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- Committer: Teddy Hogeborn
- Date: 2008-08-12 19:22:34 UTC
- Revision ID: teddy@fukt.bsnet.se-20080812192234-8bm17713ltih9ud1
* initramfs-tools-hook: New.
* initramfs-tools-hook-conf: New.
* initramfs-tools-hook-conf: New.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugins.d/password-request.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() */
34
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout,
38
ferror() */
44
39
#include <stdint.h> /* uint16_t, uint32_t */
45
40
#include <stddef.h> /* NULL, size_t, ssize_t */
46
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
42
srand() */
43
#include <stdbool.h> /* bool, true */
49
44
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
45
strerror(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
52
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
48
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
57
52
#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() */
53
struct in6_addr, inet_pton(),
54
connect() */
64
55
#include <assert.h> /* assert() */
65
56
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
57
#include <time.h> /* time() */
67
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
59
SIOCSIFFLAGS, if_indextoname(),
69
60
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
73
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
62
getuid(), getgid(), setuid(),
75
63
setgid() */
64
#include <netinet/in.h>
76
65
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
66
#include <iso646.h> /* not, and */
78
67
#include <argp.h> /* struct argp_option, error_t, struct
79
68
argp_state, struct argp,
80
69
argp_parse(), ARGP_KEY_ARG,
81
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
71
90
72
/* Avahi */
91
73
/* All Avahi types, constants and functions
99
81
#include <avahi-common/error.h>
100
82
101
83
/* GnuTLS */
102
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
103
functions:
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
104
85
gnutls_*
105
86
init_gnutls_session(),
106
87
GNUTLS_* */
107
#include <gnutls/openpgp.h>
108
/* gnutls_certificate_set_openpgp_key_file(),
88
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
109
89
GNUTLS_OPENPGP_FMT_BASE64 */
110
90
111
91
/* GPGME */
112
#include <gpgme.h> /* All GPGME types, constants and
113
functions:
92
#include <gpgme.h> /* All GPGME types, constants and functions
114
93
gpgme_*
115
94
GPGME_PROTOCOL_OpenPGP,
116
95
GPG_ERR_NO_* */
117
96
118
97
#define BUFFER_SIZE 256
119
98
120
#define PATHDIR "/conf/conf.d/mandos"
121
#define SECKEY "seckey.txt"
122
#define PUBKEY "pubkey.txt"
123
124
99
bool debug = false;
100
static const char *keydir = "/conf/conf.d/mandos";
125
101
static const char mandos_protocol_version[] = "1";
126
const char *argp_program_version = "mandos-client " VERSION;
102
const char *argp_program_version = "password-request 1.0";
127
103
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
128
104
129
105
/* Used for passing in values through the Avahi callback functions */
134
110
unsigned int dh_bits;
135
111
gnutls_dh_params_t dh_params;
136
112
const char *priority;
137
gpgme_ctx_t ctx;
138
113
} mandos_context;
139
114
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
145
sig_atomic_t quit_now = 0;
146
int signal_received = 0;
147
148
115
/*
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
150
* bytes. "buffer_capacity" is how much is currently allocated,
116
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
117
* "buffer_capacity" is how much is currently allocated,
151
118
* "buffer_length" is how much is already used.
152
119
*/
153
size_t incbuffer(char **buffer, size_t buffer_length,
120
size_t adjustbuffer(char **buffer, size_t buffer_length,
154
121
size_t buffer_capacity){
155
if(buffer_length + BUFFER_SIZE > buffer_capacity){
122
if (buffer_length + BUFFER_SIZE > buffer_capacity){
156
123
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
157
if(buffer == NULL){
124
if (buffer == NULL){
158
125
return 0;
159
126
}
160
127
buffer_capacity += BUFFER_SIZE;
163
130
}
164
131
165
132
/*
166
* Initialize GPGME.
133
* Decrypt OpenPGP data using keyrings in HOMEDIR.
134
* Returns -1 on error
167
135
*/
168
static bool init_gpgme(const char *seckey,
169
const char *pubkey, const char *tempdir){
136
static ssize_t pgp_packet_decrypt (const char *cryptotext,
137
size_t crypto_size,
138
char **plaintext,
139
const char *homedir){
140
gpgme_data_t dh_crypto, dh_plain;
141
gpgme_ctx_t ctx;
170
142
gpgme_error_t rc;
143
ssize_t ret;
144
size_t plaintext_capacity = 0;
145
ssize_t plaintext_length = 0;
171
146
gpgme_engine_info_t engine_info;
172
147
173
174
/*
175
* Helper function to insert pub and seckey to the engine keyring.
176
*/
177
bool import_key(const char *filename){
178
int ret;
179
int fd;
180
gpgme_data_t pgp_data;
181
182
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
183
if(fd == -1){
184
perror("open");
185
return false;
186
}
187
188
rc = gpgme_data_new_from_fd(&pgp_data, fd);
189
if(rc != GPG_ERR_NO_ERROR){
190
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
191
gpgme_strsource(rc), gpgme_strerror(rc));
192
return false;
193
}
194
195
rc = gpgme_op_import(mc.ctx, pgp_data);
196
if(rc != GPG_ERR_NO_ERROR){
197
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
198
gpgme_strsource(rc), gpgme_strerror(rc));
199
return false;
200
}
201
202
ret = (int)TEMP_FAILURE_RETRY(close(fd));
203
if(ret == -1){
204
perror("close");
205
}
206
gpgme_data_release(pgp_data);
207
return true;
208
}
209
210
if(debug){
211
fprintf(stderr, "Initializing GPGME\n");
148
if (debug){
149
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
212
150
}
213
151
214
152
/* Init GPGME */
215
153
gpgme_check_version(NULL);
216
154
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
217
if(rc != GPG_ERR_NO_ERROR){
155
if (rc != GPG_ERR_NO_ERROR){
218
156
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
219
157
gpgme_strsource(rc), gpgme_strerror(rc));
220
return false;
158
return -1;
221
159
}
222
160
223
/* Set GPGME home directory for the OpenPGP engine only */
224
rc = gpgme_get_engine_info(&engine_info);
225
if(rc != GPG_ERR_NO_ERROR){
161
/* Set GPGME home directory for the OpenPGP engine only */
162
rc = gpgme_get_engine_info (&engine_info);
163
if (rc != GPG_ERR_NO_ERROR){
226
164
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
227
165
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
166
return -1;
229
167
}
230
168
while(engine_info != NULL){
231
169
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
232
170
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
233
engine_info->file_name, tempdir);
171
engine_info->file_name, homedir);
234
172
break;
235
173
}
236
174
engine_info = engine_info->next;
237
175
}
238
176
if(engine_info == NULL){
239
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
240
return false;
241
}
242
243
/* Create new GPGME "context" */
244
rc = gpgme_new(&(mc.ctx));
245
if(rc != GPG_ERR_NO_ERROR){
246
fprintf(stderr, "bad gpgme_new: %s: %s\n",
247
gpgme_strsource(rc), gpgme_strerror(rc));
248
return false;
249
}
250
251
if(not import_key(pubkey) or not import_key(seckey)){
252
return false;
253
}
254
255
return true;
256
}
257
258
/*
259
* Decrypt OpenPGP data.
