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- Committer: Teddy Hogeborn
- Date: 2008-10-05 17:38:31 UTC
- Revision ID: teddy@fukt.bsnet.se-20081005173831-fysrfayl4yvhlo6x
* INSTALL: Add instructions on how to set the correct network
interface on the cient, and also how to test the server and
verify the password.
* TODO: Clean up old stuff.
* debian/mandos-client.README.Debian: Separate into sections with
headlines. Add instructions on
how to test the server and
verify the password.
* plugin-runner.conf: Add reminder to update initrd image.
interface on the cient, and also how to test the server and
verify the password.
* TODO: Clean up old stuff.
* debian/mandos-client.README.Debian: Separate into sections with
headlines. Add instructions on
how to test the server and
verify the password.
* plugin-runner.conf: Add reminder to update initrd image.
- 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 Teddy Hogeborn & Björn Påhlsson
13
13
*
14
14
* This program is free software: you can redistribute it and/or
15
15
* modify it under the terms of the GNU General Public License as
25
25
* along with this program. If not, see
26
26
* <http://www.gnu.org/licenses/>.
27
27
*
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
28
* Contact the authors at <mandos@fukt.bsnet.se>.
30
29
*/
31
30
32
#define _FORTIFY_SOURCE 2
33
31
/* Needed by GPGME, specifically gpgme_data_seek() */
34
32
#define _LARGEFILE_SOURCE
35
33
#define _FILE_OFFSET_BITS 64
36
34
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
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, open(), opendir(), DIR */
51
#include <sys/stat.h> /* open() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
55
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
58
#include <assert.h> /* assert() */
59
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
SIOCSIFFLAGS, if_indextoname(),
63
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
68
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
70
#include <argp.h> /* struct argp_option, error_t, struct
71
argp_state, struct argp,
72
argp_parse(), ARGP_KEY_ARG,
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
74
75
/* Avahi */
76
/* All Avahi types, constants and functions
77
Avahi*, avahi_*,
78
AVAHI_* */
43
79
#include <avahi-core/core.h>
44
80
#include <avahi-core/lookup.h>
45
81
#include <avahi-core/log.h>
47
83
#include <avahi-common/malloc.h>
48
84
#include <avahi-common/error.h>
49
85
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>
70
71
#ifndef CERT_ROOT
72
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
73
#endif
74
#define CERTFILE CERT_ROOT "openpgp-client.txt"
75
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
86
/* GnuTLS */
87
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
88
functions:
89
gnutls_*
90
init_gnutls_session(),
91
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
93
GNUTLS_OPENPGP_FMT_BASE64 */
94
95
/* GPGME */
96
#include <gpgme.h> /* All GPGME types, constants and
97
functions:
98
gpgme_*
99
GPGME_PROTOCOL_OpenPGP,
100
GPG_ERR_NO_* */
101
76
102
#define BUFFER_SIZE 256
77
#define DH_BITS 1024
103
104
#define PATHDIR "/conf/conf.d/mandos"
105
#define SECKEY "seckey.txt"
106
#define PUBKEY "pubkey.txt"
78
107
79
108
bool debug = false;
109
static const char mandos_protocol_version[] = "1";
110
const char *argp_program_version = "mandos-client " VERSION;
111
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
80
112
113
/* Used for passing in values through the Avahi callback functions */
81
114
typedef struct {
82
gnutls_session_t session;
115
AvahiSimplePoll *simple_poll;
116
AvahiServer *server;
83
117
gnutls_certificate_credentials_t cred;
118
unsigned int dh_bits;
84
119
gnutls_dh_params_t dh_params;
85
} encrypted_session;
86
87
88
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet, const char *homedir){
90
gpgme_data_t dh_crypto, dh_plain;
120
const char *priority;
91
121
gpgme_ctx_t ctx;
122
} mandos_context;
123
124
/*
125
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
126
* "buffer_capacity" is how much is currently allocated,
127
* "buffer_length" is how much is already used.
128
*/
129
size_t adjustbuffer(char **buffer, size_t buffer_length,
130
size_t buffer_capacity){
131
if (buffer_length + BUFFER_SIZE > buffer_capacity){
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
133
if (buffer == NULL){
134
return 0;
135
}
136
buffer_capacity += BUFFER_SIZE;
137
}
138
return buffer_capacity;
139
}
140
141
/*
142
* Initialize GPGME.
143
*/
144
static bool init_gpgme(mandos_context *mc, const char *seckey,
145
const char *pubkey, const char *tempdir){
146
int ret;
92
147
gpgme_error_t rc;
93
ssize_t ret;
94
ssize_t new_packet_capacity = 0;
95
ssize_t new_packet_length = 0;
96
148
gpgme_engine_info_t engine_info;
97
149
150
151
/*
152
* Helper function to insert pub and seckey to the enigne keyring.
