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- Committer: Teddy Hogeborn
- Date: 2008-08-17 06:17:10 UTC
- Revision ID: teddy@fukt.bsnet.se-20080817061710-epkw87paysoo9g7w
* mandos-keygen.xml (NOTES): Removed section, since it is
automatically created for footnotes.
automatically created for footnotes.
- files added:
- COPYING
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
plugins.d/password-request.c
1
/***
2
This file is part of avahi.
3
4
avahi is free software; you can redistribute it and/or modify it
5
under the terms of the GNU Lesser General Public License as
6
published by the Free Software Foundation; either version 2.1 of the
7
License, or (at your option) any later version.
8
9
avahi is distributed in the hope that it will be useful, but WITHOUT
10
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12
Public License for more details.
13
14
You should have received a copy of the GNU Lesser General Public
15
License along with avahi; if not, write to the Free Software
16
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17
USA.
18
***/
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
4
*
5
* This program is partly derived from an example program for an Avahi
6
* service browser, downloaded from
7
* <http://avahi.org/browser/examples/core-browse-services.c>. This
8
* includes the following functions: "resolve_callback",
9
* "browse_callback", and parts of "main".
10
*
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
13
*
14
* This program is free software: you can redistribute it and/or
15
* modify it under the terms of the GNU General Public License as
16
* published by the Free Software Foundation, either version 3 of the
17
* License, or (at your option) any later version.
18
*
19
* This program is distributed in the hope that it will be useful, but
20
* WITHOUT ANY WARRANTY; without even the implied warranty of
21
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22
* General Public License for more details.
23
*
24
* You should have received a copy of the GNU General Public License
25
* along with this program. If not, see
26
* <http://www.gnu.org/licenses/>.
27
*
28
* Contact the authors at <mandos@fukt.bsnet.se>.
29
*/
19
30
31
/* Needed by GPGME, specifically gpgme_data_seek() */
20
32
#define _LARGEFILE_SOURCE
21
33
#define _FILE_OFFSET_BITS 64
22
34
23
#include <stdio.h>
24
#include <assert.h>
25
#include <stdlib.h>
26
#include <time.h>
27
#include <net/if.h> /* if_nametoindex */
28
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
39
#include <stdint.h> /* uint16_t, uint32_t */
40
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
44
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t */
51
#include <inttypes.h> /* PRIu16 */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <assert.h> /* assert() */
56
#include <errno.h> /* perror(), errno */
57
#include <time.h> /* time() */
58
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
59
SIOCSIFFLAGS, if_indextoname(),
60
if_nametoindex(), IF_NAMESIZE */
61
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
62
getuid(), getgid(), setuid(),
63
setgid() */
64
#include <netinet/in.h>
65
#include <arpa/inet.h> /* inet_pton(), htons */
66
#include <iso646.h> /* not, and */
67
#include <argp.h> /* struct argp_option, error_t, struct
68
argp_state, struct argp,
69
argp_parse(), ARGP_KEY_ARG,
70
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
71
72
/* Avahi */
73
/* All Avahi types, constants and functions
74
Avahi*, avahi_*,
75
AVAHI_* */
29
76
#include <avahi-core/core.h>
30
77
#include <avahi-core/lookup.h>
31
78
#include <avahi-core/log.h>
33
80
#include <avahi-common/malloc.h>
34
81
#include <avahi-common/error.h>
35
82
36
//mandos client part
37
#include <sys/types.h> /* socket(), setsockopt(), inet_pton() */
38
#include <sys/socket.h> /* socket(), setsockopt(), struct sockaddr_in6, struct in6_addr, inet_pton() */
39
#include <gnutls/gnutls.h> /* ALL GNUTLS STUFF */
40
#include <gnutls/openpgp.h> /* gnutls with openpgp stuff */
41
42
#include <unistd.h> /* close() */
43
#include <netinet/in.h>
44
#include <stdbool.h> /* true */
45
#include <string.h> /* memset */
46
#include <arpa/inet.h> /* inet_pton() */
47
#include <iso646.h> /* not */
48
49
// gpgme
50
#include <errno.h> /* perror() */
51
#include <gpgme.h>
52
53
// getopt long
54
#include <getopt.h>
55
56
#ifndef CERT_ROOT
57
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
58
#endif
59
#define CERTFILE CERT_ROOT "openpgp-client.txt"
60
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
83
/* GnuTLS */
84
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
85
functions:
86
gnutls_*
87
init_gnutls_session(),
88
GNUTLS_* */
89
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
90
GNUTLS_OPENPGP_FMT_BASE64 */
91
92
/* GPGME */
93
#include <gpgme.h> /* All GPGME types, constants and
94
functions:
95
gpgme_*
96
GPGME_PROTOCOL_OpenPGP,
97
GPG_ERR_NO_* */
98
61
99
#define BUFFER_SIZE 256
62
#define DH_BITS 1024
63
100
64
101
bool debug = false;
65
char *interface = "eth0";
102
static const char *keydir = "/conf/conf.d/mandos";
103
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
105
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
66
106
107
/* Used for passing in values through the Avahi callback functions */
67
108
typedef struct {
68
gnutls_session_t session;
109
AvahiSimplePoll *simple_poll;
110
AvahiServer *server;
69
111
gnutls_certificate_credentials_t cred;
112
unsigned int dh_bits;
70
113
gnutls_dh_params_t dh_params;
71
} encrypted_session;
72
73
74
ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){
114
const char *priority;
115
} mandos_context;
116
117
/*
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
120
* "buffer_length" is how much is already used.