260
* Returns -1 on error
261
*/
262
static ssize_t pgp_packet_decrypt(const char *cryptotext,
263
size_t crypto_size,
264
char **plaintext){
265
gpgme_data_t dh_crypto, dh_plain;
266
gpgme_error_t rc;
267
ssize_t ret;
268
size_t plaintext_capacity = 0;
269
ssize_t plaintext_length = 0;
270
271
if(debug){
272
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
177
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
178
return -1;
273
179
}
274
180
275
181
/* Create new GPGME data buffer from memory cryptotext */
276
182
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
277
183
0);
278
if(rc != GPG_ERR_NO_ERROR){
184
if (rc != GPG_ERR_NO_ERROR){
279
185
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
280
186
gpgme_strsource(rc), gpgme_strerror(rc));
281
187
return -1;
283
189
284
190
/* Create new empty GPGME data buffer for the plaintext */
285
191
rc = gpgme_data_new(&dh_plain);
286
if(rc != GPG_ERR_NO_ERROR){
192
if (rc != GPG_ERR_NO_ERROR){
287
193
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
288
194
gpgme_strsource(rc), gpgme_strerror(rc));
289
195
gpgme_data_release(dh_crypto);
290
196
return -1;
291
197
}
292
198
199
/* Create new GPGME "context" */
200
rc = gpgme_new(&ctx);
201
if (rc != GPG_ERR_NO_ERROR){
202
fprintf(stderr, "bad gpgme_new: %s: %s\n",
203
gpgme_strsource(rc), gpgme_strerror(rc));
204
plaintext_length = -1;
205
goto decrypt_end;
206
}
207
293
208
/* Decrypt data from the cryptotext data buffer to the plaintext
294
209
data buffer */
295
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
296
if(rc != GPG_ERR_NO_ERROR){
210
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
211
if (rc != GPG_ERR_NO_ERROR){
297
212
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
298
213
gpgme_strsource(rc), gpgme_strerror(rc));
299
214
plaintext_length = -1;
300
if(debug){
301
gpgme_decrypt_result_t result;
302
result = gpgme_op_decrypt_result(mc.ctx);
303
if(result == NULL){
304
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
305
} else {
306
fprintf(stderr, "Unsupported algorithm: %s\n",
307
result->unsupported_algorithm);
308
fprintf(stderr, "Wrong key usage: %u\n",
309
result->wrong_key_usage);
310
if(result->file_name != NULL){
311
fprintf(stderr, "File name: %s\n", result->file_name);
312
}
313
gpgme_recipient_t recipient;
314
recipient = result->recipients;
215
goto decrypt_end;
216
}
217
218
if(debug){
219
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
220
}
221
222
if (debug){
223
gpgme_decrypt_result_t result;
224
result = gpgme_op_decrypt_result(ctx);
225
if (result == NULL){
226
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
227
} else {
228
fprintf(stderr, "Unsupported algorithm: %s\n",
229
result->unsupported_algorithm);
230
fprintf(stderr, "Wrong key usage: %u\n",
231
result->wrong_key_usage);
232
if(result->file_name != NULL){
233
fprintf(stderr, "File name: %s\n", result->file_name);
234
}
235
gpgme_recipient_t recipient;
236
recipient = result->recipients;
237
if(recipient){
315
238
while(recipient != NULL){
316
239
fprintf(stderr, "Public key algorithm: %s\n",
317
240
gpgme_pubkey_algo_name(recipient->pubkey_algo));
323
246
}
324
247
}
325
248
}
326
goto decrypt_end;
327
}
328
329
if(debug){
330
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
331
249
}
332
250
333
251
/* Seek back to the beginning of the GPGME plaintext data buffer */
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
335
perror("gpgme_data_seek");
252
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
253
perror("pgpme_data_seek");
336
254
plaintext_length = -1;
337
255
goto decrypt_end;
338
256
}
339
257
340
258
*plaintext = NULL;
341
259
while(true){
342
plaintext_capacity = incbuffer(plaintext,
260
plaintext_capacity = adjustbuffer(plaintext,
343
261
(size_t)plaintext_length,
344
262
plaintext_capacity);
345
if(plaintext_capacity == 0){
346
perror("incbuffer");
263
if (plaintext_capacity == 0){
264
perror("adjustbuffer");
347
265
plaintext_length = -1;
348
266
goto decrypt_end;
349
267
}
351
269
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
352
270
BUFFER_SIZE);
353
271
/* Print the data, if any */
354
if(ret == 0){
272
if (ret == 0){
355
273
/* EOF */
356
274
break;
357
275
}
362
280
}
363
281
plaintext_length += ret;
364
282
}
365
283
366
284
if(debug){
367
285
fprintf(stderr, "Decrypted password is: ");
368
286
for(ssize_t i = 0; i < plaintext_length; i++){
381
299
return plaintext_length;
382
300
}
383
301
384
static const char * safer_gnutls_strerror(int value){
385
const char *ret = gnutls_strerror(value); /* Spurious warning from
386
-Wunreachable-code */
387
if(ret == NULL)
302
static const char * safer_gnutls_strerror (int value) {
303
const char *ret = gnutls_strerror (value);
304
if (ret == NULL)
388
305
ret = "(unknown)";
389
306
return ret;
390
307
}
395
312
fprintf(stderr, "GnuTLS: %s", string);
396
313
}
397
314
398
static int init_gnutls_global(const char *pubkeyfilename,
399
const char *seckeyfilename){
315
static int init_gnutls_global(mandos_context *mc,
316
const char *pubkeyfile,
317
const char *seckeyfile){
400
318
int ret;
401
319
402
320
if(debug){
404
322
}
405
323
406
324
ret = gnutls_global_init();
407
if(ret != GNUTLS_E_SUCCESS){
408
fprintf(stderr, "GnuTLS global_init: %s\n",
409
safer_gnutls_strerror(ret));
325
if (ret != GNUTLS_E_SUCCESS) {
326
fprintf (stderr, "GnuTLS global_init: %s\n",
327
safer_gnutls_strerror(ret));
410
328
return -1;
411
329
}
412
330
413
if(debug){
331
if (debug){
414
332
/* "Use a log level over 10 to enable all debugging options."
