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- Committer: Teddy Hogeborn
- Date: 2009-12-25 23:13:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20091225231347-gg9u9ru0wj0f24hh
More consistent terminology: Clients are no longer "invalid" - they
are "disabled". All code and documentation changed to reflect this.
D=Bus API change: The "properties" argument was removed from the
"ClientAdded" signal on interface "se.bsnet.fukt.Mandos". All code in
both "mandos" and "mandos-monitor" changed to reflect this.
* mandos: Replaced "with closing(F)" with simply "with F" in all
places where F is a file object.
(Client.still_valid): Removed. All callers changed to look at
"Client.enabled" instead.
(dbus_service_property): Check for unsupported signatures with the
"byte_arrays" option.
(DBusObjectWithProperties.Set): - '' -
(ClientHandler.handle): Use the reverse pipe to receive the
"Client.enabled" attribute instead of the
now-removed "Client.still_valid()" method.
(ForkingMixInWithPipe): Renamed to "ForkingMixInWithPipes" (all
users changed). Now also create a reverse
pipe for sending data to the child process.
(ForkingMixInWithPipes.add_pipe): Now takes two pipe fd's as
arguments. All callers changed.
(IPv6_TCPServer.handle_ipc): Take an additional "reply_fd" argument
(all callers changed). Close the reply
pipe when the child data pipe is
closed. New "GETATTR" IPC method; will
pickle client attribute and send it
over the reply pipe FD.
(MandosDBusService.ClientAdded): Removed "properties" argument. All
emitters changed.
* mandos-clients.conf.xml (DESCRIPTION, OPTIONS): Use
"enabled/disabled"
terminology.
* mandos-ctl: Option "--is-valid" renamed to "--is-enabled".
* mandos-monitor: Enable user locale. Try to log exceptions.
(MandosClientPropertyCache.__init__): Removed "properties" argument.
All callers changed.
(UserInterface.add_new_client): Remove "properties" argument. All
callers changed. Supply "logger"
argument to MandosClientWidget().
(UserInterface.add_client): New "logger" argument. All callers
changed.
* mandos.xml (BUGS, SECURITY/CLIENTS): Use "enabled/disabled"
terminology.
are "disabled". All code and documentation changed to reflect this.
D=Bus API change: The "properties" argument was removed from the
"ClientAdded" signal on interface "se.bsnet.fukt.Mandos". All code in
both "mandos" and "mandos-monitor" changed to reflect this.
* mandos: Replaced "with closing(F)" with simply "with F" in all
places where F is a file object.
(Client.still_valid): Removed. All callers changed to look at
"Client.enabled" instead.
(dbus_service_property): Check for unsupported signatures with the
"byte_arrays" option.
(DBusObjectWithProperties.Set): - '' -
(ClientHandler.handle): Use the reverse pipe to receive the
"Client.enabled" attribute instead of the
now-removed "Client.still_valid()" method.
(ForkingMixInWithPipe): Renamed to "ForkingMixInWithPipes" (all
users changed). Now also create a reverse
pipe for sending data to the child process.
(ForkingMixInWithPipes.add_pipe): Now takes two pipe fd's as
arguments. All callers changed.
(IPv6_TCPServer.handle_ipc): Take an additional "reply_fd" argument
(all callers changed). Close the reply
pipe when the child data pipe is
closed. New "GETATTR" IPC method; will
pickle client attribute and send it
over the reply pipe FD.
(MandosDBusService.ClientAdded): Removed "properties" argument. All
emitters changed.
* mandos-clients.conf.xml (DESCRIPTION, OPTIONS): Use
"enabled/disabled"
terminology.
* mandos-ctl: Option "--is-valid" renamed to "--is-enabled".
* mandos-monitor: Enable user locale. Try to log exceptions.
(MandosClientPropertyCache.__init__): Removed "properties" argument.
All callers changed.
(UserInterface.add_new_client): Remove "properties" argument. All
callers changed. Supply "logger"
argument to MandosClientWidget().
(UserInterface.add_client): New "logger" argument. All callers
changed.
* mandos.xml (BUGS, SECURITY/CLIENTS): Use "enabled/disabled"
terminology.
