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- Committer: Teddy Hogeborn
- Date: 2008-08-20 00:35:41 UTC
- Revision ID: teddy@fukt.bsnet.se-20080820003541-zxymabnc6yfj8y7t
* mandos-keygen.xml (SEE ALSO): Remove "and".
* mandos.conf.xml (SEE ALSO): New section.
* mandos.xml (SEE ALSO): Changed man page references to a comma-
separated list, as per man-pages(7). Added
reference to sh(1).
* mandos.conf.xml (SEE ALSO): New section.
* mandos.xml (SEE ALSO): Changed man page references to a comma-
separated list, as per man-pages(7). Added
reference to sh(1).
- 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
54
#ifndef CERT_ROOT
55
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
56
#endif
57
#define CERTFILE CERT_ROOT "openpgp-client.txt"
58
#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
59
99
#define BUFFER_SIZE 256
60
#define DH_BITS 1024
61
100
62
101
bool debug = false;
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>";
63
106
107
/* Used for passing in values through the Avahi callback functions */
64
108
typedef struct {
65
gnutls_session_t session;
109
AvahiSimplePoll *simple_poll;
110
AvahiServer *server;
66
111
gnutls_certificate_credentials_t cred;
112
unsigned int dh_bits;
67
113
gnutls_dh_params_t dh_params;
68
} encrypted_session;
69
70
71
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){
72
142
gpgme_data_t dh_crypto, dh_plain;
73
143
gpgme_ctx_t ctx;
74
144
gpgme_error_t rc;
75
145
ssize_t ret;
76
size_t new_packet_capacity = 0;
77
size_t new_packet_length = 0;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
78
148
gpgme_engine_info_t engine_info;
79
149
80
150
if (debug){
81
fprintf(stderr, "Attempting to decrypt password from gpg packet\n");
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
82
152
}
83
153
84
154
/* Init GPGME */
85
155
gpgme_check_version(NULL);
86
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
}
87
162
88
/* Set GPGME home directory */
163
/* Set GPGME home directory for the OpenPGP engine only */
89
164
rc = gpgme_get_engine_info (&engine_info);
90
165
if (rc != GPG_ERR_NO_ERROR){
91
166
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
101
176
engine_info = engine_info->next;
102
177
}
103
178
if(engine_info == NULL){
104
fprintf(stderr, "Could not set home dir to %s\n", homedir);
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
105
180
return -1;
106
181
}
107
182
108
/* Create new GPGME data buffer from packet buffer */
109
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);
110
186
if (rc != GPG_ERR_NO_ERROR){
111
187
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
112
188
gpgme_strsource(rc), gpgme_strerror(rc));
118
194
if (rc != GPG_ERR_NO_ERROR){
119
195
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
120
196
gpgme_strsource(rc), gpgme_strerror(rc));
197
gpgme_data_release(dh_crypto);
121
198
return -1;
122
199
}
123
200
126
203
if (rc != GPG_ERR_NO_ERROR){
127
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
128
205
gpgme_strsource(rc), gpgme_strerror(rc));
129
return -1;
206
plaintext_length = -1;
207
goto decrypt_end;
130
208
}
131
209
132
/* 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 */
133
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
134
213
if (rc != GPG_ERR_NO_ERROR){
135
214
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
136
215
gpgme_strsource(rc), gpgme_strerror(rc));
137
return -1;
216
plaintext_length = -1;
217
goto decrypt_end;
138
218
}
139
219
140
220
if(debug){
141
fprintf(stderr, "decryption of gpg packet succeeded\n");
221
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
142
222
}
143
223
144
224
if (debug){
145
225
gpgme_decrypt_result_t result;
146
226
result = gpgme_op_decrypt_result(ctx);
147
227
if (result == NULL){
148
228
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
149
229
} else {
150
fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm);
151
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);
152
234
if(result->file_name != NULL){
153
235
fprintf(stderr, "File name: %s\n", result->file_name);
154
236
}
160
242
gpgme_pubkey_algo_name(recipient->pubkey_algo));
161
243
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
162
244
fprintf(stderr, "Secret key available: %s\n",