415
333
* - GnuTLS manual
416
334
*/
419
337
}
420
338
421
339
/* OpenPGP credentials */
422
gnutls_certificate_allocate_credentials(&mc.cred);
423
if(ret != GNUTLS_E_SUCCESS){
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
428
safer_gnutls_strerror(ret));
429
gnutls_global_deinit();
340
gnutls_certificate_allocate_credentials(&mc->cred);
341
if (ret != GNUTLS_E_SUCCESS){
342
fprintf (stderr, "GnuTLS memory error: %s\n",
343
safer_gnutls_strerror(ret));
344
gnutls_global_deinit ();
430
345
return -1;
431
346
}
432
347
433
348
if(debug){
434
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
435
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
436
seckeyfilename);
349
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
350
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
351
seckeyfile);
437
352
}
438
353
439
354
ret = gnutls_certificate_set_openpgp_key_file
440
(mc.cred, pubkeyfilename, seckeyfilename,
441
GNUTLS_OPENPGP_FMT_BASE64);
442
if(ret != GNUTLS_E_SUCCESS){
355
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
356
if (ret != GNUTLS_E_SUCCESS) {
443
357
fprintf(stderr,
444
358
"Error[%d] while reading the OpenPGP key pair ('%s',"
445
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
fprintf(stderr, "The GnuTLS error is: %s\n",
359
" '%s')\n", ret, pubkeyfile, seckeyfile);
360
fprintf(stdout, "The GnuTLS error is: %s\n",
447
361
safer_gnutls_strerror(ret));
448
362
goto globalfail;
449
363
}
450
364
451
365
/* GnuTLS server initialization */
452
ret = gnutls_dh_params_init(&mc.dh_params);
453
if(ret != GNUTLS_E_SUCCESS){
454
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
455
" %s\n", safer_gnutls_strerror(ret));
456
goto globalfail;
457
}
458
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
459
if(ret != GNUTLS_E_SUCCESS){
460
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
461
safer_gnutls_strerror(ret));
462
goto globalfail;
463
}
464
465
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
466
366
ret = gnutls_dh_params_init(&mc->dh_params);
367
if (ret != GNUTLS_E_SUCCESS) {
368
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
369
" %s\n", safer_gnutls_strerror(ret));
370
goto globalfail;
371
}
372
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
373
if (ret != GNUTLS_E_SUCCESS) {
374
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
375
safer_gnutls_strerror(ret));
376
goto globalfail;
377
}
378
379
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
380
467
381
return 0;
468
382
469
383
globalfail:
470
471
gnutls_certificate_free_credentials(mc.cred);
384
385
gnutls_certificate_free_credentials(mc->cred);
472
386
gnutls_global_deinit();
473
gnutls_dh_params_deinit(mc.dh_params);
474
387
return -1;
388
475
389
}
476
390
477
static int init_gnutls_session(gnutls_session_t *session){
391
static int init_gnutls_session(mandos_context *mc,
392
gnutls_session_t *session){
478
393
int ret;
479
394
/* GnuTLS session creation */
480
do {
481
ret = gnutls_init(session, GNUTLS_SERVER);
482
if(quit_now){
483
return -1;
484
}
485
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
486
if(ret != GNUTLS_E_SUCCESS){
395
ret = gnutls_init(session, GNUTLS_SERVER);
396
if (ret != GNUTLS_E_SUCCESS){
487
397
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
488
398
safer_gnutls_strerror(ret));
489
399
}
490
400
491
401
{
492
402
const char *err;
493
do {
494
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
495
if(quit_now){
496
gnutls_deinit(*session);
497
return -1;
498
}
499
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
500
if(ret != GNUTLS_E_SUCCESS){
403
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
404
if (ret != GNUTLS_E_SUCCESS) {
501
405
fprintf(stderr, "Syntax error at: %s\n", err);
502
406
fprintf(stderr, "GnuTLS error: %s\n",
503
407
safer_gnutls_strerror(ret));
504
gnutls_deinit(*session);
408
gnutls_deinit (*session);
505
409
return -1;
506
410
}
507
411
}
508
412
509
do {
510
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
511
mc.cred);
512
if(quit_now){
513
gnutls_deinit(*session);
514
return -1;
515
}
516
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
517
if(ret != GNUTLS_E_SUCCESS){
413
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
414
mc->cred);
415
if (ret != GNUTLS_E_SUCCESS) {
518
416
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
519
417
safer_gnutls_strerror(ret));
520
gnutls_deinit(*session);
418
gnutls_deinit (*session);
521
419
return -1;
522
420
}
523
421
524
422
/* ignore client certificate if any. */
525
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
423
gnutls_certificate_server_set_request (*session,
424
GNUTLS_CERT_IGNORE);
526
425
527
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
426
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
528
427
529
428
return 0;
530
429
}
536
435
/* Called when a Mandos server is found */
537
436
static int start_mandos_communication(const char *ip, uint16_t port,
538
437
AvahiIfIndex if_index,
539
int af){
540
int ret, tcp_sd = -1;
541
ssize_t sret;
542
union {
543
struct sockaddr_in in;
544
struct sockaddr_in6 in6;
545
} to;
438
mandos_context *mc){
439
int ret, tcp_sd;
440
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
546
441
char *buffer = NULL;
547
442
