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- Committer: Teddy Hogeborn
- Date: 2009-10-24 17:56:24 UTC
- mto: (24.1.146 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20091024175624-86qzvjlfp3qd8y8n
* mandos-keygen (keygen): Warn about long key generation time.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
36
37
#include <stdio.h> /* fprintf(), stderr, fwrite(), stdout, ferror() */
38
#endif
39
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
38
44
#include <stdint.h> /* uint16_t, uint32_t */
39
45
#include <stddef.h> /* NULL, size_t, ssize_t */
40
#include <stdlib.h> /* free() */
41
#include <stdbool.h> /* bool, true */
42
#include <string.h> /* memset(), strcmp(), strlen, strerror() */
43
#include <sys/ioctl.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
44
SIOCSIFFLAGS */
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 */
45
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
46
sockaddr_in6, PF_INET6, SOCK_STREAM, INET6_ADDRSTRLEN */
53
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
47
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
48
struct in6_addr, inet_pton(),
49
connect() */
50
#include <assert.h>
51
#include <errno.h> /* perror() */
52
#include <time.h>
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() */
53
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
54
68
SIOCSIFFLAGS, if_indextoname(),
55
69
if_nametoindex(), IF_NAMESIZE */
56
#include <unistd.h> /* close(), SEEK_SET, off_t, write()*/
57
#include <netinet/in.h>
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() */
58
76
#include <arpa/inet.h> /* inet_pton(), htons */
59
#include <iso646.h> /* not */
60
#include <argp.h> /* struct argp_option,
61
struct argp_state, struct argp,
62
argp_parse() */
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__ */
63
89
64
90
/* Avahi */
65
#include <avahi-core/core.h> /* AvahiSimplePoll, AvahiServer,
66
AvahiIfIndex */
91
/* All Avahi types, constants and functions
92
Avahi*, avahi_*,
93
AVAHI_* */
94
#include <avahi-core/core.h>
67
95
#include <avahi-core/lookup.h>
68
#include <avahi-core/log.h> /* AvahiLogLevel */
96
#include <avahi-core/log.h>
69
97
#include <avahi-common/simple-watch.h>
70
98
#include <avahi-common/malloc.h>
71
99
#include <avahi-common/error.h>
72
100
73
101
/* GnuTLS */
74
#include <gnutls/gnutls.h> /* gnutls_certificate_credentials_t,
75
gnutls_dh_params_t,
76
gnutls_strerror(),
77
gnutls_global_init(),
78
gnutls_global_set_log_level(),
79
gnutls_global_set_log_function(),
80
gnutls_certificate_allocate_credentials(),
81
gnutls_global_deinit(),
82
gnutls_dh_params_init(),
83
gnutls_dh_params_generate(),
84
gnutls_certificate_set_dh_params(),
85
gnutls_certificate_free_credentials(),
86
gnutls_session_t, gnutls_init(),
87
gnutls_priority_set_direct(),
88
gnutls_deinit(),
89
gnutls_credentials_set(),
90
gnutls_certificate_server_set_request(),
91
gnutls_dh_set_prime_bits(),
92
gnutls_transport_set_ptr(),
93
gnutls_transport_ptr_t,
94
gnutls_handshake(),
95
gnutls_record_recv()
96
gnutls_perror(), gnutls_bye(),
102
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
103
functions:
104
gnutls_*
97
105
init_gnutls_session(),
98
GNUTLS_E_SUCCESS,
99
GNUTLS_CRD_CERTIFICATE,
100
GNUTLS_CERT_IGNORE,
101
GNUTLS_E_INTERRUPTED,
102
GNUTLS_E_AGAIN,
103
GNUTLS_E_REHANDSHAKE,
104
GNUTLS_SHUT_RDWR, */
105
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
106
GNUTLS_OPENPGP_FMT_BASE64 */
106
GNUTLS_* */
107
#include <gnutls/openpgp.h>
108
/* gnutls_certificate_set_openpgp_key_file(),
109
GNUTLS_OPENPGP_FMT_BASE64 */
107
110
108
111
/* GPGME */
109
#include <gpgme.h> /* gpgme_data_t, gpgme_ctx_t,
110
gpgme_error_t, gpgme_engine_info_t,
111
gpgme_check_version(),
112
gpgme_engine_check_version(),
113
gpgme_strsource(),
114
gpgme_strerror(),
115
gpgme_get_engine_info(),
116
gpgme_set_engine_info(),
117
gpgme_data_new_from_mem(),
118
gpgme_data_new(), gpgme_new(),
119
gpgme_op_decrypt(),
120
gpgme_decrypt_result_t,
121
gpgme_op_decrypt_result(),
122
gpgme_recipient_t,
123
gpgme_pubkey_algo_name(),
124