153
*/
154
bool import_key(const char *filename){
155
int fd;
156
gpgme_data_t pgp_data;
157
158
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
159
if(fd == -1){
160
perror("open");
161
return false;
162
}
163
164
rc = gpgme_data_new_from_fd(&pgp_data, fd);
165
if (rc != GPG_ERR_NO_ERROR){
166
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
167
gpgme_strsource(rc), gpgme_strerror(rc));
168
return false;
169
}
170
171
rc = gpgme_op_import(mc->ctx, pgp_data);
172
if (rc != GPG_ERR_NO_ERROR){
173
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
174
gpgme_strsource(rc), gpgme_strerror(rc));
175
return false;
176
}
177
178
ret = TEMP_FAILURE_RETRY(close(fd));
179
if(ret == -1){
180
perror("close");
181
}
182
gpgme_data_release(pgp_data);
183
return true;
184
}
185
98
186
if (debug){
99
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
187
fprintf(stderr, "Initialize gpgme\n");
100
188
}
101
189
102
190
/* Init GPGME */
103
191
gpgme_check_version(NULL);
104
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
192
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
193
if (rc != GPG_ERR_NO_ERROR){
194
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
196
return false;
197
}
105
198
106
/* Set GPGME home directory */
199
/* Set GPGME home directory for the OpenPGP engine only */
107
200
rc = gpgme_get_engine_info (&engine_info);
108
201
if (rc != GPG_ERR_NO_ERROR){
109
202
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
110
203
gpgme_strsource(rc), gpgme_strerror(rc));
111
return -1;
204
return false;
112
205
}
113
206
while(engine_info != NULL){
114
207
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
115
208
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
116
engine_info->file_name, homedir);
209
engine_info->file_name, tempdir);
117
210
break;
118
211
}
119
212
engine_info = engine_info->next;
120
213
}
121
214
if(engine_info == NULL){
122
fprintf(stderr, "Could not set home dir to %s\n", homedir);
123
return -1;
124
}
125
126
/* Create new GPGME data buffer from packet buffer */
127
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
215
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
216
return false;
217
}
218
219
/* Create new GPGME "context" */
220
rc = gpgme_new(&(mc->ctx));
221
if (rc != GPG_ERR_NO_ERROR){
222
fprintf(stderr, "bad gpgme_new: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
224
return false;
225
}
226
227
if (not import_key(pubkey) or not import_key(seckey)){
228
return false;
229
}
230
231
return true;
232
}
233
234
/*
235
* Decrypt OpenPGP data.
236
* Returns -1 on error
237
*/
238
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
239
const char *cryptotext,
240
size_t crypto_size,
241
char **plaintext){
242
gpgme_data_t dh_crypto, dh_plain;
243
gpgme_error_t rc;
244
ssize_t ret;
245
size_t plaintext_capacity = 0;
246
ssize_t plaintext_length = 0;
247
248
if (debug){
249
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
250
}
251
252
/* Create new GPGME data buffer from memory cryptotext */
253
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
254
0);
128
255
if (rc != GPG_ERR_NO_ERROR){
129
256
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
130
257
gpgme_strsource(rc), gpgme_strerror(rc));
136
263
if (rc != GPG_ERR_NO_ERROR){
137
264
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
138
265
gpgme_strsource(rc), gpgme_strerror(rc));
139
return -1;
140
}
141
142
/* Create new GPGME "context" */
143
rc = gpgme_new(&ctx);
144
if (rc != GPG_ERR_NO_ERROR){
145
fprintf(stderr, "bad gpgme_new: %s: %s\n",
146
gpgme_strsource(rc), gpgme_strerror(rc));
147
return -1;
148
}
149
150
/* Decrypt data from the FILE pointer to the plaintext data
151
buffer */
152
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
266
gpgme_data_release(dh_crypto);
267
return -1;
268
}
269
270
/* Decrypt data from the cryptotext data buffer to the plaintext
271
data buffer */
272
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
153
273
if (rc != GPG_ERR_NO_ERROR){
154
274
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
155
275
gpgme_strsource(rc), gpgme_strerror(rc));
156
return -1;
276
plaintext_length = -1;
277
if (debug){
278
gpgme_decrypt_result_t result;
279
result = gpgme_op_decrypt_result(mc->ctx);
280
if (result == NULL){
281
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
282
} else {
283
fprintf(stderr, "Unsupported algorithm: %s\n",
284
result->unsupported_algorithm);
285
fprintf(stderr, "Wrong key usage: %u\n",
286
result->wrong_key_usage);
287
if(result->file_name != NULL){
288
fprintf(stderr, "File name: %s\n", result->file_name);
289
}
290
gpgme_recipient_t recipient;
291
recipient = result->recipients;
292
if(recipient){
293
while(recipient != NULL){
