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- Committer: Björn Påhlsson
- Date: 2008-08-09 12:43:14 UTC
- mfrom: (53 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 54.
- Revision ID: belorn@braxen-20080809124314-nsbmgfi715n4pz0a
merge
- files added:
- mandos-client.xml
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => mandos-client.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
/* $Id$ */
2
3
/* PLEASE NOTE *
4
* This file demonstrates how to use Avahi's core API, this is
5
* the embeddable mDNS stack for embedded applications.
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
6
4
*
7
* End user applications should *not* use this API and should use
8
* the D-Bus or C APIs, please see
9
* client-browse-services.c and glib-integration.c
10
*
11
* I repeat, you probably do *not* want to use this example.
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>.
12
29
*/
13
30
14
/***
15
This file is part of avahi.
16
17
avahi is free software; you can redistribute it and/or modify it
18
under the terms of the GNU Lesser General Public License as
19
published by the Free Software Foundation; either version 2.1 of the
20
License, or (at your option) any later version.
21
22
avahi is distributed in the hope that it will be useful, but WITHOUT
23
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
25
Public License for more details.
26
27
You should have received a copy of the GNU Lesser General Public
28
License along with avahi; if not, write to the Free Software
29
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30
USA.
31
***/
32
31
/* Needed by GPGME, specifically gpgme_data_seek() */
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
35
34
36
#include <stdio.h>
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
38
#include <stdint.h> /* uint16_t, uint32_t */
39
#include <stddef.h> /* NULL, size_t, ssize_t */
40
#include <stdlib.h> /* free() */
41
#include <stdbool.h> /* bool, true */
42
#include <string.h> /* memset(), strcmp(), strlen, strerror() */
43
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
44
SIOCSIFFLAGS */
45
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
47
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
48
struct in6_addr, inet_pton(),
49
connect() */
37
50
#include <assert.h>
38
#include <stdlib.h>
51
#include <errno.h> /* perror() */
39
52
#include <time.h>
40
#include <net/if.h> /* if_nametoindex */
53
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
54
SIOCSIFFLAGS, if_indextoname(),
55
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
57
#include <netinet/in.h>
58
#include <arpa/inet.h> /* inet_pton(), htons */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
41
63
42
#include <avahi-core/core.h>
64
/* Avahi */
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
43
67
#include <avahi-core/lookup.h>
44
#include <avahi-core/log.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
45
69
#include <avahi-common/simple-watch.h>
46
70
#include <avahi-common/malloc.h>
47
71
#include <avahi-common/error.h>
48
72
49
//mandos client part
50
#include <sys/types.h> /* socket(), setsockopt(), inet_pton() */
51
#include <sys/socket.h> /* socket(), setsockopt(), struct sockaddr_in6, struct in6_addr, inet_pton() */
52
#include <gnutls/gnutls.h> /* ALL GNUTLS STUFF */
53
#include <gnutls/openpgp.h> /* gnutls with openpgp stuff */
54
55
#include <unistd.h> /* close() */
56
#include <netinet/in.h>
57
#include <stdbool.h> /* true */
58
#include <string.h> /* memset */
59
#include <arpa/inet.h> /* inet_pton() */
60
#include <iso646.h> /* not */
61
62
// gpgme
63
#include <errno.h> /* perror() */
64
#include <gpgme.h>
65
66
67
#ifndef CERT_ROOT
68
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
69
#endif
70
#define CERTFILE CERT_ROOT "openpgp-client.txt"
71
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
73
/* GnuTLS */
74
#include <gnutls/gnutls.h> /* gnutls_certificate_credentials_t,
75
gnutls_dh_params_t,
76
gnutls_strerror(),
77
gnutls_global_init(),
78
gnutls_global_set_log_level(),
79
gnutls_global_set_log_function(),
80
gnutls_certificate_allocate_credentials(),
81
gnutls_global_deinit(),
82
gnutls_dh_params_init(),
83
gnutls_dh_params_generate(),
84
gnutls_certificate_set_dh_params(),
85
gnutls_certificate_free_credentials(),
86
gnutls_session_t, gnutls_init(),
87
gnutls_priority_set_direct(),
88
gnutls_deinit(),
89
gnutls_credentials_set(),
90
gnutls_certificate_server_set_request(),
91
gnutls_dh_set_prime_bits(),
92
gnutls_transport_set_ptr(),
93
gnutls_transport_ptr_t,
94
gnutls_handshake(),
95
gnutls_record_recv()
96
gnutls_perror(), gnutls_bye(),
97
init_gnutls_session(),
98
GNUTLS_E_SUCCESS,
99
GNUTLS_CRD_CERTIFICATE,
100
GNUTLS_CERT_IGNORE,
101
GNUTLS_E_INTERRUPTED,
102
GNUTLS_E_AGAIN,
103
GNUTLS_E_REHANDSHAKE,
104
GNUTLS_SHUT_RDWR, */
105
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
106
GNUTLS_OPENPGP_FMT_BASE64 */
107
108
/* GPGME */
109
#include <gpgme.h> /* gpgme_data_t, gpgme_ctx_t,
110
gpgme_error_t, gpgme_engine_info_t,
111
gpgme_check_version(),
112
gpgme_engine_check_version(),
113
gpgme_strsource(),
114
gpgme_strerror(),
115
gpgme_get_engine_info(),
116
gpgme_set_engine_info(),
117
gpgme_data_new_from_mem(),
118
gpgme_data_new(), gpgme_new(),
119
gpgme_op_decrypt(),
120
gpgme_decrypt_result_t,
121
gpgme_op_decrypt_result(),
122
gpgme_recipient_t,
123
gpgme_pubkey_algo_name(),
124
gpgme_data_seek(),
125
gpgme_data_read(),
126
gpgme_data_release()
127
GPGME_PROTOCOL_OpenPGP,
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
130
72
131
#define BUFFER_SIZE 256
73
#define DH_BITS 1024
74
132
133
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
135
static const char mandos_protocol_version[] = "1";
136
const char *argp_program_version = "mandosclient 0.9";
137
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
138
139
/* Used for passing in values through the Avahi callback functions */
75
140
typedef struct {
76
gnutls_session_t session;
141
AvahiSimplePoll *simple_poll;
142
AvahiServer *server;
77
143
gnutls_certificate_credentials_t cred;
144
unsigned int dh_bits;
78
145
gnutls_dh_params_t dh_params;
79
} encrypted_session;
80
81
82
ssize_t gpg_packet_decrypt (char *packet, size_t packet_size, char **new_packet, char *homedir){
146
const char *priority;
147
} mandos_context;
148
149
/*
150
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
151
* "buffer_capacity" is how much is currently allocated,
152
* "buffer_length" is how much is already used.
