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- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:35:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20090113043519-0yr39snphoegq8l1
* plugin-runner.c: Only space changes.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- 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
1
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Mandos client - get and decrypt data from a Mandos server
3
* Mandos-client - get and decrypt data from a Mandos server
4
4
*
5
5
* This program is partly derived from an example program for an Avahi
6
6
* service browser, downloaded from
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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
32
33
#define _LARGEFILE_SOURCE
33
34
#define _FILE_OFFSET_BITS 64
34
35
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
41
SIOCSIFFLAGS */
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf */
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(),
52
DIR */
53
#include <sys/stat.h> /* open() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
57
#include <fcntl.h> /* open() */
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
*/
60
#include <inttypes.h> /* PRIu16, SCNu16 */
61
#include <assert.h> /* assert() */
62
#include <errno.h> /* perror(), errno */
63
#include <time.h> /* time() */
42
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
65
SIOCSIFFLAGS, if_indextoname(),
66
if_nametoindex(), IF_NAMESIZE */
67
#include <netinet/in.h>
68
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
69
getuid(), getgid(), setuid(),
70
setgid() */
71
#include <arpa/inet.h> /* inet_pton(), htons */
72
#include <iso646.h> /* not, and, or */
73
#include <argp.h> /* struct argp_option, error_t, struct
74
argp_state, struct argp,
75
argp_parse(), ARGP_KEY_ARG,
76
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
44
77
78
/* Avahi */
79
/* All Avahi types, constants and functions
80
Avahi*, avahi_*,
81
AVAHI_* */
45
82
#include <avahi-core/core.h>
46
83
#include <avahi-core/lookup.h>
47
84
#include <avahi-core/log.h>
49
86
#include <avahi-common/malloc.h>
50
87
#include <avahi-common/error.h>
51
88
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>
89
/* GnuTLS */
90
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
91
functions:
92
gnutls_*
93
init_gnutls_session(),
94
GNUTLS_* */
95
#include <gnutls/openpgp.h>
96
/* gnutls_certificate_set_openpgp_key_file(),
97
GNUTLS_OPENPGP_FMT_BASE64 */
98
99
/* GPGME */
100
#include <gpgme.h> /* All GPGME types, constants and
101
functions:
102
gpgme_*
103
GPGME_PROTOCOL_OpenPGP,
104
GPG_ERR_NO_* */
72
105
73
106
#define BUFFER_SIZE 256
74
107
75
static const char *keydir = "/conf/conf.d/mandos";
76
static const char *pubkeyfile = "pubkey.txt";
77
static const char *seckeyfile = "seckey.txt";
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
78
111
79
112
bool debug = false;
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client " VERSION;
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
80
116
81
/* Used for passing in values through all the callback functions */
117
/* Used for passing in values through the Avahi callback functions */
82
118
typedef struct {
83
119
AvahiSimplePoll *simple_poll;
84
120
AvahiServer *server;
85
121
gnutls_certificate_credentials_t cred;
86
122
unsigned int dh_bits;
123
gnutls_dh_params_t dh_params;
87
124
const char *priority;
125
gpgme_ctx_t ctx;
88
126
} mandos_context;
89
127
128
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
131
* "buffer_length" is how much is already used.
132
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
134
size_t buffer_capacity){
135
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if(buffer == NULL){
138
return 0;
139
}
140
buffer_capacity += BUFFER_SIZE;
141
}
142
return buffer_capacity;
143
}
144
90
145
/*
91
* Decrypt OpenPGP data using keyrings in HOMEDIR.
92
* Returns -1 on error
146
* Initialize GPGME.
93
147
*/
94
static ssize_t pgp_packet_decrypt (const char *cryptotext,
95
size_t crypto_size,
96
char **plaintext,
97
const char *homedir){
98
gpgme_data_t dh_crypto, dh_plain;
99
gpgme_ctx_t ctx;
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
100
151
gpgme_error_t rc;
101
ssize_t ret;
102
ssize_t plaintext_capacity = 0;
103
ssize_t plaintext_length = 0;
104
152
gpgme_engine_info_t engine_info;
105
153
106
if (debug){
107
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
154
155
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
157
*/
158
bool import_key(const char *filename){
159
int fd;
160
gpgme_data_t pgp_data;
161
162
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
if(fd == -1){
164
perror("open");
165
return false;
166
}
167
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if(rc != GPG_ERR_NO_ERROR){
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
gpgme_strsource(rc), gpgme_strerror(rc));
172
return false;
173
}
174
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if(rc != GPG_ERR_NO_ERROR){
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
gpgme_strsource(rc), gpgme_strerror(rc));
179
return false;
180
}
181
182
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
190
if(debug){
191
fprintf(stderr, "Initialize gpgme\n");
108
192
}
109
193
110
194
/* Init GPGME */
111
195
gpgme_check_version(NULL);
112
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
113
if (rc != GPG_ERR_NO_ERROR){
197
if(rc != GPG_ERR_NO_ERROR){
114
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
115
199
gpgme_strsource(rc), gpgme_strerror(rc));
116
return -1;
200
return false;
117
201
}
118
202
119
/* Set GPGME home directory for the OpenPGP engine only */
120
rc = gpgme_get_engine_info (&engine_info);
121
if (rc != GPG_ERR_NO_ERROR){
203
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info(&engine_info);
205
if(rc != GPG_ERR_NO_ERROR){
122
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
123
207
gpgme_strsource(rc), gpgme_strerror(rc));
124
return -1;
208
return false;
125
209
}
126
210
while(engine_info != NULL){
127
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
128
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
129
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
130
214
break;
131
215
}
132
216
engine_info = engine_info->next;
133
217
}
134
218
if(engine_info == NULL){
135
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
136
return -1;
219
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
220
return false;
221
}
222
223
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if(rc != GPG_ERR_NO_ERROR){
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
228
return false;
229
}
230
231
if(not import_key(pubkey) or not import_key(seckey)){
232
return false;
233
}
234
235
return true;
236
}
237
238
/*
239
* Decrypt OpenPGP data.