gpgme_data_seek(),
125
gpgme_data_read(),
126
gpgme_data_release()
112
#include <gpgme.h> /* All GPGME types, constants and
113
functions:
114
gpgme_*
127
115
GPGME_PROTOCOL_OpenPGP,
128
GPG_ERR_NO_ERROR,
129
GPG_ERR_NO_SECKEY, */
116
GPG_ERR_NO_* */
130
117
131
118
#define BUFFER_SIZE 256
132
119
120
#define PATHDIR "/conf/conf.d/mandos"
121
#define SECKEY "seckey.txt"
122
#define PUBKEY "pubkey.txt"
123
133
124
bool debug = false;
134
static const char *keydir = "/conf/conf.d/mandos";
135
125
static const char mandos_protocol_version[] = "1";
136
const char *argp_program_version = "mandosclient 0.9";
126
const char *argp_program_version = "mandos-client " VERSION;
137
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
138
128
139
129
/* Used for passing in values through the Avahi callback functions */
144
134
unsigned int dh_bits;
145
135
gnutls_dh_params_t dh_params;
146
136
const char *priority;
137
gpgme_ctx_t ctx;
147
138
} mandos_context;
148
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
149
148
/*
150
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
151
* "buffer_capacity" is how much is currently allocated,
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
150
* bytes. "buffer_capacity" is how much is currently allocated,
152
151
* "buffer_length" is how much is already used.
153
152
*/
154
size_t adjustbuffer(char **buffer, size_t buffer_length,
153
size_t incbuffer(char **buffer, size_t buffer_length,
155
154
size_t buffer_capacity){
156
if (buffer_length + BUFFER_SIZE > buffer_capacity){
155
if(buffer_length + BUFFER_SIZE > buffer_capacity){
157
156
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
158
if (buffer == NULL){
157
if(buffer == NULL){
159
158
return 0;
160
159
}
161
160
buffer_capacity += BUFFER_SIZE;
164
163
}
165
164
166
165
/*
167
* Decrypt OpenPGP data using keyrings in HOMEDIR.
168
* Returns -1 on error
166
* Initialize GPGME.
169
167
*/
170
static ssize_t pgp_packet_decrypt (const char *cryptotext,
171
size_t crypto_size,
172
char **plaintext,
173
const char *homedir){
174
gpgme_data_t dh_crypto, dh_plain;
175
gpgme_ctx_t ctx;
168
static bool init_gpgme(const char *seckey,
169
const char *pubkey, const char *tempdir){
176
170
gpgme_error_t rc;
177
ssize_t ret;
178
size_t plaintext_capacity = 0;
179
ssize_t plaintext_length = 0;
180
171
gpgme_engine_info_t engine_info;
181
172
182
if (debug){
183
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
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");
184
212
}
185
213
186
214
/* Init GPGME */
187
215
gpgme_check_version(NULL);
188
216
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
189
if (rc != GPG_ERR_NO_ERROR){
217
if(rc != GPG_ERR_NO_ERROR){
190
218
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
191
219
gpgme_strsource(rc), gpgme_strerror(rc));
192
return -1;
220
return false;
193
221
}
194
222
195
/* Set GPGME home directory for the OpenPGP engine only */
196
rc = gpgme_get_engine_info (&engine_info);
197
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){
198
226
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
199
227
gpgme_strsource(rc), gpgme_strerror(rc));
200
return -1;
228
return false;
201
229
}
202
230
while(engine_info != NULL){
203
231
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
204
232
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
205
engine_info->file_name, homedir);
233
engine_info->file_name, tempdir);
206
234
break;
207
235
}
208
236
engine_info = engine_info->next;
209
237
}
210
238
if(engine_info == NULL){
211
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
212
return -1;
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");
213
273
}
214
274
215
275
/* Create new GPGME data buffer from memory cryptotext */
216
276
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
217
277
0);
218
if (rc != GPG_ERR_NO_ERROR){
278
if(rc != GPG_ERR_NO_ERROR){
219
279
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
220
280
gpgme_strsource(rc), gpgme_strerror(rc));
221
281
return -1;
223
283
224
284
/* Create new empty GPGME data buffer for the plaintext */
