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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
25
26
* along with this program. If not, see
26
27
* <http://www.gnu.org/licenses/>.
27
28
*
28
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
29
* <https://www.fukt.bsnet.se/~teddy/>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#define _LARGEFILE_SOURCE
34
34
#define _FILE_OFFSET_BITS 64
35
35
36
#include <stdio.h>
37
#include <assert.h>
38
#include <stdlib.h>
39
#include <time.h>
40
#include <net/if.h> /* if_nametoindex */
41
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() */
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
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 */
77
78
/* Avahi */
79
/* All Avahi types, constants and functions
80
Avahi*, avahi_*,
81
AVAHI_* */
42
82
#include <avahi-core/core.h>
43
83
#include <avahi-core/lookup.h>
44
84
#include <avahi-core/log.h>
46
86
#include <avahi-common/malloc.h>
47
87
#include <avahi-common/error.h>
48
88
49
//mandos client part
50
#include <sys/types.h> /* socket(), inet_pton() */
51
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
52
struct in6_addr, inet_pton() */
53
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
54
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
55
56
#include <unistd.h> /* close() */
57
#include <netinet/in.h>
58
#include <stdbool.h> /* true */
59
#include <string.h> /* memset */
60
#include <arpa/inet.h> /* inet_pton() */
61
#include <iso646.h> /* not */
62
63
// gpgme
64
#include <errno.h> /* perror() */
65
#include <gpgme.h>
66
67
// getopt long
68
#include <getopt.h>
69
70
#ifndef CERT_ROOT
71
#define CERT_ROOT "/conf/conf.d/cryptkeyreq/"
72
#endif
73
#define CERTFILE CERT_ROOT "openpgp-client.txt"
74
#define KEYFILE CERT_ROOT "openpgp-client-key.txt"
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_* */
105
75
106
#define BUFFER_SIZE 256
76
#define DH_BITS 1024
107
108
#define PATHDIR "/conf/conf.d/mandos"
109
#define SECKEY "seckey.txt"
110
#define PUBKEY "pubkey.txt"
77
111
78
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>";
79
116
117
/* Used for passing in values through the Avahi callback functions */
80
118
typedef struct {
81
gnutls_session_t session;
119
AvahiSimplePoll *simple_poll;
120
AvahiServer *server;
82
121
gnutls_certificate_credentials_t cred;
122
unsigned int dh_bits;
83
123
gnutls_dh_params_t dh_params;
84
} encrypted_session;
85
86
87
ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet, const char *homedir){
89
gpgme_data_t dh_crypto, dh_plain;
124
const char *priority;
90
125
gpgme_ctx_t ctx;
126
} mandos_context;
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
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;
91
151
gpgme_error_t rc;
92
ssize_t ret;
93
ssize_t new_packet_capacity = 0;
94
ssize_t new_packet_length = 0;
95
152
gpgme_engine_info_t engine_info;
96
97
if (debug){
98
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
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 = (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");
99
192
}
100
193
101
194
/* Init GPGME */
102
195
gpgme_check_version(NULL);
103
gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if(rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
104
202
105
/* Set GPGME home directory */
106
rc = gpgme_get_engine_info (&engine_info);
107
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){
108
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
109
207
gpgme_strsource(rc), gpgme_strerror(rc));
110
return -1;
208
return false;
111
209
}
112
210
while(engine_info != NULL){
113
211
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
114
212
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
115
engine_info->file_name, homedir);
213
engine_info->file_name, tempdir);
116
214
break;
117
215
}
118
216
engine_info = engine_info->next;
119
217
}
120
218
if(engine_info == NULL){
121
fprintf(stderr, "Could not set home dir to %s\n", homedir);
122
return -1;
123
}
124
125
/* Create new GPGME data buffer from packet buffer */
126
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
127
if (rc != GPG_ERR_NO_ERROR){
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);
259
if(rc != GPG_ERR_NO_ERROR){
128
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
129
261
gpgme_strsource(rc), gpgme_strerror(rc));
130
262
return -1;
132
264
133
265
/* Create new empty GPGME data buffer for the plaintext */
134
266
rc = gpgme_data_new(&dh_plain);
135
if (rc != GPG_ERR_NO_ERROR){
267
if(rc != GPG_ERR_NO_ERROR){
136
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
137
269
gpgme_strsource(rc), gpgme_strerror(rc));
138
return -1;
