To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandosclient.c
- browse files at revision 33
- compare with another revision
- download diff
- download tarball
- view history from revision 33
- Committer: Teddy Hogeborn
- Date: 2008-08-01 07:04:32 UTC
- Revision ID: teddy@fukt.bsnet.se-20080801070432-5t1q0ds0bjxojyoz
* plugins.d/plugbasedclient.c (main): Close the pipe fd after dup2:ing
it onto stdout.
it onto stdout.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos-client - get and decrypt data from a Mandos server
3
* Mandos client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
30
29
*/
31
30
32
31
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
32
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
33
#define _FILE_OFFSET_BITS 64
38
#endif
39
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
SIOCSIFFLAGS, if_indextoname(),
69
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
78
#include <argp.h> /* struct argp_option, error_t, struct
79
argp_state, struct argp,
80
argp_parse(), ARGP_KEY_ARG,
81
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 */
86
87
#ifdef __linux__
88
#include <sys/klog.h> /* klogctl() */
89
#endif /* __linux__ */
90
91
/* Avahi */
92
/* All Avahi types, constants and functions
93
Avahi*, avahi_*,
94
AVAHI_* */
34
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
95
41
#include <avahi-core/core.h>
96
42
#include <avahi-core/lookup.h>
97
43
#include <avahi-core/log.h>
99
45
#include <avahi-common/malloc.h>
100
46
#include <avahi-common/error.h>
101
47
102
/* GnuTLS */
103
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
104
functions:
105
gnutls_*
106
init_gnutls_session(),
107
GNUTLS_* */
108
#include <gnutls/openpgp.h>
109
/* gnutls_certificate_set_openpgp_key_file(),
110
GNUTLS_OPENPGP_FMT_BASE64 */
111
112
/* GPGME */
113
#include <gpgme.h> /* All GPGME types, constants and
114
functions:
115
gpgme_*
116
GPGME_PROTOCOL_OpenPGP,
117
GPG_ERR_NO_* */
48
//mandos client part
49
#include <sys/types.h> /* socket(), inet_pton() */
50
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
51
struct in6_addr, inet_pton() */
52
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
53
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
54
55
#include <unistd.h> /* close() */
56
#include <netinet/in.h>
57
#include <stdbool.h> /* true */
58
#include <string.h> /* memset */
59
#include <arpa/inet.h> /* inet_pton() */
60
#include <iso646.h> /* not */
61
62
// gpgme
63
#include <errno.h> /* perror() */
64
#include <gpgme.h>
65
66
// getopt long
67
#include <getopt.h>
118
68
119
69
#define BUFFER_SIZE 256
70
#define DH_BITS 1024
120
71
121
#define PATHDIR "/conf/conf.d/mandos"
122
#define SECKEY "seckey.txt"
123
#define PUBKEY "pubkey.txt"
72
const char *certdir = "/conf/conf.d/cryptkeyreq/";
73
const char *certfile = "openpgp-client.txt";
74
const char *certkey = "openpgp-client-key.txt";
124
75
125
76
bool debug = false;
126
static const char mandos_protocol_version[] = "1";
127
const char *argp_program_version = "mandos-client " VERSION;
128
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
129
77
130
/* Used for passing in values through the Avahi callback functions */
131
78
typedef struct {
132
AvahiSimplePoll *simple_poll;
133
AvahiServer *server;
79
gnutls_session_t session;
134
80
gnutls_certificate_credentials_t cred;
135
unsigned int dh_bits;
136
81
gnutls_dh_params_t dh_params;
137
const char *priority;
82
} encrypted_session;
83
84
85
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
86
char **new_packet, const char *homedir){
87
gpgme_data_t dh_crypto, dh_plain;
138
88
gpgme_ctx_t ctx;
139
} mandos_context;
140
141
/* global context so signal handler can reach it*/
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
143
.dh_bits = 1024, .priority = "SECURE256"
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
145
146
sig_atomic_t quit_now = 0;
147
int signal_received = 0;
148
149
/*
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
151
* bytes. "buffer_capacity" is how much is currently allocated,
152
* "buffer_length" is how much is already used.
153
*/
154
size_t incbuffer(char **buffer, size_t buffer_length,
155
size_t buffer_capacity){
156
if(buffer_length + BUFFER_SIZE > buffer_capacity){
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
158
if(buffer == NULL){
159
return 0;
160
}
161
buffer_capacity += BUFFER_SIZE;
162
}
163
return buffer_capacity;
164
}
165
166
/*
167
* Initialize GPGME.
168
*/
169
static bool init_gpgme(const char *seckey,
170
const char *pubkey, const char *tempdir){
171
89
gpgme_error_t rc;
90
ssize_t ret;
91
ssize_t new_packet_capacity = 0;
92
ssize_t new_packet_length = 0;
172
93
gpgme_engine_info_t engine_info;
173
174
175
/*
176
* Helper function to insert pub and seckey to the engine keyring.
177
*/
178
bool import_key(const char *filename){
179
int ret;
180
int fd;
181
gpgme_data_t pgp_data;
182
183
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
184
if(fd == -1){
185
perror("open");
186
return false;
187
}
188
189
rc = gpgme_data_new_from_fd(&pgp_data, fd);
190
if(rc != GPG_ERR_NO_ERROR){
191
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
192
gpgme_strsource(rc), gpgme_strerror(rc));
193
return false;
194
}
195
196
rc = gpgme_op_import(mc.ctx, pgp_data);
197
if(rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
202
203
ret = (int)TEMP_FAILURE_RETRY(close(fd));
204
if(ret == -1){
205
perror("close");
206
}
207
gpgme_data_release(pgp_data);
208
return true;
209
}
210
211
if(debug){
212
fprintf(stderr, "Initializing GPGME\n");
94
95
if (debug){
96
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
213
97
}
214
98
215
99
/* Init GPGME */
216
100
gpgme_check_version(NULL);
217
101
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
218
if(rc != GPG_ERR_NO_ERROR){
102
if (rc != GPG_ERR_NO_ERROR){
219
103
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
220
104
gpgme_strsource(rc), gpgme_strerror(rc));
221
return false;
105
return -1;
222
106
}
223
107
224
/* Set GPGME home directory for the OpenPGP engine only */
225
rc = gpgme_get_engine_info(&engine_info);
226
if(rc != GPG_ERR_NO_ERROR){
108
/* Set GPGME home directory */
109
rc = gpgme_get_engine_info (&engine_info);
110
if (rc != GPG_ERR_NO_ERROR){
227
111
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
228
112
gpgme_strsource(rc), gpgme_strerror(rc));
229
return false;
113
return -1;
230
114
}
231
115
while(engine_info != NULL){
232
116
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
233
117
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
234
engine_info->file_name, tempdir);
118
engine_info->file_name, homedir);
235
119
break;
236
120
}
237
121
engine_info = engine_info->next;
238
122
}
239
123
if(engine_info == NULL){
240
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
241
return false;
242
}
243
244
/* Create new GPGME "context" */
245
rc = gpgme_new(&(mc.ctx));
246
if(rc != GPG_ERR_NO_ERROR){
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
gpgme_strsource(rc), gpgme_strerror(rc));
249
return false;
250
}
251
252
if(not import_key(pubkey) or not import_key(seckey)){
253
return false;
254
}
255
256
return true;
257
}
258
259
/*
260
* Decrypt OpenPGP data.