153
*/
154
size_t adjustbuffer(char **buffer, size_t buffer_length,
155
size_t buffer_capacity){
156
if (buffer_length + BUFFER_SIZE > buffer_capacity){
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
158
if (buffer == NULL){
159
return 0;
160
}
161
buffer_capacity += BUFFER_SIZE;
162
}
163
return buffer_capacity;
164
}
165
166
/*
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
169
*/
170
static ssize_t pgp_packet_decrypt (const char *cryptotext,
171
size_t crypto_size,
172
char **plaintext,
173
const char *homedir){
83
174
gpgme_data_t dh_crypto, dh_plain;
84
175
gpgme_ctx_t ctx;
85
176
gpgme_error_t rc;
86
177
ssize_t ret;
87
size_t new_packet_capacity = 0;
88
size_t new_packet_length = 0;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
89
180
gpgme_engine_info_t engine_info;
90
181
182
if (debug){
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
184
}
185
91
186
/* Init GPGME */
92
187
gpgme_check_version(NULL);
93
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
188
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
189
if (rc != GPG_ERR_NO_ERROR){
190
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
191
gpgme_strsource(rc), gpgme_strerror(rc));
192
return -1;
193
}
94
194
95
/* Set GPGME home directory */
195
/* Set GPGME home directory for the OpenPGP engine only */
96
196
rc = gpgme_get_engine_info (&engine_info);
97
197
if (rc != GPG_ERR_NO_ERROR){
98
198
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
108
208
engine_info = engine_info->next;
109
209
}
110
210
if(engine_info == NULL){
111
fprintf(stderr, "Could not set home dir to %s\n", homedir);
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
112
212
return -1;
113
213
}
114
214
115
/* Create new GPGME data buffer from packet buffer */
116
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
215
/* Create new GPGME data buffer from memory cryptotext */
216
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
217
0);
117
218
if (rc != GPG_ERR_NO_ERROR){
118
219
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
119
220
gpgme_strsource(rc), gpgme_strerror(rc));
125
226
if (rc != GPG_ERR_NO_ERROR){
126
227
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
127
228
gpgme_strsource(rc), gpgme_strerror(rc));
229
gpgme_data_release(dh_crypto);
128
230
return -1;
129
231
}
130
232
133
235
if (rc != GPG_ERR_NO_ERROR){
134
236
fprintf(stderr, "bad gpgme_new: %s: %s\n",
135
237
gpgme_strsource(rc), gpgme_strerror(rc));
136
return -1;
238
plaintext_length = -1;
239
goto decrypt_end;
137
240
}
138
241
139
/* Decrypt data from the FILE pointer to the plaintext data buffer */
242
/* Decrypt data from the cryptotext data buffer to the plaintext
243
data buffer */
140
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
141
245
if (rc != GPG_ERR_NO_ERROR){
142
246
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
143
247
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
145
}
146
147
/* gpgme_decrypt_result_t result; */
148
/* result = gpgme_op_decrypt_result(ctx); */
149
/* fprintf(stderr, "Unsupported algorithm: %s\n", result->unsupported_algorithm); */
150
/* fprintf(stderr, "Wrong key usage: %d\n", result->wrong_key_usage); */
151
/* if(result->file_name != NULL){ */
152
/* fprintf(stderr, "File name: %s\n", result->file_name); */
153
/* } */
154
/* gpgme_recipient_t recipient; */
155
/* recipient = result->recipients; */
156
/* if(recipient){ */
157
/* while(recipient != NULL){ */
158
/* fprintf(stderr, "Public key algorithm: %s\n", */
159
/* gpgme_pubkey_algo_name(recipient->pubkey_algo)); */
160
/* fprintf(stderr, "Key ID: %s\n", recipient->keyid); */
161
/* fprintf(stderr, "Secret key available: %s\n", */
162
/* recipient->status == GPG_ERR_NO_SECKEY ? "No" : "Yes"); */
163
/* recipient = recipient->next; */
164
/* } */
165
/* } */
166
167
/* Delete the GPGME FILE pointer cryptotext data buffer */
168
gpgme_data_release(dh_crypto);
248
plaintext_length = -1;
249
goto decrypt_end;
250
}
251
252
if(debug){
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
