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- Committer: Björn Påhlsson
- Date: 2008-08-03 16:08:20 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 41.
- Revision ID: belorn@braxen-20080803160820-0tw2n3ufebh51e3i
Added support for protocol version handling
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
12
* Copyright © 2007-2008 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
32
32
#define _LARGEFILE_SOURCE
33
33
#define _FILE_OFFSET_BITS 64
34
34
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_* */
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
43
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
44
79
45
#include <avahi-core/core.h>
80
46
#include <avahi-core/lookup.h>
81
47
#include <avahi-core/log.h>
83
49
#include <avahi-common/malloc.h>
84
50
#include <avahi-common/error.h>
85
51
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_* */
52
//mandos client part
53
#include <sys/types.h> /* socket(), inet_pton() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton() */
56
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
57
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
58
59
#include <unistd.h> /* close() */
60
#include <netinet/in.h>
61
#include <stdbool.h> /* true */
62
#include <string.h> /* memset */
63
#include <arpa/inet.h> /* inet_pton() */
64
#include <iso646.h> /* not */
65
66
// gpgme
67
#include <errno.h> /* perror() */
68
#include <gpgme.h>
69
70
// getopt long
71
#include <getopt.h>
101
72
102
73
#define BUFFER_SIZE 256
74
#define DH_BITS 1024
103
75
104
#define PATHDIR "/conf/conf.d/mandos"
105
#define SECKEY "seckey.txt"
106
#define PUBKEY "pubkey.txt"
76
static const char *certdir = "/conf/conf.d/mandos";
77
static const char *certfile = "openpgp-client.txt";
78
static const char *certkey = "openpgp-client-key.txt";
107
79
108
80
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>";
112
113
/* Used for passing in values through the Avahi callback functions */
81
82
const char mandos_protocol_version[] = "1";
83
114
84
typedef struct {
115
85
AvahiSimplePoll *simple_poll;
116
86
AvahiServer *server;
117
87
gnutls_certificate_credentials_t cred;
118
88
unsigned int dh_bits;
119
gnutls_dh_params_t dh_params;
120
89
const char *priority;
121
gpgme_ctx_t ctx;
122
90
} mandos_context;
123
91
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,
92
size_t adjustbuffer(char *buffer, size_t buffer_length,
130
93
size_t buffer_capacity){
131
94
if (buffer_length + BUFFER_SIZE > buffer_capacity){
132
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
95
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
133
96
if (buffer == NULL){
134
97
return 0;
135
98
}
138
101
return buffer_capacity;
139
102
}
140
103
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;
104
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
105
char **new_packet,
106
const char *homedir){
107
gpgme_data_t dh_crypto, dh_plain;
108
gpgme_ctx_t ctx;
147
109
gpgme_error_t rc;
110
ssize_t ret;
111
size_t new_packet_capacity = 0;
112
ssize_t new_packet_length = 0;
148
113
gpgme_engine_info_t engine_info;
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
114
186
115
if (debug){
187
fprintf(stderr, "Initialize gpgme\n");
116
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
188
117
}
189
118
190
119
/* Init GPGME */
193
122
if (rc != GPG_ERR_NO_ERROR){
194
123
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
195
124
gpgme_strsource(rc), gpgme_strerror(rc));
196
return false;
125
return -1;
197
126
}
198
127
199
/* Set GPGME home directory for the OpenPGP engine only */
128
/* Set GPGME home directory */
200
129
rc = gpgme_get_engine_info (&engine_info);
201
130
if (rc != GPG_ERR_NO_ERROR){
202
131
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
203
132
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
133
return -1;
205
134
}
206
135
while(engine_info != NULL){
207
136
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
208
137
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
209
engine_info->file_name, tempdir);
138
engine_info->file_name, homedir);
210
139
break;
211
140
}
212
141
engine_info = engine_info->next;
213
142
}
214
143
if(engine_info == NULL){
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);
144
fprintf(stderr, "Could not set home dir to %s\n", homedir);
145
return -1;
146
}
147
148
/* Create new GPGME data buffer from packet buffer */
149
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
255
150
if (rc != GPG_ERR_NO_ERROR){
256
151
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
257
152
gpgme_strsource(rc), gpgme_strerror(rc));
263
158
if (rc != GPG_ERR_NO_ERROR){
264
159
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