225
285
rc = gpgme_data_new(&dh_plain);
226
if (rc != GPG_ERR_NO_ERROR){
286
if(rc != GPG_ERR_NO_ERROR){
227
287
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
228
288
gpgme_strsource(rc), gpgme_strerror(rc));
229
289
gpgme_data_release(dh_crypto);
230
290
return -1;
231
291
}
232
292
233
/* Create new GPGME "context" */
234
rc = gpgme_new(&ctx);
235
if (rc != GPG_ERR_NO_ERROR){
236
fprintf(stderr, "bad gpgme_new: %s: %s\n",
237
gpgme_strsource(rc), gpgme_strerror(rc));
238
plaintext_length = -1;
239
goto decrypt_end;
240
}
241
242
293
/* Decrypt data from the cryptotext data buffer to the plaintext
243
294
data buffer */
244
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
245
if (rc != GPG_ERR_NO_ERROR){
295
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
296
if(rc != GPG_ERR_NO_ERROR){
246
297
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
247
298
gpgme_strsource(rc), gpgme_strerror(rc));
248
299
plaintext_length = -1;
249
goto decrypt_end;
250
}
251
252
if(debug){
253
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
254
}
255
256
if (debug){
257
gpgme_decrypt_result_t result;
258
result = gpgme_op_decrypt_result(ctx);
259
if (result == NULL){
260
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
261
} else {
262
fprintf(stderr, "Unsupported algorithm: %s\n",
263
result->unsupported_algorithm);
264
fprintf(stderr, "Wrong key usage: %d\n",
265
result->wrong_key_usage);
266
if(result->file_name != NULL){
267
fprintf(stderr, "File name: %s\n", result->file_name);
268
}
269
gpgme_recipient_t recipient;
270
recipient = result->recipients;
271
if(recipient){
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;
272
315
while(recipient != NULL){
273
316
fprintf(stderr, "Public key algorithm: %s\n",
274
317
gpgme_pubkey_algo_name(recipient->pubkey_algo));
280
323
}
281
324
}
282
325
}
326
goto decrypt_end;
327
}
328
329
if(debug){
330
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
283
331
}
284
332
285
333
/* Seek back to the beginning of the GPGME plaintext data buffer */
286
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
287
perror("pgpme_data_seek");
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
335
perror("gpgme_data_seek");
288
336
plaintext_length = -1;
289
337
goto decrypt_end;
290
338
}
291
339
292
340
*plaintext = NULL;
293
341
while(true){
294
plaintext_capacity = adjustbuffer(plaintext,
342
plaintext_capacity = incbuffer(plaintext,
295
343
(size_t)plaintext_length,
296
344
plaintext_capacity);
297
if (plaintext_capacity == 0){
298
perror("adjustbuffer");
345
if(plaintext_capacity == 0){
346
perror("incbuffer");
299
347
plaintext_length = -1;
300
348
goto decrypt_end;
301
349
}
303
351
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
304
352
BUFFER_SIZE);
305
353
/* Print the data, if any */
306
if (ret == 0){
354
if(ret == 0){
307
355
/* EOF */
308
356
break;
309
357
}
314
362
}
315
363
plaintext_length += ret;
316
364
}
317
365
318
366
if(debug){
319
367
fprintf(stderr, "Decrypted password is: ");
320
368
for(ssize_t i = 0; i < plaintext_length; i++){
333
381
return plaintext_length;
334
382
}
335
383
336
static const char * safer_gnutls_strerror (int value) {
337
const char *ret = gnutls_strerror (value);
338
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)
339
388
ret = "(unknown)";
340
389
return ret;
341
390
}
346
395
fprintf(stderr, "GnuTLS: %s", string);
347
396
}
348
397
349
static int init_gnutls_global(mandos_context *mc,
350
const char *pubkeyfile,
351
const char *seckeyfile){
398
static int init_gnutls_global(const char *pubkeyfilename,
399
const char *seckeyfilename){
352
400
int ret;
353
401
354
402
if(debug){
355
403
fprintf(stderr, "Initializing GnuTLS\n");
356
404
}
357
358
if ((ret = gnutls_global_init ())
359
!= GNUTLS_E_SUCCESS) {
360
fprintf (stderr, "GnuTLS global_init: %s\n",
361
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));
362
410
return -1;
363
411
}
364
412
365
if (debug){
413
if(debug){
366
414
/* "Use a log level over 10 to enable all debugging options."