139
}
140
141
/* Create new GPGME "context" */
142
rc = gpgme_new(&ctx);
143
if (rc != GPG_ERR_NO_ERROR){
144
fprintf(stderr, "bad gpgme_new: %s: %s\n",
145
gpgme_strsource(rc), gpgme_strerror(rc));
146
return -1;
147
}
148
149
/* Decrypt data from the FILE pointer to the plaintext data
150
buffer */
151
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
152
if (rc != GPG_ERR_NO_ERROR){
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);
277
if(rc != GPG_ERR_NO_ERROR){
153
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
154
279
gpgme_strsource(rc), gpgme_strerror(rc));
155
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;
156
310
}
157
311
158
312
if(debug){
159
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
160
}
161
162
if (debug){
163
gpgme_decrypt_result_t result;
164
result = gpgme_op_decrypt_result(ctx);
165
if (result == NULL){
166
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
167
} else {
168
fprintf(stderr, "Unsupported algorithm: %s\n",
169
result->unsupported_algorithm);
170
fprintf(stderr, "Wrong key usage: %d\n",
171
result->wrong_key_usage);
172
if(result->file_name != NULL){
173
fprintf(stderr, "File name: %s\n", result->file_name);
174
}
175
gpgme_recipient_t recipient;
176
recipient = result->recipients;
177
if(recipient){
178
while(recipient != NULL){
179
fprintf(stderr, "Public key algorithm: %s\n",
180
gpgme_pubkey_algo_name(recipient->pubkey_algo));
181
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
182
fprintf(stderr, "Secret key available: %s\n",
183
recipient->status == GPG_ERR_NO_SECKEY
184
? "No" : "Yes");
185
recipient = recipient->next;
186
}
187
}
188
}
189
}
190
191
/* Delete the GPGME FILE pointer cryptotext data buffer */
192
gpgme_data_release(dh_crypto);
313
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
314
}
193
315
194
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
195
gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET);
196
197
*new_packet = 0;
317
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
perror("gpgme_data_seek");
319
plaintext_length = -1;
320
goto decrypt_end;
321
}
322
323
*plaintext = NULL;
198
324
while(true){
199
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
200
*new_packet = realloc(*new_packet,
201
(unsigned int)new_packet_capacity
202
+ BUFFER_SIZE);
203
if (*new_packet == NULL){
204
perror("realloc");
205
return -1;
206
}
207
new_packet_capacity += BUFFER_SIZE;
325
plaintext_capacity = adjustbuffer(plaintext,
326
(size_t)plaintext_length,
327
plaintext_capacity);
328
if(plaintext_capacity == 0){
329
perror("adjustbuffer");
330
plaintext_length = -1;
331
goto decrypt_end;
208
332
}
209
333
210
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
211
335
BUFFER_SIZE);
212
336
/* Print the data, if any */
213
if (ret == 0){
337
if(ret == 0){
338
/* EOF */
214
339
break;
215
340
}
216
341
if(ret < 0){
217
342
perror("gpgme_data_read");
218
return -1;
219
}
220
new_packet_length += ret;
221
}
222
223
/* FIXME: check characters before printing to screen so to not print
224
terminal control characters */
225
/* if(debug){ */
226
/* fprintf(stderr, "decrypted password is: "); */
227
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
228
/* fprintf(stderr, "\n"); */
229
/* } */
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);
230
361
231
362
/* Delete the GPGME plaintext data buffer */
232
363
gpgme_data_release(dh_plain);
233
return new_packet_length;
364
return plaintext_length;
234
365
}
235
366
236
static const char * safer_gnutls_strerror (int value) {
237
const char *ret = gnutls_strerror (value);
238
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)
239
370
ret = "(unknown)";
240
371
return ret;
241
372
}
242
373
243
void debuggnutls(__attribute__((unused)) int level,
244
const char* string){
245
fprintf(stderr, "%s", string);
374
/* GnuTLS log function callback */
375
static void debuggnutls(__attribute__((unused)) int level,
376
const char* string){
377
fprintf(stderr, "GnuTLS: %s", string);
246
378
}
247
379
248
int initgnutls(encrypted_session *es){
249
const char *err;
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
382
const char *seckeyfilename){
250
383
int ret;
251
384
252
385
if(debug){
253
386
fprintf(stderr, "Initializing GnuTLS\n");
254
387
}
255
388
256
if ((ret = gnutls_global_init ())
257
!= GNUTLS_E_SUCCESS) {
258
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
389
ret = gnutls_global_init();
390
if(ret != GNUTLS_E_SUCCESS) {
391
fprintf(stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
259
393
return -1;
260
394
}
261
262
if (debug){
395
396
if(debug){
397
/* "Use a log level over 10 to enable all debugging options."