261
* Returns -1 on error
262
*/
263
static ssize_t pgp_packet_decrypt(const char *cryptotext,
264
size_t crypto_size,
265
char **plaintext){
266
gpgme_data_t dh_crypto, dh_plain;
267
gpgme_error_t rc;
268
ssize_t ret;
269
size_t plaintext_capacity = 0;
270
ssize_t plaintext_length = 0;
271
272
if(debug){
273
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
274
}
275
276
/* Create new GPGME data buffer from memory cryptotext */
277
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
278
0);
279
if(rc != GPG_ERR_NO_ERROR){
124
fprintf(stderr, "Could not set home dir to %s\n", homedir);
125
return -1;
126
}
127
128
/* Create new GPGME data buffer from packet buffer */
129
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
130
if (rc != GPG_ERR_NO_ERROR){
280
131
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
281
132
gpgme_strsource(rc), gpgme_strerror(rc));
282
133
return -1;
284
135
285
136
/* Create new empty GPGME data buffer for the plaintext */
286
137
rc = gpgme_data_new(&dh_plain);
287
if(rc != GPG_ERR_NO_ERROR){
138
if (rc != GPG_ERR_NO_ERROR){
288
139
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
289
140
gpgme_strsource(rc), gpgme_strerror(rc));
290
gpgme_data_release(dh_crypto);
291
return -1;
292
}
293
294
/* Decrypt data from the cryptotext data buffer to the plaintext
295
data buffer */
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
297
if(rc != GPG_ERR_NO_ERROR){
141
return -1;
142
}
143
144
/* Create new GPGME "context" */
145
rc = gpgme_new(&ctx);
146
if (rc != GPG_ERR_NO_ERROR){
147
fprintf(stderr, "bad gpgme_new: %s: %s\n",
148
gpgme_strsource(rc), gpgme_strerror(rc));
149
return -1;
150
}
151
152
/* Decrypt data from the FILE pointer to the plaintext data
153
buffer */
154
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
155
if (rc != GPG_ERR_NO_ERROR){
298
156
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
299
157
gpgme_strsource(rc), gpgme_strerror(rc));
300
plaintext_length = -1;
301
if(debug){
302
gpgme_decrypt_result_t result;
303
result = gpgme_op_decrypt_result(mc.ctx);
304
if(result == NULL){
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
306
} else {
307
fprintf(stderr, "Unsupported algorithm: %s\n",
308
result->unsupported_algorithm);
309
fprintf(stderr, "Wrong key usage: %u\n",
310
result->wrong_key_usage);
311
if(result->file_name != NULL){
312
fprintf(stderr, "File name: %s\n", result->file_name);
313
}
314
gpgme_recipient_t recipient;
315
recipient = result->recipients;
158
return -1;
159
}
160
161
if(debug){
162
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
163
}
164
165
if (debug){
166
gpgme_decrypt_result_t result;
167
result = gpgme_op_decrypt_result(ctx);
168
if (result == NULL){
169
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
170
} else {
171
fprintf(stderr, "Unsupported algorithm: %s\n",
172
result->unsupported_algorithm);
173
fprintf(stderr, "Wrong key usage: %d\n",
174
result->wrong_key_usage);
175
if(result->file_name != NULL){
176
fprintf(stderr, "File name: %s\n", result->file_name);
177
}
178
gpgme_recipient_t recipient;
179
recipient = result->recipients;
180
if(recipient){
316
181
while(recipient != NULL){
317
182
fprintf(stderr, "Public key algorithm: %s\n",
318
183
gpgme_pubkey_algo_name(recipient->pubkey_algo));
324
189
}
325
190
}
326
191
}
327
goto decrypt_end;
328
192
}
329
193
330
if(debug){
331
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
332
}
194
/* Delete the GPGME FILE pointer cryptotext data buffer */
195
gpgme_data_release(dh_crypto);
333
196
334
197
/* Seek back to the beginning of the GPGME plaintext data buffer */
335
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
336
perror("gpgme_data_seek");
337
plaintext_length = -1;
338
goto decrypt_end;
198
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
199
perror("pgpme_data_seek");
339
200
}
340
201
341
*plaintext = NULL;
202
*new_packet = 0;
342
203
while(true){
343
plaintext_capacity = incbuffer(plaintext,
344
(size_t)plaintext_length,
345
plaintext_capacity);
346
if(plaintext_capacity == 0){
347
perror("incbuffer");
348
plaintext_length = -1;
349
goto decrypt_end;
204
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
205
*new_packet = realloc(*new_packet,
206
(unsigned int)new_packet_capacity
207
+ BUFFER_SIZE);
208
if (*new_packet == NULL){
209
perror("realloc");
210
return -1;
211
}
212
new_packet_capacity += BUFFER_SIZE;
350
213
}
351
214
352
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
215
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
353
216
BUFFER_SIZE);
354
217
/* Print the data, if any */
355
if(ret == 0){
356
/* EOF */
218
if (ret == 0){
357
219
break;
358
220
}
359
221
if(ret < 0){
360
222
perror("gpgme_data_read");
361
plaintext_length = -1;
362
goto decrypt_end;
363
}
364
plaintext_length += ret;
365
}
366
367
if(debug){
368
fprintf(stderr, "Decrypted password is: ");
369
for(ssize_t i = 0; i < plaintext_length; i++){
370
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
371
}
372
fprintf(stderr, "\n");
373
}
374
375
decrypt_end:
376
377
/* Delete the GPGME cryptotext data buffer */
378
gpgme_data_release(dh_crypto);
223
return -1;
224
}
225
new_packet_length += ret;
226
}
227
228
/* FIXME: check characters before printing to screen so to not print
229
terminal control characters */
230
/* if(debug){ */
231
/* fprintf(stderr, "decrypted password is: "); */
232
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
233
/* fprintf(stderr, "\n"); */
234
/* } */
379
235
380
236
/* Delete the GPGME plaintext data buffer */
381
237
gpgme_data_release(dh_plain);
382
return plaintext_length;
238
return new_packet_length;
383
239
}
384
240
385
static const char * safer_gnutls_strerror(int value){
386
const char *ret = gnutls_strerror(value); /* Spurious warning from
387
-Wunreachable-code */
388
if(ret == NULL)
241
static const char * safer_gnutls_strerror (int value) {
242
const char *ret = gnutls_strerror (value);
243
if (ret == NULL)
389
244
ret = "(unknown)";
390
245
return ret;
391
246
}
392
247
393
/* GnuTLS log function callback */
394
static void debuggnutls(__attribute__((unused)) int level,
395
const char* string){
396
fprintf(stderr, "GnuTLS: %s", string);
248
void debuggnutls(__attribute__((unused)) int level,
249
const char* string){
250
fprintf(stderr, "%s", string);
397
251
}
398
252
399
static int init_gnutls_global(const char *pubkeyfilename,
400
const char *seckeyfilename){
253
int initgnutls(encrypted_session *es){
254
const char *err;
401
255
int ret;
402
256
403
257
if(debug){
404
258
fprintf(stderr, "Initializing GnuTLS\n");
405
259
}
406
407
ret = gnutls_global_init();
408
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS global_init: %s\n",
410
safer_gnutls_strerror(ret));
260
261
if ((ret = gnutls_global_init ())
262
!= GNUTLS_E_SUCCESS) {
263
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
411
264
return -1;
412
265
}
413
414
if(debug){
415
/* "Use a log level over 10 to enable all debugging options."