367
415
* - GnuTLS manual
368
416
*/
371
419
}
372
420
373
421
/* OpenPGP credentials */
374
if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))
375
!= GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "GnuTLS memory error: %s\n",
377
safer_gnutls_strerror(ret));
378
gnutls_global_deinit ();
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();
379
430
return -1;
380
431
}
381
432
382
433
if(debug){
383
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
384
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
385
seckeyfile);
434
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
435
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
436
seckeyfilename);
386
437
}
387
438
388
439
ret = gnutls_certificate_set_openpgp_key_file
389
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
390
if (ret != GNUTLS_E_SUCCESS) {
440
(mc.cred, pubkeyfilename, seckeyfilename,
441
GNUTLS_OPENPGP_FMT_BASE64);
442
if(ret != GNUTLS_E_SUCCESS){
391
443
fprintf(stderr,
392
444
"Error[%d] while reading the OpenPGP key pair ('%s',"
393
" '%s')\n", ret, pubkeyfile, seckeyfile);
394
fprintf(stdout, "The GnuTLS error is: %s\n",
445
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
fprintf(stderr, "The GnuTLS error is: %s\n",
395
447
safer_gnutls_strerror(ret));
396
448
goto globalfail;
397
449
}
398
450
399
451
/* GnuTLS server initialization */
400
ret = gnutls_dh_params_init(&mc->dh_params);
401
if (ret != GNUTLS_E_SUCCESS) {
402
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
403
" %s\n", safer_gnutls_strerror(ret));
404
goto globalfail;
405
}
406
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
407
if (ret != GNUTLS_E_SUCCESS) {
408
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
409
safer_gnutls_strerror(ret));
410
goto globalfail;
411
}
412
413
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
414
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
415
467
return 0;
416
468
417
469
globalfail:
418
419
gnutls_certificate_free_credentials(mc->cred);
470
471
gnutls_certificate_free_credentials(mc.cred);
420
472
gnutls_global_deinit();
473
gnutls_dh_params_deinit(mc.dh_params);
421
474
return -1;
422
423
475
}
424
476
425
static int init_gnutls_session(mandos_context *mc,
426
gnutls_session_t *session){
477
static int init_gnutls_session(gnutls_session_t *session){
427
478
int ret;
428
479
/* GnuTLS session creation */
429
ret = gnutls_init(session, GNUTLS_SERVER);
430
if (ret != GNUTLS_E_SUCCESS){
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){
431
487
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
432
488
safer_gnutls_strerror(ret));
433
489
}
434
490
435
491
{
436
492
const char *err;
437
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
438
if (ret != GNUTLS_E_SUCCESS) {
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){
439
501
fprintf(stderr, "Syntax error at: %s\n", err);
440
502
fprintf(stderr, "GnuTLS error: %s\n",
441
503
safer_gnutls_strerror(ret));
442
gnutls_deinit (*session);
504
gnutls_deinit(*session);
443
505
return -1;
444
506
}
445
507
}
446
508
447
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
448
mc->cred);
449
if (ret != GNUTLS_E_SUCCESS) {
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){
450
518
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
451
519
safer_gnutls_strerror(ret));
452
gnutls_deinit (*session);
520
gnutls_deinit(*session);
453
521
return -1;
454
522
}
455
523
456
524
/* ignore client certificate if any. */
457
gnutls_certificate_server_set_request (*session,
458
GNUTLS_CERT_IGNORE);
525
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
459
526
460
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
527
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
461
528
462
529
return 0;
463
530
}
469
536
/* Called when a Mandos server is found */
470
537
static int start_mandos_communication(const char *ip, uint16_t port,
471
538
AvahiIfIndex if_index,
472
mandos_context *mc){
473
int ret, tcp_sd;
474
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
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;
475
546
char *buffer = NULL;
476
char *decrypted_buffer;
547
char *decrypted_buffer = NULL;
477
548
size_t buffer_length = 0;
478
549
size_t buffer_capacity = 0;
479
ssize_t decrypted_buffer_size;
480
550
size_t written;
481
int retval = 0;
482
char interface[IF_NAMESIZE];
551
int retval = -1;
483
552
gnutls_session_t session;
484
485
ret = init_gnutls_session (mc, &session);
486