254
}
255
256
if (debug){
257
gpgme_decrypt_result_t result;
258
result = gpgme_op_decrypt_result(ctx);
259
if (result == NULL){
260
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
261
} else {
262
fprintf(stderr, "Unsupported algorithm: %s\n",
263
result->unsupported_algorithm);
264
fprintf(stderr, "Wrong key usage: %d\n",
265
result->wrong_key_usage);
266
if(result->file_name != NULL){
267
fprintf(stderr, "File name: %s\n", result->file_name);
268
}
269
gpgme_recipient_t recipient;
270
recipient = result->recipients;
271
if(recipient){
272
while(recipient != NULL){
273
fprintf(stderr, "Public key algorithm: %s\n",
274
gpgme_pubkey_algo_name(recipient->pubkey_algo));
275
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
276
fprintf(stderr, "Secret key available: %s\n",
277
recipient->status == GPG_ERR_NO_SECKEY
278
? "No" : "Yes");
279
recipient = recipient->next;
280
}
281
}
282
}
283
}
169
284
170
285
/* Seek back to the beginning of the GPGME plaintext data buffer */
171
gpgme_data_seek(dh_plain, 0, SEEK_SET);
172
173
*new_packet = 0;
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
287
perror("pgpme_data_seek");
288
plaintext_length = -1;
289
goto decrypt_end;
290
}
291
292
*plaintext = NULL;
174
293
while(true){
175
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
176
*new_packet = realloc(*new_packet, new_packet_capacity + BUFFER_SIZE);
177
if (*new_packet == NULL){
178
perror("realloc");
179
return -1;
180
}
181
new_packet_capacity += BUFFER_SIZE;
294
plaintext_capacity = adjustbuffer(plaintext,
295
(size_t)plaintext_length,
296
plaintext_capacity);
297
if (plaintext_capacity == 0){
298
perror("adjustbuffer");
299
plaintext_length = -1;
300
goto decrypt_end;
182
301
}
183
302
184
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length, BUFFER_SIZE);
303
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
304
BUFFER_SIZE);
185
305
/* Print the data, if any */
186
306
if (ret == 0){
187
/* If password is empty, then a incorrect error will be printed */
307
/* EOF */
188
308
break;
189
309
}
190
310
if(ret < 0){
191
311
perror("gpgme_data_read");
192
return -1;
312
plaintext_length = -1;
313
goto decrypt_end;
193
314
}
194
new_packet_length += ret;
315
plaintext_length += ret;
195
316
}
196
317
197
/* Delete the GPGME plaintext data buffer */
318
if(debug){
319
fprintf(stderr, "Decrypted password is: ");
320
for(ssize_t i = 0; i < plaintext_length; i++){
321
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
322
}
323
fprintf(stderr, "\n");
324
}
325
326
decrypt_end:
327
328
/* Delete the GPGME cryptotext data buffer */
329
gpgme_data_release(dh_crypto);
330
331
/* Delete the GPGME plaintext data buffer */
198
332
gpgme_data_release(dh_plain);
199
return new_packet_length;
333
return plaintext_length;
200
334
}
201
335
202
336
static const char * safer_gnutls_strerror (int value) {
206
340
return ret;
207
341
}
208
342
209
void debuggnutls(int level, const char* string){
210
fprintf(stderr, "%s", string);
343
/* GnuTLS log function callback */
344
static void debuggnutls(__attribute__((unused)) int level,
345
const char* string){
346
fprintf(stderr, "GnuTLS: %s", string);
211
347
}
212
348
213
int initgnutls(encrypted_session *es){
214
const char *err;
349
static int init_gnutls_global(mandos_context *mc,
350
const char *pubkeyfile,
351
const char *seckeyfile){
215
352
int ret;
216
353
354
if(debug){
355
fprintf(stderr, "Initializing GnuTLS\n");
356
}
357
217
358
if ((ret = gnutls_global_init ())
218
359
!= GNUTLS_E_SUCCESS) {
219
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
360
fprintf (stderr, "GnuTLS global_init: %s\n",
361
safer_gnutls_strerror(ret));
220
362
return -1;
221
363
}
222
223
/* Uncomment to enable full debuggin on the gnutls library */
224
/* gnutls_global_set_log_level(11); */
225
/* gnutls_global_set_log_function(debuggnutls); */
226
227
228
/* openpgp credentials */
229
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
364
365
if (debug){
366
/* "Use a log level over 10 to enable all debugging options."