163
recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes");
245
recipient->status == GPG_ERR_NO_SECKEY
246
? "No" : "Yes");
164
247
recipient = recipient->next;
165
248
}
166
249
}
167
250
}
168
251
}
169
252
170
/* Delete the GPGME FILE pointer cryptotext data buffer */
171
gpgme_data_release(dh_crypto);
172
173
253
/* Seek back to the beginning of the GPGME plaintext data buffer */
174
gpgme_data_seek(dh_plain, 0, SEEK_SET);
175
176
*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;
177
261
while(true){
178
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
179
*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);
180
if (*new_packet == NULL){
181
perror("realloc");
182
return -1;
183
}
184
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;
185
269
}
186
270
187
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);
188
273
/* Print the data, if any */
189
274
if (ret == 0){
190
/* If password is empty, then a incorrect error will be printed */
275
/* EOF */
191
276
break;
192
277
}
193
278
if(ret < 0){
194
279
perror("gpgme_data_read");
195
return -1;
280
plaintext_length = -1;
281
goto decrypt_end;
196
282
}
197
new_packet_length += ret;
283
plaintext_length += ret;
198
284
}
199
285
200
286
if(debug){
201
fprintf(stderr, "decrypted password is: %s\n", *new_packet);
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");
202
292
}
203
204
/* Delete the GPGME plaintext data buffer */
293
294
decrypt_end:
295
296
/* Delete the GPGME cryptotext data buffer */
297
gpgme_data_release(dh_crypto);
298
299
/* Delete the GPGME plaintext data buffer */
205
300
gpgme_data_release(dh_plain);
206
return new_packet_length;
301
return plaintext_length;
207
302
}
208
303
209
304
static const char * safer_gnutls_strerror (int value) {
210
const char *ret = gnutls_strerror (value);
305
const char *ret = gnutls_strerror (value); /* Spurious warning */
211
306
if (ret == NULL)
212
307
ret = "(unknown)";
213
308
return ret;
214
309
}
215
310
216
void debuggnutls(int level, const char* string){
217
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);
218
315
}
219
316
220
int initgnutls(encrypted_session *es){
221
const char *err;
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfilename,
319
const char *seckeyfilename){
222
320
int ret;
223
321
224
322
if(debug){
225
fprintf(stderr, "Initializing gnutls\n");
323
fprintf(stderr, "Initializing GnuTLS\n");
226
324
}
227
228
325
229
if ((ret = gnutls_global_init ())
230
!= GNUTLS_E_SUCCESS) {
231
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));
232
330
return -1;
233
331
}
234
332
235
333
if (debug){
334
/* "Use a log level over 10 to enable all debugging options."
335
* - GnuTLS manual
336
*/
236
337
gnutls_global_set_log_level(11);
237
338
gnutls_global_set_log_function(debuggnutls);
238
339
}
239
340
240
241
/* openpgp credentials */
242
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
243
!= GNUTLS_E_SUCCESS) {
244
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", /* Spurious
345
warning */
346
safer_gnutls_strerror(ret));
347
gnutls_global_deinit ();
245
348
return -1;
246
349
}
247
350
248
351
if(debug){
249
fprintf(stderr, "Attempting to use openpgp certificate %s"
250
" and keyfile %s as gnutls credentials\n", CERTFILE, KEYFILE);
352
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
353
" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,
354
seckeyfilename);
251
355
}
252
356
253
357
ret = gnutls_certificate_set_openpgp_key_file
254
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
255
if (ret != GNUTLS_E_SUCCESS) {
256
fprintf
257
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
258
ret, CERTFILE, KEYFILE);
259
fprintf(stdout, "The Error is: %s\n",
260
safer_gnutls_strerror(ret));
261
return -1;
262
}
263
264
//Gnutls server initialization
265
if ((ret = gnutls_dh_params_init (&es->dh_params))
266
!= GNUTLS_E_SUCCESS) {
267
fprintf (stderr, "Error in dh parameter initialization: %s\n",
268
safer_gnutls_strerror(ret));
269
return -1;
270
}
271
272
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
273
!= GNUTLS_E_SUCCESS) {
274
fprintf (stderr, "Error in prime generation: %s\n",
275
safer_gnutls_strerror(ret));
276
return -1;
277
}
278
279
