
}
1111
820
break;
1112
821
}
1113
822
}
1114
823
1115
/* Signal handler that stops main loop after SIGTERM */
1116
static void handle_sigterm(int sig){
1117
if(quit_now){
1118
return;
1119
}
1120
quit_now = 1;
1121
signal_received = sig;
1122
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;
1753
}
1754
1755
824
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
825
AvahiSServiceBrowser *sb = NULL;
1760
error_t ret_errno;
826
int error;
1761
827
int ret;
1762
828
intmax_t tmpmax;
1763
char *tmp;
829
int numchars;
1764
830
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;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
1769
837
char tempdir[] = "/tmp/mandosXXXXXX";
1770
838
bool tempdir_created = false;
1771
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1772
840
const char *seckey = PATHDIR "/" SECKEY;
1773
841
const char *pubkey = PATHDIR "/" PUBKEY;
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1776
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
1777
846
bool gnutls_initialized = false;
1778
847
bool gpgme_initialized = false;
1779
float delay = 2.5f;
1780
double retry_interval = 10; /* 10s between trying a server and
1781
retrying the same server again */
1782
1783
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1784
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1785
1786
uid = getuid();
1787
gid = getgid();
1788
1789
/* Lower any group privileges we might have, just to be safe */
1790
errno = 0;
1791
ret = setgid(gid);
1792
if(ret == -1){
1793
perror_plus("setgid");
1794
}
1795
1796
/* Lower user privileges (temporarily) */
1797
errno = 0;
1798
ret = seteuid(uid);
1799
if(ret == -1){
1800
perror_plus("seteuid");
1801
}
1802
1803
if(quit_now){
1804
goto end;
1805
}
848
double delay = 2.5;
1806
849
1807
850
{
1808
851
struct argp_option options[] = {
1814
857
.group = 1 },
1815
858
{ .name = "interface", .key = 'i',
1816
859
.arg = "NAME",
1817
.doc = "Network interface that will be used to search for"
1818
" Mandos servers",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
1819
862
.group = 1 },
1820
863
{ .name = "seckey", .key = 's',
1821
864
.arg = "FILE",
1838
881
.arg = "SECONDS",
1839
882
.doc = "Maximum delay to wait for interface startup",
1840
883
.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
884
{ .name = NULL }
1859
885
};
1860
886
1861
887
error_t parse_opt(int key, char *arg,
1862
888
struct argp_state *state){
1863
errno = 0;
1864
889
switch(key){
1865
890
case 128: /* --debug */
1866
891
debug = true;
1869
894
connect_to = arg;
1870
895
break;
1871
896
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
}
897
interface = arg;
1877
898
break;
1878
899
case 's': /* --seckey */
1879
900
seckey = arg;
1882
903
pubkey = arg;
1883
904
break;
1884
905
case 129: /* --dh-bits */
1885
errno = 0;
1886
tmpmax = strtoimax(arg, &tmp, 10);
1887
if(errno != 0 or tmp == arg or *tmp != '\0'
1888
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1889
argp_error(state, "Bad number of DH bits");
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
1890
911
}
1891
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1892
913
break;
1894
915
mc.priority = arg;
1895
916
break;
1896
917
case 131: /* --delay */
1897
errno = 0;
1898
delay = strtof(arg, &tmp);
1899
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);
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
1927
927
break;
1928
928
default:
1929
929
return ARGP_ERR_UNKNOWN;
1930
930
}
1931
return errno;
931
return 0;
1932
932
}
1933
933
1934
934
struct argp argp = { .options = options, .parser = parse_opt,
1935
935
.args_doc = "",
1936
936
.doc = "Mandos client -- Get and decrypt"
1937
937
" 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");
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
956
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
959
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
968
}
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
if(ret == -1){
972
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
if(ret == -1){
986
perror("ioctl SIOCSIFFLAGS");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
2037
994
goto end;
2038
995
}
