To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 263
- compare with another revision
- download diff
- download tarball
- view history from revision 263
- Committer: Teddy Hogeborn
- Date: 2009-01-12 22:02:33 UTC
- Revision ID: teddy@fukt.bsnet.se-20090112220233-lawxo4uvyzb38u1f
* README (The Plugin System): Removed redundant text about options and
files for the plugins, this is now
documented in the manuals for the
plugins.
* plugins.d/mandos-client.c (main): Remove comment which was copied
from another program by mistake.
Use "sscanf" instead of "strtol"
to parse numbers; this uses the
correct type instead of casting.
Don't report errors when removing
temporary directory if directory
is already gone.
files for the plugins, this is now
documented in the manuals for the
plugins.
* plugins.d/mandos-client.c (main): Remove comment which was copied
from another program by mistake.
Use "sscanf" instead of "strtol"
to parse numbers; this uses the
correct type instead of casting.
Don't report errors when removing
temporary directory if directory
is already gone.
- 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, SIOCSIFFLAGS
41
#include <net/if.h> // ioctl, ifreq, SIOCGIFFLAGS, IFF_UP, SIOCSIFFLAGS
42
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(), DIR */
52
#include <sys/stat.h> /* open() */
53
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
54
struct in6_addr, inet_pton(),
55
connect() */
56
#include <fcntl.h> /* open() */
57
#include <dirent.h> /* opendir(), struct dirent, readdir() */
58
#include <inttypes.h> /* PRIu16, SCNu16 */
59
#include <assert.h> /* assert() */
60
#include <errno.h> /* perror(), errno */
61
#include <time.h> /* time() */
62
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
63
SIOCSIFFLAGS, if_indextoname(),
64
if_nametoindex(), IF_NAMESIZE */
65
#include <netinet/in.h>
66
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
67
getuid(), getgid(), setuid(),
68
setgid() */
69
#include <arpa/inet.h> /* inet_pton(), htons */
70
#include <iso646.h> /* not, and, or */
71
#include <argp.h> /* struct argp_option, error_t, struct
72
argp_state, struct argp,
73
argp_parse(), ARGP_KEY_ARG,
74
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
75
76
/* Avahi */
77
/* All Avahi types, constants and functions
78
Avahi*, avahi_*,
79
AVAHI_* */
43
80
#include <avahi-core/core.h>
44
81
#include <avahi-core/lookup.h>
45
82
#include <avahi-core/log.h>
47
84
#include <avahi-common/malloc.h>
48
85
#include <avahi-common/error.h>
49
86
50
//mandos client part
51
#include <sys/types.h> /* socket(), inet_pton() */
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton() */
54
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
55
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
56
57
#include <unistd.h> /* close() */
58
#include <netinet/in.h>
59
#include <stdbool.h> /* true */
60
#include <string.h> /* memset */
61
#include <arpa/inet.h> /* inet_pton() */
62
#include <iso646.h> /* not */
63
64
// gpgme
65
#include <errno.h> /* perror() */
66
#include <gpgme.h>
67
68
// getopt long
69
#include <getopt.h>
87
/* GnuTLS */
88
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
89
functions:
90
gnutls_*
91
init_gnutls_session(),
92
GNUTLS_* */
93
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
94
GNUTLS_OPENPGP_FMT_BASE64 */
95
96
/* GPGME */
97
#include <gpgme.h> /* All GPGME types, constants and
98
functions:
99
gpgme_*
100
GPGME_PROTOCOL_OpenPGP,
101
GPG_ERR_NO_* */
70
102
71
103
#define BUFFER_SIZE 256
72
#define DH_BITS 1024
73
104
74
static const char *certdir = "/conf/conf.d/mandos";
75
static const char *certfile = "openpgp-client.txt";
76
static const char *certkey = "openpgp-client-key.txt";
105
#define PATHDIR "/conf/conf.d/mandos"
106
#define SECKEY "seckey.txt"
107
#define PUBKEY "pubkey.txt"
77
108
78
109
bool debug = false;
110
static const char mandos_protocol_version[] = "1";
111
const char *argp_program_version = "mandos-client " VERSION;
112
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
79
113
114
/* Used for passing in values through the Avahi callback functions */
80
115
typedef struct {
81
116
AvahiSimplePoll *simple_poll;
82
117
AvahiServer *server;
83
118
gnutls_certificate_credentials_t cred;
84
119
unsigned int dh_bits;
120
gnutls_dh_params_t dh_params;
85
121
const char *priority;
122
gpgme_ctx_t ctx;
86
123
} mandos_context;
87
124
88
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
89
char **new_packet,
90
const char *homedir){
91
gpgme_data_t dh_crypto, dh_plain;
92
gpgme_ctx_t ctx;
125
/*
126
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
127
* "buffer_capacity" is how much is currently allocated,
128
* "buffer_length" is how much is already used.
129
*/
130
size_t adjustbuffer(char **buffer, size_t buffer_length,
131
size_t buffer_capacity){
132
if (buffer_length + BUFFER_SIZE > buffer_capacity){
133
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
134
if (buffer == NULL){
135
return 0;
136
}
137
buffer_capacity += BUFFER_SIZE;
138
}
139
return buffer_capacity;
140
}
141
142
/*
143
* Initialize GPGME.
144
*/
145
static bool init_gpgme(mandos_context *mc, const char *seckey,
146
const char *pubkey, const char *tempdir){
147
int ret;
93
148
gpgme_error_t rc;
94
ssize_t ret;
95
ssize_t new_packet_capacity = 0;
96
ssize_t new_packet_length = 0;
97
149
gpgme_engine_info_t engine_info;
98
150
151
152
/*
153
* Helper function to insert pub and seckey to the enigne keyring.