416
* - GnuTLS manual
417
*/
266
267
if (debug){
418
268
gnutls_global_set_log_level(11);
419
269
gnutls_global_set_log_function(debuggnutls);
420
270
}
421
271
422
/* OpenPGP credentials */
423
gnutls_certificate_allocate_credentials(&mc.cred);
424
if(ret != GNUTLS_E_SUCCESS){
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
429
safer_gnutls_strerror(ret));
430
gnutls_global_deinit();
272
/* openpgp credentials */
273
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
274
!= GNUTLS_E_SUCCESS) {
275
fprintf (stderr, "memory error: %s\n",
276
safer_gnutls_strerror(ret));
431
277
return -1;
432
278
}
433
279
434
280
if(debug){
435
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
436
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
437
seckeyfilename);
281
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
282
" and keyfile %s as GnuTLS credentials\n", certfile,
283
certkey);
438
284
}
439
285
440
286
ret = gnutls_certificate_set_openpgp_key_file
441
(mc.cred, pubkeyfilename, seckeyfilename,
442
GNUTLS_OPENPGP_FMT_BASE64);
443
if(ret != GNUTLS_E_SUCCESS){
444
fprintf(stderr,
445
"Error[%d] while reading the OpenPGP key pair ('%s',"
446
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
447
fprintf(stderr, "The GnuTLS error is: %s\n",
448
safer_gnutls_strerror(ret));
449
goto globalfail;
450
}
451
452
/* GnuTLS server initialization */
453
ret = gnutls_dh_params_init(&mc.dh_params);
454
if(ret != GNUTLS_E_SUCCESS){
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
" %s\n", safer_gnutls_strerror(ret));
457
goto globalfail;
458
}
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
460
if(ret != GNUTLS_E_SUCCESS){
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
safer_gnutls_strerror(ret));
463
goto globalfail;
464
}
465
466
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
467
468
return 0;
469
470
globalfail:
471
472
gnutls_certificate_free_credentials(mc.cred);
473
gnutls_global_deinit();
474
gnutls_dh_params_deinit(mc.dh_params);
475
return -1;
476
}
477
478
static int init_gnutls_session(gnutls_session_t *session){
479
int ret;
480
/* GnuTLS session creation */
481
do {
482
ret = gnutls_init(session, GNUTLS_SERVER);
483
if(quit_now){
484
return -1;
485
}
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
if(ret != GNUTLS_E_SUCCESS){
287
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
288
if (ret != GNUTLS_E_SUCCESS) {
289
fprintf
290
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
291
" '%s')\n",
292
ret, certfile, certkey);
293
fprintf(stdout, "The Error is: %s\n",
294
safer_gnutls_strerror(ret));
295
return -1;
296
}
297
298
//GnuTLS server initialization
299
if ((ret = gnutls_dh_params_init (&es->dh_params))
300
!= GNUTLS_E_SUCCESS) {
301
fprintf (stderr, "Error in dh parameter initialization: %s\n",
302
safer_gnutls_strerror(ret));
303
return -1;
304
}
305
306
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
307
!= GNUTLS_E_SUCCESS) {
308
fprintf (stderr, "Error in prime generation: %s\n",
309
safer_gnutls_strerror(ret));
310
return -1;
311
}
312
313
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
314
315
// GnuTLS session creation
316
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
317
!= GNUTLS_E_SUCCESS){
488
318
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
319
safer_gnutls_strerror(ret));
490
320
}
491
321
492
{
493
const char *err;
494
do {
495
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
496
if(quit_now){
497
gnutls_deinit(*session);
498
return -1;
499
}
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
501
if(ret != GNUTLS_E_SUCCESS){
502
fprintf(stderr, "Syntax error at: %s\n", err);
503
fprintf(stderr, "GnuTLS error: %s\n",
504
safer_gnutls_strerror(ret));
505
gnutls_deinit(*session);
506
return -1;
507
}
322
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
323
!= GNUTLS_E_SUCCESS) {
324
fprintf(stderr, "Syntax error at: %s\n", err);
325
fprintf(stderr, "GnuTLS error: %s\n",
326
safer_gnutls_strerror(ret));
327
return -1;
508
328
}
509
329
510
do {
511
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
512
mc.cred);
513
if(quit_now){
514
gnutls_deinit(*session);
515
return -1;
516
}
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
518
if(ret != GNUTLS_E_SUCCESS){
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
330
if ((ret = gnutls_credentials_set
331
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
332
!= GNUTLS_E_SUCCESS) {
333
fprintf(stderr, "Error setting a credentials set: %s\n",
520
334
safer_gnutls_strerror(ret));
521
gnutls_deinit(*session);
522
335
return -1;
523
336
}
524
337
525
338
/* ignore client certificate if any. */
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
339
gnutls_certificate_server_set_request (es->session,
340
GNUTLS_CERT_IGNORE);
527
341
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
342
gnutls_dh_set_prime_bits (es->session, DH_BITS);
529
343
530
344
return 0;
531
345
}
532
346
533
/* Avahi log function callback */
534
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
535
__attribute__((unused)) const char *txt){}
347
void empty_log(__attribute__((unused)) AvahiLogLevel level,
348
__attribute__((unused)) const char *txt){}
536
349
537
/* Called when a Mandos server is found */
538
static int start_mandos_communication(const char *ip, uint16_t port,
539
AvahiIfIndex if_index,
540
int af){
541
int ret, tcp_sd = -1;
542
ssize_t sret;
543
union {
544
struct sockaddr_in in;
545
struct sockaddr_in6 in6;
546
} to;
350
int start_mandos_communication(const char *ip, uint16_t port,
351
AvahiIfIndex if_index){
352
int ret, tcp_sd;
353
struct sockaddr_in6 to;
354
encrypted_session es;
547
355
char *buffer = NULL;
548
char *decrypted_buffer = NULL;
356
char *decrypted_buffer;
549
357
size_t buffer_length = 0;
550
358
size_t buffer_capacity = 0;
551
size_t written;
552
int retval = -1;
553
gnutls_session_t session;
554
int pf; /* Protocol family */
555
556
if(quit_now){
557
return -1;
558
}
559
560
switch(af){
561
case AF_INET6:
562
pf = PF_INET6;
563
break;
564
case AF_INET:
565
pf = PF_INET;
566
break;
567
default:
568
fprintf(stderr, "Bad address family: %d\n", af);
569
return -1;
570
}
571
572
ret = init_gnutls_session(&session);
573
if(ret != 0){
574
return -1;
575
}
359
ssize_t decrypted_buffer_size;
360
size_t written = 0;
361
int retval = 0;
362
char interface[IF_NAMESIZE];
576
363
577
364
if(debug){
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
579
"\n", ip, port);
365
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
366
ip, port);
580
367
}
581
368
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
583
if(tcp_sd < 0){
369
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
370