- files added:
- NEWS
- debian/po
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
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
38
#endif
34
39
35
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
36
41
37
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
38
stdout, ferror() */
43
stdout, ferror(), remove() */
39
44
#include <stdint.h> /* uint16_t, uint32_t */
40
45
#include <stddef.h> /* NULL, size_t, ssize_t */
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
44
49
#include <string.h> /* memset(), strcmp(), strlen(),
45
50
strerror(), asprintf(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
47
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
48
53
sockaddr_in6, PF_INET6,
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
51
56
#include <sys/stat.h> /* open() */
52
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
53
struct in6_addr, inet_pton(),
54
connect() */
58
inet_pton(), connect() */
55
59
#include <fcntl.h> /* open() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
58
64
#include <assert.h> /* assert() */
59
65
#include <errno.h> /* perror(), errno */
60
#include <time.h> /* time() */
66
#include <time.h> /* nanosleep(), time() */
61
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
62
68
SIOCSIFFLAGS, if_indextoname(),
63
69
if_nametoindex(), IF_NAMESIZE */
64
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
65
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
66
getuid(), getgid(), setuid(),
67
setgid() */
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
68
76
#include <arpa/inet.h> /* inet_pton(), htons */
69
#include <iso646.h> /* not, and */
77
#include <iso646.h> /* not, or, and */
70
78
#include <argp.h> /* struct argp_option, error_t, struct
71
79
argp_state, struct argp,
72
80
argp_parse(), ARGP_KEY_ARG,
73
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
88
#ifdef __linux__
89
#include <sys/klog.h> /* klogctl() */
90
#endif /* __linux__ */
74
91
75
92
/* Avahi */
76
93
/* All Avahi types, constants and functions
89
106
gnutls_*
90
107
init_gnutls_session(),
91
108
GNUTLS_* */
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
109
#include <gnutls/openpgp.h>
110
/* gnutls_certificate_set_openpgp_key_file(),
93
111
GNUTLS_OPENPGP_FMT_BASE64 */
94
112
95
113
/* GPGME */
101
119
102
120
#define BUFFER_SIZE 256
103
121
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
108
122
#define PATHDIR "/conf/conf.d/mandos"
109
123
#define SECKEY "seckey.txt"
110
124
#define PUBKEY "pubkey.txt"
111
125
112
126
bool debug = false;
113
127
static const char mandos_protocol_version[] = "1";
114
const char *argp_program_version = "mandos-client 1.0";
128
const char *argp_program_version = "mandos-client " VERSION;
115
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
116
130
117
131
/* Used for passing in values through the Avahi callback functions */
125
139
gpgme_ctx_t ctx;
126
140
} mandos_context;
127
141
142
/* global context so signal handler can reach it*/
143
mandos_context mc = { .simple_poll = NULL, .server = NULL,
144
.dh_bits = 1024, .priority = "SECURE256"
145
":!CTYPE-X.509:+CTYPE-OPENPGP" };
146
147
sig_atomic_t quit_now = 0;
148
int signal_received = 0;
149
128
150
/*
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
151
* Make additional room in "buffer" for at least BUFFER_SIZE more
152
* bytes. "buffer_capacity" is how much is currently allocated,
131
153
* "buffer_length" is how much is already used.
132
154
*/
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
155
size_t incbuffer(char **buffer, size_t buffer_length,
134
156
size_t buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
157
if(buffer_length + BUFFER_SIZE > buffer_capacity){
136
158
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
137
if (buffer == NULL){
159
if(buffer == NULL){
138
160
return 0;
139
161
}
140
162
buffer_capacity += BUFFER_SIZE;
145
167
/*
146
168
* Initialize GPGME.
147
169
*/
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
170
static bool init_gpgme(const char *seckey,
149
171
const char *pubkey, const char *tempdir){
150
int ret;
151
172
gpgme_error_t rc;
152
173
gpgme_engine_info_t engine_info;
153
174
154
175
155
176
/*
156
* Helper function to insert pub and seckey to the enigne keyring.
177
* Helper function to insert pub and seckey to the engine keyring.
