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- Committer: Teddy Hogeborn
- Date: 2009-02-07 04:50:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090207045039-xkr6b80vtqwqrq8l
* Makefile (install-client-nokey): Move "initramfs-tools-script" from
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
"/scripts/local-top/mandos" to
"/scripts/init-premount/mandos".
(uninstall-client): - '' -
* debian/mandos-client.dirs: - '' -
* initramfs-tools-script (PREREQ): Added "udev".
- 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
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
37
37
#include <stdio.h>
38
#include <assert.h>
39
#include <stdlib.h>
40
#include <time.h>
41
#include <net/if.h> /* if_nametoindex */
42
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
43
SIOCSIFFLAGS */
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() */
44
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
45
SIOCSIFFLAGS */
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
46
81
82
/* Avahi */
83
/* All Avahi types, constants and functions
84
Avahi*, avahi_*,
85
AVAHI_* */
47
86
#include <avahi-core/core.h>
48
87
#include <avahi-core/lookup.h>
49
88
#include <avahi-core/log.h>
51
90
#include <avahi-common/malloc.h>
52
91
#include <avahi-common/error.h>
53
92
54
/* Mandos client part */
55
#include <sys/types.h> /* socket(), inet_pton() */
56
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
57
struct in6_addr, inet_pton() */
58
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
59
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
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 */
60
102
61
#include <unistd.h> /* close() */
62
#include <netinet/in.h>
63
#include <stdbool.h> /* true */
64
#include <string.h> /* memset */
65
#include <arpa/inet.h> /* inet_pton() */
66
#include <iso646.h> /* not */
67
#include <net/if.h> /* IF_NAMESIZE */
68
#include <argp.h> /* struct argp_option,
69
struct argp_state, struct argp,
70
argp_parse() */
71
103
/* GPGME */
72
#include <errno.h> /* perror() */
73
#include <gpgme.h>
104
#include <gpgme.h> /* All GPGME types, constants and
105
functions:
106
gpgme_*
107
GPGME_PROTOCOL_OpenPGP,
108
GPG_ERR_NO_* */
74
109
75
110
#define BUFFER_SIZE 256
76
111
112
#define PATHDIR "/conf/conf.d/mandos"
113
#define SECKEY "seckey.txt"
114
#define PUBKEY "pubkey.txt"
115
77
116
bool debug = false;
78
const char *keydir = "/conf/conf.d/mandos";
79
const char *argp_program_version = "mandosclient 0.9";
117
static const char mandos_protocol_version[] = "1";
118
const char *argp_program_version = "mandos-client " VERSION;
80
119
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
81
const char mandos_protocol_version[] = "1";
82
120
83
/* Used for passing in values through all the callback functions */
121
/* Used for passing in values through the Avahi callback functions */
84
122
typedef struct {
85
123
AvahiSimplePoll *simple_poll;
86
124
AvahiServer *server;
88
126
unsigned int dh_bits;
89
127
gnutls_dh_params_t dh_params;
90
128
const char *priority;
129
gpgme_ctx_t ctx;
91
130
} mandos_context;
92
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
*/
93
137
size_t adjustbuffer(char **buffer, size_t buffer_length,
94
138
size_t buffer_capacity){
95
if (buffer_length + BUFFER_SIZE > buffer_capacity){
139
if(buffer_length + BUFFER_SIZE > buffer_capacity){
96
140
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
97
if (buffer == NULL){
141
if(buffer == NULL){
98
142
return 0;
99
143
}
100
144
buffer_capacity += BUFFER_SIZE;
103
147
}
104
148
105
149
/*
106
* Decrypt OpenPGP data using keyrings in HOMEDIR.
107
* Returns -1 on error
150
* Initialize GPGME.