154
*/
155
bool import_key(const char *filename){
156
int fd;
157
gpgme_data_t pgp_data;
158
159
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
160
if(fd == -1){
161
perror("open");
162
return false;
163
}
164
165
rc = gpgme_data_new_from_fd(&pgp_data, fd);
166
if (rc != GPG_ERR_NO_ERROR){
167
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
168
gpgme_strsource(rc), gpgme_strerror(rc));
169
return false;
170
}
171
172
rc = gpgme_op_import(mc->ctx, pgp_data);
173
if (rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
ret = (int)TEMP_FAILURE_RETRY(close(fd));
180
if(ret == -1){
181
perror("close");
182
}
183
gpgme_data_release(pgp_data);
184
return true;
185
}
186
99
187
if (debug){
100
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
188
fprintf(stderr, "Initialize gpgme\n");
101
189
}
102
190
103
191
/* Init GPGME */
106
194
if (rc != GPG_ERR_NO_ERROR){
107
195
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
108
196
gpgme_strsource(rc), gpgme_strerror(rc));
109
return -1;
197
return false;
110
198
}
111
199
112
/* Set GPGME home directory */
200
/* Set GPGME home directory for the OpenPGP engine only */
113
201
rc = gpgme_get_engine_info (&engine_info);
114
202
if (rc != GPG_ERR_NO_ERROR){
115
203
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
116
204
gpgme_strsource(rc), gpgme_strerror(rc));
117
return -1;
205
return false;
118
206
}
119
207
while(engine_info != NULL){
120
208
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
121
209
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
122
engine_info->file_name, homedir);
210
engine_info->file_name, tempdir);
123
211
break;
124
212
}
125
213
engine_info = engine_info->next;
126
214
}
127
215
if(engine_info == NULL){
128
fprintf(stderr, "Could not set home dir to %s\n", homedir);
129
return -1;
130
}
131
132
/* Create new GPGME data buffer from packet buffer */
133
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
216
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
217
return false;
218
}
219
220
/* Create new GPGME "context" */
221
rc = gpgme_new(&(mc->ctx));
222
if (rc != GPG_ERR_NO_ERROR){
223
fprintf(stderr, "bad gpgme_new: %s: %s\n",
224
gpgme_strsource(rc), gpgme_strerror(rc));
225
return false;
226
}
227
228
if (not import_key(pubkey) or not import_key(seckey)){
229
return false;
230
}
231
232
return true;
233
}
234
235
/*
236
* Decrypt OpenPGP data.
237
* Returns -1 on error
238
*/
239
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
240
const char *cryptotext,
241
size_t crypto_size,
242
char **plaintext){
243
gpgme_data_t dh_crypto, dh_plain;
244
gpgme_error_t rc;
245
ssize_t ret;
246
size_t plaintext_capacity = 0;
247
ssize_t plaintext_length = 0;
248
249
if (debug){
250
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
251
}
252
253
/* Create new GPGME data buffer from memory cryptotext */
254
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
255
0);
134
256
if (rc != GPG_ERR_NO_ERROR){
135
257
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
136
258
gpgme_strsource(rc), gpgme_strerror(rc));
142
264
if (rc != GPG_ERR_NO_ERROR){
143
265
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
144
266
gpgme_strsource(rc), gpgme_strerror(rc));
145
return -1;
146
}
147
148
/* Create new GPGME "context" */
149
rc = gpgme_new(&ctx);
150
if (rc != GPG_ERR_NO_ERROR){
151
fprintf(stderr, "bad gpgme_new: %s: %s\n",
152
gpgme_strsource(rc), gpgme_strerror(rc));
153
return -1;
154
}
155
156
/* Decrypt data from the FILE pointer to the plaintext data
157
buffer */
158
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
267
gpgme_data_release(dh_crypto);
268
return -1;
269
}
270
271
/* Decrypt data from the cryptotext data buffer to the plaintext
272
data buffer */
273
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
159
274
if (rc != GPG_ERR_NO_ERROR){
160
275
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
161
276
gpgme_strsource(rc), gpgme_strerror(rc));
162
return -1;
277
plaintext_length = -1;
278
if (debug){
279
gpgme_decrypt_result_t result;
280
result = gpgme_op_decrypt_result(mc->ctx);
281
if (result == NULL){
282
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
283
} else {
284
fprintf(stderr, "Unsupported algorithm: %s\n",
285
result->unsupported_algorithm);
286
fprintf(stderr, "Wrong key usage: %u\n",
287
result->wrong_key_usage);
288
if(result->file_name != NULL){
289
fprintf(stderr, "File name: %s\n", result->file_name);
290
}
291
gpgme_recipient_t recipient;
292
recipient = result->recipients;
293
if(recipient){
294
while(recipient != NULL){
295
fprintf(stderr, "Public key algorithm: %s\n",
296
gpgme_pubkey_algo_name(recipient->pubkey_algo));
297
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
298
fprintf(stderr, "Secret key available: %s\n",
299
recipient->status == GPG_ERR_NO_SECKEY
300
? "No" : "Yes");
301
recipient = recipient->next;
302
}
303
}
304
}
305
}
306
goto decrypt_end;
163
307
}
164
308
165
309
if(debug){
166
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
167
}
168
169
if (debug){
170
gpgme_decrypt_result_t result;
171
result = gpgme_op_decrypt_result(ctx);
172
if (result == NULL){
173
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
174
} else {
175
fprintf(stderr, "Unsupported algorithm: %s\n",
176
result->unsupported_algorithm);
177
fprintf(stderr, "Wrong key usage: %d\n",
178
result->wrong_key_usage);
179
if(result->file_name != NULL){
180
fprintf(stderr, "File name: %s\n", result->file_name);