121
*/
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
123
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
125
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
126
if (buffer == NULL){
127
return 0;
128
}
129
buffer_capacity += BUFFER_SIZE;
130
}
131
return buffer_capacity;
132
}
133
134
/*
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
137
*/
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
75
142
gpgme_data_t dh_crypto, dh_plain;
76
143
gpgme_ctx_t ctx;
77
144
gpgme_error_t rc;
78
145
ssize_t ret;
79
size_t new_packet_capacity = 0;
80
size_t new_packet_length = 0;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
81
148
gpgme_engine_info_t engine_info;
82
149
83
150
if (debug){
84
fprintf(stderr, "Attempting to decrypt password from gpg packet\n");
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
85
152
}
86
153
87
154
/* Init GPGME */
88
155
gpgme_check_version(NULL);
89
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
156
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
if (rc != GPG_ERR_NO_ERROR){
158
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
161
}
90
162
91
/* Set GPGME home directory */
163
/* Set GPGME home directory for the OpenPGP engine only */
92
164
rc = gpgme_get_engine_info (&engine_info);
93
165
if (rc != GPG_ERR_NO_ERROR){
94
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
104
176
engine_info = engine_info->next;
105
177
}
106
178
if(engine_info == NULL){
107
fprintf(stderr, "Could not set home dir to %s\n", homedir);
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
108
180
return -1;
109
181
}
110
182
111
/* Create new GPGME data buffer from packet buffer */
112
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
183
/* Create new GPGME data buffer from memory cryptotext */
184
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
185
0);
113
186
if (rc != GPG_ERR_NO_ERROR){
114
187
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
115
188
gpgme_strsource(rc), gpgme_strerror(rc));
121
194
if (rc != GPG_ERR_NO_ERROR){
122
195
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
123
196
gpgme_strsource(rc), gpgme_strerror(rc));
197
gpgme_data_release(dh_crypto);
124
198
return -1;
125
199
}
126
200
129
203
if (rc != GPG_ERR_NO_ERROR){
130
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
131
205
gpgme_strsource(rc), gpgme_strerror(rc));
132
return -1;
206
plaintext_length = -1;
207
goto decrypt_end;
133
208
}
134
209
135
/* Decrypt data from the FILE pointer to the plaintext data buffer */
210
/* Decrypt data from the cryptotext data buffer to the plaintext
211
data buffer */
136
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
137
213
if (rc != GPG_ERR_NO_ERROR){
138
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
139
215
gpgme_strsource(rc), gpgme_strerror(rc));
140
return -1;
216
plaintext_length = -1;
217
goto decrypt_end;
141
218
}
142
219
143
220
if(debug){
144
fprintf(stderr, "decryption of gpg packet succeeded\n");
221
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
145
222
}
146
223
147
224
if (debug){
148
225
gpgme_decrypt_result_t result;
149
226
result = gpgme_op_decrypt_result(ctx);
150
227
if (result == NULL){
151
228
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
152
229
} else {
153
fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm);
154
fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage);
230
fprintf(stderr, "Unsupported algorithm: %s\n",
231
result->unsupported_algorithm);
232
fprintf(stderr, "Wrong key usage: %u\n",
233
result->wrong_key_usage);
155
234
if(result->file_name != NULL){
156
235
fprintf(stderr, "File name: %s\n", result->file_name);
157
236
}
163
242
gpgme_pubkey_algo_name(recipient->pubkey_algo));
164
243
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
165
244
fprintf(stderr, "Secret key available: %s\n",
166
recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
245
recipient->status == GPG_ERR_NO_SECKEY
246
? "No" : "Yes");
167
247
recipient = recipient->next;
168
248
}
169
249
}
170
250
}
171
251
}
172
252
173
/* Delete the GPGME FILE pointer cryptotext data buffer */
174
gpgme_data_release(dh_crypto);
175
176
253
/* Seek back to the beginning of the GPGME plaintext data buffer */
177
gpgme_data_seek(dh_plain, 0, SEEK_SET);
178
179
*new_packet = 0;
254
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
255
perror("pgpme_data_seek");
256
plaintext_length = -1;
257
goto decrypt_end;
258
}
259
260
*plaintext = NULL;
180
261
while(true){
181
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
182
*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);
183
if (*new_packet == NULL){
184
perror("realloc");
185
return -1;
186
}
187
new_packet_capacity += BUFFER_SIZE;
262
plaintext_capacity = adjustbuffer(plaintext,
263
(size_t)plaintext_length,
264
plaintext_capacity);
265
if (plaintext_capacity == 0){
266
perror("adjustbuffer");