240
* Returns -1 on error
241
*/
242
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
246
gpgme_data_t dh_crypto, dh_plain;
247
gpgme_error_t rc;
248
ssize_t ret;
249
size_t plaintext_capacity = 0;
250
ssize_t plaintext_length = 0;
251
252
if(debug){
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
137
254
}
138
255
139
256
/* Create new GPGME data buffer from memory cryptotext */
140
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
141
258
0);
142
if (rc != GPG_ERR_NO_ERROR){
259
if(rc != GPG_ERR_NO_ERROR){
143
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
144
261
gpgme_strsource(rc), gpgme_strerror(rc));
145
262
return -1;
147
264
148
265
/* Create new empty GPGME data buffer for the plaintext */
149
266
rc = gpgme_data_new(&dh_plain);
150
if (rc != GPG_ERR_NO_ERROR){
267
if(rc != GPG_ERR_NO_ERROR){
151
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
152
269
gpgme_strsource(rc), gpgme_strerror(rc));
153
270
gpgme_data_release(dh_crypto);
154
271
return -1;
155
272
}
156
273
157
/* Create new GPGME "context" */
158
rc = gpgme_new(&ctx);
159
if (rc != GPG_ERR_NO_ERROR){
160
fprintf(stderr, "bad gpgme_new: %s: %s\n",
161
gpgme_strsource(rc), gpgme_strerror(rc));
162
plaintext_length = -1;
163
goto decrypt_end;
164
}
165
166
274
/* Decrypt data from the cryptotext data buffer to the plaintext
167
275
data buffer */
168
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
169
if (rc != GPG_ERR_NO_ERROR){
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if(rc != GPG_ERR_NO_ERROR){
170
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
171
279
gpgme_strsource(rc), gpgme_strerror(rc));
172
280
plaintext_length = -1;
281
if(debug){
282
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if(result == NULL){
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
} else {
287
fprintf(stderr, "Unsupported algorithm: %s\n",
288
result->unsupported_algorithm);
289
fprintf(stderr, "Wrong key usage: %u\n",
290
result->wrong_key_usage);
291
if(result->file_name != NULL){
292
fprintf(stderr, "File name: %s\n", result->file_name);
293
}
294
gpgme_recipient_t recipient;
295
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
306
}
307
}
308
}
173
309
goto decrypt_end;
174
310
}
175
311
177
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
178
314
}
179
315
180
if (debug){
181
gpgme_decrypt_result_t result;
182
result = gpgme_op_decrypt_result(ctx);
183
if (result == NULL){
184
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
185
} else {
186
fprintf(stderr, "Unsupported algorithm: %s\n",
187
result->unsupported_algorithm);
188
fprintf(stderr, "Wrong key usage: %d\n",
189
result->wrong_key_usage);
190
if(result->file_name != NULL){
191
fprintf(stderr, "File name: %s\n", result->file_name);
192
}
193
gpgme_recipient_t recipient;
194
recipient = result->recipients;
195
if(recipient){
196
while(recipient != NULL){
197
fprintf(stderr, "Public key algorithm: %s\n",
198
gpgme_pubkey_algo_name(recipient->pubkey_algo));
199
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
200
fprintf(stderr, "Secret key available: %s\n",
201
recipient->status == GPG_ERR_NO_SECKEY
202
? "No" : "Yes");
203
recipient = recipient->next;
204
}
205
}
206
}
207
}
208
209
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
210
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
211
perror("pgpme_data_seek");
317
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
212
319
plaintext_length = -1;
213
320
goto decrypt_end;
214
321
}
215
322
216
323
*plaintext = NULL;
217
324
while(true){
218
if (plaintext_length + BUFFER_SIZE > plaintext_capacity){
219
*plaintext = realloc(*plaintext,
220
(unsigned int)plaintext_capacity
221
+ BUFFER_SIZE);
222
if (*plaintext == NULL){
223
perror("realloc");
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if(plaintext_capacity == 0){
329
perror("adjustbuffer");
224
330
plaintext_length = -1;
225
331
goto decrypt_end;
226
}
227
plaintext_capacity += BUFFER_SIZE;
228
332
}
229
333
230
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
231
335
BUFFER_SIZE);
232
336
/* Print the data, if any */
233
if (ret == 0){
337
if(ret == 0){
234
338
/* EOF */
235
339
break;
236
340
}
241
345
}
242
346
plaintext_length += ret;
243
347
}
244
348
245
349
if(debug){
246
350
fprintf(stderr, "Decrypted password is: ");
247
for(size_t i = 0; i < plaintext_length; i++){
351
for(ssize_t i = 0; i < plaintext_length; i++){
248
352
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
249
353
}
250
354
fprintf(stderr, "\n");
260
364
return plaintext_length;
261
365
}
262
366
263
static const char * safer_gnutls_strerror (int value) {
264
const char *ret = gnutls_strerror (value);
265