294
fprintf(stderr, "Public key algorithm: %s\n",
295
gpgme_pubkey_algo_name(recipient->pubkey_algo));
296
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
297
fprintf(stderr, "Secret key available: %s\n",
298
recipient->status == GPG_ERR_NO_SECKEY
299
? "No" : "Yes");
300
recipient = recipient->next;
301
}
302
}
303
}
304
}
305
goto decrypt_end;
157
306
}
158
307
159
308
if(debug){
160
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
161
}
162
163
if (debug){
164
gpgme_decrypt_result_t result;
165
result = gpgme_op_decrypt_result(ctx);
166
if (result == NULL){
167
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
168
} else {
169
fprintf(stderr, "Unsupported algorithm: %s\n",
170
result->unsupported_algorithm);
171
fprintf(stderr, "Wrong key usage: %d\n",
172
result->wrong_key_usage);
173
if(result->file_name != NULL){
174
fprintf(stderr, "File name: %s\n", result->file_name);
175
}
176
gpgme_recipient_t recipient;
177
recipient = result->recipients;
178
if(recipient){
179
while(recipient != NULL){
180
fprintf(stderr, "Public key algorithm: %s\n",
181
gpgme_pubkey_algo_name(recipient->pubkey_algo));
182
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
183
fprintf(stderr, "Secret key available: %s\n",
184
recipient->status == GPG_ERR_NO_SECKEY
185
? "No" : "Yes");
186
recipient = recipient->next;
187
}
188
}
189
}
190
}
191
192
/* Delete the GPGME FILE pointer cryptotext data buffer */
193
gpgme_data_release(dh_crypto);
309
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
310
}
194
311
195
312
/* Seek back to the beginning of the GPGME plaintext data buffer */
196
gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);
197
198
*new_packet = 0;
313
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
314
perror("gpgme_data_seek");
315
plaintext_length = -1;
316
goto decrypt_end;
317
}
318
319
*plaintext = NULL;
199
320
while(true){
200
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
201
*new_packet = realloc(*new_packet,
202
(unsigned int)new_packet_capacity
203
+ BUFFER_SIZE);
204
if (*new_packet == NULL){
205
perror("realloc");
206
return -1;
207
}
208
new_packet_capacity += BUFFER_SIZE;
321
plaintext_capacity = adjustbuffer(plaintext,
322
(size_t)plaintext_length,
323
plaintext_capacity);
324
if (plaintext_capacity == 0){
325
perror("adjustbuffer");
326
plaintext_length = -1;
327
goto decrypt_end;
209
328
}
210
329
211
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
212
331
BUFFER_SIZE);
213
332
/* Print the data, if any */
214
333
if (ret == 0){
334
/* EOF */
215
335
break;
216
336
}
217
337
if(ret < 0){
218
338
perror("gpgme_data_read");
219
return -1;
220
}
221
new_packet_length += ret;
222
}
223
224
/* FIXME: check characters before printing to screen so to not print
225
terminal control characters */
226
/* if(debug){ */
227
/* fprintf(stderr, "decrypted password is: "); */
228
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
229
/* fprintf(stderr, "\n"); */
230
/* } */
339
plaintext_length = -1;
340
goto decrypt_end;
341
}
342
plaintext_length += ret;
343
}
344
345
if(debug){
346
fprintf(stderr, "Decrypted password is: ");
347
for(ssize_t i = 0; i < plaintext_length; i++){
348
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
349
}
350
fprintf(stderr, "\n");
351
}
352
353
decrypt_end:
354
355
/* Delete the GPGME cryptotext data buffer */
356
gpgme_data_release(dh_crypto);
231
357
232
358
/* Delete the GPGME plaintext data buffer */
233
359
gpgme_data_release(dh_plain);
234
return new_packet_length;
360
return plaintext_length;
235
361
}
236
362
237
363
static const char * safer_gnutls_strerror (int value) {
238
const char *ret = gnutls_strerror (value);
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
239
365
if (ret == NULL)
240
366
ret = "(unknown)";
241
367
return ret;
242
368
}
243
369
244
void debuggnutls(__attribute__((unused)) int level,
245
const char* string){
246
fprintf(stderr, "%s", string);
370
/* GnuTLS log function callback */
371
static void debuggnutls(__attribute__((unused)) int level,
372
const char* string){
373
fprintf(stderr, "GnuTLS: %s", string);
247
374
}
248
375
249
int initgnutls(encrypted_session *es){
250
const char *err;
376
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
378
const char *seckeyfilename){
251
379
int ret;
252
380
253
381
if(debug){
254
382
fprintf(stderr, "Initializing GnuTLS\n");
255
383
}
256
384
257
if ((ret = gnutls_global_init ())
258
!= GNUTLS_E_SUCCESS) {
259
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
385
ret = gnutls_global_init();
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
260
389
return -1;
261
390
}
262
391
263
392
if (debug){
393
/* "Use a log level over 10 to enable all debugging options."
