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- Committer: Teddy Hogeborn
- Date: 2009-09-29 02:54:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20090929025435-jocwelhkxkfj8zj6
* mandos (DBusObjectWithProperties.Introspect): Add the name
attributes for the
return values for the
standard D-Bus
Properties methods.
attributes for the
return values for the
standard D-Bus
Properties methods.
- 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
29
30
*/
30
31
31
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
32
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
33
37
#define _FILE_OFFSET_BITS 64
34
35
#include <stdio.h>
36
#include <assert.h>
37
#include <stdlib.h>
38
#include <time.h>
39
#include <net/if.h> /* if_nametoindex */
40
38
#endif
39
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
SIOCSIFFLAGS, if_indextoname(),
69
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
78
#include <argp.h> /* struct argp_option, error_t, struct
79
argp_state, struct argp,
80
argp_parse(), ARGP_KEY_ARG,
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
90
/* Avahi */
91
/* All Avahi types, constants and functions
92
Avahi*, avahi_*,
93
AVAHI_* */
41
94
#include <avahi-core/core.h>
42
95
#include <avahi-core/lookup.h>
43
96
#include <avahi-core/log.h>
45
98
#include <avahi-common/malloc.h>
46
99
#include <avahi-common/error.h>
47
100
48
//mandos client part
49
#include <sys/types.h> /* socket(), inet_pton() */
50
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
51
struct in6_addr, inet_pton() */
52
#include <gnutls/gnutls.h> /* All GnuTLS stuff */
53
#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */
54
55
#include <unistd.h> /* close() */
56
#include <netinet/in.h>
57
#include <stdbool.h> /* true */
58
#include <string.h> /* memset */
59
#include <arpa/inet.h> /* inet_pton() */
60
#include <iso646.h> /* not */
61
62
// gpgme
63
#include <errno.h> /* perror() */
64
#include <gpgme.h>
65
66
// getopt_long
67
#include <getopt.h>
101
/* GnuTLS */
102
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
103
functions:
104
gnutls_*
105
init_gnutls_session(),
106
GNUTLS_* */
107
#include <gnutls/openpgp.h>
108
/* gnutls_certificate_set_openpgp_key_file(),
109
GNUTLS_OPENPGP_FMT_BASE64 */
110
111
/* GPGME */
112
#include <gpgme.h> /* All GPGME types, constants and
113
functions:
114
gpgme_*
115
GPGME_PROTOCOL_OpenPGP,
116
GPG_ERR_NO_* */
68
117
69
118
#define BUFFER_SIZE 256
70
119
71
static int dh_bits = 1024;
72
73
static const char *keydir = "/conf/conf.d/mandos";
74
static const char *pubkeyfile = "pubkey.txt";
75
static const char *seckeyfile = "seckey.txt";
120
#define PATHDIR "/conf/conf.d/mandos"
121
#define SECKEY "seckey.txt"
122
#define PUBKEY "pubkey.txt"
76
123
77
124
bool debug = false;
125
static const char mandos_protocol_version[] = "1";
126
const char *argp_program_version = "mandos-client " VERSION;
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
78
128
79
/* Used for */
129
/* Used for passing in values through the Avahi callback functions */
80
130
typedef struct {
81
gnutls_session_t session;
131
AvahiSimplePoll *simple_poll;
132
AvahiServer *server;
82
133
gnutls_certificate_credentials_t cred;
134
unsigned int dh_bits;
83
135
gnutls_dh_params_t dh_params;
84
} encrypted_session;
85
86
87
static ssize_t pgp_packet_decrypt (char *packet, size_t packet_size,
88
char **new_packet,
89
const char *homedir){
90
gpgme_data_t dh_crypto, dh_plain;
136
const char *priority;
91
137
gpgme_ctx_t ctx;
138
} mandos_context;
139
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
145
sig_atomic_t quit_now = 0;
146
int signal_received = 0;
147
148
/*
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
150
* bytes. "buffer_capacity" is how much is currently allocated,
151
* "buffer_length" is how much is already used.
152
*/
153
size_t incbuffer(char **buffer, size_t buffer_length,
154
size_t buffer_capacity){
155
if(buffer_length + BUFFER_SIZE > buffer_capacity){
156
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
157
if(buffer == NULL){
158
return 0;
159
}
160
buffer_capacity += BUFFER_SIZE;
161
}
162
return buffer_capacity;
163
}
164
165
/*
166
* Initialize GPGME.
167
*/
168
static bool init_gpgme(const char *seckey,
169
const char *pubkey, const char *tempdir){
92
170
gpgme_error_t rc;
93
ssize_t ret;
94
ssize_t new_packet_capacity = 0;
95
ssize_t new_packet_length = 0;
96
171
gpgme_engine_info_t engine_info;
97
98
if (debug){
99
fprintf(stderr, "Trying to decrypt OpenPGP packet\n");
172
173
174
/*
175
* Helper function to insert pub and seckey to the engine keyring.
176
*/
177
bool import_key(const char *filename){
178
int ret;
179
int fd;
180
gpgme_data_t pgp_data;
181
182
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
183
if(fd == -1){
184
perror("open");
185
return false;
186
}
187
188
rc = gpgme_data_new_from_fd(&pgp_data, fd);
189
if(rc != GPG_ERR_NO_ERROR){
190
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
191
gpgme_strsource(rc), gpgme_strerror(rc));
192
return false;
193
}
194
195
rc = gpgme_op_import(mc.ctx, pgp_data);
196
if(rc != GPG_ERR_NO_ERROR){
197
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
198
gpgme_strsource(rc), gpgme_strerror(rc));
199
return false;
200
}
201
202
ret = (int)TEMP_FAILURE_RETRY(close(fd));
203
if(ret == -1){
204
perror("close");
205
}
206
gpgme_data_release(pgp_data);
207
return true;
208
}
209
210
if(debug){
211
fprintf(stderr, "Initializing GPGME\n");
100
212
}
101
213
102
214
/* Init GPGME */
103
215
gpgme_check_version(NULL);
104
216
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
105
if (rc != GPG_ERR_NO_ERROR){
217
if(rc != GPG_ERR_NO_ERROR){
106
218
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
107
219
gpgme_strsource(rc), gpgme_strerror(rc));
108
return -1;
220
return false;
109
221
}
110
222
111
/* Set GPGME home directory */
112
rc = gpgme_get_engine_info (&engine_info);
113
if (rc != GPG_ERR_NO_ERROR){
223
/* Set GPGME home directory for the OpenPGP engine only */
224
rc = gpgme_get_engine_info(&engine_info);
225
if(rc != GPG_ERR_NO_ERROR){
114
226
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
115
227
gpgme_strsource(rc), gpgme_strerror(rc));
116
return -1;
228
return false;
117
229
}
118
230
while(engine_info != NULL){
119
231
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
120
232
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
121
engine_info->file_name, homedir);
233
engine_info->file_name, tempdir);
122
234
break;
123
235
}
124
236
engine_info = engine_info->next;
125
237
}
126
238
if(engine_info == NULL){
127
fprintf(stderr, "Could not set home dir to %s\n", homedir);
128
return -1;
129
}
130
131
/* Create new GPGME data buffer from packet buffer */
132
rc = gpgme_data_new_from_mem(&dh_crypto, packet, packet_size, 0);
133
if (rc != GPG_ERR_NO_ERROR){
239
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
240
return false;
241
}
242
243
/* Create new GPGME "context" */
244
rc = gpgme_new(&(mc.ctx));
245
if(rc != GPG_ERR_NO_ERROR){
246
fprintf(stderr, "bad gpgme_new: %s: %s\n",
247
gpgme_strsource(rc), gpgme_strerror(rc));
248
return false;
249
}
250
251
if(not import_key(pubkey) or not import_key(seckey)){
252
return false;
253
}
254
255
return true;
256
}
257
258
/*
259
* Decrypt OpenPGP data.