265
160
gpgme_strsource(rc), gpgme_strerror(rc));
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);
161
return -1;
162
}
163
164
/* Create new GPGME "context" */
165
rc = gpgme_new(&ctx);
166
if (rc != GPG_ERR_NO_ERROR){
167
fprintf(stderr, "bad gpgme_new: %s: %s\n",
168
gpgme_strsource(rc), gpgme_strerror(rc));
169
return -1;
170
}
171
172
/* Decrypt data from the FILE pointer to the plaintext data
173
buffer */
174
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
273
175
if (rc != GPG_ERR_NO_ERROR){
274
176
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
275
177
gpgme_strsource(rc), gpgme_strerror(rc));
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
}
178
return -1;
179
}
180
181
if(debug){
182
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
183
}
184
185
if (debug){
186
gpgme_decrypt_result_t result;
187
result = gpgme_op_decrypt_result(ctx);
188
if (result == NULL){
189
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
190
} else {
191
fprintf(stderr, "Unsupported algorithm: %s\n",
192
result->unsupported_algorithm);
193
fprintf(stderr, "Wrong key usage: %d\n",
194
result->wrong_key_usage);
195
if(result->file_name != NULL){
196
fprintf(stderr, "File name: %s\n", result->file_name);
197
}
198
gpgme_recipient_t recipient;
199
recipient = result->recipients;
200
if(recipient){
201
while(recipient != NULL){
202
fprintf(stderr, "Public key algorithm: %s\n",
203
gpgme_pubkey_algo_name(recipient->pubkey_algo));
204
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
205
fprintf(stderr, "Secret key available: %s\n",
206
recipient->status == GPG_ERR_NO_SECKEY
207
? "No" : "Yes");
208
recipient = recipient->next;
302
209
}
303
210
}
304
211
}
305
goto decrypt_end;
306
212
}
307
213
308
if(debug){
309
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
310
}
214
/* Delete the GPGME FILE pointer cryptotext data buffer */
215
gpgme_data_release(dh_crypto);
311
216
312
217
/* Seek back to the beginning of the GPGME plaintext data buffer */
313
218
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;
219
perror("pgpme_data_seek");
317
220
}
318
221
319
*plaintext = NULL;
222
*new_packet = 0;
320
223
while(true){
321
plaintext_capacity = adjustbuffer(plaintext,
322
(size_t)plaintext_length,
323
plaintext_capacity);
324
if (plaintext_capacity == 0){
224
new_packet_capacity = adjustbuffer(*new_packet, new_packet_length,
225
new_packet_capacity);
226
if (new_packet_capacity == 0){
325
227
perror("adjustbuffer");
326
plaintext_length = -1;
327
goto decrypt_end;
228
return -1;
229
}
230
new_packet_capacity += BUFFER_SIZE;
328
231
}
329
232
330
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
233
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
331
234
BUFFER_SIZE);
332
235
/* Print the data, if any */
333
236
if (ret == 0){
334
/* EOF */
335
237
break;
336
238
}
337
239
if(ret < 0){
338
240
perror("gpgme_data_read");
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);
241
return -1;
242
}
243
new_packet_length += ret;
244
}
245
246
/* FIXME: check characters before printing to screen so to not print
247
terminal control characters */
248
/* if(debug){ */
249
/* fprintf(stderr, "decrypted password is: "); */
250
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
251
/* fprintf(stderr, "\n"); */
252
/* } */
357
253
358
254
/* Delete the GPGME plaintext data buffer */
359
255
gpgme_data_release(dh_plain);
360
return plaintext_length;
256
return new_packet_length;
361
257
}
362
258
363
259
static const char * safer_gnutls_strerror (int value) {
364
const char *ret = gnutls_strerror (value); /* Spurious warning */
260
const char *ret = gnutls_strerror (value);
365
261
if (ret == NULL)
366
262
ret = "(unknown)";
367
263
return ret;
368
264
}
369
265
370
/* GnuTLS log function callback */
371
266
static void debuggnutls(__attribute__((unused)) int level,
372
267
const char* string){
373
fprintf(stderr, "GnuTLS: %s", string);
268
fprintf(stderr, "%s", string);
374
269
}
375
270
376
static int init_gnutls_global(mandos_context *mc,
377
const char *pubkeyfilename,
378
const char *seckeyfilename){
271
static int initgnutls(mandos_context *mc){
272
const char *err;
379
273
int ret;
380
274
381
275
if(debug){
382
276
fprintf(stderr, "Initializing GnuTLS\n");
383
277
}
384
385
ret = gnutls_global_init();
386
if (ret != GNUTLS_E_SUCCESS) {
387
fprintf (stderr, "GnuTLS global_init: %s\n",
388
safer_gnutls_strerror(ret));
278
279
if ((ret = gnutls_global_init ())
280
!= GNUTLS_E_SUCCESS) {
281
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
389
282
return -1;
390
283
}
391
284
392
285
if (debug){
393
/* "Use a log level over 10 to enable all debugging options."
