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- Committer: Teddy Hogeborn
- Date: 2008-09-30 03:19:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20080930031939-t72se4dhr632o9ct
* Makefile: Add HTML rules for manual pages.
(DOCBOOKTOHTML, HTMLPOST): New commands.
(htmldocs): New file list.
(html, install-html): New targets.
(.PHONY, clean): Added "html".
* README (The Plugin System): New section; describe plugin system.
* debian/control (Uploaders): New field.
* mandos-options.xml (servicename): Improve wording.
* plugins.d/mandos-client.xml (SECURITY): Improve wording.
(DOCBOOKTOHTML, HTMLPOST): New commands.
(htmldocs): New file list.
(html, install-html): New targets.
(.PHONY, clean): Added "html".
* README (The Plugin System): New section; describe plugin system.
* debian/control (Uploaders): New field.
* mandos-options.xml (servicename): Improve wording.
* plugins.d/mandos-client.xml (SECURITY): Improve wording.
- 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
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 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() */
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
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_* */
45
79
#include <avahi-core/core.h>
46
80
#include <avahi-core/lookup.h>
47
81
#include <avahi-core/log.h>
49
83
#include <avahi-common/malloc.h>
50
84
#include <avahi-common/error.h>
51
85
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>
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_* */
72
101
73
102
#define BUFFER_SIZE 256
74
#define DH_BITS 1024
75
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";
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
79
111
80
112
bool debug = false;
81
82
const char mandos_protocol_version[] = "1";
83
113
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
117
/* Used for passing in values through the Avahi callback functions */
84
118
typedef struct {
85
119
AvahiSimplePoll *simple_poll;
86
120
AvahiServer *server;
87
121
gnutls_certificate_credentials_t cred;
88
122
unsigned int dh_bits;
123
gnutls_dh_params_t dh_params;
89
124
const char *priority;
125
gpgme_ctx_t ctx;
90
126
} mandos_context;
91
127
92
size_t adjustbuffer(char *buffer, size_t buffer_length,
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,
93
134
size_t buffer_capacity){
94
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
95
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
96
137
if (buffer == NULL){
97
138
return 0;
98
139
}
101
142
return buffer_capacity;
102
143
}
103
144
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;
145
/*
146
* Initialize GPGME.
147
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
149
const char *pubkey, const char *tempdir){
150
int ret;
109
151
gpgme_error_t rc;
110
ssize_t ret;
111
size_t new_packet_capacity = 0;
112
ssize_t new_packet_length = 0;
113
152
gpgme_engine_info_t engine_info;
114
153
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 = 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 = TEMP_FAILURE_RETRY(close(fd));
183
if(ret == -1){
184
perror("close");
185
}
186
gpgme_data_release(pgp_data);
187
return true;
188
}
189
115
190
if (debug){
116
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
191
fprintf(stderr, "Initialize gpgme\n");
117
192
}
118
193
119
194
/* Init GPGME */
122
197
if (rc != GPG_ERR_NO_ERROR){
123
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
124
199
gpgme_strsource(rc), gpgme_strerror(rc));
125
return -1;
200
return false;
126
201
}
127
202
128
/* Set GPGME home directory */
203
/* Set GPGME home directory for the OpenPGP engine only */
129
204
rc = gpgme_get_engine_info (&engine_info);
130
205
if (rc != GPG_ERR_NO_ERROR){
131
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
132
207
gpgme_strsource(rc), gpgme_strerror(rc));
133
return -1;
208
return false;
134
209
}
135
210
while(engine_info != NULL){
136
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
137
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
138
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
139
214
break;
140
215
}
141
216
engine_info = engine_info->next;
142
217
}
143
218
if(engine_info == NULL){
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);
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");