260
* Returns -1 on error
261
*/
262
static ssize_t pgp_packet_decrypt(const char *cryptotext,
263
size_t crypto_size,
264
char **plaintext){
265
gpgme_data_t dh_crypto, dh_plain;
266
gpgme_error_t rc;
267
ssize_t ret;
268
size_t plaintext_capacity = 0;
269
ssize_t plaintext_length = 0;
270
271
if(debug){
272
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
273
}
274
275
/* Create new GPGME data buffer from memory cryptotext */
276
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
277
0);
278
if(rc != GPG_ERR_NO_ERROR){
134
279
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
135
280
gpgme_strsource(rc), gpgme_strerror(rc));
136
281
return -1;
138
283
139
284
/* Create new empty GPGME data buffer for the plaintext */
140
285
rc = gpgme_data_new(&dh_plain);
141
if (rc != GPG_ERR_NO_ERROR){
286
if(rc != GPG_ERR_NO_ERROR){
142
287
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
143
288
gpgme_strsource(rc), gpgme_strerror(rc));
144
return -1;
145
}
146
147
/* Create new GPGME "context" */
148
rc = gpgme_new(&ctx);
149
if (rc != GPG_ERR_NO_ERROR){
150
fprintf(stderr, "bad gpgme_new: %s: %s\n",
151
gpgme_strsource(rc), gpgme_strerror(rc));
152
return -1;
153
}
154
155
/* Decrypt data from the FILE pointer to the plaintext data
156
buffer */
157
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
158
if (rc != GPG_ERR_NO_ERROR){
289
gpgme_data_release(dh_crypto);
290
return -1;
291
}
292
293
/* Decrypt data from the cryptotext data buffer to the plaintext
294
data buffer */
295
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
296
if(rc != GPG_ERR_NO_ERROR){
159
297
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
160
298
gpgme_strsource(rc), gpgme_strerror(rc));
161
return -1;
162
}
163
164
if(debug){
165
fprintf(stderr, "Decryption of OpenPGP packet succeeded\n");
166
}
167
168
if (debug){
169
gpgme_decrypt_result_t result;
170
result = gpgme_op_decrypt_result(ctx);
171
if (result == NULL){
172
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
173
} else {
174
fprintf(stderr, "Unsupported algorithm: %s\n",
175
result->unsupported_algorithm);
176
fprintf(stderr, "Wrong key usage: %d\n",
177
result->wrong_key_usage);
178
if(result->file_name != NULL){
179
fprintf(stderr, "File name: %s\n", result->file_name);
180
}
181
gpgme_recipient_t recipient;
182
recipient = result->recipients;
183
if(recipient){
299
plaintext_length = -1;
300
if(debug){
301
gpgme_decrypt_result_t result;
302
result = gpgme_op_decrypt_result(mc.ctx);
303
if(result == NULL){
304
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
305
} else {
306
fprintf(stderr, "Unsupported algorithm: %s\n",
307
result->unsupported_algorithm);
308
fprintf(stderr, "Wrong key usage: %u\n",
309
result->wrong_key_usage);
310
if(result->file_name != NULL){
311
fprintf(stderr, "File name: %s\n", result->file_name);
312
}
313
gpgme_recipient_t recipient;
314
recipient = result->recipients;
184
315
while(recipient != NULL){
185
316
fprintf(stderr, "Public key algorithm: %s\n",
186
317
gpgme_pubkey_algo_name(recipient->pubkey_algo));
192
323
}
193
324
}
194
325
}
326
goto decrypt_end;
195
327
}
196
328
197
/* Delete the GPGME FILE pointer cryptotext data buffer */
198
gpgme_data_release(dh_crypto);
329
if(debug){
330
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
331
}
199
332
200
333
/* Seek back to the beginning of the GPGME plaintext data buffer */
201
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
202
perror("pgpme_data_seek");
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
335
perror("gpgme_data_seek");
336
plaintext_length = -1;
337
goto decrypt_end;
203
338
}
204
339
205
*new_packet = 0;
340
*plaintext = NULL;
206
341
while(true){
207
if (new_packet_length + BUFFER_SIZE > new_packet_capacity){
208
*new_packet = realloc(*new_packet,
209
(unsigned int)new_packet_capacity
210
+ BUFFER_SIZE);
211
if (*new_packet == NULL){
212
perror("realloc");
213
return -1;
214
}
215
new_packet_capacity += BUFFER_SIZE;
342
plaintext_capacity = incbuffer(plaintext,
343
(size_t)plaintext_length,
344
plaintext_capacity);
345
if(plaintext_capacity == 0){
346
perror("incbuffer");
347
plaintext_length = -1;
348
goto decrypt_end;
216
349
}
217
350
218
ret = gpgme_data_read(dh_plain, *new_packet + new_packet_length,
351
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
219
352
BUFFER_SIZE);
220
353
/* Print the data, if any */
221
if (ret == 0){
354
if(ret == 0){
355
/* EOF */
222
356
break;
223
357
}
224
358
if(ret < 0){
225
359
perror("gpgme_data_read");
226
return -1;
227
}
228
new_packet_length += ret;
229
}
230
231
/* FIXME: check characters before printing to screen so to not print
232
terminal control characters */
233
/* if(debug){ */
234
/* fprintf(stderr, "decrypted password is: "); */
235
/* fwrite(*new_packet, 1, new_packet_length, stderr); */
236
/* fprintf(stderr, "\n"); */
237
/* } */
360
plaintext_length = -1;
361
goto decrypt_end;
362
}
363
plaintext_length += ret;
364
}
365
366
if(debug){
367
fprintf(stderr, "Decrypted password is: ");
368
for(ssize_t i = 0; i < plaintext_length; i++){
369
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
370
}
371
fprintf(stderr, "\n");
372
}
373
374
decrypt_end:
375
376
/* Delete the GPGME cryptotext data buffer */
377
gpgme_data_release(dh_crypto);
238
378
239
379
/* Delete the GPGME plaintext data buffer */
240
380
gpgme_data_release(dh_plain);
241
return new_packet_length;
381
return plaintext_length;
242
382
}
243
383
244
static const char * safer_gnutls_strerror (int value) {
245
const char *ret = gnutls_strerror (value);
246
if (ret == NULL)
384
static const char * safer_gnutls_strerror(int value){
385
const char *ret = gnutls_strerror(value); /* Spurious warning from
386
-Wunreachable-code */
387
if(ret == NULL)
247
388
ret = "(unknown)";
248
389
return ret;
249
390
}
250
391
392
/* GnuTLS log function callback */
251
393
static void debuggnutls(__attribute__((unused)) int level,
252
394
const char* string){
253
fprintf(stderr, "%s", string);
395
fprintf(stderr, "GnuTLS: %s", string);
254
396
}
255
397
256
static int initgnutls(encrypted_session *es){
257
const char *err;
398
static int init_gnutls_global(const char *pubkeyfilename,
399
const char *seckeyfilename){
258
400
int ret;
259
401
260
402
if(debug){
261
403
fprintf(stderr, "Initializing GnuTLS\n");
262
404
}
263
264
if ((ret = gnutls_global_init ())
265
!= GNUTLS_E_SUCCESS) {
266
fprintf (stderr, "global_init: %s\n", safer_gnutls_strerror(ret));
405
406
ret = gnutls_global_init();
407
if(ret != GNUTLS_E_SUCCESS){
408
fprintf(stderr, "GnuTLS global_init: %s\n",
409
safer_gnutls_strerror(ret));
267
410
return -1;
268
411
}
269
270
if (debug){
412
413
if(debug){
414
/* "Use a log level over 10 to enable all debugging options."