157
178
*/
158
179
bool import_key(const char *filename){
180
int ret;
159
181
int fd;
160
182
gpgme_data_t pgp_data;
161
183
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
184
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
163
185
if(fd == -1){
164
186
perror("open");
165
187
return false;
166
188
}
167
189
168
190
rc = gpgme_data_new_from_fd(&pgp_data, fd);
169
if (rc != GPG_ERR_NO_ERROR){
191
if(rc != GPG_ERR_NO_ERROR){
170
192
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
171
193
gpgme_strsource(rc), gpgme_strerror(rc));
172
194
return false;
173
195
}
174
196
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
197
rc = gpgme_op_import(mc.ctx, pgp_data);
198
if(rc != GPG_ERR_NO_ERROR){
177
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
178
200
gpgme_strsource(rc), gpgme_strerror(rc));
179
201
return false;
180
202
}
181
203
182
ret = TEMP_FAILURE_RETRY(close(fd));
204
ret = (int)TEMP_FAILURE_RETRY(close(fd));
183
205
if(ret == -1){
184
206
perror("close");
185
207
}
187
209
return true;
188
210
}
189
211
190
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
212
if(debug){
213
fprintf(stderr, "Initializing GPGME\n");
192
214
}
193
215
194
216
/* Init GPGME */
195
217
gpgme_check_version(NULL);
196
218
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
197
if (rc != GPG_ERR_NO_ERROR){
219
if(rc != GPG_ERR_NO_ERROR){
198
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
199
221
gpgme_strsource(rc), gpgme_strerror(rc));
200
222
return false;
201
223
}
202
224
203
225
/* Set GPGME home directory for the OpenPGP engine only */
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
226
rc = gpgme_get_engine_info(&engine_info);
227
if(rc != GPG_ERR_NO_ERROR){
206
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
207
229
gpgme_strsource(rc), gpgme_strerror(rc));
208
230
return false;
221
243
}
222
244
223
245
/* Create new GPGME "context" */
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
246
rc = gpgme_new(&(mc.ctx));
247
if(rc != GPG_ERR_NO_ERROR){
226
248
fprintf(stderr, "bad gpgme_new: %s: %s\n",
227
249
gpgme_strsource(rc), gpgme_strerror(rc));
228
250
return false;
229
251
}
230
252
231
if (not import_key(pubkey) or not import_key(seckey)){
253
if(not import_key(pubkey) or not import_key(seckey)){
232
254
return false;
233
255
}
234
256
235
return true;
257
return true;
236
258
}
237
259
238
260
/*
239
261
* Decrypt OpenPGP data.
240
262
* Returns -1 on error
241
263
*/
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
264
static ssize_t pgp_packet_decrypt(const char *cryptotext,
265
size_t crypto_size,
266
char **plaintext){
246
267
gpgme_data_t dh_crypto, dh_plain;
247
268
gpgme_error_t rc;
248
269
ssize_t ret;
249
270
size_t plaintext_capacity = 0;
250
271
ssize_t plaintext_length = 0;
251
272
252
if (debug){
273
if(debug){
253
274
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
254
275
}
255
276
256
277
/* Create new GPGME data buffer from memory cryptotext */
257
278
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
258
279
0);
259
if (rc != GPG_ERR_NO_ERROR){
280
if(rc != GPG_ERR_NO_ERROR){
260
281
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
261
282
gpgme_strsource(rc), gpgme_strerror(rc));
262
283
return -1;
264
285
265
286
/* Create new empty GPGME data buffer for the plaintext */
266
287
rc = gpgme_data_new(&dh_plain);
267
if (rc != GPG_ERR_NO_ERROR){
288
if(rc != GPG_ERR_NO_ERROR){
268
289
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
269
290
gpgme_strsource(rc), gpgme_strerror(rc));
270
291
gpgme_data_release(dh_crypto);
273
294
274
295
/* Decrypt data from the cryptotext data buffer to the plaintext
275
296
data buffer */
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
297
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
298
if(rc != GPG_ERR_NO_ERROR){
278
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
279
300
gpgme_strsource(rc), gpgme_strerror(rc));
280
301
plaintext_length = -1;
281
if (debug){
302
if(debug){
282
303
gpgme_decrypt_result_t result;
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
304
result = gpgme_op_decrypt_result(mc.ctx);
305
if(result == NULL){
285
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
286
307
} else {
287
308
fprintf(stderr, "Unsupported algorithm: %s\n",
293
314
}
294
315
gpgme_recipient_t recipient;
295
316
recipient = result->recipients;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
317
while(recipient != NULL){
318
fprintf(stderr, "Public key algorithm: %s\n",
319
gpgme_pubkey_algo_name(recipient->pubkey_algo));
320
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
321
fprintf(stderr, "Secret key available: %s\n",
322
recipient->status == GPG_ERR_NO_SECKEY
323
? "No" : "Yes");
324
recipient = recipient->next;
306
325
}
307
326
}
308
327
}
314
333
}
315
334
316
335
/* Seek back to the beginning of the GPGME plaintext data buffer */
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
336
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
318
337
perror("gpgme_data_seek");
319
338
plaintext_length = -1;
320
339
goto decrypt_end;
322
341
323
342
*plaintext = NULL;
324
343
while(true){
325
plaintext_capacity = adjustbuffer(plaintext,
344
plaintext_capacity = incbuffer(plaintext,
326
345
(size_t)plaintext_length,
327
346
plaintext_capacity);
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
347
if(plaintext_capacity == 0){
348
perror("incbuffer");
330
349
plaintext_length = -1;
331
350
goto decrypt_end;
332
351
}
334
353
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
335
354
BUFFER_SIZE);
336
355
/* Print the data, if any */
337
if (ret == 0){
356
if(ret == 0){
338
357
/* EOF */
339
358
break;
340
359
}
364
383
return plaintext_length;
365
384
}
366
385
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
386
static const char * safer_gnutls_strerror(int value){
387
const char *ret = gnutls_strerror(value); /* Spurious warning from
388
-Wunreachable-code */
389
if(ret == NULL)
370
390
ret = "(unknown)";
371
391
return ret;
372
392
}
377
397
fprintf(stderr, "GnuTLS: %s", string);
378
398
}
379
399
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
400
static int init_gnutls_global(const char *pubkeyfilename,
382
401
const char *seckeyfilename){
383
402
int ret;
384
403
387
406
}
388
407
389
408
ret = gnutls_global_init();
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
409
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS global_init: %s\n",
411
safer_gnutls_strerror(ret));
393
412
return -1;
394
413
}
395
414
396
if (debug){
415
if(debug){
397
416
/* "Use a log level over 10 to enable all debugging options."
