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- Committer: Teddy Hogeborn
- Date: 2008-08-03 16:05:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20080803160552-mvqy5klry3wn57x1
* plugins.d/mandosclient.c (initgnutls): Moved "err" variable into its
own code block.
(start_mandos_communication): Moved call to "initgnutls" to
beginning. Renamed label "exit" to
"mandos_end". Bug fix: set return
code if failure to realloc buffer.
Close TLS session as early as
possible.
(resolve_callback): Also print interface number when debugging.
(main): Moved "debug_int" and "config" into their own respective
code blocks.
own code block.
(start_mandos_communication): Moved call to "initgnutls" to
beginning. Renamed label "exit" to
"mandos_end". Bug fix: set return
code if failure to realloc buffer.
Close TLS session as early as
possible.
(resolve_callback): Also print interface number when debugging.
(main): Moved "debug_int" and "config" into their own respective
code blocks.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugins.d/mandosclient.c
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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
33
32
#define _LARGEFILE_SOURCE
34
33
#define _FILE_OFFSET_BITS 64
35
34
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
41
#include <stdint.h> /* uint16_t, uint32_t */
42
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
45
#include <stdbool.h> /* bool, true */
46
#include <string.h> /* memset(), strcmp(), strlen(),
47
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
#include <sys/stat.h> /* open() */
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
#include <fcntl.h> /* open() */
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <assert.h> /* assert() */
63
#include <errno.h> /* perror(), errno */
64
#include <time.h> /* nanosleep(), time() */
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
41
SIOCSIFFLAGS */
65
42
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
SIOCSIFFLAGS, if_indextoname(),
67
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
71
setgid() */
72
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
74
#include <argp.h> /* struct argp_option, error_t, struct
75
argp_state, struct argp,
76
argp_parse(), ARGP_KEY_ARG,
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
#ifdef __linux__
79
#include <sys/klog.h> /* klogctl() */
80
#endif
43
SIOCSIFFLAGS */
81
44
82
/* Avahi */
83
/* All Avahi types, constants and functions
84
Avahi*, avahi_*,
85
AVAHI_* */
86
45
#include <avahi-core/core.h>
87
46
#include <avahi-core/lookup.h>
88
47
#include <avahi-core/log.h>
90
49
#include <avahi-common/malloc.h>
91
50
#include <avahi-common/error.h>
92
51
93
/* GnuTLS */
94
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
95
functions:
96
gnutls_*
97
init_gnutls_session(),
98
GNUTLS_* */
99
#include <gnutls/openpgp.h>
100
/* gnutls_certificate_set_openpgp_key_file(),
101
GNUTLS_OPENPGP_FMT_BASE64 */
52
/* Mandos client part */
53
#include <sys/types.h> /* socket(), inet_pton() */
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton() */
56
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
57
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
58
59
#include <unistd.h> /* close() */
60
#include <netinet/in.h>
61
#include <stdbool.h> /* true */
62
#include <string.h> /* memset */
63
#include <arpa/inet.h> /* inet_pton() */
64
#include <iso646.h> /* not */
65
#include <net/if.h> /* IF_NAMESIZE */
102
66
103
67
/* GPGME */
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
106
gpgme_*
107
GPGME_PROTOCOL_OpenPGP,
108
GPG_ERR_NO_* */
68
#include <errno.h> /* perror() */
69
#include <gpgme.h>
70
71
/* getopt_long */
72
#include <getopt.h>
109
73
110
74
#define BUFFER_SIZE 256
111
75
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
76
static const char *keydir = "/conf/conf.d/mandos";
77
static const char *pubkeyfile = "pubkey.txt";
78
static const char *seckeyfile = "seckey.txt";
115
79
116
80
bool debug = false;
117
static const char mandos_protocol_version[] = "1";
118
const char *argp_program_version = "mandos-client " VERSION;
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
120
81
121
/* Used for passing in values through the Avahi callback functions */
82
/* Used for passing in values through all the callback functions */
122
83
typedef struct {
123
84
AvahiSimplePoll *simple_poll;
124
85
AvahiServer *server;
125
86
gnutls_certificate_credentials_t cred;
126
87
unsigned int dh_bits;
127
gnutls_dh_params_t dh_params;
128
88
const char *priority;
89
} mandos_context;
90
91
/*
92
* Decrypt OpenPGP data using keyrings in HOMEDIR.
93
* Returns -1 on error
94
*/
95
static ssize_t pgp_packet_decrypt (const char *cryptotext,
96
size_t crypto_size,
97
char **plaintext,
98
const char *homedir){
99
gpgme_data_t dh_crypto, dh_plain;
129
100
gpgme_ctx_t ctx;
130
} mandos_context;
131
132
/*
133
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
134
* "buffer_capacity" is how much is currently allocated,
135
* "buffer_length" is how much is already used.
136
*/
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
138
size_t buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
141
if(buffer == NULL){
142
return 0;
143
}
144
buffer_capacity += BUFFER_SIZE;
145
}
146
return buffer_capacity;
147
}
148
149
/*
150
* Initialize GPGME.
151
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
155
101
gpgme_error_t rc;
102
ssize_t ret;
103
size_t plaintext_capacity = 0;
104
ssize_t plaintext_length = 0;
156
105
gpgme_engine_info_t engine_info;
157
106
158
159
/*
160
* Helper function to insert pub and seckey to the engine keyring.