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
280
281
// Gnutls session creation
282
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
283
!= GNUTLS_E_SUCCESS){
284
fprintf(stderr, "Error in gnutls session initialization: %s\n",
285
safer_gnutls_strerror(ret));
286
}
287
288
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
289
!= GNUTLS_E_SUCCESS) {
290
fprintf(stderr, "Syntax error at: %s\n", err);
291
fprintf(stderr, "Gnutls error: %s\n",
292
safer_gnutls_strerror(ret));
293
return -1;
294
}
295
296
if ((ret = gnutls_credentials_set
297
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
298
!= GNUTLS_E_SUCCESS) {
299
fprintf(stderr, "Error setting a credentials set: %s\n",
300
safer_gnutls_strerror(ret));
301
return -1;
302
}
303
358
(mc->cred, pubkeyfilename, seckeyfilename,
359
GNUTLS_OPENPGP_FMT_BASE64);
360
if (ret != GNUTLS_E_SUCCESS) {
361
fprintf(stderr,
362
"Error[%d] while reading the OpenPGP key pair ('%s',"
363
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
364
fprintf(stdout, "The GnuTLS error is: %s\n",
365
safer_gnutls_strerror(ret));
366
goto globalfail;
367
}
368
369
/* GnuTLS server initialization */
370
ret = gnutls_dh_params_init(&mc->dh_params);
371
if (ret != GNUTLS_E_SUCCESS) {
372
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
373
" %s\n", safer_gnutls_strerror(ret));
374
goto globalfail;
375
}
376
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
377
if (ret != GNUTLS_E_SUCCESS) {
378
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
379
safer_gnutls_strerror(ret));
380
goto globalfail;
381
}
382
383
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
384
385
return 0;
386
387
globalfail:
388
389
gnutls_certificate_free_credentials(mc->cred);
390
gnutls_global_deinit();
391
return -1;
392
393
}
394
395
static int init_gnutls_session(mandos_context *mc,
396
gnutls_session_t *session){
397
int ret;
398
/* GnuTLS session creation */
399
ret = gnutls_init(session, GNUTLS_SERVER);
400
if (ret != GNUTLS_E_SUCCESS){
401
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
402
safer_gnutls_strerror(ret));
403
}
404
405
{
406
const char *err;
407
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
408
if (ret != GNUTLS_E_SUCCESS) {
409
fprintf(stderr, "Syntax error at: %s\n", err);
410
fprintf(stderr, "GnuTLS error: %s\n",
411
safer_gnutls_strerror(ret));
412
gnutls_deinit (*session);
413
return -1;
414
}
415
}
416
417
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
418
mc->cred);
419
if (ret != GNUTLS_E_SUCCESS) {
420
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
421
safer_gnutls_strerror(ret));
422
gnutls_deinit (*session);
423
return -1;
424
}
425
304
426
/* ignore client certificate if any. */
305
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
427
gnutls_certificate_server_set_request (*session,
428
GNUTLS_CERT_IGNORE);
306
429
307
gnutls_dh_set_prime_bits (es->session, DH_BITS);
430
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
308
431
309
432
return 0;
310
433
}
311
434
312
void empty_log(AvahiLogLevel level, const char *txt){}
435
/* Avahi log function callback */
436
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
437
__attribute__((unused)) const char *txt){}
313
438
314
int start_mandos_communcation(char *ip, uint16_t port){
439
/* Called when a Mandos server is found */
440
static int start_mandos_communication(const char *ip, uint16_t port,
441
AvahiIfIndex if_index,
442
mandos_context *mc){
315
443
int ret, tcp_sd;
316
struct sockaddr_in6 to;
317
encrypted_session es;
444
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
318
445
char *buffer = NULL;
319
446
char *decrypted_buffer;
320
447
size_t buffer_length = 0;
321
448
size_t buffer_capacity = 0;
322
449
ssize_t decrypted_buffer_size;
450
size_t written;
323
451
int retval = 0;
324
const char interface[] = "eth0";
325
452
char interface[IF_NAMESIZE];
453
gnutls_session_t session;
454
455
ret = init_gnutls_session (mc, &session);
456
if (ret != 0){
457
return -1;
458
}
459
326
460
if(debug){
327
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
461
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
462
"\n", ip, port);
328
463
}
329
464
330
465
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
334
469
}
335
470