if(tcp_sd < 0) {
584
371
perror("socket");
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
goto mandos_end;
590
}
591
592
memset(&to, 0, sizeof(to));
593
if(af == AF_INET6){
594
to.in6.sin6_family = (sa_family_t)af;
595
ret = inet_pton(af, ip, &to.in6.sin6_addr);
596
} else { /* IPv4 */
597
to.in.sin_family = (sa_family_t)af;
598
ret = inet_pton(af, ip, &to.in.sin_addr);
599
}
600
if(ret < 0 ){
372
return -1;
373
}
374
375
if(if_indextoname((unsigned int)if_index, interface) == NULL){
376
if(debug){
377
perror("if_indextoname");
378
}
379
return -1;
380
}
381
382
if(debug){
383
fprintf(stderr, "Binding to interface %s\n", interface);
384
}
385
386
memset(&to,0,sizeof(to)); /* Spurious warning */
387
to.sin6_family = AF_INET6;
388
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
389
if (ret < 0 ){
601
390
perror("inet_pton");
602
goto mandos_end;
603
}
391
return -1;
392
}
604
393
if(ret == 0){
605
394
fprintf(stderr, "Bad address: %s\n", ip);
606
goto mandos_end;
607
}
608
if(af == AF_INET6){
609
to.in6.sin6_port = htons(port); /* Spurious warnings from
610
-Wconversion and
611
-Wunreachable-code */
612
613
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
614
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
615
-Wunreachable-code*/
616
if(if_index == AVAHI_IF_UNSPEC){
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
619
goto mandos_end;
620
}
621
/* Set the network interface number as scope */
622
to.in6.sin6_scope_id = (uint32_t)if_index;
623
}
624
} else {
625
to.in.sin_port = htons(port); /* Spurious warnings from
626
-Wconversion and
627
-Wunreachable-code */
628
}
395
return -1;
396
}
397
to.sin6_port = htons(port); /* Spurious warning */
629
398
630
if(quit_now){
631
goto mandos_end;
632
}
399
to.sin6_scope_id = (uint32_t)if_index;
633
400
634
401
if(debug){
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
636
char interface[IF_NAMESIZE];
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
638
perror("if_indextoname");
639
} else {
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
642
}
643
} else {
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
646
}
647
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
648
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
649
const char *pcret;
650
if(af == AF_INET6){
651
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
652
sizeof(addrstr));
653
} else {
654
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
655
sizeof(addrstr));
656
}
657
if(pcret == NULL){
658
perror("inet_ntop");
659
} else {
660
if(strcmp(addrstr, ip) != 0){
661
fprintf(stderr, "Canonical address form: %s\n", addrstr);
662
}
663
}
664
}
665
666
if(quit_now){
667
goto mandos_end;
668
}
669
670
if(af == AF_INET6){
671
ret = connect(tcp_sd, &to.in6, sizeof(to));
672
} else {
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
674
}
675
if(ret < 0){
402
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
403
/* char addrstr[INET6_ADDRSTRLEN]; */
404
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
405
/* sizeof(addrstr)) == NULL){ */
406
/* perror("inet_ntop"); */
407
/* } else { */
408
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
409
/* addrstr, ntohs(to.sin6_port)); */
410
/* } */
411
}
412
413
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
414
if (ret < 0){
676
415
perror("connect");
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
682
}
683
684
const char *out = mandos_protocol_version;
685
written = 0;
686
while(true){
687
size_t out_size = strlen(out);
688
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
689
out_size - written));
690
if(ret == -1){
691
perror("write");
692
goto mandos_end;
693
}
694
written += (size_t)ret;
695
if(written < out_size){
696
continue;
697
} else {
698
if(out == mandos_protocol_version){
699
written = 0;
700
out = "\r\n";
701
} else {
702
break;
703
}
704
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
709
}
416
return -1;
417
}
418
419
ret = initgnutls (&es);
420
if (ret != 0){
421
retval = -1;
422
return -1;
423
}
424
425
gnutls_transport_set_ptr (es.session,
426
(gnutls_transport_ptr_t) tcp_sd);
710
427
711
428
if(debug){
712
429
fprintf(stderr, "Establishing TLS session with %s\n", ip);
713
430
}
714
431
715
if(quit_now){
716
goto mandos_end;
717
}
718
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
720
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
726
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
731
732
if(ret != GNUTLS_E_SUCCESS){
432
ret = gnutls_handshake (es.session);
433
434
if (ret != GNUTLS_E_SUCCESS){
733
435
if(debug){
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
735
gnutls_perror(ret);
436
fprintf(stderr, "\n*** Handshake failed ***\n");
437
gnutls_perror (ret);
736
438
}
737
goto mandos_end;
439
retval = -1;
440
goto exit;
738
441
}
739
442
740
/* Read OpenPGP packet that contains the wanted password */
443
//Retrieve OpenPGP packet that contains the wanted password
741
444
742
445
if(debug){
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
446
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
744
447
ip);
745
448
}
746
449
747
450
while(true){
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
753
buffer_capacity = incbuffer(&buffer, buffer_length,
754
buffer_capacity);
755
if(buffer_capacity == 0){
756
perror("incbuffer");
757
goto mandos_end;
758
}
759
760
if(quit_now){
761
goto mandos_end;
762
}
763
764
sret = gnutls_record_recv(session, buffer+buffer_length,
765
BUFFER_SIZE);
766
if(sret == 0){
451
if (buffer_length + BUFFER_SIZE > buffer_capacity){
452
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
453
if (buffer == NULL){
454
perror("realloc");
455
goto exit;
456
}
457
buffer_capacity += BUFFER_SIZE;
458
}
459
460
ret = gnutls_record_recv
461
(es.session, buffer+buffer_length, BUFFER_SIZE);
462
if (ret == 0){
767
463
break;
768
464
}
769
if(sret < 0){
770
switch(sret){
465
if (ret < 0){
466
switch(ret){
771
467
case GNUTLS_E_INTERRUPTED:
772
468
case GNUTLS_E_AGAIN:
773
469
break;
774
470
case GNUTLS_E_REHANDSHAKE:
775
do {
776
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
782
if(ret < 0){
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
784
gnutls_perror(ret);
785
goto mandos_end;
471
ret = gnutls_handshake (es.session);
472
if (ret < 0){
473
fprintf(stderr, "\n*** Handshake failed ***\n");
474
gnutls_perror (ret);
475
retval = -1;
476
goto exit;
786
477
}
787
478
break;
788
479
default:
789
480
fprintf(stderr, "Unknown error while reading data from"
790
" encrypted session with Mandos server\n");
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
792
goto mandos_end;
481
" encrypted session with mandos server\n");
482
retval = -1;
483