367
* - GnuTLS manual
368
*/
369
gnutls_global_set_log_level(11);
370
gnutls_global_set_log_function(debuggnutls);
371
}
372
373
/* OpenPGP credentials */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
230
375
!= GNUTLS_E_SUCCESS) {
231
fprintf (stderr, "memory error: %s\n", safer_gnutls_strerror(ret));
376
fprintf (stderr, "GnuTLS memory error: %s\n",
377
safer_gnutls_strerror(ret));
378
gnutls_global_deinit ();
232
379
return -1;
233
380
}
234
381
382
if(debug){
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
386
}
387
235
388
ret = gnutls_certificate_set_openpgp_key_file
236
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
237
if (ret != GNUTLS_E_SUCCESS) {
238
fprintf
239
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s', '%s')\n",
240
ret, CERTFILE, KEYFILE);
241
fprintf(stdout, "The Error is: %s\n",
242
safer_gnutls_strerror(ret));
243
return -1;
244
}
245
246
//Gnutls server initialization
247
if ((ret = gnutls_dh_params_init (&es->dh_params))
248
!= GNUTLS_E_SUCCESS) {
249
fprintf (stderr, "Error in dh parameter initialization: %s\n",
250
safer_gnutls_strerror(ret));
251
return -1;
252
}
253
254
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
255
!= GNUTLS_E_SUCCESS) {
256
fprintf (stderr, "Error in prime generation: %s\n",
257
safer_gnutls_strerror(ret));
258
return -1;
259
}
260
261
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
262
263
// Gnutls session creation
264
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
265
!= GNUTLS_E_SUCCESS){
266
fprintf(stderr, "Error in gnutls session initialization: %s\n",
267
safer_gnutls_strerror(ret));
268
}
269
270
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
271
!= GNUTLS_E_SUCCESS) {
272
fprintf(stderr, "Syntax error at: %s\n", err);
273
fprintf(stderr, "Gnutls error: %s\n",
274
safer_gnutls_strerror(ret));
275
return -1;
276
}
277
278
if ((ret = gnutls_credentials_set
279
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
280
!= GNUTLS_E_SUCCESS) {
281
fprintf(stderr, "Error setting a credentials set: %s\n",
282
safer_gnutls_strerror(ret));
283
return -1;
284
}
285
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf(stderr,
392
"Error[%d] while reading the OpenPGP key pair ('%s',"
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
395
safer_gnutls_strerror(ret));
396
goto globalfail;
397
}
398
399
/* GnuTLS server initialization */
400
ret = gnutls_dh_params_init(&mc->dh_params);
401
if (ret != GNUTLS_E_SUCCESS) {
402
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
403
" %s\n", safer_gnutls_strerror(ret));
404
goto globalfail;
405
}
406
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
409
safer_gnutls_strerror(ret));
410
goto globalfail;
411
}
412
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
414
415
return 0;
416
417
globalfail:
418
419
gnutls_certificate_free_credentials(mc->cred);
420
gnutls_global_deinit();
421
return -1;
422
423
}
424
425
static int init_gnutls_session(mandos_context *mc,
426
gnutls_session_t *session){
427
int ret;
428
/* GnuTLS session creation */
429
ret = gnutls_init(session, GNUTLS_SERVER);
430
if (ret != GNUTLS_E_SUCCESS){
431
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
432
safer_gnutls_strerror(ret));
433
}
434
435
{
436
const char *err;
437
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
438
if (ret != GNUTLS_E_SUCCESS) {
439
fprintf(stderr, "Syntax error at: %s\n", err);
440
fprintf(stderr, "GnuTLS error: %s\n",
441
safer_gnutls_strerror(ret));
442
gnutls_deinit (*session);
443
return -1;
444
}
445
}
446
447
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
448
mc->cred);
449
if (ret != GNUTLS_E_SUCCESS) {
450
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
451
safer_gnutls_strerror(ret));
452
gnutls_deinit (*session);
453
return -1;
454
}
455
286
456
/* ignore client certificate if any. */
287
gnutls_certificate_server_set_request (es->session, GNUTLS_CERT_IGNORE);
457
gnutls_certificate_server_set_request (*session,
458
GNUTLS_CERT_IGNORE);
288
459
289
gnutls_dh_set_prime_bits (es->session, DH_BITS);
460
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
290
461
291
462
return 0;
292
463
}
293
464
294
void empty_log(AvahiLogLevel level, const char *txt){}
465
/* Avahi log function callback */
466
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
467
__attribute__((unused)) const char *txt){}
295
468
296
int start_mandos_communcation(char *ip, uint16_t port){
469
/* Called when a Mandos server is found */
470
static int start_mandos_communication(const char *ip, uint16_t port,
471
AvahiIfIndex if_index,
472
mandos_context *mc){
297
473
int ret, tcp_sd;
298
struct sockaddr_in6 to;
299
struct in6_addr ip_addr;
300
encrypted_session es;
474
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
301
475
char *buffer = NULL;
302
476
char *decrypted_buffer;
303
477
size_t buffer_length = 0;
304
478
size_t buffer_capacity = 0;
305
479
ssize_t decrypted_buffer_size;
480
size_t written;
306
481
int retval = 0;
307
482
char interface[IF_NAMESIZE];
483
gnutls_session_t session;
484
485
ret = init_gnutls_session (mc, &session);
486
if (ret != 0){
487
return -1;