161
*/
162
bool import_key(const char *filename){
163
int fd;
164
gpgme_data_t pgp_data;
165
166
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
167
if(fd == -1){
168
perror("open");
169
return false;
170
}
171
172
rc = gpgme_data_new_from_fd(&pgp_data, fd);
173
if(rc != GPG_ERR_NO_ERROR){
174
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
175
gpgme_strsource(rc), gpgme_strerror(rc));
176
return false;
177
}
178
179
rc = gpgme_op_import(mc->ctx, pgp_data);
180
if(rc != GPG_ERR_NO_ERROR){
181
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
gpgme_strsource(rc), gpgme_strerror(rc));
183
return false;
184
}
185
186
ret = (int)TEMP_FAILURE_RETRY(close(fd));
187
if(ret == -1){
188
perror("close");
189
}
190
gpgme_data_release(pgp_data);
191
return true;
192
}
193
194
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
107
if (debug){
108
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
196
109
}
197
110
198
111
/* Init GPGME */
199
112
gpgme_check_version(NULL);
200
113
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
201
if(rc != GPG_ERR_NO_ERROR){
114
if (rc != GPG_ERR_NO_ERROR){
202
115
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
203
116
gpgme_strsource(rc), gpgme_strerror(rc));
204
return false;
117
return -1;
205
118
}
206
119
207
/* Set GPGME home directory for the OpenPGP engine only */
208
rc = gpgme_get_engine_info(&engine_info);
209
if(rc != GPG_ERR_NO_ERROR){
120
/* Set GPGME home directory for the OpenPGP engine only */
121
rc = gpgme_get_engine_info (&engine_info);
122
if (rc != GPG_ERR_NO_ERROR){
210
123
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
211
124
gpgme_strsource(rc), gpgme_strerror(rc));
212
return false;
125
return -1;
213
126
}
214
127
while(engine_info != NULL){
215
128
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
216
129
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
217
engine_info->file_name, tempdir);
130
engine_info->file_name, homedir);
218
131
break;
219
132
}
220
133
engine_info = engine_info->next;
221
134
}
222
135
if(engine_info == NULL){
223
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
224
return false;
225
}
226
227
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
229
if(rc != GPG_ERR_NO_ERROR){
230
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
232
return false;
233
}
234
235
if(not import_key(pubkey) or not import_key(seckey)){
236
return false;
237
}
238
239
return true;
240
}
241
242
/*
243
* Decrypt OpenPGP data.
244
* Returns -1 on error
245
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
248
size_t crypto_size,
249
char **plaintext){
250
gpgme_data_t dh_crypto, dh_plain;
251
gpgme_error_t rc;
252
ssize_t ret;
253
size_t plaintext_capacity = 0;
254
ssize_t plaintext_length = 0;
255
256
if(debug){
257
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
136
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
137
return -1;
258
138
}
259
139
260
140
/* Create new GPGME data buffer from memory cryptotext */
261
141
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
262
142
0);
263
if(rc != GPG_ERR_NO_ERROR){
143
if (rc != GPG_ERR_NO_ERROR){
264
144
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
265
145
gpgme_strsource(rc), gpgme_strerror(rc));
266
146
return -1;
268
148
269
149
/* Create new empty GPGME data buffer for the plaintext */
270
150
rc = gpgme_data_new(&dh_plain);
271
if(rc != GPG_ERR_NO_ERROR){
151
if (rc != GPG_ERR_NO_ERROR){
272
152
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
273
153
gpgme_strsource(rc), gpgme_strerror(rc));
274
154
gpgme_data_release(dh_crypto);
275
155
return -1;
276
156
}
277
157
158
/* Create new GPGME "context" */
159
rc = gpgme_new(&ctx);
160
if (rc != GPG_ERR_NO_ERROR){
161
fprintf(stderr, "bad gpgme_new: %s: %s\n",
162
gpgme_strsource(rc), gpgme_strerror(rc));
163
plaintext_length = -1;
164
goto decrypt_end;
165
}
166
278
167
/* Decrypt data from the cryptotext data buffer to the plaintext
279
168
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
169
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
170
if (rc != GPG_ERR_NO_ERROR){
282
171
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
172
gpgme_strsource(rc), gpgme_strerror(rc));
284
173
plaintext_length = -1;
285
if(debug){
286
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
288
if(result == NULL){
289
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
} else {
291
fprintf(stderr, "Unsupported algorithm: %s\n",
292
result->unsupported_algorithm);
293
fprintf(stderr, "Wrong key usage: %u\n",
294
result->wrong_key_usage);
295
if(result->file_name != NULL){
296
fprintf(stderr, "File name: %s\n", result->file_name);
297
}
298
gpgme_recipient_t recipient;
299
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
310
}
311
}
312
}
313
174
goto decrypt_end;
314
175
}
315
176
317
178
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
318
179
}
319
180
181
if (debug){
182
gpgme_decrypt_result_t result;
183
result = gpgme_op_decrypt_result(ctx);
184
if (result == NULL){
185
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
186
} else {
187