398
* - GnuTLS manual
399
*/
263
400
gnutls_global_set_log_level(11);
264
401
gnutls_global_set_log_function(debuggnutls);
265
402
}
266
403
267
/* openpgp credentials */
268
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
269
!= GNUTLS_E_SUCCESS) {
270
fprintf (stderr, "memory error: %s\n",
271
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();
272
411
return -1;
273
412
}
274
413
275
414
if(debug){
276
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
277
" and keyfile %s as GnuTLS credentials\n", CERTFILE,
278
KEYFILE);
415
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
416
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
417
seckeyfilename);
279
418
}
280
419
281
420
ret = gnutls_certificate_set_openpgp_key_file
282
(es->cred, CERTFILE, KEYFILE, GNUTLS_OPENPGP_FMT_BASE64);
283
if (ret != GNUTLS_E_SUCCESS) {
284
fprintf
285
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
286
" '%s')\n",
287
ret, CERTFILE, KEYFILE);
288
fprintf(stdout, "The Error is: %s\n",
289
safer_gnutls_strerror(ret));
290
return -1;
291
}
292
293
//GnuTLS server initialization
294
if ((ret = gnutls_dh_params_init (&es->dh_params))
295
!= GNUTLS_E_SUCCESS) {
296
fprintf (stderr, "Error in dh parameter initialization: %s\n",
297
safer_gnutls_strerror(ret));
298
return -1;
299
}
300
301
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "Error in prime generation: %s\n",
304
safer_gnutls_strerror(ret));
305
return -1;
306
}
307
308
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
309
310
// GnuTLS session creation
311
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
312
!= 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){
313
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
314
465
safer_gnutls_strerror(ret));
315
466
}
316
467
317
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
318
!= GNUTLS_E_SUCCESS) {
319
fprintf(stderr, "Syntax error at: %s\n", err);
320
fprintf(stderr, "GnuTLS error: %s\n",
321
safer_gnutls_strerror(ret));
322
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
}
323
478
}
324
479
325
if ((ret = gnutls_credentials_set
326
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
327
!= GNUTLS_E_SUCCESS) {
328
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",
329
484
safer_gnutls_strerror(ret));
485
gnutls_deinit(*session);
330
486
return -1;
331
487
}
332
488
333
489
/* ignore client certificate if any. */
334
gnutls_certificate_server_set_request (es->session,
335
GNUTLS_CERT_IGNORE);
490
gnutls_certificate_server_set_request(*session,
491
GNUTLS_CERT_IGNORE);
336
492
337
gnutls_dh_set_prime_bits (es->session, DH_BITS);
493
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
338
494
339
495
return 0;
340
496
}
341
497
342
void empty_log(__attribute__((unused)) AvahiLogLevel level,
343
__attribute__((unused)) const char *txt){}
498
/* Avahi log function callback */
499
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
500
__attribute__((unused)) const char *txt){}
344
501
345
int start_mandos_communication(const char *ip, uint16_t port,
346
AvahiIfIndex if_index){
502
/* Called when a Mandos server is found */
503
static int start_mandos_communication(const char *ip, uint16_t port,
504
AvahiIfIndex if_index,
505
mandos_context *mc){
347
506
int ret, tcp_sd;
348
struct sockaddr_in6 to;
349
encrypted_session es;
507
ssize_t sret;
508
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
350
509
char *buffer = NULL;
351
510
char *decrypted_buffer;
352
511
size_t buffer_length = 0;
353
512
size_t buffer_capacity = 0;
354
513
ssize_t decrypted_buffer_size;
355
size_t written = 0;
514
size_t written;
356
515
int retval = 0;
357
516
char interface[IF_NAMESIZE];
517
gnutls_session_t session;
518
519
ret = init_gnutls_session(mc, &session);
520
if(ret != 0){
521
return -1;
522
}
358
523
359
524
if(debug){
360
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
361
ip, port);
525
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