398
417
* - GnuTLS manual
399
418
*/
402
421
}
403
422
404
423
/* OpenPGP credentials */
405
gnutls_certificate_allocate_credentials(&mc->cred);
406
if (ret != GNUTLS_E_SUCCESS){
407
fprintf (stderr, "GnuTLS memory error: %s\n", /* Spurious
408
warning */
409
safer_gnutls_strerror(ret));
410
gnutls_global_deinit ();
424
gnutls_certificate_allocate_credentials(&mc.cred);
425
if(ret != GNUTLS_E_SUCCESS){
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
427
from
428
-Wunreachable-code
429
*/
430
safer_gnutls_strerror(ret));
431
gnutls_global_deinit();
411
432
return -1;
412
433
}
413
434
418
439
}
419
440
420
441
ret = gnutls_certificate_set_openpgp_key_file
421
(mc->cred, pubkeyfilename, seckeyfilename,
442
(mc.cred, pubkeyfilename, seckeyfilename,
422
443
GNUTLS_OPENPGP_FMT_BASE64);
423
if (ret != GNUTLS_E_SUCCESS) {
444
if(ret != GNUTLS_E_SUCCESS){
424
445
fprintf(stderr,
425
446
"Error[%d] while reading the OpenPGP key pair ('%s',"
426
447
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
430
451
}
431
452
432
453
/* GnuTLS server initialization */
433
ret = gnutls_dh_params_init(&mc->dh_params);
434
if (ret != GNUTLS_E_SUCCESS) {
435
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
436
" %s\n", safer_gnutls_strerror(ret));
454
ret = gnutls_dh_params_init(&mc.dh_params);
455
if(ret != GNUTLS_E_SUCCESS){
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
457
" %s\n", safer_gnutls_strerror(ret));
437
458
goto globalfail;
438
459
}
439
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
440
if (ret != GNUTLS_E_SUCCESS) {
441
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
442
safer_gnutls_strerror(ret));
460
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
461
if(ret != GNUTLS_E_SUCCESS){
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
463
safer_gnutls_strerror(ret));
443
464
goto globalfail;
444
465
}
445
466
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
467
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
447
468
448
469
return 0;
449
470
450
471
globalfail:
451
472
452
gnutls_certificate_free_credentials(mc->cred);
473
gnutls_certificate_free_credentials(mc.cred);
453
474
gnutls_global_deinit();
454
gnutls_dh_params_deinit(mc->dh_params);
475
gnutls_dh_params_deinit(mc.dh_params);
455
476
return -1;
456
477
}
457
478
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
479
static int init_gnutls_session(gnutls_session_t *session){
460
480
int ret;
461
481
/* GnuTLS session creation */
462
ret = gnutls_init(session, GNUTLS_SERVER);
463
if (ret != GNUTLS_E_SUCCESS){
482
do {
483
ret = gnutls_init(session, GNUTLS_SERVER);
484
if(quit_now){
485
return -1;
486
}
487
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
488
if(ret != GNUTLS_E_SUCCESS){
464
489
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
465
490
safer_gnutls_strerror(ret));
466
491
}
467
492
468
493
{
469
494
const char *err;
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
495
do {
496
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
497
if(quit_now){
498
gnutls_deinit(*session);
499
return -1;
500
}
501
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
502
if(ret != GNUTLS_E_SUCCESS){
472
503
fprintf(stderr, "Syntax error at: %s\n", err);
473
504
fprintf(stderr, "GnuTLS error: %s\n",
474
505
safer_gnutls_strerror(ret));
475
gnutls_deinit (*session);
506
gnutls_deinit(*session);
476
507
return -1;
477
508
}
478
509
}
479
510
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
511
do {
512
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
513
mc.cred);
514
if(quit_now){
515
gnutls_deinit(*session);
516
return -1;
517
}
518
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
519
if(ret != GNUTLS_E_SUCCESS){
483
520
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
484
521
safer_gnutls_strerror(ret));
485
gnutls_deinit (*session);
522
gnutls_deinit(*session);
486
523
return -1;
487
524
}
488
525
489
526
/* ignore client certificate if any. */
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
527
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
492
528
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