if (ret != 0){
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){
487
573
return -1;
488
574
}
489
575
490
576
if(debug){
491
fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",
492
ip, port);
577
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
578
"\n", ip, port);
493
579
}
494
580
495
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
496
if(tcp_sd < 0) {
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
582
if(tcp_sd < 0){
497
583
perror("socket");
498
return -1;
499
}
500
501
if(debug){
502
if(if_indextoname((unsigned int)if_index, interface) == NULL){
503
perror("if_indextoname");
504
return -1;
505
}
506
fprintf(stderr, "Binding to interface %s\n", interface);
507
}
508
509
memset(&to,0,sizeof(to)); /* Spurious warning */
510
to.in6.sin6_family = AF_INET6;
511
/* It would be nice to have a way to detect if we were passed an
512
IPv4 address here. Now we assume an IPv6 address. */
513
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
514
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 ){
515
600
perror("inet_pton");
516
return -1;
601
goto mandos_end;
517
602
}
518
603
if(ret == 0){
519
604
fprintf(stderr, "Bad address: %s\n", ip);
520
return -1;
521
}
522
to.in6.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
}
523
628
524
to.in6.sin6_scope_id = (uint32_t)if_index;
629
if(quit_now){
630
goto mandos_end;
631
}
525
632
526
633
if(debug){
527
fprintf(stderr, "Connection to: %s, port %d\n", ip, port);
528
char addrstr[INET6_ADDRSTRLEN] = "";
529
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
530
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){
531
657
perror("inet_ntop");
532
658
} else {
533
659
if(strcmp(addrstr, ip) != 0){
536
662
}
537
663
}
538
664
539
ret = connect(tcp_sd, &to.in, sizeof(to));
540
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){
541
675
perror("connect");
542
return -1;
543
}
544
676
goto mandos_end;
677
}
678
679
if(quit_now){
680
goto mandos_end;
681
}
682
545
683
const char *out = mandos_protocol_version;
546
684
written = 0;
547
while (true){
685
while(true){
548
686
size_t out_size = strlen(out);
549
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
687
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
550
688
out_size - written));
551
if (ret == -1){
689
if(ret == -1){
552
690
perror("write");
553
retval = -1;
554
691
goto mandos_end;
555
692
}
556
693
written += (size_t)ret;
557
694
if(written < out_size){
558
695
continue;
559
696
} else {
560
if (out == mandos_protocol_version){
697
if(out == mandos_protocol_version){
561
698
written = 0;
562
699
out = "\r\n";
563
700
} else {
564
701
break;
565
702
}
566
703
}
704
705
if(quit_now){
706
goto mandos_end;
707
}
567
708
}
568
709
569
710
if(debug){
570
711
fprintf(stderr, "Establishing TLS session with %s\n", ip);
571
712
}
572
713
573
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
574
575
ret = gnutls_handshake (session);
576
577
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){
578
732
if(debug){
579
733
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
580
gnutls_perror (ret);
734
gnutls_perror(ret);
581
735
}
582
retval = -1;
583
736
goto mandos_end;
584
737
}
585
738
586
739
/* Read OpenPGP packet that contains the wanted password */
587
740
588
741
if(debug){
589
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
742
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
590
743
ip);
591
744
}
592
745
593
746
while(true){
594
buffer_capacity = adjustbuffer(&buffer, buffer_length,
747
748
if(quit_now){
749
goto mandos_end;
750
}
751
752
buffer_capacity = incbuffer(&buffer, buffer_length,
595
753
buffer_capacity);
596
if (buffer_capacity == 0){
597
perror("adjustbuffer");
598
retval = -1;
599
goto mandos_end;
600
}
601
602
ret = gnutls_record_recv(session, buffer+buffer_length,
603
BUFFER_SIZE);
604
if (ret == 0){
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){
605
766
break;
606
767
}
607
if (ret < 0){
608
switch(ret){
768
if(sret < 0){
769
switch(sret){
609
770
case GNUTLS_E_INTERRUPTED:
610
771
case GNUTLS_E_AGAIN:
611
772
break;
612
773
case GNUTLS_E_REHANDSHAKE:
613
ret = gnutls_handshake (session);
614
if (ret < 0){
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){
615
782
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
616
gnutls_perror (ret);
617
retval = -1;
783
gnutls_perror(ret);
618
784
goto mandos_end;
619
785
}
620
786
break;
621
787
default:
622
788
fprintf(stderr, "Unknown error while reading data from"