394
* - GnuTLS manual
395
*/
264
396
gnutls_global_set_log_level(11);
265
397
gnutls_global_set_log_function(debuggnutls);
266
398
}
267
399
268
/* openpgp credentials */
269
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
270
!= GNUTLS_E_SUCCESS) {
271
fprintf (stderr, "memory error: %s\n",
400
/* OpenPGP credentials */
401
gnutls_certificate_allocate_credentials(&mc->cred);
402
if (ret != GNUTLS_E_SUCCESS){
403
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
404
warning */
272
405
safer_gnutls_strerror(ret));
406
gnutls_global_deinit ();
273
407
return -1;
274
408
}
275
409
276
410
if(debug){
277
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
278
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
279
KEYFILE);
411
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
412
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
413
seckeyfilename);
280
414
}
281
415
282
416
ret = gnutls_certificate_set_openpgp_key_file
283
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
417
(mc->cred, pubkeyfilename, seckeyfilename,
418
GNUTLS_OPENPGP_FMT_BASE64);
284
419
if (ret != GNUTLS_E_SUCCESS) {
285
fprintf
286
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
287
" '%s')\n",
288
ret, CERTFILE, KEYFILE);
289
fprintf(stdout, "The Error is: %s\n",
420
fprintf(stderr,
421
"Error[%d] while reading the OpenPGP key pair ('%s',"
422
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
423
fprintf(stderr, "The GnuTLS error is: %s\n",
290
424
safer_gnutls_strerror(ret));
291
return -1;
292
}
293
294
//GnuTLS server initialization
295
if ((ret = gnutls_dh_params_init (&es->dh_params))
296
!= GNUTLS_E_SUCCESS) {
297
fprintf (stderr, "Error in dh parameter initialization: %s\n",
298
safer_gnutls_strerror(ret));
299
return -1;
300
}
301
302
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "Error in prime generation: %s\n",
305
safer_gnutls_strerror(ret));
306
return -1;
307
}
308
309
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
310
311
// GnuTLS session creation
312
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
313
!= GNUTLS_E_SUCCESS){
425
goto globalfail;
426
}
427
428
/* GnuTLS server initialization */
429
ret = gnutls_dh_params_init(&mc->dh_params);
430
if (ret != GNUTLS_E_SUCCESS) {
431
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
432
" %s\n", safer_gnutls_strerror(ret));
433
goto globalfail;
434
}
435
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
436
if (ret != GNUTLS_E_SUCCESS) {
437
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
438
safer_gnutls_strerror(ret));
439
goto globalfail;
440
}
441
442
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
443
444
return 0;
445
446
globalfail:
447
448
gnutls_certificate_free_credentials(mc->cred);
449
gnutls_global_deinit();
450
gnutls_dh_params_deinit(mc->dh_params);
451
return -1;
452
}
453
454
static int init_gnutls_session(mandos_context *mc,
455
gnutls_session_t *session){
456
int ret;
457
/* GnuTLS session creation */
458
ret = gnutls_init(session, GNUTLS_SERVER);
459
if (ret != GNUTLS_E_SUCCESS){
314
460
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
315
461
safer_gnutls_strerror(ret));
316
462
}
317
463
318
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
319
!= GNUTLS_E_SUCCESS) {
320
fprintf(stderr, "Syntax error at: %s\n", err);
321
fprintf(stderr, "GnuTLS error: %s\n",
322
safer_gnutls_strerror(ret));
323
return -1;
464
{
465
const char *err;
466
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
467
if (ret != GNUTLS_E_SUCCESS) {
468
fprintf(stderr, "Syntax error at: %s\n", err);
469
fprintf(stderr, "GnuTLS error: %s\n",
470
safer_gnutls_strerror(ret));
471
gnutls_deinit (*session);
472
return -1;
473
}
324
474
}
325
475
326
if ((ret = gnutls_credentials_set
327
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
328
!= GNUTLS_E_SUCCESS) {
329
fprintf(stderr, "Error setting a credentials set: %s\n",
476
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
477
mc->cred);
478
if (ret != GNUTLS_E_SUCCESS) {
479
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
330
480
safer_gnutls_strerror(ret));
481
gnutls_deinit (*session);
331
482
return -1;
332
483
}
333
484
334
485
/* ignore client certificate if any. */
335
gnutls_certificate_server_set_request (es->session,
486
gnutls_certificate_server_set_request (*session,
336
487
GNUTLS_CERT_IGNORE);
337
488
338
gnutls_dh_set_prime_bits (es->session, DH_BITS);
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
339
490
340
491
return 0;
341
492
}
342
493
343
void empty_log(__attribute__((unused)) AvahiLogLevel level,
344
__attribute__((unused)) const char *txt){}
494
/* Avahi log function callback */
495
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
496
__attribute__((unused)) const char *txt){}
345
497
346
int start_mandos_communication(const char *ip, uint16_t port,
347
unsigned int if_index){
498
/* Called when a Mandos server is found */
499
static int start_mandos_communication(const char *ip, uint16_t port,
500
AvahiIfIndex if_index,
501
mandos_context *mc){
348
502
int ret, tcp_sd;
349
struct sockaddr_in6 to;
350
encrypted_session es;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
351
504
char *buffer = NULL;
352
505
char *decrypted_buffer;