char *decrypted_buffer;
548
443
size_t buffer_length = 0;
549
444
size_t buffer_capacity = 0;
445
ssize_t decrypted_buffer_size;
550
446
size_t written;
551
447
int retval = 0;
448
char interface[IF_NAMESIZE];
552
449
gnutls_session_t session;
553
int pf; /* Protocol family */
554
555
if(quit_now){
556
return -1;
557
}
558
559
switch(af){
560
case AF_INET6:
561
pf = PF_INET6;
562
break;
563
case AF_INET:
564
pf = PF_INET;
565
break;
566
default:
567
fprintf(stderr, "Bad address family: %d\n", af);
568
return -1;
569
}
570
571
ret = init_gnutls_session(&session);
572
if(ret != 0){
450
451
ret = init_gnutls_session (mc, &session);
452
if (ret != 0){
573
453
return -1;
574
454
}
575
455
576
456
if(debug){
577
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
457
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
578
458
"\n", ip, port);
579
459
}
580
460
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
if(tcp_sd < 0){
461
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
462
if(tcp_sd < 0) {
583
463
perror("socket");
584
retval = -1;
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
retval = -1;
590
goto mandos_end;
591
}
592
593
memset(&to, 0, sizeof(to));
594
if(af == AF_INET6){
595
to.in6.sin6_family = (sa_family_t)af;
596
ret = inet_pton(af, ip, &to.in6.sin6_addr);
597
} else { /* IPv4 */
598
to.in.sin_family = (sa_family_t)af;
599
ret = inet_pton(af, ip, &to.in.sin_addr);
600
}
601
if(ret < 0 ){
464
return -1;
465
}
466
467
if(debug){
468
if(if_indextoname((unsigned int)if_index, interface) == NULL){
469
perror("if_indextoname");
470
return -1;
471
}
472
fprintf(stderr, "Binding to interface %s\n", interface);
473
}
474
475
memset(&to,0,sizeof(to)); /* Spurious warning */
476
to.in6.sin6_family = AF_INET6;
477
/* It would be nice to have a way to detect if we were passed an
478
IPv4 address here. Now we assume an IPv6 address. */
479
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
480
if (ret < 0 ){
602
481
perror("inet_pton");
603
retval = -1;
604
goto mandos_end;
482
return -1;
605
483
}
606
484
if(ret == 0){
607
485
fprintf(stderr, "Bad address: %s\n", ip);
608
retval = -1;
609
goto mandos_end;
610
}
611
if(af == AF_INET6){
612
to.in6.sin6_port = htons(port); /* Spurious warnings from
613
-Wconversion and
614
-Wunreachable-code */
615
616
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
617
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
618
-Wunreachable-code*/
619
if(if_index == AVAHI_IF_UNSPEC){
620
fprintf(stderr, "An IPv6 link-local address is incomplete"
621
" without a network interface\n");
622
retval = -1;
623
goto mandos_end;
624
}
625
/* Set the network interface number as scope */
626
to.in6.sin6_scope_id = (uint32_t)if_index;
627
}
628
} else {
629
to.in.sin_port = htons(port); /* Spurious warnings from
630
-Wconversion and
631
-Wunreachable-code */
632
}
486
return -1;
487
}
488
to.in6.sin6_port = htons(port); /* Spurious warning */
633
489
634
if(quit_now){
635
retval = -1;
636
goto mandos_end;
637
}
490
to.in6.sin6_scope_id = (uint32_t)if_index;
638
491
639
492
if(debug){
640
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
641
char interface[IF_NAMESIZE];
642
if(if_indextoname((unsigned int)if_index, interface) == NULL){
643
perror("if_indextoname");
644
} else {
645
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
646
ip, interface, port);
647
}
648
} else {
649
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
650
port);
651
}
652
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
653
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
654
const char *pcret;
655
if(af == AF_INET6){
656
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
657
sizeof(addrstr));
658
} else {
659
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
660
sizeof(addrstr));
661
}
662
if(pcret == NULL){
493
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
494
port);
495
char addrstr[INET6_ADDRSTRLEN] = "";
496
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
497
sizeof(addrstr)) == NULL){
663
498
perror("inet_ntop");
664
499
} else {
665
500
if(strcmp(addrstr, ip) != 0){
668
503
}
669
504
}
670
505
671
if(quit_now){
672
retval = -1;
673
goto mandos_end;
674
}
675
676
if(af == AF_INET6){
677
ret = connect(tcp_sd, &to.in6, sizeof(to));
678
} else {
679
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
680
}
681
if(ret < 0){
506
ret = connect(tcp_sd, &to.in, sizeof(to));
507
if (ret < 0){
682
508
perror("connect");
683
retval = -1;
684
goto mandos_end;
685
}
686
687
if(quit_now){
688
retval = -1;
689
goto mandos_end;
690
}
691
509
return -1;
510
}
511
692
512
const char *out = mandos_protocol_version;
693
513
written = 0;
694
while(true){
514
while (true){
695
515
size_t out_size = strlen(out);
696
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
516
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
697
517
out_size - written));
698
if(ret == -1){
518
if (ret == -1){
699
519
perror("write");
700
520
retval = -1;
701
521
goto mandos_end;
704
524
if(written < out_size){
705
525
continue;
706
526
} else {
707
if(out == mandos_protocol_version){
527
if (out == mandos_protocol_version){
708
528
written = 0;
709
529
out = "\r\n";
710
530
} else {
711
531
break;
712
532
}
713
533
}
714
715