394
* - GnuTLS manual
395
*/
396
286
gnutls_global_set_log_level(11);
397
287
gnutls_global_set_log_function(debuggnutls);
398
288
}
399
289
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 */
290
/* openpgp credentials */
291
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
292
!= GNUTLS_E_SUCCESS) {
293
fprintf (stderr, "memory error: %s\n",
405
294
safer_gnutls_strerror(ret));
406
gnutls_global_deinit ();
407
295
return -1;
408
296
}
409
297
410
298
if(debug){
411
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
412
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
413
seckeyfilename);
299
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
300
" and keyfile %s as GnuTLS credentials\n", certfile,
301
certkey);
414
302
}
415
303
416
304
ret = gnutls_certificate_set_openpgp_key_file
417
(mc->cred, pubkeyfilename, seckeyfilename,
418
GNUTLS_OPENPGP_FMT_BASE64);
305
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
419
306
if (ret != GNUTLS_E_SUCCESS) {
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",
307
fprintf
308
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
309
" '%s')\n",
310
ret, certfile, certkey);
311
fprintf(stdout, "The Error is: %s\n",
424
312
safer_gnutls_strerror(ret));
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){
313
return -1;
314
}
315
316
//GnuTLS server initialization
317
if ((ret = gnutls_dh_params_init (&es->dh_params))
318
!= GNUTLS_E_SUCCESS) {
319
fprintf (stderr, "Error in dh parameter initialization: %s\n",
320
safer_gnutls_strerror(ret));
321
return -1;
322
}
323
324
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
325
!= GNUTLS_E_SUCCESS) {
326
fprintf (stderr, "Error in prime generation: %s\n",
327
safer_gnutls_strerror(ret));
328
return -1;
329
}
330
331
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
332
333
// GnuTLS session creation
334
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
335
!= GNUTLS_E_SUCCESS){
460
336
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
461
337
safer_gnutls_strerror(ret));
462
338
}
463
339
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
}
340
if ((ret = gnutls_priority_set_direct (es->session, mc->priority, &err))
341
!= GNUTLS_E_SUCCESS) {
342
fprintf(stderr, "Syntax error at: %s\n", err);
343
fprintf(stderr, "GnuTLS error: %s\n",
344
safer_gnutls_strerror(ret));
345
return -1;
474
346
}
475
347
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",
348
if ((ret = gnutls_credentials_set
349
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
350
!= GNUTLS_E_SUCCESS) {
351
fprintf(stderr, "Error setting a credentials set: %s\n",
480
352
safer_gnutls_strerror(ret));
481
gnutls_deinit (*session);
482
353
return -1;
483
354
}
484
355
485
356
/* ignore client certificate if any. */
486
gnutls_certificate_server_set_request (*session,
357
gnutls_certificate_server_set_request (es->session,
487
358
GNUTLS_CERT_IGNORE);
488
359
489
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
360
gnutls_dh_set_prime_bits (es->session, DH_BITS);
490
361
491
362
return 0;
492
363
}
493
364
494
/* Avahi log function callback */
495
365
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
496
366
__attribute__((unused)) const char *txt){}
497
367
498
/* Called when a Mandos server is found */
499
368
static int start_mandos_communication(const char *ip, uint16_t port,
500
369
AvahiIfIndex if_index,
501
370
mandos_context *mc){
502
371
int ret, tcp_sd;
503
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
372
struct sockaddr_in6 to;
373
encrypted_session es;
504
374
char *buffer = NULL;
505
375
char *decrypted_buffer;
506
376
size_t buffer_length = 0;
509
379
size_t written;
510
380
int retval = 0;
511
381
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
}
518
382
519
383
if(debug){
520
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
521
"\n", ip, port);
384
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
385
ip, port);
