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- Committer: Björn Påhlsson
- Date: 2009-01-05 22:29:12 UTC
- mfrom: (248 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@braxen-20090105222912-chcppk4uaxyfbr12
merge
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
8
8
* includes the following functions: "resolve_callback",
9
9
* "browse_callback", and parts of "main".
10
10
*
11
* Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
12
* Påhlsson.
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
13
14
*
14
15
* This program is free software: you can redistribute it and/or
15
16
* modify it under the terms of the GNU General Public License as
25
26
* along with this program. If not, see
26
27
* <http://www.gnu.org/licenses/>.
27
28
*
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
#define _FORTIFY_SOURCE 2
33
32
/* Needed by GPGME, specifically gpgme_data_seek() */
34
33
#define _LARGEFILE_SOURCE
35
34
#define _FILE_OFFSET_BITS 64
36
35
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror() */
40
#include <stdint.h> /* uint16_t, uint32_t */
41
#include <stddef.h> /* NULL, size_t, ssize_t */
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
43
srand() */
44
#include <stdbool.h> /* bool, true */
45
#include <string.h> /* memset(), strcmp(), strlen(),
46
strerror(), asprintf(), strcpy() */
47
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
49
sockaddr_in6, PF_INET6,
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(), DIR */
52
#include <sys/stat.h> /* open() */
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16 */
59
#include <assert.h> /* assert() */
60
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
SIOCSIFFLAGS, if_indextoname(),
64
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
getuid(), getgid(), setuid(),
68
setgid() */
69
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and */
71
#include <argp.h> /* struct argp_option, error_t, struct
72
argp_state, struct argp,
73
argp_parse(), ARGP_KEY_ARG,
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
75
76
/* Avahi */
77
/* All Avahi types, constants and functions
78
Avahi*, avahi_*,
79
AVAHI_* */
43
80
#include <avahi-core/core.h>
44
81
#include <avahi-core/lookup.h>
45
82
#include <avahi-core/log.h>
47
84
#include <avahi-common/malloc.h>
48
85
#include <avahi-common/error.h>
49
86
50
//mandos client part
51
#include <sys/types.h> /* socket(), inet_pton() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton() */
54
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
55
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
56
57
#include <unistd.h> /* close() */
58
#include <netinet/in.h>
59
#include <stdbool.h> /* true */
60
#include <string.h> /* memset */
61
#include <arpa/inet.h> /* inet_pton() */
62
#include <iso646.h> /* not */
63
64
// gpgme
65
#include <errno.h> /* perror() */
66
#include <gpgme.h>
67
68
// getopt long
69
#include <getopt.h>
87
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
90
gnutls_*
91
init_gnutls_session(),
92
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
94
GNUTLS_OPENPGP_FMT_BASE64 */
95
96
/* GPGME */
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
99
gpgme_*
100
GPGME_PROTOCOL_OpenPGP,
101
GPG_ERR_NO_* */
70
102
71
103
#define BUFFER_SIZE 256
72
#define DH_BITS 1024
73
104
74
const char *certdir = "/conf/conf.d/cryptkeyreq/";
75
const char *certfile = "openpgp-client.txt";
76
const char *certkey = "openpgp-client-key.txt";
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
77
108
78
109
bool debug = false;
110
static const char mandos_protocol_version[] = "1";
111
const char *argp_program_version = "mandos-client " VERSION;
112
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
79
113
114
/* Used for passing in values through the Avahi callback functions */
80
115
typedef struct {
81
gnutls_session_t session;
116
AvahiSimplePoll *simple_poll;
117
AvahiServer *server;
82
118
gnutls_certificate_credentials_t cred;
119
unsigned int dh_bits;
83
120
gnutls_dh_params_t dh_params;
84
} encrypted_session;
85
86
87
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet, const char *homedir){
89
gpgme_data_t dh_crypto, dh_plain;
121
const char *priority;
90
122
gpgme_ctx_t ctx;
123
} mandos_context;
124
125
/*
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
128
* "buffer_length" is how much is already used.
129
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
131
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
133
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
135
return 0;
136
}
137
buffer_capacity += BUFFER_SIZE;
138
}
139
return buffer_capacity;
140
}
141
142
/*
143
* Initialize GPGME.
144
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
int ret;
91
148
gpgme_error_t rc;
92
ssize_t ret;
93
ssize_t new_packet_capacity = 0;
94
ssize_t new_packet_length = 0;
95
149
gpgme_engine_info_t engine_info;
96
150
151
152
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
154
*/
155
bool import_key(const char *filename){
156
int fd;
157
gpgme_data_t pgp_data;
158
159
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
if(fd == -1){
161
perror("open");
162
return false;
163
}
164
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
gpgme_strsource(rc), gpgme_strerror(rc));
169
return false;
170
}
171
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
ret = TEMP_FAILURE_RETRY(close(fd));
180
if(ret == -1){
181
perror("close");
182
}
183
gpgme_data_release(pgp_data);
184
return true;
185
}
186
97
187
if (debug){
98
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
188
fprintf(stderr, "Initialize gpgme\n");
99
189
}
100
190
101
191
/* Init GPGME */
104
194
if (rc != GPG_ERR_NO_ERROR){
105
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
106
196
gpgme_strsource(rc), gpgme_strerror(rc));
107
return -1;
197
return false;
108
198
}
109
199
110
/* Set GPGME home directory */
200
/* Set GPGME home directory for the OpenPGP engine only */
111
201
rc = gpgme_get_engine_info (&engine_info);
112
202
if (rc != GPG_ERR_NO_ERROR){
113
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
114
204
gpgme_strsource(rc), gpgme_strerror(rc));
115
return -1;
205
return false;
116
206
}
117
207
while(engine_info != NULL){
118
208
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
119
209
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
120
engine_info->file_name, homedir);
210
engine_info->file_name, tempdir);
121
211
break;
122
212
}
123
213
engine_info = engine_info->next;
124
214
}
125
215
if(engine_info == NULL){
126
fprintf(stderr, "Could not set home dir to %s\n", homedir);
127
return -1;
128
}
129
130
/* Create new GPGME data buffer from packet buffer */
131
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
216
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
217
return false;
218
}
219
220
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
225
return false;
226
}
227
228
if (not import_key(pubkey) or not import_key(seckey)){
229
return false;
230
}
231
232
return true;
233
}
234
235
/*
236
* Decrypt OpenPGP data.