267
plaintext_length = -1;
268
goto decrypt_end;
188
269
}
189
270
190
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);
271
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
272
BUFFER_SIZE);
191
273
/* Print the data, if any */
192
274
if (ret == 0){
193
/* If password is empty, then a incorrect error will be printed */
275
/* EOF */
194
276
break;
195
277
}
196
278
if(ret < 0){
197
279
perror("gpgme_data_read");
198
return -1;
280
plaintext_length = -1;
281
goto decrypt_end;
199
282
}
200
new_packet_length += ret;
283
plaintext_length += ret;
201
284
}
202
285
203
/* FIXME: check characters before printing to screen so to not print
204
terminal control characters */
205
/* if(debug){ */
206
/* fprintf(stderr, "decrypted password is: "); */
207
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
208
/* fprintf(stderr, "\n"); */
209
/* } */
286
if(debug){
287
fprintf(stderr, "Decrypted password is: ");
288
for(ssize_t i = 0; i < plaintext_length; i++){
289
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
290
}
291
fprintf(stderr, "\n");
292
}
293
294
decrypt_end:
295
296
/* Delete the GPGME cryptotext data buffer */
297
gpgme_data_release(dh_crypto);
210
298
211
299
/* Delete the GPGME plaintext data buffer */
212
300
gpgme_data_release(dh_plain);
213
return new_packet_length;
301
return plaintext_length;
214
302
}
215
303
216
304
static const char * safer_gnutls_strerror (int value) {
220
308
return ret;
221
309
}
222
310
223
void debuggnutls(int level, const char* string){
224
fprintf(stderr, "%s", string);
311
/* GnuTLS log function callback */
312
static void debuggnutls(__attribute__((unused)) int level,
313
const char* string){
314
fprintf(stderr, "GnuTLS: %s", string);
225
315
}
226
316
227
int initgnutls(encrypted_session *es){
228
const char *err;
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfilename,
319
const char *seckeyfilename){
229
320
int ret;
230
321
231
322
if(debug){
232
fprintf(stderr, "Initializing gnutls\n");
323
fprintf(stderr, "Initializing GnuTLS\n");
233
324
}
234
235
325
236
if ((ret = gnutls_global_init ())
237
!= GNUTLS_E_SUCCESS) {
238
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
326
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "GnuTLS global_init: %s\n",
329
safer_gnutls_strerror(ret));
239
330
return -1;
240
331
}
241
332
242
333
if (debug){
334
/* "Use a log level over 10 to enable all debugging options."
335
* - GnuTLS manual
336
*/
243
337
gnutls_global_set_log_level(11);
244
338
gnutls_global_set_log_function(debuggnutls);
245
339
}
246
340
247
248
/* openpgp credentials */
249
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
250
!= GNUTLS_E_SUCCESS) {
251
fprintf (stderr, "memory error: %s\n", safer_gnutls_strerror(ret));
341
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n",
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
252
347
return -1;
253
348
}
254
349
255
350
if(debug){
256
fprintf(stderr, "Attempting to use openpgp certificate %s"
257
" and keyfile %s as gnutls credentials\n", CERTFILE, KEYFILE);
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
353
seckeyfilename);
258
354
}
259
355
260
356
ret = gnutls_certificate_set_openpgp_key_file
261
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
262
if (ret != GNUTLS_E_SUCCESS) {
263
fprintf
264
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
265
ret, CERTFILE, KEYFILE);
266
fprintf(stdout, "The Error is: %s\n",
267
safer_gnutls_strerror(ret));
268
return -1;
269
}
270
271
//Gnutls server initialization
272
if ((ret = gnutls_dh_params_init (&es->dh_params))
273
!= GNUTLS_E_SUCCESS) {
274
fprintf (stderr, "Error in dh parameter initialization: %s\n",
275
safer_gnutls_strerror(ret));
276
return -1;
277
}
278
279
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
280
!= GNUTLS_E_SUCCESS) {
281
fprintf (stderr, "Error in prime generation: %s\n",
282
safer_gnutls_strerror(ret));
283
return -1;
284
}
285
286
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
287
288
// Gnutls session creation
289
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
290
!= GNUTLS_E_SUCCESS){
291
fprintf(stderr, "Error in gnutls session initialization: %s\n",
292
safer_gnutls_strerror(ret));
293
}
294
295
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
296
!= GNUTLS_E_SUCCESS) {
297
fprintf(stderr, "Syntax error at: %s\n", err);
298
fprintf(stderr, "Gnutls error: %s\n",
299
safer_gnutls_strerror(ret));
300
return -1;
301
}
302
303
if ((ret = gnutls_credentials_set
304
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
305
!= GNUTLS_E_SUCCESS) {
306
fprintf(stderr, "Error setting a credentials set: %s\n",
307
safer_gnutls_strerror(ret));
308
return -1;
309
}
310
357
(mc->cred, pubkeyfilename, seckeyfilename,
358
GNUTLS_OPENPGP_FMT_BASE64);
359
if (ret != GNUTLS_E_SUCCESS) {
360
fprintf(stderr,
361
"Error[%d] while reading the OpenPGP key pair ('%s',"