254
}
255
256
/* Create new GPGME data buffer from memory cryptotext */
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
0);
150
259
if (rc != GPG_ERR_NO_ERROR){
151
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
152
261
gpgme_strsource(rc), gpgme_strerror(rc));
158
267
if (rc != GPG_ERR_NO_ERROR){
159
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
160
269
gpgme_strsource(rc), gpgme_strerror(rc));
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);
270
gpgme_data_release(dh_crypto);
271
return -1;
272
}
273
274
/* Decrypt data from the cryptotext data buffer to the plaintext
275
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
175
277
if (rc != GPG_ERR_NO_ERROR){
176
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
177
279
gpgme_strsource(rc), gpgme_strerror(rc));
178
return -1;
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
}
309
goto decrypt_end;
179
310
}
180
311
181
312
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;
209
}
210
}
211
}
212
}
213
214
/* Delete the GPGME FILE pointer cryptotext data buffer */
215
gpgme_data_release(dh_crypto);
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
216
315
217
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
218
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
219
perror("pgpme_data_seek");
318
perror("gpgme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
220
321
}
221
322
222
*new_packet = 0;
323
*plaintext = NULL;
223
324
while(true){
224
new_packet_capacity = adjustbuffer(*new_packet, new_packet_length,
225
new_packet_capacity);
226
if (new_packet_capacity == 0){
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if (plaintext_capacity == 0){
227
329
perror("adjustbuffer");
228
return -1;
229
}
230
new_packet_capacity += BUFFER_SIZE;
330
plaintext_length = -1;
331
goto decrypt_end;
231
332
}
232
333
233
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
234
335
BUFFER_SIZE);
235
336
/* Print the data, if any */
236
337
if (ret == 0){
338
/* EOF */
237
339
break;
238
340
}
239
341
if(ret < 0){
240
342
perror("gpgme_data_read");
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
/* } */
343
plaintext_length = -1;
344
goto decrypt_end;
345
}
346
plaintext_length += ret;
347
}
348
349
if(debug){
350
fprintf(stderr, "Decrypted password is: ");
351
for(ssize_t i = 0; i < plaintext_length; i++){
352
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
353
}
354
fprintf(stderr, "\n");
355
}
356
357
decrypt_end:
358
359
/* Delete the GPGME cryptotext data buffer */
360
gpgme_data_release(dh_crypto);
253
361
254
362
/* Delete the GPGME plaintext data buffer */
255
363
gpgme_data_release(dh_plain);
256
return new_packet_length;
364
return plaintext_length;
257
365
}
258
366
259
367
static const char * safer_gnutls_strerror (int value) {
260
const char *ret = gnutls_strerror (value);
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
261
369
if (ret == NULL)
262
370
ret = "(unknown)";
263
371
return ret;
264
372
}
265
373
374
/* GnuTLS log function callback */
266
375
static void debuggnutls(__attribute__((unused)) int level,
267
376
const char* string){
268
fprintf(stderr, "%s", string);
377
fprintf(stderr, "GnuTLS: %s", string);
269
378
}
270
379
271
static int initgnutls(mandos_context *mc){
272
const char *err;
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
273
383
int ret;
274
384
275
385
if(debug){
276
386
fprintf(stderr, "Initializing GnuTLS\n");
277
387
}
278
279
if ((ret = gnutls_global_init ())
280
!= GNUTLS_E_SUCCESS) {
281
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));
282
393
return -1;
283
394
}
284
395
285
396
if (debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
286
400
gnutls_global_set_log_level(11);
287
401
gnutls_global_set_log_function(debuggnutls);
288
402
}
289
403
290
/* openpgp credentials */
291
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
292
!= GNUTLS_E_SUCCESS) {
293
fprintf (stderr, "memory error: %s\n",
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 */
294
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
295
411
return -1;
296
412
}
297
413
298
414
if(debug){
299
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
300
" and keyfile %s as GnuTLS credentials\n", certfile,
301
certkey);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