522
386
}
523
387
524
388
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
526
390
perror("socket");
527
391
return -1;
528
392
}
529
393
530
394
if(debug){
531
395
if(if_indextoname((unsigned int)if_index, interface) == NULL){
532
perror("if_indextoname");
396
if(debug){
397
perror("if_indextoname");
398
}
533
399
return -1;
534
400
}
401
535
402
fprintf(stderr, "Binding to interface %s\n", interface);
536
403
}
537
404
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);
405
memset(&to,0,sizeof(to)); /* Spurious warning */
406
to.sin6_family = AF_INET6;
407
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
543
408
if (ret < 0 ){
544
409
perror("inet_pton");
545
410
return -1;
546
}
411
}
547
412
if(ret == 0){
548
413
fprintf(stderr, "Bad address: %s\n", ip);
549
414
return -1;
550
415
}
551
to.in6.sin6_port = htons(port); /* Spurious warning */
416
to.sin6_port = htons(port); /* Spurious warning */
552
417
553
to.in6.sin6_scope_id = (uint32_t)if_index;
418
to.sin6_scope_id = (uint32_t)if_index;
554
419
555
420
if(debug){
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
}
421
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
422
/* char addrstr[INET6_ADDRSTRLEN]; */
423
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
424
/* sizeof(addrstr)) == NULL){ */
425
/* perror("inet_ntop"); */
426
/* } else { */
427
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
428
/* addrstr, ntohs(to.sin6_port)); */
429
/* } */
567
430
}
568
431
569
ret = connect(tcp_sd, &to.in, sizeof(to));
432
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
570
433
if (ret < 0){
571
434
perror("connect");
572
435
return -1;
573
436
}
574
575
const char *out = mandos_protocol_version;
437
438
char *out = mandos_protocol_version;
576
439
written = 0;
577
440
while (true){
578
441
size_t out_size = strlen(out);
581
444
if (ret == -1){
582
445
perror("write");
583
446
retval = -1;
584
goto mandos_end;
447
goto end;
585
448
}
586
written += (size_t)ret;
449
written += ret;
587
450
if(written < out_size){
588
451
continue;
589
452
} else {
595
458
}
596
459
}
597
460
}
461
462
ret = initgnutls (&es);
463
if (ret != 0){
464
retval = -1;
465
return -1;
466
}
467
468
gnutls_transport_set_ptr (es.session,
469
(gnutls_transport_ptr_t) tcp_sd);
598
470
599
471
if(debug){
600
472
fprintf(stderr, "Establishing TLS session with %s\n", ip);
601
473
}
602
474
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);
475
ret = gnutls_handshake (es.session);
608
476
609
477
if (ret != GNUTLS_E_SUCCESS){
610
478
if(debug){
611
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
479
fprintf(stderr, "\n*** Handshake failed ***\n");
612
480
gnutls_perror (ret);
613
481
}
614
482
retval = -1;
615
goto mandos_end;
483
goto exit;
616
484
}
617
485
618
/* Read OpenPGP packet that contains the wanted password */
486
//Retrieve OpenPGP packet that contains the wanted password
619
487
620
488
if(debug){
621
489
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
622
490
ip);
623
491
}
624
492
625
493
while(true){
626
buffer_capacity = adjustbuffer(&buffer, buffer_length,
627
buffer_capacity);
494
buffer_capacity = adjustbuffer(buffer, buffer_length, buffer_capacity);
628
495
if (buffer_capacity == 0){
629
496
perror("adjustbuffer");
630
497
retval = -1;
631
goto mandos_end;
498
goto exit;
632
499
}
633
500
634
ret = gnutls_record_recv(session, buffer+buffer_length,
635
BUFFER_SIZE);
501
ret = gnutls_record_recv
502
(es.session, buffer+buffer_length, BUFFER_SIZE);
636
503
if (ret == 0){
637
504
break;
638
505
}
642
509
case GNUTLS_E_AGAIN:
643
510
break;
644
511
case GNUTLS_E_REHANDSHAKE:
645
do{
646
ret = gnutls_handshake (session);
647
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
512
ret = gnutls_handshake (es.session);
648
513
if (ret < 0){
649
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
514
fprintf(stderr, "\n*** Handshake failed ***\n");
650
515
gnutls_perror (ret);