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
484
goto exit;
793
485
}
794
486
} else {
795
buffer_length += (size_t) sret;
796
}
797
}
798
799
if(debug){
800
fprintf(stderr, "Closing TLS session\n");
801
}
802
803
if(quit_now){
804
goto mandos_end;
805
}
806
807
do {
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
809
if(quit_now){
810
goto mandos_end;
811
}
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
813
814
if(buffer_length > 0){
815
ssize_t decrypted_buffer_size;
487
buffer_length += (size_t) ret;
488
}
489
}
490
491
if (buffer_length > 0){
816
492
decrypted_buffer_size = pgp_packet_decrypt(buffer,
817
493
buffer_length,
818
&decrypted_buffer);
819
if(decrypted_buffer_size >= 0){
820
821
written = 0;
494
&decrypted_buffer,
495
certdir);
496
if (decrypted_buffer_size >= 0){
822
497
while(written < (size_t) decrypted_buffer_size){
823
if(quit_now){
824
goto mandos_end;
825
}
826
827
ret = (int)fwrite(decrypted_buffer + written, 1,
828
(size_t)decrypted_buffer_size - written,
829
stdout);
498
ret = (int)fwrite (decrypted_buffer + written, 1,
499
(size_t)decrypted_buffer_size - written,
500
stdout);
830
501
if(ret == 0 and ferror(stdout)){
831
502
if(debug){
832
503
fprintf(stderr, "Error writing encrypted data: %s\n",
833
504
strerror(errno));
834
505
}
835
goto mandos_end;
506
retval = -1;
507
break;
836
508
}
837
509
written += (size_t)ret;
838
510
}
839
retval = 0;
511
free(decrypted_buffer);
512
} else {
513
retval = -1;
840
514
}
841
515
}
842
843
/* Shutdown procedure */
844
845
mandos_end:
846
free(decrypted_buffer);
516
517
//shutdown procedure
518
519
if(debug){
520
fprintf(stderr, "Closing TLS session\n");
521
}
522
847
523
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
851
if(ret == -1){
852
perror("close");
853
}
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
524
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
525
exit:
526
close(tcp_sd);
527
gnutls_deinit (es.session);
528
gnutls_certificate_free_credentials (es.cred);
529
gnutls_global_deinit ();
858
530
return retval;
859
531
}
860
532
861
static void resolve_callback(AvahiSServiceResolver *r,
862
AvahiIfIndex interface,
863
AvahiProtocol proto,
864
AvahiResolverEvent event,
865
const char *name,
866
const char *type,
867
const char *domain,
868
const char *host_name,
869
const AvahiAddress *address,
870
uint16_t port,
871
AVAHI_GCC_UNUSED AvahiStringList *txt,
872
AVAHI_GCC_UNUSED AvahiLookupResultFlags
873
flags,
874
AVAHI_GCC_UNUSED void* userdata){
875
assert(r);
533
static AvahiSimplePoll *simple_poll = NULL;
534
static AvahiServer *server = NULL;
535
536
static void resolve_callback(
537
AvahiSServiceResolver *r,
538
AvahiIfIndex interface,
539
AVAHI_GCC_UNUSED AvahiProtocol protocol,
540
AvahiResolverEvent event,
541
const char *name,
542
const char *type,
543
const char *domain,
544
const char *host_name,
545
const AvahiAddress *address,
546
uint16_t port,
547
AVAHI_GCC_UNUSED AvahiStringList *txt,
548
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
549
AVAHI_GCC_UNUSED void* userdata) {
550
551
assert(r); /* Spurious warning */
876
552
877
553
/* Called whenever a service has been resolved successfully or
878
554
timed out */
879
555
880
if(quit_now){
881
return;
882
}
883
884
switch(event){
556
switch (event) {
885
557
default:
886
558
case AVAHI_RESOLVER_FAILURE:
887
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
888
" of type '%s' in domain '%s': %s\n", name, type, domain,
889
avahi_strerror(avahi_server_errno(mc.server)));
559
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
560
" type '%s' in domain '%s': %s\n", name, type, domain,
561
avahi_strerror(avahi_server_errno(server)));
890
562
break;
891
563
892
564
case AVAHI_RESOLVER_FOUND:
894
566
char ip[AVAHI_ADDRESS_STR_MAX];
895
567
avahi_address_snprint(ip, sizeof(ip), address);
896
568
if(debug){
897
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
898
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
899
ip, (intmax_t)interface, port);
569
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
570
" port %d\n", name, host_name, ip, port);
900
571
}
901
int ret = start_mandos_communication(ip, port, interface,
902
avahi_proto_to_af(proto));
903
if(ret == 0){
904
avahi_simple_poll_quit(mc.simple_poll);
572
int ret = start_mandos_communication(ip, port, interface);
573
if (ret == 0){
574
exit(EXIT_SUCCESS);
905
575
}
906
576
}
907
577
}
908
578
avahi_s_service_resolver_free(r);
909
579
}
910
580
911
static void browse_callback(AvahiSServiceBrowser *b,
912
AvahiIfIndex interface,
913
AvahiProtocol protocol,
914
AvahiBrowserEvent event,
915
const char *name,
916
const char *type,
917
const char *domain,
918
AVAHI_GCC_UNUSED AvahiLookupResultFlags
919
flags,
920
AVAHI_GCC_UNUSED void* userdata){
921
assert(b);
922
923
/* Called whenever a new services becomes available on the LAN or
924
is removed from the LAN */
925
926
if(quit_now){
927
return;
928
}
929
930
switch(event){
931
default:
932
case AVAHI_BROWSER_FAILURE:
933
934
fprintf(stderr, "(Avahi browser) %s\n",
935
avahi_strerror(avahi_server_errno(mc.server)));
936
avahi_simple_poll_quit(mc.simple_poll);
937
return;
938
939
case AVAHI_BROWSER_NEW:
940
/* We ignore the returned Avahi resolver object. In the callback
941
function we free it. If the Avahi server is terminated before
942
the callback function is called the Avahi server will free the
943
resolver for us. */
944
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
name, avahi_strerror(avahi_server_errno(mc.server)));
950
break;
951
952
case AVAHI_BROWSER_REMOVE:
953
break;
954
955
case AVAHI_BROWSER_ALL_FOR_NOW:
956
case AVAHI_BROWSER_CACHE_EXHAUSTED:
957
if(debug){
958
fprintf(stderr, "No Mandos server found, still searching...\n");
581
static void browse_callback(
582
AvahiSServiceBrowser *b,
583
AvahiIfIndex interface,
584
AvahiProtocol protocol,
585
AvahiBrowserEvent event,
586
const char *name,
587
const char *type,
588
const char *domain,
589
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
590
void* userdata) {
591
592
AvahiServer *s = userdata;
593
assert(b); /* Spurious warning */
594
595
/* Called whenever a new services becomes available on the LAN or
596
is removed from the LAN */
597
598
switch (event) {
599
default:
600
case AVAHI_BROWSER_FAILURE:
601
602
fprintf(stderr, "(Browser) %s\n",
603
avahi_strerror(avahi_server_errno(server)));
604
avahi_simple_poll_quit(simple_poll);
605
return;
606
607
case AVAHI_BROWSER_NEW:
608
/* We ignore the returned resolver object. In the callback
609
function we free it. If the server is terminated before
610
the callback function is called the server will free
611
the resolver for us. */
612
613