529
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
494
530
495
531
return 0;
496
532
}
502
538
/* Called when a Mandos server is found */
503
539
static int start_mandos_communication(const char *ip, uint16_t port,
504
540
AvahiIfIndex if_index,
505
mandos_context *mc){
506
int ret, tcp_sd;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
541
int af){
542
int ret, tcp_sd = -1;
543
ssize_t sret;
544
union {
545
struct sockaddr_in in;
546
struct sockaddr_in6 in6;
547
} to;
508
548
char *buffer = NULL;
509
char *decrypted_buffer;
549
char *decrypted_buffer = NULL;
510
550
size_t buffer_length = 0;
511
551
size_t buffer_capacity = 0;
512
ssize_t decrypted_buffer_size;
513
552
size_t written;
514
int retval = 0;
515
char interface[IF_NAMESIZE];
553
int retval = -1;
516
554
gnutls_session_t session;
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
555
int pf; /* Protocol family */
556
557
errno = 0;
558
559
if(quit_now){
560
errno = EINTR;
561
return -1;
562
}
563
564
switch(af){
565
case AF_INET6:
566
pf = PF_INET6;
567
break;
568
case AF_INET:
569
pf = PF_INET;
570
break;
571
default:
572
fprintf(stderr, "Bad address family: %d\n", af);
573
errno = EINVAL;
574
return -1;
575
}
576
577
ret = init_gnutls_session(&session);
578
if(ret != 0){
520
579
return -1;
521
580
}
522
581
523
582
if(debug){
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
583
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
525
584
"\n", ip, port);
526
585
}
527
586
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
587
tcp_sd = socket(pf, SOCK_STREAM, 0);
588
if(tcp_sd < 0){
589
int e = errno;
530
590
perror("socket");
531
return -1;
591
errno = e;
592
goto mandos_end;
532
593
}
533
594
534
if(debug){
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
perror("if_indextoname");
537
return -1;
538
}
539
fprintf(stderr, "Binding to interface %s\n", interface);
595
if(quit_now){
596
errno = EINTR;
597
goto mandos_end;
540
598
}
541
599
542
600
memset(&to, 0, sizeof(to));
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
547
if (ret < 0 ){
601
if(af == AF_INET6){
602
to.in6.sin6_family = (sa_family_t)af;
603
ret = inet_pton(af, ip, &to.in6.sin6_addr);
604
} else { /* IPv4 */
605
to.in.sin_family = (sa_family_t)af;
606
ret = inet_pton(af, ip, &to.in.sin_addr);
607
}
608
if(ret < 0 ){
609
int e = errno;
548
610
perror("inet_pton");
549
return -1;
611
errno = e;
612
goto mandos_end;
550
613
}
551
614
if(ret == 0){
615
int e = errno;
552
616
fprintf(stderr, "Bad address: %s\n", ip);
553
return -1;
554
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
617
errno = e;
618
goto mandos_end;
619
}
620
if(af == AF_INET6){
621
to.in6.sin6_port = htons(port); /* Spurious warnings from
622
-Wconversion and
623
-Wunreachable-code */
624
625
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
626
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
627
-Wunreachable-code*/
628
if(if_index == AVAHI_IF_UNSPEC){
629
fprintf(stderr, "An IPv6 link-local address is incomplete"
630
" without a network interface\n");
631
errno = EINVAL;
632
goto mandos_end;
633
}
634
/* Set the network interface number as scope */
635
to.in6.sin6_scope_id = (uint32_t)if_index;
636
}
637
} else {
638
to.in.sin_port = htons(port); /* Spurious warnings from
639
-Wconversion and
640
-Wunreachable-code */
641
}
556
642
557
to.in6.sin6_scope_id = (uint32_t)if_index;
643
if(quit_now){
644
errno = EINTR;
645
goto mandos_end;
646
}
558
647
559
648
if(debug){
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
561
port);
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
649
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
650
char interface[IF_NAMESIZE];
651
if(if_indextoname((unsigned int)if_index, interface) == NULL){
652
perror("if_indextoname");
653
} else {
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
655
ip, interface, port);
656
}
657
} else {
658
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
659
port);
660
}
661
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
662
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
663
const char *pcret;
664
if(af == AF_INET6){