651
516
retval = -1;
652
goto mandos_end;
517
goto exit;
653
518
}
654
519
break;
655
520
default:
656
521
fprintf(stderr, "Unknown error while reading data from"
657
" encrypted session with Mandos server\n");
522
" encrypted session with mandos server\n");
658
523
retval = -1;
659
gnutls_bye (session, GNUTLS_SHUT_RDWR);
660
goto mandos_end;
524
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
525
goto exit;
661
526
}
662
527
} else {
663
528
buffer_length += (size_t) ret;
664
529
}
665
530
}
666
531
667
if(debug){
668
fprintf(stderr, "Closing TLS session\n");
669
}
670
671
gnutls_bye (session, GNUTLS_SHUT_RDWR);
672
673
532
if (buffer_length > 0){
674
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
533
decrypted_buffer_size = pgp_packet_decrypt(buffer,
675
534
buffer_length,
676
&decrypted_buffer);
535
&decrypted_buffer,
536
certdir);
677
537
if (decrypted_buffer_size >= 0){
678
538
written = 0;
679
539
while(written < (size_t) decrypted_buffer_size){
694
554
} else {
695
555
retval = -1;
696
556
}
697
} else {
698
retval = -1;
699
}
700
701
/* Shutdown procedure */
702
703
mandos_end:
557
}
558
559
//shutdown procedure
560
561
if(debug){
562
fprintf(stderr, "Closing TLS session\n");
563
}
564
704
565
free(buffer);
705
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
706
if(ret == -1){
707
perror("close");
708
}
709
gnutls_deinit (session);
566
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
567
exit:
568
close(tcp_sd);
569
gnutls_deinit (es.session);
570
gnutls_certificate_free_credentials (es.cred);
571
gnutls_global_deinit ();
710
572
return retval;
711
573
}
712
574
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) {
575
static void resolve_callback( AvahiSServiceResolver *r,
576
AvahiIfIndex interface,
577
AVAHI_GCC_UNUSED AvahiProtocol protocol,
578
AvahiResolverEvent event,
579
const char *name,
580
const char *type,
581
const char *domain,
582
const char *host_name,
583
const AvahiAddress *address,
584
uint16_t port,
585
AVAHI_GCC_UNUSED AvahiStringList *txt,
586
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
587
AVAHI_GCC_UNUSED void* userdata) {
727
588
mandos_context *mc = userdata;
728
assert(r);
589
assert(r); /* Spurious warning */
729
590
730
591
/* Called whenever a service has been resolved successfully or
731
592
timed out */
733
594
switch (event) {
734
595
default:
735
596
case AVAHI_RESOLVER_FAILURE:
736
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
737
" of type '%s' in domain '%s': %s\n", name, type, domain,
597
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
598
" type '%s' in domain '%s': %s\n", name, type, domain,
738
599
avahi_strerror(avahi_server_errno(mc->server)));
739
600
break;
740
601
743
604
char ip[AVAHI_ADDRESS_STR_MAX];
744
605
avahi_address_snprint(ip, sizeof(ip), address);
745
606
if(debug){
746
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
747
PRIu16 ") on port %d\n", name, host_name, ip,
748
interface, port);
607
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
608
" port %d\n", name, host_name, ip, port);
749
609
}
750
610
int ret = start_mandos_communication(ip, port, interface, mc);
751
611
if (ret == 0){
752
avahi_simple_poll_quit(mc->simple_poll);
612
exit(EXIT_SUCCESS);
753
613
}
754
614
}
755
615
}
763
623
const char *name,
764
624
const char *type,
765
625
const char *domain,
766
AVAHI_GCC_UNUSED AvahiLookupResultFlags
767
flags,
626
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
768
627
void* userdata) {
769
628
mandos_context *mc = userdata;
770
assert(b);
629
assert(b); /* Spurious warning */
771
630
772
631
/* Called whenever a new services becomes available on the LAN or
773
632
is removed from the LAN */
775
634
switch (event) {
776
635
default:
777
636
case AVAHI_BROWSER_FAILURE:
778
779
fprintf(stderr, "(Avahi browser) %s\n",
637
638
fprintf(stderr, "(Browser) %s\n",
780
639
avahi_strerror(avahi_server_errno(mc->server)));
781
640