108
151
*/
109
static ssize_t pgp_packet_decrypt (const char *cryptotext,
110
size_t crypto_size,
111
char **plaintext,
112
const char *homedir){
113
gpgme_data_t dh_crypto, dh_plain;
114
gpgme_ctx_t ctx;
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
153
const char *pubkey, const char *tempdir){
154
int ret;
115
155
gpgme_error_t rc;
116
ssize_t ret;
117
size_t plaintext_capacity = 0;
118
ssize_t plaintext_length = 0;
119
156
gpgme_engine_info_t engine_info;
120
157
121
if (debug){
122
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
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");
123
196
}
124
197
125
198
/* Init GPGME */
126
199
gpgme_check_version(NULL);
127
200
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
128
if (rc != GPG_ERR_NO_ERROR){
201
if(rc != GPG_ERR_NO_ERROR){
129
202
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
130
203
gpgme_strsource(rc), gpgme_strerror(rc));
131
return -1;
204
return false;
132
205
}
133
206
134
/* Set GPGME home directory for the OpenPGP engine only */
135
rc = gpgme_get_engine_info (&engine_info);
136
if (rc != GPG_ERR_NO_ERROR){
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){
137
210
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
138
211
gpgme_strsource(rc), gpgme_strerror(rc));
139
return -1;
212
return false;
140
213
}
141
214
while(engine_info != NULL){
142
215
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
143
216
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
144
engine_info->file_name, homedir);
217
engine_info->file_name, tempdir);
145
218
break;
146
219
}
147
220
engine_info = engine_info->next;
148
221
}
149
222
if(engine_info == NULL){
150
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
151
return -1;
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");
152
258
}
153
259
154
260
/* Create new GPGME data buffer from memory cryptotext */
155
261
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
156
262
0);
157
if (rc != GPG_ERR_NO_ERROR){
263
if(rc != GPG_ERR_NO_ERROR){
158
264
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
159
265
gpgme_strsource(rc), gpgme_strerror(rc));
160
266
return -1;
162
268
163
269
/* Create new empty GPGME data buffer for the plaintext */
164
270
rc = gpgme_data_new(&dh_plain);
165
if (rc != GPG_ERR_NO_ERROR){
271
if(rc != GPG_ERR_NO_ERROR){
166
272
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
167
273
gpgme_strsource(rc), gpgme_strerror(rc));
168
274
gpgme_data_release(dh_crypto);
169
275
return -1;
170
276
}
171
277
172
/* Create new GPGME "context" */
173
rc = gpgme_new(&ctx);
174
if (rc != GPG_ERR_NO_ERROR){
175
fprintf(stderr, "bad gpgme_new: %s: %s\n",
176
gpgme_strsource(rc), gpgme_strerror(rc));
177
plaintext_length = -1;
178
goto decrypt_end;
179
}
180
181
278
/* Decrypt data from the cryptotext data buffer to the plaintext
182
279
data buffer */
183
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
184
if (rc != GPG_ERR_NO_ERROR){
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
281
if(rc != GPG_ERR_NO_ERROR){
185
282
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
186
283
gpgme_strsource(rc), gpgme_strerror(rc));
187
284
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
}
188
313
goto decrypt_end;
189
314
}
190
315
192
317
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
193
318
}
194
319
195
if (debug){
196
gpgme_decrypt_result_t result;
197
result = gpgme_op_decrypt_result(ctx);
198
if (result == NULL){
199
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
200
} else {
201
fprintf(stderr, "Unsupported algorithm: %s\n",
202
result->unsupported_algorithm);
203
fprintf(stderr, "Wrong key usage: %d\n",
204
result->wrong_key_usage);
205
if(result->file_name != NULL){