665
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
666
sizeof(addrstr));
667
} else {
668
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
669
sizeof(addrstr));
670
}
671
if(pcret == NULL){
565
672
perror("inet_ntop");
566
673
} else {
567
674
if(strcmp(addrstr, ip) != 0){
570
677
}
571
678
}
572
679
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
680
if(quit_now){
681
errno = EINTR;
682
goto mandos_end;
683
}
684
685
if(af == AF_INET6){
686
ret = connect(tcp_sd, &to.in6, sizeof(to));
687
} else {
688
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
}
690
if(ret < 0){
691
int e = errno;
575
692
perror("connect");
576
return -1;
693
errno = e;
694
goto mandos_end;
695
}
696
697
if(quit_now){
698
errno = EINTR;
699
goto mandos_end;
577
700
}
578
701
579
702
const char *out = mandos_protocol_version;
580
703
written = 0;
581
while (true){
704
while(true){
582
705
size_t out_size = strlen(out);
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
706
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
707
out_size - written));
585
if (ret == -1){
708
if(ret == -1){
709
int e = errno;
586
710
perror("write");
587
retval = -1;
711
errno = e;
588
712
goto mandos_end;
589
713
}
590
714
written += (size_t)ret;
591
715
if(written < out_size){
592
716
continue;
593
717
} else {
594
if (out == mandos_protocol_version){
718
if(out == mandos_protocol_version){
595
719
written = 0;
596
720
out = "\r\n";
597
721
} else {
598
722
break;
599
723
}
600
724
}
725
726
if(quit_now){
727
errno = EINTR;
728
goto mandos_end;
729
}
601
730
}
602
731
603
732
if(debug){
604
733
fprintf(stderr, "Establishing TLS session with %s\n", ip);
605
734
}
606
735
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
608
609
do{
610
ret = gnutls_handshake (session);
736
if(quit_now){
737
errno = EINTR;
738
goto mandos_end;
739
}
740
741
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
742
743
if(quit_now){
744
errno = EINTR;
745
goto mandos_end;
746
}
747
748
do {
749
ret = gnutls_handshake(session);
750
if(quit_now){
751
errno = EINTR;
752
goto mandos_end;
753
}
611
754
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
612
755
613
if (ret != GNUTLS_E_SUCCESS){
756
if(ret != GNUTLS_E_SUCCESS){
614
757
if(debug){
615
758
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
616
gnutls_perror (ret);
759
gnutls_perror(ret);
617
760
}
618
retval = -1;
761
errno = EPROTO;
619
762
goto mandos_end;
620
763
}
621
764
622
765
/* Read OpenPGP packet that contains the wanted password */
623
766
624
767
if(debug){
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
768
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
626
769
ip);
627
770
}
628
771
629
772
while(true){
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
773
774
if(quit_now){
775
errno = EINTR;
776
goto mandos_end;
777
}
778
779
buffer_capacity = incbuffer(&buffer, buffer_length,
631
780
buffer_capacity);
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
634
retval = -1;
635
goto mandos_end;
636
}
637
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
781
if(buffer_capacity == 0){
782
int e = errno;
783
perror("incbuffer");
784
errno = e;
785
goto mandos_end;
786
}
787
788
if(quit_now){
789
errno = EINTR;
790
goto mandos_end;
791
}
792
793
sret = gnutls_record_recv(session, buffer+buffer_length,
794
BUFFER_SIZE);
795
if(sret == 0){
641
796
break;
642
797
}
643
if (ret < 0){
644
switch(ret){
798
if(sret < 0){
799
switch(sret){
645
800
case GNUTLS_E_INTERRUPTED:
646
801
case GNUTLS_E_AGAIN:
647
802
break;
648
803
case GNUTLS_E_REHANDSHAKE:
649
do{
650
ret = gnutls_handshake (session);
804
do {
805
ret = gnutls_handshake(session);
806
807
if(quit_now){
808
errno = EINTR;
809
goto mandos_end;
810
}
651
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
652
if (ret < 0){
812
if(ret < 0){
653
813
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
654
gnutls_perror (ret);
655
retval = -1;
814
gnutls_perror(ret);
815
errno = EPROTO;
656
816
goto mandos_end;
657
817
}
658
818
break;
659
819
default:
660
820
fprintf(stderr, "Unknown error while reading data from"
661
821