362
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
363
fprintf(stdout, "The GnuTLS error is: %s\n",
364
safer_gnutls_strerror(ret));
365
goto globalfail;
366
}
367
368
/* GnuTLS server initialization */
369
ret = gnutls_dh_params_init(&mc->dh_params);
370
if (ret != GNUTLS_E_SUCCESS) {
371
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
372
" %s\n", safer_gnutls_strerror(ret));
373
goto globalfail;
374
}
375
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
376
if (ret != GNUTLS_E_SUCCESS) {
377
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
378
safer_gnutls_strerror(ret));
379
goto globalfail;
380
}
381
382
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
383
384
return 0;
385
386
globalfail:
387
388
gnutls_certificate_free_credentials(mc->cred);
389
gnutls_global_deinit();
390
return -1;
391
392
}
393
394
static int init_gnutls_session(mandos_context *mc,
395
gnutls_session_t *session){
396
int ret;
397
/* GnuTLS session creation */
398
ret = gnutls_init(session, GNUTLS_SERVER);
399
if (ret != GNUTLS_E_SUCCESS){
400
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
401
safer_gnutls_strerror(ret));
402
}
403
404
{
405
const char *err;
406
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf(stderr, "Syntax error at: %s\n", err);
409
fprintf(stderr, "GnuTLS error: %s\n",
410
safer_gnutls_strerror(ret));
411
gnutls_deinit (*session);
412
return -1;
413
}
414
}
415
416
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
417
mc->cred);
418
if (ret != GNUTLS_E_SUCCESS) {
419
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
420
safer_gnutls_strerror(ret));
421
gnutls_deinit (*session);
422
return -1;
423
}
424
311
425
/* ignore client certificate if any. */
312
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
426
gnutls_certificate_server_set_request (*session,
427
GNUTLS_CERT_IGNORE);
313
428
314
gnutls_dh_set_prime_bits (es->session, DH_BITS);
429
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
315
430
316
431
return 0;
317
432
}
318
433
319
void empty_log(AvahiLogLevel level, const char *txt){}
434
/* Avahi log function callback */
435
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
436
__attribute__((unused)) const char *txt){}
320
437
321
int start_mandos_communcation(char *ip, uint16_t port){
438
/* Called when a Mandos server is found */
439
static int start_mandos_communication(const char *ip, uint16_t port,
440
AvahiIfIndex if_index,
441
mandos_context *mc){
322
442
int ret, tcp_sd;
323
struct sockaddr_in6 to;
324
struct in6_addr ip_addr;
325
encrypted_session es;
443
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
326
444
char *buffer = NULL;
327
445
char *decrypted_buffer;
328
446
size_t buffer_length = 0;
329
447
size_t buffer_capacity = 0;
330
448
ssize_t decrypted_buffer_size;
449
size_t written;
331
450
int retval = 0;
332
451
char interface[IF_NAMESIZE];
452
gnutls_session_t session;
453
454
ret = init_gnutls_session (mc, &session);
455
if (ret != 0){
456
return -1;
457
}
458
333
459
if(debug){
334
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
460
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
461
"\n", ip, port);
335
462
}
336
463
337
464
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
341
468
}
342
469
343
470
if(debug){
471
if(if_indextoname((unsigned int)if_index, interface) == NULL){
472
perror("if_indextoname");
473
return -1;
474
}
344
475
fprintf(stderr, "Binding to interface %s\n", interface);
345
476
}
346
347
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
348
if(tcp_sd < 0) {
349
perror("setsockopt bindtodevice");
350
return -1;
351
}
352
477
353
memset(&to,0,sizeof(to));
354
to.sin6_family = AF_INET6;
355
ret = inet_pton(AF_INET6, ip, &ip_addr);
478
memset(&to, 0, sizeof(to)); /* Spurious warning */
479
to.in6.sin6_family = AF_INET6;
480
/* It would be nice to have a way to detect if we were passed an
481
IPv4 address here. Now we assume an IPv6 address. */
482
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
356
483
if (ret < 0 ){
357
484
perror("inet_pton");
358
485
return -1;
359
}
486
}
360
487
if(ret == 0){
361
488
fprintf(stderr, "Bad address: %s\n", ip);
362
489
return -1;
363
490
}
364
to.sin6_port = htons(port);
365
to.sin6_scope_id = if_nametoindex(interface);
366
491
to.in6.sin6_port = htons(port); /* Spurious warning */
492
493
to.in6.sin6_scope_id = (uint32_t)if_index;
494
367
495
if(debug){
368
fprintf(stderr, "Connection to: %s\n", ip);
496
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
497
port);
498
char addrstr[INET6_ADDRSTRLEN] = "";
499
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
500
sizeof(addrstr)) == NULL){
501
perror("inet_ntop");
502
} else {
503
if(strcmp(addrstr, ip) != 0){
504
fprintf(stderr, "Canonical address form: %s\n", addrstr);
505
}
506
}
369
507
}
370
508
371
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
509