206
fprintf(stderr, "File name: %s\n", result->file_name);
207
}
208
gpgme_recipient_t recipient;
209
recipient = result->recipients;
210
if(recipient){
211
while(recipient != NULL){
212
fprintf(stderr, "Public key algorithm: %s\n",
213
gpgme_pubkey_algo_name(recipient->pubkey_algo));
214
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
215
fprintf(stderr, "Secret key available: %s\n",
216
recipient->status == GPG_ERR_NO_SECKEY
217
? "No" : "Yes");
218
recipient = recipient->next;
219
}
220
}
221
}
222
}
223
224
320
/* Seek back to the beginning of the GPGME plaintext data buffer */
225
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
226
perror("pgpme_data_seek");
321
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
322
perror("gpgme_data_seek");
227
323
plaintext_length = -1;
228
324
goto decrypt_end;
229
325
}
230
326
231
327
*plaintext = NULL;
232
328
while(true){
233
plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,
329
plaintext_capacity = adjustbuffer(plaintext,
330
(size_t)plaintext_length,
234
331
plaintext_capacity);
235
if (plaintext_capacity == 0){
332
if(plaintext_capacity == 0){
236
333
perror("adjustbuffer");
237
334
plaintext_length = -1;
238
335
goto decrypt_end;
241
338
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
242
339
BUFFER_SIZE);
243
340
/* Print the data, if any */
244
if (ret == 0){
341
if(ret == 0){
245
342
/* EOF */
246
343
break;
247
344
}
252
349
}
253
350
plaintext_length += ret;
254
351
}
255
352
256
353
if(debug){
257
354
fprintf(stderr, "Decrypted password is: ");
258
355
for(ssize_t i = 0; i < plaintext_length; i++){
271
368
return plaintext_length;
272
369
}
273
370
274
static const char * safer_gnutls_strerror (int value) {
275
const char *ret = gnutls_strerror (value);
276
if (ret == NULL)
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)
277
375
ret = "(unknown)";
278
376
return ret;
279
377
}
285
383
}
286
384
287
385
static int init_gnutls_global(mandos_context *mc,
288
const char *pubkeyfile,
289
const char *seckeyfile){
386
const char *pubkeyfilename,
387
const char *seckeyfilename){
290
388
int ret;
291
389
292
390
if(debug){
293
391
fprintf(stderr, "Initializing GnuTLS\n");
294
392
}
295
296
if ((ret = gnutls_global_init ())
297
!= GNUTLS_E_SUCCESS) {
298
fprintf (stderr, "GnuTLS global_init: %s\n",
299
safer_gnutls_strerror(ret));
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));
300
398
return -1;
301
399
}
302
400
303
if (debug){
401
if(debug){
304
402
/* "Use a log level over 10 to enable all debugging options."
305
403
* - GnuTLS manual
306
404
*/
309
407
}
310
408
311
409
/* OpenPGP credentials */
312
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
313
!= GNUTLS_E_SUCCESS) {
314
fprintf (stderr, "GnuTLS memory error: %s\n",
315
safer_gnutls_strerror(ret));
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();
316
418
return -1;
317
419
}
318
420
319
421
if(debug){
320
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
321
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
322
seckeyfile);
422
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
423
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
424
seckeyfilename);
323
425
}
324
426
325
427
ret = gnutls_certificate_set_openpgp_key_file
326
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
327
if (ret != GNUTLS_E_SUCCESS) {
428
(mc->cred, pubkeyfilename, seckeyfilename,
429
GNUTLS_OPENPGP_FMT_BASE64);
430
if(ret != GNUTLS_E_SUCCESS){
328
431
fprintf(stderr,
329
432
"Error[%d] while reading the OpenPGP key pair ('%s',"
330
" '%s')\n", ret, pubkeyfile, seckeyfile);
331
fprintf(stdout, "The GnuTLS error is: %s\n",
433
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
434
fprintf(stderr, "The GnuTLS error is: %s\n",