181
}
182
gpgme_recipient_t recipient;
183
recipient = result->recipients;
184
if(recipient){
185
while(recipient != NULL){
186
fprintf(stderr, "Public key algorithm: %s\n",
187
gpgme_pubkey_algo_name(recipient->pubkey_algo));
188
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
189
fprintf(stderr, "Secret key available: %s\n",
190
recipient->status == GPG_ERR_NO_SECKEY
191
? "No" : "Yes");
192
recipient = recipient->next;
193
}
194
}
195
}
196
}
197
198
/* Delete the GPGME FILE pointer cryptotext data buffer */
199
gpgme_data_release(dh_crypto);
310
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
311
}
200
312
201
313
/* Seek back to the beginning of the GPGME plaintext data buffer */
202
314
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
203
perror("pgpme_data_seek");
315
perror("gpgme_data_seek");
316
plaintext_length = -1;
317
goto decrypt_end;
204
318
}
205
319
206
*new_packet = 0;
320
*plaintext = NULL;
207
321
while(true){
208
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
209
*new_packet = realloc(*new_packet,
210
(unsigned int)new_packet_capacity
211
+ BUFFER_SIZE);
212
if (*new_packet == NULL){
213
perror("realloc");
214
return -1;
215
}
216
new_packet_capacity += BUFFER_SIZE;
322
plaintext_capacity = adjustbuffer(plaintext,
323
(size_t)plaintext_length,
324
plaintext_capacity);
325
if (plaintext_capacity == 0){
326
perror("adjustbuffer");
327
plaintext_length = -1;
328
goto decrypt_end;
217
329
}
218
330
219
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
331
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
220
332
BUFFER_SIZE);
221
333
/* Print the data, if any */
222
334
if (ret == 0){
335
/* EOF */
223
336
break;
224
337
}
225
338
if(ret < 0){
226
339
perror("gpgme_data_read");
227
return -1;
228
}
229
new_packet_length += ret;
230
}
231
232
/* FIXME: check characters before printing to screen so to not print
233
terminal control characters */
234
/* if(debug){ */
235
/* fprintf(stderr, "decrypted password is: "); */
236
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
237
/* fprintf(stderr, "\n"); */
238
/* } */
340
plaintext_length = -1;
341
goto decrypt_end;
342
}
343
plaintext_length += ret;
344
}
345
346
if(debug){
347
fprintf(stderr, "Decrypted password is: ");
348
for(ssize_t i = 0; i < plaintext_length; i++){
349
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
350
}
351
fprintf(stderr, "\n");
352
}
353
354
decrypt_end:
355
356
/* Delete the GPGME cryptotext data buffer */
357
gpgme_data_release(dh_crypto);
239
358
240
359
/* Delete the GPGME plaintext data buffer */
241
360
gpgme_data_release(dh_plain);
242
return new_packet_length;
361
return plaintext_length;
243
362
}
244
363
245
364
static const char * safer_gnutls_strerror (int value) {
246
const char *ret = gnutls_strerror (value);
365
const char *ret = gnutls_strerror (value); /* Spurious warning */
247
366
if (ret == NULL)
248
367
ret = "(unknown)";
249
368
return ret;
250
369
}
251
370
371
/* GnuTLS log function callback */
252
372
static void debuggnutls(__attribute__((unused)) int level,
253
373
const char* string){
254
fprintf(stderr, "%s", string);
374
fprintf(stderr, "GnuTLS: %s", string);
255
375
}
256
376
257
static int initgnutls(mandos_context *mc){
258
const char *err;
377
static int init_gnutls_global(mandos_context *mc,
378
const char *pubkeyfilename,
379
const char *seckeyfilename){
259
380
int ret;
260
381
261
382
if(debug){
262
383
fprintf(stderr, "Initializing GnuTLS\n");
263
384
}
264
265
if ((ret = gnutls_global_init ())
266
!= GNUTLS_E_SUCCESS) {
267
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
385
386
ret = gnutls_global_init();
387
if (ret != GNUTLS_E_SUCCESS) {
388
fprintf (stderr, "GnuTLS global_init: %s\n",
389
safer_gnutls_strerror(ret));
268
390
return -1;
269
391
}
270
392
271
393
if (debug){
394
/* "Use a log level over 10 to enable all debugging options."
395
* - GnuTLS manual
396
*/
272
397
gnutls_global_set_log_level(11);
273
398
gnutls_global_set_log_function(debuggnutls);
274
399
}
275
400
276
/* openpgp credentials */
277
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
278
!= GNUTLS_E_SUCCESS) {
279
fprintf (stderr, "memory error: %s\n",
401
/* OpenPGP credentials */
402
gnutls_certificate_allocate_credentials(&mc->cred);
403
if (ret != GNUTLS_E_SUCCESS){
404
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
405
warning */
280
406
safer_gnutls_strerror(ret));
407
gnutls_global_deinit ();
281
408
return -1;
282
409
}
283
410
284
411
if(debug){
285
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
286
" and keyfile %s as GnuTLS credentials\n", certfile,
287
certkey);
412
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
413
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
414
seckeyfilename);
288
415
}
289
416
290
417
ret = gnutls_certificate_set_openpgp_key_file
291
(es->cred, certfile, certkey, GNUTLS_OPENPGP_FMT_BASE64);
418
(mc->cred, pubkeyfilename, seckeyfilename,
419
GNUTLS_OPENPGP_FMT_BASE64);
292
420
if (ret != GNUTLS_E_SUCCESS) {
293
fprintf
294
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
295
" '%s')\n",
296
ret, certfile, certkey);
297
fprintf(stdout, "The Error is: %s\n",
421
fprintf(stderr,
422
"Error[%d] while reading the OpenPGP key pair ('%s',"
423
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
424
fprintf(stderr, "The GnuTLS error is: %s\n",
298
425
safer_gnutls_strerror(ret));
299
return -1;
300
}
301
302
//GnuTLS server initialization
303