avahi_simple_poll_quit(mc->simple_poll);
782
641
return;
783
642
784
643
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,
644
/* We ignore the returned resolver object. In the callback
645
function we free it. If the server is terminated before
646
the callback function is called the server will free
647
the resolver for us. */
648
649
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
650
type, domain,
792
651
AVAHI_PROTO_INET6, 0,
793
652
resolve_callback, mc)))
794
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
795
name, avahi_strerror(avahi_server_errno(mc->server)));
653
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
654
avahi_strerror(avahi_server_errno(s)));
796
655
break;
797
656
798
657
case AVAHI_BROWSER_REMOVE:
799
658
break;
800
659
801
660
case AVAHI_BROWSER_ALL_FOR_NOW:
802
661
case AVAHI_BROWSER_CACHE_EXHAUSTED:
803
if(debug){
804
fprintf(stderr, "No Mandos server found, still searching...\n");
805
}
806
662
break;
807
663
}
808
664
}
809
665
810
int main(int argc, char *argv[]){
666
/* Combines file name and path and returns the malloced new
667
string. some sane checks could/should be added */
668
static const char *combinepath(const char *first, const char *second){
669
size_t f_len = strlen(first);
670
size_t s_len = strlen(second);
671
char *tmp = malloc(f_len + s_len + 2);
672
if (tmp == NULL){
673
return NULL;
674
}
675
if(f_len > 0){
676
memcpy(tmp, first, f_len);
677
}
678
tmp[f_len] = '/';
679
if(s_len > 0){
680
memcpy(tmp + f_len + 1, second, s_len);
681
}
682
tmp[f_len + 1 + s_len] = '\0';
683
return tmp;
684
}
685
686
687
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
688
AvahiServerConfig config;
811
689
AvahiSServiceBrowser *sb = NULL;
812
690
int error;
813
691
int ret;
814
int exitcode = EXIT_SUCCESS;
692
int returncode = EXIT_SUCCESS;
815
693
const char *interface = "eth0";
816
694
struct ifreq network;
817
695
int sd;
818
uid_t uid;
819
gid_t gid;
820
696
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
697
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
825
826
698
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;
699
.dh_bits = 2048, .priority = "SECURE256"};
831
700
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 */
701
while (true){
702
static struct option long_options[] = {
703
{"debug", no_argument, (int *)&debug, 1},
704
{"connect", required_argument, 0, 'C'},
705
{"interface", required_argument, 0, 'i'},
706
{"certdir", required_argument, 0, 'd'},
707
{"certkey", required_argument, 0, 'c'},
708
{"certfile", required_argument, 0, 'k'},
709
{"dh_bits", required_argument, 0, 'D'},
710
{"priority", required_argument, 0, 'p'},
711
{0, 0, 0, 0} };
712
713
int option_index = 0;
714
ret = getopt_long (argc, argv, "i:", long_options,
715
&option_index);
716
717
if (ret == -1){
718
break;
719
}
720
721
switch(ret){
722
case 0:
723
break;
724
case 'i':
725
interface = optarg;
726
break;
727
case 'C':
728
connect_to = optarg;
729
break;
730
case 'd':
731
certdir = optarg;
732
break;
733
case 'c':
734
certfile = optarg;
735
break;
736
case 'k':
737
certkey = optarg;
738
break;
739
case 'D':
740
{
741
long int tmp;
886
742
errno = 0;
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
888
if (errno){
743
tmp = strtol(optarg, NULL, 10);
744
if (errno == ERANGE){
889
745
perror("strtol");
890
746
exit(EXIT_FAILURE);
891
747
}
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;
748
mc.dh_bits = tmp;
749
}
750
break;
751
case 'p':
752
mc.priority = optarg;
753
break;
754
default:
755
exit(EXIT_FAILURE);
756
}
757
}
758
759
certfile = combinepath(certdir, certfile);
760
if (certfile == NULL){
761
perror("combinepath");
762
returncode = EXIT_FAILURE;
763
goto exit;
764
}
765
766
certkey = combinepath(certdir, certkey);
767
if (certkey == NULL){
768
perror("combinepath");
769
returncode = EXIT_FAILURE;
770
goto exit;
982
771
}
983
772
984
773
if_index = (AvahiIfIndex) if_nametoindex(interface);