526
"\n", ip, port);
362
527
}
363
528
364
529
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
367
532
return -1;
368
533
}
369
534
370
if(if_indextoname((unsigned int)if_index, interface) == NULL){
371
if(debug){
535
if(debug){
536
if(if_indextoname((unsigned int)if_index, interface) == NULL){
372
537
perror("if_indextoname");
538
return -1;
373
539
}
374
return -1;
375
}
376
377
if(debug){
378
540
fprintf(stderr, "Binding to interface %s\n", interface);
379
541
}
380
542
381
memset(&to,0,sizeof(to)); /* Spurious warning */
382
to.sin6_family = AF_INET6;
383
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
384
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 ){
385
549
perror("inet_pton");
386
550
return -1;
387
}
551
}
388
552
if(ret == 0){
389
553
fprintf(stderr, "Bad address: %s\n", ip);
390
554
return -1;
391
555
}
392
to.sin6_port = htons(port); /* Spurious warning */
556
to.in6.sin6_port = htons(port); /* Spurious warning */
393
557
394
to.sin6_scope_id = (uint32_t)if_index;
558
to.in6.sin6_scope_id = (uint32_t)if_index;
395
559
396
560
if(debug){
397
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
398
/* char addrstr[INET6_ADDRSTRLEN]; */
399
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
400
/* sizeof(addrstr)) == NULL){ */
401
/* perror("inet_ntop"); */
402
/* } else { */
403
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
404
/* addrstr, ntohs(to.sin6_port)); */
405
/* } */
561
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
562
port);
563
char addrstr[INET6_ADDRSTRLEN] = "";
564
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
565
sizeof(addrstr)) == NULL){
566
perror("inet_ntop");
567
} else {
568
if(strcmp(addrstr, ip) != 0){
569
fprintf(stderr, "Canonical address form: %s\n", addrstr);
570
}
571
}
406
572
}
407
573
408
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
409
if (ret < 0){
574
ret = connect(tcp_sd, &to.in, sizeof(to));
575
if(ret < 0){
410
576
perror("connect");
411
577
return -1;
412
578
}
413
579
414
ret = initgnutls (&es);
415
if (ret != 0){
416
retval = -1;
417
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
}
418
602
}
419
603
420
gnutls_transport_set_ptr (es.session,
421
(gnutls_transport_ptr_t) tcp_sd);
422
423
604
if(debug){
424
605
fprintf(stderr, "Establishing TLS session with %s\n", ip);
425
606
}
426
607
427
ret = gnutls_handshake (es.session);
428
429
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){
430
615
if(debug){
431
fprintf(stderr, "\n*** Handshake failed ***\n");
432
gnutls_perror (ret);
616
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
617
gnutls_perror(ret);
433
618
}
434
619
retval = -1;
435
goto exit;
620
goto mandos_end;
436
621
}
437
622
438
//Retrieve OpenPGP packet that contains the wanted password
623
/* Read OpenPGP packet that contains the wanted password */
439
624
440
625
if(debug){
441
626
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
442
627
ip);
443
628
}
444
629
445
630
while(true){
446
if (buffer_length + BUFFER_SIZE > buffer_capacity){
447
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
448
if (buffer == NULL){
449
perror("realloc");
450
goto exit;
451
}
452
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;
453
637
}
454
638
455
ret = gnutls_record_recv
456
(es.session, buffer+buffer_length, BUFFER_SIZE);
457
if (ret == 0){
639
sret = gnutls_record_recv(session, buffer+buffer_length,
640
BUFFER_SIZE);
641
if(sret == 0){
458
642
break;
459
643
}
460
if (ret < 0){
461
switch(ret){
644
if(sret < 0){
645
switch(sret){
462
646
case GNUTLS_E_INTERRUPTED:
463
647
case GNUTLS_E_AGAIN:
464
648
break;
465
649
case GNUTLS_E_REHANDSHAKE:
466
ret = gnutls_handshake (es.session);
467
if (ret < 0){
468
fprintf(stderr, "\n*** Handshake failed ***\n");
469
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);
470
656
retval = -1;
471
goto exit;
657
goto mandos_end;
472
658
}
473
659
break;
474
660
default:
475
661