fprintf(stderr, "Unsupported algorithm: %s\n",
188
result->unsupported_algorithm);
189
fprintf(stderr, "Wrong key usage: %d\n",
190
result->wrong_key_usage);
191
if(result->file_name != NULL){
192
fprintf(stderr, "File name: %s\n", result->file_name);
193
}
194
gpgme_recipient_t recipient;
195
recipient = result->recipients;
196
if(recipient){
197
while(recipient != NULL){
198
fprintf(stderr, "Public key algorithm: %s\n",
199
gpgme_pubkey_algo_name(recipient->pubkey_algo));
200
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
201
fprintf(stderr, "Secret key available: %s\n",
202
recipient->status == GPG_ERR_NO_SECKEY
203
? "No" : "Yes");
204
recipient = recipient->next;
205
}
206
}
207
}
208
}
209
320
210
/* Seek back to the beginning of the GPGME plaintext data buffer */
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
211
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
212
perror("pgpme_data_seek");
323
213
plaintext_length = -1;
324
214
goto decrypt_end;
325
215
}
326
216
327
217
*plaintext = NULL;
328
218
while(true){
329
plaintext_capacity = adjustbuffer(plaintext,
330
(size_t)plaintext_length,
331
plaintext_capacity);
332
if(plaintext_capacity == 0){
333
perror("adjustbuffer");
219
if (plaintext_length + BUFFER_SIZE
220
> (ssize_t) plaintext_capacity){
221
*plaintext = realloc(*plaintext, plaintext_capacity
222
+ BUFFER_SIZE);
223
if (*plaintext == NULL){
224
perror("realloc");
334
225
plaintext_length = -1;
335
226
goto decrypt_end;
227
}
228
plaintext_capacity += BUFFER_SIZE;
336
229
}
337
230
338
231
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
339
232
BUFFER_SIZE);
340
233
/* Print the data, if any */
341
if(ret == 0){
234
if (ret == 0){
342
235
/* EOF */
343
236
break;
344
237
}
349
242
}
350
243
plaintext_length += ret;
351
244
}
352
245
353
246
if(debug){
354
247
fprintf(stderr, "Decrypted password is: ");
355
248
for(ssize_t i = 0; i < plaintext_length; i++){
368
261
return plaintext_length;
369
262
}
370
263
371
static const char * safer_gnutls_strerror(int value){
372
const char *ret = gnutls_strerror(value); /* Spurious warning from
373
-Wunreachable-code */
374
if(ret == NULL)
264
static const char * safer_gnutls_strerror (int value) {
265
const char *ret = gnutls_strerror (value);
266
if (ret == NULL)
375
267
ret = "(unknown)";
376
268
return ret;
377
269
}
382
274
fprintf(stderr, "GnuTLS: %s", string);
383
275
}
384
276
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
277
static int initgnutls(mandos_context *mc, gnutls_session_t *session,
278
gnutls_dh_params_t *dh_params){
388
279
int ret;
389
280
390
281
if(debug){
391
282
fprintf(stderr, "Initializing GnuTLS\n");
392
283
}
393
394
ret = gnutls_global_init();
395
if(ret != GNUTLS_E_SUCCESS){
396
fprintf(stderr, "GnuTLS global_init: %s\n",
397
safer_gnutls_strerror(ret));
284
285
if ((ret = gnutls_global_init ())
286
!= GNUTLS_E_SUCCESS) {
287
fprintf (stderr, "GnuTLS global_init: %s\n",
288
safer_gnutls_strerror(ret));
398
289
return -1;
399
290
}
400
291
401
if(debug){
292
if (debug){
402
293
/* "Use a log level over 10 to enable all debugging options."
403
294
* - GnuTLS manual
404
295
*/
407
298
}
408
299
409
300
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
411
if(ret != GNUTLS_E_SUCCESS){
412
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
416
safer_gnutls_strerror(ret));
417
gnutls_global_deinit();
301
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
302
!= GNUTLS_E_SUCCESS) {
303
fprintf (stderr, "GnuTLS memory error: %s\n",
304
safer_gnutls_strerror(ret));
418
305
return -1;
419
306
}
420
307
421
308
if(debug){
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
309
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
310
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
311
seckeyfile);
425
312
}
426
313
427
314
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
315
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
316
if (ret != GNUTLS_E_SUCCESS) {
431
317
fprintf(stderr,
432
318
"Error[%d] while reading the OpenPGP key pair ('%s',"
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
319
" '%s')\n", ret, pubkeyfile, seckeyfile);
320
fprintf(stdout, "The GnuTLS error is: %s\n",
435
321
safer_gnutls_strerror(ret));
436
goto globalfail;
322
return -1;
437
323
}
438
324
439
325
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
441
if(ret != GNUTLS_E_SUCCESS){
442
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
" %s\n", safer_gnutls_strerror(ret));
444
goto globalfail;
445
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
450
goto globalfail;
451
}
452
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
454
455
return 0;
456
457
globalfail:
458
459
gnutls_certificate_free_credentials(mc->cred);
460
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
462
return -1;
463
}
464
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
467
int ret;
326
ret = gnutls_dh_params_init(dh_params);
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
329
" %s\n", safer_gnutls_strerror(ret));
330
return -1;
331
}
332
ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits);
333
if (ret != GNUTLS_E_SUCCESS) {