if ((ret = gnutls_dh_params_init (&es->dh_params))
304
!= GNUTLS_E_SUCCESS) {
305
fprintf (stderr, "Error in dh parameter initialization: %s\n",
306
safer_gnutls_strerror(ret));
307
return -1;
308
}
309
310
if ((ret = gnutls_dh_params_generate2 (es->dh_params, DH_BITS))
311
!= GNUTLS_E_SUCCESS) {
312
fprintf (stderr, "Error in prime generation: %s\n",
313
safer_gnutls_strerror(ret));
314
return -1;
315
}
316
317
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
318
319
// GnuTLS session creation
320
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
321
!= GNUTLS_E_SUCCESS){
426
goto globalfail;
427
}
428
429
/* GnuTLS server initialization */
430
ret = gnutls_dh_params_init(&mc->dh_params);
431
if (ret != GNUTLS_E_SUCCESS) {
432
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
433
" %s\n", safer_gnutls_strerror(ret));
434
goto globalfail;
435
}
436
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
437
if (ret != GNUTLS_E_SUCCESS) {
438
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
439
safer_gnutls_strerror(ret));
440
goto globalfail;
441
}
442
443
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
444
445
return 0;
446
447
globalfail:
448
449
gnutls_certificate_free_credentials(mc->cred);
450
gnutls_global_deinit();
451
gnutls_dh_params_deinit(mc->dh_params);
452
return -1;
453
}
454
455
static int init_gnutls_session(mandos_context *mc,
456
gnutls_session_t *session){
457
int ret;
458
/* GnuTLS session creation */
459
ret = gnutls_init(session, GNUTLS_SERVER);
460
if (ret != GNUTLS_E_SUCCESS){
322
461
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
323
462
safer_gnutls_strerror(ret));
324
463
}
325
464
326
if ((ret = gnutls_priority_set_direct (es->session, mc->priority, &err))
327
!= GNUTLS_E_SUCCESS) {
328
fprintf(stderr, "Syntax error at: %s\n", err);
329
fprintf(stderr, "GnuTLS error: %s\n",
330
safer_gnutls_strerror(ret));
331
return -1;
465
{
466
const char *err;
467
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
468
if (ret != GNUTLS_E_SUCCESS) {
469
fprintf(stderr, "Syntax error at: %s\n", err);
470
fprintf(stderr, "GnuTLS error: %s\n",
471
safer_gnutls_strerror(ret));
472
gnutls_deinit (*session);
473
return -1;
474
}
332
475
}
333
476
334
if ((ret = gnutls_credentials_set
335
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
336
!= GNUTLS_E_SUCCESS) {
337
fprintf(stderr, "Error setting a credentials set: %s\n",
477
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
478
mc->cred);
479
if (ret != GNUTLS_E_SUCCESS) {
480
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
338
481
safer_gnutls_strerror(ret));
482
gnutls_deinit (*session);
339
483
return -1;
340
484
}
341
485
342
486
/* ignore client certificate if any. */
343
gnutls_certificate_server_set_request (es->session,
487
gnutls_certificate_server_set_request (*session,
344
488
GNUTLS_CERT_IGNORE);
345
489
346
gnutls_dh_set_prime_bits (es->session, DH_BITS);
490
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
347
491
348
492
return 0;
349
493
}
350
494
495
/* Avahi log function callback */
351
496
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
352
497
__attribute__((unused)) const char *txt){}
353
498
499
/* Called when a Mandos server is found */
354
500
static int start_mandos_communication(const char *ip, uint16_t port,
355
501
AvahiIfIndex if_index,
356
502
mandos_context *mc){
357
503
int ret, tcp_sd;
358
struct sockaddr_in6 to;
359
encrypted_session es;
504
ssize_t sret;
505
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
360
506
char *buffer = NULL;
361
507
char *decrypted_buffer;
362
508
size_t buffer_length = 0;
363
509
size_t buffer_capacity = 0;
364
510
ssize_t decrypted_buffer_size;
365
size_t written = 0;
511
size_t written;
366
512
int retval = 0;
367
513
char interface[IF_NAMESIZE];
514
gnutls_session_t session;
515
516
ret = init_gnutls_session (mc, &session);
517
if (ret != 0){
518
return -1;
519
}
368
520
369
521
if(debug){
370
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
371
ip, port);
522
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
523
"\n", ip, port);
372
524
}
373
525
374
526
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
376
528
perror("socket");
377
529
return -1;
378
530
}
379
531
380
532
if(debug){
381
533
if(if_indextoname((unsigned int)if_index, interface) == NULL){
382
if(debug){
383
perror("if_indextoname");
384
}
534
perror("if_indextoname");
385
535
return -1;
386
536
}
387
388
537
fprintf(stderr, "Binding to interface %s\n", interface);
389
538
}
390
539
391
memset(&to,0,sizeof(to)); /* Spurious warning */
392
to.sin6_family = AF_INET6;
393
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
540
memset(&to, 0, sizeof(to));
541
to.in6.sin6_family = AF_INET6;
542
/* It would be nice to have a way to detect if we were passed an
543
IPv4 address here. Now we assume an IPv6 address. */
544
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
394
545
if (ret < 0 ){
395
546
perror("inet_pton");
396
547
return -1;
397
}
548
}
398
549
if(ret == 0){
399
550
fprintf(stderr, "Bad address: %s\n", ip);
400
551
return -1;
401
552
}
402
to.sin6_port = htons(port); /* Spurious warning */
553
to.in6.sin6_port = htons(port); /* Spurious warning */
403
554
404
to.sin6_scope_id = (uint32_t)if_index;
555
to.in6.sin6_scope_id = (uint32_t)if_index;
405
556
406
557
if(debug){
407
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
408
/* char addrstr[INET6_ADDRSTRLEN]; */
409
/* if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr, */