302
418
}
303
419
304
420
ret = gnutls_certificate_set_openpgp_key_file
305
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
421
(mc->cred, pubkeyfilename, seckeyfilename,
422
GNUTLS_OPENPGP_FMT_BASE64);
306
423
if (ret != GNUTLS_E_SUCCESS) {
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
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",
312
428
safer_gnutls_strerror(ret));
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){
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){
336
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
337
465
safer_gnutls_strerror(ret));
338
466
}
339
467
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;
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
}
346
478
}
347
479
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
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",
352
484
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
353
486
return -1;
354
487
}
355
488
356
489
/* ignore client certificate if any. */
357
gnutls_certificate_server_set_request (es->session,
490
gnutls_certificate_server_set_request (*session,
358
491
GNUTLS_CERT_IGNORE);
359
492
360
gnutls_dh_set_prime_bits (es->session, DH_BITS);
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
361
494
362
495
return 0;
363
496
}
364
497
498
/* Avahi log function callback */
365
499
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
366
500
__attribute__((unused)) const char *txt){}
367
501
502
/* Called when a Mandos server is found */
368
503
static int start_mandos_communication(const char *ip, uint16_t port,
369
504
AvahiIfIndex if_index,
370
505
mandos_context *mc){
371
506
int ret, tcp_sd;
372
struct sockaddr_in6 to;
373
encrypted_session es;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
374
508
char *buffer = NULL;
375
509
char *decrypted_buffer;
376
510
size_t buffer_length = 0;
379
513
size_t written;
380
514
int retval = 0;
381
515
char interface[IF_NAMESIZE];
516
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
520
return -1;
521
}
382
522
383
523
if(debug){
384
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
385
ip, port);
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
525
"\n", ip, port);
386
526
}
387
527
388
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
390
530
perror("socket");
391
531
return -1;
392
532
}
393
533
394
534
if(debug){
395
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
396
if(debug){
397
perror("if_indextoname");
398
}
536
perror("if_indextoname");
399
537
return -1;
400
538
}
401
402
539
fprintf(stderr, "Binding to interface %s\n", interface);
403
540
}
404
541
405
memset(&to,0,sizeof(to)); /* Spurious warning */
406
to.sin6_family = AF_INET6;
407
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
542
memset(&to, 0, sizeof(to));
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
408
547
if (ret < 0 ){
409
548
perror("inet_pton");
410
549
return -1;
411
}
550
}
412
551
if(ret == 0){
413
552
fprintf(stderr, "Bad address: %s\n", ip);
414
553
return -1;
415
554
}
416
to.sin6_port = htons(port); /* Spurious warning */
555
to.in6.sin6_port = htons(port); /* Spurious warning */
417
556
418
to.sin6_scope_id = (uint32_t)if_index;
557
to.in6.sin6_scope_id = (uint32_t)if_index;
419
558
420
559
if(debug){
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
/* } */
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
565
perror("inet_ntop");
566
} else {
567
if(strcmp(addrstr, ip) != 0){
568
fprintf(stderr, "Canonical address form: %s\n", addrstr);
569
}
570
}
430
571
}
431
572
432
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
573
ret = connect(tcp_sd, &to.in, sizeof(to));
433
574
if (ret < 0){
434
575
perror("connect");
435
576
return -1;
436
577
}
437
438
char *out = mandos_protocol_version;
578
579
const char *out = mandos_protocol_version;
439
580
written = 0;
440
581
while (true){
441
582
size_t out_size = strlen(out);
444
585
if (ret == -1){
445
586
perror("write");
446
587
retval = -1;
447
goto end;
588
goto mandos_end;
448
589
}
449
written += ret;
590
written += (size_t)ret;
450
591
if(written < out_size){
451
592
continue;
452
593
} else {
458
599
}
459
600
}
460
601
}
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);
470
602
471
603
if(debug){
472
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