237
* Returns -1 on error
238
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
243
gpgme_data_t dh_crypto, dh_plain;
244
gpgme_error_t rc;
245
ssize_t ret;
246
size_t plaintext_capacity = 0;
247
ssize_t plaintext_length = 0;
248
249
if (debug){
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
}
252
253
/* Create new GPGME data buffer from memory cryptotext */
254
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
0);
132
256
if (rc != GPG_ERR_NO_ERROR){
133
257
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
134
258
gpgme_strsource(rc), gpgme_strerror(rc));
140
264
if (rc != GPG_ERR_NO_ERROR){
141
265
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
142
266
gpgme_strsource(rc), gpgme_strerror(rc));
143
return -1;
144
}
145
146
/* Create new GPGME "context" */
147
rc = gpgme_new(&ctx);
148
if (rc != GPG_ERR_NO_ERROR){
149
fprintf(stderr, "bad gpgme_new: %s: %s\n",
150
gpgme_strsource(rc), gpgme_strerror(rc));
151
return -1;
152
}
153
154
/* Decrypt data from the FILE pointer to the plaintext data
155
buffer */
156
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
267
gpgme_data_release(dh_crypto);
268
return -1;
269
}
270
271
/* Decrypt data from the cryptotext data buffer to the plaintext
272
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
157
274
if (rc != GPG_ERR_NO_ERROR){
158
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
159
276
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
277
plaintext_length = -1;
278
if (debug){
279
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
} else {
284
fprintf(stderr, "Unsupported algorithm: %s\n",
285
result->unsupported_algorithm);
286
fprintf(stderr, "Wrong key usage: %u\n",
287
result->wrong_key_usage);
288
if(result->file_name != NULL){
289
fprintf(stderr, "File name: %s\n", result->file_name);
290
}
291
gpgme_recipient_t recipient;
292
recipient = result->recipients;
293
if(recipient){
294
while(recipient != NULL){
295
fprintf(stderr, "Public key algorithm: %s\n",
296
gpgme_pubkey_algo_name(recipient->pubkey_algo));
297
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
298
fprintf(stderr, "Secret key available: %s\n",
299
recipient->status == GPG_ERR_NO_SECKEY
300
? "No" : "Yes");
301
recipient = recipient->next;
302
}
303
}
304
}
305
}
306
goto decrypt_end;
161
307
}
162
308
163
309
if(debug){
164
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
165
}
166
167
if (debug){
168
gpgme_decrypt_result_t result;
169
result = gpgme_op_decrypt_result(ctx);
170
if (result == NULL){
171
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
172
} else {
173
fprintf(stderr, "Unsupported algorithm: %s\n",
174
result->unsupported_algorithm);
175
fprintf(stderr, "Wrong key usage: %d\n",
176
result->wrong_key_usage);
177
if(result->file_name != NULL){
178
fprintf(stderr, "File name: %s\n", result->file_name);
179
}
180
gpgme_recipient_t recipient;
181
recipient = result->recipients;
182
if(recipient){
183
while(recipient != NULL){
184
fprintf(stderr, "Public key algorithm: %s\n",
185
gpgme_pubkey_algo_name(recipient->pubkey_algo));
186
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
187
fprintf(stderr, "Secret key available: %s\n",
188
recipient->status == GPG_ERR_NO_SECKEY
189
? "No" : "Yes");
190
recipient = recipient->next;
191
}
192
}
193
}
194
}
195
196
/* Delete the GPGME FILE pointer cryptotext data buffer */
197
gpgme_data_release(dh_crypto);
310
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
311
}
198
312
199
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
200
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
201
perror("pgpme_data_seek");
315
perror("gpgme_data_seek");
316
plaintext_length = -1;
317
goto decrypt_end;
202
318
}
203
319
204
*new_packet = 0;
320
*plaintext = NULL;
205
321
while(true){
206
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
207
*new_packet = realloc(*new_packet,
208
(unsigned int)new_packet_capacity
209
+ BUFFER_SIZE);
210
if (*new_packet == NULL){
211
perror("realloc");
212
return -1;
213
}
214
new_packet_capacity += BUFFER_SIZE;
322
plaintext_capacity = adjustbuffer(plaintext,
323
(size_t)plaintext_length,
324
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
327
plaintext_length = -1;
328
goto decrypt_end;
215
329
}
216
330
217
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
331
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
218
332
BUFFER_SIZE);
219
333
/* Print the data, if any */
220
334
if (ret == 0){
335
/* EOF */
221
336
break;
222
337
}
223
338
if(ret < 0){
224
339
perror("gpgme_data_read");
225
return -1;
226
}
227
new_packet_length += ret;
228
}
229
230
/* FIXME: check characters before printing to screen so to not print
231
terminal control characters */
232
/* if(debug){ */
233
/* fprintf(stderr, "decrypted password is: "); */
234