415
* - GnuTLS manual
416
*/
271
417
gnutls_global_set_log_level(11);
272
418
gnutls_global_set_log_function(debuggnutls);
273
419
}
274
420
275
/* openpgp credentials */
276
if ((ret = gnutls_certificate_allocate_credentials (&es->cred))
277
!= GNUTLS_E_SUCCESS) {
278
fprintf (stderr, "memory error: %s\n",
279
safer_gnutls_strerror(ret));
421
/* OpenPGP credentials */
422
gnutls_certificate_allocate_credentials(&mc.cred);
423
if(ret != GNUTLS_E_SUCCESS){
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
428
safer_gnutls_strerror(ret));
429
gnutls_global_deinit();
280
430
return -1;
281
431
}
282
432
283
433
if(debug){
284
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
285
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
286
seckeyfile);
434
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
435
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
436
seckeyfilename);
287
437
}
288
438
289
439
ret = gnutls_certificate_set_openpgp_key_file
290
(es->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
291
if (ret != GNUTLS_E_SUCCESS) {
292
fprintf
293
(stderr, "Error[%d] while reading the OpenPGP key pair ('%s',"
294
" '%s')\n",
295
ret, pubkeyfile, seckeyfile);
296
fprintf(stdout, "The Error is: %s\n",
297
safer_gnutls_strerror(ret));
298
return -1;
299
}
300
301
//GnuTLS server initialization
302
if ((ret = gnutls_dh_params_init (&es->dh_params))
303
!= GNUTLS_E_SUCCESS) {
304
fprintf (stderr, "Error in dh parameter initialization: %s\n",
305
safer_gnutls_strerror(ret));
306
return -1;
307
}
308
309
if ((ret = gnutls_dh_params_generate2 (es->dh_params, dh_bits))
310
!= GNUTLS_E_SUCCESS) {
311
fprintf (stderr, "Error in prime generation: %s\n",
312
safer_gnutls_strerror(ret));
313
return -1;
314
}
315
316
gnutls_certificate_set_dh_params (es->cred, es->dh_params);
317
318
// GnuTLS session creation
319
if ((ret = gnutls_init (&es->session, GNUTLS_SERVER))
320
!= GNUTLS_E_SUCCESS){
440
(mc.cred, pubkeyfilename, seckeyfilename,
441
GNUTLS_OPENPGP_FMT_BASE64);
442
if(ret != GNUTLS_E_SUCCESS){
443
fprintf(stderr,
444
"Error[%d] while reading the OpenPGP key pair ('%s',"
445
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
fprintf(stderr, "The GnuTLS error is: %s\n",
447
safer_gnutls_strerror(ret));
448
goto globalfail;
449
}
450
451
/* GnuTLS server initialization */
452
ret = gnutls_dh_params_init(&mc.dh_params);
453
if(ret != GNUTLS_E_SUCCESS){
454
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
455
" %s\n", safer_gnutls_strerror(ret));
456
goto globalfail;
457
}
458
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
459
if(ret != GNUTLS_E_SUCCESS){
460
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
461
safer_gnutls_strerror(ret));
462
goto globalfail;
463
}
464
465
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
466
467
return 0;
468
469
globalfail:
470
471
gnutls_certificate_free_credentials(mc.cred);
472
gnutls_global_deinit();
473
gnutls_dh_params_deinit(mc.dh_params);
474
return -1;
475
}
476
477
static int init_gnutls_session(gnutls_session_t *session){
478
int ret;
479
/* GnuTLS session creation */
480
do {
481
ret = gnutls_init(session, GNUTLS_SERVER);
482
if(quit_now){
483
return -1;
484
}
485
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
486
if(ret != GNUTLS_E_SUCCESS){
321
487
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
322
488
safer_gnutls_strerror(ret));
323
489
}
324
490
325
if ((ret = gnutls_priority_set_direct (es->session, "NORMAL", &err))
326
!= GNUTLS_E_SUCCESS) {
327
fprintf(stderr, "Syntax error at: %s\n", err);
328
fprintf(stderr, "GnuTLS error: %s\n",
329
safer_gnutls_strerror(ret));
330
return -1;
491
{
492
const char *err;
493
do {
494
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
495
if(quit_now){
496
gnutls_deinit(*session);
497
return -1;
498
}
499
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
500
if(ret != GNUTLS_E_SUCCESS){
501
fprintf(stderr, "Syntax error at: %s\n", err);
502
fprintf(stderr, "GnuTLS error: %s\n",
503
safer_gnutls_strerror(ret));
504
gnutls_deinit(*session);
505
return -1;
506
}
331
507
}
332
508
333
if ((ret = gnutls_credentials_set
334
(es->session, GNUTLS_CRD_CERTIFICATE, es->cred))
335
!= GNUTLS_E_SUCCESS) {
336
fprintf(stderr, "Error setting a credentials set: %s\n",
509
do {
510
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
511
mc.cred);
512
if(quit_now){
513
gnutls_deinit(*session);
514
return -1;
515
}
516
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
517
if(ret != GNUTLS_E_SUCCESS){
518
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
337
519
safer_gnutls_strerror(ret));
520
gnutls_deinit(*session);
338
521
return -1;
339
522
}
340
523
341
524
/* ignore client certificate if any. */
342
gnutls_certificate_server_set_request (es->session,
343
GNUTLS_CERT_IGNORE);
525
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
344
526
345
gnutls_dh_set_prime_bits (es->session, dh_bits);
527
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
346
528
347
529
return 0;
348
530
}
349
531
532
/* Avahi log function callback */
350
533
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
351
534
__attribute__((unused)) const char *txt){}
352
535
536
/* Called when a Mandos server is found */
353
537
static int start_mandos_communication(const char *ip, uint16_t port,
354
AvahiIfIndex if_index){
355
int ret, tcp_sd;
356
struct sockaddr_in6 to;
357
encrypted_session es;
538
AvahiIfIndex if_index,
539
int af){
540
int ret, tcp_sd = -1;
541
ssize_t sret;
542
union {
543
struct sockaddr_in in;
544
struct sockaddr_in6 in6;
545
} to;
358
546
char *buffer = NULL;
359
char *decrypted_buffer;
547
char *decrypted_buffer = NULL;
360
548
size_t buffer_length = 0;
361
549
size_t buffer_capacity = 0;
362
ssize_t decrypted_buffer_size;
363
size_t written = 0;
364
int retval = 0;
365
char interface[IF_NAMESIZE];
550
size_t written;
551
int retval = -1;
552
gnutls_session_t session;
553
int pf; /* Protocol family */
554
555
if(quit_now){
556
return -1;
557
}
558
559
switch(af){
560
case AF_INET6:
561
pf = PF_INET6;
562
break;
563
case AF_INET:
564
pf = PF_INET;
565
break;
566
default:
567
fprintf(stderr, "Bad address family: %d\n", af);
568
return -1;
569
}
570
571
ret = init_gnutls_session(&session);
572
if(ret != 0){
573
return -1;
574
}
366
575
367
576
if(debug){
368
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
369
ip, port);
577
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
578
"\n", ip, port);
370
579
}
371
580
372
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
373
if(tcp_sd < 0) {
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
if(tcp_sd < 0){
374
583
perror("socket");
375
return -1;
376
}
377
378
if(if_indextoname((unsigned int)if_index, interface) == NULL){
379
if(debug){
380
perror("if_indextoname");
381
}
382
return -1;
383
}
384
385
if(debug){
386
fprintf(stderr, "Binding to interface %s\n", interface);