if(quit_now){
716
retval = -1;
717
goto mandos_end;
718
}
719
534
}
720
535
721
536
if(debug){
722
537
fprintf(stderr, "Establishing TLS session with %s\n", ip);
723
538
}
724
539
725
if(quit_now){
726
retval = -1;
727
goto mandos_end;
728
}
729
730
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
731
732
if(quit_now){
733
retval = -1;
734
goto mandos_end;
735
}
736
737
do {
738
ret = gnutls_handshake(session);
739
if(quit_now){
740
retval = -1;
741
goto mandos_end;
742
}
540
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
541
542
do{
543
ret = gnutls_handshake (session);
743
544
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
744
545
745
if(ret != GNUTLS_E_SUCCESS){
546
if (ret != GNUTLS_E_SUCCESS){
746
547
if(debug){
747
548
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
748
gnutls_perror(ret);
549
gnutls_perror (ret);
749
550
}
750
551
retval = -1;
751
552
goto mandos_end;
754
555
/* Read OpenPGP packet that contains the wanted password */
755
556
756
557
if(debug){
757
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
558
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
758
559
ip);
759
560
}
760
561
761
562
while(true){
762
763
if(quit_now){
764
retval = -1;
765
goto mandos_end;
766
}
767
768
buffer_capacity = incbuffer(&buffer, buffer_length,
563
buffer_capacity = adjustbuffer(&buffer, buffer_length,
769
564
buffer_capacity);
770
if(buffer_capacity == 0){
771
perror("incbuffer");
772
retval = -1;
773
goto mandos_end;
774
}
775
776
if(quit_now){
777
retval = -1;
778
goto mandos_end;
779
}
780
781
sret = gnutls_record_recv(session, buffer+buffer_length,
782
BUFFER_SIZE);
783
if(sret == 0){
565
if (buffer_capacity == 0){
566
perror("adjustbuffer");
567
retval = -1;
568
goto mandos_end;
569
}
570
571
ret = gnutls_record_recv(session, buffer+buffer_length,
572
BUFFER_SIZE);
573
if (ret == 0){
784
574
break;
785
575
}
786
if(sret < 0){
787
switch(sret){
576
if (ret < 0){
577
switch(ret){
788
578
case GNUTLS_E_INTERRUPTED:
789
579
case GNUTLS_E_AGAIN:
790
580
break;
791
581
case GNUTLS_E_REHANDSHAKE:
792
do {
793
ret = gnutls_handshake(session);
794
795
if(quit_now){
796
retval = -1;
797
goto mandos_end;
798
}
582
do{
583
ret = gnutls_handshake (session);
799
584
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
800
if(ret < 0){
585
if (ret < 0){
801
586
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
802
gnutls_perror(ret);
587
gnutls_perror (ret);
803
588
retval = -1;
804
589
goto mandos_end;
805
590
}
808
593
fprintf(stderr, "Unknown error while reading data from"
809
594
" encrypted session with Mandos server\n");
810
595
retval = -1;
811
gnutls_bye(session, GNUTLS_SHUT_RDWR);
596
gnutls_bye (session, GNUTLS_SHUT_RDWR);
812
597
goto mandos_end;
813
598
}
814
599
} else {
815
buffer_length += (size_t) sret;
600
buffer_length += (size_t) ret;
816
601
}
817
602
}
818
603
820
605
fprintf(stderr, "Closing TLS session\n");
821
606
}
822
607
823
if(quit_now){
824
retval = -1;
825
goto mandos_end;
826
}
827
828
do {
829
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
830
if(quit_now){
831
retval = -1;
832
goto mandos_end;
833
}
834
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
835
836
if(buffer_length > 0){
837
ssize_t decrypted_buffer_size;
608
gnutls_bye (session, GNUTLS_SHUT_RDWR);
609
610
if (buffer_length > 0){
838
611
decrypted_buffer_size = pgp_packet_decrypt(buffer,
839
612
buffer_length,
840
&decrypted_buffer);
841
if(decrypted_buffer_size >= 0){
842
613
&decrypted_buffer,
614
keydir);
615
if (decrypted_buffer_size >= 0){
843
616
written = 0;
844
617
while(written < (size_t) decrypted_buffer_size){
845
if(quit_now){
846
retval = -1;
847
goto mandos_end;
848
}
849
850
ret = (int)fwrite(decrypted_buffer + written, 1,
851
(size_t)decrypted_buffer_size - written,
852
stdout);
618
ret = (int)fwrite (decrypted_buffer + written, 1,
619
(size_t)decrypted_buffer_size - written,
620
stdout);
853
621
if(ret == 0 and ferror(stdout)){
854
622
if(debug){
855
623
fprintf(stderr, "Error writing encrypted data: %s\n",
864
632
} else {
865
633
retval = -1;
866
634
}
867
} else {
868
retval = -1;
869
635
}
870
636
871
637
/* Shutdown procedure */
872
638
873
639
mandos_end:
874
640
free(buffer);
875
if(tcp_sd >= 0){
876
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
877
}
878
if(ret == -1){
879
perror("close");
880
}
881
gnutls_deinit(session);
882
if(quit_now){
883
retval = -1;
884
}
641
close(tcp_sd);
642
gnutls_deinit (session);
885
643
return retval;
886
644
}
887
645
888
646
static void resolve_callback(AvahiSServiceResolver *r,
889
647
AvahiIfIndex interface,
890
AvahiProtocol proto,
648
AVAHI_GCC_UNUSED AvahiProtocol protocol,
891
649
AvahiResolverEvent event,
892
650
const char *name,
893
651
const char *type,
898
656
AVAHI_GCC_UNUSED AvahiStringList *txt,
899
657
AVAHI_GCC_UNUSED AvahiLookupResultFlags
900
658
flags,
901
AVAHI_GCC_UNUSED void* userdata){
902
assert(r);
659
void* userdata) {
660
mandos_context *mc = userdata;
661
assert(r); /* Spurious warning */
903
662
904
663
/* Called whenever a service has been resolved successfully or
905
664
timed out */
906
665
907
if(quit_now){
908
return;
909
}
910
911
switch(event){
666
switch (event) {
912
667
default:
913
668
case AVAHI_RESOLVER_FAILURE:
914
669