623
789
" encrypted session with Mandos server\n");
624
retval = -1;
625
gnutls_bye (session, GNUTLS_SHUT_RDWR);
790
gnutls_bye(session, GNUTLS_SHUT_RDWR);
626
791
goto mandos_end;
627
792
}
628
793
} else {
629
buffer_length += (size_t) ret;
794
buffer_length += (size_t) sret;
630
795
}
631
796
}
632
797
634
799
fprintf(stderr, "Closing TLS session\n");
635
800
}
636
801
637
gnutls_bye (session, GNUTLS_SHUT_RDWR);
638
639
if (buffer_length > 0){
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;
640
815
decrypted_buffer_size = pgp_packet_decrypt(buffer,
641
816
buffer_length,
642
&decrypted_buffer,
643
keydir);
644
if (decrypted_buffer_size >= 0){
817
&decrypted_buffer);
818
if(decrypted_buffer_size >= 0){
819
645
820
written = 0;
646
821
while(written < (size_t) decrypted_buffer_size){
647
ret = (int)fwrite (decrypted_buffer + written, 1,
648
(size_t)decrypted_buffer_size - written,
649
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);
650
829
if(ret == 0 and ferror(stdout)){
651
830
if(debug){
652
831
fprintf(stderr, "Error writing encrypted data: %s\n",
653
832
strerror(errno));
654
833
}
655
retval = -1;
656
break;
834
goto mandos_end;
657
835
}
658
836
written += (size_t)ret;
659
837
}
660
free(decrypted_buffer);
661
} else {
662
retval = -1;
838
retval = 0;
663
839
}
664
840
}
665
841
666
842
/* Shutdown procedure */
667
843
668
844
mandos_end:
845
free(decrypted_buffer);
669
846
free(buffer);
670
close(tcp_sd);
671
gnutls_deinit (session);
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
}
672
857
return retval;
673
858
}
674
859
675
860
static void resolve_callback(AvahiSServiceResolver *r,
676
861
AvahiIfIndex interface,
677
AVAHI_GCC_UNUSED AvahiProtocol protocol,
862
AvahiProtocol proto,
678
863
AvahiResolverEvent event,
679
864
const char *name,
680
865
const char *type,
685
870
AVAHI_GCC_UNUSED AvahiStringList *txt,
686
871
AVAHI_GCC_UNUSED AvahiLookupResultFlags
687
872
flags,
688
void* userdata) {
689
mandos_context *mc = userdata;
690
assert(r); /* Spurious warning */
873
AVAHI_GCC_UNUSED void* userdata){
874
assert(r);
691
875
692
876
/* Called whenever a service has been resolved successfully or
693
877
timed out */
694
878
695
switch (event) {
879
if(quit_now){
880
return;
881
}
882
883
switch(event){
696
884
default:
697
885
case AVAHI_RESOLVER_FAILURE:
698
886
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
699
887
" of type '%s' in domain '%s': %s\n", name, type, domain,
700
avahi_strerror(avahi_server_errno(mc->server)));
888
avahi_strerror(avahi_server_errno(mc.server)));
701
889
break;
702
890
703
891
case AVAHI_RESOLVER_FOUND:
705
893
char ip[AVAHI_ADDRESS_STR_MAX];
706
894
avahi_address_snprint(ip, sizeof(ip), address);
707
895
if(debug){
708
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %d) on"
709
" port %d\n", name, host_name, ip, interface, 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);
710
899
}
711
int ret = start_mandos_communication(ip, port, interface, mc);
712
if (ret == 0){
713
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);
714
904
}
715
905
}
716
906
}
717
907
avahi_s_service_resolver_free(r);
718
908
}
719
909
720
static void browse_callback( AvahiSServiceBrowser *b,
721
AvahiIfIndex interface,
722
AvahiProtocol protocol,
723
AvahiBrowserEvent event,
724
const char *name,
725
const char *type,
726
const char *domain,
727
AVAHI_GCC_UNUSED AvahiLookupResultFlags
728
flags,
729
void* userdata) {
730
mandos_context *mc = userdata;
731
assert(b); /* Spurious warning */
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);
732
921
733
922
/* Called whenever a new services becomes available on the LAN or
734
923
is removed from the LAN */
735
924
736
switch (event) {
925
if(quit_now){
926
return;
927
}
928
929
switch(event){
737
930
default:
738
931
case AVAHI_BROWSER_FAILURE:
739
932
740
933
fprintf(stderr, "(Avahi browser) %s\n",
741
avahi_strerror(avahi_server_errno(mc->server)));
742
avahi_simple_poll_quit(mc->simple_poll);
934
avahi_strerror(avahi_server_errno(mc.server)));
935
avahi_simple_poll_quit(mc.simple_poll);
743
936
return;
744
937
745
938
case AVAHI_BROWSER_NEW:
748
941
the callback function is called the Avahi server will free the
749
942
resolver for us. */
750
943
751
if (!(avahi_s_service_resolver_new(mc->server, interface,
752
protocol, name, type, domain,
753
AVAHI_PROTO_INET6, 0,
754
resolve_callback, mc)))
944
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
945