334
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
335
safer_gnutls_strerror(ret));
336
return -1;
337
}
338
339
gnutls_certificate_set_dh_params(mc->cred, *dh_params);
340
468
341
/* GnuTLS session creation */
469
342
ret = gnutls_init(session, GNUTLS_SERVER);
470
if(ret != GNUTLS_E_SUCCESS){
343
if (ret != GNUTLS_E_SUCCESS){
471
344
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
472
345
safer_gnutls_strerror(ret));
473
346
}
475
348
{
476
349
const char *err;
477
350
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
478
if(ret != GNUTLS_E_SUCCESS){
351
if (ret != GNUTLS_E_SUCCESS) {
479
352
fprintf(stderr, "Syntax error at: %s\n", err);
480
353
fprintf(stderr, "GnuTLS error: %s\n",
481
354
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
483
355
return -1;
484
356
}
485
357
}
486
358
487
359
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
360
mc->cred);
489
if(ret != GNUTLS_E_SUCCESS){
361
if (ret != GNUTLS_E_SUCCESS) {
490
362
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
363
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
493
364
return -1;
494
365
}
495
366
496
367
/* ignore client certificate if any. */
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
368
gnutls_certificate_server_set_request (*session,
369
GNUTLS_CERT_IGNORE);
499
370
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
371
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
501
372
502
373
return 0;
503
374
}
511
382
AvahiIfIndex if_index,
512
383
mandos_context *mc){
513
384
int ret, tcp_sd;
514
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
385
struct sockaddr_in6 to;
516
386
char *buffer = NULL;
517
387
char *decrypted_buffer;
518
388
size_t buffer_length = 0;
519
389
size_t buffer_capacity = 0;
520
390
ssize_t decrypted_buffer_size;
521
size_t written;
391
size_t written = 0;
522
392
int retval = 0;
523
393
char interface[IF_NAMESIZE];
524
394
gnutls_session_t session;
395
gnutls_dh_params_t dh_params;
525
396
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
397
ret = initgnutls (mc, &session, &dh_params);
398
if (ret != 0){
528
399
return -1;
529
400
}
530
401
531
402
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
403
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
404
ip, port);
534
405
}
535
406
536
407
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
537
if(tcp_sd < 0){
408
if(tcp_sd < 0) {
538
409
perror("socket");
539
410
return -1;
540
411
}
541
412
542
413
if(debug){
543
414
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
415
perror("if_indextoname");
547
418
fprintf(stderr, "Binding to interface %s\n", interface);
548
419
}
549
420
550
memset(&to, 0, sizeof(to));
551
to.in6.sin6_family = AF_INET6;
421
memset(&to,0,sizeof(to)); /* Spurious warning */
422
to.sin6_family = AF_INET6;
552
423
/* It would be nice to have a way to detect if we were passed an
553
424
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
555
if(ret < 0 ){
425
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
426
if (ret < 0 ){
556
427
perror("inet_pton");
557
428
return -1;
558
429
}
560
431
fprintf(stderr, "Bad address: %s\n", ip);
561
432
return -1;
562
433
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
434
to.sin6_port = htons(port); /* Spurious warning */
566
435
567
to.in6.sin6_scope_id = (uint32_t)if_index;
436
to.sin6_scope_id = (uint32_t)if_index;
568
437
569
438
if(debug){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
439
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
572
440
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
441
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
574
442
sizeof(addrstr)) == NULL){
575
443
perror("inet_ntop");
576
444
} else {
580
448
}
581
449
}
582
450
583
ret = connect(tcp_sd, &to.in, sizeof(to));
584
if(ret < 0){
451
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
452
if (ret < 0){
585
453
perror("connect");
586
454
return -1;
587
455
}
588
456
589
const char *out = mandos_protocol_version;
590
written = 0;
591
while(true){
592
size_t out_size = strlen(out);
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
594
out_size - written));
595
if(ret == -1){
596
perror("write");
597
retval = -1;
598
goto mandos_end;
599
}
600
written += (size_t)ret;
601
if(written < out_size){
602
continue;
603
} else {
604
if(out == mandos_protocol_version){
605
written = 0;
606
out = "\r\n";
607
} else {
608
break;
609
}
610
}
611
}
612
613
457
if(debug){
614
458
fprintf(stderr, "Establishing TLS session with %s\n", ip);
615
459
}
616
460
617
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
618
619
do{
620
ret = gnutls_handshake(session);
621
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
622
623
if(ret != GNUTLS_E_SUCCESS){
461
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
462
463
ret = gnutls_handshake (session);
464
465
if (ret != GNUTLS_E_SUCCESS){
624
466
if(debug){
625
467
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
626
gnutls_perror(ret);
468
gnutls_perror (ret);
627
469
}
628
470
retval = -1;
629
471
goto mandos_end;
635
477
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