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
235
/* fprintf(stderr, "\n"); */
236
/* } */
340
plaintext_length = -1;
341
goto decrypt_end;
342
}
343
plaintext_length += ret;
344
}
345
346
if(debug){
347
fprintf(stderr, "Decrypted password is: ");
348
for(ssize_t i = 0; i < plaintext_length; i++){
349
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
350
}
351
fprintf(stderr, "\n");
352
}
353
354
decrypt_end:
355
356
/* Delete the GPGME cryptotext data buffer */
357
gpgme_data_release(dh_crypto);
237
358
238
359
/* Delete the GPGME plaintext data buffer */
239
360
gpgme_data_release(dh_plain);
240
return new_packet_length;
361
return plaintext_length;
241
362
}
242
363
243
364
static const char * safer_gnutls_strerror (int value) {
244
const char *ret = gnutls_strerror (value);
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
245
366
if (ret == NULL)
246
367
ret = "(unknown)";
247
368
return ret;
248
369
}
249
370
250
void debuggnutls(__attribute__((unused)) int level,
251
const char* string){
252
fprintf(stderr, "%s", string);
371
/* GnuTLS log function callback */
372
static void debuggnutls(__attribute__((unused)) int level,
373
const char* string){
374
fprintf(stderr, "GnuTLS: %s", string);
253
375
}
254
376
255
int initgnutls(encrypted_session *es){
256
const char *err;
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
257
380
int ret;
258
381
259
382
if(debug){
260
383
fprintf(stderr, "Initializing GnuTLS\n");
261
384
}
262
263
if ((ret = gnutls_global_init ())
264
!= GNUTLS_E_SUCCESS) {
265
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
385
386
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
266
390
return -1;
267
391
}
268
392
269
393
if (debug){
394
/* "Use a log level over 10 to enable all debugging options."
395
* - GnuTLS manual
396
*/
270
397
gnutls_global_set_log_level(11);
271
398
gnutls_global_set_log_function(debuggnutls);
272
399
}
273
400
274
/* openpgp credentials */
275
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
276
!= GNUTLS_E_SUCCESS) {
277
fprintf (stderr, "memory error: %s\n",
401
/* OpenPGP credentials */
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
278
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
279
408
return -1;
280
409
}
281
410
282
411
if(debug){
283
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
284
" and keyfile %s as GnuTLS credentials\n", certfile,
285
certkey);
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
286
415
}
287
416
288
417
ret = gnutls_certificate_set_openpgp_key_file
289
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
290
420
if (ret != GNUTLS_E_SUCCESS) {
291
fprintf
292
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
293
" '%s')\n",
294
ret, certfile, certkey);
295
fprintf(stdout, "The Error is: %s\n",
421
fprintf(stderr,
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
296
425
safer_gnutls_strerror(ret));
297
return -1;
298
}
299
300
//GnuTLS server initialization
301
if ((ret = gnutls_dh_params_init (&es->dh_params))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "Error in dh parameter initialization: %s\n",
304
safer_gnutls_strerror(ret));
305
return -1;
306
}
307
308
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
309
!= GNUTLS_E_SUCCESS) {
310
fprintf (stderr, "Error in prime generation: %s\n",
311
safer_gnutls_strerror(ret));
312
return -1;
313
}
314
315
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
316
317
// GnuTLS session creation
318
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
319
!= GNUTLS_E_SUCCESS){
426
goto globalfail;
427
}
428
429
/* GnuTLS server initialization */
430
ret = gnutls_dh_params_init(&mc->dh_params);
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
434
goto globalfail;
435
}
436
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
440
goto globalfail;
441
}
442
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
444
445
return 0;
446
447
globalfail:
448
449
gnutls_certificate_free_credentials(mc->cred);
450
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
452
return -1;
453
}
454
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
457
int ret;
458
/* GnuTLS session creation */
459
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
320
461
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
321
462
safer_gnutls_strerror(ret));
322
463
}
323
464
324
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
325
!= GNUTLS_E_SUCCESS) {
326
fprintf(stderr, "Syntax error at: %s\n", err);
327
fprintf(stderr, "GnuTLS error: %s\n",
328
safer_gnutls_strerror(ret));
329
return -1;
465
{
466
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
469
fprintf(stderr, "Syntax error at: %s\n", err);
470
fprintf(stderr, "GnuTLS error: %s\n",
471
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
473
return -1;
474
}
330
475
}
331
476
332