353
506
size_t buffer_length = 0;
354
507
size_t buffer_capacity = 0;
355
508
ssize_t decrypted_buffer_size;
356
size_t written = 0;
509
size_t written;
357
510
int retval = 0;
358
511
char interface[IF_NAMESIZE];
512
gnutls_session_t session;
513
514
ret = init_gnutls_session (mc, &session);
515
if (ret != 0){
516
return -1;
517
}
359
518
360
519
if(debug){
361
fprintf(stderr, "Setting up a tcp connection to %s\n", ip);
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
521
"\n", ip, port);
362
522
}
363
523
364
524
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
367
527
return -1;
368
528
}
369
529
370
if(if_indextoname(if_index, interface) == NULL){
371
if(debug){
530
if(debug){
531
if(if_indextoname((unsigned int)if_index, interface) == NULL){
372
532
perror("if_indextoname");
533
return -1;
373
534
}
374
return -1;
375
}
376
377
if(debug){
378
535
fprintf(stderr, "Binding to interface %s\n", interface);
379
536
}
380
537
381
memset(&to,0,sizeof(to)); /* Spurious warning */
382
to.sin6_family = AF_INET6;
383
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
538
memset(&to, 0, sizeof(to));
539
to.in6.sin6_family = AF_INET6;
540
/* It would be nice to have a way to detect if we were passed an
541
IPv4 address here. Now we assume an IPv6 address. */
542
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
384
543
if (ret < 0 ){
385
544
perror("inet_pton");
386
545
return -1;
387
}
546
}
388
547
if(ret == 0){
389
548
fprintf(stderr, "Bad address: %s\n", ip);
390
549
return -1;
391
550
}
392
to.sin6_port = htons(port); /* Spurious warning */
551
to.in6.sin6_port = htons(port); /* Spurious warning */
393
552
394
to.sin6_scope_id = (uint32_t)if_index;
553
to.in6.sin6_scope_id = (uint32_t)if_index;
395
554
396
555
if(debug){
397
fprintf(stderr, "Connection to: %s\n", ip);
556
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
557
port);
558
char addrstr[INET6_ADDRSTRLEN] = "";
559
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
560
sizeof(addrstr)) == NULL){
561
perror("inet_ntop");
562
} else {
563
if(strcmp(addrstr, ip) != 0){
564
fprintf(stderr, "Canonical address form: %s\n", addrstr);
565
}
566
}
398
567
}
399
568
400
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
569
ret = connect(tcp_sd, &to.in, sizeof(to));
401
570
if (ret < 0){
402
571
perror("connect");
403
572
return -1;
404
573
}
405
574
406
ret = initgnutls (&es);
407
if (ret != 0){
408
retval = -1;
409
return -1;
575
const char *out = mandos_protocol_version;
576
written = 0;
577
while (true){
578
size_t out_size = strlen(out);
579
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
580
out_size - written));
581
if (ret == -1){
582
perror("write");
583
retval = -1;
584
goto mandos_end;
585
}
586
written += (size_t)ret;
587
if(written < out_size){
588
continue;
589
} else {
590
if (out == mandos_protocol_version){
591
written = 0;
592
out = "\r\n";
593
} else {
594
break;
595
}
596
}
410
597
}
411
598
412
gnutls_transport_set_ptr (es.session,
413
(gnutls_transport_ptr_t) tcp_sd);
414
415
599
if(debug){
416
600
fprintf(stderr, "Establishing TLS session with %s\n", ip);
417
601
}
418
602
419
ret = gnutls_handshake (es.session);
603
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
604
605
do{
606
ret = gnutls_handshake (session);
607
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
420
608
421
609
if (ret != GNUTLS_E_SUCCESS){
422
610
if(debug){
423
fprintf(stderr, "\n*** Handshake failed ***\n");
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
424
612
gnutls_perror (ret);
425
613
}
426
614
retval = -1;
427
goto exit;
615
goto mandos_end;
428
616
}
429
617
430
//Retrieve OpenPGP packet that contains the wanted password
618
/* Read OpenPGP packet that contains the wanted password */
431
619
432
620
if(debug){
433
621
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
434
622
ip);
435
623
}
436
624
437
625
while(true){
438
if (buffer_length + BUFFER_SIZE > buffer_capacity){
439
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
440
if (buffer == NULL){
441
perror("realloc");
442
goto exit;
443
}
444
buffer_capacity += BUFFER_SIZE;
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
627
buffer_capacity);
628
if (buffer_capacity == 0){
629
perror("adjustbuffer");
630
retval = -1;
631
goto mandos_end;
445
632
}
446
633
447
ret = gnutls_record_recv
448
(es.session, buffer+buffer_length, BUFFER_SIZE);
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
449
636
if (ret == 0){
450
637
break;
451
638
}
455
642
case GNUTLS_E_AGAIN:
456
643
break;
457
644
case GNUTLS_E_REHANDSHAKE:
458
ret = gnutls_handshake (es.session);
645
do{
646
ret = gnutls_handshake (session);
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
459
648
if (ret < 0){
460
fprintf(stderr, "\n*** Handshake failed ***\n");
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
461
650
gnutls_perror (ret);
462
651
retval = -1;
463
goto exit;
652
goto mandos_end;
464
653
}
465
654
break;
466
655
default:
467
656
fprintf(stderr, "Unknown error while reading data from"
468
" encrypted session with mandos server\n");
657
" encrypted session with Mandos server\n");
469
658
retval = -1;
470
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
471
goto exit;