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)){
2046
goto end;
2047
}
2048
}
2049
2050
if(not debug){
2051
avahi_set_log_function(empty_log);
2052
}
2053
2054
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2055
from the signal handler */
2056
/* Initialize the pseudo-RNG for Avahi */
2057
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;
2063
goto end;
2064
}
2065
2066
sigemptyset(&sigterm_action.sa_mask);
2067
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2068
if(ret == -1){
2069
perror_plus("sigaddset");
2070
exitcode = EX_OSERR;
2071
goto end;
2072
}
2073
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2074
if(ret == -1){
2075
perror_plus("sigaddset");
2076
exitcode = EX_OSERR;
2077
goto end;
2078
}
2079
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2080
if(ret == -1){
2081
perror_plus("sigaddset");
2082
exitcode = EX_OSERR;
2083
goto end;
2084
}
2085
/* Need to check if the handler is SIG_IGN before handling:
2086
| [[info:libc:Initial Signal Actions]] |
2087
| [[info:libc:Basic Signal Handling]] |
2088
*/
2089
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2090
if(ret == -1){
2091
perror_plus("sigaction");
2092
return EX_OSERR;
2093
}
2094
if(old_sigterm_action.sa_handler != SIG_IGN){
2095
ret = sigaction(SIGINT, &sigterm_action, NULL);
2096
if(ret == -1){
2097
perror_plus("sigaction");
2098
exitcode = EX_OSERR;
2099
goto end;
2100
}
2101
}
2102
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2103
if(ret == -1){
2104
perror_plus("sigaction");
2105
return EX_OSERR;
2106
}
2107
if(old_sigterm_action.sa_handler != SIG_IGN){
2108
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2109
if(ret == -1){
2110
perror_plus("sigaction");
2111
exitcode = EX_OSERR;
2112
goto end;
2113
}
2114
}
2115
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2116
if(ret == -1){
2117
perror_plus("sigaction");
2118
return EX_OSERR;
2119
}
2120
if(old_sigterm_action.sa_handler != SIG_IGN){
2121
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2122
if(ret == -1){
2123
perror_plus("sigaction");
2124
exitcode = EX_OSERR;
2125
goto end;
2126
}
2127
}
2128
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);
2150
} 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
}
2184
}
2185
}
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
}
2193
2194
if(quit_now){
2195
goto end;
2196
}
2197
2198
ret = init_gnutls_global(pubkey, seckey, &mc);
2199
if(ret == -1){
2200
fprintf_plus(stderr, "init_gnutls_global failed\n");
2201
exitcode = EX_UNAVAILABLE;
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
999
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1000
if(ret == -1){
1001
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
2202
1041
goto end;
2203
1042
} else {
2204
1043
gnutls_initialized = true;
2205
1044
}
2206
1045
2207
if(quit_now){
2208
goto end;
2209
}
2210
2211
1046
if(mkdtemp(tempdir) == NULL){
2212
perror_plus("mkdtemp");
1047
perror("mkdtemp");
2213
1048
goto end;
2214
1049
}
2215
1050
tempdir_created = true;
2216
1051
2217
if(quit_now){
2218
goto end;
2219
}
2220
2221
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2222
fprintf_plus(stderr, "init_gpgme failed\n");
2223
exitcode = EX_UNAVAILABLE;
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
2224
1055
goto end;
2225
1056
} else {
2226
1057
gpgme_initialized = true;
2227
1058
}
2228
1059
2229
if(quit_now){
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
2230
1064
goto end;
2231
1065
}
2232
1066
2234
1068
/* Connect directly, do not use Zeroconf */
2235
1069
/* (Mainly meant for debugging) */
2236
1070
char *address = strrchr(connect_to, ':');
2237
2238
1071
if(address == NULL){
2239
fprintf_plus(stderr, "No colon in address\n");
2240
exitcode = EX_USAGE;
2241
goto end;
2242
}
2243
2244
if(quit_now){
2245
goto end;
2246
}
2247
2248
in_port_t port;
2249
errno = 0;
2250
tmpmax = strtoimax(address+1, &tmp, 10);
2251
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;
2255
goto end;
2256
}
2257
2258
if(quit_now){
2259
goto end;
2260
}
2261
2262
port = (in_port_t)tmpmax;
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
2263
1085
*address = '\0';
2264
/* Colon in address indicates IPv6 */