fprintf(stderr, "Unknown error while reading data from"
476
" encrypted session with mandos server\n");
662
" encrypted session with Mandos server\n");
477
663
retval = -1;
478
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
479
goto exit;
664
gnutls_bye(session, GNUTLS_SHUT_RDWR);
665
goto mandos_end;
480
666
}
481
667
} else {
482
buffer_length += (size_t) ret;
668
buffer_length += (size_t) sret;
483
669
}
484
670
}
485
671
486
if (buffer_length > 0){
487
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,
488
680
buffer_length,
489
&decrypted_buffer,
490
CERT_ROOT);
491
if (decrypted_buffer_size >= 0){
681
&decrypted_buffer);
682
if(decrypted_buffer_size >= 0){
683
written = 0;
492
684
while(written < (size_t) decrypted_buffer_size){
493
ret = (int)fwrite (decrypted_buffer + written, 1,
494
(size_t)decrypted_buffer_size - written,
495
stdout);
685
ret = (int)fwrite(decrypted_buffer + written, 1,
686
(size_t)decrypted_buffer_size - written,
687
stdout);
496
688
if(ret == 0 and ferror(stdout)){
497
689
if(debug){
498
690
fprintf(stderr, "Error writing encrypted data: %s\n",
507
699
} else {
508
700
retval = -1;
509
701
}
510
}
511
512
//shutdown procedure
513
514
if(debug){
515
fprintf(stderr, "Closing TLS session\n");
516
}
517
702
} else {
703
retval = -1;
704
}
705
706
/* Shutdown procedure */
707
708
mandos_end:
518
709
free(buffer);
519
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
520
exit:
521
close(tcp_sd);
522
gnutls_deinit (es.session);
523
gnutls_certificate_free_credentials (es.cred);
524
gnutls_global_deinit ();
710
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
711
if(ret == -1){
712
perror("close");
713
}
714
gnutls_deinit(session);
525
715
return retval;
526
716
}
527
717
528
static AvahiSimplePoll *simple_poll = NULL;
529
static AvahiServer *server = NULL;
530
531
static void resolve_callback(
532
AvahiSServiceResolver *r,
533
AvahiIfIndex interface,
534
AVAHI_GCC_UNUSED AvahiProtocol protocol,
535
AvahiResolverEvent event,
536
const char *name,
537
const char *type,
538
const char *domain,
539
const char *host_name,
540
const AvahiAddress *address,
541
uint16_t port,
542
AVAHI_GCC_UNUSED AvahiStringList *txt,
543
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
544
AVAHI_GCC_UNUSED void* userdata) {
545
546
assert(r); /* Spurious warning */
718
static void resolve_callback(AvahiSServiceResolver *r,
719
AvahiIfIndex interface,
720
AVAHI_GCC_UNUSED AvahiProtocol protocol,
721
AvahiResolverEvent event,
722
const char *name,
723
const char *type,
724
const char *domain,
725
const char *host_name,
726
const AvahiAddress *address,
727
uint16_t port,
728
AVAHI_GCC_UNUSED AvahiStringList *txt,
729
AVAHI_GCC_UNUSED AvahiLookupResultFlags
730
flags,
731
void* userdata) {
732
mandos_context *mc = userdata;
733
assert(r);
547
734
548
735
/* Called whenever a service has been resolved successfully or
549
736
timed out */
550
737
551
switch (event) {
738
switch(event) {
552
739
default:
553
740
case AVAHI_RESOLVER_FAILURE:
554
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
555
" type '%s' in domain '%s': %s\n", name, type, domain,
556
avahi_strerror(avahi_server_errno(server)));
741
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
742
" of type '%s' in domain '%s': %s\n", name, type, domain,
743
avahi_strerror(avahi_server_errno(mc->server)));
557
744
break;
558
745
559
746
case AVAHI_RESOLVER_FOUND:
561
748
char ip[AVAHI_ADDRESS_STR_MAX];
562
749
avahi_address_snprint(ip, sizeof(ip), address);
563
750
if(debug){
564
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
565
" 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);
566
754
}
567
int ret = start_mandos_communication(ip, port, interface);
568
if (ret == 0){
569
exit(EXIT_SUCCESS);
755
int ret = start_mandos_communication(ip, port, interface, mc);
756
if(ret == 0){
757
avahi_simple_poll_quit(mc->simple_poll);
570
758
}
571
759
}
572
760
}
573
761
avahi_s_service_resolver_free(r);
574
762
}