" encrypted session with Mandos server\n");
662
retval = -1;
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
822
gnutls_bye(session, GNUTLS_SHUT_RDWR);
823
errno = EIO;
664
824
goto mandos_end;
665
825
}
666
826
} else {
667
buffer_length += (size_t) ret;
827
buffer_length += (size_t) sret;
668
828
}
669
829
}
670
830
672
832
fprintf(stderr, "Closing TLS session\n");
673
833
}
674
834
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
676
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
835
if(quit_now){
836
errno = EINTR;
837
goto mandos_end;
838
}
839
840
do {
841
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
842
if(quit_now){
843
errno = EINTR;
844
goto mandos_end;
845
}
846
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
847
848
if(buffer_length > 0){
849
ssize_t decrypted_buffer_size;
850
decrypted_buffer_size = pgp_packet_decrypt(buffer,
679
851
buffer_length,
680
852
&decrypted_buffer);
681
if (decrypted_buffer_size >= 0){
853
if(decrypted_buffer_size >= 0){
854
682
855
written = 0;
683
856
while(written < (size_t) decrypted_buffer_size){
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
857
if(quit_now){
858
errno = EINTR;
859
goto mandos_end;
860
}
861
862
ret = (int)fwrite(decrypted_buffer + written, 1,
863
(size_t)decrypted_buffer_size - written,
864
stdout);
687
865
if(ret == 0 and ferror(stdout)){
866
int e = errno;
688
867
if(debug){
689
868
fprintf(stderr, "Error writing encrypted data: %s\n",
690
869
strerror(errno));
691
870
}
692
retval = -1;
693
break;
871
errno = e;
872
goto mandos_end;
694
873
}
695
874
written += (size_t)ret;
696
875
}
697
free(decrypted_buffer);
698
} else {
699
retval = -1;
876
retval = 0;
700
877
}
701
} else {
702
retval = -1;
703
878
}
704
879
705
880
/* Shutdown procedure */
706
881
707
882
mandos_end:
708
free(buffer);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
710
if(ret == -1){
711
perror("close");
883
{
884
int e = errno;
885
free(decrypted_buffer);
886
free(buffer);
887
if(tcp_sd >= 0){
888
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
889
}
890
if(ret == -1){
891
if(e == 0){
892
e = errno;
893
}
894
perror("close");
895
}
896
gnutls_deinit(session);
897
if(quit_now){
898
e = EINTR;
899
retval = -1;
900
}
901
errno = e;
712
902
}
713
gnutls_deinit (session);
714
903
return retval;
715
904
}
716
905
717
906
static void resolve_callback(AvahiSServiceResolver *r,
718
907
AvahiIfIndex interface,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
908
AvahiProtocol proto,
720
909
AvahiResolverEvent event,
721
910
const char *name,
722
911
const char *type,
727
916
AVAHI_GCC_UNUSED AvahiStringList *txt,
728
917
AVAHI_GCC_UNUSED AvahiLookupResultFlags
729
918
flags,
730
void* userdata) {
731
mandos_context *mc = userdata;
919
AVAHI_GCC_UNUSED void* userdata){
732
920
assert(r);
733
921
734
922
/* Called whenever a service has been resolved successfully or
735
923
timed out */
736
924
737
switch (event) {
925
if(quit_now){
926
return;
927
}
928
929
switch(event){
738
930
default:
739
931
case AVAHI_RESOLVER_FAILURE:
740
932
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
741
933
" of type '%s' in domain '%s': %s\n", name, type, domain,
742
avahi_strerror(avahi_server_errno(mc->server)));
934
avahi_strerror(avahi_server_errno(mc.server)));
743
935
break;
744
936
745
937
case AVAHI_RESOLVER_FOUND:
748
940
avahi_address_snprint(ip, sizeof(ip), address);
749
941
if(debug){
750
942
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
943
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
944
ip, (intmax_t)interface, port);
753
945
}
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
946
int ret = start_mandos_communication(ip, port, interface,
947
avahi_proto_to_af(proto));
948
if(ret == 0){
949
avahi_simple_poll_quit(mc.simple_poll);
757
950
}
758
951
}
759
952
}
760
953
avahi_s_service_resolver_free(r);
761
954
}
762
955
763
static void browse_callback( AvahiSServiceBrowser *b,
764
AvahiIfIndex interface,
765
AvahiProtocol protocol,
766
AvahiBrowserEvent event,
767
const char *name,
768
const char *type,
769
const char *domain,
770
AVAHI_GCC_UNUSED AvahiLookupResultFlags