387
}
388
389
memset(&to,0,sizeof(to)); /* Spurious warning */
390
to.sin6_family = AF_INET6;
391
ret = inet_pton(AF_INET6, ip, &to.sin6_addr);
392
if (ret < 0 ){
584
goto mandos_end;
585
}
586
587
if(quit_now){
588
goto mandos_end;
589
}
590
591
memset(&to, 0, sizeof(to));
592
if(af == AF_INET6){
593
to.in6.sin6_family = (sa_family_t)af;
594
ret = inet_pton(af, ip, &to.in6.sin6_addr);
595
} else { /* IPv4 */
596
to.in.sin_family = (sa_family_t)af;
597
ret = inet_pton(af, ip, &to.in.sin_addr);
598
}
599
if(ret < 0 ){
393
600
perror("inet_pton");
394
return -1;
395
}
601
goto mandos_end;
602
}
396
603
if(ret == 0){
397
604
fprintf(stderr, "Bad address: %s\n", ip);
398
return -1;
399
}
400
to.sin6_port = htons(port); /* Spurious warning */
605
goto mandos_end;
606
}
607
if(af == AF_INET6){
608
to.in6.sin6_port = htons(port); /* Spurious warnings from
609
-Wconversion and
610
-Wunreachable-code */
611
612
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
613
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
614
-Wunreachable-code*/
615
if(if_index == AVAHI_IF_UNSPEC){
616
fprintf(stderr, "An IPv6 link-local address is incomplete"
617
" without a network interface\n");
618
goto mandos_end;
619
}
620
/* Set the network interface number as scope */
621
to.in6.sin6_scope_id = (uint32_t)if_index;
622
}
623
} else {
624
to.in.sin_port = htons(port); /* Spurious warnings from
625
-Wconversion and
626
-Wunreachable-code */
627
}
401
628
402
to.sin6_scope_id = (uint32_t)if_index;
629
if(quit_now){
630
goto mandos_end;
631
}
403
632
404
633
if(debug){
405
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
406
char addrstr[INET6_ADDRSTRLEN] = "";
407
if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,
408
sizeof(addrstr)) == NULL){
634
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
635
char interface[IF_NAMESIZE];
636
if(if_indextoname((unsigned int)if_index, interface) == NULL){
637
perror("if_indextoname");
638
} else {
639
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
640
ip, interface, port);
641
}
642
} else {
643
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
644
port);
645
}
646
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
647
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
648
const char *pcret;
649
if(af == AF_INET6){
650
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
651
sizeof(addrstr));
652
} else {
653
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
654
sizeof(addrstr));
655
}
656
if(pcret == NULL){
409
657
perror("inet_ntop");
410
658
} else {
411
659
if(strcmp(addrstr, ip) != 0){
412
fprintf(stderr, "Canonical address form: %s\n",
413
addrstr, ntohs(to.sin6_port));
660
fprintf(stderr, "Canonical address form: %s\n", addrstr);
414
661
}
415
662
}
416
663
}
417
664
418
ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));
419
if (ret < 0){
665
if(quit_now){
666
goto mandos_end;
667
}
668
669
if(af == AF_INET6){
670
ret = connect(tcp_sd, &to.in6, sizeof(to));
671
} else {
672
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
673
}
674
if(ret < 0){
420
675
perror("connect");
421
return -1;
422
}
423
424
ret = initgnutls (&es);
425
if (ret != 0){
426
retval = -1;
427
return -1;
428
}
429
430
gnutls_transport_set_ptr (es.session,
431
(gnutls_transport_ptr_t) tcp_sd);
676
goto mandos_end;
677
}
678
679
if(quit_now){
680
goto mandos_end;
681
}
682
683
const char *out = mandos_protocol_version;
684
written = 0;
685
while(true){
686
size_t out_size = strlen(out);
687
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
688
out_size - written));
689
if(ret == -1){
690
perror("write");
691
goto mandos_end;
692
}
693
written += (size_t)ret;
694
if(written < out_size){
695
continue;
696
} else {
697
if(out == mandos_protocol_version){
698
written = 0;
699
out = "\r\n";
700
} else {
701
break;
702
}
703
}
704
705
if(quit_now){
706
goto mandos_end;
707
}
708
}
432
709
433
710
if(debug){
434
711
fprintf(stderr, "Establishing TLS session with %s\n", ip);
435
712
}
436
713
437
ret = gnutls_handshake (es.session);
438
439
if (ret != GNUTLS_E_SUCCESS){
714
if(quit_now){
715
goto mandos_end;
716
}
717
718
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
719
720
if(quit_now){
721
goto mandos_end;
722
}
723
724
do {
725
ret = gnutls_handshake(session);
726
if(quit_now){
727
goto mandos_end;
728
}
729
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
730
731
if(ret != GNUTLS_E_SUCCESS){
440
732
if(debug){
441
fprintf(stderr, "\n*** Handshake failed ***\n");
442
gnutls_perror (ret);
733
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
734
gnutls_perror(ret);
443
735
}
444
retval = -1;
445
goto exit;
736
goto mandos_end;
446
737
}
447
738
448
//Retrieve OpenPGP packet that contains the wanted password
739
/* Read OpenPGP packet that contains the wanted password */
449
740
450
741
if(debug){
451
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
742
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
452
743
ip);
453
744
}
454
745
455
746
while(true){
456
if (buffer_length + BUFFER_SIZE > buffer_capacity){
457
buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);
458
if (buffer == NULL){
459
perror("realloc");
460
goto exit;
461
}
462
buffer_capacity += BUFFER_SIZE;
463
}
464
465
ret = gnutls_record_recv
466
(es.session, buffer+buffer_length, BUFFER_SIZE);
467
if (ret == 0){
747
748
if(quit_now){
749
goto mandos_end;
750
}
751
752
buffer_capacity = incbuffer(&buffer, buffer_length,
753
buffer_capacity);
754
if(buffer_capacity == 0){
755
perror("incbuffer");
756
goto mandos_end;
757
}
758
759
if(quit_now){
760
goto mandos_end;
761
}
762
763
sret = gnutls_record_recv(session, buffer+buffer_length,
764
BUFFER_SIZE);
765
if(sret == 0){
468
766
break;
469
767
}
470
if (ret < 0){
471
switch(ret){
768
if(sret < 0){
769
switch(sret){
472
770
case GNUTLS_E_INTERRUPTED:
473
771
case GNUTLS_E_AGAIN:
474
772
break;
475
773
case GNUTLS_E_REHANDSHAKE:
476
ret = gnutls_handshake (es.session);
477
if (ret < 0){
478
fprintf(stderr, "\n*** Handshake failed ***\n");
479
gnutls_perror (ret);
480
retval = -1;
481
goto exit;
774
do {
775
ret = gnutls_handshake(session);
776
777
if(quit_now){
778
goto mandos_end;
779
}
780
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
781
if(ret < 0){
782
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
783
gnutls_perror(ret);
784
goto mandos_end;
482
785
}
483
786
break;
484
787
default:
485
788
fprintf(stderr, "Unknown error while reading data from"
486
" encrypted session with mandos server\n");
487
retval = -1;
488
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
489
goto exit;
789
" encrypted session with Mandos server\n");
790
gnutls_bye(session, GNUTLS_SHUT_RDWR);
791
goto mandos_end;
490
792
}
491
793
} else {
492
buffer_length += (size_t) ret;
493
}
494
}
495
496
if (buffer_length > 0){
794
buffer_length += (size_t) sret;
795
}
796
}
797
798
if(debug){
799