410
/* sizeof(addrstr)) == NULL){ */
411
/* perror("inet_ntop"); */
412
/* } else { */
413
/* fprintf(stderr, "Really connecting to: %s, port %d\n", */
414
/* addrstr, ntohs(to.sin6_port)); */
415
/* } */
558
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
559
port);
560
char addrstr[INET6_ADDRSTRLEN] = "";
561
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
562
sizeof(addrstr)) == NULL){
563
perror("inet_ntop");
564
} else {
565
if(strcmp(addrstr, ip) != 0){
566
fprintf(stderr, "Canonical address form: %s\n", addrstr);
567
}
568
}
416
569
}
417
570
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
571
ret = connect(tcp_sd, &to.in, sizeof(to));
419
572
if (ret < 0){
420
573
perror("connect");
421
574
return -1;
422
575
}
423
576
424
ret = initgnutls (&es);
425
if (ret != 0){
426
retval = -1;
427
return -1;
577
const char *out = mandos_protocol_version;
578
written = 0;
579
while (true){
580
size_t out_size = strlen(out);
581
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
582
out_size - written));
583
if (ret == -1){
584
perror("write");
585
retval = -1;
586
goto mandos_end;
587
}
588
written += (size_t)ret;
589
if(written < out_size){
590
continue;
591
} else {
592
if (out == mandos_protocol_version){
593
written = 0;
594
out = "\r\n";
595
} else {
596
break;
597
}
598
}
428
599
}
429
600
430
gnutls_transport_set_ptr (es.session,
431
(gnutls_transport_ptr_t) tcp_sd);
432
433
601
if(debug){
434
602
fprintf(stderr, "Establishing TLS session with %s\n", ip);
435
603
}
436
604
437
ret = gnutls_handshake (es.session);
605
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
606
607
do{
608
ret = gnutls_handshake (session);
609
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
438
610
439
611
if (ret != GNUTLS_E_SUCCESS){
440
612
if(debug){
441
fprintf(stderr, "\n*** Handshake failed ***\n");
613
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
442
614
gnutls_perror (ret);
443
615
}
444
616
retval = -1;
445
goto exit;
617
goto mandos_end;
446
618
}
447
619
448
//Retrieve OpenPGP packet that contains the wanted password
620
/* Read OpenPGP packet that contains the wanted password */
449
621
450
622
if(debug){
451
623
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
452
624
ip);
453
625
}
454
626
455
627
while(true){
456
if (buffer_length + BUFFER_SIZE > buffer_capacity){
457
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
458
if (buffer == NULL){
459
perror("realloc");
460
goto exit;
461
}
462
buffer_capacity += BUFFER_SIZE;
628
buffer_capacity = adjustbuffer(&buffer, buffer_length,
629
buffer_capacity);
630
if (buffer_capacity == 0){
631
perror("adjustbuffer");
632
retval = -1;
633
goto mandos_end;
463
634
}
464
635
465
ret = gnutls_record_recv
466
(es.session, buffer+buffer_length, BUFFER_SIZE);
467
if (ret == 0){
636
sret = gnutls_record_recv(session, buffer+buffer_length,
637
BUFFER_SIZE);
638
if (sret == 0){
468
639
break;
469
640
}
470
if (ret < 0){
471
switch(ret){
641
if (sret < 0){
642
switch(sret){
472
643
case GNUTLS_E_INTERRUPTED:
473
644
case GNUTLS_E_AGAIN:
474
645
break;
475
646
case GNUTLS_E_REHANDSHAKE:
476
ret = gnutls_handshake (es.session);
647
do{
648
ret = gnutls_handshake (session);
649
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
477
650
if (ret < 0){
478
fprintf(stderr, "\n*** Handshake failed ***\n");
651
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
479
652
gnutls_perror (ret);
480
653
retval = -1;
481
goto exit;
654
goto mandos_end;
482
655
}
483
656
break;
484
657
default:
485
658
fprintf(stderr, "Unknown error while reading data from"
486
" encrypted session with mandos server\n");
659
" encrypted session with Mandos server\n");
487
660
retval = -1;
488
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
489
goto exit;
661
gnutls_bye (session, GNUTLS_SHUT_RDWR);
662
goto mandos_end;
490
663
}
491
664
} else {
492
buffer_length += (size_t) ret;
665
buffer_length += (size_t) sret;
493
666
}
494
667
}
495
668
669
if(debug){
670
fprintf(stderr, "Closing TLS session\n");
671
}
672
673
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
496
675
if (buffer_length > 0){
497
decrypted_buffer_size = pgp_packet_decrypt(buffer,
676
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
498
677
buffer_length,
499
&decrypted_buffer,
500
certdir);
678
&decrypted_buffer);
501
679
if (decrypted_buffer_size >= 0){
680
written = 0;
502
681
while(written < (size_t) decrypted_buffer_size){
503
682
ret = (int)fwrite (decrypted_buffer + written, 1,
504
683
(size_t)decrypted_buffer_size - written,
517
696
} else {
518
697
retval = -1;
519
698
}
520
}
521
522
//shutdown procedure
523
524
if(debug){
525
fprintf(stderr, "Closing TLS session\n");
526
}
527
699
} else {
700
retval = -1;
701
}
702
703
/* Shutdown procedure */
704
705
mandos_end:
528
706
free(buffer);
529
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
530
exit:
531
close(tcp_sd);
532
gnutls_deinit (es.session);
533
gnutls_certificate_free_credentials (es.cred);
534
gnutls_global_deinit ();
707
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
708
if(ret == -1){
709
perror("close");
710
}
711
gnutls_deinit (session);
535
712
return retval;
536
713
}
537
714
538
static void resolve_callback( AvahiSServiceResolver *r,
539
AvahiIfIndex interface,
540
AVAHI_GCC_UNUSED AvahiProtocol protocol,
541
AvahiResolverEvent event,
542
const char *name,
543
const char *type,
544
const char *domain,
545
const char *host_name,
546