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
614
type, domain,
615
AVAHI_PROTO_INET6, 0,
616
resolve_callback, s)))
617
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
618
avahi_strerror(avahi_server_errno(s)));
619
break;
620
621
case AVAHI_BROWSER_REMOVE:
622
break;
623
624
case AVAHI_BROWSER_ALL_FOR_NOW:
625
case AVAHI_BROWSER_CACHE_EXHAUSTED:
626
break;
959
627
}
960
break;
961
}
962
}
963
964
/* stop main loop after sigterm has been called */
965
static void handle_sigterm(int sig){
966
if(quit_now){
967
return;
968
}
969
quit_now = 1;
970
signal_received = sig;
971
int old_errno = errno;
972
if(mc.simple_poll != NULL){
973
avahi_simple_poll_quit(mc.simple_poll);
974
}
975
errno = old_errno;
976
}
977
978
int main(int argc, char *argv[]){
979
AvahiSServiceBrowser *sb = NULL;
980
int error;
981
int ret;
982
intmax_t tmpmax;
628
}
629
630
/* combinds file name and path and returns the malloced new string. som sane checks could/should be added */
631
const char *combinepath(const char *first, const char *second){
983
632
char *tmp;
984
int exitcode = EXIT_SUCCESS;
985
const char *interface = "eth0";
986
struct ifreq network;
987
int sd = -1;
988
bool take_down_interface = false;
989
uid_t uid;
990
gid_t gid;
991
char *connect_to = NULL;
992
char tempdir[] = "/tmp/mandosXXXXXX";
993
bool tempdir_created = false;
994
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
995
const char *seckey = PATHDIR "/" SECKEY;
996
const char *pubkey = PATHDIR "/" PUBKEY;
997
998
bool gnutls_initialized = false;
999
bool gpgme_initialized = false;
1000
float delay = 2.5f;
1001
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1004
1005
uid = getuid();
1006
gid = getgid();
1007
1008
/* Lower any group privileges we might have, just to be safe */
1009
errno = 0;
1010
ret = setgid(gid);
1011
if(ret == -1){
1012
perror("setgid");
1013
}
1014
1015
/* Lower user privileges (temporarily) */
1016
errno = 0;
1017
ret = seteuid(uid);
1018
if(ret == -1){
1019
perror("seteuid");
1020
}
1021
1022
if(quit_now){
1023
goto end;
1024
}
1025
1026
{
1027
struct argp_option options[] = {
1028
{ .name = "debug", .key = 128,
1029
.doc = "Debug mode", .group = 3 },
1030
{ .name = "connect", .key = 'c',
1031
.arg = "ADDRESS:PORT",
1032
.doc = "Connect directly to a specific Mandos server",
1033
.group = 1 },
1034
{ .name = "interface", .key = 'i',
1035
.arg = "NAME",
1036
.doc = "Network interface that will be used to search for"
1037
" Mandos servers",
1038
.group = 1 },
1039
{ .name = "seckey", .key = 's',
1040
.arg = "FILE",
1041
.doc = "OpenPGP secret key file base name",
1042
.group = 1 },
1043
{ .name = "pubkey", .key = 'p',
1044
.arg = "FILE",
1045
.doc = "OpenPGP public key file base name",
1046
.group = 2 },
1047
{ .name = "dh-bits", .key = 129,
1048
.arg = "BITS",
1049
.doc = "Bit length of the prime number used in the"
1050
" Diffie-Hellman key exchange",
1051
.group = 2 },
1052
{ .name = "priority", .key = 130,
1053
.arg = "STRING",
1054
.doc = "GnuTLS priority string for the TLS handshake",
1055
.group = 1 },
1056
{ .name = "delay", .key = 131,
1057
.arg = "SECONDS",
1058
.doc = "Maximum delay to wait for interface startup",
1059
.group = 2 },
1060
/*
1061
* These reproduce what we would get without ARGP_NO_HELP
1062
*/
1063
{ .name = "help", .key = '?',
1064
.doc = "Give this help list", .group = -1 },
1065
{ .name = "usage", .key = -3,
1066
.doc = "Give a short usage message", .group = -1 },
1067
{ .name = "version", .key = 'V',
1068
.doc = "Print program version", .group = -1 },
1069
{ .name = NULL }
1070
};
1071
1072
error_t parse_opt(int key, char *arg,
1073
struct argp_state *state){
1074
errno = 0;
1075
switch(key){
1076
case 128: /* --debug */
1077
debug = true;
1078
break;
1079
case 'c': /* --connect */
1080
connect_to = arg;
1081
break;
1082
case 'i': /* --interface */
1083
interface = arg;
1084
break;
1085
case 's': /* --seckey */
1086
seckey = arg;
1087
break;
1088
case 'p': /* --pubkey */
1089
pubkey = arg;
1090
break;
1091
case 129: /* --dh-bits */
1092
errno = 0;
1093
tmpmax = strtoimax(arg, &tmp, 10);
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1096
argp_error(state, "Bad number of DH bits");
1097
}
1098
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1099
break;
1100
case 130: /* --priority */
1101
mc.priority = arg;
1102
break;
1103
case 131: /* --delay */
1104
errno = 0;
1105
delay = strtof(arg, &tmp);
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
argp_error(state, "Bad delay");
1108
}
1109
break;
1110
/*
1111
* These reproduce what we would get without ARGP_NO_HELP
1112
*/
1113
case '?': /* --help */
1114
argp_state_help(state, state->out_stream,
1115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1117
case -3: /* --usage */
1118
argp_state_help(state, state->out_stream,
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1122
exit(argp_err_exit_status);
1123
break;
1124
default:
1125
return ARGP_ERR_UNKNOWN;
1126
}
1127
return errno;
1128
}
1129
1130
struct argp argp = { .options = options, .parser = parse_opt,
1131
.args_doc = "",
1132
.doc = "Mandos client -- Get and decrypt"
1133
" passwords from a Mandos server" };
1134
ret = argp_parse(&argp, argc, argv,
1135
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1136
switch(ret){
1137
case 0:
1138
break;
1139
case ENOMEM:
1140
default:
1141
errno = ret;
1142
perror("argp_parse");
1143
exitcode = EX_OSERR;
1144
goto end;
1145
case EINVAL:
1146
exitcode = EX_USAGE;
1147
goto end;
1148
}
1149
}
1150
1151
if(not debug){
1152
avahi_set_log_function(empty_log);
1153
}
1154
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1156
from the signal handler */
1157
/* Initialize the pseudo-RNG for Avahi */
1158
srand((unsigned int) time(NULL));
1159
mc.simple_poll = avahi_simple_poll_new();
1160
if(mc.simple_poll == NULL){
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
1166
sigemptyset(&sigterm_action.sa_mask);
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1168
if(ret == -1){
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1174
if(ret == -1){
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1177
goto end;
1178
}
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1180
if(ret == -1){
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1183
goto end;
1184
}
1185
/* Need to check if the handler is SIG_IGN before handling:
1186
| [[info:libc:Initial Signal Actions]] |
1187
| [[info:libc:Basic Signal Handling]] |
1188
*/
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1190
if(ret == -1){
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1193
}
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1196
if(ret == -1){
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1199