if ((ret = gnutls_credentials_set
333
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
334
!= GNUTLS_E_SUCCESS) {
335
fprintf(stderr, "Error setting a credentials set: %s\n",
477
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
480
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
336
481
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
337
483
return -1;
338
484
}
339
485
340
486
/* ignore client certificate if any. */
341
gnutls_certificate_server_set_request (es->session,
487
gnutls_certificate_server_set_request (*session,
342
488
GNUTLS_CERT_IGNORE);
343
489
344
gnutls_dh_set_prime_bits (es->session, DH_BITS);
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
345
491
346
492
return 0;
347
493
}
348
494
349
void empty_log(__attribute__((unused)) AvahiLogLevel level,
350
__attribute__((unused)) const char *txt){}
495
/* Avahi log function callback */
496
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
497
__attribute__((unused)) const char *txt){}
351
498
352
int start_mandos_communication(const char *ip, uint16_t port,
353
unsigned int if_index){
499
/* Called when a Mandos server is found */
500
static int start_mandos_communication(const char *ip, uint16_t port,
501
AvahiIfIndex if_index,
502
mandos_context *mc){
354
503
int ret, tcp_sd;
355
struct sockaddr_in6 to;
356
encrypted_session es;
504
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
357
505
char *buffer = NULL;
358
506
char *decrypted_buffer;
359
507
size_t buffer_length = 0;
360
508
size_t buffer_capacity = 0;
361
509
ssize_t decrypted_buffer_size;
362
size_t written = 0;
510
size_t written;
363
511
int retval = 0;
364
512
char interface[IF_NAMESIZE];
513
gnutls_session_t session;
514
515
ret = init_gnutls_session (mc, &session);
516
if (ret != 0){
517
return -1;
518
}
365
519
366
520
if(debug){
367
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
521
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
522
"\n", ip, port);
368
523
}
369
524
370
525
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
373
528
return -1;
374
529
}
375
530
376
if(if_indextoname(if_index, interface) == NULL){
377
if(debug){
531
if(debug){
532
if(if_indextoname((unsigned int)if_index, interface) == NULL){
378
533
perror("if_indextoname");
534
return -1;
379
535
}
380
return -1;
381
}
382
383
if(debug){
384
536
fprintf(stderr, "Binding to interface %s\n", interface);
385
537
}
386
538
387
memset(&to,0,sizeof(to)); /* Spurious warning */
388
to.sin6_family = AF_INET6;
389
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
539
memset(&to, 0, sizeof(to));
540
to.in6.sin6_family = AF_INET6;
541
/* It would be nice to have a way to detect if we were passed an
542
IPv4 address here. Now we assume an IPv6 address. */
543
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
390
544
if (ret < 0 ){
391
545
perror("inet_pton");
392
546
return -1;
393
}
547
}
394
548
if(ret == 0){
395
549
fprintf(stderr, "Bad address: %s\n", ip);
396
550
return -1;
397
551
}
398
to.sin6_port = htons(port); /* Spurious warning */
552
to.in6.sin6_port = htons(port); /* Spurious warning */
399
553
400
to.sin6_scope_id = (uint32_t)if_index;
554
to.in6.sin6_scope_id = (uint32_t)if_index;
401
555
402
556
if(debug){
403
fprintf(stderr, "Connection to: %s\n", ip);
557
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
558
port);
559
char addrstr[INET6_ADDRSTRLEN] = "";
560
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
561
sizeof(addrstr)) == NULL){
562
perror("inet_ntop");
563
} else {
564
if(strcmp(addrstr, ip) != 0){
565
fprintf(stderr, "Canonical address form: %s\n", addrstr);
566
}
567
}
404
568
}
405
569
406
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
570
ret = connect(tcp_sd, &to.in, sizeof(to));
407
571
if (ret < 0){
408
572
perror("connect");
409
573
return -1;
410
574
}
411
575
412
ret = initgnutls (&es);
413
if (ret != 0){
414
retval = -1;
415
return -1;
576
const char *out = mandos_protocol_version;
577
written = 0;
578
while (true){
579
size_t out_size = strlen(out);
580
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
581
out_size - written));
582
if (ret == -1){
583
perror("write");
584
retval = -1;
585
goto mandos_end;
586
}
587
written += (size_t)ret;
588
if(written < out_size){
589
continue;
590
} else {
591
if (out == mandos_protocol_version){
592
written = 0;
593
out = "\r\n";
594
} else {
595
break;
596
}
597
}
416
598
}
417
599
418
gnutls_transport_set_ptr (es.session,
419
(gnutls_transport_ptr_t) tcp_sd);
420
421
600
if(debug){
422
601
fprintf(stderr, "Establishing TLS session with %s\n", ip);
423
602
}
424
603
425
ret = gnutls_handshake (es.session);
604
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
605
606
do{
607
ret = gnutls_handshake (session);
608
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
426
609