if (ret == NULL)
367
static const char * safer_gnutls_strerror(int value) {
368
const char *ret = gnutls_strerror(value); /* Spurious warning */
369
if(ret == NULL)
266
370
ret = "(unknown)";
267
371
return ret;
268
372
}
269
373
374
/* GnuTLS log function callback */
270
375
static void debuggnutls(__attribute__((unused)) int level,
271
376
const char* string){
272
fprintf(stderr, "%s", string);
377
fprintf(stderr, "GnuTLS: %s", string);
273
378
}
274
379
275
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
276
gnutls_dh_params_t *dh_params){
277
const char *err;
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
278
383
int ret;
279
384
280
385
if(debug){
281
386
fprintf(stderr, "Initializing GnuTLS\n");
282
387
}
283
284
if ((ret = gnutls_global_init ())
285
!= GNUTLS_E_SUCCESS) {
286
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
388
389
ret = gnutls_global_init();
390
if(ret != GNUTLS_E_SUCCESS) {
391
fprintf(stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
287
393
return -1;
288
394
}
289
395
290
if (debug){
396
if(debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
291
400
gnutls_global_set_log_level(11);
292
401
gnutls_global_set_log_function(debuggnutls);
293
402
}
294
403
295
/* openpgp credentials */
296
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
297
!= GNUTLS_E_SUCCESS) {
298
fprintf (stderr, "memory error: %s\n",
299
safer_gnutls_strerror(ret));
404
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if(ret != GNUTLS_E_SUCCESS){
407
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit();
300
411
return -1;
301
412
}
302
413
303
414
if(debug){
304
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
305
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
306
seckeyfile);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
307
418
}
308
419
309
420
ret = gnutls_certificate_set_openpgp_key_file
310
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
311
if (ret != GNUTLS_E_SUCCESS) {
312
fprintf
313
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
314
" '%s')\n",
315
ret, pubkeyfile, seckeyfile);
316
fprintf(stdout, "The Error is: %s\n",
317
safer_gnutls_strerror(ret));
318
return -1;
319
}
320
321
//GnuTLS server initialization
322
if ((ret = gnutls_dh_params_init(dh_params))
323
!= GNUTLS_E_SUCCESS) {
324
fprintf (stderr, "Error in dh parameter initialization: %s\n",
325
safer_gnutls_strerror(ret));
326
return -1;
327
}
328
329
if ((ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits))
330
!= GNUTLS_E_SUCCESS) {
331
fprintf (stderr, "Error in prime generation: %s\n",
332
safer_gnutls_strerror(ret));
333
return -1;
334
}
335
336
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
337
338
// GnuTLS session creation
339
if ((ret = gnutls_init(session, GNUTLS_SERVER))
340
!= GNUTLS_E_SUCCESS){
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
423
if(ret != GNUTLS_E_SUCCESS) {
424
fprintf(stderr,
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
427
fprintf(stderr, "The GnuTLS error is: %s\n",
428
safer_gnutls_strerror(ret));
429
goto globalfail;
430
}
431
432
/* GnuTLS server initialization */
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if(ret != GNUTLS_E_SUCCESS) {
435
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
437
goto globalfail;
438
}
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if(ret != GNUTLS_E_SUCCESS) {
441
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
443
goto globalfail;
444
}
445
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
447
448
return 0;
449
450
globalfail:
451
452
gnutls_certificate_free_credentials(mc->cred);
453
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
455
return -1;
456
}
457
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
460
int ret;
461
/* GnuTLS session creation */
462
ret = gnutls_init(session, GNUTLS_SERVER);
463
if(ret != GNUTLS_E_SUCCESS){
341
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
342
465
safer_gnutls_strerror(ret));
343
466
}
344
467
345
if ((ret = gnutls_priority_set_direct(*session, mc->priority, &err))
346
!= GNUTLS_E_SUCCESS) {
347
fprintf(stderr, "Syntax error at: %s\n", err);
348
fprintf(stderr, "GnuTLS error: %s\n",
349
safer_gnutls_strerror(ret));
350
return -1;
468
{
469
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if(ret != GNUTLS_E_SUCCESS) {
472
fprintf(stderr, "Syntax error at: %s\n", err);
473
fprintf(stderr, "GnuTLS error: %s\n",
474
safer_gnutls_strerror(ret));
475
gnutls_deinit(*session);
476
return -1;
477
}
351
478
}
352
479
353
if ((ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
354
mc->cred))
355
!= GNUTLS_E_SUCCESS) {
356
fprintf(stderr, "Error setting a credentials set: %s\n",