goto end;
1200
}
1201
}
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1203
if(ret == -1){
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1206
}
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1209
if(ret == -1){
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1214
}
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1216
if(ret == -1){
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1219
}
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1222
if(ret == -1){
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
}
1228
1229
/* If the interface is down, bring it up */
1230
if(interface[0] != '\0'){
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1232
if(if_index == 0){
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1235
goto end;
1236
}
1237
1238
if(quit_now){
1239
goto end;
1240
}
1241
1242
/* Re-raise priviliges */
1243
errno = 0;
1244
ret = seteuid(0);
1245
if(ret == -1){
1246
perror("seteuid");
1247
}
1248
1249
#ifdef __linux__
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
messages about the network interface to mess up the prompt */
1252
ret = klogctl(8, NULL, 5);
1253
bool restore_loglevel = true;
1254
if(ret == -1){
1255
restore_loglevel = false;
1256
perror("klogctl");
1257
}
1258
#endif /* __linux__ */
1259
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1261
if(sd < 0){
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1264
#ifdef __linux__
1265
if(restore_loglevel){
1266
ret = klogctl(7, NULL, 0);
1267
if(ret == -1){
1268
perror("klogctl");
1269
}
1270
}
1271
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
1275
if(ret == -1){
1276
perror("seteuid");
1277
}
1278
goto end;
1279
}
1280
strcpy(network.ifr_name, interface);
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1282
if(ret == -1){
1283
perror("ioctl SIOCGIFFLAGS");
1284
#ifdef __linux__
1285
if(restore_loglevel){
1286
ret = klogctl(7, NULL, 0);
1287
if(ret == -1){
1288
perror("klogctl");
1289
}
1290
}
1291
#endif /* __linux__ */
1292
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1299
goto end;
1300
}
1301
if((network.ifr_flags & IFF_UP) == 0){
1302
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1305
if(ret == -1){
1306
take_down_interface = false;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
1309
#ifdef __linux__
1310
if(restore_loglevel){
1311
ret = klogctl(7, NULL, 0);
1312
if(ret == -1){
1313
perror("klogctl");
1314
}
1315
}
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
1320
if(ret == -1){
1321
perror("seteuid");
1322
}
1323
goto end;
1324
}
1325
}
1326
/* sleep checking until interface is running */
1327
for(int i=0; i < delay * 4; i++){
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1329
if(ret == -1){
1330
perror("ioctl SIOCGIFFLAGS");
1331
} else if(network.ifr_flags & IFF_RUNNING){
1332
break;
1333
}
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1335
ret = nanosleep(&sleeptime, NULL);
1336
if(ret == -1 and errno != EINTR){
1337
perror("nanosleep");
1338
}
1339
}
1340
if(not take_down_interface){
1341
/* We won't need the socket anymore */
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1343
if(ret == -1){
1344
perror("close");
1345
}
1346
}
1347
#ifdef __linux__
1348
if(restore_loglevel){
1349
/* Restores kernel loglevel to default */
1350
ret = klogctl(7, NULL, 0);
1351
if(ret == -1){
1352
perror("klogctl");
1353
}
1354
}
1355
#endif /* __linux__ */
1356
/* Lower privileges */
1357
errno = 0;
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
1370
}
1371
}
1372
1373
if(quit_now){
1374
goto end;
1375
}
1376
1377
ret = init_gnutls_global(pubkey, seckey);
1378
if(ret == -1){
1379
fprintf(stderr, "init_gnutls_global failed\n");
1380
exitcode = EXIT_FAILURE;
1381
goto end;
1382
} else {
1383
gnutls_initialized = true;
1384
}
1385
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1391
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1393
perror("mkdtemp");
1394
goto end;
1395
}
1396
1397
if(quit_now){
1398
goto end;
1399
}
1400
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1402
fprintf(stderr, "init_gpgme failed\n");
1403
exitcode = EXIT_FAILURE;
1404
goto end;
1405
} else {
1406
gpgme_initialized = true;
1407
}
1408
1409
if(quit_now){
1410
goto end;
1411
}
1412
1413
if(connect_to != NULL){
1414
/* Connect directly, do not use Zeroconf */
1415
/* (Mainly meant for debugging) */
1416
char *address = strrchr(connect_to, ':');
1417
if(address == NULL){
1418
fprintf(stderr, "No colon in address\n");
1419
exitcode = EXIT_FAILURE;
1420
goto end;
1421
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1427
uint16_t port;
1428
errno = 0;
1429
tmpmax = strtoimax(address+1, &tmp, 10);
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1431
or tmpmax != (uint16_t)tmpmax){
1432
fprintf(stderr, "Bad port number\n");
1433
exitcode = EXIT_FAILURE;
1434
goto end;
1435
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1441
port = (uint16_t)tmpmax;
1442
*address = '\0';
1443
address = connect_to;
1444
/* Colon in address indicates IPv6 */
1445
int af;
1446
if(strchr(address, ':') != NULL){
1447
af = AF_INET6;
1448
} else {
1449
af = AF_INET;
1450
}
1451
1452
if(quit_now){
1453
goto end;
1454
}
1455
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
1460
exitcode = EXIT_SUCCESS;
1461
}
1462
goto end;
1463
}
1464
1465
if(quit_now){
1466
goto end;
1467
}
1468
1469
{
633
tmp = malloc(strlen(first) + strlen(second) + 2);
634
if (tmp == NULL){
635
perror("malloc");
636
return NULL;
637
}
638
strcpy(tmp, first);
639
if (first[0] != '\0' and first[strlen(first) - 1] != '/'){
640
strcat(tmp, "/");
641
}
642
strcat(tmp, second);
643
return tmp;
644
}
645
646
647
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
1470
648
AvahiServerConfig config;
1471
/* Do not publish any local Zeroconf records */
649
AvahiSServiceBrowser *sb = NULL;
650
int error;
651
int ret;
652
int returncode = EXIT_SUCCESS;
653
const char *interface = NULL;
654
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
655
char *connect_to = NULL;
656
657
while (true){
658
static struct option long_options[] = {
659
{"debug", no_argument, (int *)&debug, 1},
660
{"connect", required_argument, 0, 'C'},
661
{"interface", required_argument, 0, 'i'},
662
{"certdir", required_argument, 0, 'd'},
663
{"certkey", required_argument, 0, 'c'},
664
{"certfile", required_argument, 0, 'k'},
665
{0, 0, 0, 0} };
666
667
int option_index = 0;
668
ret = getopt_long (argc, argv, "i:", long_options,
669
&option_index);
670
671
if (ret == -1){
672
break;
673
}
674
675
switch(ret){
676
case 0:
677
break;
678
case 'i':
679
interface = optarg;
680
break;
681
case 'C':
682
connect_to = optarg;
683
break;
684
case 'd':
685
certdir = optarg;
686