427
610
if (ret != GNUTLS_E_SUCCESS){
428
611
if(debug){
429
fprintf(stderr, "\n*** Handshake failed ***\n");
612
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
430
613
gnutls_perror (ret);
431
614
}
432
615
retval = -1;
433
goto exit;
616
goto mandos_end;
434
617
}
435
618
436
//Retrieve OpenPGP packet that contains the wanted password
619
/* Read OpenPGP packet that contains the wanted password */
437
620
438
621
if(debug){
439
622
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
440
623
ip);
441
624
}
442
625
443
626
while(true){
444
if (buffer_length + BUFFER_SIZE > buffer_capacity){
445
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
446
if (buffer == NULL){
447
perror("realloc");
448
goto exit;
449
}
450
buffer_capacity += BUFFER_SIZE;
627
buffer_capacity = adjustbuffer(&buffer, buffer_length,
628
buffer_capacity);
629
if (buffer_capacity == 0){
630
perror("adjustbuffer");
631
retval = -1;
632
goto mandos_end;
451
633
}
452
634
453
ret = gnutls_record_recv
454
(es.session, buffer+buffer_length, BUFFER_SIZE);
635
ret = gnutls_record_recv(session, buffer+buffer_length,
636
BUFFER_SIZE);
455
637
if (ret == 0){
456
638
break;
457
639
}
461
643
case GNUTLS_E_AGAIN:
462
644
break;
463
645
case GNUTLS_E_REHANDSHAKE:
464
ret = gnutls_handshake (es.session);
646
do{
647
ret = gnutls_handshake (session);
648
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
465
649
if (ret < 0){
466
fprintf(stderr, "\n*** Handshake failed ***\n");
650
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
467
651
gnutls_perror (ret);
468
652
retval = -1;
469
goto exit;
653
goto mandos_end;
470
654
}
471
655
break;
472
656
default:
473
657
fprintf(stderr, "Unknown error while reading data from"
474
" encrypted session with mandos server\n");
658
" encrypted session with Mandos server\n");
475
659
retval = -1;
476
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
477
goto exit;
660
gnutls_bye (session, GNUTLS_SHUT_RDWR);
661
goto mandos_end;
478
662
}
479
663
} else {
480
664
buffer_length += (size_t) ret;
481
665
}
482
666
}
483
667
668
if(debug){
669
fprintf(stderr, "Closing TLS session\n");
670
}
671
672
gnutls_bye (session, GNUTLS_SHUT_RDWR);
673
484
674
if (buffer_length > 0){
485
decrypted_buffer_size = pgp_packet_decrypt(buffer,
675
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
486
676
buffer_length,
487
&decrypted_buffer,
488
certdir);
677
&decrypted_buffer);
489
678
if (decrypted_buffer_size >= 0){
490
while(written < decrypted_buffer_size){
679
written = 0;
680
while(written < (size_t) decrypted_buffer_size){
491
681
ret = (int)fwrite (decrypted_buffer + written, 1,
492
682
(size_t)decrypted_buffer_size - written,
493
683
stdout);
505
695
} else {
506
696
retval = -1;
507
697
}
508
}
509
510
//shutdown procedure
511
512
if(debug){
513
fprintf(stderr, "Closing TLS session\n");
514
}
515
698
} else {
699
retval = -1;
700
}
701
702
/* Shutdown procedure */
703
704
mandos_end:
516
705
free(buffer);
517
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
518
exit:
519
close(tcp_sd);
520
gnutls_deinit (es.session);
521
gnutls_certificate_free_credentials (es.cred);
522
gnutls_global_deinit ();
706
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
707
if(ret == -1){
708
perror("close");
709
}
710
gnutls_deinit (session);
523
711
return retval;
524
712
}
525
713
526
static AvahiSimplePoll *simple_poll = NULL;
527
static AvahiServer *server = NULL;
528
529
static void resolve_callback(
530
AvahiSServiceResolver *r,
531
AvahiIfIndex interface,
532
AVAHI_GCC_UNUSED AvahiProtocol protocol,
533
AvahiResolverEvent event,
534
const char *name,
535
const char *type,
536
const char *domain,
537
const char *host_name,
538
const AvahiAddress *address,
539
uint16_t port,
540
AVAHI_GCC_UNUSED AvahiStringList *txt,
541
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
542
AVAHI_GCC_UNUSED void* userdata) {
543
544
assert(r); /* Spurious warning */
714
static void resolve_callback(AvahiSServiceResolver *r,
715
AvahiIfIndex interface,
716
AVAHI_GCC_UNUSED AvahiProtocol protocol,
717
AvahiResolverEvent event,
718
const char *name,
719
const char *type,
720
const char *domain,
721
const char *host_name,
722
const AvahiAddress *address,
723
uint16_t port,
724
AVAHI_GCC_UNUSED AvahiStringList *txt,
725
AVAHI_GCC_UNUSED AvahiLookupResultFlags
726
flags,
727
void* userdata) {
728
mandos_context *mc = userdata;
729
assert(r);
545
730
546
731
/* Called whenever a service has been resolved successfully or
547
732
timed out */
549
734
switch (event) {
550
735
default:
551
736
case AVAHI_RESOLVER_FAILURE:
552
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
553
" type '%s' in domain '%s': %s\n", name, type, domain,
554
avahi_strerror(avahi_server_errno(server)));
737
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