name, type, domain, protocol, 0,
946
resolve_callback, NULL) == NULL)
755
947
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
756
name, avahi_strerror(avahi_server_errno(mc->server)));
948
name, avahi_strerror(avahi_server_errno(mc.server)));
757
949
break;
758
950
759
951
case AVAHI_BROWSER_REMOVE:
768
960
}
769
961
}
770
962
771
/* Combines file name and path and returns the malloced new
772
string. some sane checks could/should be added */
773
static const char *combinepath(const char *first, const char *second){
774
size_t f_len = strlen(first);
775
size_t s_len = strlen(second);
776
char *tmp = malloc(f_len + s_len + 2);
777
if (tmp == NULL){
778
return NULL;
779
}
780
if(f_len > 0){
781
memcpy(tmp, first, f_len); /* Spurious warning */
782
}
783
tmp[f_len] = '/';
784
if(s_len > 0){
785
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
786
}
787
tmp[f_len + 1 + s_len] = '\0';
788
return tmp;
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;
789
975
}
790
976
791
792
977
int main(int argc, char *argv[]){
793
AvahiSServiceBrowser *sb = NULL;
794
int error;
795
int ret;
796
int exitcode = EXIT_SUCCESS;
797
const char *interface = "eth0";
798
struct ifreq network;
799
int sd;
800
uid_t uid;
801
gid_t gid;
802
char *connect_to = NULL;
803
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
804
const char *pubkeyfile = "pubkey.txt";
805
const char *seckeyfile = "seckey.txt";
806
mandos_context mc = { .simple_poll = NULL, .server = NULL,
807
.dh_bits = 1024, .priority = "SECURE256"};
808
bool gnutls_initalized = false;
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
};
809
1061
810
{
811
struct argp_option options[] = {
812
{ .name = "debug", .key = 128,
813
.doc = "Debug mode", .group = 3 },
814
{ .name = "connect", .key = 'c',
815
.arg = "IP",
816
.doc = "Connect directly to a sepcified mandos server",
817
.group = 1 },
818
{ .name = "interface", .key = 'i',
819
.arg = "INTERFACE",
820
.doc = "Interface that Avahi will conntect through",
821
.group = 1 },
822
{ .name = "keydir", .key = 'd',
823
.arg = "KEYDIR",
824
.doc = "Directory where the openpgp keyring is",
825
.group = 1 },
826
{ .name = "seckey", .key = 's',
827
.arg = "SECKEY",
828
.doc = "Secret openpgp key for gnutls authentication",
829
.group = 1 },
830
{ .name = "pubkey", .key = 'p',
831
.arg = "PUBKEY",
832
.doc = "Public openpgp key for gnutls authentication",
833
.group = 2 },
834
{ .name = "dh-bits", .key = 129,
835
.arg = "BITS",
836
.doc = "dh-bits to use in gnutls communication",
837
.group = 2 },
838
{ .name = "priority", .key = 130,
839
.arg = "PRIORITY",
840
.doc = "GNUTLS priority", .group = 1 },
841
{ .name = NULL }
842
};
843
844
845
error_t parse_opt (int key, char *arg,
846
struct argp_state *state) {
847
/* Get the INPUT argument from `argp_parse', which we know is
848
a pointer to our plugin list pointer. */
849
switch (key) {
850
case 128:
851
debug = true;
852
break;
853
case 'c':
854
connect_to = arg;
855
break;
856
case 'i':
857
interface = arg;
858
break;
859
case 'd':
860
keydir = arg;
861
break;
862
case 's':
863
seckeyfile = arg;
864
break;
865
case 'p':
866
pubkeyfile = arg;
867
break;
868
case 129:
869
errno = 0;
870
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
871
if (errno){
872
perror("strtol");
873
exit(EXIT_FAILURE);
874
}
875
break;
876
case 130:
877
mc.priority = arg;
878
break;
879
case ARGP_KEY_ARG:
880
argp_usage (state);
881
break;
882
case ARGP_KEY_END:
883
break;
884
default:
885
return ARGP_ERR_UNKNOWN;
886
}
887
return 0;
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;
888
1107
}
889
890
struct argp argp = { .options = options, .parser = parse_opt,
891
.args_doc = "",
892
.doc = "Mandos client -- Get and decrypt"
893
" passwords from mandos server" };
894
argp_parse (&argp, argc, argv, 0, 0, NULL);
895
}
896
897
pubkeyfile = combinepath(keydir, pubkeyfile);
898
if (pubkeyfile == NULL){
899
perror("combinepath");
900
exitcode = EXIT_FAILURE;
901
goto end;
902
}
903
904
seckeyfile = combinepath(keydir, seckeyfile);
905
if (seckeyfile == NULL){
906
perror("combinepath");
907
goto end;
908
}
909
910
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
911
if (ret == -1){
912
fprintf(stderr, "init_gnutls_global\n");
913
goto end;
914
} else {
915
gnutls_initalized = true;
916
}
917
918
uid = getuid();
919
gid = getgid();
920
921
ret = setuid(uid);
922
if (ret == -1){
923
perror("setuid");
924
}
925
926
setgid(gid);
927
if (ret == -1){
928
perror("setgid");
929
}
930