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if(ret != GNUTLS_E_SUCCESS) {
483
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
357
484
safer_gnutls_strerror(ret));
485
gnutls_deinit(*session);
358
486
return -1;
359
487
}
360
488
361
489
/* ignore client certificate if any. */
362
gnutls_certificate_server_set_request (*session,
363
GNUTLS_CERT_IGNORE);
490
gnutls_certificate_server_set_request(*session,
491
GNUTLS_CERT_IGNORE);
364
492
365
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
493
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
366
494
367
495
return 0;
368
496
}
369
497
498
/* Avahi log function callback */
370
499
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
371
500
__attribute__((unused)) const char *txt){}
372
501
502
/* Called when a Mandos server is found */
373
503
static int start_mandos_communication(const char *ip, uint16_t port,
374
504
AvahiIfIndex if_index,
375
505
mandos_context *mc){
376
506
int ret, tcp_sd;
377
struct sockaddr_in6 to;
507
ssize_t sret;
508
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
378
509
char *buffer = NULL;
379
510
char *decrypted_buffer;
380
511
size_t buffer_length = 0;
381
512
size_t buffer_capacity = 0;
382
513
ssize_t decrypted_buffer_size;
383
size_t written = 0;
514
size_t written;
384
515
int retval = 0;
385
516
char interface[IF_NAMESIZE];
386
517
gnutls_session_t session;
387
gnutls_dh_params_t dh_params;
518
519
ret = init_gnutls_session(mc, &session);
520
if(ret != 0){
521
return -1;
522
}
388
523
389
524
if(debug){
390
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
391
ip, port);
525
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
526
"\n", ip, port);
392
527
}
393
528
394
529
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
396
531
perror("socket");
397
532
return -1;
398
533
}
399
534
400
535
if(debug){
401
536
if(if_indextoname((unsigned int)if_index, interface) == NULL){
402
537
perror("if_indextoname");
405
540
fprintf(stderr, "Binding to interface %s\n", interface);
406
541
}
407
542
408
memset(&to,0,sizeof(to)); /* Spurious warning */
409
to.sin6_family = AF_INET6;
410
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
411
if (ret < 0 ){
543
memset(&to, 0, sizeof(to));
544
to.in6.sin6_family = AF_INET6;
545
/* It would be nice to have a way to detect if we were passed an
546
IPv4 address here. Now we assume an IPv6 address. */
547
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
548
if(ret < 0 ){
412
549
perror("inet_pton");
413
550
return -1;
414
551
}
416
553
fprintf(stderr, "Bad address: %s\n", ip);
417
554
return -1;
418
555
}
419
to.sin6_port = htons(port); /* Spurious warning */
556
to.in6.sin6_port = htons(port); /* Spurious warning */
420
557
421
to.sin6_scope_id = (uint32_t)if_index;
558
to.in6.sin6_scope_id = (uint32_t)if_index;
422
559
423
560
if(debug){
424
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
561
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
562
port);
425
563
char addrstr[INET6_ADDRSTRLEN] = "";
426
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
564
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
427
565
sizeof(addrstr)) == NULL){
428
566
perror("inet_ntop");
429
567
} else {
433
571
}
434
572
}
435
573
436
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
437
if (ret < 0){
574
ret = connect(tcp_sd, &to.in, sizeof(to));
575
if(ret < 0){
438
576
perror("connect");
439
577
return -1;
440
578
}
441
579
442
ret = initgnutls (mc, &session, &dh_params);
443
if (ret != 0){
444
retval = -1;
445
return -1;
580
const char *out = mandos_protocol_version;
581
written = 0;
582
while(true){
583
size_t out_size = strlen(out);
584
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
585
out_size - written));
586
if(ret == -1){
587
perror("write");
588
retval = -1;
589
goto mandos_end;
590
}
591
written += (size_t)ret;
592
if(written < out_size){
593
continue;
594
} else {
595
if(out == mandos_protocol_version){
596
written = 0;
597
out = "\r\n";
598
} else {
599
break;
600
}
601
}
446
602
}
447
603
448
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
449
450
604
if(debug){
451
605
fprintf(stderr, "Establishing TLS session with %s\n", ip);
452
606
}
453
607
454
ret = gnutls_handshake (session);
455
456
if (ret != GNUTLS_E_SUCCESS){
608
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
609
610
do{
611
ret = gnutls_handshake(session);
612
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
613
614
if(ret != GNUTLS_E_SUCCESS){
457
615
if(debug){
458
fprintf(stderr, "\n*** Handshake failed ***\n");
459
gnutls_perror (ret);
616
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
617
gnutls_perror(ret);
460
618
}
461
619
retval = -1;