const AvahiAddress *address,
547
uint16_t port,
548
AVAHI_GCC_UNUSED AvahiStringList *txt,
549
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
550
AVAHI_GCC_UNUSED void* userdata) {
715
static void resolve_callback(AvahiSServiceResolver *r,
716
AvahiIfIndex interface,
717
AVAHI_GCC_UNUSED AvahiProtocol protocol,
718
AvahiResolverEvent event,
719
const char *name,
720
const char *type,
721
const char *domain,
722
const char *host_name,
723
const AvahiAddress *address,
724
uint16_t port,
725
AVAHI_GCC_UNUSED AvahiStringList *txt,
726
AVAHI_GCC_UNUSED AvahiLookupResultFlags
727
flags,
728
void* userdata) {
551
729
mandos_context *mc = userdata;
552
assert(r); /* Spurious warning */
730
assert(r);
553
731
554
732
/* Called whenever a service has been resolved successfully or
555
733
timed out */
557
735
switch (event) {
558
736
default:
559
737
case AVAHI_RESOLVER_FAILURE:
560
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
561
" type '%s' in domain '%s': %s\n", name, type, domain,
738
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
739
" of type '%s' in domain '%s': %s\n", name, type, domain,
562
740
avahi_strerror(avahi_server_errno(mc->server)));
563
741
break;
564
742
567
745
char ip[AVAHI_ADDRESS_STR_MAX];
568
746
avahi_address_snprint(ip, sizeof(ip), address);
569
747
if(debug){
570
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
571
" port %d\n", name, host_name, ip, port);
748
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
749
PRIu16 ") on port %d\n", name, host_name, ip,
750
interface, port);
572
751
}
573
752
int ret = start_mandos_communication(ip, port, interface, mc);
574
753
if (ret == 0){
575
exit(EXIT_SUCCESS);
754
avahi_simple_poll_quit(mc->simple_poll);
576
755
}
577
756
}
578
757
}
586
765
const char *name,
587
766
const char *type,
588
767
const char *domain,
589
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
768
AVAHI_GCC_UNUSED AvahiLookupResultFlags
769
flags,
590
770
void* userdata) {
591
771
mandos_context *mc = userdata;
592
assert(b); /* Spurious warning */
772
assert(b);
593
773
594
774
/* Called whenever a new services becomes available on the LAN or
595
775
is removed from the LAN */
597
777
switch (event) {
598
778
default:
599
779
case AVAHI_BROWSER_FAILURE:
600
601
fprintf(stderr, "(Browser) %s\n",
780
781
fprintf(stderr, "(Avahi browser) %s\n",
602
782
avahi_strerror(avahi_server_errno(mc->server)));
603
783
avahi_simple_poll_quit(mc->simple_poll);
604
784
return;
605
785
606
786
case AVAHI_BROWSER_NEW:
607
/* We ignore the returned resolver object. In the callback
608
function we free it. If the server is terminated before
609
the callback function is called the server will free
610
the resolver for us. */
611
612
if (!(avahi_s_service_resolver_new(mc->server, interface, protocol, name,
613
type, domain,
787
/* We ignore the returned Avahi resolver object. In the callback
788
function we free it. If the Avahi server is terminated before
789
the callback function is called the Avahi server will free the
790
resolver for us. */
791
792
if (!(avahi_s_service_resolver_new(mc->server, interface,
793
protocol, name, type, domain,
614
794
AVAHI_PROTO_INET6, 0,
615
795
resolve_callback, mc)))
616
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
617
avahi_strerror(avahi_server_errno(s)));
796
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
797
name, avahi_strerror(avahi_server_errno(mc->server)));
618
798
break;
619
799
620
800
case AVAHI_BROWSER_REMOVE:
621
801
break;
622
802
623
803
case AVAHI_BROWSER_ALL_FOR_NOW:
624
804
case AVAHI_BROWSER_CACHE_EXHAUSTED:
805
if(debug){
806
fprintf(stderr, "No Mandos server found, still searching...\n");
807
}
625
808
break;
626
809
}
627
810
}
628
811
629
/* Combines file name and path and returns the malloced new
630
string. some sane checks could/should be added */
631
static const char *combinepath(const char *first, const char *second){
632
size_t f_len = strlen(first);
633
size_t s_len = strlen(second);
634
char *tmp = malloc(f_len + s_len + 2);
635
if (tmp == NULL){
636
return NULL;
637
}
638
if(f_len > 0){
639
memcpy(tmp, first, f_len);
640
}
641
tmp[f_len] = '/';
642
if(s_len > 0){
643
memcpy(tmp + f_len + 1, second, s_len);
644
}
645
tmp[f_len + 1 + s_len] = '\0';
646
return tmp;
647
}
648
649
650
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
651
AvahiServerConfig config;
812
int main(int argc, char *argv[]){
652
813
AvahiSServiceBrowser *sb = NULL;
653
814
int error;
654
815
int ret;
655
int returncode = EXIT_SUCCESS;
816
int exitcode = EXIT_SUCCESS;
656
817
const char *interface = "eth0";
657
818
struct ifreq network;
658
819
int sd;
820
uid_t uid;
821
gid_t gid;
659
822
char *connect_to = NULL;
823
char tempdir[] = "/tmp/mandosXXXXXX";
660
824
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
825
const char *seckey = PATHDIR "/" SECKEY;
826
const char *pubkey = PATHDIR "/" PUBKEY;
827
661
828
mandos_context mc = { .simple_poll = NULL, .server = NULL,
662
.dh_bits = 2048, .priority = "SECURE256"};
829
.dh_bits = 1024, .priority = "SECURE256"
830
":!CTYPE-X.509:+CTYPE-OPENPGP" };
831
bool gnutls_initalized = false;
832
bool gpgme_initalized = false;
663
833
664
while (true){
665
static struct option long_options[] = {
666
{"debug", no_argument, (int *)&debug, 1},
667
{"connect", required_argument, 0, 'C'},
668
{"interface", required_argument, 0, 'i'},
669
{"certdir", required_argument, 0, 'd'},
670
{"certkey", required_argument, 0, 'c'},
671