332
435
safer_gnutls_strerror(ret));
333
return -1;
436
goto globalfail;
334
437
}
335
438
336
439
/* GnuTLS server initialization */
337
440
ret = gnutls_dh_params_init(&mc->dh_params);
338
if (ret != GNUTLS_E_SUCCESS) {
339
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
340
" %s\n", safer_gnutls_strerror(ret));
341
return -1;
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;
342
445
}
343
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
344
if (ret != GNUTLS_E_SUCCESS) {
345
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
346
safer_gnutls_strerror(ret));
347
return -1;
447
if(ret != GNUTLS_E_SUCCESS){
448
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
safer_gnutls_strerror(ret));
450
goto globalfail;
348
451
}
349
452
350
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
351
454
352
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;
353
463
}
354
464
355
static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
356
467
int ret;
357
468
/* GnuTLS session creation */
358
469
ret = gnutls_init(session, GNUTLS_SERVER);
359
if (ret != GNUTLS_E_SUCCESS){
470
if(ret != GNUTLS_E_SUCCESS){
360
471
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
361
472
safer_gnutls_strerror(ret));
362
473
}
364
475
{
365
476
const char *err;
366
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
367
if (ret != GNUTLS_E_SUCCESS) {
478
if(ret != GNUTLS_E_SUCCESS){
368
479
fprintf(stderr, "Syntax error at: %s\n", err);
369
480
fprintf(stderr, "GnuTLS error: %s\n",
370
481
safer_gnutls_strerror(ret));
482
gnutls_deinit(*session);
371
483
return -1;
372
484
}
373
485
}
374
486
375
487
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
376
488
mc->cred);
377
if (ret != GNUTLS_E_SUCCESS) {
489
if(ret != GNUTLS_E_SUCCESS){
378
490
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
379
491
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
380
493
return -1;
381
494
}
382
495
383
496
/* ignore client certificate if any. */
384
gnutls_certificate_server_set_request (*session,
385
GNUTLS_CERT_IGNORE);
497
gnutls_certificate_server_set_request(*session,
498
GNUTLS_CERT_IGNORE);
386
499
387
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
388
501
389
502
return 0;
390
503
}
398
511
AvahiIfIndex if_index,
399
512
mandos_context *mc){
400
513
int ret, tcp_sd;
401
struct sockaddr_in6 to;
514
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
402
516
char *buffer = NULL;
403
517
char *decrypted_buffer;
404
518
size_t buffer_length = 0;
408
522
int retval = 0;
409
523
char interface[IF_NAMESIZE];
410
524
gnutls_session_t session;
411
gnutls_dh_params_t dh_params;
412
525
413
ret = init_gnutls_session (mc, &session);
414
if (ret != 0){
526
ret = init_gnutls_session(mc, &session);
527
if(ret != 0){
415
528
return -1;
416
529
}
417
530
418
531
if(debug){
419
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
420
ip, port);
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
533
"\n", ip, port);
421
534
}
422
535
423
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
424
if(tcp_sd < 0) {
537
if(tcp_sd < 0){
425
538
perror("socket");
426
539
return -1;
427
540
}
428
541
429
542
if(debug){
430
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
431
544
perror("if_indextoname");
434
547
fprintf(stderr, "Binding to interface %s\n", interface);
435
548
}
436
549
437
memset(&to,0,sizeof(to)); /* Spurious warning */
438
to.sin6_family = AF_INET6;
550
memset(&to, 0, sizeof(to));
551
to.in6.sin6_family = AF_INET6;
439
552
/* It would be nice to have a way to detect if we were passed an
440
553
IPv4 address here. Now we assume an IPv6 address. */
441
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
442
if (ret < 0 ){