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
660
goto mandos_end;
472
661
}
473
662
} else {
474
663
buffer_length += (size_t) ret;
475
664
}
476
665
}
477
666
667
if(debug){
668
fprintf(stderr, "Closing TLS session\n");
669
}
670
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
672
478
673
if (buffer_length > 0){
479
decrypted_buffer_size = pgp_packet_decrypt(buffer,
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
480
675
buffer_length,
481
&decrypted_buffer,
482
CERT_ROOT);
676
&decrypted_buffer);
483
677
if (decrypted_buffer_size >= 0){
484
while(written < decrypted_buffer_size){
678
written = 0;
679
while(written < (size_t) decrypted_buffer_size){
485
680
ret = (int)fwrite (decrypted_buffer + written, 1,
486
681
(size_t)decrypted_buffer_size - written,
487
682
stdout);
499
694
} else {
500
695
retval = -1;
501
696
}
502
}
503
504
//shutdown procedure
505
506
if(debug){
507
fprintf(stderr, "Closing TLS session\n");
508
}
509
697
} else {
698
retval = -1;
699
}
700
701
/* Shutdown procedure */
702
703
mandos_end:
510
704
free(buffer);
511
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
512
exit:
513
close(tcp_sd);
514
gnutls_deinit (es.session);
515
gnutls_certificate_free_credentials (es.cred);
516
gnutls_global_deinit ();
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
706
if(ret == -1){
707
perror("close");
708
}
709
gnutls_deinit (session);
517
710
return retval;
518
711
}
519
712
520
static AvahiSimplePoll *simple_poll = NULL;
521
static AvahiServer *server = NULL;
522
523
static void resolve_callback(
524
AvahiSServiceResolver *r,
525
AvahiIfIndex interface,
526
AVAHI_GCC_UNUSED AvahiProtocol protocol,
527
AvahiResolverEvent event,
528
const char *name,
529
const char *type,
530
const char *domain,
531
const char *host_name,
532
const AvahiAddress *address,
533
uint16_t port,
534
AVAHI_GCC_UNUSED AvahiStringList *txt,
535
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
536
AVAHI_GCC_UNUSED void* userdata) {
537
538
assert(r); /* Spurious warning */
713
static void resolve_callback(AvahiSServiceResolver *r,
714
AvahiIfIndex interface,
715
AVAHI_GCC_UNUSED AvahiProtocol protocol,
716
AvahiResolverEvent event,
717
const char *name,
718
const char *type,
719
const char *domain,
720
const char *host_name,
721
const AvahiAddress *address,
722
uint16_t port,
723
AVAHI_GCC_UNUSED AvahiStringList *txt,
724
AVAHI_GCC_UNUSED AvahiLookupResultFlags
725
flags,
726
void* userdata) {
727
mandos_context *mc = userdata;
728
assert(r);
539
729
540
730
/* Called whenever a service has been resolved successfully or
541
731
timed out */
543
733
switch (event) {
544
734
default:
545
735
case AVAHI_RESOLVER_FAILURE:
546
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
547
" type '%s' in domain '%s': %s\n", name, type, domain,
548
avahi_strerror(avahi_server_errno(server)));
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
737
" of type '%s' in domain '%s': %s\n", name, type, domain,
738
avahi_strerror(avahi_server_errno(mc->server)));
549
739
break;
550
740
551
741
case AVAHI_RESOLVER_FOUND:
553
743
char ip[AVAHI_ADDRESS_STR_MAX];
554
744
avahi_address_snprint(ip, sizeof(ip), address);
555
745
if(debug){
556
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
557
" port %d\n", name, host_name, ip, port);
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
558
749
}
559
int ret = start_mandos_communication(ip, port,
560
(unsigned int) interface);
750
int ret = start_mandos_communication(ip, port, interface, mc);
561
751
if (ret == 0){
562
exit(EXIT_SUCCESS);
752
avahi_simple_poll_quit(mc->simple_poll);
563
753
}
564
754
}
565
755
}
566
756
avahi_s_service_resolver_free(r);
567
757
}
568
758
569
static void browse_callback(
570
AvahiSServiceBrowser *b,
571
AvahiIfIndex interface,
572
AvahiProtocol protocol,
573
AvahiBrowserEvent event,
574
const char *name,
575
const char *type,
576
const char *domain,
577
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
578
void* userdata) {
579
580
AvahiServer *s = userdata;
581
assert(b); /* Spurious warning */
582
583
/* Called whenever a new services becomes available on the LAN or
584
is removed from the LAN */
585
586
switch (event) {
587
default:
588
case AVAHI_BROWSER_FAILURE:
589
590
fprintf(stderr, "(Browser) %s\n",
591
avahi_strerror(avahi_server_errno(server)));
592
avahi_simple_poll_quit(simple_poll);
593
return;
594
595
case AVAHI_BROWSER_NEW:
596
/* We ignore the returned resolver object. In the callback
597
function we free it. If the server is terminated before
598
the callback function is called the server will free
599
the resolver for us. */
600
601
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
602
type, domain,
603
AVAHI_PROTO_INET6, 0,
604
resolve_callback, s)))
605
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
606
avahi_strerror(avahi_server_errno(s)));
607
break;
608
609
case AVAHI_BROWSER_REMOVE:
610
break;
611
612
case AVAHI_BROWSER_ALL_FOR_NOW:
613
case AVAHI_BROWSER_CACHE_EXHAUSTED:
614
break;
759
static void browse_callback( AvahiSServiceBrowser *b,
760
AvahiIfIndex interface,
761
AvahiProtocol protocol,
762
AvahiBrowserEvent event,
763
const char *name,
764
const char *type,
765
const char *domain,
766
AVAHI_GCC_UNUSED AvahiLookupResultFlags