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
915
670
" of type '%s' in domain '%s': %s\n", name, type, domain,
916
avahi_strerror(avahi_server_errno(mc.server)));
671
avahi_strerror(avahi_server_errno(mc->server)));
917
672
break;
918
673
919
674
case AVAHI_RESOLVER_FOUND:
922
677
avahi_address_snprint(ip, sizeof(ip), address);
923
678
if(debug){
924
679
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
925
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
926
ip, (intmax_t)interface, port);
680
PRIu16 ") on port %d\n", name, host_name, ip,
681
interface, port);
927
682
}
928
int ret = start_mandos_communication(ip, port, interface,
929
avahi_proto_to_af(proto));
930
if(ret == 0){
931
avahi_simple_poll_quit(mc.simple_poll);
683
int ret = start_mandos_communication(ip, port, interface, mc);
684
if (ret == 0){
685
exit(EXIT_SUCCESS);
932
686
}
933
687
}
934
688
}
935
689
avahi_s_service_resolver_free(r);
936
690
}
937
691
938
static void browse_callback(AvahiSServiceBrowser *b,
939
AvahiIfIndex interface,
940
AvahiProtocol protocol,
941
AvahiBrowserEvent event,
942
const char *name,
943
const char *type,
944
const char *domain,
945
AVAHI_GCC_UNUSED AvahiLookupResultFlags
946
flags,
947
AVAHI_GCC_UNUSED void* userdata){
948
assert(b);
692
static void browse_callback( AvahiSServiceBrowser *b,
693
AvahiIfIndex interface,
694
AvahiProtocol protocol,
695
AvahiBrowserEvent event,
696
const char *name,
697
const char *type,
698
const char *domain,
699
AVAHI_GCC_UNUSED AvahiLookupResultFlags
700
flags,
701
void* userdata) {
702
mandos_context *mc = userdata;
703
assert(b); /* Spurious warning */
949
704
950
705
/* Called whenever a new services becomes available on the LAN or
951
706
is removed from the LAN */
952
707
953
if(quit_now){
954
return;
955
}
956
957
switch(event){
708
switch (event) {
958
709
default:
959
710
case AVAHI_BROWSER_FAILURE:
960
711
961
712
fprintf(stderr, "(Avahi browser) %s\n",
962
avahi_strerror(avahi_server_errno(mc.server)));
963
avahi_simple_poll_quit(mc.simple_poll);
713
avahi_strerror(avahi_server_errno(mc->server)));
714
avahi_simple_poll_quit(mc->simple_poll);
964
715
return;
965
716
966
717
case AVAHI_BROWSER_NEW:
969
720
the callback function is called the Avahi server will free the
970
721
resolver for us. */
971
722
972
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
973
name, type, domain, protocol, 0,
974
resolve_callback, NULL) == NULL)
723
if (!(avahi_s_service_resolver_new(mc->server, interface,
724
protocol, name, type, domain,
725
AVAHI_PROTO_INET6, 0,
726
resolve_callback, mc)))
975
727
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
976
name, avahi_strerror(avahi_server_errno(mc.server)));
728
name, avahi_strerror(avahi_server_errno(mc->server)));
977
729
break;
978
730
979
731
case AVAHI_BROWSER_REMOVE:
988
740
}
989
741
}
990
742
991
/* stop main loop after sigterm has been called */
992
static void handle_sigterm(int sig){
993
if(quit_now){
994
return;
995
}
996
quit_now = 1;
997
signal_received = sig;
998
int old_errno = errno;
999
if(mc.simple_poll != NULL){
1000
avahi_simple_poll_quit(mc.simple_poll);
1001
}
1002
errno = old_errno;
743
/* Combines file name and path and returns the malloced new
744
string. some sane checks could/should be added */
745
static const char *combinepath(const char *first, const char *second){
746
size_t f_len = strlen(first);
747
size_t s_len = strlen(second);
748
char *tmp = malloc(f_len + s_len + 2);
749
if (tmp == NULL){
750
return NULL;
751
}
752
if(f_len > 0){
753
memcpy(tmp, first, f_len); /* Spurious warning */
754
}
755
tmp[f_len] = '/';
756
if(s_len > 0){
757
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
758
}
759
tmp[f_len + 1 + s_len] = '\0';
760
return tmp;
1003
761
}
1004
762
763
1005
764
int main(int argc, char *argv[]){
1006
AvahiSServiceBrowser *sb = NULL;
1007
int error;
1008
int ret;
1009
intmax_t tmpmax;
1010
char *tmp;
1011
int exitcode = EXIT_SUCCESS;
1012
const char *interface = "eth0";
1013
struct ifreq network;
1014
int sd = -1;
1015
bool take_down_interface = false;
1016
uid_t uid;
1017
gid_t gid;
1018
char *connect_to = NULL;
1019
char tempdir[] = "/tmp/mandosXXXXXX";
1020
bool tempdir_created = false;
1021
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1022
const char *seckey = PATHDIR "/" SECKEY;
1023
const char *pubkey = PATHDIR "/" PUBKEY;
1024
1025
bool gnutls_initialized = false;
1026
bool gpgme_initialized = false;
1027
float delay = 2.5f;
1028
1029
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1030
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1031
1032
uid = getuid();
1033
gid = getgid();
1034
1035
/* Lower any group privileges we might have, just to be safe */
1036
errno = 0;
1037
ret = setgid(gid);
1038
if(ret == -1){
1039
perror("setgid");
1040
}
1041
1042
/* Lower user privileges (temporarily) */
1043
errno = 0;
1044
ret = seteuid(uid);
1045
if(ret == -1){
1046
perror("seteuid");
1047
}
1048
1049
if(quit_now){
1050
goto end;
1051
}
1052
1053
{
1054
struct argp_option options[] = {
1055
{ .name = "debug", .key = 128,
1056
.doc = "Debug mode", .group = 3 },
1057
{ .name = "connect", .key = 'c',
1058
.arg = "ADDRESS:PORT",
1059
.doc = "Connect directly to a specific Mandos server",
1060
.group = 1 },