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
555
if(ret < 0 ){
443
556
perror("inet_pton");
444
557
return -1;
445
558
}
447
560
fprintf(stderr, "Bad address: %s\n", ip);
448
561
return -1;
449
562
}
450
to.sin6_port = htons(port); /* Spurious warning */
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
564
-Wconversion and
565
-Wunreachable-code */
451
566
452
to.sin6_scope_id = (uint32_t)if_index;
567
to.in6.sin6_scope_id = (uint32_t)if_index;
453
568
454
569
if(debug){
455
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
456
572
char addrstr[INET6_ADDRSTRLEN] = "";
457
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
458
574
sizeof(addrstr)) == NULL){
459
575
perror("inet_ntop");
460
576
} else {
464
580
}
465
581
}
466
582
467
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
468
if (ret < 0){
583
ret = connect(tcp_sd, &to.in, sizeof(to));
584
if(ret < 0){
469
585
perror("connect");
470
586
return -1;
471
587
}
472
588
473
589
const char *out = mandos_protocol_version;
474
590
written = 0;
475
while (true){
591
while(true){
476
592
size_t out_size = strlen(out);
477
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
593
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
478
594
out_size - written));
479
if (ret == -1){
595
if(ret == -1){
480
596
perror("write");
481
597
retval = -1;
482
598
goto mandos_end;
485
601
if(written < out_size){
486
602
continue;
487
603
} else {
488
if (out == mandos_protocol_version){
604
if(out == mandos_protocol_version){
489
605
written = 0;
490
606
out = "\r\n";
491
607
} else {
493
609
}
494
610
}
495
611
}
496
612
497
613
if(debug){
498
614
fprintf(stderr, "Establishing TLS session with %s\n", ip);
499
615
}
500
616
501
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
502
503
ret = gnutls_handshake (session);
504
505
if (ret != GNUTLS_E_SUCCESS){
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){
506
624
if(debug){
507
625
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
508
gnutls_perror (ret);
626
gnutls_perror(ret);
509
627
}
510
628
retval = -1;
511
629
goto mandos_end;
517
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
518
636
ip);
519
637
}
520
638
521
639
while(true){
522
buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);
523
if (buffer_capacity == 0){
640
buffer_capacity = adjustbuffer(&buffer, buffer_length,
641
buffer_capacity);
642
if(buffer_capacity == 0){
524
643
perror("adjustbuffer");
525
644
retval = -1;
526
645
goto mandos_end;
527
646
}
528
647
529
ret = gnutls_record_recv(session, buffer+buffer_length,
530
BUFFER_SIZE);
531
if (ret == 0){
648
sret = gnutls_record_recv(session, buffer+buffer_length,
649
BUFFER_SIZE);
650
if(sret == 0){
532
651
break;
533
652
}
534
if (ret < 0){
535
switch(ret){
653
if(sret < 0){
654
switch(sret){
536
655
case GNUTLS_E_INTERRUPTED:
537
656
case GNUTLS_E_AGAIN:
538
657
break;
539
658
case GNUTLS_E_REHANDSHAKE:
540
ret = gnutls_handshake (session);
541
if (ret < 0){
659
do{
660
ret = gnutls_handshake(session);
661
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
662
if(ret < 0){
542
663
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
543
gnutls_perror (ret);
664
gnutls_perror(ret);
544
665
retval = -1;
545
666
goto mandos_end;
546
667
}
549
670
fprintf(stderr, "Unknown error while reading data from"
550
671
" encrypted session with Mandos server\n");
551
672
retval = -1;
552
gnutls_bye (session, GNUTLS_SHUT_RDWR);
673
gnutls_bye(session, GNUTLS_SHUT_RDWR);
553
674
goto mandos_end;
554
675
}
555
676
} else {
556
buffer_length += (size_t) ret;
677
buffer_length += (size_t) sret;
557
678
}
558
679
}
559
680
561
682
fprintf(stderr, "Closing TLS session\n");
562
683
}
563
684
564
gnutls_bye (session, GNUTLS_SHUT_RDWR);
685