336
471
if(debug){
472
if(if_indextoname((unsigned int)if_index, interface) == NULL){
473
perror("if_indextoname");
474
return -1;
475
}
337
476
fprintf(stderr, "Binding to interface %s\n", interface);
338
477
}
339
340
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, interface, 5);
341
if(tcp_sd < 0) {
342
perror("setsockopt bindtodevice");
343
return -1;
344
}
345
478
346
memset(&to,0,sizeof(to));
347
to.sin6_family = AF_INET6;
348
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
479
memset(&to, 0, sizeof(to));
480
to.in6.sin6_family = AF_INET6;
481
/* It would be nice to have a way to detect if we were passed an
482
IPv4 address here. Now we assume an IPv6 address. */
483
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
349
484
if (ret < 0 ){
350
485
perror("inet_pton");
351
486
return -1;
352
}
487
}
353
488
if(ret == 0){
354
489
fprintf(stderr, "Bad address: %s\n", ip);
355
490
return -1;
356
491
}
357
to.sin6_port = htons(port);
358
to.sin6_scope_id = if_nametoindex(interface);
359
492
to.in6.sin6_port = htons(port); /* Spurious warning */
493
494
to.in6.sin6_scope_id = (uint32_t)if_index;
495
360
496
if(debug){
361
fprintf(stderr, "Connection to: %s\n", ip);
497
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
498
port);
499
char addrstr[INET6_ADDRSTRLEN] = "";
500
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
501
sizeof(addrstr)) == NULL){
502
perror("inet_ntop");
503
} else {
504
if(strcmp(addrstr, ip) != 0){
505
fprintf(stderr, "Canonical address form: %s\n", addrstr);
506
}
507
}
362
508
}
363
509
364
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
510
ret = connect(tcp_sd, &to.in, sizeof(to));
365
511
if (ret < 0){
366
512
perror("connect");
367
513
return -1;
368
514
}
369
370
ret = initgnutls (&es);
371
if (ret != 0){
372
retval = -1;
373
return -1;
374
}
375
376
377
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
378
515
516
const char *out = mandos_protocol_version;
517
written = 0;
518
while (true){
519
size_t out_size = strlen(out);
520
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
521
out_size - written));
522
if (ret == -1){
523
perror("write");
524
retval = -1;
525
goto mandos_end;
526
}
527
written += (size_t)ret;
528
if(written < out_size){
529
continue;
530
} else {
531
if (out == mandos_protocol_version){
532
written = 0;
533
out = "\r\n";
534
} else {
535
break;
536
}
537
}
538
}
539
379
540
if(debug){
380
fprintf(stderr, "Establishing tls session with %s\n", ip);
541
fprintf(stderr, "Establishing TLS session with %s\n", ip);
381
542
}
543
544
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
382
545
383
384
ret = gnutls_handshake (es.session);
546
do{
547
ret = gnutls_handshake (session);
548
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
385
549
386
550
if (ret != GNUTLS_E_SUCCESS){
387
fprintf(stderr, "\n*** Handshake failed ***\n");
388
gnutls_perror (ret);
551
if(debug){
552
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
553
gnutls_perror (ret);
554
}
389
555
retval = -1;
390
goto exit;
556
goto mandos_end;
391
557
}
392
393
//Retrieve gpg packet that contains the wanted password
394
558
559
/* Read OpenPGP packet that contains the wanted password */
560
395
561
if(debug){
396
fprintf(stderr, "Retrieving pgp encrypted password from %s\n", ip);
562
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
563
ip);
397
564
}
398
565
399
566
while(true){
400
if (buffer_length + BUFFER_SIZE > buffer_capacity){
401
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
402
if (buffer == NULL){
403
perror("realloc");
404
goto exit;
405
}
406
buffer_capacity += BUFFER_SIZE;
567
buffer_capacity = adjustbuffer(&buffer, buffer_length,
568
buffer_capacity);
569
if (buffer_capacity == 0){
570
perror("adjustbuffer");
571
retval = -1;
572
goto mandos_end;
407
573
}
408
574
409
ret = gnutls_record_recv
410
(es.session, buffer+buffer_length, BUFFER_SIZE);
575
ret = gnutls_record_recv(session, buffer+buffer_length,
576
BUFFER_SIZE);
411
577
if (ret == 0){
412
578
break;
413
579
}
417
583
case GNUTLS_E_AGAIN:
418
584
break;
419
585
case GNUTLS_E_REHANDSHAKE:
420
ret = gnutls_handshake (es.session);
586
do{
587
ret = gnutls_handshake (session);
588
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