{"certfile", required_argument, 0, 'k'},
672
{"dh_bits", required_argument, 0, 'D'},
673
{"priority", required_argument, 0, 'p'},
674
{0, 0, 0, 0} };
675
676
int option_index = 0;
677
ret = getopt_long (argc, argv, "i:", long_options,
678
&option_index);
679
680
if (ret == -1){
681
break;
682
}
683
684
switch(ret){
685
case 0:
686
break;
687
case 'i':
688
interface = optarg;
689
break;
690
case 'C':
691
connect_to = optarg;
692
break;
693
case 'd':
694
certdir = optarg;
695
break;
696
case 'c':
697
certfile = optarg;
698
break;
699
case 'k':
700
certkey = optarg;
701
break;
702
case 'D':
703
{
704
long int tmp;
705
errno = 0;
706
tmp = strtol(optarg, NULL, 10);
707
if (errno == ERANGE){
708
perror("strtol");
834
{
835
struct argp_option options[] = {
836
{ .name = "debug", .key = 128,
837
.doc = "Debug mode", .group = 3 },
838
{ .name = "connect", .key = 'c',
839
.arg = "ADDRESS:PORT",
840
.doc = "Connect directly to a specific Mandos server",
841
.group = 1 },
842
{ .name = "interface", .key = 'i',
843
.arg = "NAME",
844
.doc = "Interface that will be used to search for Mandos"
845
" servers",
846
.group = 1 },
847
{ .name = "seckey", .key = 's',
848
.arg = "FILE",
849
.doc = "OpenPGP secret key file base name",
850
.group = 1 },
851
{ .name = "pubkey", .key = 'p',
852
.arg = "FILE",
853
.doc = "OpenPGP public key file base name",
854
.group = 2 },
855
{ .name = "dh-bits", .key = 129,
856
.arg = "BITS",
857
.doc = "Bit length of the prime number used in the"
858
" Diffie-Hellman key exchange",
859
.group = 2 },
860
{ .name = "priority", .key = 130,
861
.arg = "STRING",
862
.doc = "GnuTLS priority string for the TLS handshake",
863
.group = 1 },
864
{ .name = NULL }
865
};
866
867
error_t parse_opt (int key, char *arg,
868
struct argp_state *state) {
869
switch (key) {
870
case 128: /* --debug */
871
debug = true;
872
break;
873
case 'c': /* --connect */
874
connect_to = arg;
875
break;
876
case 'i': /* --interface */
877
interface = arg;
878
break;
879
case 's': /* --seckey */
880
seckey = arg;
881
break;
882
case 'p': /* --pubkey */
883
pubkey = arg;
884
break;
885
case 129: /* --dh-bits */
886
ret = sscanf(arg, "%u", &mc.dh_bits);
887
if(ret == 0 or mc.dh_bits == 0){
888
fprintf(stderr, "Bad number of DH bits\n");
709
889
exit(EXIT_FAILURE);
710
890
}
711
mc.dh_bits = tmp;
712
}
713
break;
714
case 'p':
715
mc.priority = optarg;
716
break;
717
default:
718
exit(EXIT_FAILURE);
719
}
720
}
721
722
certfile = combinepath(certdir, certfile);
723
if (certfile == NULL){
724
perror("combinepath");
725
returncode = EXIT_FAILURE;
726
goto exit;
727
}
728
729
certkey = combinepath(certdir, certkey);
730
if (certkey == NULL){
731
perror("combinepath");
732
returncode = EXIT_FAILURE;
733
goto exit;
891
break;
892
case 130: /* --priority */
893
mc.priority = arg;
894
break;
895
case ARGP_KEY_ARG:
896
argp_usage (state);
897
case ARGP_KEY_END:
898
break;
899
default:
900
return ARGP_ERR_UNKNOWN;
901
}
902
return 0;
903
}
904
905
struct argp argp = { .options = options, .parser = parse_opt,
906
.args_doc = "",
907
.doc = "Mandos client -- Get and decrypt"
908
" passwords from a Mandos server" };
909
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
910
if (ret == ARGP_ERR_UNKNOWN){
911
fprintf(stderr, "Unknown error while parsing arguments\n");
912
exitcode = EXIT_FAILURE;
913
goto end;
914
}
915
}
916
917
/* If the interface is down, bring it up */
918
{
919
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
920
if(sd < 0) {
921
perror("socket");
922
exitcode = EXIT_FAILURE;
923
goto end;
924
}
925
strcpy(network.ifr_name, interface);
926
ret = ioctl(sd, SIOCGIFFLAGS, &network);
927
if(ret == -1){
928
perror("ioctl SIOCGIFFLAGS");
929
exitcode = EXIT_FAILURE;
930
goto end;
931
}
932
if((network.ifr_flags & IFF_UP) == 0){
933
network.ifr_flags |= IFF_UP;
934
ret = ioctl(sd, SIOCSIFFLAGS, &network);
935
if(ret == -1){
936
perror("ioctl SIOCSIFFLAGS");
937
exitcode = EXIT_FAILURE;
938
goto end;
939
}
940
}
941
ret = (int)TEMP_FAILURE_RETRY(close(sd));
942
if(ret == -1){
943
perror("close");
944
}
945
}
946
947
uid = getuid();
948
gid = getgid();
949
950
ret = setuid(uid);
951
if (ret == -1){
952
perror("setuid");
953
}
954
955
setgid(gid);
956
if (ret == -1){
957
perror("setgid");
958
}
959
960
ret = init_gnutls_global(&mc, pubkey, seckey);
961
if (ret == -1){
962
fprintf(stderr, "init_gnutls_global failed\n");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
} else {
966
gnutls_initalized = true;
967
}
968
969
if(mkdtemp(tempdir) == NULL){
970
perror("mkdtemp");
971
tempdir[0] = '\0';
972
goto end;
973
}
974
975
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
976
fprintf(stderr, "gpgme_initalized failed\n");
977
exitcode = EXIT_FAILURE;
978
goto end;
979
} else {
980
gpgme_initalized = true;
734
981
}
735
982
736
983
if_index = (AvahiIfIndex) if_nametoindex(interface);
745
992
char *address = strrchr(connect_to, ':');
746
993
if(address == NULL){
747
994
fprintf(stderr, "No colon in address\n");
748
exit(EXIT_FAILURE);
995
exitcode = EXIT_FAILURE;
996
goto end;
749
997
}
750
errno = 0;
751
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
752
if(errno){
753
perror("Bad port number");
754
exit(EXIT_FAILURE);
998
uint16_t port;
999
ret = sscanf(address+1, "%" SCNu16, &port);
1000
if(ret == 0 or port == 0){
1001
fprintf(stderr, "Bad port number\n");
1002
exitcode = EXIT_FAILURE;
1003
goto end;
755
1004
}
756
1005
*address = '\0';
757
1006
address = connect_to;
758