738
" of type '%s' in domain '%s': %s\n", name, type, domain,
739
avahi_strerror(avahi_server_errno(mc->server)));
555
740
break;
556
741
557
742
case AVAHI_RESOLVER_FOUND:
559
744
char ip[AVAHI_ADDRESS_STR_MAX];
560
745
avahi_address_snprint(ip, sizeof(ip), address);
561
746
if(debug){
562
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
563
" port %d\n", name, host_name, ip, port);
747
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
748
PRIu16 ") on port %d\n", name, host_name, ip,
749
interface, port);
564
750
}
565
int ret = start_mandos_communication(ip, port,
566
(unsigned int) interface);
751
int ret = start_mandos_communication(ip, port, interface, mc);
567
752
if (ret == 0){
568
exit(EXIT_SUCCESS);
753
avahi_simple_poll_quit(mc->simple_poll);
569
754
}
570
755
}
571
756
}
572
757
avahi_s_service_resolver_free(r);
573
758
}
574
759
575
static void browse_callback(
576
AvahiSServiceBrowser *b,
577
AvahiIfIndex interface,
578
AvahiProtocol protocol,
579
AvahiBrowserEvent event,
580
const char *name,
581
const char *type,
582
const char *domain,
583
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
584
void* userdata) {
585
586
AvahiServer *s = userdata;
587
assert(b); /* Spurious warning */
588
589
/* Called whenever a new services becomes available on the LAN or
590
is removed from the LAN */
591
592
switch (event) {
593
default:
594
case AVAHI_BROWSER_FAILURE:
595
596
fprintf(stderr, "(Browser) %s\n",
597
avahi_strerror(avahi_server_errno(server)));
598
avahi_simple_poll_quit(simple_poll);
599
return;
600
601
case AVAHI_BROWSER_NEW:
602
/* We ignore the returned resolver object. In the callback
603
function we free it. If the server is terminated before
604
the callback function is called the server will free
605
the resolver for us. */
606
607
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
608
type, domain,
609
AVAHI_PROTO_INET6, 0,
610
resolve_callback, s)))
611
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
612
avahi_strerror(avahi_server_errno(s)));
613
break;
614
615
case AVAHI_BROWSER_REMOVE:
616
break;
617
618
case AVAHI_BROWSER_ALL_FOR_NOW:
619
case AVAHI_BROWSER_CACHE_EXHAUSTED:
620
break;
760
static void browse_callback( AvahiSServiceBrowser *b,
761
AvahiIfIndex interface,
762
AvahiProtocol protocol,
763
AvahiBrowserEvent event,
764
const char *name,
765
const char *type,
766
const char *domain,
767
AVAHI_GCC_UNUSED AvahiLookupResultFlags
768
flags,
769
void* userdata) {
770
mandos_context *mc = userdata;
771
assert(b);
772
773
/* Called whenever a new services becomes available on the LAN or
774
is removed from the LAN */
775
776
switch (event) {
777
default:
778
case AVAHI_BROWSER_FAILURE:
779
780
fprintf(stderr, "(Avahi browser) %s\n",
781
avahi_strerror(avahi_server_errno(mc->server)));
782
avahi_simple_poll_quit(mc->simple_poll);
783
return;
784
785
case AVAHI_BROWSER_NEW:
786
/* We ignore the returned Avahi resolver object. In the callback
787
function we free it. If the Avahi server is terminated before
788
the callback function is called the Avahi server will free the
789
resolver for us. */
790
791
if (!(avahi_s_service_resolver_new(mc->server, interface,
792
protocol, name, type, domain,
793
AVAHI_PROTO_INET6, 0,
794
resolve_callback, mc)))
795
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
796
name, avahi_strerror(avahi_server_errno(mc->server)));
797
break;
798
799
case AVAHI_BROWSER_REMOVE:
800
break;
801
802
case AVAHI_BROWSER_ALL_FOR_NOW:
803
case AVAHI_BROWSER_CACHE_EXHAUSTED:
804
if(debug){
805
fprintf(stderr, "No Mandos server found, still searching...\n");
621
806
}
622
}
623
624
/* combinds file name and path and returns the malloced new string. som sane checks could/should be added */
625
const char *combinepath(const char *first, const char *second){
626
char *tmp;
627
tmp = malloc(strlen(first) + strlen(second) + 2);
628
if (tmp == NULL){
629
perror("malloc");
630
return NULL;
631
}
632
strcpy(tmp, first);
633
if (first[0] != '\0' and first[strlen(first) - 1] != '/'){
634
strcat(tmp, "/");
635
}
636
strcat(tmp, second);
637
return tmp;
638
}
639
640
641
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
642
AvahiServerConfig config;
807
break;
808
}
809
}
810
811
int main(int argc, char *argv[]){
643
812
AvahiSServiceBrowser *sb = NULL;
644
813
int error;
645
814
int ret;
646
int returncode = EXIT_SUCCESS;
815
int exitcode = EXIT_SUCCESS;
647
816
const char *interface = "eth0";
648
649
while (true){
650
static struct option long_options[] = {
651
{"debug", no_argument, (int *)&debug, 1},
652
{"interface", required_argument, 0, 'i'},
653
{"certdir", required_argument, 0, 'd'},
654
{"certkey", required_argument, 0, 'c'},
655
{"certfile", required_argument, 0, 'k'},
656
{0, 0, 0, 0} };
657
658
int option_index = 0;
659
ret = getopt_long (argc, argv, "i:", long_options,