488
}
489
490
if(debug){
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
493
}
308
494
309
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
310
496
if(tcp_sd < 0) {
311
497
perror("socket");
312
498
return -1;
313
499
}
314
315
ret = setsockopt(tcp_sd, SOL_SOCKET, SO_BINDTODEVICE, "eth0", 5);
316
if(tcp_sd < 0) {
317
perror("setsockopt bindtodevice");
318
return -1;
500
501
if(debug){
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
503
perror("if_indextoname");
504
return -1;
505
}
506
fprintf(stderr, "Binding to interface %s\n", interface);
319
507
}
320
508
321
memset(&to,0,sizeof(to));
322
to.sin6_family = AF_INET6;
323
ret = inet_pton(AF_INET6, ip, &ip_addr);
509
memset(&to,0,sizeof(to)); /* Spurious warning */
510
to.in6.sin6_family = AF_INET6;
511
/* It would be nice to have a way to detect if we were passed an
512
IPv4 address here. Now we assume an IPv6 address. */
513
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
324
514
if (ret < 0 ){
325
515
perror("inet_pton");
326
516
return -1;
327
}
517
}
328
518
if(ret == 0){
329
519
fprintf(stderr, "Bad address: %s\n", ip);
330
520
return -1;
331
521
}
332
to.sin6_port = htons(port);
333
to.sin6_scope_id = if_nametoindex("eth0");
334
335
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
522
to.in6.sin6_port = htons(port); /* Spurious warning */
523
524
to.in6.sin6_scope_id = (uint32_t)if_index;
525
526
if(debug){
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
528
char addrstr[INET6_ADDRSTRLEN] = "";
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
530
sizeof(addrstr)) == NULL){
531
perror("inet_ntop");
532
} else {
533
if(strcmp(addrstr, ip) != 0){
534
fprintf(stderr, "Canonical address form: %s\n", addrstr);
535
}
536
}
537
}
538
539
ret = connect(tcp_sd, &to.in, sizeof(to));
336
540
if (ret < 0){
337
541
perror("connect");
338
542
return -1;
339
543
}
340
341
ret = initgnutls (&es);
342
if (ret != 0){
343
retval = -1;
344
return -1;
345
}
346
347
348
gnutls_transport_set_ptr (es.session, (gnutls_transport_ptr_t) tcp_sd);
349
544
350
ret = gnutls_handshake (es.session);
545
const char *out = mandos_protocol_version;
546
written = 0;
547
while (true){
548
size_t out_size = strlen(out);
549
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
550
out_size - written));
551
if (ret == -1){
552
perror("write");
553
retval = -1;
554
goto mandos_end;
555
}
556
written += (size_t)ret;
557
if(written < out_size){
558
continue;
559
} else {
560
if (out == mandos_protocol_version){
561
written = 0;
562
out = "\r\n";
563
} else {
564
break;
565
}
566
}
567
}
568
569
if(debug){
570
fprintf(stderr, "Establishing TLS session with %s\n", ip);
571
}
572
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
574
575
ret = gnutls_handshake (session);
351
576
352
577
if (ret != GNUTLS_E_SUCCESS){
353
fprintf(stderr, "\n*** Handshake failed ***\n");
354
gnutls_perror (ret);
578
if(debug){
579
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
580
gnutls_perror (ret);
581
}
355
582
retval = -1;
356
goto exit;
583
goto mandos_end;
584
}
585
586
/* Read OpenPGP packet that contains the wanted password */
587
588
if(debug){
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
590
ip);
357
591
}
358
592
359
//retrive password
360
593
while(true){
361
if (buffer_length + BUFFER_SIZE > buffer_capacity){
362
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
363
if (buffer == NULL){
364
perror("realloc");
365
goto exit;
366
}
367
buffer_capacity += BUFFER_SIZE;
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
595
buffer_capacity);
596
if (buffer_capacity == 0){
597
perror("adjustbuffer");
598
retval = -1;
599
goto mandos_end;
368
600
}
369
601
370
ret = gnutls_record_recv
371
(es.session, buffer+buffer_length, BUFFER_SIZE);
602
ret = gnutls_record_recv(session, buffer+buffer_length,
603
BUFFER_SIZE);
372
604
if (ret == 0){
373
605
break;
374
606
}
378
610
case GNUTLS_E_AGAIN:
379
611
break;
380
612
case GNUTLS_E_REHANDSHAKE:
381
ret = gnutls_handshake (es.session);
613
ret = gnutls_handshake (session);
382
614
if (ret < 0){
383
fprintf(stderr, "\n*** Handshake failed ***\n");
615
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
384
616
gnutls_perror (ret);
385
617
retval = -1;
386
goto exit;
618
goto mandos_end;
387
619
}
388
620
break;
389
621
default:
390
fprintf(stderr, "Unknown error while reading data from encrypted session with mandos server\n");
622
fprintf(stderr, "Unknown error while reading data from"
623
" encrypted session with Mandos server\n");
391
624
retval = -1;
392
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
393
goto exit;
625
gnutls_bye (session, GNUTLS_SHUT_RDWR);
626
goto mandos_end;
394
627
}
395
628
} else {
396
buffer_length += ret;
629
buffer_length += (size_t) ret;
397
630
}
398
631
}
399
632
633
if(debug){
634
fprintf(stderr, "Closing TLS session\n");
635
}
636
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
638
400
639
if (buffer_length > 0){
401
if ((decrypted_buffer_size = gpg_packet_decrypt(buffer, buffer_length, &decrypted_buffer, CERT_ROOT)) == 0){
402
retval = -1;
403
} else {
404
fwrite (decrypted_buffer, 1, decrypted_buffer_size, stdout);