fprintf(stderr, "Closing TLS session\n");
800
}
801
802
if(quit_now){
803
goto mandos_end;
804
}
805
806
do {
807
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
808
if(quit_now){
809
goto mandos_end;
810
}
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
812
813
if(buffer_length > 0){
814
ssize_t decrypted_buffer_size;
497
815
decrypted_buffer_size = pgp_packet_decrypt(buffer,
498
816
buffer_length,
499
&decrypted_buffer,
500
keydir);
501
if (decrypted_buffer_size >= 0){
817
&decrypted_buffer);
818
if(decrypted_buffer_size >= 0){
819
820
written = 0;
502
821
while(written < (size_t) decrypted_buffer_size){
503
ret = (int)fwrite (decrypted_buffer + written, 1,
504
(size_t)decrypted_buffer_size - written,
505
stdout);
822
if(quit_now){
823
goto mandos_end;
824
}
825
826
ret = (int)fwrite(decrypted_buffer + written, 1,
827
(size_t)decrypted_buffer_size - written,
828
stdout);
506
829
if(ret == 0 and ferror(stdout)){
507
830
if(debug){
508
831
fprintf(stderr, "Error writing encrypted data: %s\n",
509
832
strerror(errno));
510
833
}
511
retval = -1;
512
break;
834
goto mandos_end;
513
835
}
514
836
written += (size_t)ret;
515
837
}
516
free(decrypted_buffer);
517
} else {
518
retval = -1;
838
retval = 0;
519
839
}
520
840
}
521
522
//shutdown procedure
523
524
if(debug){
525
fprintf(stderr, "Closing TLS session\n");
526
}
527
841
842
/* Shutdown procedure */
843
844
mandos_end:
845
free(decrypted_buffer);
528
846
free(buffer);
529
gnutls_bye (es.session, GNUTLS_SHUT_RDWR);
530
exit:
531
close(tcp_sd);
532
gnutls_deinit (es.session);
533
gnutls_certificate_free_credentials (es.cred);
534
gnutls_global_deinit ();
847
if(tcp_sd >= 0){
848
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
849
}
850
if(ret == -1){
851
perror("close");
852
}
853
gnutls_deinit(session);
854
if(quit_now){
855
retval = -1;
856
}
535
857
return retval;
536
858
}
537
859
538
static AvahiSimplePoll *simple_poll = NULL;
539
static AvahiServer *server = NULL;
540
541
static void resolve_callback(
542
AvahiSServiceResolver *r,
543
AvahiIfIndex interface,
544
AVAHI_GCC_UNUSED AvahiProtocol protocol,
545
AvahiResolverEvent event,
546
const char *name,
547
const char *type,
548
const char *domain,
549
const char *host_name,
550
const AvahiAddress *address,
551
uint16_t port,
552
AVAHI_GCC_UNUSED AvahiStringList *txt,
553
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
554
AVAHI_GCC_UNUSED void* userdata) {
555
556
assert(r); /* Spurious warning */
860
static void resolve_callback(AvahiSServiceResolver *r,
861
AvahiIfIndex interface,
862
AvahiProtocol proto,
863
AvahiResolverEvent event,
864
const char *name,
865
const char *type,
866
const char *domain,
867
const char *host_name,
868
const AvahiAddress *address,
869
uint16_t port,
870
AVAHI_GCC_UNUSED AvahiStringList *txt,
871
AVAHI_GCC_UNUSED AvahiLookupResultFlags
872
flags,
873
AVAHI_GCC_UNUSED void* userdata){
874
assert(r);
557
875
558
876
/* Called whenever a service has been resolved successfully or
559
877
timed out */
560
878
561
switch (event) {
879
if(quit_now){
880
return;
881
}
882
883
switch(event){
562
884
default:
563
885
case AVAHI_RESOLVER_FAILURE:
564
fprintf(stderr, "(Resolver) Failed to resolve service '%s' of"
565
" type '%s' in domain '%s': %s\n", name, type, domain,
566
avahi_strerror(avahi_server_errno(server)));
886
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
887
" of type '%s' in domain '%s': %s\n", name, type, domain,
888
avahi_strerror(avahi_server_errno(mc.server)));
567
889
break;
568
890
569
891
case AVAHI_RESOLVER_FOUND:
571
893
char ip[AVAHI_ADDRESS_STR_MAX];
572
894
avahi_address_snprint(ip, sizeof(ip), address);
573
895
if(debug){
574
fprintf(stderr, "Mandos server \"%s\" found on %s (%s) on"
575
" port %d\n", name, host_name, ip, port);
896
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
897
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
898
ip, (intmax_t)interface, port);
576
899
}
577
int ret = start_mandos_communication(ip, port, interface);
578
if (ret == 0){
579
exit(EXIT_SUCCESS);
900
int ret = start_mandos_communication(ip, port, interface,
901
avahi_proto_to_af(proto));
902
if(ret == 0){
903
avahi_simple_poll_quit(mc.simple_poll);
580
904
}
581
905
}
582
906
}
583
907
avahi_s_service_resolver_free(r);
584
908
}
585
909
586
static void browse_callback(
587
AvahiSServiceBrowser *b,
588
AvahiIfIndex interface,
589
AvahiProtocol protocol,
590
AvahiBrowserEvent event,
591
const char *name,
592
const char *type,
593
const char *domain,
594
AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
595
void* userdata) {
596
597
AvahiServer *s = userdata;
598
assert(b); /* Spurious warning */
599
600
/* Called whenever a new services becomes available on the LAN or
601
is removed from the LAN */
602
603
switch (event) {
604
default:
605
case AVAHI_BROWSER_FAILURE:
606
607
fprintf(stderr, "(Browser) %s\n",
608
avahi_strerror(avahi_server_errno(server)));
609
avahi_simple_poll_quit(simple_poll);
610
return;
611
612
case AVAHI_BROWSER_NEW:
613
/* We ignore the returned resolver object. In the callback
614
function we free it. If the server is terminated before
615
the callback function is called the server will free
616
the resolver for us. */
617
618
if (!(avahi_s_service_resolver_new(s, interface, protocol, name,
619
type, domain,
620
AVAHI_PROTO_INET6, 0,
621
resolve_callback, s)))
622
fprintf(stderr, "Failed to resolve service '%s': %s\n", name,
623
avahi_strerror(avahi_server_errno(s)));
624
break;
625
626
case AVAHI_BROWSER_REMOVE:
627
break;
628
629
case AVAHI_BROWSER_ALL_FOR_NOW:
630
case AVAHI_BROWSER_CACHE_EXHAUSTED:
631
break;
632
}
633
}
634
635
/* Combines file name and path and returns the malloced new
636
string. some sane checks could/should be added */
637
static const char *combinepath(const char *first, const char *second){
638
size_t f_len = strlen(first);
639
size_t s_len = strlen(second);
640
char *tmp = malloc(f_len + s_len + 2);
641
if (tmp == NULL){
642
return NULL;
643
}
644
if(f_len > 0){
645
memcpy(tmp, first, f_len);
646
}
647
tmp[f_len] = '/';
648
if(s_len > 0){
649
memcpy(tmp + f_len + 1, second, s_len);
650
}
651
tmp[f_len + 1 + s_len] = '\0';
652
return tmp;
653
}
654
655
656
int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
910
static void browse_callback(AvahiSServiceBrowser *b,
911
AvahiIfIndex interface,
912
AvahiProtocol protocol,
913
AvahiBrowserEvent event,
914
const char *name,
915
const char *type,
916
const char *domain,
917
AVAHI_GCC_UNUSED AvahiLookupResultFlags
918
flags,
919
AVAHI_GCC_UNUSED void* userdata){
920
assert(b);
921
922
/* Called whenever a new services becomes available on the LAN or
923
is removed from the LAN */
924
925
if(quit_now){
926
return;
927
}
928
929
switch(event){
930
default:
931
case AVAHI_BROWSER_FAILURE:
932
933
fprintf(stderr, "(Avahi browser) %s\n",
934
avahi_strerror(avahi_server_errno(mc.server)));
935