473
605
}
474
606
475
ret = gnutls_handshake (es.session);
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
608
609
do{
610
ret = gnutls_handshake (session);
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
476
612
477
613
if (ret != GNUTLS_E_SUCCESS){
478
614
if(debug){
479
fprintf(stderr, "\n*** Handshake failed ***\n");
615
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
480
616
gnutls_perror (ret);
481
617
}
482
618
retval = -1;
483
goto exit;
619
goto mandos_end;
484
620
}
485
621
486
//Retrieve OpenPGP packet that contains the wanted password
622
/* Read OpenPGP packet that contains the wanted password */
487
623
488
624
if(debug){
489
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
490
626
ip);
491
627
}
492
628
493
629
while(true){
494
buffer_capacity = adjustbuffer(buffer, buffer_length, buffer_capacity);
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
631
buffer_capacity);
495
632
if (buffer_capacity == 0){
496
633
perror("adjustbuffer");
497
634
retval = -1;
498
goto exit;
635
goto mandos_end;
499
636
}
500
637
501
ret = gnutls_record_recv
502
(es.session, buffer+buffer_length, BUFFER_SIZE);
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
503
640
if (ret == 0){
504
641
break;
505
642
}
509
646
case GNUTLS_E_AGAIN:
510
647
break;
511
648
case GNUTLS_E_REHANDSHAKE:
512
ret = gnutls_handshake (es.session);
649
do{
650
ret = gnutls_handshake (session);
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
513
652
if (ret < 0){
514
fprintf(stderr, "\n*** Handshake failed ***\n");
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
515
654
gnutls_perror (ret);
516
655
retval = -1;
517
goto exit;
656
goto mandos_end;
518
657
}
519
658
break;
520
659
default:
521
660
fprintf(stderr, "Unknown error while reading data from"
522
" encrypted session with mandos server\n");
661
" encrypted session with Mandos server\n");
523
662
retval = -1;
524
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
525
goto exit;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
664
goto mandos_end;
526
665
}
527
666
} else {
528
667
buffer_length += (size_t) ret;
529
668
}
530
669
}
531
670
671
if(debug){
672
fprintf(stderr, "Closing TLS session\n");
673
}
674
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
676
532
677
if (buffer_length > 0){
533
decrypted_buffer_size = pgp_packet_decrypt(buffer,
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
534
679
buffer_length,
535
&decrypted_buffer,
536
certdir);
680
&decrypted_buffer);
537
681
if (decrypted_buffer_size >= 0){
538
682
written = 0;
539
683
while(written < (size_t) decrypted_buffer_size){
554
698
} else {
555
699
retval = -1;
556
700
}
557
}
558
559
//shutdown procedure
560
561
if(debug){
562
fprintf(stderr, "Closing TLS session\n");
563
}
564
701
} else {
702
retval = -1;
703
}
704
705
/* Shutdown procedure */
706
707
mandos_end:
565
708
free(buffer);
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 ();
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
710
if(ret == -1){
711
perror("close");
712
}
713
gnutls_deinit (session);
572
714
return retval;
573
715
}
574
716
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) {
717
static void resolve_callback(AvahiSServiceResolver *r,
718
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
720
AvahiResolverEvent event,
721
const char *name,
722
const char *type,
723
const char *domain,
724
const char *host_name,
725
const AvahiAddress *address,
726
uint16_t port,
727
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
flags,
730
void* userdata) {
588
731
mandos_context *mc = userdata;
589
assert(r); /* Spurious warning */
732
assert(r);
590
733
591
734
/* Called whenever a service has been resolved successfully or
592
735
timed out */
594
737
switch (event) {
595
738
default:
596
739
case AVAHI_RESOLVER_FAILURE:
597
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
598
" type '%s' in domain '%s': %s\n", name, type, domain,
740
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
" of type '%s' in domain '%s': %s\n", name, type, domain,
599
742
avahi_strerror(avahi_server_errno(mc->server)));
600
743
break;
601
744
604
747
char ip[AVAHI_ADDRESS_STR_MAX];
605
748
avahi_address_snprint(ip, sizeof(ip), address);
606
749
if(debug){
607
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