ret = connect(tcp_sd, &to.in, sizeof(to));
372
510
if (ret < 0){
373
511
perror("connect");
374
512
return -1;
375
513
}
376
377
ret = initgnutls (&es);
378
if (ret != 0){
379
retval = -1;
380
return -1;
381
}
382
383
384
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
385
514
515
const char *out = mandos_protocol_version;
516
written = 0;
517
while (true){
518
size_t out_size = strlen(out);
519
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
520
out_size - written));
521
if (ret == -1){
522
perror("write");
523
retval = -1;
524
goto mandos_end;
525
}
526
written += (size_t)ret;
527
if(written < out_size){
528
continue;
529
} else {
530
if (out == mandos_protocol_version){
531
written = 0;
532
out = "\r\n";
533
} else {
534
break;
535
}
536
}
537
}
538
386
539
if(debug){
387
fprintf(stderr, "Establishing tls session with %s\n", ip);
540
fprintf(stderr, "Establishing TLS session with %s\n", ip);
388
541
}
542
543
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
389
544
390
391
ret = gnutls_handshake (es.session);
545
do{
546
ret = gnutls_handshake (session);
547
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
392
548
393
549
if (ret != GNUTLS_E_SUCCESS){
394
fprintf(stderr, "\n*** Handshake failed ***\n");
395
gnutls_perror (ret);
550
if(debug){
551
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
552
gnutls_perror (ret);
553
}
396
554
retval = -1;
397
goto exit;
555
goto mandos_end;
398
556
}
399
400
//Retrieve gpg packet that contains the wanted password
401
557
558
/* Read OpenPGP packet that contains the wanted password */
559
402
560
if(debug){
403
fprintf(stderr, "Retrieving pgp encrypted password from %s\n", ip);
561
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
562
ip);
404
563
}
405
564
406
565
while(true){
407
if (buffer_length + BUFFER_SIZE > buffer_capacity){
408
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
409
if (buffer == NULL){
410
perror("realloc");
411
goto exit;
412
}
413
buffer_capacity += BUFFER_SIZE;
566
buffer_capacity = adjustbuffer(&buffer, buffer_length,
567
buffer_capacity);
568
if (buffer_capacity == 0){
569
perror("adjustbuffer");
570
retval = -1;
571
goto mandos_end;
414
572
}
415
573
416
ret = gnutls_record_recv
417
(es.session, buffer+buffer_length, BUFFER_SIZE);
574
ret = gnutls_record_recv(session, buffer+buffer_length,
575
BUFFER_SIZE);
418
576
if (ret == 0){
419
577
break;
420
578
}
424
582
case GNUTLS_E_AGAIN:
425
583
break;
426
584
case GNUTLS_E_REHANDSHAKE:
427
ret = gnutls_handshake (es.session);
585
do{
586
ret = gnutls_handshake (session);
587
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
428
588
if (ret < 0){
429
fprintf(stderr, "\n*** Handshake failed ***\n");
589
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
430
590
gnutls_perror (ret);
431
591
retval = -1;
432
goto exit;
592
goto mandos_end;
433
593
}
434
594
break;
435
595
default:
436
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
596
fprintf(stderr, "Unknown error while reading data from"
597
" encrypted session with Mandos server\n");
437
598
retval = -1;
438
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
439
goto exit;
599
gnutls_bye (session, GNUTLS_SHUT_RDWR);
600
goto mandos_end;
440
601
}
441
602
} else {
442
buffer_length += ret;
603
buffer_length += (size_t) ret;
443
604
}
444
605
}
445
606
607
if(debug){
608
fprintf(stderr, "Closing TLS session\n");
609
}
610
611
gnutls_bye (session, GNUTLS_SHUT_RDWR);
612
446
613
if (buffer_length > 0){
447
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) >= 0){
448
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
614
decrypted_buffer_size = pgp_packet_decrypt(buffer,
615
buffer_length,
616
&decrypted_buffer,
617
keydir);
618
if (decrypted_buffer_size >= 0){
619
written = 0;
620
while(written < (size_t) decrypted_buffer_size){
621
ret = (int)fwrite (decrypted_buffer + written, 1,
622
(size_t)decrypted_buffer_size - written,
623
stdout);
624
if(ret == 0 and ferror(stdout)){
625
if(debug){
626
fprintf(stderr, "Error writing encrypted data: %s\n",
627
strerror(errno));
628
}
629
retval = -1;
630
break;
631
}
632
written += (size_t)ret;
633
}
449
634
free(decrypted_buffer);
450
635
} else {
451
636
retval = -1;
452
637
}
453
638
}
454
455
//shutdown procedure
456
457
if(debug){
458
fprintf(stderr, "Closing tls session\n");
459
}
460
639
640
/* Shutdown procedure */
641
642
mandos_end:
461
643
free(buffer);
462
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
463
exit:
464
644
close(tcp_sd);
465
gnutls_deinit (es.session);
466
gnutls_certificate_free_credentials (es.cred);
467
gnutls_global_deinit ();
645
gnutls_deinit (session);
468
646
return retval;
469
647
}
470
648
471
static AvahiSimplePoll *simple_poll = NULL;
472
static AvahiServer *server = NULL;
473
474
static void resolve_callback(
475
AvahiSServiceResolver *r,
476
AVAHI_GCC_UNUSED AvahiIfIndex interface,
477