636
478
ip);
637
479
}
638
480
639
481
while(true){
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
641
buffer_capacity);
642
if(buffer_capacity == 0){
643
perror("adjustbuffer");
644
retval = -1;
645
goto mandos_end;
482
if (buffer_length + BUFFER_SIZE > buffer_capacity){
483
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
484
if (buffer == NULL){
485
perror("realloc");
486
retval = -1;
487
goto mandos_end;
488
}
489
buffer_capacity += BUFFER_SIZE;
646
490
}
647
491
648
sret = gnutls_record_recv(session, buffer+buffer_length,
649
BUFFER_SIZE);
650
if(sret == 0){
492
ret = gnutls_record_recv(session, buffer+buffer_length,
493
BUFFER_SIZE);
494
if (ret == 0){
651
495
break;
652
496
}
653
if(sret < 0){
654
switch(sret){
497
if (ret < 0){
498
switch(ret){
655
499
case GNUTLS_E_INTERRUPTED:
656
500
case GNUTLS_E_AGAIN:
657
501
break;
658
502
case GNUTLS_E_REHANDSHAKE:
659
do{
660
ret = gnutls_handshake(session);
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
503
ret = gnutls_handshake (session);
504
if (ret < 0){
663
505
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
664
gnutls_perror(ret);
506
gnutls_perror (ret);
665
507
retval = -1;
666
508
goto mandos_end;
667
509
}
670
512
fprintf(stderr, "Unknown error while reading data from"
671
513
" encrypted session with Mandos server\n");
672
514
retval = -1;
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
515
gnutls_bye (session, GNUTLS_SHUT_RDWR);
674
516
goto mandos_end;
675
517
}
676
518
} else {
677
buffer_length += (size_t) sret;
519
buffer_length += (size_t) ret;
678
520
}
679
521
}
680
522
682
524
fprintf(stderr, "Closing TLS session\n");
683
525
}
684
526
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
527
gnutls_bye (session, GNUTLS_SHUT_RDWR);
686
528
687
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
529
if (buffer_length > 0){
530
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
531
buffer_length,
690
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
692
written = 0;
532
&decrypted_buffer,
533
keydir);
534
if (decrypted_buffer_size >= 0){
693
535
while(written < (size_t) decrypted_buffer_size){
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
536
ret = (int)fwrite (decrypted_buffer + written, 1,
537
(size_t)decrypted_buffer_size - written,
538
stdout);
697
539
if(ret == 0 and ferror(stdout)){
698
540
if(debug){
699
541
fprintf(stderr, "Error writing encrypted data: %s\n",
708
550
} else {
709
551
retval = -1;
710
552
}
711
} else {
712
retval = -1;
713
553
}
714
554
715
555
/* Shutdown procedure */
716
556
717
557
mandos_end:
718
558
free(buffer);
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
722
}
723
gnutls_deinit(session);
559
close(tcp_sd);
560
gnutls_deinit (session);
561
gnutls_certificate_free_credentials (mc->cred);
562
gnutls_global_deinit ();
724
563
return retval;
725
564
}
726
565
737
576
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
577
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
578
flags,
740
void* userdata){
579
void* userdata) {
741
580
mandos_context *mc = userdata;
742
assert(r);
581
assert(r); /* Spurious warning */
743
582
744
583
/* Called whenever a service has been resolved successfully or
745
584
timed out */
746
585
747
switch(event){
586
switch (event) {
748
587
default:
749
588
case AVAHI_RESOLVER_FAILURE:
750
589
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
757
596
char ip[AVAHI_ADDRESS_STR_MAX];
758
597
avahi_address_snprint(ip, sizeof(ip), address);
759
598
if(debug){
760
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
761
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
ip, (intmax_t)interface, port);
599
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
600
" port %d\n", name, host_name, ip, interface, port);
763
601
}
764
602
int ret = start_mandos_communication(ip, port, interface, mc);
765
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
603
if (ret == 0){
604
exit(EXIT_SUCCESS);
767
605
}
768
606
}
769
607
}
770
608
avahi_s_service_resolver_free(r);
771
609
}
772
610
773
static void browse_callback(AvahiSServiceBrowser *b,
774
AvahiIfIndex interface,
775
AvahiProtocol protocol,
776
AvahiBrowserEvent event,
777
const char *name,
778
const char *type,
779
const char *domain,
780
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
flags,
782
void* userdata){
611
static void browse_callback( AvahiSServiceBrowser *b,
612
AvahiIfIndex interface,
613
AvahiProtocol protocol,
614
AvahiBrowserEvent event,
615
const char *name,
616
const char *type,
617
const char *domain,
618
AVAHI_GCC_UNUSED AvahiLookupResultFlags
619
flags,
620
void* userdata) {
783
621
mandos_context *mc = userdata;
784
assert(b);
622
assert(b); /* Spurious warning */
785
623
786
624
/* Called whenever a new services becomes available on the LAN or
787
625
is removed from the LAN */
788
626
789
switch(event){
627
switch (event) {
790
628
default:
791
629
case AVAHI_BROWSER_FAILURE:
792
630
801
639
the callback function is called the Avahi server will free the
802
640
resolver for us. */
803
641
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