gnutls_bye(session, GNUTLS_SHUT_RDWR);
565
686
566
if (buffer_length > 0){
567
decrypted_buffer_size = pgp_packet_decrypt(buffer,
687
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
568
689
buffer_length,
569
&decrypted_buffer,
570
keydir);
571
if (decrypted_buffer_size >= 0){
690
&decrypted_buffer);
691
if(decrypted_buffer_size >= 0){
572
692
written = 0;
573
693
while(written < (size_t) decrypted_buffer_size){
574
ret = (int)fwrite (decrypted_buffer + written, 1,
575
(size_t)decrypted_buffer_size - written,
576
stdout);
694
ret = (int)fwrite(decrypted_buffer + written, 1,
695
(size_t)decrypted_buffer_size - written,
696
stdout);
577
697
if(ret == 0 and ferror(stdout)){
578
698
if(debug){
579
699
fprintf(stderr, "Error writing encrypted data: %s\n",
588
708
} else {
589
709
retval = -1;
590
710
}
711
} else {
712
retval = -1;
591
713
}
592
714
593
715
/* Shutdown procedure */
594
716
595
717
mandos_end:
596
718
free(buffer);
597
close(tcp_sd);
598
gnutls_deinit (session);
599
gnutls_certificate_free_credentials (mc->cred);
600
gnutls_global_deinit ();
719
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
720
if(ret == -1){
721
perror("close");
722
}
723
gnutls_deinit(session);
601
724
return retval;
602
725
}
603
726
614
737
AVAHI_GCC_UNUSED AvahiStringList *txt,
615
738
AVAHI_GCC_UNUSED AvahiLookupResultFlags
616
739
flags,
617
void* userdata) {
740
void* userdata){
618
741
mandos_context *mc = userdata;
619
assert(r); /* Spurious warning */
742
assert(r);
620
743
621
744
/* Called whenever a service has been resolved successfully or
622
745
timed out */
623
746
624
switch (event) {
747
switch(event){
625
748
default:
626
749
case AVAHI_RESOLVER_FAILURE:
627
750
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
634
757
char ip[AVAHI_ADDRESS_STR_MAX];
635
758
avahi_address_snprint(ip, sizeof(ip), address);
636
759
if(debug){
637
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
638
" port %d\n", name, host_name, ip, interface, port);
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);
639
763
}
640
764
int ret = start_mandos_communication(ip, port, interface, mc);
641
if (ret == 0){
642
exit(EXIT_SUCCESS);
765
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
643
767
}
644
768
}
645
769
}
646
770
avahi_s_service_resolver_free(r);
647
771
}
648
772
649
static void browse_callback( AvahiSServiceBrowser *b,
650
AvahiIfIndex interface,
651
AvahiProtocol protocol,
652
AvahiBrowserEvent event,
653
const char *name,
654
const char *type,
655
const char *domain,
656
AVAHI_GCC_UNUSED AvahiLookupResultFlags
657
flags,
658
void* userdata) {
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){
659
783
mandos_context *mc = userdata;
660
assert(b); /* Spurious warning */
784
assert(b);
661
785
662
786
/* Called whenever a new services becomes available on the LAN or
663
787
is removed from the LAN */
664
788
665
switch (event) {
789
switch(event){
666
790
default:
667
791
case AVAHI_BROWSER_FAILURE:
668
792
677
801
the callback function is called the Avahi server will free the
678
802
resolver for us. */
679
803
680
if (!(avahi_s_service_resolver_new(mc->server, interface,
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
681
805
protocol, name, type, domain,
682
806
AVAHI_PROTO_INET6, 0,
683
807
resolve_callback, mc)))
697
821
}
698
822
}
699
823
700
/* Combines file name and path and returns the malloced new
701
string. some sane checks could/should be added */
702
static const char *combinepath(const char *first, const char *second){
703
size_t f_len = strlen(first);
704
size_t s_len = strlen(second);
705
char *tmp = malloc(f_len + s_len + 2);
706
if (tmp == NULL){
707
return NULL;
708
}
709
if(f_len > 0){
710
memcpy(tmp, first, f_len); /* Spurious warning */