2265
int af;
2266
if(strchr(connect_to, ':') != NULL){
2267
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
} else {
2275
af = AF_INET;
2276
}
2277
1086
address = connect_to;
2278
2279
if(quit_now){
2280
goto end;
2281
}
2282
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){
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
2297
1091
exitcode = EXIT_SUCCESS;
2298
1092
}
2299
2300
1093
goto end;
2301
1094
}
2302
1095
2303
if(quit_now){
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
2304
1108
goto end;
2305
1109
}
2306
1110
2314
1118
config.publish_domain = 0;
2315
1119
2316
1120
/* Allocate a new server */
2317
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2318
&config, NULL, NULL, &ret_errno);
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
2319
1124
2320
1125
/* Free the Avahi configuration data */
2321
1126
avahi_server_config_free(&config);
2323
1128
2324
1129
/* Check if creating the Avahi server object succeeded */
2325
1130
if(mc.server == NULL){
2326
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2327
avahi_strerror(ret_errno));
2328
exitcode = EX_UNAVAILABLE;
2329
goto end;
2330
}
2331
2332
if(quit_now){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
2333
1134
goto end;
2334
1135
}
2335
1136
2336
1137
/* Create the Avahi service browser */
2337
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
2338
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2339
NULL, 0, browse_callback,
2340
(void *)&mc);
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
2341
1141
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;
2345
goto end;
2346
}
2347
2348
if(quit_now){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
2349
1145
goto end;
2350
1146
}
2351
1147
2352
1148
/* Run the main loop */
2353
1149
2354
1150
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
}
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
2364
1155
2365
1156
end:
2366
1157
2367
1158
if(debug){
2368
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1159
fprintf(stderr, "%s exiting\n", argv[0]);
2369
1160
}
2370
1161
2371
1162
/* Cleanup things */
2375
1166
if(mc.server != NULL)
2376
1167
avahi_server_free(mc.server);
2377
1168
2378
if(simple_poll != NULL)
2379
avahi_simple_poll_free(simple_poll);
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
2380
1171
2381
1172
if(gnutls_initialized){
2382
1173
gnutls_certificate_free_credentials(mc.cred);
2388
1179
gpgme_release(mc.ctx);
2389
1180
}
2390
1181
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;
2399
}
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");
2420
}
2421
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
2425
}
2426
}
2427
2428
lower_privileges_permanently();
2429
}
2430
2431
free(interfaces_to_take_down);
2432
free(interfaces_hooks);
2433
2434
/* Removes the GPGME temp directory and all files inside */
1182
/* Removes the temp directory used by GPGME */
2435
1183
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];
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1189
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
2443
1204
char *fullname = NULL;
2444
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
2445
1206
direntry->d_name);
2446
1207
if(ret < 0){
2447
perror_plus("asprintf");
1208
perror("asprintf");
2448
1209
continue;
2449
1210
}
2450
1211
ret = remove(fullname);
2451
1212
if(ret == -1){
2452
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2453
strerror(errno));
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
2454
1215
}
2455
1216
free(fullname);
2456
1217
}
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");
1218
closedir(d);
2463
1219
}
2464
1220
ret = rmdir(tempdir);
2465
1221
if(ret == -1 and errno != ENOENT){
2466
perror_plus("rmdir");
2467
}
2468
}
2469
2470
if(quit_now){
2471
sigemptyset(&old_sigterm_action.sa_mask);
2472
old_sigterm_action.sa_handler = SIG_DFL;
2473
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2474
&old_sigterm_action,
2475
NULL));
2476
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());
1222
perror("rmdir");
1223
}
2487
1224
}
2488
1225
2489
1226
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0