642
if (!(avahi_s_service_resolver_new(mc->server, interface,
805
643
protocol, name, type, domain,
806
644
AVAHI_PROTO_INET6, 0,
807
645
resolve_callback, mc)))
821
659
}
822
660
}
823
661
662
/* Combines file name and path and returns the malloced new
663
string. some sane checks could/should be added */
664
static const char *combinepath(const char *first, const char *second){
665
size_t f_len = strlen(first);
666
size_t s_len = strlen(second);
667
char *tmp = malloc(f_len + s_len + 2);
668
if (tmp == NULL){
669
return NULL;
670
}
671
if(f_len > 0){
672
memcpy(tmp, first, f_len); /* Spurious warning */
673
}
674
tmp[f_len] = '/';
675
if(s_len > 0){
676
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
677
}
678
tmp[f_len + 1 + s_len] = '\0';
679
return tmp;
680
}
681
682
824
683
int main(int argc, char *argv[]){
825
AvahiSServiceBrowser *sb = NULL;
826
int error;
827
int ret;
828
intmax_t tmpmax;
829
int numchars;
830
int exitcode = EXIT_SUCCESS;
831
const char *interface = "eth0";
832
struct ifreq network;
833
int sd;
834
uid_t uid;
835
gid_t gid;
836
char *connect_to = NULL;
837
char tempdir[] = "/tmp/mandosXXXXXX";
838
bool tempdir_created = false;
839
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
840
const char *seckey = PATHDIR "/" SECKEY;
841
const char *pubkey = PATHDIR "/" PUBKEY;
842
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
bool gnutls_initialized = false;
847
bool gpgme_initialized = false;
848
double delay = 2.5;
849
850
{
851
struct argp_option options[] = {
852
{ .name = "debug", .key = 128,
853
.doc = "Debug mode", .group = 3 },
854
{ .name = "connect", .key = 'c',
855
.arg = "ADDRESS:PORT",
856
.doc = "Connect directly to a specific Mandos server",
857
.group = 1 },
858
{ .name = "interface", .key = 'i',
859
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
862
.group = 1 },
863
{ .name = "seckey", .key = 's',
864
.arg = "FILE",
865
.doc = "OpenPGP secret key file base name",
866
.group = 1 },
867
{ .name = "pubkey", .key = 'p',
868
.arg = "FILE",
869
.doc = "OpenPGP public key file base name",
870
.group = 2 },
871
{ .name = "dh-bits", .key = 129,
872
.arg = "BITS",
873
.doc = "Bit length of the prime number used in the"
874
" Diffie-Hellman key exchange",
875
.group = 2 },
876
{ .name = "priority", .key = 130,
877
.arg = "STRING",
878
.doc = "GnuTLS priority string for the TLS handshake",
879
.group = 1 },
880
{ .name = "delay", .key = 131,
881
.arg = "SECONDS",
882
.doc = "Maximum delay to wait for interface startup",
883
.group = 2 },
884
{ .name = NULL }
885
};
886
887
error_t parse_opt(int key, char *arg,
888
struct argp_state *state){
889
switch(key){
890
case 128: /* --debug */
891
debug = true;
892
break;
893
case 'c': /* --connect */
894
connect_to = arg;
895
break;
896
case 'i': /* --interface */
897
interface = arg;
898
break;
899
case 's': /* --seckey */
900
seckey = arg;
901
break;
902
case 'p': /* --pubkey */
903
pubkey = arg;
904
break;
905
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
909
fprintf(stderr, "Bad number of DH bits\n");
910
exit(EXIT_FAILURE);
911
}
912
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
913
break;
914
case 130: /* --priority */
915
mc.priority = arg;
916
break;
917
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
920
fprintf(stderr, "Bad delay\n");
921
exit(EXIT_FAILURE);
922
}
923
break;
924
case ARGP_KEY_ARG:
925
argp_usage(state);
926
case ARGP_KEY_END:
927
break;
928
default:
929
return ARGP_ERR_UNKNOWN;
930
}
931
return 0;
932
}
933
934
struct argp argp = { .options = options, .parser = parse_opt,
935
.args_doc = "",
936
.doc = "Mandos client -- Get and decrypt"
937
" passwords from a Mandos server" };
938
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
939
if(ret == ARGP_ERR_UNKNOWN){
940
fprintf(stderr, "Unknown error while parsing arguments\n");
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
}
945
946
/* If the interface is down, bring it up */
947
{
948
#ifdef __linux__
949
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
messages to mess up the prompt */
951
ret = klogctl(8, NULL, 5);
952
if(ret == -1){
953
perror("klogctl");
954
}
955
#endif
956
957
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
if(sd < 0){
959
perror("socket");
960
exitcode = EXIT_FAILURE;
961
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
965
}
966
#endif
967
goto end;
968
}
969
strcpy(network.ifr_name, interface);
970
ret = ioctl(sd, SIOCGIFFLAGS, &network);
971
if(ret == -1){
972
perror("ioctl SIOCGIFFLAGS");
973
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
977
}
978
#endif
979
exitcode = EXIT_FAILURE;
980
goto end;
981
}
982
if((network.ifr_flags & IFF_UP) == 0){
983
network.ifr_flags |= IFF_UP;
984
ret = ioctl(sd, SIOCSIFFLAGS, &network);
985
if(ret == -1){
986
perror("ioctl SIOCSIFFLAGS");
684
AvahiSServiceBrowser *sb = NULL;
685
int error;
686
int ret;
687
int exitcode = EXIT_SUCCESS;
688
const char *interface = "eth0";
689
struct ifreq network;
690
int sd;
691
char *connect_to = NULL;
692
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
693
mandos_context mc = { .simple_poll = NULL, .server = NULL,