575
763
576
static void browse_callback(
577
AvahiSServiceBrowser *b,
578
AvahiIfIndex interface,
579
AvahiProtocol protocol,
580
AvahiBrowserEvent event,
581
const char *name,
582
const char *type,
583
const char *domain,
584
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
585
void* userdata) {
586
587
AvahiServer *s = userdata;
588
assert(b); /* Spurious warning */
589
590
/* Called whenever a new services becomes available on the LAN or
591
is removed from the LAN */
592
593
switch (event) {
594
default:
595
case AVAHI_BROWSER_FAILURE:
596
597
fprintf(stderr, "(Browser) %s\n",
598
avahi_strerror(avahi_server_errno(server)));
599
avahi_simple_poll_quit(simple_poll);
600
return;
601
602
case AVAHI_BROWSER_NEW:
603
/* We ignore the returned resolver object. In the callback
604
function we free it. If the server is terminated before
605
the callback function is called the server will free
606
the resolver for us. */
607
608
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
609
type, domain,
610
AVAHI_PROTO_INET6, 0,
611
resolve_callback, s)))
612
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
613
avahi_strerror(avahi_server_errno(s)));
614
break;
615
616
case AVAHI_BROWSER_REMOVE:
617
break;
618
619
case AVAHI_BROWSER_ALL_FOR_NOW:
620
case AVAHI_BROWSER_CACHE_EXHAUSTED:
621
break;
764
static void browse_callback( AvahiSServiceBrowser *b,
765
AvahiIfIndex interface,
766
AvahiProtocol protocol,
767
AvahiBrowserEvent event,
768
const char *name,
769
const char *type,
770
const char *domain,
771
AVAHI_GCC_UNUSED AvahiLookupResultFlags
772
flags,
773
void* userdata) {
774
mandos_context *mc = userdata;
775
assert(b);
776
777
/* Called whenever a new services becomes available on the LAN or
778
is removed from the LAN */
779
780
switch(event) {
781
default:
782
case AVAHI_BROWSER_FAILURE:
783
784
fprintf(stderr, "(Avahi browser) %s\n",
785
avahi_strerror(avahi_server_errno(mc->server)));
786
avahi_simple_poll_quit(mc->simple_poll);
787
return;
788
789
case AVAHI_BROWSER_NEW:
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. */
794
795
if(!(avahi_s_service_resolver_new(mc->server, interface,
796
protocol, name, type, domain,
797
AVAHI_PROTO_INET6, 0,
798
resolve_callback, mc)))
799
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
800
name, avahi_strerror(avahi_server_errno(mc->server)));
801
break;
802
803
case AVAHI_BROWSER_REMOVE:
804
break;
805
806
case AVAHI_BROWSER_ALL_FOR_NOW:
807
case AVAHI_BROWSER_CACHE_EXHAUSTED:
808
if(debug){
809
fprintf(stderr, "No Mandos server found, still searching...\n");
622
810
}
811
break;
812
}
623
813
}
624
814
625
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
626
AvahiServerConfig config;
815
int main(int argc, char *argv[]){
627
816
AvahiSServiceBrowser *sb = NULL;
628
817
int error;
629
818
int ret;
630
int returncode = EXIT_SUCCESS;
631
const char *interface = NULL;
819
int exitcode = EXIT_SUCCESS;
820
const char *interface = "eth0";
821
struct ifreq network;
822
int sd;
823
uid_t uid;
824
gid_t gid;
825
char *connect_to = NULL;
826
char tempdir[] = "/tmp/mandosXXXXXX";
632
827
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
633
char *connect_to = NULL;
634
635
while (true){
636
static struct option long_options[] = {
637
{"debug", no_argument, (int *)&debug, 1},
638
{"connect", required_argument, 0, 'c'},
639
{"interface", required_argument, 0, 'i'},
640
{0, 0, 0, 0} };
641
642
int option_index = 0;
643
ret = getopt_long (argc, argv, "i:", long_options,
644
&option_index);
645
646
if (ret == -1){
647
break;
648
}
649
650
switch(ret){
651
case 0:
652
break;
653
case 'i':
654
interface = optarg;
655
break;
656
case 'c':
657
connect_to = optarg;
658
break;
659
default:
660
exit(EXIT_FAILURE);
661
}
662
}
663
664
if(interface != NULL){
665
if_index = (AvahiIfIndex) if_nametoindex(interface);
666
if(if_index == 0){
667
fprintf(stderr, "No such interface: \"%s\"\n", interface);
668
exit(EXIT_FAILURE);
669
}
828