711
}
712
tmp[f_len] = '/';
713
if(s_len > 0){
714
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
715
}
716
tmp[f_len + 1 + s_len] = '\0';
717
return tmp;
718
}
719
720
721
824
int main(int argc, char *argv[]){
722
AvahiSServiceBrowser *sb = NULL;
723
int error;
724
int ret;
725
int exitcode = EXIT_SUCCESS;
726
const char *interface = "eth0";
727
struct ifreq network;
728
int sd;
729
uid_t uid;
730
gid_t gid;
731
char *connect_to = NULL;
732
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
733
const char *pubkeyfile = "pubkey.txt";
734
const char *seckeyfile = "seckey.txt";
735
mandos_context mc = { .simple_poll = NULL, .server = NULL,
736
.dh_bits = 1024, .priority = "SECURE256"};
737
738
{
739
struct argp_option options[] = {
740
{ .name = "debug", .key = 128,
741
.doc = "Debug mode", .group = 3 },
742
{ .name = "connect", .key = 'c',
743
.arg = "IP",
744
.doc = "Connect directly to a sepcified mandos server", .group = 1 },
745
{ .name = "interface", .key = 'i',
746
.arg = "INTERFACE",
747
.doc = "Interface that Avahi will conntect through", .group = 1 },
748
{ .name = "keydir", .key = 'd',
749
.arg = "KEYDIR",
750
.doc = "Directory where the openpgp keyring is", .group = 1 },
751
{ .name = "seckey", .key = 's',
752
.arg = "SECKEY",
753
.doc = "Secret openpgp key for gnutls authentication", .group = 1 },
754
{ .name = "pubkey", .key = 'p',
755
.arg = "PUBKEY",
756
.doc = "Public openpgp key for gnutls authentication", .group = 2 },
757
{ .name = "dh-bits", .key = 129,
758
.arg = "BITS",
759
.doc = "dh-bits to use in gnutls communication", .group = 2 },
760
{ .name = "priority", .key = 130,
761
.arg = "PRIORITY",
762
.doc = "GNUTLS priority", .group = 1 },
763
{ .name = NULL }
764
};
765
766
767
error_t parse_opt (int key, char *arg, struct argp_state *state) {
768
/* Get the INPUT argument from `argp_parse', which we know is a
769
pointer to our plugin list pointer. */
770
switch (key) {
771
case 128:
772
debug = true;
773
break;
774
case 'c':
775
connect_to = arg;
776
break;
777
case 'i':
778
interface = arg;
779
break;
780
case 'd':
781
keydir = arg;
782
break;
783
case 's':
784
seckeyfile = arg;
785
break;
786
case 'p':
787
pubkeyfile = arg;
788
break;
789
case 129:
790
errno = 0;
791
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
792
if (errno){
793
perror("strtol");
794
exit(EXIT_FAILURE);
795
}
796
break;
797
case 130:
798
mc.priority = arg;
799
break;
800
case ARGP_KEY_ARG:
801
argp_usage (state);
802
break;
803
case ARGP_KEY_END:
804
break;
805
default:
806
return ARGP_ERR_UNKNOWN;
807
}
808
return 0;
809
}
810
811
struct argp argp = { .options = options, .parser = parse_opt,
812
.args_doc = "",
813
.doc = "Mandos client -- Get and decrypt passwords from mandos server" };
814
argp_parse (&argp, argc, argv, 0, 0, NULL);
815
}
816
817
pubkeyfile = combinepath(keydir, pubkeyfile);
818
if (pubkeyfile == NULL){
819
perror("combinepath");
820
exitcode = EXIT_FAILURE;
821
goto end;
822
}
823
824
seckeyfile = combinepath(keydir, seckeyfile);
825
if (seckeyfile == NULL){
826
perror("combinepath");
827
goto end;
828
}
829
830
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
831
if (ret == -1){
832
fprintf(stderr, "init_gnutls_global\n");
833
goto end;
834
}
835
836
uid = getuid();
837
gid = getgid();
838
839
ret = setuid(uid);
840
if (ret == -1){
841
perror("setuid");
842
}
843
844
setgid(gid);
845
if (ret == -1){
846
perror("setgid");
847
}
848
849
if_index = (AvahiIfIndex) if_nametoindex(interface);
850
if(if_index == 0){
851
fprintf(stderr, "No such interface: \"%s\"\n", interface);
852
exit(EXIT_FAILURE);
853
}
854
855
if(connect_to != NULL){
856
/* Connect directly, do not use Zeroconf */
857
/* (Mainly meant for debugging) */
858