462
goto exit;
620
goto mandos_end;
463
621
}
464
622
465
//Retrieve OpenPGP packet that contains the wanted password
623
/* Read OpenPGP packet that contains the wanted password */
466
624
467
625
if(debug){
468
626
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
469
627
ip);
470
628
}
471
629
472
630
while(true){
473
if (buffer_length + BUFFER_SIZE > buffer_capacity){
474
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
475
if (buffer == NULL){
476
perror("realloc");
477
goto exit;
478
}
479
buffer_capacity += BUFFER_SIZE;
631
buffer_capacity = adjustbuffer(&buffer, buffer_length,
632
buffer_capacity);
633
if(buffer_capacity == 0){
634
perror("adjustbuffer");
635
retval = -1;
636
goto mandos_end;
480
637
}
481
638
482
ret = gnutls_record_recv(session, buffer+buffer_length,
483
BUFFER_SIZE);
484
if (ret == 0){
639
sret = gnutls_record_recv(session, buffer+buffer_length,
640
BUFFER_SIZE);
641
if(sret == 0){
485
642
break;
486
643
}
487
if (ret < 0){
488
switch(ret){
644
if(sret < 0){
645
switch(sret){
489
646
case GNUTLS_E_INTERRUPTED:
490
647
case GNUTLS_E_AGAIN:
491
648
break;
492
649
case GNUTLS_E_REHANDSHAKE:
493
ret = gnutls_handshake (session);
494
if (ret < 0){
495
fprintf(stderr, "\n*** Handshake failed ***\n");
496
gnutls_perror (ret);
650
do{
651
ret = gnutls_handshake(session);
652
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
653
if(ret < 0){
654
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
655
gnutls_perror(ret);
497
656
retval = -1;
498
goto exit;
657
goto mandos_end;
499
658
}
500
659
break;
501
660
default:
502
661
fprintf(stderr, "Unknown error while reading data from"
503
" encrypted session with mandos server\n");
662
" encrypted session with Mandos server\n");
504
663
retval = -1;
505
gnutls_bye (session, GNUTLS_SHUT_RDWR);
506
goto exit;
664
gnutls_bye(session, GNUTLS_SHUT_RDWR);
665
goto mandos_end;
507
666
}
508
667
} else {
509
buffer_length += (size_t) ret;
668
buffer_length += (size_t) sret;
510
669
}
511
670
}
512
671
513
if (buffer_length > 0){
514
decrypted_buffer_size = pgp_packet_decrypt(buffer,
672
if(debug){
673
fprintf(stderr, "Closing TLS session\n");
674
}
675
676
gnutls_bye(session, GNUTLS_SHUT_RDWR);
677
678
if(buffer_length > 0){
679
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
515
680
buffer_length,
516
&decrypted_buffer,
517
keydir);
518
if (decrypted_buffer_size >= 0){
681
&decrypted_buffer);
682
if(decrypted_buffer_size >= 0){
683
written = 0;
519
684
while(written < (size_t) decrypted_buffer_size){
520
ret = (int)fwrite (decrypted_buffer + written, 1,
521
(size_t)decrypted_buffer_size - written,
522
stdout);
685
ret = (int)fwrite(decrypted_buffer + written, 1,
686
(size_t)decrypted_buffer_size - written,
687
stdout);
523
688
if(ret == 0 and ferror(stdout)){
524
689
if(debug){
525
690
fprintf(stderr, "Error writing encrypted data: %s\n",
534
699
} else {
535
700
retval = -1;
536
701
}
537
}
538
539
//shutdown procedure
540
541
if(debug){
542
fprintf(stderr, "Closing TLS session\n");
543
}
544
702
} else {
703
retval = -1;
704
}
705
706
/* Shutdown procedure */
707
708
mandos_end:
545
709
free(buffer);
546
gnutls_bye (session, GNUTLS_SHUT_RDWR);
547
exit:
548
close(tcp_sd);
549
gnutls_deinit (session);
550
gnutls_certificate_free_credentials (mc->cred);
551
gnutls_global_deinit ();
710
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
711
if(ret == -1){
712
perror("close");
713
}
714
gnutls_deinit(session);
552
715
return retval;
553
716
}
554
717
567
730
flags,
568
731
void* userdata) {
569
732
mandos_context *mc = userdata;
570
assert(r); /* Spurious warning */
733
assert(r);
571
734
572
735
/* Called whenever a service has been resolved successfully or
573
736
timed out */
574
737
575
switch (event) {
738
switch(event) {
576
739
default:
577
740
case AVAHI_RESOLVER_FAILURE:
578
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
579
" type '%s' in domain '%s': %s\n", name, type, domain,
741
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
742
" of type '%s' in domain '%s': %s\n", name, type, domain,
580
743
avahi_strerror(avahi_server_errno(mc->server)));
581
744
break;
582
745
585
748
char ip[AVAHI_ADDRESS_STR_MAX];
586
749
avahi_address_snprint(ip, sizeof(ip), address);
587
750
if(debug){
588
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
589
" port %d\n", name, host_name, ip, port);
751
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
752
PRIu16 ") on port %d\n", name, host_name, ip,
753
interface, port);
590
754
}
591
755
int ret = start_mandos_communication(ip, port, interface, mc);
592
if (ret == 0){
593
exit(EXIT_SUCCESS);
756
if(ret == 0){
757
avahi_simple_poll_quit(mc->simple_poll);
594