640
decrypted_buffer_size = pgp_packet_decrypt(buffer,
641
buffer_length,
642
&decrypted_buffer,
643
keydir);
644
if (decrypted_buffer_size >= 0){
645
written = 0;
646
while(written < (size_t) decrypted_buffer_size){
647
ret = (int)fwrite (decrypted_buffer + written, 1,
648
(size_t)decrypted_buffer_size - written,
649
stdout);
650
if(ret == 0 and ferror(stdout)){
651
if(debug){
652
fprintf(stderr, "Error writing encrypted data: %s\n",
653
strerror(errno));
654
}
655
retval = -1;
656
break;
657
}
658
written += (size_t)ret;
659
}
405
660
free(decrypted_buffer);
661
} else {
662
retval = -1;
406
663
}
407
664
}
408
665
666
/* Shutdown procedure */
667
668
mandos_end:
409
669
free(buffer);
410
411
//shutdown procedure
412
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
413
exit:
414
670
close(tcp_sd);
415
gnutls_deinit (es.session);
416
gnutls_certificate_free_credentials (es.cred);
417
gnutls_global_deinit ();
671
gnutls_deinit (session);
418
672
return retval;
419
673
}
420
674
421
static AvahiSimplePoll *simple_poll = NULL;
422
static AvahiServer *server = NULL;
423
424
static void resolve_callback(
425
AvahiSServiceResolver *r,
426
AVAHI_GCC_UNUSED AvahiIfIndex interface,
427
AVAHI_GCC_UNUSED AvahiProtocol protocol,
428
AvahiResolverEvent event,
429
const char *name,
430
const char *type,
431
const char *domain,
432
const char *host_name,
433
const AvahiAddress *address,
434
uint16_t port,
435
AvahiStringList *txt,
436
AvahiLookupResultFlags flags,
437
AVAHI_GCC_UNUSED void* userdata) {
438
439
assert(r);
440
441
/* Called whenever a service has been resolved successfully or timed out */
442
443
switch (event) {
444
case AVAHI_RESOLVER_FAILURE:
445
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)));
446
break;
447
448
case AVAHI_RESOLVER_FOUND: {
449
char ip[AVAHI_ADDRESS_STR_MAX];
450
avahi_address_snprint(ip, sizeof(ip), address);
451
int ret = start_mandos_communcation(ip, port);
452
if (ret == 0){
453
exit(EXIT_SUCCESS);
454
} else {
455
exit(EXIT_FAILURE);
456
}
457
}
458
}
459
avahi_s_service_resolver_free(r);
460
}
461
462
static void browse_callback(
463
AvahiSServiceBrowser *b,
464
AvahiIfIndex interface,
465
AvahiProtocol protocol,
466
AvahiBrowserEvent event,
467
const char *name,
468
const char *type,
469
const char *domain,
470
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
471
void* userdata) {
472
473
AvahiServer *s = userdata;
474
assert(b);
475
476
/* Called whenever a new services becomes available on the LAN or is removed from the LAN */
477
478
switch (event) {
479
480
case AVAHI_BROWSER_FAILURE:
481
482
fprintf(stderr, "(Browser) %s\n", avahi_strerror(avahi_server_errno(server)));
483
avahi_simple_poll_quit(simple_poll);
484
return;
485
486
case AVAHI_BROWSER_NEW:
487
/* We ignore the returned resolver object. In the callback
488
function we free it. If the server is terminated before
489
the callback function is called the server will free
490
the resolver for us. */
491
492
if (!(avahi_s_service_resolver_new(s, interface, protocol, name, type, domain, AVAHI_PROTO_INET6, 0, resolve_callback, s)))
493
fprintf(stderr, "Failed to resolve service '%s': %s\n", name, avahi_strerror(avahi_server_errno(s)));
494
495
break;
496
497
case AVAHI_BROWSER_REMOVE:
498
break;
499
500
case AVAHI_BROWSER_ALL_FOR_NOW:
501
case AVAHI_BROWSER_CACHE_EXHAUSTED:
502
break;
503
}
504
}
505
506
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
507
AvahiServerConfig config;
675
static void resolve_callback(AvahiSServiceResolver *r,
676
AvahiIfIndex interface,
677
AVAHI_GCC_UNUSED AvahiProtocol protocol,
678
AvahiResolverEvent event,
679
const char *name,
680
const char *type,
681
const char *domain,
682
const char *host_name,
683
const AvahiAddress *address,
684
uint16_t port,
685
AVAHI_GCC_UNUSED AvahiStringList *txt,
686
AVAHI_GCC_UNUSED AvahiLookupResultFlags
687
flags,
688
void* userdata) {
689
mandos_context *mc = userdata;
690
assert(r); /* Spurious warning */
691
692
/* Called whenever a service has been resolved successfully or
693
timed out */
694
695
switch (event) {
696
default:
697
case AVAHI_RESOLVER_FAILURE:
698
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
699
" of type '%s' in domain '%s': %s\n", name, type, domain,
700
avahi_strerror(avahi_server_errno(mc->server)));
701
break;
702
703
case AVAHI_RESOLVER_FOUND:
704
{
705
char ip[AVAHI_ADDRESS_STR_MAX];
706
avahi_address_snprint(ip, sizeof(ip), address);
707
if(debug){
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, port);
710
}
711
int ret = start_mandos_communication(ip, port, interface, mc);
712
if (ret == 0){
713
exit(EXIT_SUCCESS);
714
}
715
}
716
}
717
avahi_s_service_resolver_free(r);
718
}
719
720
static void browse_callback( AvahiSServiceBrowser *b,
721
AvahiIfIndex interface,
722
AvahiProtocol protocol,
723
AvahiBrowserEvent event,
724
const char *name,
725
const char *type,
726
const char *domain,
727
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
flags,
729
void* userdata) {
730
mandos_context *mc = userdata;
731
assert(b); /* Spurious warning */
732
733
/* Called whenever a new services becomes available on the LAN or