avahi_simple_poll_quit(mc.simple_poll);
936
return;
937
938
case AVAHI_BROWSER_NEW:
939
/* We ignore the returned Avahi resolver object. In the callback
940
function we free it. If the Avahi server is terminated before
941
the callback function is called the Avahi server will free the
942
resolver for us. */
943
944
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
945
name, type, domain, protocol, 0,
946
resolve_callback, NULL) == NULL)
947
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
948
name, avahi_strerror(avahi_server_errno(mc.server)));
949
break;
950
951
case AVAHI_BROWSER_REMOVE:
952
break;
953
954
case AVAHI_BROWSER_ALL_FOR_NOW:
955
case AVAHI_BROWSER_CACHE_EXHAUSTED:
956
if(debug){
957
fprintf(stderr, "No Mandos server found, still searching...\n");
958
}
959
break;
960
}
961
}
962
963
/* stop main loop after sigterm has been called */
964
static void handle_sigterm(int sig){
965
if(quit_now){
966
return;
967
}
968
quit_now = 1;
969
signal_received = sig;
970
int old_errno = errno;
971
if(mc.simple_poll != NULL){
972
avahi_simple_poll_quit(mc.simple_poll);
973
}
974
errno = old_errno;
975
}
976
977
int main(int argc, char *argv[]){
978
AvahiSServiceBrowser *sb = NULL;
979
int error;
980
int ret;
981
intmax_t tmpmax;
982
char *tmp;
983
int exitcode = EXIT_SUCCESS;
984
const char *interface = "eth0";
985
struct ifreq network;
986
int sd = -1;
987
bool take_down_interface = false;
988
uid_t uid;
989
gid_t gid;
990
char *connect_to = NULL;
991
char tempdir[] = "/tmp/mandosXXXXXX";
992
bool tempdir_created = false;
993
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
994
const char *seckey = PATHDIR "/" SECKEY;
995
const char *pubkey = PATHDIR "/" PUBKEY;
996
997
bool gnutls_initialized = false;
998
bool gpgme_initialized = false;
999
float delay = 2.5f;
1000
1001
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1002
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1003
1004
uid = getuid();
1005
gid = getgid();
1006
1007
/* Lower any group privileges we might have, just to be safe */
1008
errno = 0;
1009
ret = setgid(gid);
1010
if(ret == -1){
1011
perror("setgid");
1012
}
1013
1014
/* Lower user privileges (temporarily) */
1015
errno = 0;
1016
ret = seteuid(uid);
1017
if(ret == -1){
1018
perror("seteuid");
1019
}
1020
1021
if(quit_now){
1022
goto end;
1023
}
1024
1025
{
1026
struct argp_option options[] = {
1027
{ .name = "debug", .key = 128,
1028
.doc = "Debug mode", .group = 3 },
1029
{ .name = "connect", .key = 'c',
1030
.arg = "ADDRESS:PORT",
1031
.doc = "Connect directly to a specific Mandos server",
1032
.group = 1 },
1033
{ .name = "interface", .key = 'i',
1034
.arg = "NAME",
1035
.doc = "Network interface that will be used to search for"
1036
" Mandos servers",
1037
.group = 1 },
1038
{ .name = "seckey", .key = 's',
1039
.arg = "FILE",
1040
.doc = "OpenPGP secret key file base name",
1041
.group = 1 },
1042
{ .name = "pubkey", .key = 'p',
1043
.arg = "FILE",
1044
.doc = "OpenPGP public key file base name",
1045
.group = 2 },
1046
{ .name = "dh-bits", .key = 129,
1047
.arg = "BITS",
1048
.doc = "Bit length of the prime number used in the"
1049
" Diffie-Hellman key exchange",
1050
.group = 2 },
1051
{ .name = "priority", .key = 130,
1052
.arg = "STRING",
1053
.doc = "GnuTLS priority string for the TLS handshake",
1054
.group = 1 },
1055
{ .name = "delay", .key = 131,
1056
.arg = "SECONDS",
1057
.doc = "Maximum delay to wait for interface startup",
1058
.group = 2 },
1059
{ .name = NULL }
1060
};
1061
1062
error_t parse_opt(int key, char *arg,
1063
struct argp_state *state){
1064
switch(key){
1065
case 128: /* --debug */
1066
debug = true;
1067
break;
1068
case 'c': /* --connect */
1069
connect_to = arg;
1070
break;
1071
case 'i': /* --interface */
1072
interface = arg;
1073
break;
1074
case 's': /* --seckey */
1075
seckey = arg;
1076
break;
1077
case 'p': /* --pubkey */
1078
pubkey = arg;
1079
break;
1080
case 129: /* --dh-bits */
1081
errno = 0;
1082
tmpmax = strtoimax(arg, &tmp, 10);
1083
if(errno != 0 or tmp == arg or *tmp != '\0'
1084
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1087
}
1088
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1089
break;
1090
case 130: /* --priority */
1091
mc.priority = arg;
1092
break;
1093
case 131: /* --delay */
1094
errno = 0;
1095
delay = strtof(arg, &tmp);
1096
if(errno != 0 or tmp == arg or *tmp != '\0'){
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
1099
}
1100
break;
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
1104
break;
1105
default:
1106
return ARGP_ERR_UNKNOWN;
1107
}
1108
return 0;
1109
}
1110
1111
struct argp argp = { .options = options, .parser = parse_opt,
1112
.args_doc = "",
1113
.doc = "Mandos client -- Get and decrypt"
1114
" passwords from a Mandos server" };
1115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1116
if(ret == ARGP_ERR_UNKNOWN){
1117
fprintf(stderr, "Unknown error while parsing arguments\n");
1118
exitcode = EXIT_FAILURE;
1119
goto end;
1120
}
1121
}
1122
1123
if(not debug){
1124
avahi_set_log_function(empty_log);
1125
}
1126
1127
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1128
from the signal handler */
1129
/* Initialize the pseudo-RNG for Avahi */
1130
srand((unsigned int) time(NULL));
1131
mc.simple_poll = avahi_simple_poll_new();
1132
if(mc.simple_poll == NULL){
1133
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1134
exitcode = EXIT_FAILURE;
1135
goto end;
1136
}
1137
1138
sigemptyset(&sigterm_action.sa_mask);
1139
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1140
if(ret == -1){
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
1143
goto end;
1144
}
1145
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1146
if(ret == -1){
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
1149
goto end;
1150
}
1151
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1152
if(ret == -1){
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
1155
goto end;
1156
}
1157
/* Need to check if the handler is SIG_IGN before handling:
1158
| [[info:libc:Initial Signal Actions]] |
1159
| [[info:libc:Basic Signal Handling]] |
1160
*/
1161
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1162
if(ret == -1){
1163
perror("sigaction");
1164
return EXIT_FAILURE;
1165
}
1166
if(old_sigterm_action.sa_handler != SIG_IGN){
1167
ret = sigaction(SIGINT, &sigterm_action, NULL);
1168
if(ret == -1){
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
}
1174
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1175
if(ret == -1){
1176
perror("sigaction");
1177
return EXIT_FAILURE;
1178
}
1179
if(old_sigterm_action.sa_handler != SIG_IGN){
1180
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1181
if(ret == -1){
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
1184
goto end;
1185
}
1186
}
1187
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1188
if(ret == -1){
1189
perror("sigaction");
1190
return EXIT_FAILURE;