char *address = strrchr(connect_to, ':');
859
if(address == NULL){
860
fprintf(stderr, "No colon in address\n");
861
exitcode = EXIT_FAILURE;
862
goto end;
863
}
864
errno = 0;
865
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
866
if(errno){
867
perror("Bad port number");
868
exitcode = EXIT_FAILURE;
869
goto end;
870
}
871
*address = '\0';
872
address = connect_to;
873
ret = start_mandos_communication(address, port, if_index, &mc);
874
if(ret < 0){
875
exitcode = EXIT_FAILURE;
876
} else {
877
exitcode = EXIT_SUCCESS;
878
}
879
goto end;
880
}
881
882
/* If the interface is down, bring it up */
883
{
884
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
885
if(sd < 0) {
886
perror("socket");
887
exitcode = EXIT_FAILURE;
888
goto end;
889
}
890
strcpy(network.ifr_name, interface); /* Spurious warning */
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");
987
exitcode = EXIT_FAILURE;
988
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
992
}
993
#endif
994
goto end;
995
}
996
}
997
/* sleep checking until interface is running */
998
for(int i=0; i < delay * 4; i++){
891
999
ret = ioctl(sd, SIOCGIFFLAGS, &network);
892
1000
if(ret == -1){
893
1001
perror("ioctl SIOCGIFFLAGS");
894
exitcode = EXIT_FAILURE;
895
goto end;
896
}
897
if((network.ifr_flags & IFF_UP) == 0){
898
network.ifr_flags |= IFF_UP;
899
ret = ioctl(sd, SIOCSIFFLAGS, &network);
900
if(ret == -1){
901
perror("ioctl SIOCSIFFLAGS");
902
exitcode = EXIT_FAILURE;
903
goto end;
904
}
905
}
906
close(sd);
907
}
908
909
if (not debug){
910
avahi_set_log_function(empty_log);
911
}
912
913
/* Initialize the pseudo-RNG for Avahi */
914
srand((unsigned int) time(NULL));
915
916
/* Allocate main Avahi loop object */
917
mc.simple_poll = avahi_simple_poll_new();
918
if (mc.simple_poll == NULL) {
919
fprintf(stderr, "Avahi: Failed to create simple poll"
920
" object.\n");
921
exitcode = EXIT_FAILURE;
922
goto end;
923
}
924
925
{
926
AvahiServerConfig config;
927
/* Do not publish any local Zeroconf records */
928
avahi_server_config_init(&config);
929
config.publish_hinfo = 0;
930
config.publish_addresses = 0;
931
config.publish_workstation = 0;
932
config.publish_domain = 0;
933
934
/* Allocate a new server */
935
mc.server = avahi_server_new(avahi_simple_poll_get
936
(mc.simple_poll), &config, NULL,
937
NULL, &error);
938
939
/* Free the Avahi configuration data */
940
avahi_server_config_free(&config);
941
}
942
943
/* Check if creating the Avahi server object succeeded */
944
if (mc.server == NULL) {
945
fprintf(stderr, "Failed to create Avahi server: %s\n",
946
avahi_strerror(error));
947
exitcode = EXIT_FAILURE;
948
goto end;
949
}
950
951
/* Create the Avahi service browser */
952
sb = avahi_s_service_browser_new(mc.server, if_index,
953
AVAHI_PROTO_INET6,
954
"_mandos._tcp", NULL, 0,
955
browse_callback, &mc);
956
if (sb == NULL) {
957
fprintf(stderr, "Failed to create service browser: %s\n",
958
avahi_strerror(avahi_server_errno(mc.server)));
959
exitcode = EXIT_FAILURE;
960
goto end;
961
}
962
963
/* Run the main loop */
964
965
if (debug){
966
fprintf(stderr, "Starting Avahi loop search\n");
967
}
968
969
avahi_simple_poll_loop(mc.simple_poll);
970
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
971
1156
end:
972
973
if (debug){
974
fprintf(stderr, "%s exiting\n", argv[0]);
975
}
976
977
/* Cleanup things */
978
if (sb != NULL)
979
avahi_s_service_browser_free(sb);
980
981
if (mc.server != NULL)
982
avahi_server_free(mc.server);
983
984
if (mc.simple_poll != NULL)
985
avahi_simple_poll_free(mc.simple_poll);
986
free(pubkeyfile);
987
free(seckeyfile);
988
989
return exitcode;
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;
990
1227
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0