1061
{ .name = "interface", .key = 'i',
1062
.arg = "NAME",
1063
.doc = "Network interface that will be used to search for"
1064
" Mandos servers",
1065
.group = 1 },
1066
{ .name = "seckey", .key = 's',
1067
.arg = "FILE",
1068
.doc = "OpenPGP secret key file base name",
1069
.group = 1 },
1070
{ .name = "pubkey", .key = 'p',
1071
.arg = "FILE",
1072
.doc = "OpenPGP public key file base name",
1073
.group = 2 },
1074
{ .name = "dh-bits", .key = 129,
1075
.arg = "BITS",
1076
.doc = "Bit length of the prime number used in the"
1077
" Diffie-Hellman key exchange",
1078
.group = 2 },
1079
{ .name = "priority", .key = 130,
1080
.arg = "STRING",
1081
.doc = "GnuTLS priority string for the TLS handshake",
1082
.group = 1 },
1083
{ .name = "delay", .key = 131,
1084
.arg = "SECONDS",
1085
.doc = "Maximum delay to wait for interface startup",
1086
.group = 2 },
1087
{ .name = NULL }
1088
};
1089
1090
error_t parse_opt(int key, char *arg,
1091
struct argp_state *state){
1092
switch(key){
1093
case 128: /* --debug */
1094
debug = true;
1095
break;
1096
case 'c': /* --connect */
1097
connect_to = arg;
1098
break;
1099
case 'i': /* --interface */
1100
interface = arg;
1101
break;
1102
case 's': /* --seckey */
1103
seckey = arg;
1104
break;
1105
case 'p': /* --pubkey */
1106
pubkey = arg;
1107
break;
1108
case 129: /* --dh-bits */
1109
errno = 0;
1110
tmpmax = strtoimax(arg, &tmp, 10);
1111
if(errno != 0 or tmp == arg or *tmp != '\0'
1112
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1113
fprintf(stderr, "Bad number of DH bits\n");
1114
exit(EXIT_FAILURE);
1115
}
1116
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1117
break;
1118
case 130: /* --priority */
1119
mc.priority = arg;
1120
break;
1121
case 131: /* --delay */
1122
errno = 0;
1123
delay = strtof(arg, &tmp);
1124
if(errno != 0 or tmp == arg or *tmp != '\0'){
1125
fprintf(stderr, "Bad delay\n");
1126
exit(EXIT_FAILURE);
1127
}
1128
break;
1129
case ARGP_KEY_ARG:
1130
argp_usage(state);
1131
case ARGP_KEY_END:
1132
break;
1133
default:
1134
return ARGP_ERR_UNKNOWN;
1135
}
1136
return 0;
1137
}
1138
1139
struct argp argp = { .options = options, .parser = parse_opt,
1140
.args_doc = "",
1141
.doc = "Mandos client -- Get and decrypt"
1142
" passwords from a Mandos server" };
1143
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1144
if(ret == ARGP_ERR_UNKNOWN){
1145
fprintf(stderr, "Unknown error while parsing arguments\n");
1146
exitcode = EXIT_FAILURE;
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'){
765
AvahiSServiceBrowser *sb = NULL;
766
int error;
767
int ret;
768
int exitcode = EXIT_SUCCESS;
769
const char *interface = "eth0";
770
struct ifreq network;
771
int sd;
772
uid_t uid;
773
gid_t gid;
774
char *connect_to = NULL;
775
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
776
const char *pubkeyfile = "pubkey.txt";
777
const char *seckeyfile = "seckey.txt";
778
mandos_context mc = { .simple_poll = NULL, .server = NULL,
779
.dh_bits = 1024, .priority = "SECURE256"};
780
bool gnutls_initalized = false;
781
782
{
783
struct argp_option options[] = {
784
{ .name = "debug", .key = 128,
785
.doc = "Debug mode", .group = 3 },
786
{ .name = "connect", .key = 'c',
787
.arg = "IP",
788
.doc = "Connect directly to a sepcified mandos server",
789
.group = 1 },
790
{ .name = "interface", .key = 'i',
791
.arg = "INTERFACE",
792
.doc = "Interface that Avahi will conntect through",
793
.group = 1 },
794
{ .name = "keydir", .key = 'd',
795
.arg = "KEYDIR",
796
.doc = "Directory where the openpgp keyring is",
797
.group = 1 },
798
{ .name = "seckey", .key = 's',
799
.arg = "SECKEY",
800
.doc = "Secret openpgp key for gnutls authentication",
801
.group = 1 },
802
{ .name = "pubkey", .key = 'p',
803
.arg = "PUBKEY",
804
.doc = "Public openpgp key for gnutls authentication",
805
.group = 2 },
806
{ .name = "dh-bits", .key = 129,
807
.arg = "BITS",
808
.doc = "dh-bits to use in gnutls communication",
809
.group = 2 },
810
{ .name = "priority", .key = 130,
811
.arg = "PRIORITY",
812
.doc = "GNUTLS priority", .group = 1 },
813
{ .name = NULL }
814
};
815
816
817
error_t parse_opt (int key, char *arg,
818
struct argp_state *state) {
819
/* Get the INPUT argument from `argp_parse', which we know is
820
a pointer to our plugin list pointer. */
821
switch (key) {
822
case 128:
823
debug = true;
824
break;
825
case 'c':
826
connect_to = arg;
827
break;
828
case 'i':
829
interface = arg;
830
break;
831
case 'd':
832
keydir = arg;
833
break;
834
case 's':
835
seckeyfile = arg;
836
break;
837
case 'p':
838
pubkeyfile = arg;
839
break;
840
case 129:
841
errno = 0;
842
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
843
if (errno){
844
perror("strtol");
845
exit(EXIT_FAILURE);
846
}
847
break;
848
case 130:
849
mc.priority = arg;
850
break;
851
case ARGP_KEY_ARG:
852
argp_usage (state);
853
break;
854
case ARGP_KEY_END:
855
break;
856
default:
857
return ARGP_ERR_UNKNOWN;
858
}
859
return 0;
860
}
861
862
struct argp argp = { .options = options, .parser = parse_opt,
863
.args_doc = "",
864
.doc = "Mandos client -- Get and decrypt"
865
" passwords from mandos server" };
866
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
867
if (ret == ARGP_ERR_UNKNOWN){
868
fprintf(stderr, "Unknown error while parsing arguments\n");