694
.dh_bits = 1024, .priority = "SECURE256"};
695
696
{
697
/* Temporary int to get the address of for getopt_long */
698
int debug_int = debug ? 1 : 0;
699
while (true){
700
struct option long_options[] = {
701
{"debug", no_argument, &debug_int, 1},
702
{"connect", required_argument, NULL, 'c'},
703
{"interface", required_argument, NULL, 'i'},
704
{"keydir", required_argument, NULL, 'd'},
705
{"seckey", required_argument, NULL, 's'},
706
{"pubkey", required_argument, NULL, 'p'},
707
{"dh-bits", required_argument, NULL, 'D'},
708
{"priority", required_argument, NULL, 'P'},
709
{0, 0, 0, 0} };
710
711
int option_index = 0;
712
ret = getopt_long (argc, argv, "i:", long_options,
713
&option_index);
714
715
if (ret == -1){
716
break;
717
}
718
719
switch(ret){
720
case 0:
721
break;
722
case 'i':
723
interface = optarg;
724
break;
725
case 'c':
726
connect_to = optarg;
727
break;
728
case 'd':
729
keydir = optarg;
730
break;
731
case 'p':
732
pubkeyfile = optarg;
733
break;
734
case 's':
735
seckeyfile = optarg;
736
break;
737
case 'D':
738
errno = 0;
739
mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);
740
if (errno){
741
perror("strtol");
742
exit(EXIT_FAILURE);
743
}
744
break;
745
case 'P':
746
mc.priority = optarg;
747
break;
748
case '?':
749
default:
750
/* getopt_long() has already printed a message about the
751
unrcognized option, so just exit. */
752
exit(EXIT_FAILURE);
753
}
754
}
755
/* Set the global debug flag from the temporary int */
756
debug = debug_int ? true : false;
757
}
758
759
pubkeyfile = combinepath(keydir, pubkeyfile);
760
if (pubkeyfile == NULL){
761
perror("combinepath");
762
exitcode = EXIT_FAILURE;
763
goto end;
764
}
765
766
seckeyfile = combinepath(keydir, seckeyfile);
767
if (seckeyfile == NULL){
768
perror("combinepath");
769
goto end;
770
}
771
772
if_index = (AvahiIfIndex) if_nametoindex(interface);
773
if(if_index == 0){
774
fprintf(stderr, "No such interface: \"%s\"\n", interface);
775
exit(EXIT_FAILURE);
776
}
777
778
if(connect_to != NULL){
779
/* Connect directly, do not use Zeroconf */
780
/* (Mainly meant for debugging) */
781
char *address = strrchr(connect_to, ':');
782
if(address == NULL){
783
fprintf(stderr, "No colon in address\n");
784
exit(EXIT_FAILURE);
785
}
786
errno = 0;
787
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
788
if(errno){
789
perror("Bad port number");
790
exit(EXIT_FAILURE);
791
}
792
*address = '\0';
793
address = connect_to;
794
ret = start_mandos_communication(address, port, if_index, &mc);
795
if(ret < 0){
796
exit(EXIT_FAILURE);
797
} else {
798
exit(EXIT_SUCCESS);
799
}
800
}
801
802
/* If the interface is down, bring it up */
803
{
804
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
805
if(sd < 0) {
806
perror("socket");
987
807
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
808
goto end;
995
809
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
810
strcpy(network.ifr_name, interface); /* Spurious warning */
999
811
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1000
812
if(ret == -1){
1001
813
perror("ioctl SIOCGIFFLAGS");
1002
} else if(network.ifr_flags & IFF_RUNNING){
1003
break;
1004
}
1005
struct timespec sleeptime = { .tv_nsec = 250000000 };
1006
ret = nanosleep(&sleeptime, NULL);
1007
if(ret == -1 and errno != EINTR){
1008
perror("nanosleep");
1009
}
1010
}
1011
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1012
if(ret == -1){
1013
perror("close");
1014
}
1015
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1020
}
1021
#endif
1022
}
1023
1024
uid = getuid();
1025
gid = getgid();
1026
1027
setgid(gid);
1028
if(ret == -1){
1029
perror("setgid");
1030
}
1031
1032
ret = setuid(uid);
1033
if(ret == -1){
1034
perror("setuid");
1035
}
1036
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1038
if(ret == -1){
1039
fprintf(stderr, "init_gnutls_global failed\n");
1040
exitcode = EXIT_FAILURE;
1041
goto end;
1042
} else {
1043
gnutls_initialized = true;
1044
}
1045
1046
if(mkdtemp(tempdir) == NULL){
1047
perror("mkdtemp");
1048
goto end;
1049
}
1050
tempdir_created = true;
1051
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1053
fprintf(stderr, "init_gpgme failed\n");
1054
exitcode = EXIT_FAILURE;
1055
goto end;
1056
} else {
1057
gpgme_initialized = true;
1058
}
1059
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1065
}
1066
1067
if(connect_to != NULL){
1068
/* Connect directly, do not use Zeroconf */
1069
/* (Mainly meant for debugging) */
1070
char *address = strrchr(connect_to, ':');
1071
if(address == NULL){
1072
fprintf(stderr, "No colon in address\n");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1080
fprintf(stderr, "Bad port number\n");
1081
exitcode = EXIT_FAILURE;
1082
goto end;
1083
}
1084
port = (uint16_t)tmpmax;
1085
*address = '\0';
1086
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1088
if(ret < 0){
1089
exitcode = EXIT_FAILURE;
1090
} else {
1091
exitcode = EXIT_SUCCESS;
1092
}
1093
goto end;
1094
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1111
{
1112
AvahiServerConfig config;
1113
/* Do not publish any local Zeroconf records */
1114