const char *seckey = PATHDIR "/" SECKEY;
829
const char *pubkey = PATHDIR "/" PUBKEY;
830
831
mandos_context mc = { .simple_poll = NULL, .server = NULL,
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;
984
}
985
986
if_index = (AvahiIfIndex) if_nametoindex(interface);
987
if(if_index == 0){
988
fprintf(stderr, "No such interface: \"%s\"\n", interface);
989
exit(EXIT_FAILURE);
670
990
}
671
991
672
992
if(connect_to != NULL){
675
995
char *address = strrchr(connect_to, ':');
676
996
if(address == NULL){
677
997
fprintf(stderr, "No colon in address\n");
678
exit(EXIT_FAILURE);
998
exitcode = EXIT_FAILURE;
999
goto end;
679
1000
}
680
errno = 0;
681
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
682
if(errno){
683
perror("Bad port number");
684
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;
685
1007
}
686
1008
*address = '\0';
687
1009
address = connect_to;
688
ret = start_mandos_communication(address, port, if_index);
1010
ret = start_mandos_communication(address, port, if_index, &mc);
689
1011
if(ret < 0){
690
exit(EXIT_FAILURE);
1012
exitcode = EXIT_FAILURE;
691
1013
} else {
692
exit(EXIT_SUCCESS);
1014
exitcode = EXIT_SUCCESS;
693
1015
}
1016
goto end;
694
1017
}
695
1018
696
if (not debug){
1019
if(not debug){
697
1020
avahi_set_log_function(empty_log);
698
1021
}
699
1022
700
/* Initialize the psuedo-RNG */
1023
/* Initialize the pseudo-RNG for Avahi */
701
1024
srand((unsigned int) time(NULL));
702
703
/* Allocate main loop object */
704
if (!(simple_poll = avahi_simple_poll_new())) {
705
fprintf(stderr, "Failed to create simple poll object.\n");
706
707
goto exit;
708
}
709
710
/* Do not publish any local records */
711
avahi_server_config_init(&config);
712
config.publish_hinfo = 0;
713
config.publish_addresses = 0;
714
config.publish_workstation = 0;
715
config.publish_domain = 0;
716
717
/* Allocate a new server */
718
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
719
&config, NULL, NULL, &error);
720
721
/* Free the configuration data */
722
avahi_server_config_free(&config);
723
724
/* Check if creating the server object succeeded */
725
if (!server) {
726
fprintf(stderr, "Failed to create server: %s\n",
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",
727
1056
avahi_strerror(error));
728
returncode = EXIT_FAILURE;
729
goto exit;
1057
exitcode = EXIT_FAILURE;
1058
goto end;
730
1059
}
731
1060
732
/* Create the service browser */
733
sb = avahi_s_service_browser_new(server, if_index,
1061
/* Create the Avahi service browser */
1062
sb = avahi_s_service_browser_new(mc.server, if_index,
734
1063
AVAHI_PROTO_INET6,
735
1064
"_mandos._tcp", NULL, 0,
736
browse_callback, server);
737
if (!sb) {
1065
browse_callback, &mc);
1066
if(sb == NULL) {
738
1067
fprintf(stderr, "Failed to create service browser: %s\n",
739
avahi_strerror(avahi_server_errno(server)));
740
returncode = EXIT_FAILURE;
741
goto exit;
1068
avahi_strerror(avahi_server_errno(mc.server)));
1069
exitcode = EXIT_FAILURE;
1070
goto end;
742
1071
}
743
1072
744
1073
/* Run the main loop */
745
746
if (debug){
747
fprintf(stderr, "Starting avahi loop search\n");
1074
1075
if(debug){
1076
fprintf(stderr, "Starting Avahi loop search\n");
748
1077
}
749
1078
750
avahi_simple_poll_loop(simple_poll);
751
752
exit:
753
754
if (debug){
1079
avahi_simple_poll_loop(mc.simple_poll);
1080
1081
end:
1082
1083
if(debug){
755
1084
fprintf(stderr, "%s exiting\n", argv[0]);
756
1085
}
757
1086
758
1087
/* Cleanup things */
759
if (sb)
1088
if(sb != NULL)
760
1089
avahi_s_service_browser_free(sb);
761
1090
762
if (server)
763
avahi_server_free(server);
764
765
if (simple_poll)
766
avahi_simple_poll_free(simple_poll);
767
768
return returncode;
1091
if(mc.server != NULL)
1092
avahi_server_free(mc.server);
1093
1094
if(mc.simple_poll != NULL)
1095
avahi_simple_poll_free(mc.simple_poll);
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;
769
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0