ret = start_mandos_communication(address, port, if_index);
1007
ret = start_mandos_communication(address, port, if_index, &mc);
759
1008
if(ret < 0){
760
exit(EXIT_FAILURE);
1009
exitcode = EXIT_FAILURE;
761
1010
} else {
762
exit(EXIT_SUCCESS);
763
}
764
}
765
766
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
767
if(sd < 0) {
768
perror("socket");
769
returncode = EXIT_FAILURE;
770
goto exit;
771
}
772
strcpy(network.ifr_name, interface);
773
ret = ioctl(sd, SIOCGIFFLAGS, &network);
774
if(ret == -1){
775
776
perror("ioctl SIOCGIFFLAGS");
777
returncode = EXIT_FAILURE;
778
goto exit;
779
}
780
if((network.ifr_flags & IFF_UP) == 0){
781
network.ifr_flags |= IFF_UP;
782
ret = ioctl(sd, SIOCSIFFLAGS, &network);
783
if(ret == -1){
784
perror("ioctl SIOCSIFFLAGS");
785
returncode = EXIT_FAILURE;
786
goto exit;
787
}
788
}
789
close(sd);
1011
exitcode = EXIT_SUCCESS;
1012
}
1013
goto end;
1014
}
790
1015
791
1016
if (not debug){
792
1017
avahi_set_log_function(empty_log);
793
1018
}
794
1019
795
/* Initialize the psuedo-RNG */
1020
/* Initialize the pseudo-RNG for Avahi */
796
1021
srand((unsigned int) time(NULL));
797
798
/* Allocate main loop object */
799
if (!(mc.simple_poll = avahi_simple_poll_new())) {
800
fprintf(stderr, "Failed to create simple poll object.\n");
801
returncode = EXIT_FAILURE;
802
goto exit;
803
}
804
805
/* Do not publish any local records */
806
avahi_server_config_init(&config);
807
config.publish_hinfo = 0;
808
config.publish_addresses = 0;
809
config.publish_workstation = 0;
810
config.publish_domain = 0;
811
812
/* Allocate a new server */
813
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
814
&config, NULL, NULL, &error);
815
816
/* Free the configuration data */
817
avahi_server_config_free(&config);
818
819
/* Check if creating the server object succeeded */
820
if (!mc.server) {
821
fprintf(stderr, "Failed to create server: %s\n",
1022
1023
/* Allocate main Avahi loop object */
1024
mc.simple_poll = avahi_simple_poll_new();
1025
if (mc.simple_poll == NULL) {
1026
fprintf(stderr, "Avahi: Failed to create simple poll"
1027
" object.\n");
1028
exitcode = EXIT_FAILURE;
1029
goto end;
1030
}
1031
1032
{
1033
AvahiServerConfig config;
1034
/* Do not publish any local Zeroconf records */
1035
avahi_server_config_init(&config);
1036
config.publish_hinfo = 0;
1037
config.publish_addresses = 0;
1038
config.publish_workstation = 0;
1039
config.publish_domain = 0;
1040
1041
/* Allocate a new server */
1042
mc.server = avahi_server_new(avahi_simple_poll_get
1043
(mc.simple_poll), &config, NULL,
1044
NULL, &error);
1045
1046
/* Free the Avahi configuration data */
1047
avahi_server_config_free(&config);
1048
}
1049
1050
/* Check if creating the Avahi server object succeeded */
1051
if (mc.server == NULL) {
1052
fprintf(stderr, "Failed to create Avahi server: %s\n",
822
1053
avahi_strerror(error));
823
returncode = EXIT_FAILURE;
824
goto exit;
1054
exitcode = EXIT_FAILURE;
1055
goto end;
825
1056
}
826
1057
827
/* Create the service browser */
1058
/* Create the Avahi service browser */
828
1059
sb = avahi_s_service_browser_new(mc.server, if_index,
829
1060
AVAHI_PROTO_INET6,
830
1061
"_mandos._tcp", NULL, 0,
831
1062
browse_callback, &mc);
832
if (!sb) {
1063
if (sb == NULL) {
833
1064
fprintf(stderr, "Failed to create service browser: %s\n",
834
1065
avahi_strerror(avahi_server_errno(mc.server)));
835
returncode = EXIT_FAILURE;
836
goto exit;
1066
exitcode = EXIT_FAILURE;
1067
goto end;
837
1068
}
838
1069
839
1070
/* Run the main loop */
840
1071
841
1072
if (debug){
842
fprintf(stderr, "Starting avahi loop search\n");
1073
fprintf(stderr, "Starting Avahi loop search\n");
843
1074
}
844
1075
845
avahi_simple_poll_loop(simple_poll);
846
847
exit:
848
1076
avahi_simple_poll_loop(mc.simple_poll);
1077
1078
end:
1079
849
1080
if (debug){
850
1081
fprintf(stderr, "%s exiting\n", argv[0]);
851
1082
}
852
1083
853
1084
/* Cleanup things */
854
if (sb)
1085
if (sb != NULL)
855
1086
avahi_s_service_browser_free(sb);
856
1087
857
if (mc.server)
1088
if (mc.server != NULL)
858
1089
avahi_server_free(mc.server);
859
860
if (simple_poll)
861
avahi_simple_poll_free(simple_poll);
862
free(certfile);
863
free(certkey);
864
865
return returncode;
1090
1091
if (mc.simple_poll != NULL)
1092
avahi_simple_poll_free(mc.simple_poll);
1093
1094
if (gnutls_initalized){
1095
gnutls_certificate_free_credentials(mc.cred);
1096
gnutls_global_deinit ();
1097
gnutls_dh_params_deinit(mc.dh_params);
1098
}
1099
1100
if(gpgme_initalized){
1101
gpgme_release(mc.ctx);
1102
}
1103
1104
/* Removes the temp directory used by GPGME */
1105
if(tempdir[0] != '\0'){
1106
DIR *d;
1107
struct dirent *direntry;
1108
d = opendir(tempdir);
1109
if(d == NULL){
1110
if(errno != ENOENT){
1111
perror("opendir");
1112
}
1113
} else {
1114
while(true){
1115
direntry = readdir(d);
1116
if(direntry == NULL){
1117
break;
1118
}
1119
if (direntry->d_type == DT_REG){
1120
char *fullname = NULL;
1121
ret = asprintf(&fullname, "%s/%s", tempdir,
1122
direntry->d_name);
1123
if(ret < 0){
1124
perror("asprintf");
1125
continue;
1126
}
1127
ret = unlink(fullname);
1128
if(ret == -1){
1129
fprintf(stderr, "unlink(\"%s\"): %s",
1130
fullname, strerror(errno));
1131
}
1132
free(fullname);
1133
}
1134
}
1135
closedir(d);
1136
}
1137
ret = rmdir(tempdir);
1138
if(ret == -1 and errno != ENOENT){
1139
perror("rmdir");
1140
}
1141
}
1142
1143
return exitcode;
866
1144
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0