AVAHI_GCC_UNUSED AvahiProtocol protocol,
478
AvahiResolverEvent event,
479
const char *name,
480
const char *type,
481
const char *domain,
482
const char *host_name,
483
const AvahiAddress *address,
484
uint16_t port,
485
AvahiStringList *txt,
486
AvahiLookupResultFlags flags,
487
AVAHI_GCC_UNUSED void* userdata) {
488
489
assert(r);
490
491
/* Called whenever a service has been resolved successfully or timed out */
492
493
switch (event) {
494
case AVAHI_RESOLVER_FAILURE:
495
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, avahi_strerror(avahi_server_errno(server)));
496
break;
497
498
case AVAHI_RESOLVER_FOUND: {
499
char ip[AVAHI_ADDRESS_STR_MAX];
500
avahi_address_snprint(ip, sizeof(ip), address);
501
if(debug){
502
fprintf(stderr, "Mandos server found at %s on port %d\n", ip, port);
503
}
504
int ret = start_mandos_communcation(ip, port);
505
if (ret == 0){
506
exit(EXIT_SUCCESS);
507
} else {
508
exit(EXIT_FAILURE);
509
}
510
}
511
}
512
avahi_s_service_resolver_free(r);
513
}
514
515
static void browse_callback(
516
AvahiSServiceBrowser *b,
517
AvahiIfIndex interface,
518
AvahiProtocol protocol,
519
AvahiBrowserEvent event,
520
const char *name,
521
const char *type,
522
const char *domain,
523
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
524
void* userdata) {
525
526
AvahiServer *s = userdata;
527
assert(b);
528
529
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
530
531
switch (event) {
532
533
case AVAHI_BROWSER_FAILURE:
534
535
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
536
avahi_simple_poll_quit(simple_poll);
537
return;
538
539
case AVAHI_BROWSER_NEW:
540
/* We ignore the returned resolver object. In the callback
541
function we free it. If the server is terminated before
542
the callback function is called the server will free
543
the resolver for us. */
544
545
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
546
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
547
548
break;
549
550
case AVAHI_BROWSER_REMOVE:
551
break;
552
553
case AVAHI_BROWSER_ALL_FOR_NOW:
554
case AVAHI_BROWSER_CACHE_EXHAUSTED:
555
break;
556
}
557
}
558
559
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
560
AvahiServerConfig config;
649
static void resolve_callback(AvahiSServiceResolver *r,
650
AvahiIfIndex interface,
651
AVAHI_GCC_UNUSED AvahiProtocol protocol,
652
AvahiResolverEvent event,
653
const char *name,
654
const char *type,
655
const char *domain,
656
const char *host_name,
657
const AvahiAddress *address,
658
uint16_t port,
659
AVAHI_GCC_UNUSED AvahiStringList *txt,
660
AVAHI_GCC_UNUSED AvahiLookupResultFlags
661
flags,
662
void* userdata) {
663
mandos_context *mc = userdata;
664
assert(r); /* Spurious warning */
665
666
/* Called whenever a service has been resolved successfully or
667
timed out */
668
669
switch (event) {
670
default:
671
case AVAHI_RESOLVER_FAILURE:
672
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
673
" of type '%s' in domain '%s': %s\n", name, type, domain,
674
avahi_strerror(avahi_server_errno(mc->server)));
675
break;
676
677
case AVAHI_RESOLVER_FOUND:
678
{
679
char ip[AVAHI_ADDRESS_STR_MAX];
680
avahi_address_snprint(ip, sizeof(ip), address);
681
if(debug){
682
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
683
PRIu16 ") on port %d\n", name, host_name, ip,
684
interface, port);
685
}
686
int ret = start_mandos_communication(ip, port, interface, mc);
687
if (ret == 0){
688
avahi_simple_poll_quit(mc->simple_poll);
689
}
690
}
691
}
692
avahi_s_service_resolver_free(r);
693
}
694
695
static void browse_callback( AvahiSServiceBrowser *b,
696
AvahiIfIndex interface,
697
AvahiProtocol protocol,
698
AvahiBrowserEvent event,
699
const char *name,
700
const char *type,
701
const char *domain,
702
AVAHI_GCC_UNUSED AvahiLookupResultFlags
703
flags,
704
void* userdata) {
705
mandos_context *mc = userdata;
706
assert(b); /* Spurious warning */
707
708
/* Called whenever a new services becomes available on the LAN or
709
is removed from the LAN */
710
711
switch (event) {
712
default:
713
case AVAHI_BROWSER_FAILURE:
714
715
fprintf(stderr, "(Avahi browser) %s\n",
716
avahi_strerror(avahi_server_errno(mc->server)));
717
avahi_simple_poll_quit(mc->simple_poll);
718
return;
719
720
case AVAHI_BROWSER_NEW:
721
/* We ignore the returned Avahi resolver object. In the callback
722
function we free it. If the Avahi server is terminated before
723
the callback function is called the Avahi server will free the
724
resolver for us. */
725
726
if (!(avahi_s_service_resolver_new(mc->server, interface,
727
protocol, name, type, domain,
728
AVAHI_PROTO_INET6, 0,
729
resolve_callback, mc)))
730
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
731
name, avahi_strerror(avahi_server_errno(mc->server)));
732
break;
733
734
case AVAHI_BROWSER_REMOVE:
735
break;
736
737
case AVAHI_BROWSER_ALL_FOR_NOW:
738
case AVAHI_BROWSER_CACHE_EXHAUSTED:
739