758
}
595
759
}
596
760
}
608
772
flags,
609
773
void* userdata) {
610
774
mandos_context *mc = userdata;
611
assert(b); /* Spurious warning */
775
assert(b);
612
776
613
777
/* Called whenever a new services becomes available on the LAN or
614
778
is removed from the LAN */
615
779
616
switch (event) {
780
switch(event) {
617
781
default:
618
782
case AVAHI_BROWSER_FAILURE:
619
783
620
fprintf(stderr, "(Browser) %s\n",
784
fprintf(stderr, "(Avahi browser) %s\n",
621
785
avahi_strerror(avahi_server_errno(mc->server)));
622
786
avahi_simple_poll_quit(mc->simple_poll);
623
787
return;
624
788
625
789
case AVAHI_BROWSER_NEW:
626
/* We ignore the returned resolver object. In the callback
627
function we free it. If the server is terminated before
628
the callback function is called the server will free
629
the resolver for us. */
790
/* We ignore the returned Avahi resolver object. In the callback
791
function we free it. If the Avahi server is terminated before
792
the callback function is called the Avahi server will free the
793
resolver for us. */
630
794
631
if (!(avahi_s_service_resolver_new(mc->server, interface,
795
if(!(avahi_s_service_resolver_new(mc->server, interface,
632
796
protocol, name, type, domain,
633
797
AVAHI_PROTO_INET6, 0,
634
798
resolve_callback, mc)))
635
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
636
avahi_strerror(avahi_server_errno(mc->server)));
799
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
800
name, avahi_strerror(avahi_server_errno(mc->server)));
637
801
break;
638
802
639
803
case AVAHI_BROWSER_REMOVE:
641
805
642
806
case AVAHI_BROWSER_ALL_FOR_NOW:
643
807
case AVAHI_BROWSER_CACHE_EXHAUSTED:
808
if(debug){
809
fprintf(stderr, "No Mandos server found, still searching...\n");
810
}
644
811
break;
645
812
}
646
813
}
647
814
648
/* Combines file name and path and returns the malloced new
649
string. some sane checks could/should be added */
650
static const char *combinepath(const char *first, const char *second){
651
size_t f_len = strlen(first);
652
size_t s_len = strlen(second);
653
char *tmp = malloc(f_len + s_len + 2);
654
if (tmp == NULL){
655
return NULL;
656
}
657
if(f_len > 0){
658
memcpy(tmp, first, f_len); /* Spurious warning */
659
}
660
tmp[f_len] = '/';
661
if(s_len > 0){
662
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
663
}
664
tmp[f_len + 1 + s_len] = '\0';
665
return tmp;
666
}
667
668
669
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
670
AvahiServerConfig config;
815
int main(int argc, char *argv[]){
671
816
AvahiSServiceBrowser *sb = NULL;
672
817
int error;
673
818
int ret;
674
int debug_int;
675
int returncode = EXIT_SUCCESS;
819
int exitcode = EXIT_SUCCESS;
676
820
const char *interface = "eth0";
677
821
struct ifreq network;
678
822
int sd;
823
uid_t uid;
824
gid_t gid;
679
825
char *connect_to = NULL;
826
char tempdir[] = "/tmp/mandosXXXXXX";
680
827
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
828
const char *seckey = PATHDIR "/" SECKEY;
829
const char *pubkey = PATHDIR "/" PUBKEY;
830
681
831
mandos_context mc = { .simple_poll = NULL, .server = NULL,
682
.dh_bits = 1024, .priority = "SECURE256"};
683
684
debug_int = debug ? 1 : 0;
685
while (true){
686
struct option long_options[] = {
687
{"debug", no_argument, &debug_int, 1},
688
{"connect", required_argument, NULL, 'c'},
689
{"interface", required_argument, NULL, 'i'},
690
{"keydir", required_argument, NULL, 'd'},
691
{"seckey", required_argument, NULL, 's'},
692
{"pubkey", required_argument, NULL, 'p'},
693
{"dh-bits", required_argument, NULL, 'D'},
694
{"priority", required_argument, NULL, 'P'},
695
{0, 0, 0, 0} };
696
697
int option_index = 0;
698
ret = getopt_long (argc, argv, "i:", long_options,
699
&option_index);
700
701
if (ret == -1){
702
break;
703
}
704
705
switch(ret){
706
case 0:
707
break;
708
case 'i':
709
interface = optarg;
710
break;
711
case 'c':
712
connect_to = optarg;
713
break;
714
case 'd':
715
keydir = optarg;
716
break;
717
case 'p':
718
pubkeyfile = optarg;
719
break;
720
case 's':
721
seckeyfile = optarg;
722
break;
723
case 'D':
724
errno = 0;
725
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
726
if (errno){
727
perror("strtol");
728
exit(EXIT_FAILURE);
729
}
730
break;
731
case 'P':
732
mc.priority = optarg;
733
break;
734
case '?':
735
default:
736
exit(EXIT_FAILURE);
737
}
738
}
739
debug = debug_int ? true : false;
740
741
pubkeyfile = combinepath(keydir, pubkeyfile);
742
if (pubkeyfile == NULL){
743
perror("combinepath");
744
returncode = EXIT_FAILURE;
745
goto exit;
746
}
747
748
seckeyfile = combinepath(keydir, seckeyfile);
749
if (seckeyfile == NULL){
750
perror("combinepath");
751
goto exit;
832