608
" port %d\n", name, host_name, ip, port);
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
609
753
}
610
754
int ret = start_mandos_communication(ip, port, interface, mc);
611
755
if (ret == 0){
612
exit(EXIT_SUCCESS);
756
avahi_simple_poll_quit(mc->simple_poll);
613
757
}
614
758
}
615
759
}
623
767
const char *name,
624
768
const char *type,
625
769
const char *domain,
626
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
770
AVAHI_GCC_UNUSED AvahiLookupResultFlags
771
flags,
627
772
void* userdata) {
628
773
mandos_context *mc = userdata;
629
assert(b); /* Spurious warning */
774
assert(b);
630
775
631
776
/* Called whenever a new services becomes available on the LAN or
632
777
is removed from the LAN */
634
779
switch (event) {
635
780
default:
636
781
case AVAHI_BROWSER_FAILURE:
637
638
fprintf(stderr, "(Browser) %s\n",
782
783
fprintf(stderr, "(Avahi browser) %s\n",
639
784
avahi_strerror(avahi_server_errno(mc->server)));
640
785
avahi_simple_poll_quit(mc->simple_poll);
641
786
return;
642
787
643
788
case AVAHI_BROWSER_NEW:
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,
789
/* We ignore the returned Avahi resolver object. In the callback
790
function we free it. If the Avahi server is terminated before
791
the callback function is called the Avahi server will free the
792
resolver for us. */
793
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
795
protocol, name, type, domain,
651
796
AVAHI_PROTO_INET6, 0,
652
797
resolve_callback, mc)))
653
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
654
avahi_strerror(avahi_server_errno(s)));
798
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
655
800
break;
656
801
657
802
case AVAHI_BROWSER_REMOVE:
658
803
break;
659
804
660
805
case AVAHI_BROWSER_ALL_FOR_NOW:
661
806
case AVAHI_BROWSER_CACHE_EXHAUSTED:
807
if(debug){
808
fprintf(stderr, "No Mandos server found, still searching...\n");
809
}
662
810
break;
663
811
}
664
812
}
665
813
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;
814
int main(int argc, char *argv[]){
689
815
AvahiSServiceBrowser *sb = NULL;
690
816
int error;
691
817
int ret;
692
int returncode = EXIT_SUCCESS;
818
int exitcode = EXIT_SUCCESS;
693
819
const char *interface = "eth0";
694
820
struct ifreq network;
695
821
int sd;
822
uid_t uid;
823
gid_t gid;
696
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
697
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
698
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
699
.dh_bits = 2048, .priority = "SECURE256"};
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
700
835
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;
836
{
837
struct argp_option options[] = {
838
{ .name = "debug", .key = 128,
839
.doc = "Debug mode", .group = 3 },
840
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
843
.group = 1 },
844
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
848
.group = 1 },
849
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
852
.group = 1 },
853
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
856
.group = 2 },
857
{ .name = "dh-bits", .key = 129,
858
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
861
.group = 2 },
862
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
866
{ .name = NULL }
867
};
868
869
error_t parse_opt (int key, char *arg,
870
struct argp_state *state) {
871
/* Get the INPUT argument from `argp_parse', which we know is
872
a pointer to our plugin list pointer. */
873
switch (key) {
874
case 128: /* --debug */
875
debug = true;
876
break;
877
case 'c': /* --connect */
878
connect_to = arg;
879
break;
880
case 'i': /* --interface */
881
interface = arg;
882
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
742
890
errno = 0;
743
tmp = strtol(optarg, NULL, 10);
744
if (errno == ERANGE){
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
if (errno){
745
893
perror("strtol");
746
894
exit(EXIT_FAILURE);
747
895
}
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;
896
break;
897
case 130: /* --priority */
898
mc.priority = arg;
899
break;
900
case ARGP_KEY_ARG:
901
argp_usage (state);
902
case ARGP_KEY_END:
903
break;
904
default:
905
return ARGP_ERR_UNKNOWN;
906
}
907
return 0;
908
}
909
910
struct argp argp = { .options = options, .parser = parse_opt,
911
.args_doc = "",
912