1191
}
1192
if(old_sigterm_action.sa_handler != SIG_IGN){
1193
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1194
if(ret == -1){
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
1197
goto end;
1198
}
1199
}
1200
1201
/* If the interface is down, bring it up */
1202
if(interface[0] != '\0'){
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
1204
if(if_index == 0){
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1206
exitcode = EXIT_FAILURE;
1207
goto end;
1208
}
1209
1210
if(quit_now){
1211
goto end;
1212
}
1213
1214
/* Re-raise priviliges */
1215
errno = 0;
1216
ret = seteuid(0);
1217
if(ret == -1){
1218
perror("seteuid");
1219
}
1220
1221
#ifdef __linux__
1222
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1223
messages to mess up the prompt */
1224
ret = klogctl(8, NULL, 5);
1225
bool restore_loglevel = true;
1226
if(ret == -1){
1227
restore_loglevel = false;
1228
perror("klogctl");
1229
}
1230
#endif /* __linux__ */
1231
1232
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1233
if(sd < 0){
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1236
#ifdef __linux__
1237
if(restore_loglevel){
1238
ret = klogctl(7, NULL, 0);
1239
if(ret == -1){
1240
perror("klogctl");
1241
}
1242
}
1243
#endif /* __linux__ */
1244
/* Lower privileges */
1245
errno = 0;
1246
ret = seteuid(uid);
1247
if(ret == -1){
1248
perror("seteuid");
1249
}
1250
goto end;
1251
}
1252
strcpy(network.ifr_name, interface);
1253
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1254
if(ret == -1){
1255
perror("ioctl SIOCGIFFLAGS");
1256
#ifdef __linux__
1257
if(restore_loglevel){
1258
ret = klogctl(7, NULL, 0);
1259
if(ret == -1){
1260
perror("klogctl");
1261
}
1262
}
1263
#endif /* __linux__ */
1264
exitcode = EXIT_FAILURE;
1265
/* Lower privileges */
1266
errno = 0;
1267
ret = seteuid(uid);
1268
if(ret == -1){
1269
perror("seteuid");
1270
}
1271
goto end;
1272
}
1273
if((network.ifr_flags & IFF_UP) == 0){
1274
network.ifr_flags |= IFF_UP;
1275
take_down_interface = true;
1276
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1277
if(ret == -1){
1278
take_down_interface = false;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1281
#ifdef __linux__
1282
if(restore_loglevel){
1283
ret = klogctl(7, NULL, 0);
1284
if(ret == -1){
1285
perror("klogctl");
1286
}
1287
}
1288
#endif /* __linux__ */
1289
/* Lower privileges */
1290
errno = 0;
1291
ret = seteuid(uid);
1292
if(ret == -1){
1293
perror("seteuid");
1294
}
1295
goto end;
1296
}
1297
}
1298
/* sleep checking until interface is running */
1299
for(int i=0; i < delay * 4; i++){
1300
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1301
if(ret == -1){
1302
perror("ioctl SIOCGIFFLAGS");
1303
} else if(network.ifr_flags & IFF_RUNNING){
1304
break;
1305
}
1306
struct timespec sleeptime = { .tv_nsec = 250000000 };
1307
ret = nanosleep(&sleeptime, NULL);
1308
if(ret == -1 and errno != EINTR){
1309
perror("nanosleep");
1310
}
1311
}
1312
if(not take_down_interface){
1313
/* We won't need the socket anymore */
1314
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1315
if(ret == -1){
1316
perror("close");
1317
}
1318
}
1319
#ifdef __linux__
1320
if(restore_loglevel){
1321
/* Restores kernel loglevel to default */
1322
ret = klogctl(7, NULL, 0);
1323
if(ret == -1){
1324
perror("klogctl");
1325
}
1326
}
1327
#endif /* __linux__ */
1328
/* Lower privileges */
1329
errno = 0;
1330
if(take_down_interface){
1331
/* Lower privileges */
1332
ret = seteuid(uid);
1333
if(ret == -1){
1334
perror("seteuid");
1335
}
1336
} else {
1337
/* Lower privileges permanently */
1338
ret = setuid(uid);
1339
if(ret == -1){
1340
perror("setuid");
1341
}
1342
}
1343
}
1344
1345
if(quit_now){
1346
goto end;
1347
}
1348
1349
ret = init_gnutls_global(pubkey, seckey);
1350
if(ret == -1){
1351
fprintf(stderr, "init_gnutls_global failed\n");
1352
exitcode = EXIT_FAILURE;
1353
goto end;
1354
} else {
1355
gnutls_initialized = true;
1356
}
1357
1358
if(quit_now){
1359
goto end;
1360
}
1361
1362
tempdir_created = true;
1363
if(mkdtemp(tempdir) == NULL){
1364
tempdir_created = false;
1365
perror("mkdtemp");
1366
goto end;
1367
}
1368
1369
if(quit_now){
1370
goto end;
1371
}
1372
1373
if(not init_gpgme(pubkey, seckey, tempdir)){
1374
fprintf(stderr, "init_gpgme failed\n");
1375
exitcode = EXIT_FAILURE;
1376
goto end;
1377
} else {
1378
gpgme_initialized = true;
1379
}
1380
1381
if(quit_now){
1382
goto end;
1383
}
1384
1385
if(connect_to != NULL){
1386
/* Connect directly, do not use Zeroconf */
1387
/* (Mainly meant for debugging) */
1388
char *address = strrchr(connect_to, ':');
1389
if(address == NULL){
1390
fprintf(stderr, "No colon in address\n");
1391
exitcode = EXIT_FAILURE;
1392
goto end;
1393
}
1394
1395
if(quit_now){
1396
goto end;
1397
}
1398
1399
uint16_t port;
1400
errno = 0;
1401
tmpmax = strtoimax(address+1, &tmp, 10);
1402
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1403
or tmpmax != (uint16_t)tmpmax){
1404
fprintf(stderr, "Bad port number\n");
1405
exitcode = EXIT_FAILURE;
1406
goto end;
1407
}
1408
1409
if(quit_now){
1410
goto end;
1411
}
1412
1413
port = (uint16_t)tmpmax;
1414
*address = '\0';
1415
address = connect_to;
1416
/* Colon in address indicates IPv6 */
1417
int af;
1418
if(strchr(address, ':') != NULL){
1419
af = AF_INET6;
1420
} else {
1421
af = AF_INET;
1422
}
1423
1424
if(quit_now){
1425
goto end;
1426
}
1427
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
1432
exitcode = EXIT_SUCCESS;
1433
}
1434
goto end;
1435
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1441
{
657
1442
AvahiServerConfig config;
658
AvahiSServiceBrowser *sb = NULL;
659
int error;
660
int ret;
661
int debug_int = 0;
662
int returncode = EXIT_SUCCESS;
663
const char *interface = NULL;
664
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
665
char *connect_to = NULL;
666
667
debug_int = debug ? 1 : 0;
668
while (true){
669
static struct option long_options[] = {
670
{"debug", no_argument, &debug_int, 1},
671
{"connect", required_argument, NULL, 'C'},
672
{"interface", required_argument, NULL, 'i'},
673
{"keydir", required_argument, NULL, 'd'},
674
{"seckey", required_argument, NULL, 'c'},
675
{"pubkey", required_argument, NULL, 'k'},
676
{"dh-bits", required_argument, NULL, 'D'},
677
{0, 0, 0, 0} };
678
679
int option_index = 0;
680
ret = getopt_long (argc, argv, "i:", long_options,
681
&option_index);
682
683
if (ret == -1){
684
break;
685
}
686
687
switch(ret){
688
case 0:
689
break;
690
case 'i':
691
interface = optarg;
692
break;
693
case 'C':
694
connect_to = optarg;
695
break;
696
case 'd':
697
keydir = optarg;
698
break;
699
case 'c':
700
pubkeyfile = optarg;
701
break;
702
case 'k':
703
seckeyfile = optarg;
704
break;
705
case 'D':
706
dh_bits = atoi(optarg);
707
break;
708
case '?':
709
break
710
default:
711
exit(EXIT_FAILURE);
712
}
713
}
714
debug = debug_int ? true : false;
715
716
pubkeyfile = combinepath(keydir, pubkeyfile);