421
589
if (ret < 0){
422
fprintf(stderr, "\n*** Handshake failed ***\n");
590
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
423
591
gnutls_perror (ret);
424
592
retval = -1;
425
goto exit;
593
goto mandos_end;
426
594
}
427
595
break;
428
596
default:
429
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
597
fprintf(stderr, "Unknown error while reading data from"
598
" encrypted session with Mandos server\n");
430
599
retval = -1;
431
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
432
goto exit;
600
gnutls_bye (session, GNUTLS_SHUT_RDWR);
601
goto mandos_end;
433
602
}
434
603
} else {
435
buffer_length += ret;
604
buffer_length += (size_t) ret;
436
605
}
437
606
}
438
607
608
if(debug){
609
fprintf(stderr, "Closing TLS session\n");
610
}
611
612
gnutls_bye (session, GNUTLS_SHUT_RDWR);
613
439
614
if (buffer_length > 0){
440
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) >= 0){
441
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
615
decrypted_buffer_size = pgp_packet_decrypt(buffer,
616
buffer_length,
617
&decrypted_buffer,
618
keydir);
619
if (decrypted_buffer_size >= 0){
620
written = 0;
621
while(written < (size_t) decrypted_buffer_size){
622
ret = (int)fwrite (decrypted_buffer + written, 1,
623
(size_t)decrypted_buffer_size - written,
624
stdout);
625
if(ret == 0 and ferror(stdout)){
626
if(debug){
627
fprintf(stderr, "Error writing encrypted data: %s\n",
628
strerror(errno));
629
}
630
retval = -1;
631
break;
632
}
633
written += (size_t)ret;
634
}
442
635
free(decrypted_buffer);
443
636
} else {
444
637
retval = -1;
445
638
}
446
639
}
447
448
//shutdown procedure
449
450
if(debug){
451
fprintf(stderr, "Closing tls session\n");
452
}
453
640
641
/* Shutdown procedure */
642
643
mandos_end:
454
644
free(buffer);
455
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
456
exit:
457
645
close(tcp_sd);
458
gnutls_deinit (es.session);
459
gnutls_certificate_free_credentials (es.cred);
460
gnutls_global_deinit ();
646
gnutls_deinit (session);
461
647
return retval;
462
648
}
463
649
464
static AvahiSimplePoll *simple_poll = NULL;
465
static AvahiServer *server = NULL;
466
467
static void resolve_callback(
468
AvahiSServiceResolver *r,
469
AVAHI_GCC_UNUSED AvahiIfIndex interface,
470
AVAHI_GCC_UNUSED AvahiProtocol protocol,
471
AvahiResolverEvent event,
472
const char *name,
473
const char *type,
474
const char *domain,
475
const char *host_name,
476
const AvahiAddress *address,
477
uint16_t port,
478
AvahiStringList *txt,
479
AvahiLookupResultFlags flags,
480
AVAHI_GCC_UNUSED void* userdata) {
481
482
assert(r);
483
484
/* Called whenever a service has been resolved successfully or timed out */
485
486
switch (event) {
487
case AVAHI_RESOLVER_FAILURE:
488
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)));
489
break;
490
491
case AVAHI_RESOLVER_FOUND: {
492
char ip[AVAHI_ADDRESS_STR_MAX];
493
avahi_address_snprint(ip, sizeof(ip), address);
494
if(debug){
495
fprintf(stderr, "Mandos server found at %s on port %d\n", ip, port);
496
}
497
int ret = start_mandos_communcation(ip, port);
498
if (ret == 0){
499
exit(EXIT_SUCCESS);
500
} else {
501
exit(EXIT_FAILURE);
502
}
503
}
504
}
505
avahi_s_service_resolver_free(r);
506
}
507
508
static void browse_callback(
509
AvahiSServiceBrowser *b,
510
AvahiIfIndex interface,
511
AvahiProtocol protocol,
512
AvahiBrowserEvent event,
513
const char *name,
514
const char *type,
515
const char *domain,
516
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
517
void* userdata) {
518
519
AvahiServer *s = userdata;
520
assert(b);
521
522
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
523
524
switch (event) {
525
526
case AVAHI_BROWSER_FAILURE:
527
528
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
529
avahi_simple_poll_quit(simple_poll);
530
return;
531
532
case AVAHI_BROWSER_NEW:
533
/* We ignore the returned resolver object. In the callback
534
function we free it. If the server is terminated before
535
the callback function is called the server will free
536
the resolver for us. */
537
538
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
539
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
540
541
break;
542
543
case AVAHI_BROWSER_REMOVE:
544
break;
545
546