767
flags,
768
void* userdata) {
769
mandos_context *mc = userdata;
770
assert(b);
771
772
/* Called whenever a new services becomes available on the LAN or
773
is removed from the LAN */
774
775
switch (event) {
776
default:
777
case AVAHI_BROWSER_FAILURE:
778
779
fprintf(stderr, "(Avahi browser) %s\n",
780
avahi_strerror(avahi_server_errno(mc->server)));
781
avahi_simple_poll_quit(mc->simple_poll);
782
return;
783
784
case AVAHI_BROWSER_NEW:
785
/* We ignore the returned Avahi resolver object. In the callback
786
function we free it. If the Avahi server is terminated before
787
the callback function is called the Avahi server will free the
788
resolver for us. */
789
790
if (!(avahi_s_service_resolver_new(mc->server, interface,
791
protocol, name, type, domain,
792
AVAHI_PROTO_INET6, 0,
793
resolve_callback, mc)))
794
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
795
name, avahi_strerror(avahi_server_errno(mc->server)));
796
break;
797
798
case AVAHI_BROWSER_REMOVE:
799
break;
800
801
case AVAHI_BROWSER_ALL_FOR_NOW:
802
case AVAHI_BROWSER_CACHE_EXHAUSTED:
803
if(debug){
804
fprintf(stderr, "No Mandos server found, still searching...\n");
615
805
}
806
break;
807
}
616
808
}
617
809
618
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
619
AvahiServerConfig config;
810
int main(int argc, char *argv[]){
620
811
AvahiSServiceBrowser *sb = NULL;
621
812
int error;
622
813
int ret;
623
int returncode = EXIT_SUCCESS;
814
int exitcode = EXIT_SUCCESS;
624
815
const char *interface = "eth0";
625
626
while (true){
627
static struct option long_options[] = {
628
{"debug", no_argument, (int *)&debug, 1},
629
{"interface", required_argument, 0, 'i'},
630
{0, 0, 0, 0} };
631
632
int option_index = 0;
633
ret = getopt_long (argc, argv, "i:", long_options,
634
&option_index);
635
636
if (ret == -1){
637
break;
638
}
639
640
switch(ret){
641
case 0:
642
break;
643
case 'i':
644
interface = optarg;
645
break;
646
default:
647
exit(EXIT_FAILURE);
648
}
816
struct ifreq network;
817
int sd;
818
uid_t uid;
819
gid_t gid;
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
831
832
{
833
struct argp_option options[] = {
834
{ .name = "debug", .key = 128,
835
.doc = "Debug mode", .group = 3 },
836
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
839
.group = 1 },
840
{ .name = "interface", .key = 'i',
841
.arg = "NAME",
842
.doc = "Interface that will be used to search for Mandos"
843
" servers",
844
.group = 1 },
845
{ .name = "seckey", .key = 's',
846
.arg = "FILE",
847
.doc = "OpenPGP secret key file base name",
848
.group = 1 },
849
{ .name = "pubkey", .key = 'p',
850
.arg = "FILE",
851
.doc = "OpenPGP public key file base name",
852
.group = 2 },
853
{ .name = "dh-bits", .key = 129,
854
.arg = "BITS",
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
857
.group = 2 },
858
{ .name = "priority", .key = 130,
859
.arg = "STRING",
860
.doc = "GnuTLS priority string for the TLS handshake",
861
.group = 1 },
862
{ .name = NULL }
863
};
864
865
error_t parse_opt (int key, char *arg,
866
struct argp_state *state) {
867
/* Get the INPUT argument from `argp_parse', which we know is
868
a pointer to our plugin list pointer. */
869
switch (key) {
870
case 128: /* --debug */
871
debug = true;
872
break;
873
case 'c': /* --connect */
874
connect_to = arg;
875
break;
876
case 'i': /* --interface */
877
interface = arg;
878
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
889
perror("strtol");
890
exit(EXIT_FAILURE);
891
}
892
break;
893
case 130: /* --priority */
894
mc.priority = arg;
895
break;
896
case ARGP_KEY_ARG:
897
argp_usage (state);
898
case ARGP_KEY_END:
899
break;
900
default:
901
return ARGP_ERR_UNKNOWN;
902
}
903
return 0;
904
}
905
906
struct argp argp = { .options = options, .parser = parse_opt,
907
.args_doc = "",
908
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
914
goto end;
915
}
916
}
917
918
/* If the interface is down, bring it up */
919
{
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
921
if(sd < 0) {
922
perror("socket");
923
exitcode = EXIT_FAILURE;
924
goto end;
925
}
926
strcpy(network.ifr_name, interface);
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
928
if(ret == -1){
929
perror("ioctl SIOCGIFFLAGS");
930
exitcode = EXIT_FAILURE;
931
goto end;
932
}
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
936
if(ret == -1){
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
939
goto end;
940
}
941
}
942
ret = TEMP_FAILURE_RETRY(close(sd));
943
if(ret == -1){
944
perror("close");
945
}
946
}
947
948
uid = getuid();
949
gid = getgid();
950
951
ret = setuid(uid);
952
if (ret == -1){
953
perror("setuid");
954
}
955
956
setgid(gid);
957
if (ret == -1){
958
perror("setgid");
959
}
960
961
ret = init_gnutls_global(&mc, pubkey, seckey);
962
if (ret == -1){
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
965
goto end;
966
} else {
967
gnutls_initalized = true;
968
}
969
970
if(mkdtemp(tempdir) == NULL){
971
perror("mkdtemp");
972
tempdir[0] = '\0';
973
goto end;
974
}
975
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
979
goto end;
980
} else {
981
gpgme_initalized = true;
982
}
983
984
if_index = (AvahiIfIndex) if_nametoindex(interface);
985
if(if_index == 0){
986