if(debug){
740
fprintf(stderr, "No Mandos server found, still searching...\n");
741
}
742
break;
743
}
744
}
745
746
/* Combines file name and path and returns the malloced new
747
string. some sane checks could/should be added */
748
static char *combinepath(const char *first, const char *second){
749
char *tmp;
750
int ret = asprintf(&tmp, "%s/%s", first, second);
751
if(ret < 0){
752
return NULL;
753
}
754
return tmp;
755
}
756
757
758
int main(int argc, char *argv[]){
561
759
AvahiSServiceBrowser *sb = NULL;
562
760
int error;
563
761
int ret;
564
int returncode = EXIT_SUCCESS;
565
566
while (true){
567
static struct option long_options[] = {
568
{"debug", no_argument, (int *)&debug, 1},
569
{"interface", required_argument, 0, 'i'},
570
{0, 0, 0, 0} };
571
572
int option_index = 0;
573
ret = getopt_long (argc, argv, "i:", long_options, &option_index);
574
575
if (ret == -1){
576
break;
577
}
578
579
switch(ret){
580
case 0:
581
break;
582
case 'i':
583
interface = optarg;
584
break;
585
default:
586
exit(EXIT_FAILURE);
587
}
762
int exitcode = EXIT_SUCCESS;
763
const char *interface = "eth0";
764
struct ifreq network;
765
int sd;
766
uid_t uid;
767
gid_t gid;
768
char *connect_to = NULL;
769
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
770
char *pubkeyfilename = NULL;
771
char *seckeyfilename = NULL;
772
const char *pubkeyname = "pubkey.txt";
773
const char *seckeyname = "seckey.txt";
774
mandos_context mc = { .simple_poll = NULL, .server = NULL,
775
.dh_bits = 1024, .priority = "SECURE256"};
776
bool gnutls_initalized = false;
777
778
{
779
struct argp_option options[] = {
780
{ .name = "debug", .key = 128,
781
.doc = "Debug mode", .group = 3 },
782
{ .name = "connect", .key = 'c',
783
.arg = "IP",
784
.doc = "Connect directly to a sepcified mandos server",
785
.group = 1 },
786
{ .name = "interface", .key = 'i',
787
.arg = "INTERFACE",
788
.doc = "Interface that Avahi will conntect through",
789
.group = 1 },
790
{ .name = "keydir", .key = 'd',
791
.arg = "KEYDIR",
792
.doc = "Directory where the openpgp keyring is",
793
.group = 1 },
794
{ .name = "seckey", .key = 's',
795
.arg = "SECKEY",
796
.doc = "Secret openpgp key for gnutls authentication",
797
.group = 1 },
798
{ .name = "pubkey", .key = 'p',
799
.arg = "PUBKEY",
800
.doc = "Public openpgp key for gnutls authentication",
801
.group = 2 },
802
{ .name = "dh-bits", .key = 129,
803
.arg = "BITS",
804
.doc = "dh-bits to use in gnutls communication",
805
.group = 2 },
806
{ .name = "priority", .key = 130,
807
.arg = "PRIORITY",
808
.doc = "GNUTLS priority", .group = 1 },
809
{ .name = NULL }
810
};
811
812
813
error_t parse_opt (int key, char *arg,
814
struct argp_state *state) {
815
/* Get the INPUT argument from `argp_parse', which we know is
816
a pointer to our plugin list pointer. */
817
switch (key) {
818
case 128:
819
debug = true;
820
break;
821
case 'c':
822
connect_to = arg;
823
break;
824
case 'i':
825
interface = arg;
826
break;
827
case 'd':
828
keydir = arg;
829
break;
830
case 's':
831
seckeyname = arg;
832
break;
833
case 'p':
834
pubkeyname = arg;
835
break;
836
case 129:
837
errno = 0;
838
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
839
if (errno){
840
perror("strtol");
841
exit(EXIT_FAILURE);
842
}
843
break;
844
case 130:
845
mc.priority = arg;
846
break;
847
case ARGP_KEY_ARG:
848
argp_usage (state);
849
case ARGP_KEY_END:
850
break;
851
default:
852
return ARGP_ERR_UNKNOWN;
853
}
854
return 0;
855
}
856
857
struct argp argp = { .options = options, .parser = parse_opt,
858
.args_doc = "",
859
.doc = "Mandos client -- Get and decrypt"
860
" passwords from mandos server" };
861
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
862
if (ret == ARGP_ERR_UNKNOWN){
863
fprintf(stderr, "Unknown error while parsing arguments\n");
864
exitcode = EXIT_FAILURE;
865
goto end;
866
}
867
}
868
869
pubkeyfilename = combinepath(keydir, pubkeyname);
870
if (pubkeyfilename == NULL){
871
perror("combinepath");
872
exitcode = EXIT_FAILURE;
873
goto end;
874
}
875
876
seckeyfilename = combinepath(keydir, seckeyname);
877
if (seckeyfilename == NULL){
878
perror("combinepath");
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
883
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
884
if (ret == -1){
885
fprintf(stderr, "init_gnutls_global failed\n");
886
exitcode = EXIT_FAILURE;
887
goto end;
888
} else {
889
gnutls_initalized = true;
890
}
891
892
/* If the interface is down, bring it up */
893
{
894
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
895
if(sd < 0) {
896
perror("socket");
897
exitcode = EXIT_FAILURE;
898
goto end;
899
}
900
strcpy(network.ifr_name, interface); /* Spurious warning */
901
ret = ioctl(sd, SIOCGIFFLAGS, &network);
902
if(ret == -1){
903
perror("ioctl SIOCGIFFLAGS");
904
exitcode = EXIT_FAILURE;
905
goto end;
906
}
907
if((network.ifr_flags & IFF_UP) == 0){
908
network.ifr_flags |= IFF_UP;