case AVAHI_BROWSER_ALL_FOR_NOW:
547
case AVAHI_BROWSER_CACHE_EXHAUSTED:
548
break;
549
}
550
}
551
552
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
553
AvahiServerConfig config;
650
static void resolve_callback(AvahiSServiceResolver *r,
651
AvahiIfIndex interface,
652
AVAHI_GCC_UNUSED AvahiProtocol protocol,
653
AvahiResolverEvent event,
654
const char *name,
655
const char *type,
656
const char *domain,
657
const char *host_name,
658
const AvahiAddress *address,
659
uint16_t port,
660
AVAHI_GCC_UNUSED AvahiStringList *txt,
661
AVAHI_GCC_UNUSED AvahiLookupResultFlags
662
flags,
663
void* userdata) {
664
mandos_context *mc = userdata;
665
assert(r);
666
667
/* Called whenever a service has been resolved successfully or
668
timed out */
669
670
switch (event) {
671
default:
672
case AVAHI_RESOLVER_FAILURE:
673
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
674
" of type '%s' in domain '%s': %s\n", name, type, domain,
675
avahi_strerror(avahi_server_errno(mc->server)));
676
break;
677
678
case AVAHI_RESOLVER_FOUND:
679
{
680
char ip[AVAHI_ADDRESS_STR_MAX];
681
avahi_address_snprint(ip, sizeof(ip), address);
682
if(debug){
683
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
684
PRIu16 ") on port %d\n", name, host_name, ip,
685
interface, port);
686
}
687
int ret = start_mandos_communication(ip, port, interface, mc);
688
if (ret == 0){
689
avahi_simple_poll_quit(mc->simple_poll);
690
}
691
}
692
}
693
avahi_s_service_resolver_free(r);
694
}
695
696
static void browse_callback( AvahiSServiceBrowser *b,
697
AvahiIfIndex interface,
698
AvahiProtocol protocol,
699
AvahiBrowserEvent event,
700
const char *name,
701
const char *type,
702
const char *domain,
703
AVAHI_GCC_UNUSED AvahiLookupResultFlags
704
flags,
705
void* userdata) {
706
mandos_context *mc = userdata;
707
assert(b);
708
709
/* Called whenever a new services becomes available on the LAN or
710
is removed from the LAN */
711
712
switch (event) {
713
default:
714
case AVAHI_BROWSER_FAILURE:
715
716
fprintf(stderr, "(Avahi browser) %s\n",
717
avahi_strerror(avahi_server_errno(mc->server)));
718
avahi_simple_poll_quit(mc->simple_poll);
719
return;
720
721
case AVAHI_BROWSER_NEW:
722
/* We ignore the returned Avahi resolver object. In the callback
723
function we free it. If the Avahi server is terminated before
724
the callback function is called the Avahi server will free the
725
resolver for us. */
726
727
if (!(avahi_s_service_resolver_new(mc->server, interface,
728
protocol, name, type, domain,
729
AVAHI_PROTO_INET6, 0,
730
resolve_callback, mc)))
731
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
732
name, avahi_strerror(avahi_server_errno(mc->server)));
733
break;
734
735
case AVAHI_BROWSER_REMOVE:
736
break;
737
738
case AVAHI_BROWSER_ALL_FOR_NOW:
739
case AVAHI_BROWSER_CACHE_EXHAUSTED:
740
if(debug){
741
fprintf(stderr, "No Mandos server found, still searching...\n");
742
}
743
break;
744
}
745
}
746
747
/* Combines file name and path and returns the malloced new
748
string. some sane checks could/should be added */
749
static char *combinepath(const char *first, const char *second){
750
char *tmp;
751
int ret = asprintf(&tmp, "%s/%s", first, second);
752
if(ret < 0){
753
return NULL;
754
}
755
return tmp;
756
}
757
758
759
int main(int argc, char *argv[]){
554
760
AvahiSServiceBrowser *sb = NULL;
555
const char db[] = "--debug";
556
761
int error;
557
int ret = 1;
558
int returncode = EXIT_SUCCESS;
559
char *basename = rindex(argv[0], '/');
560
if(basename == NULL){
561
basename = argv[0];
762
int ret;
763
int exitcode = EXIT_SUCCESS;
764
const char *interface = "eth0";
765
struct ifreq network;
766
int sd;
767
uid_t uid;
768
gid_t gid;
769
char *connect_to = NULL;
770
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
771
char *pubkeyfilename = NULL;
772
char *seckeyfilename = NULL;
773
const char *pubkeyname = "pubkey.txt";
774
const char *seckeyname = "seckey.txt";
775
mandos_context mc = { .simple_poll = NULL, .server = NULL,
776
.dh_bits = 1024, .priority = "SECURE256"};
777
bool gnutls_initalized = false;
778
779
{
780
struct argp_option options[] = {
781
{ .name = "debug", .key = 128,
782
.doc = "Debug mode", .group = 3 },
783
{ .name = "connect", .key = 'c',
784
.arg = "IP",