660
&option_index);
661
662
if (ret == -1){
663
break;
664
}
665
666
switch(ret){
667
case 0:
668
break;
669
case 'i':
670
interface = optarg;
671
break;
672
case 'd':
673
certdir = optarg;
674
break;
675
case 'c':
676
certfile = optarg;
677
break;
678
case 'k':
679
certkey = optarg;
680
break;
681
default:
682
exit(EXIT_FAILURE);
683
}
684
}
685
686
certfile = combinepath(certdir, certfile);
687
if (certfile == NULL){
688
goto exit;
689
}
690
691
certkey = combinepath(certdir, certkey);
692
if (certkey == NULL){
693
goto exit;
694
}
695
817
struct ifreq network;
818
int sd;
819
uid_t uid;
820
gid_t gid;
821
char *connect_to = NULL;
822
char tempdir[] = "/tmp/mandosXXXXXX";
823
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
824
const char *seckey = PATHDIR "/" SECKEY;
825
const char *pubkey = PATHDIR "/" PUBKEY;
826
827
mandos_context mc = { .simple_poll = NULL, .server = NULL,
828
.dh_bits = 1024, .priority = "SECURE256"
829
":!CTYPE-X.509:+CTYPE-OPENPGP" };
830
bool gnutls_initalized = false;
831
bool gpgme_initalized = false;
832
833
{
834
struct argp_option options[] = {
835
{ .name = "debug", .key = 128,
836
.doc = "Debug mode", .group = 3 },
837
{ .name = "connect", .key = 'c',
838
.arg = "ADDRESS:PORT",
839
.doc = "Connect directly to a specific Mandos server",
840
.group = 1 },
841
{ .name = "interface", .key = 'i',
842
.arg = "NAME",
843
.doc = "Interface that will be used to search for Mandos"
844
" servers",
845
.group = 1 },
846
{ .name = "seckey", .key = 's',
847
.arg = "FILE",
848
.doc = "OpenPGP secret key file base name",
849
.group = 1 },
850
{ .name = "pubkey", .key = 'p',
851
.arg = "FILE",
852
.doc = "OpenPGP public key file base name",
853
.group = 2 },
854
{ .name = "dh-bits", .key = 129,
855
.arg = "BITS",
856
.doc = "Bit length of the prime number used in the"
857
" Diffie-Hellman key exchange",
858
.group = 2 },
859
{ .name = "priority", .key = 130,
860
.arg = "STRING",
861
.doc = "GnuTLS priority string for the TLS handshake",
862
.group = 1 },
863
{ .name = NULL }
864
};
865
866
error_t parse_opt (int key, char *arg,
867
struct argp_state *state) {
868
/* Get the INPUT argument from `argp_parse', which we know is
869
a pointer to our plugin list pointer. */
870
switch (key) {
871
case 128: /* --debug */
872
debug = true;
873
break;
874
case 'c': /* --connect */
875
connect_to = arg;
876
break;
877
case 'i': /* --interface */
878
interface = arg;
879
break;
880
case 's': /* --seckey */
881
seckey = arg;
882
break;
883
case 'p': /* --pubkey */
884
pubkey = arg;
885
break;
886
case 129: /* --dh-bits */
887
errno = 0;
888
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
889
if (errno){
890
perror("strtol");
891
exit(EXIT_FAILURE);
892
}
893
break;
894
case 130: /* --priority */
895
mc.priority = arg;
896
break;
897
case ARGP_KEY_ARG:
898
argp_usage (state);
899
case ARGP_KEY_END:
900
break;
901
default:
902
return ARGP_ERR_UNKNOWN;
903
}
904
return 0;
905
}
906
907
struct argp argp = { .options = options, .parser = parse_opt,
908
.args_doc = "",
909
.doc = "Mandos client -- Get and decrypt"
910
" passwords from a Mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
915
goto end;
916
}
917
}
918
919
/* If the interface is down, bring it up */
920
{
921
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
922
if(sd < 0) {
923
perror("socket");
924
exitcode = EXIT_FAILURE;
925
goto end;
926
}
927
strcpy(network.ifr_name, interface);
928
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
if(ret == -1){
930
perror("ioctl SIOCGIFFLAGS");
931
exitcode = EXIT_FAILURE;
932
goto end;
933
}
934
if((network.ifr_flags & IFF_UP) == 0){
935
network.ifr_flags |= IFF_UP;
936
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
if(ret == -1){
938
perror("ioctl SIOCSIFFLAGS");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
ret = TEMP_FAILURE_RETRY(close(sd));
944
if(ret == -1){
945
perror("close");
946
}
947
}
948
949
uid = getuid();
950
gid = getgid();
951
952
ret = setuid(uid);
953
if (ret == -1){
954
perror("setuid");
955
}
956
957
setgid(gid);
958
if (ret == -1){
959
perror("setgid");
960
}
961
962
ret = init_gnutls_global(&mc, pubkey, seckey);
963
if (ret == -1){
964
fprintf(stderr, "init_gnutls_global failed\n");
965
exitcode = EXIT_FAILURE;
966
goto end;
967
} else {
968
gnutls_initalized = true;
969
}
970
971
if(mkdtemp(tempdir) == NULL){
972
perror("mkdtemp");
973
tempdir[0] = '\0';
974
goto end;
975
}
976
977
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
978
fprintf(stderr, "gpgme_initalized failed\n");
979
exitcode = EXIT_FAILURE;
980
goto end;
981
} else {
982
gpgme_initalized = true;
983
}
984
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
986
if(if_index == 0){
987
fprintf(stderr, "No such interface: \"%s\"\n", interface);
988
exit(EXIT_FAILURE);