break;
687
case 'c':
688
certfile = optarg;
689
break;
690
case 'k':
691
certkey = optarg;
692
break;
693
default:
694
exit(EXIT_FAILURE);
695
}
696
}
697
698
certfile = combinepath(certdir, certfile);
699
if (certfile == NULL){
700
goto exit;
701
}
702
703
if(interface != NULL){
704
if_index = (AvahiIfIndex) if_nametoindex(interface);
705
if(if_index == 0){
706
fprintf(stderr, "No such interface: \"%s\"\n", interface);
707
exit(EXIT_FAILURE);
708
}
709
}
710
711
if(connect_to != NULL){
712
/* Connect directly, do not use Zeroconf */
713
/* (Mainly meant for debugging) */
714
char *address = strrchr(connect_to, ':');
715
if(address == NULL){
716
fprintf(stderr, "No colon in address\n");
717
exit(EXIT_FAILURE);
718
}
719
errno = 0;
720
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
721
if(errno){
722
perror("Bad port number");
723
exit(EXIT_FAILURE);
724
}
725
*address = '\0';
726
address = connect_to;
727
ret = start_mandos_communication(address, port, if_index);
728
if(ret < 0){
729
exit(EXIT_FAILURE);
730
} else {
731
exit(EXIT_SUCCESS);
732
}
733
}
734
735
certkey = combinepath(certdir, certkey);
736
if (certkey == NULL){
737
goto exit;
738
}
739
740
if (not debug){
741
avahi_set_log_function(empty_log);
742
}
743
744
/* Initialize the psuedo-RNG */
745
srand((unsigned int) time(NULL));
746
747
/* Allocate main loop object */
748
if (!(simple_poll = avahi_simple_poll_new())) {
749
fprintf(stderr, "Failed to create simple poll object.\n");
750
751
goto exit;
752
}
753
754
/* Do not publish any local records */
1472
755
avahi_server_config_init(&config);
1473
756
config.publish_hinfo = 0;
1474
757
config.publish_addresses = 0;
1475
758
config.publish_workstation = 0;
1476
759
config.publish_domain = 0;
1477
760
1478
761
/* Allocate a new server */
1479
mc.server = avahi_server_new(avahi_simple_poll_get
1480
(mc.simple_poll), &config, NULL,
1481
NULL, &error);
1482
1483
/* Free the Avahi configuration data */
762
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
763
&config, NULL, NULL, &error);
764
765
/* Free the configuration data */
1484
766
avahi_server_config_free(&config);
1485
}
1486
1487
/* Check if creating the Avahi server object succeeded */
1488
if(mc.server == NULL){
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1490
avahi_strerror(error));
1491
exitcode = EXIT_FAILURE;
1492
goto end;
1493
}
1494
1495
if(quit_now){
1496
goto end;
1497
}
1498
1499
/* Create the Avahi service browser */
1500
sb = avahi_s_service_browser_new(mc.server, if_index,
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1502
NULL, 0, browse_callback, NULL);
1503
if(sb == NULL){
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1505
avahi_strerror(avahi_server_errno(mc.server)));
1506
exitcode = EXIT_FAILURE;
1507
goto end;
1508
}
1509
1510
if(quit_now){
1511
goto end;
1512
}
1513
1514
/* Run the main loop */
1515
1516
if(debug){
1517
fprintf(stderr, "Starting Avahi loop search\n");
1518
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
1521
1522
end:
1523
1524
if(debug){
1525
fprintf(stderr, "%s exiting\n", argv[0]);
1526
}
1527
1528
/* Cleanup things */
1529
if(sb != NULL)
1530
avahi_s_service_browser_free(sb);
1531
1532
if(mc.server != NULL)
1533
avahi_server_free(mc.server);
1534
1535
if(mc.simple_poll != NULL)
1536
avahi_simple_poll_free(mc.simple_poll);
1537
1538
if(gnutls_initialized){
1539
gnutls_certificate_free_credentials(mc.cred);
1540
gnutls_global_deinit();
1541
gnutls_dh_params_deinit(mc.dh_params);
1542
}
1543
1544
if(gpgme_initialized){
1545
gpgme_release(mc.ctx);
1546
}
1547
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
1551
errno = 0;
1552
ret = seteuid(0);
1553
if(ret == -1){
1554
perror("seteuid");
1555
}
1556
if(geteuid() == 0){
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1558
if(ret == -1){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1563
if(ret == -1){
1564
perror("ioctl SIOCSIFFLAGS");
1565
}
1566
}
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1568
if(ret == -1){
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
1576
}
1577
}
1578
}
1579
1580
/* Removes the temp directory used by GPGME */
1581
if(tempdir_created){
1582
DIR *d;
1583
struct dirent *direntry;
1584
d = opendir(tempdir);
1585
if(d == NULL){
1586
if(errno != ENOENT){
1587
perror("opendir");
1588
}
1589
} else {
1590
while(true){
1591
direntry = readdir(d);
1592
if(direntry == NULL){
1593
break;
1594
}
1595
/* Skip "." and ".." */
1596
if(direntry->d_name[0] == '.'
1597
and (direntry->d_name[1] == '\0'
1598
or (direntry->d_name[1] == '.'
1599
and direntry->d_name[2] == '\0'))){
1600
continue;
1601
}
1602
char *fullname = NULL;
1603
ret = asprintf(&fullname, "%s/%s", tempdir,
1604
direntry->d_name);
1605
if(ret < 0){
1606
perror("asprintf");
1607
continue;
1608
}
1609
ret = remove(fullname);
1610
if(ret == -1){
1611
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1612
strerror(errno));
1613
}
1614
free(fullname);
1615
}
1616
closedir(d);
1617
}
1618
ret = rmdir(tempdir);
1619
if(ret == -1 and errno != ENOENT){
1620
perror("rmdir");
1621
}
1622
}
1623
1624
if(quit_now){
1625
sigemptyset(&old_sigterm_action.sa_mask);
1626
old_sigterm_action.sa_handler = SIG_DFL;
1627
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1628
&old_sigterm_action,
1629
NULL));
1630
if(ret == -1){
1631
perror("sigaction");
1632
}
1633
do {
1634
ret = raise(signal_received);
1635
} while(ret != 0 and errno == EINTR);
1636
if(ret != 0){
1637
perror("raise");
1638
abort();
1639
}
1640
TEMP_FAILURE_RETRY(pause());
1641
}
1642
1643
return exitcode;
767
768
/* Check if creating the server object succeeded */
769
if (!server) {
770
fprintf(stderr, "Failed to create server: %s\n",
771
avahi_strerror(error));
772
returncode = EXIT_FAILURE;
773
goto exit;
774
}
775
776
/* Create the service browser */
777
sb = avahi_s_service_browser_new(server, if_index,
778
AVAHI_PROTO_INET6,
779
"_mandos._tcp", NULL, 0,
780
browse_callback, server);
781
if (!sb) {
782
fprintf(stderr, "Failed to create service browser: %s\n",
783
avahi_strerror(avahi_server_errno(server)));
784
returncode = EXIT_FAILURE;
785
goto exit;
786
}
787
788
/* Run the main loop */
789
790
if (debug){
791
fprintf(stderr, "Starting avahi loop search\n");
792
}
793
794
avahi_simple_poll_loop(simple_poll);
795
796
exit:
797
798
if (debug){
799
fprintf(stderr, "%s exiting\n", argv[0]);
800
}
801
802
/* Cleanup things */
803
if (sb)
804
avahi_s_service_browser_free(sb);
805
806
if (server)
807
avahi_server_free(server);
808
809
if (simple_poll)
810
avahi_simple_poll_free(simple_poll);
811
free(certfile);
812
free(certkey);
813
814
return returncode;
1644
815
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0