869
exitcode = EXIT_FAILURE;
870
goto end;
871
}
872
}
873
874
pubkeyfile = combinepath(keydir, pubkeyfile);
875
if (pubkeyfile == NULL){
876
perror("combinepath");
877
exitcode = EXIT_FAILURE;
878
goto end;
879
}
880
881
seckeyfile = combinepath(keydir, seckeyfile);
882
if (seckeyfile == NULL){
883
perror("combinepath");
884
exitcode = EXIT_FAILURE;
885
goto end;
886
}
887
888
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
889
if (ret == -1){
890
fprintf(stderr, "init_gnutls_global failed\n");
891
exitcode = EXIT_FAILURE;
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
896
897
/* If the interface is down, bring it up */
898
{
899
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
900
if(sd < 0) {
901
perror("socket");
902
exitcode = EXIT_FAILURE;
903
goto end;
904
}
905
strcpy(network.ifr_name, interface); /* Spurious warning */
906
ret = ioctl(sd, SIOCGIFFLAGS, &network);
907
if(ret == -1){
908
perror("ioctl SIOCGIFFLAGS");
909
exitcode = EXIT_FAILURE;
910
goto end;
911
}
912
if((network.ifr_flags & IFF_UP) == 0){
913
network.ifr_flags |= IFF_UP;
914
ret = ioctl(sd, SIOCSIFFLAGS, &network);
915
if(ret == -1){
916
perror("ioctl SIOCSIFFLAGS");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
close(sd);
922
}
923
924
uid = getuid();
925
gid = getgid();
926
927
ret = setuid(uid);
928
if (ret == -1){
929
perror("setuid");
930
}
931
932
setgid(gid);
933
if (ret == -1){
934
perror("setgid");
935
}
936
1231
937
if_index = (AvahiIfIndex) if_nametoindex(interface);
1232
938
if(if_index == 0){
1233
939
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 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
{
1470
AvahiServerConfig config;
1471
/* Do not publish any local Zeroconf records */
1472
avahi_server_config_init(&config);
1473
config.publish_hinfo = 0;
1474
config.publish_addresses = 0;
1475
config.publish_workstation = 0;
1476
config.publish_domain = 0;
1477
1478
/* 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 */
1484
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
940
exit(EXIT_FAILURE);
941
}
942
943
if(connect_to != NULL){
944
/* Connect directly, do not use Zeroconf */
945
/* (Mainly meant for debugging) */
946
char *address = strrchr(connect_to, ':');
947
if(address == NULL){
948
fprintf(stderr, "No colon in address\n");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
errno = 0;
953
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
954
if(errno){
955
perror("Bad port number");
956
exitcode = EXIT_FAILURE;
957
goto end;
958
}
959
*address = '\0';
960
address = connect_to;
961
ret = start_mandos_communication(address, port, if_index, &mc);
962
if(ret < 0){
963
exitcode = EXIT_FAILURE;
964
} else {
965
exitcode = EXIT_SUCCESS;
966
}
967
goto end;
968
}
969
970
if (not debug){
971
avahi_set_log_function(empty_log);
972
}
973
974
/* Initialize the pseudo-RNG for Avahi */
975
srand((unsigned int) time(NULL));
976
977
/* Allocate main Avahi loop object */
978
mc.simple_poll = avahi_simple_poll_new();
979
if (mc.simple_poll == NULL) {
980
fprintf(stderr, "Avahi: Failed to create simple poll"
981
" object.\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
}
985
986
{
987
AvahiServerConfig config;
988
/* Do not publish any local Zeroconf records */
989
avahi_server_config_init(&config);
990
config.publish_hinfo = 0;
991
config.publish_addresses = 0;
992
config.publish_workstation = 0;
993
config.publish_domain = 0;
994
995
/* Allocate a new server */
996
mc.server = avahi_server_new(avahi_simple_poll_get
997
(mc.simple_poll), &config, NULL,
998
NULL, &error);
999
1000
/* Free the Avahi configuration data */
1001
avahi_server_config_free(&config);
1002
}
1003
1004
/* Check if creating the Avahi server object succeeded */
1005
if (mc.server == NULL) {
1006
fprintf(stderr, "Failed to create Avahi server: %s\n",
1007
avahi_strerror(error));
1008
exitcode = EXIT_FAILURE;
1009
goto end;
1010
}
1011
1012
/* Create the Avahi service browser */
1013
sb = avahi_s_service_browser_new(mc.server, if_index,
1014
AVAHI_PROTO_INET6,
1015
"_mandos._tcp", NULL, 0,
1016
browse_callback, &mc);
1017
if (sb == NULL) {
1018
fprintf(stderr, "Failed to create service browser: %s\n",
1019
avahi_strerror(avahi_server_errno(mc.server)));
1020
exitcode = EXIT_FAILURE;
1021
goto end;
1022
}
1023
1024
/* Run the main loop */
1025
1026
if (debug){
1027
fprintf(stderr, "Starting Avahi loop search\n");
1028
}
1029
1030
avahi_simple_poll_loop(mc.simple_poll);
1031
1522
1032
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 &= ~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 = sigaction(signal_received, &old_sigterm_action, NULL);
1628
if(ret == -1){
1629
perror("sigaction");
1630
}
1631
raise(signal_received);
1632
}
1633
1634
return exitcode;
1033
1034
if (debug){
1035
fprintf(stderr, "%s exiting\n", argv[0]);
1036
}
1037
1038
/* Cleanup things */
1039
if (sb != NULL)
1040
avahi_s_service_browser_free(sb);
1041
1042
if (mc.server != NULL)
1043
avahi_server_free(mc.server);
1044
1045
if (mc.simple_poll != NULL)
1046
avahi_simple_poll_free(mc.simple_poll);
1047
free(pubkeyfile);
1048
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
1054
1055
return exitcode;
1635
1056
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0