989
}
990
991
if(connect_to != NULL){
992
/* Connect directly, do not use Zeroconf */
993
/* (Mainly meant for debugging) */
994
char *address = strrchr(connect_to, ':');
995
if(address == NULL){
996
fprintf(stderr, "No colon in address\n");
997
exitcode = EXIT_FAILURE;
998
goto end;
999
}
1000
errno = 0;
1001
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1002
if(errno){
1003
perror("Bad port number");
1004
exitcode = EXIT_FAILURE;
1005
goto end;
1006
}
1007
*address = '\0';
1008
address = connect_to;
1009
ret = start_mandos_communication(address, port, if_index, &mc);
1010
if(ret < 0){
1011
exitcode = EXIT_FAILURE;
1012
} else {
1013
exitcode = EXIT_SUCCESS;
1014
}
1015
goto end;
1016
}
1017
696
1018
if (not debug){
697
1019
avahi_set_log_function(empty_log);
698
1020
}
699
1021
700
/* Initialize the psuedo-RNG */
1022
/* Initialize the pseudo-RNG for Avahi */
701
1023
srand((unsigned int) time(NULL));
702
703
/* Allocate main loop object */
704
if (!(simple_poll = avahi_simple_poll_new())) {
705
fprintf(stderr, "Failed to create simple poll object.\n");
706
707
goto exit;
708
}
709
710
/* Do not publish any local records */
711
avahi_server_config_init(&config);
712
config.publish_hinfo = 0;
713
config.publish_addresses = 0;
714
config.publish_workstation = 0;
715
config.publish_domain = 0;
716
717
/* Allocate a new server */
718
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
719
&config, NULL, NULL, &error);
720
721
/* Free the configuration data */
722
avahi_server_config_free(&config);
723
724
/* Check if creating the server object succeeded */
725
if (!server) {
726
fprintf(stderr, "Failed to create server: %s\n",
1024
1025
/* Allocate main Avahi loop object */
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if (mc.simple_poll == NULL) {
1028
fprintf(stderr, "Avahi: Failed to create simple poll"
1029
" object.\n");
1030
exitcode = EXIT_FAILURE;
1031
goto end;
1032
}
1033
1034
{
1035
AvahiServerConfig config;
1036
/* Do not publish any local Zeroconf records */
1037
avahi_server_config_init(&config);
1038
config.publish_hinfo = 0;
1039
config.publish_addresses = 0;
1040
config.publish_workstation = 0;
1041
config.publish_domain = 0;
1042
1043
/* Allocate a new server */
1044
mc.server = avahi_server_new(avahi_simple_poll_get
1045
(mc.simple_poll), &config, NULL,
1046
NULL, &error);
1047
1048
/* Free the Avahi configuration data */
1049
avahi_server_config_free(&config);
1050
}
1051
1052
/* Check if creating the Avahi server object succeeded */
1053
if (mc.server == NULL) {
1054
fprintf(stderr, "Failed to create Avahi server: %s\n",
727
1055
avahi_strerror(error));
728
returncode = EXIT_FAILURE;
729
goto exit;
1056
exitcode = EXIT_FAILURE;
1057
goto end;
730
1058
}
731
1059
732
/* Create the service browser */
733
sb = avahi_s_service_browser_new(server,
734
(AvahiIfIndex)
735
if_nametoindex(interface),
1060
/* Create the Avahi service browser */
1061
sb = avahi_s_service_browser_new(mc.server, if_index,
736
1062
AVAHI_PROTO_INET6,
737
1063
"_mandos._tcp", NULL, 0,
738
browse_callback, server);
739
if (!sb) {
1064
browse_callback, &mc);
1065
if (sb == NULL) {
740
1066
fprintf(stderr, "Failed to create service browser: %s\n",
741
avahi_strerror(avahi_server_errno(server)));
742
returncode = EXIT_FAILURE;
743
goto exit;
1067
avahi_strerror(avahi_server_errno(mc.server)));
1068
exitcode = EXIT_FAILURE;
1069
goto end;
744
1070
}
745
1071
746
1072
/* Run the main loop */
747
1073
748
1074
if (debug){
749
fprintf(stderr, "Starting avahi loop search\n");
1075
fprintf(stderr, "Starting Avahi loop search\n");
750
1076
}
751
1077
752
avahi_simple_poll_loop(simple_poll);
753
754
exit:
755
1078
avahi_simple_poll_loop(mc.simple_poll);
1079
1080
end:
1081
756
1082
if (debug){
757
1083
fprintf(stderr, "%s exiting\n", argv[0]);
758
1084
}
759
1085
760
1086
/* Cleanup things */
761
if (sb)
1087
if (sb != NULL)
762
1088
avahi_s_service_browser_free(sb);
763
1089
764
if (server)
765
avahi_server_free(server);
766
767
if (simple_poll)
768
avahi_simple_poll_free(simple_poll);
769
free(certfile);
770
free(certkey);
771
772
return returncode;
1090
if (mc.server != NULL)
1091
avahi_server_free(mc.server);
1092
1093
if (mc.simple_poll != NULL)
1094
avahi_simple_poll_free(mc.simple_poll);
1095
1096
if (gnutls_initalized){
1097
gnutls_certificate_free_credentials(mc.cred);
1098
gnutls_global_deinit ();
1099
gnutls_dh_params_deinit(mc.dh_params);
1100
}
1101
1102
if(gpgme_initalized){
1103
gpgme_release(mc.ctx);
1104
}
1105
1106
/* Removes the temp directory used by GPGME */
1107
if(tempdir[0] != '\0'){
1108
DIR *d;
1109
struct dirent *direntry;
1110
d = opendir(tempdir);
1111
if(d == NULL){
1112
perror("opendir");
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
773
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0