734
is removed from the LAN */
735
736
switch (event) {
737
default:
738
case AVAHI_BROWSER_FAILURE:
739
740
fprintf(stderr, "(Avahi browser) %s\n",
741
avahi_strerror(avahi_server_errno(mc->server)));
742
avahi_simple_poll_quit(mc->simple_poll);
743
return;
744
745
case AVAHI_BROWSER_NEW:
746
/* We ignore the returned Avahi resolver object. In the callback
747
function we free it. If the Avahi server is terminated before
748
the callback function is called the Avahi server will free the
749
resolver for us. */
750
751
if (!(avahi_s_service_resolver_new(mc->server, interface,
752
protocol, name, type, domain,
753
AVAHI_PROTO_INET6, 0,
754
resolve_callback, mc)))
755
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
756
name, avahi_strerror(avahi_server_errno(mc->server)));
757
break;
758
759
case AVAHI_BROWSER_REMOVE:
760
break;
761
762
case AVAHI_BROWSER_ALL_FOR_NOW:
763
case AVAHI_BROWSER_CACHE_EXHAUSTED:
764
if(debug){
765
fprintf(stderr, "No Mandos server found, still searching...\n");
766
}
767
break;
768
}
769
}
770
771
/* Combines file name and path and returns the malloced new
772
string. some sane checks could/should be added */
773
static const char *combinepath(const char *first, const char *second){
774
size_t f_len = strlen(first);
775
size_t s_len = strlen(second);
776
char *tmp = malloc(f_len + s_len + 2);
777
if (tmp == NULL){
778
return NULL;
779
}
780
if(f_len > 0){
781
memcpy(tmp, first, f_len); /* Spurious warning */
782
}
783
tmp[f_len] = '/';
784
if(s_len > 0){
785
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
786
}
787
tmp[f_len + 1 + s_len] = '\0';
788
return tmp;
789
}
790
791
792
int main(int argc, char *argv[]){
508
793
AvahiSServiceBrowser *sb = NULL;
509
794
int error;
510
int ret = 1;
511
512
avahi_set_log_function(empty_log);
513
514
/* Initialize the psuedo-RNG */
515
srand(time(NULL));
516
517
/* Allocate main loop object */
518
if (!(simple_poll = avahi_simple_poll_new())) {
519
fprintf(stderr, "Failed to create simple poll object.\n");
520
goto fail;
521
}
522
523
/* Do not publish any local records */
524
avahi_server_config_init(&config);
525
config.publish_hinfo = 0;
526
config.publish_addresses = 0;
527
config.publish_workstation = 0;
528
config.publish_domain = 0;
529
530
/* /\* Set a unicast DNS server for wide area DNS-SD *\/ */
531
/* avahi_address_parse("193.11.177.11", AVAHI_PROTO_UNSPEC, &config.wide_area_servers[0]); */
532
/* config.n_wide_area_servers = 1; */
533
/* config.enable_wide_area = 1; */
534
535
/* Allocate a new server */
536
server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, NULL, NULL, &error);
537
538
/* Free the configuration data */
539
avahi_server_config_free(&config);
540
541
/* Check wether creating the server object succeeded */
542
if (!server) {
543
fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
544
goto fail;
545
}
546
547
/* Create the service browser */
548
if (!(sb = avahi_s_service_browser_new(server, if_nametoindex("eth0"), AVAHI_PROTO_INET6, "_mandos._tcp", NULL, 0, browse_callback, server))) {
549
fprintf(stderr, "Failed to create service browser: %s\n", avahi_strerror(avahi_server_errno(server)));
550
goto fail;
795
int ret;
796
int exitcode = EXIT_SUCCESS;
797
const char *interface = "eth0";
798
struct ifreq network;
799
int sd;
800
uid_t uid;
801
gid_t gid;
802
char *connect_to = NULL;
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
807
.dh_bits = 1024, .priority = "SECURE256"};
808
bool gnutls_initalized = false;
809
810
{
811
struct argp_option options[] = {
812
{ .name = "debug", .key = 128,
813
.doc = "Debug mode", .group = 3 },
814
{ .name = "connect", .key = 'c',
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
817
.group = 1 },
818
{ .name = "interface", .key = 'i',
819
.arg = "INTERFACE",
820
.doc = "Interface that Avahi will conntect through",
821
.group = 1 },
822
{ .name = "keydir", .key = 'd',
823
.arg = "KEYDIR",
824
.doc = "Directory where the openpgp keyring is",
825
.group = 1 },
826
{ .name = "seckey", .key = 's',
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
829
.group = 1 },
830
{ .name = "pubkey", .key = 'p',
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
833
.group = 2 },
834
{ .name = "dh-bits", .key = 129,
835
.arg = "BITS",
836
.doc = "dh-bits to use in gnutls communication",
837
.group = 2 },
838
{ .name = "priority", .key = 130,
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
841
{ .name = NULL }
842
};
843
844
845
error_t parse_opt (int key, char *arg,
846
struct argp_state *state) {
847
/* Get the INPUT argument from `argp_parse', which we know is
848
a pointer to our plugin list pointer. */
849
switch (key) {
850
case 128:
851
debug = true;
852
break;
853
case 'c':
854
connect_to = arg;
855
break;
856
case 'i':
857
interface = arg;
858
break;
859
case 'd':
860
keydir = arg;
861
break;
862
case 's':
863
seckeyfile = arg;
864
break;
865
case 'p':
866
pubkeyfile = arg;
867
break;
868
case 129:
869
errno = 0;
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
871
if (errno){
872
perror("strtol");
873
exit(EXIT_FAILURE);
874
}
875
break;
876
case 130:
877
mc.priority = arg;
878
break;
879
case ARGP_KEY_ARG:
880
argp_usage (state);
881
break;
882
case ARGP_KEY_END:
883
break;
884
default:
885
return ARGP_ERR_UNKNOWN;
886
}
887
return 0;
888
}
889
890
struct argp argp = { .options = options, .parser = parse_opt,
891
.args_doc = "",
892
.doc = "Mandos client -- Get and decrypt"
893
" passwords from mandos server" };
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
895
}
896
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
899
perror("combinepath");
900
exitcode = EXIT_FAILURE;
901
goto end;
902
}
903
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
906
perror("combinepath");
907
goto end;
908
}
909
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
911
if (ret == -1){
912
fprintf(stderr, "init_gnutls_global\n");
913
goto end;
914
} else {
915
gnutls_initalized = true;
916
}
917
918
uid = getuid();
919
gid = getgid();
920
921
ret = setuid(uid);
922
if (ret == -1){
923
perror("setuid");
924
}
925
926
setgid(gid);
927
if (ret == -1){
928
perror("setgid");
929
}
930
931
if_index = (AvahiIfIndex) if_nametoindex(interface);
932
if(if_index == 0){
933
fprintf(stderr, "No such interface: \"%s\"\n", interface);
934
exit(EXIT_FAILURE);
935
}
936
937
if(connect_to != NULL){
938
/* Connect directly, do not use Zeroconf */
939
/* (Mainly meant for debugging) */
940
char *address = strrchr(connect_to, ':');
941
if(address == NULL){
942
fprintf(stderr, "No colon in address\n");
943
exitcode = EXIT_FAILURE;
944
goto end;
945
}
946
errno = 0;
947
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
948
if(errno){
949
perror("Bad port number");
950
exitcode = EXIT_FAILURE;
951
goto end;
952
}
953
*address = '\0';
954
address = connect_to;
955
ret = start_mandos_communication(address, port, if_index, &mc);
956
if(ret < 0){
957
exitcode = EXIT_FAILURE;
958
} else {
959
exitcode = EXIT_SUCCESS;
960
}
961
goto end;
962
}
963
964
/* If the interface is down, bring it up */
965
{
966
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
967
if(sd < 0) {
968
perror("socket");
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
strcpy(network.ifr_name, interface); /* Spurious warning */
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
974
if(ret == -1){
975
perror("ioctl SIOCGIFFLAGS");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
}
979
if((network.ifr_flags & IFF_UP) == 0){
980
network.ifr_flags |= IFF_UP;
981
ret = ioctl(sd, SIOCSIFFLAGS, &network);
982
if(ret == -1){
983
perror("ioctl SIOCSIFFLAGS");
984
exitcode = EXIT_FAILURE;
985
goto end;
986
}
987
}
988
close(sd);
989
}
990
991
if (not debug){
992
avahi_set_log_function(empty_log);
993
}
994
995
/* Initialize the pseudo-RNG for Avahi */
996
srand((unsigned int) time(NULL));
997
998
/* Allocate main Avahi loop object */
999
mc.simple_poll = avahi_simple_poll_new();
1000
if (mc.simple_poll == NULL) {
1001
fprintf(stderr, "Avahi: Failed to create simple poll"
1002
" object.\n");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
1007
{
1008
AvahiServerConfig config;
1009
/* Do not publish any local Zeroconf records */
1010
avahi_server_config_init(&config);
1011
config.publish_hinfo = 0;
1012
config.publish_addresses = 0;
1013
config.publish_workstation = 0;
1014
config.publish_domain = 0;
1015
1016
/* Allocate a new server */
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1018
(mc.simple_poll), &config, NULL,
1019
NULL, &error);
1020
1021
/* Free the Avahi configuration data */
1022
avahi_server_config_free(&config);
1023
}
1024
1025
/* Check if creating the Avahi server object succeeded */
1026
if (mc.server == NULL) {
1027
fprintf(stderr, "Failed to create Avahi server: %s\n",
1028
avahi_strerror(error));
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
/* Create the Avahi service browser */
1034
sb = avahi_s_service_browser_new(mc.server, if_index,
1035
AVAHI_PROTO_INET6,
1036
"_mandos._tcp", NULL, 0,
1037
browse_callback, &mc);
1038
if (sb == NULL) {
1039
fprintf(stderr, "Failed to create service browser: %s\n",
1040
avahi_strerror(avahi_server_errno(mc.server)));
1041
exitcode = EXIT_FAILURE;
1042
goto end;
551
1043
}
552
1044
553
1045
/* Run the main loop */
554
avahi_simple_poll_loop(simple_poll);
555
556
ret = 0;
557
558
fail:
1046
1047
if (debug){
1048
fprintf(stderr, "Starting Avahi loop search\n");
1049
}
1050
1051
avahi_simple_poll_loop(mc.simple_poll);
1052
1053
end:
1054
1055
if (debug){
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1057
}
559
1058
560
1059
/* Cleanup things */
561
if (sb)
1060
if (sb != NULL)
562
1061
avahi_s_service_browser_free(sb);
563
1062
564
if (server)
565
avahi_server_free(server);
566
567
if (simple_poll)
568
avahi_simple_poll_free(simple_poll);
569
570
return ret;
1063
if (mc.server != NULL)
1064
avahi_server_free(mc.server);
1065
1066
if (mc.simple_poll != NULL)
1067
avahi_simple_poll_free(mc.simple_poll);
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1071
if (gnutls_initalized){
1072
gnutls_certificate_free_credentials (mc.cred);
1073
gnutls_global_deinit ();
1074
}
1075
1076
return exitcode;
571
1077
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0