909
ret = ioctl(sd, SIOCSIFFLAGS, &network);
910
if(ret == -1){
911
perror("ioctl SIOCSIFFLAGS");
912
exitcode = EXIT_FAILURE;
913
goto end;
914
}
915
}
916
close(sd);
917
}
918
919
uid = getuid();
920
gid = getgid();
921
922
ret = setuid(uid);
923
if (ret == -1){
924
perror("setuid");
925
}
926
927
setgid(gid);
928
if (ret == -1){
929
perror("setgid");
930
}
931
932
if_index = (AvahiIfIndex) if_nametoindex(interface);
933
if(if_index == 0){
934
fprintf(stderr, "No such interface: \"%s\"\n", interface);
935
exit(EXIT_FAILURE);
936
}
937
938
if(connect_to != NULL){
939
/* Connect directly, do not use Zeroconf */
940
/* (Mainly meant for debugging) */
941
char *address = strrchr(connect_to, ':');
942
if(address == NULL){
943
fprintf(stderr, "No colon in address\n");
944
exitcode = EXIT_FAILURE;
945
goto end;
946
}
947
errno = 0;
948
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
949
if(errno){
950
perror("Bad port number");
951
exitcode = EXIT_FAILURE;
952
goto end;
953
}
954
*address = '\0';
955
address = connect_to;
956
ret = start_mandos_communication(address, port, if_index, &mc);
957
if(ret < 0){
958
exitcode = EXIT_FAILURE;
959
} else {
960
exitcode = EXIT_SUCCESS;
961
}
962
goto end;
588
963
}
589
964
590
965
if (not debug){
591
966
avahi_set_log_function(empty_log);
592
967
}
593
968
594
/* Initialize the psuedo-RNG */
595
srand(time(NULL));
596
597
/* Allocate main loop object */
598
if (!(simple_poll = avahi_simple_poll_new())) {
599
fprintf(stderr, "Failed to create simple poll object.\n");
600
601
goto exit;
602
}
603
604
/* Do not publish any local records */
605
avahi_server_config_init(&config);
606
config.publish_hinfo = 0;
607
config.publish_addresses = 0;
608
config.publish_workstation = 0;
609
config.publish_domain = 0;
610
611
/* Allocate a new server */
612
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
613
614
/* Free the configuration data */
615
avahi_server_config_free(&config);
616
617
/* Check if creating the server object succeeded */
618
if (!server) {
619
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
620
returncode = EXIT_FAILURE;
621
goto exit;
622
}
623
624
/* Create the service browser */
625
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
626
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
627
returncode = EXIT_FAILURE;
628
goto exit;
969
/* Initialize the pseudo-RNG for Avahi */
970
srand((unsigned int) time(NULL));
971
972
/* Allocate main Avahi loop object */
973
mc.simple_poll = avahi_simple_poll_new();
974
if (mc.simple_poll == NULL) {
975
fprintf(stderr, "Avahi: Failed to create simple poll"
976
" object.\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
}
980
981
{
982
AvahiServerConfig config;
983
/* Do not publish any local Zeroconf records */
984
avahi_server_config_init(&config);
985
config.publish_hinfo = 0;
986
config.publish_addresses = 0;
987
config.publish_workstation = 0;
988
config.publish_domain = 0;
989
990
/* Allocate a new server */
991
mc.server = avahi_server_new(avahi_simple_poll_get
992
(mc.simple_poll), &config, NULL,
993
NULL, &error);
994
995
/* Free the Avahi configuration data */
996
avahi_server_config_free(&config);
997
}
998
999
/* Check if creating the Avahi server object succeeded */
1000
if (mc.server == NULL) {
1001
fprintf(stderr, "Failed to create Avahi server: %s\n",
1002
avahi_strerror(error));
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
1007
/* Create the Avahi service browser */
1008
sb = avahi_s_service_browser_new(mc.server, if_index,
1009
AVAHI_PROTO_INET6,
1010
"_mandos._tcp", NULL, 0,
1011
browse_callback, &mc);
1012
if (sb == NULL) {
1013
fprintf(stderr, "Failed to create service browser: %s\n",
1014
avahi_strerror(avahi_server_errno(mc.server)));
1015
exitcode = EXIT_FAILURE;
1016
goto end;
629
1017
}
630
1018
631
1019
/* Run the main loop */
632
1020
633
1021
if (debug){
634
fprintf(stderr, "Starting avahi loop search\n");
1022
fprintf(stderr, "Starting Avahi loop search\n");
635
1023
}
636
1024
637
avahi_simple_poll_loop(simple_poll);
1025
avahi_simple_poll_loop(mc.simple_poll);
638
1026
639
exit:
1027
end:
640
1028
641
1029
if (debug){
642
1030
fprintf(stderr, "%s exiting\n", argv[0]);
643
1031
}
644
1032
645
1033
/* Cleanup things */
646
if (sb)
1034
if (sb != NULL)
647
1035
avahi_s_service_browser_free(sb);
648
1036
649
if (server)
650
avahi_server_free(server);
651
652
if (simple_poll)
653
avahi_simple_poll_free(simple_poll);
654
655
return returncode;
1037
if (mc.server != NULL)
1038
avahi_server_free(mc.server);
1039
1040
if (mc.simple_poll != NULL)
1041
avahi_simple_poll_free(mc.simple_poll);
1042
free(pubkeyfilename);
1043
free(seckeyfilename);
1044
1045
if (gnutls_initalized){
1046
gnutls_certificate_free_credentials(mc.cred);
1047
gnutls_global_deinit ();
1048
}
1049
1050
return exitcode;
656
1051
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0