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
if(ret == -1){
933
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
947
if(ret == -1){
948
perror("close");
949
}
950
}
951
952
uid = getuid();
953
gid = getgid();
954
955
ret = setuid(uid);
956
if (ret == -1){
957
perror("setuid");
958
}
959
960
setgid(gid);
961
if (ret == -1){
962
perror("setgid");
963
}
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
771
986
}
772
987
773
988
if_index = (AvahiIfIndex) if_nametoindex(interface);
782
997
char *address = strrchr(connect_to, ':');
783
998
if(address == NULL){
784
999
fprintf(stderr, "No colon in address\n");
785
exit(EXIT_FAILURE);
1000
exitcode = EXIT_FAILURE;
1001
goto end;
786
1002
}
787
1003
errno = 0;
788
1004
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
789
1005
if(errno){
790
1006
perror("Bad port number");
791
exit(EXIT_FAILURE);
1007
exitcode = EXIT_FAILURE;
1008
goto end;
792
1009
}
793
1010
*address = '\0';
794
1011
address = connect_to;
795
ret = start_mandos_communication(address, port, if_index);
1012
ret = start_mandos_communication(address, port, if_index, &mc);
796
1013
if(ret < 0){
797
exit(EXIT_FAILURE);
1014
exitcode = EXIT_FAILURE;
798
1015
} else {
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
exitcode = EXIT_SUCCESS;
1017
}
1018
goto end;
1019
}
827
1020
828
1021
if (not debug){
829
1022
avahi_set_log_function(empty_log);
830
1023
}
831
1024
832
/* Initialize the psuedo-RNG */
1025
/* Initialize the pseudo-RNG for Avahi */
833
1026
srand((unsigned int) time(NULL));
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",
1027
1028
/* Allocate main Avahi loop object */
1029
mc.simple_poll = avahi_simple_poll_new();
1030
if (mc.simple_poll == NULL) {
1031
fprintf(stderr, "Avahi: Failed to create simple poll"
1032
" object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
{
1038
AvahiServerConfig config;
1039
/* Do not publish any local Zeroconf records */
1040
avahi_server_config_init(&config);
1041
config.publish_hinfo = 0;
1042
config.publish_addresses = 0;
1043
config.publish_workstation = 0;
1044
config.publish_domain = 0;
1045
1046
/* Allocate a new server */
1047
mc.server = avahi_server_new(avahi_simple_poll_get
1048
(mc.simple_poll), &config, NULL,
1049
NULL, &error);
1050
1051
/* Free the Avahi configuration data */
1052
avahi_server_config_free(&config);
1053
}
1054
1055
/* Check if creating the Avahi server object succeeded */
1056
if (mc.server == NULL) {
1057
fprintf(stderr, "Failed to create Avahi server: %s\n",
859
1058
avahi_strerror(error));
860
returncode = EXIT_FAILURE;
861
goto exit;
1059
exitcode = EXIT_FAILURE;
1060
goto end;
862
1061
}
863
1062
864
/* Create the service browser */
1063
/* Create the Avahi service browser */
865
1064
sb = avahi_s_service_browser_new(mc.server, if_index,
866
1065
AVAHI_PROTO_INET6,
867
1066
"_mandos._tcp", NULL, 0,
868
1067
browse_callback, &mc);
869
if (!sb) {
1068
if (sb == NULL) {
870
1069
fprintf(stderr, "Failed to create service browser: %s\n",
871
1070
avahi_strerror(avahi_server_errno(mc.server)));
872
returncode = EXIT_FAILURE;
873
goto exit;
1071
exitcode = EXIT_FAILURE;
1072
goto end;
874
1073
}
875
1074
876
1075
/* Run the main loop */
877
1076
878
1077
if (debug){
879
fprintf(stderr, "Starting avahi loop search\n");
1078
fprintf(stderr, "Starting Avahi loop search\n");
880
1079
}
881
1080
882
avahi_simple_poll_loop(simple_poll);
883
884
exit:
885
1081
avahi_simple_poll_loop(mc.simple_poll);
1082
1083
end:
1084
886
1085
if (debug){
887
1086
fprintf(stderr, "%s exiting\n", argv[0]);
888
1087
}
889
1088
890
1089
/* Cleanup things */
891
if (sb)
1090
if (sb != NULL)
892
1091
avahi_s_service_browser_free(sb);
893
1092
894
if (mc.server)
1093
if (mc.server != NULL)
895
1094
avahi_server_free(mc.server);
896
897
if (simple_poll)
898
avahi_simple_poll_free(simple_poll);
899
free(certfile);
900
free(certkey);
901
902
return returncode;
1095
1096
if (mc.simple_poll != NULL)
1097
avahi_simple_poll_free(mc.simple_poll);
1098
1099
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1101
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1115
perror("opendir");
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){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
903
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0