785
.doc = "Connect directly to a sepcified mandos server",
786
.group = 1 },
787
{ .name = "interface", .key = 'i',
788
.arg = "INTERFACE",
789
.doc = "Interface that Avahi will conntect through",
790
.group = 1 },
791
{ .name = "keydir", .key = 'd',
792
.arg = "KEYDIR",
793
.doc = "Directory where the openpgp keyring is",
794
.group = 1 },
795
{ .name = "seckey", .key = 's',
796
.arg = "SECKEY",
797
.doc = "Secret openpgp key for gnutls authentication",
798
.group = 1 },
799
{ .name = "pubkey", .key = 'p',
800
.arg = "PUBKEY",
801
.doc = "Public openpgp key for gnutls authentication",
802
.group = 2 },
803
{ .name = "dh-bits", .key = 129,
804
.arg = "BITS",
805
.doc = "dh-bits to use in gnutls communication",
806
.group = 2 },
807
{ .name = "priority", .key = 130,
808
.arg = "PRIORITY",
809
.doc = "GNUTLS priority", .group = 1 },
810
{ .name = NULL }
811
};
812
813
814
error_t parse_opt (int key, char *arg,
815
struct argp_state *state) {
816
/* Get the INPUT argument from `argp_parse', which we know is
817
a pointer to our plugin list pointer. */
818
switch (key) {
819
case 128:
820
debug = true;
821
break;
822
case 'c':
823
connect_to = arg;
824
break;
825
case 'i':
826
interface = arg;
827
break;
828
case 'd':
829
keydir = arg;
830
break;
831
case 's':
832
seckeyname = arg;
833
break;
834
case 'p':
835
pubkeyname = arg;
836
break;
837
case 129:
838
errno = 0;
839
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
840
if (errno){
841
perror("strtol");
842
exit(EXIT_FAILURE);
843
}
844
break;
845
case 130:
846
mc.priority = arg;
847
break;
848
case ARGP_KEY_ARG:
849
argp_usage (state);
850
case ARGP_KEY_END:
851
break;
852
default:
853
return ARGP_ERR_UNKNOWN;
854
}
855
return 0;
856
}
857
858
struct argp argp = { .options = options, .parser = parse_opt,
859
.args_doc = "",
860
.doc = "Mandos client -- Get and decrypt"
861
" passwords from mandos server" };
862
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
863
if (ret == ARGP_ERR_UNKNOWN){
864
fprintf(stderr, "Unknown error while parsing arguments\n");
865
exitcode = EXIT_FAILURE;
866
goto end;
867
}
868
}
869
870
pubkeyfilename = combinepath(keydir, pubkeyname);
871
if (pubkeyfilename == NULL){
872
perror("combinepath");
873
exitcode = EXIT_FAILURE;
874
goto end;
875
}
876
877
seckeyfilename = combinepath(keydir, seckeyname);
878
if (seckeyfilename == NULL){
879
perror("combinepath");
880
exitcode = EXIT_FAILURE;
881
goto end;
882
}
883
884
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
885
if (ret == -1){
886
fprintf(stderr, "init_gnutls_global failed\n");
887
exitcode = EXIT_FAILURE;
888
goto end;
562
889
} else {
563
basename++;
564
}
565
566
char *program_name = malloc(strlen(basename) + sizeof(db));
567
568
if (program_name == NULL){
569
perror("argv[0]");
570
return EXIT_FAILURE;
571
}
572
573
program_name[0] = '\0';
574
575
for (int i = 1; i < argc; i++){
576
if (not strncmp(argv[i], db, 5)){
577
strcat(strcat(strcat(program_name, db ), "="), basename);
578
if(not strcmp(argv[i], db) or not strcmp(argv[i], program_name)){
579
debug = true;
580
}
890
gnutls_initalized = true;
891
}
892
893
/* If the interface is down, bring it up */
894
{
895
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
896
if(sd < 0) {
897
perror("socket");
898
exitcode = EXIT_FAILURE;
899
goto end;
900
}
901
strcpy(network.ifr_name, interface);
902
ret = ioctl(sd, SIOCGIFFLAGS, &network);
903
if(ret == -1){
904
perror("ioctl SIOCGIFFLAGS");
905
exitcode = EXIT_FAILURE;
906
goto end;
907
}
908
if((network.ifr_flags & IFF_UP) == 0){
909
network.ifr_flags |= IFF_UP;
910
ret = ioctl(sd, SIOCSIFFLAGS, &network);
911
if(ret == -1){
912
perror("ioctl SIOCSIFFLAGS");
913
exitcode = EXIT_FAILURE;
914
goto end;
581
915
}
582
}
583
free(program_name);
584
916
}
917
close(sd);
918
}
919
920
uid = getuid();
921
gid = getgid();
922
923
ret = setuid(uid);
924
if (ret == -1){
925
perror("setuid");
926
}
927
928
setgid(gid);
929
if (ret == -1){
930
perror("setgid");
931
}
932
933
if_index = (AvahiIfIndex) if_nametoindex(interface);
934
if(if_index == 0){
935
fprintf(stderr, "No such interface: \"%s\"\n", interface);
936
exit(EXIT_FAILURE);
937
}
938
939
if(connect_to != NULL){
940
/* Connect directly, do not use Zeroconf */
941