717
if (pubkeyfile == NULL){
718
perror("combinepath");
719
goto exit;
720
}
721
722
if(interface != NULL){
723
if_index = (AvahiIfIndex) if_nametoindex(interface);
724
if(if_index == 0){
725
fprintf(stderr, "No such interface: \"%s\"\n", interface);
726
exit(EXIT_FAILURE);
727
}
728
}
729
730
if(connect_to != NULL){
731
/* Connect directly, do not use Zeroconf */
732
/* (Mainly meant for debugging) */
733
char *address = strrchr(connect_to, ':');
734
if(address == NULL){
735
fprintf(stderr, "No colon in address\n");
736
exit(EXIT_FAILURE);
737
}
738
errno = 0;
739
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
740
if(errno){
741
perror("Bad port number");
742
exit(EXIT_FAILURE);
743
}
744
*address = '\0';
745
address = connect_to;
746
ret = start_mandos_communication(address, port, if_index);
747
if(ret < 0){
748
exit(EXIT_FAILURE);
749
} else {
750
exit(EXIT_SUCCESS);
751
}
752
}
753
754
seckeyfile = combinepath(keydir, seckeyfile);
755
if (seckeyfile == NULL){
756
perror("combinepath");
757
goto exit;
758
}
759
760
if (not debug){
761
avahi_set_log_function(empty_log);
762
}
763
764
/* Initialize the psuedo-RNG */
765
srand((unsigned int) time(NULL));
766
767
/* Allocate main loop object */
768
if (!(simple_poll = avahi_simple_poll_new())) {
769
fprintf(stderr, "Failed to create simple poll object.\n");
770
771
goto exit;
772
}
773
774
/* Do not publish any local records */
1443
/* Do not publish any local Zeroconf records */
775
1444
avahi_server_config_init(&config);
776
1445
config.publish_hinfo = 0;
777
1446
config.publish_addresses = 0;
778
1447
config.publish_workstation = 0;
779
1448
config.publish_domain = 0;
780
1449
781
1450
/* Allocate a new server */
782
server = avahi_server_new(avahi_simple_poll_get(simple_poll),
783
&config, NULL, NULL, &error);
784
785
/* Free the configuration data */
1451
mc.server = avahi_server_new(avahi_simple_poll_get
1452
(mc.simple_poll), &config, NULL,
1453
NULL, &error);
1454
1455
/* Free the Avahi configuration data */
786
1456
avahi_server_config_free(&config);
787
788
/* Check if creating the server object succeeded */
789
if (!server) {
790
fprintf(stderr, "Failed to create server: %s\n",
791
avahi_strerror(error));
792
returncode = EXIT_FAILURE;
793
goto exit;
794
}
795
796
/* Create the service browser */
797
sb = avahi_s_service_browser_new(server, if_index,
798
AVAHI_PROTO_INET6,
799
"_mandos._tcp", NULL, 0,
800
browse_callback, server);
801
if (!sb) {
802
fprintf(stderr, "Failed to create service browser: %s\n",
803
avahi_strerror(avahi_server_errno(server)));
804
returncode = EXIT_FAILURE;
805
goto exit;
806
}
807
808
/* Run the main loop */
809
810
if (debug){
811
fprintf(stderr, "Starting avahi loop search\n");
812
}
813
814
avahi_simple_poll_loop(simple_poll);
815
816
exit:
817
818
if (debug){
819
fprintf(stderr, "%s exiting\n", argv[0]);
820
}
821
822
/* Cleanup things */
823
if (sb)
824
avahi_s_service_browser_free(sb);
825
826
if (server)
827
avahi_server_free(server);
828
829
if (simple_poll)
830
avahi_simple_poll_free(simple_poll);
831
free(pubkeyfile);
832
free(seckeyfile);
833
834
return returncode;
1457
}
1458
1459
/* Check if creating the Avahi server object succeeded */
1460
if(mc.server == NULL){
1461
fprintf(stderr, "Failed to create Avahi server: %s\n",
1462
avahi_strerror(error));
1463
exitcode = EXIT_FAILURE;
1464
goto end;
1465
}
1466
1467
if(quit_now){
1468
goto end;
1469
}
1470
1471
/* Create the Avahi service browser */
1472
sb = avahi_s_service_browser_new(mc.server, if_index,
1473
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1474
NULL, 0, browse_callback, NULL);
1475
if(sb == NULL){
1476
fprintf(stderr, "Failed to create service browser: %s\n",
1477
avahi_strerror(avahi_server_errno(mc.server)));
1478
exitcode = EXIT_FAILURE;
1479
goto end;
1480
}
1481
1482
if(quit_now){
1483
goto end;
1484
}
1485
1486
/* Run the main loop */
1487
1488
if(debug){
1489
fprintf(stderr, "Starting Avahi loop search\n");
1490
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
1493
1494
end:
1495
1496
if(debug){
1497
fprintf(stderr, "%s exiting\n", argv[0]);
1498
}
1499
1500
/* Cleanup things */
1501
if(sb != NULL)
1502
avahi_s_service_browser_free(sb);
1503
1504
if(mc.server != NULL)
1505
avahi_server_free(mc.server);
1506
1507
if(mc.simple_poll != NULL)
1508
avahi_simple_poll_free(mc.simple_poll);
1509
1510
if(gnutls_initialized){
1511
gnutls_certificate_free_credentials(mc.cred);
1512
gnutls_global_deinit();
1513
gnutls_dh_params_deinit(mc.dh_params);
1514
}
1515
1516
if(gpgme_initialized){
1517
gpgme_release(mc.ctx);
1518
}
1519
1520
/* Take down the network interface */
1521
if(take_down_interface){
1522
/* Re-raise priviliges */
1523
errno = 0;
1524
ret = seteuid(0);
1525
if(ret == -1){
1526
perror("seteuid");
1527
}
1528
if(geteuid() == 0){
1529
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1530
if(ret == -1){
1531
perror("ioctl SIOCGIFFLAGS");
1532
} else if(network.ifr_flags & IFF_UP) {
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1535
if(ret == -1){
1536
perror("ioctl SIOCSIFFLAGS");
1537
}
1538
}
1539
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1540
if(ret == -1){
1541
perror("close");
1542
}
1543
/* Lower privileges permanently */
1544
errno = 0;
1545
ret = setuid(uid);
1546
if(ret == -1){
1547
perror("setuid");
1548
}
1549
}
1550
}
1551
1552
/* Removes the temp directory used by GPGME */
1553
if(tempdir_created){
1554
DIR *d;
1555
struct dirent *direntry;
1556
d = opendir(tempdir);
1557
if(d == NULL){
1558
if(errno != ENOENT){
1559
perror("opendir");
1560
}
1561
} else {
1562
while(true){
1563
direntry = readdir(d);
1564
if(direntry == NULL){
1565
break;
1566
}
1567
/* Skip "." and ".." */
1568
if(direntry->d_name[0] == '.'
1569
and (direntry->d_name[1] == '\0'
1570
or (direntry->d_name[1] == '.'
1571
and direntry->d_name[2] == '\0'))){
1572
continue;
1573
}
1574
char *fullname = NULL;
1575
ret = asprintf(&fullname, "%s/%s", tempdir,
1576
direntry->d_name);
1577
if(ret < 0){
1578
perror("asprintf");
1579
continue;
1580
}
1581
ret = remove(fullname);
1582
if(ret == -1){
1583
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1584
strerror(errno));
1585
}
1586
free(fullname);
1587
}
1588
closedir(d);
1589
}
1590
ret = rmdir(tempdir);
1591
if(ret == -1 and errno != ENOENT){
1592
perror("rmdir");
1593
}
1594
}
1595
1596
if(quit_now){
1597
sigemptyset(&old_sigterm_action.sa_mask);
1598
old_sigterm_action.sa_handler = SIG_DFL;
1599
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1600
&old_sigterm_action,
1601
NULL));
1602
if(ret == -1){
1603
perror("sigaction");
1604
}
1605
do {
1606
ret = raise(signal_received);
1607
} while(ret != 0 and errno == EINTR);
1608
if(ret != 0){
1609
perror("raise");
1610
abort();
1611
}
1612
TEMP_FAILURE_RETRY(pause());
1613
}
1614
1615
return exitcode;
835
1616
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0