.dh_bits = 1024, .priority = "SECURE256"
833
":!CTYPE-X.509:+CTYPE-OPENPGP" };
834
bool gnutls_initalized = false;
835
bool gpgme_initalized = false;
836
837
{
838
struct argp_option options[] = {
839
{ .name = "debug", .key = 128,
840
.doc = "Debug mode", .group = 3 },
841
{ .name = "connect", .key = 'c',
842
.arg = "ADDRESS:PORT",
843
.doc = "Connect directly to a specific Mandos server",
844
.group = 1 },
845
{ .name = "interface", .key = 'i',
846
.arg = "NAME",
847
.doc = "Interface that will be used to search for Mandos"
848
" servers",
849
.group = 1 },
850
{ .name = "seckey", .key = 's',
851
.arg = "FILE",
852
.doc = "OpenPGP secret key file base name",
853
.group = 1 },
854
{ .name = "pubkey", .key = 'p',
855
.arg = "FILE",
856
.doc = "OpenPGP public key file base name",
857
.group = 2 },
858
{ .name = "dh-bits", .key = 129,
859
.arg = "BITS",
860
.doc = "Bit length of the prime number used in the"
861
" Diffie-Hellman key exchange",
862
.group = 2 },
863
{ .name = "priority", .key = 130,
864
.arg = "STRING",
865
.doc = "GnuTLS priority string for the TLS handshake",
866
.group = 1 },
867
{ .name = NULL }
868
};
869
870
error_t parse_opt(int key, char *arg,
871
struct argp_state *state) {
872
switch(key) {
873
case 128: /* --debug */
874
debug = true;
875
break;
876
case 'c': /* --connect */
877
connect_to = arg;
878
break;
879
case 'i': /* --interface */
880
interface = arg;
881
break;
882
case 's': /* --seckey */
883
seckey = arg;
884
break;
885
case 'p': /* --pubkey */
886
pubkey = arg;
887
break;
888
case 129: /* --dh-bits */
889
ret = sscanf(arg, "%u", &mc.dh_bits);
890
if(ret != 1){
891
fprintf(stderr, "Bad number of DH bits\n");
892
exit(EXIT_FAILURE);
893
}
894
break;
895
case 130: /* --priority */
896
mc.priority = arg;
897
break;
898
case ARGP_KEY_ARG:
899
argp_usage(state);
900
case ARGP_KEY_END:
901
break;
902
default:
903
return ARGP_ERR_UNKNOWN;
904
}
905
return 0;
906
}
907
908
struct argp argp = { .options = options, .parser = parse_opt,
909
.args_doc = "",
910
.doc = "Mandos client -- Get and decrypt"
911
" passwords from a Mandos server" };
912
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
913
if(ret == ARGP_ERR_UNKNOWN){
914
fprintf(stderr, "Unknown error while parsing arguments\n");
915
exitcode = EXIT_FAILURE;
916
goto end;
917
}
918
}
919
920
/* If the interface is down, bring it up */
921
{
922
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
923
if(sd < 0) {
924
perror("socket");
925
exitcode = EXIT_FAILURE;
926
goto end;
927
}
928
strcpy(network.ifr_name, interface);
929
ret = ioctl(sd, SIOCGIFFLAGS, &network);
930
if(ret == -1){
931
perror("ioctl SIOCGIFFLAGS");
932
exitcode = EXIT_FAILURE;
933
goto end;
934
}
935
if((network.ifr_flags & IFF_UP) == 0){
936
network.ifr_flags |= IFF_UP;
937
ret = ioctl(sd, SIOCSIFFLAGS, &network);
938
if(ret == -1){
939
perror("ioctl SIOCSIFFLAGS");
940
exitcode = EXIT_FAILURE;
941
goto end;
942
}
943
}
944
ret = (int)TEMP_FAILURE_RETRY(close(sd));
945
if(ret == -1){
946
perror("close");
947
}
948
}
949
950
uid = getuid();
951
gid = getgid();
952
953
ret = setuid(uid);
954
if(ret == -1){
955
perror("setuid");
956
}
957
958
setgid(gid);
959
if(ret == -1){
960
perror("setgid");
961
}
962
963
ret = init_gnutls_global(&mc, pubkey, seckey);
964
if(ret == -1){
965
fprintf(stderr, "init_gnutls_global failed\n");
966
exitcode = EXIT_FAILURE;
967
goto end;
968
} else {
969
gnutls_initalized = true;
970
}
971
972
if(mkdtemp(tempdir) == NULL){
973
perror("mkdtemp");
974
tempdir[0] = '\0';
975
goto end;
976
}
977
978
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
979
fprintf(stderr, "gpgme_initalized failed\n");
980
exitcode = EXIT_FAILURE;
981
goto end;
982
} else {
983
gpgme_initalized = true;
752
984
}
753
985
754
986
if_index = (AvahiIfIndex) if_nametoindex(interface);
763
995
char *address = strrchr(connect_to, ':');
764
996
if(address == NULL){
765
997
fprintf(stderr, "No colon in address\n");
766
exit(EXIT_FAILURE);
998
exitcode = EXIT_FAILURE;
999
goto end;
767
1000
}
768
errno = 0;
769
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
770
if(errno){
771
perror("Bad port number");
772
exit(EXIT_FAILURE);
1001
uint16_t port;
1002
ret = sscanf(address+1, "%" SCNu16, &port);
1003
if(ret != 1){
1004
fprintf(stderr, "Bad port number\n");
1005
exitcode = EXIT_FAILURE;
1006
goto end;
773
1007
}
774
1008
*address = '\0';
775
1009
address = connect_to;
776
1010
ret = start_mandos_communication(address, port, if_index, &mc);
777
1011
if(ret < 0){
778
exit(EXIT_FAILURE);
1012
exitcode = EXIT_FAILURE;
779
1013
} else {
780
exit(EXIT_SUCCESS);
781
}
782
}
783
784
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
785
if(sd < 0) {
786