/* (Mainly meant for debugging) */
942
char *address = strrchr(connect_to, ':');
943
if(address == NULL){
944
fprintf(stderr, "No colon in address\n");
945
exitcode = EXIT_FAILURE;
946
goto end;
947
}
948
errno = 0;
949
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
950
if(errno){
951
perror("Bad port number");
952
exitcode = EXIT_FAILURE;
953
goto end;
954
}
955
*address = '\0';
956
address = connect_to;
957
ret = start_mandos_communication(address, port, if_index, &mc);
958
if(ret < 0){
959
exitcode = EXIT_FAILURE;
960
} else {
961
exitcode = EXIT_SUCCESS;
962
}
963
goto end;
964
}
965
585
966
if (not debug){
586
967
avahi_set_log_function(empty_log);
587
968
}
588
969
589
/* Initialize the psuedo-RNG */
590
srand(time(NULL));
591
592
/* Allocate main loop object */
593
if (!(simple_poll = avahi_simple_poll_new())) {
594
fprintf(stderr, "Failed to create simple poll object.\n");
595
596
goto exit;
597
}
598
599
/* Do not publish any local records */
600
avahi_server_config_init(&config);
601
config.publish_hinfo = 0;
602
config.publish_addresses = 0;
603
config.publish_workstation = 0;
604
config.publish_domain = 0;
605
606
/* Allocate a new server */
607
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
608
609
/* Free the configuration data */
610
avahi_server_config_free(&config);
611
612
/* Check if creating the server object succeeded */
613
if (!server) {
614
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
615
returncode = EXIT_FAILURE;
616
goto exit;
617
}
618
619
/* Create the service browser */
620
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
621
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
622
returncode = EXIT_FAILURE;
623
goto exit;
970
/* Initialize the pseudo-RNG for Avahi */
971
srand((unsigned int) time(NULL));
972
973
/* Allocate main Avahi loop object */
974
mc.simple_poll = avahi_simple_poll_new();
975
if (mc.simple_poll == NULL) {
976
fprintf(stderr, "Avahi: Failed to create simple poll"
977
" object.\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
}
981
982
{
983
AvahiServerConfig config;
984
/* Do not publish any local Zeroconf records */
985
avahi_server_config_init(&config);
986
config.publish_hinfo = 0;
987
config.publish_addresses = 0;
988
config.publish_workstation = 0;
989
config.publish_domain = 0;
990
991
/* Allocate a new server */
992
mc.server = avahi_server_new(avahi_simple_poll_get
993
(mc.simple_poll), &config, NULL,
994
NULL, &error);
995
996
/* Free the Avahi configuration data */
997
avahi_server_config_free(&config);
998
}
999
1000
/* Check if creating the Avahi server object succeeded */
1001
if (mc.server == NULL) {
1002
fprintf(stderr, "Failed to create Avahi server: %s\n",
1003
avahi_strerror(error));
1004
exitcode = EXIT_FAILURE;
1005
goto end;
1006
}
1007
1008
/* Create the Avahi service browser */
1009
sb = avahi_s_service_browser_new(mc.server, if_index,
1010
AVAHI_PROTO_INET6,
1011
"_mandos._tcp", NULL, 0,
1012
browse_callback, &mc);
1013
if (sb == NULL) {
1014
fprintf(stderr, "Failed to create service browser: %s\n",
1015
avahi_strerror(avahi_server_errno(mc.server)));
1016
exitcode = EXIT_FAILURE;
1017
goto end;
624
1018
}
625
1019
626
1020
/* Run the main loop */
627
1021
628
1022
if (debug){
629
fprintf(stderr, "Starting avahi loop search\n");
1023
fprintf(stderr, "Starting Avahi loop search\n");
630
1024
}
631
1025
632
avahi_simple_poll_loop(simple_poll);
1026
avahi_simple_poll_loop(mc.simple_poll);
633
1027
634
exit:
1028
end:
635
1029
636
1030
if (debug){
637
1031
fprintf(stderr, "%s exiting\n", argv[0]);
638
1032
}
639
1033
640
1034
/* Cleanup things */
641
if (sb)
1035
if (sb != NULL)
642
1036
avahi_s_service_browser_free(sb);
643
1037
644
if (server)
645
avahi_server_free(server);
646
647
if (simple_poll)
648
avahi_simple_poll_free(simple_poll);
649
650
return ret;
1038
if (mc.server != NULL)
1039
avahi_server_free(mc.server);
1040
1041
if (mc.simple_poll != NULL)
1042
avahi_simple_poll_free(mc.simple_poll);
1043
free(pubkeyfilename);
1044
free(seckeyfilename);
1045
1046
if (gnutls_initalized){
1047
gnutls_certificate_free_credentials(mc.cred);
1048
gnutls_global_deinit ();
1049
}
1050
1051
return exitcode;
651
1052
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0