993
782
char *address = strrchr(connect_to, ':');
994
783
if(address == NULL){
995
784
fprintf(stderr, "No colon in address\n");
996
exitcode = EXIT_FAILURE;
997
goto end;
785
exit(EXIT_FAILURE);
998
786
}
999
787
errno = 0;
1000
788
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1001
789
if(errno){
1002
790
perror("Bad port number");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
791
exit(EXIT_FAILURE);
1005
792
}
1006
793
*address = '\0';
1007
794
address = connect_to;
1008
ret = start_mandos_communication(address, port, if_index, &mc);
795
ret = start_mandos_communication(address, port, if_index);
1009
796
if(ret < 0){
1010
exitcode = EXIT_FAILURE;
797
exit(EXIT_FAILURE);
1011
798
} else {
1012
exitcode = EXIT_SUCCESS;
1013
}
1014
goto end;
1015
}
799
exit(EXIT_SUCCESS);
800
}
801
}
802
803
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
804
if(sd < 0) {
805
perror("socket");
806
returncode = EXIT_FAILURE;
807
goto exit;
808
}
809
strcpy(network.ifr_name, interface);
810
ret = ioctl(sd, SIOCGIFFLAGS, &network);
811
if(ret == -1){
812
813
perror("ioctl SIOCGIFFLAGS");
814
returncode = EXIT_FAILURE;
815
goto exit;
816
}
817
if((network.ifr_flags & IFF_UP) == 0){
818
network.ifr_flags |= IFF_UP;
819
ret = ioctl(sd, SIOCSIFFLAGS, &network);
820
if(ret == -1){
821
perror("ioctl SIOCSIFFLAGS");
822
returncode = EXIT_FAILURE;
823
goto exit;
824
}
825
}
826
close(sd);
1016
827
1017
828
if (not debug){
1018
829
avahi_set_log_function(empty_log);
1019
830
}
1020
831
1021
/* Initialize the pseudo-RNG for Avahi */
832
/* Initialize the psuedo-RNG */
1022
833
srand((unsigned int) time(NULL));
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",
834
835
/* Allocate main loop object */
836
if (!(mc.simple_poll = avahi_simple_poll_new())) {
837
fprintf(stderr, "Failed to create simple poll object.\n");
838
returncode = EXIT_FAILURE;
839
goto exit;
840
}
841
842
/* Do not publish any local records */
843
avahi_server_config_init(&config);
844
config.publish_hinfo = 0;
845
config.publish_addresses = 0;
846
config.publish_workstation = 0;
847
config.publish_domain = 0;
848
849
/* Allocate a new server */
850
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
851
&config, NULL, NULL, &error);
852
853
/* Free the configuration data */
854
avahi_server_config_free(&config);
855
856
/* Check if creating the server object succeeded */
857
if (!mc.server) {
858
fprintf(stderr, "Failed to create server: %s\n",
1054
859
avahi_strerror(error));
1055
exitcode = EXIT_FAILURE;
1056
goto end;
860
returncode = EXIT_FAILURE;
861
goto exit;
1057
862
}
1058
863
1059
/* Create the Avahi service browser */
864
/* Create the service browser */
1060
865
sb = avahi_s_service_browser_new(mc.server, if_index,
1061
866
AVAHI_PROTO_INET6,
1062
867
"_mandos._tcp", NULL, 0,
1063
868
browse_callback, &mc);
1064
if (sb == NULL) {
869
if (!sb) {
1065
870
fprintf(stderr, "Failed to create service browser: %s\n",
1066
871
avahi_strerror(avahi_server_errno(mc.server)));
1067
exitcode = EXIT_FAILURE;
1068
goto end;
872
returncode = EXIT_FAILURE;
873
goto exit;
1069
874
}
1070
875
1071
876
/* Run the main loop */
1072
877
1073
878
if (debug){
1074
fprintf(stderr, "Starting Avahi loop search\n");
879
fprintf(stderr, "Starting avahi loop search\n");
1075
880
}
1076
881
1077
avahi_simple_poll_loop(mc.simple_poll);
1078
1079
end:
1080
882
avahi_simple_poll_loop(simple_poll);
883
884
exit:
885
1081
886
if (debug){
1082
887
fprintf(stderr, "%s exiting\n", argv[0]);
1083
888
}
1084
889
1085
890
/* Cleanup things */
1086
if (sb != NULL)
891
if (sb)
1087
892
avahi_s_service_browser_free(sb);
1088
893
1089
if (mc.server != NULL)
894
if (mc.server)
1090
895
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;
896
897
if (simple_poll)
898
avahi_simple_poll_free(simple_poll);
899
free(certfile);
900
free(certkey);
901
902
return returncode;
1143
903
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0