fprintf(stderr, "No such interface: \"%s\"\n", interface);
987
exit(EXIT_FAILURE);
988
}
989
990
if(connect_to != NULL){
991
/* Connect directly, do not use Zeroconf */
992
/* (Mainly meant for debugging) */
993
char *address = strrchr(connect_to, ':');
994
if(address == NULL){
995
fprintf(stderr, "No colon in address\n");
996
exitcode = EXIT_FAILURE;
997
goto end;
998
}
999
errno = 0;
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1001
if(errno){
1002
perror("Bad port number");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
*address = '\0';
1007
address = connect_to;
1008
ret = start_mandos_communication(address, port, if_index, &mc);
1009
if(ret < 0){
1010
exitcode = EXIT_FAILURE;
1011
} else {
1012
exitcode = EXIT_SUCCESS;
1013
}
1014
goto end;
649
1015
}
650
1016
651
1017
if (not debug){
652
1018
avahi_set_log_function(empty_log);
653
1019
}
654
1020
655
/* Initialize the psuedo-RNG */
1021
/* Initialize the pseudo-RNG for Avahi */
656
1022
srand((unsigned int) time(NULL));
657
658
/* Allocate main loop object */
659
if (!(simple_poll = avahi_simple_poll_new())) {
660
fprintf(stderr, "Failed to create simple poll object.\n");
661
662
goto exit;
663
}
664
665
/* Do not publish any local records */
666
avahi_server_config_init(&config);
667
config.publish_hinfo = 0;
668
config.publish_addresses = 0;
669
config.publish_workstation = 0;
670
config.publish_domain = 0;
671
672
/* Allocate a new server */
673
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
674
&config, NULL, NULL, &error);
675
676
/* Free the configuration data */
677
avahi_server_config_free(&config);
678
679
/* Check if creating the server object succeeded */
680
if (!server) {
681
fprintf(stderr, "Failed to create server: %s\n",
1023
1024
/* Allocate main Avahi loop object */
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if (mc.simple_poll == NULL) {
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1028
" object.\n");
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
{
1034
AvahiServerConfig config;
1035
/* Do not publish any local Zeroconf records */
1036
avahi_server_config_init(&config);
1037
config.publish_hinfo = 0;
1038
config.publish_addresses = 0;
1039
config.publish_workstation = 0;
1040
config.publish_domain = 0;
1041
1042
/* Allocate a new server */
1043
mc.server = avahi_server_new(avahi_simple_poll_get
1044
(mc.simple_poll), &config, NULL,
1045
NULL, &error);
1046
1047
/* Free the Avahi configuration data */
1048
avahi_server_config_free(&config);
1049
}
1050
1051
/* Check if creating the Avahi server object succeeded */
1052
if (mc.server == NULL) {
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
682
1054
avahi_strerror(error));
683
returncode = EXIT_FAILURE;
684
goto exit;
1055
exitcode = EXIT_FAILURE;
1056
goto end;
685
1057
}
686
1058
687
/* Create the service browser */
688
sb = avahi_s_service_browser_new(server,
689
(AvahiIfIndex)
690
if_nametoindex(interface),
1059
/* Create the Avahi service browser */
1060
sb = avahi_s_service_browser_new(mc.server, if_index,
691
1061
AVAHI_PROTO_INET6,
692
1062
"_mandos._tcp", NULL, 0,
693
browse_callback, server);
694
if (!sb) {
1063
browse_callback, &mc);
1064
if (sb == NULL) {
695
1065
fprintf(stderr, "Failed to create service browser: %s\n",
696
avahi_strerror(avahi_server_errno(server)));
697
returncode = EXIT_FAILURE;
698
goto exit;
1066
avahi_strerror(avahi_server_errno(mc.server)));
1067
exitcode = EXIT_FAILURE;
1068
goto end;
699
1069
}
700
1070
701
1071
/* Run the main loop */
702
1072
703
1073
if (debug){
704
fprintf(stderr, "Starting avahi loop search\n");
1074
fprintf(stderr, "Starting Avahi loop search\n");
705
1075
}
706
1076
707
avahi_simple_poll_loop(simple_poll);
708
709
exit:
710
1077
avahi_simple_poll_loop(mc.simple_poll);
1078
1079
end:
1080
711
1081
if (debug){
712
1082
fprintf(stderr, "%s exiting\n", argv[0]);
713
1083
}
714
1084
715
1085
/* Cleanup things */
716
if (sb)
1086
if (sb != NULL)
717
1087
avahi_s_service_browser_free(sb);
718
1088
719
if (server)
720
avahi_server_free(server);
721
722
if (simple_poll)
723
avahi_simple_poll_free(simple_poll);
724
725
return returncode;
1089
if (mc.server != NULL)
1090
avahi_server_free(mc.server);
1091
1092
if (mc.simple_poll != NULL)
1093
avahi_simple_poll_free(mc.simple_poll);
1094
1095
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1097
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1099
}
1100
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1103
}
1104
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1107
DIR *d;
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1110
if(d == NULL){
1111
perror("opendir");
1112
} else {
1113
while(true){
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1116
break;
1117
}
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1121
direntry->d_name);
1122
if(ret < 0){
1123
perror("asprintf");
1124
continue;
1125
}
1126
ret = unlink(fullname);
1127
if(ret == -1){
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1130
}
1131
free(fullname);
1132
}
1133
}
1134
closedir(d);
1135
}
1136
ret = rmdir(tempdir);
1137
if(ret == -1){
1138
perror("rmdir");
1139
}
1140
}
1141
1142
return exitcode;
726
1143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0