avahi_server_config_init(&config);
1115
config.publish_hinfo = 0;
1116
config.publish_addresses = 0;
1117
config.publish_workstation = 0;
1118
config.publish_domain = 0;
1119
1120
/* Allocate a new server */
1121
mc.server = avahi_server_new(avahi_simple_poll_get
1122
(mc.simple_poll), &config, NULL,
1123
NULL, &error);
1124
1125
/* Free the Avahi configuration data */
1126
avahi_server_config_free(&config);
1127
}
1128
1129
/* Check if creating the Avahi server object succeeded */
1130
if(mc.server == NULL){
1131
fprintf(stderr, "Failed to create Avahi server: %s\n",
1132
avahi_strerror(error));
1133
exitcode = EXIT_FAILURE;
1134
goto end;
1135
}
1136
1137
/* Create the Avahi service browser */
1138
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1141
if(sb == NULL){
1142
fprintf(stderr, "Failed to create service browser: %s\n",
1143
avahi_strerror(avahi_server_errno(mc.server)));
1144
exitcode = EXIT_FAILURE;
1145
goto end;
1146
}
1147
1148
/* Run the main loop */
1149
1150
if(debug){
1151
fprintf(stderr, "Starting Avahi loop search\n");
1152
}
1153
1154
avahi_simple_poll_loop(mc.simple_poll);
1155
814
exitcode = EXIT_FAILURE;
815
goto end;
816
}
817
if((network.ifr_flags & IFF_UP) == 0){
818
network.ifr_flags |= IFF_UP;
819
ret = ioctl(sd, SIOCSIFFLAGS, &network);
820
if(ret == -1){
821
perror("ioctl SIOCSIFFLAGS");
822
exitcode = EXIT_FAILURE;
823
goto end;
824
}
825
}
826
close(sd);
827
}
828
829
if (not debug){
830
avahi_set_log_function(empty_log);
831
}
832
833
/* Initialize the pseudo-RNG for Avahi */
834
srand((unsigned int) time(NULL));
835
836
/* Allocate main Avahi loop object */
837
mc.simple_poll = avahi_simple_poll_new();
838
if (mc.simple_poll == NULL) {
839
fprintf(stderr, "Avahi: Failed to create simple poll"
840
" object.\n");
841
exitcode = EXIT_FAILURE;
842
goto end;
843
}
844
845
{
846
AvahiServerConfig config;
847
/* Do not publish any local Zeroconf records */
848
avahi_server_config_init(&config);
849
config.publish_hinfo = 0;
850
config.publish_addresses = 0;
851
config.publish_workstation = 0;
852
config.publish_domain = 0;
853
854
/* Allocate a new server */
855
mc.server = avahi_server_new(avahi_simple_poll_get
856
(mc.simple_poll), &config, NULL,
857
NULL, &error);
858
859
/* Free the Avahi configuration data */
860
avahi_server_config_free(&config);
861
}
862
863
/* Check if creating the Avahi server object succeeded */
864
if (mc.server == NULL) {
865
fprintf(stderr, "Failed to create Avahi server: %s\n",
866
avahi_strerror(error));
867
exitcode = EXIT_FAILURE;
868
goto end;
869
}
870
871
/* Create the Avahi service browser */
872
sb = avahi_s_service_browser_new(mc.server, if_index,
873
AVAHI_PROTO_INET6,
874
"_mandos._tcp", NULL, 0,
875
browse_callback, &mc);
876
if (sb == NULL) {
877
fprintf(stderr, "Failed to create service browser: %s\n",
878
avahi_strerror(avahi_server_errno(mc.server)));
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
883
/* Run the main loop */
884
885
if (debug){
886
fprintf(stderr, "Starting Avahi loop search\n");
887
}
888
889
avahi_simple_poll_loop(mc.simple_poll);
890
1156
891
end:
1157
1158
if(debug){
1159
fprintf(stderr, "%s exiting\n", argv[0]);
1160
}
1161
1162
/* Cleanup things */
1163
if(sb != NULL)
1164
avahi_s_service_browser_free(sb);
1165
1166
if(mc.server != NULL)
1167
avahi_server_free(mc.server);
1168
1169
if(mc.simple_poll != NULL)
1170
avahi_simple_poll_free(mc.simple_poll);
1171
1172
if(gnutls_initialized){
1173
gnutls_certificate_free_credentials(mc.cred);
1174
gnutls_global_deinit();
1175
gnutls_dh_params_deinit(mc.dh_params);
1176
}
1177
1178
if(gpgme_initialized){
1179
gpgme_release(mc.ctx);
1180
}
1181
1182
/* Removes the temp directory used by GPGME */
1183
if(tempdir_created){
1184
DIR *d;
1185
struct dirent *direntry;
1186
d = opendir(tempdir);
1187
if(d == NULL){
1188
if(errno != ENOENT){
1189
perror("opendir");
1190
}
1191
} else {
1192
while(true){
1193
direntry = readdir(d);
1194
if(direntry == NULL){
1195
break;
1196
}
1197
/* Skip "." and ".." */
1198
if(direntry->d_name[0] == '.'
1199
and (direntry->d_name[1] == '\0'
1200
or (direntry->d_name[1] == '.'
1201
and direntry->d_name[2] == '\0'))){
1202
continue;
1203
}
1204
char *fullname = NULL;
1205
ret = asprintf(&fullname, "%s/%s", tempdir,
1206
direntry->d_name);
1207
if(ret < 0){
1208
perror("asprintf");
1209
continue;
1210
}
1211
ret = remove(fullname);
1212
if(ret == -1){
1213
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1214
strerror(errno));
1215
}
1216
free(fullname);
1217
}
1218
closedir(d);
1219
}
1220
ret = rmdir(tempdir);
1221
if(ret == -1 and errno != ENOENT){
1222
perror("rmdir");
1223
}
1224
}
1225
1226
return exitcode;
892
893
if (debug){
894
fprintf(stderr, "%s exiting\n", argv[0]);
895
}
896
897
/* Cleanup things */
898
if (sb != NULL)
899
avahi_s_service_browser_free(sb);
900
901
if (mc.server != NULL)
902
avahi_server_free(mc.server);
903
904
if (mc.simple_poll != NULL)
905
avahi_simple_poll_free(mc.simple_poll);
906
free(pubkeyfile);
907
free(seckeyfile);
908
909
return exitcode;
1227
910
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0