perror("socket");
787
returncode = EXIT_FAILURE;
788
goto exit;
789
}
790
strcpy(network.ifr_name, interface); /* Spurious warning */
791
ret = ioctl(sd, SIOCGIFFLAGS, &network);
792
if(ret == -1){
793
794
perror("ioctl SIOCGIFFLAGS");
795
returncode = EXIT_FAILURE;
796
goto exit;
797
}
798
if((network.ifr_flags & IFF_UP) == 0){
799
network.ifr_flags |= IFF_UP;
800
ret = ioctl(sd, SIOCSIFFLAGS, &network);
801
if(ret == -1){
802
perror("ioctl SIOCSIFFLAGS");
803
returncode = EXIT_FAILURE;
804
goto exit;
805
}
806
}
807
close(sd);
808
809
if (not debug){
1014
exitcode = EXIT_SUCCESS;
1015
}
1016
goto end;
1017
}
1018
1019
if(not debug){
810
1020
avahi_set_log_function(empty_log);
811
1021
}
812
1022
813
/* Initialize the psuedo-RNG */
1023
/* Initialize the pseudo-RNG for Avahi */
814
1024
srand((unsigned int) time(NULL));
815
816
/* Allocate main loop object */
817
if (!(mc.simple_poll = avahi_simple_poll_new())) {
818
fprintf(stderr, "Failed to create simple poll object.\n");
819
returncode = EXIT_FAILURE;
820
goto exit;
821
}
822
823
/* Do not publish any local records */
824
avahi_server_config_init(&config);
825
config.publish_hinfo = 0;
826
config.publish_addresses = 0;
827
config.publish_workstation = 0;
828
config.publish_domain = 0;
829
830
/* Allocate a new server */
831
mc.server=avahi_server_new(avahi_simple_poll_get(mc.simple_poll),
832
&config, NULL, NULL, &error);
833
834
/* Free the configuration data */
835
avahi_server_config_free(&config);
836
837
/* Check if creating the server object succeeded */
838
if (!mc.server) {
839
fprintf(stderr, "Failed to create server: %s\n",
1025
1026
/* Allocate main Avahi loop object */
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if(mc.simple_poll == NULL) {
1029
fprintf(stderr, "Avahi: Failed to create simple poll"
1030
" object.\n");
1031
exitcode = EXIT_FAILURE;
1032
goto end;
1033
}
1034
1035
{
1036
AvahiServerConfig config;
1037
/* Do not publish any local Zeroconf records */
1038
avahi_server_config_init(&config);
1039
config.publish_hinfo = 0;
1040
config.publish_addresses = 0;
1041
config.publish_workstation = 0;
1042
config.publish_domain = 0;
1043
1044
/* Allocate a new server */
1045
mc.server = avahi_server_new(avahi_simple_poll_get
1046
(mc.simple_poll), &config, NULL,
1047
NULL, &error);
1048
1049
/* Free the Avahi configuration data */
1050
avahi_server_config_free(&config);
1051
}
1052
1053
/* Check if creating the Avahi server object succeeded */
1054
if(mc.server == NULL) {
1055
fprintf(stderr, "Failed to create Avahi server: %s\n",
840
1056
avahi_strerror(error));
841
returncode = EXIT_FAILURE;
842
goto exit;
1057
exitcode = EXIT_FAILURE;
1058
goto end;
843
1059
}
844
1060
845
/* Create the service browser */
1061
/* Create the Avahi service browser */
846
1062
sb = avahi_s_service_browser_new(mc.server, if_index,
847
1063
AVAHI_PROTO_INET6,
848
1064
"_mandos._tcp", NULL, 0,
849
1065
browse_callback, &mc);
850
if (!sb) {
1066
if(sb == NULL) {
851
1067
fprintf(stderr, "Failed to create service browser: %s\n",
852
1068
avahi_strerror(avahi_server_errno(mc.server)));
853
returncode = EXIT_FAILURE;
854
goto exit;
1069
exitcode = EXIT_FAILURE;
1070
goto end;
855
1071
}
856
1072
857
1073
/* Run the main loop */
858
859
if (debug){
860
fprintf(stderr, "Starting avahi loop search\n");
1074
1075
if(debug){
1076
fprintf(stderr, "Starting Avahi loop search\n");
861
1077
}
862
1078
863
1079
avahi_simple_poll_loop(mc.simple_poll);
864
1080
865
exit:
866
867
if (debug){
1081
end:
1082
1083
if(debug){
868
1084
fprintf(stderr, "%s exiting\n", argv[0]);
869
1085
}
870
1086
871
1087
/* Cleanup things */
872
if (sb)
1088
if(sb != NULL)
873
1089
avahi_s_service_browser_free(sb);
874
1090
875
if (mc.server)
1091
if(mc.server != NULL)
876
1092
avahi_server_free(mc.server);
877
878
if (mc.simple_poll)
1093
1094
if(mc.simple_poll != NULL)
879
1095
avahi_simple_poll_free(mc.simple_poll);
880
free(pubkeyfile);
881
free(seckeyfile);
882
883
return returncode;
1096
1097
if(gnutls_initalized){
1098
gnutls_certificate_free_credentials(mc.cred);
1099
gnutls_global_deinit();
1100
gnutls_dh_params_deinit(mc.dh_params);
1101
}
1102
1103
if(gpgme_initalized){
1104
gpgme_release(mc.ctx);
1105
}
1106
1107
/* Removes the temp directory used by GPGME */
1108
if(tempdir[0] != '\0'){
1109
DIR *d;
1110
struct dirent *direntry;
1111
d = opendir(tempdir);
1112
if(d == NULL){
1113
if(errno != ENOENT){
1114
perror("opendir");
1115
}
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if(direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1 and errno != ENOENT){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
884
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0