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'){
931
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
932
1204
if(if_index == 0){
933
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
934
exit(EXIT_FAILURE);
935
}
936
937
if(connect_to != NULL){
938
/* Connect directly, do not use Zeroconf */
939
/* (Mainly meant for debugging) */
940
char *address = strrchr(connect_to, ':');
941
if(address == NULL){
942
fprintf(stderr, "No colon in address\n");
943
exitcode = EXIT_FAILURE;
944
goto end;
945
}
946
errno = 0;
947
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
948
if(errno){
949
perror("Bad port number");
950
exitcode = EXIT_FAILURE;
951
goto end;
952
}
953
*address = '\0';
954
address = connect_to;
955
ret = start_mandos_communication(address, port, if_index, &mc);
956
if(ret < 0){
957
exitcode = EXIT_FAILURE;
958
} else {
959
exitcode = EXIT_SUCCESS;
960
}
961
goto end;
962
}
963
964
/* If the interface is down, bring it up */
965
{
966
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
967
if(sd < 0) {
968
perror("socket");
969
exitcode = EXIT_FAILURE;
970
goto end;
971
}
972
strcpy(network.ifr_name, interface); /* Spurious warning */
973
ret = ioctl(sd, SIOCGIFFLAGS, &network);
974
if(ret == -1){
975
perror("ioctl SIOCGIFFLAGS");
976
exitcode = EXIT_FAILURE;
977
goto end;
978
}
979
if((network.ifr_flags & IFF_UP) == 0){
980
network.ifr_flags |= IFF_UP;
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
{
1442
AvahiServerConfig config;
1443
/* Do not publish any local Zeroconf records */
1444
avahi_server_config_init(&config);
1445
config.publish_hinfo = 0;
1446
config.publish_addresses = 0;
1447
config.publish_workstation = 0;
1448
config.publish_domain = 0;
1449
1450
/* Allocate a new server */
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 */
1456
avahi_server_config_free(&config);
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 */
981
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
982
1535
if(ret == -1){
983
1536
perror("ioctl SIOCSIFFLAGS");
984
exitcode = EXIT_FAILURE;
985
goto end;
986
}
987
}
988
close(sd);
989
}
990
991
if (not debug){
992
avahi_set_log_function(empty_log);
993
}
994
995
/* Initialize the pseudo-RNG for Avahi */
996
srand((unsigned int) time(NULL));
997
998
/* Allocate main Avahi loop object */
999
mc.simple_poll = avahi_simple_poll_new();
1000
if (mc.simple_poll == NULL) {
1001
fprintf(stderr, "Avahi: Failed to create simple poll"
1002
" object.\n");
1003
exitcode = EXIT_FAILURE;
1004
goto end;
1005
}
1006
1007
{
1008
AvahiServerConfig config;
1009
/* Do not publish any local Zeroconf records */
1010
avahi_server_config_init(&config);
1011
config.publish_hinfo = 0;
1012
config.publish_addresses = 0;
1013
config.publish_workstation = 0;
1014
config.publish_domain = 0;
1015
1016
/* Allocate a new server */
1017
mc.server = avahi_server_new(avahi_simple_poll_get
1018
(mc.simple_poll), &config, NULL,
1019
NULL, &error);
1020
1021
/* Free the Avahi configuration data */
1022
avahi_server_config_free(&config);
1023
}
1024
1025
/* Check if creating the Avahi server object succeeded */
1026
if (mc.server == NULL) {
1027
fprintf(stderr, "Failed to create Avahi server: %s\n",
1028
avahi_strerror(error));
1029
exitcode = EXIT_FAILURE;
1030
goto end;
1031
}
1032
1033
/* Create the Avahi service browser */
1034
sb = avahi_s_service_browser_new(mc.server, if_index,
1035
AVAHI_PROTO_INET6,
1036
"_mandos._tcp", NULL, 0,
1037
browse_callback, &mc);
1038
if (sb == NULL) {
1039
fprintf(stderr, "Failed to create service browser: %s\n",
1040
avahi_strerror(avahi_server_errno(mc.server)));
1041
exitcode = EXIT_FAILURE;
1042
goto end;
1043
}
1044
1045
/* Run the main loop */
1046
1047
if (debug){
1048
fprintf(stderr, "Starting Avahi loop search\n");
1049
}
1050
1051
avahi_simple_poll_loop(mc.simple_poll);
1052
1053
end:
1054
1055
if (debug){
1056
fprintf(stderr, "%s exiting\n", argv[0]);
1057
}
1058
1059
/* Cleanup things */
1060
if (sb != NULL)
1061
avahi_s_service_browser_free(sb);
1062
1063
if (mc.server != NULL)
1064
avahi_server_free(mc.server);
1065
1066
if (mc.simple_poll != NULL)
1067
avahi_simple_poll_free(mc.simple_poll);
1068
free(pubkeyfile);
1069
free(seckeyfile);
1070
1071
if (gnutls_initalized){
1072
gnutls_certificate_free_credentials (mc.cred);
1073
gnutls_global_deinit ();
1074
}
1075
1076
return exitcode;
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;
1077
1616
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0