771
flags,
772
void* userdata) {
773
mandos_context *mc = userdata;
956
static void browse_callback(AvahiSServiceBrowser *b,
957
AvahiIfIndex interface,
958
AvahiProtocol protocol,
959
AvahiBrowserEvent event,
960
const char *name,
961
const char *type,
962
const char *domain,
963
AVAHI_GCC_UNUSED AvahiLookupResultFlags
964
flags,
965
AVAHI_GCC_UNUSED void* userdata){
774
966
assert(b);
775
967
776
968
/* Called whenever a new services becomes available on the LAN or
777
969
is removed from the LAN */
778
970
779
switch (event) {
971
if(quit_now){
972
return;
973
}
974
975
switch(event){
780
976
default:
781
977
case AVAHI_BROWSER_FAILURE:
782
978
783
979
fprintf(stderr, "(Avahi browser) %s\n",
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
980
avahi_strerror(avahi_server_errno(mc.server)));
981
avahi_simple_poll_quit(mc.simple_poll);
786
982
return;
787
983
788
984
case AVAHI_BROWSER_NEW:
791
987
the callback function is called the Avahi server will free the
792
988
resolver for us. */
793
989
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
795
protocol, name, type, domain,
796
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
990
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
991
name, type, domain, protocol, 0,
992
resolve_callback, NULL) == NULL)
798
993
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
799
name, avahi_strerror(avahi_server_errno(mc->server)));
994
name, avahi_strerror(avahi_server_errno(mc.server)));
800
995
break;
801
996
802
997
case AVAHI_BROWSER_REMOVE:
811
1006
}
812
1007
}
813
1008
1009
/* stop main loop after sigterm has been called */
1010
static void handle_sigterm(int sig){
1011
if(quit_now){
1012
return;
1013
}
1014
quit_now = 1;
1015
signal_received = sig;
1016
int old_errno = errno;
1017
if(mc.simple_poll != NULL){
1018
avahi_simple_poll_quit(mc.simple_poll);
1019
}
1020
errno = old_errno;
1021
}
1022
814
1023
int main(int argc, char *argv[]){
815
AvahiSServiceBrowser *sb = NULL;
816
int error;
817
int ret;
818
int exitcode = EXIT_SUCCESS;
819
const char *interface = "eth0";
820
struct ifreq network;
821
int sd;
822
uid_t uid;
823
gid_t gid;
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
829
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"
832
":!CTYPE-X.509:+CTYPE-OPENPGP" };
833
bool gnutls_initalized = false;
834
bool gpgme_initalized = false;
835
836
{
837
struct argp_option options[] = {
838
{ .name = "debug", .key = 128,
839
.doc = "Debug mode", .group = 3 },
840
{ .name = "connect", .key = 'c',
841
.arg = "ADDRESS:PORT",
842
.doc = "Connect directly to a specific Mandos server",
843
.group = 1 },
844
{ .name = "interface", .key = 'i',
845
.arg = "NAME",
846
.doc = "Interface that will be used to search for Mandos"
847
" servers",
848
.group = 1 },
849
{ .name = "seckey", .key = 's',
850
.arg = "FILE",
851
.doc = "OpenPGP secret key file base name",
852
.group = 1 },
853
{ .name = "pubkey", .key = 'p',
854
.arg = "FILE",
855
.doc = "OpenPGP public key file base name",
856
.group = 2 },
857
{ .name = "dh-bits", .key = 129,
858
.arg = "BITS",
859
.doc = "Bit length of the prime number used in the"
860
" Diffie-Hellman key exchange",
861
.group = 2 },
862
{ .name = "priority", .key = 130,
863
.arg = "STRING",
864
.doc = "GnuTLS priority string for the TLS handshake",
865
.group = 1 },
866
{ .name = NULL }
867
};
868
869
error_t parse_opt (int key, char *arg,
870
struct argp_state *state) {
871
/* Get the INPUT argument from `argp_parse', which we know is
872
a pointer to our plugin list pointer. */
873
switch (key) {
874
case 128: /* --debug */
875
debug = true;
876
break;
877
case 'c': /* --connect */
878
connect_to = arg;
879
break;
880
case 'i': /* --interface */
881
interface = arg;
882
break;
883
case 's': /* --seckey */
884
seckey = arg;
885
break;
886
case 'p': /* --pubkey */
887
pubkey = arg;
888
break;
889
case 129: /* --dh-bits */
890
errno = 0;
891
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
892
if (errno){
893
perror("strtol");
894
exit(EXIT_FAILURE);
895
}
896
break;
897
case 130: /* --priority */
898
mc.priority = arg;
899
break;
900
case ARGP_KEY_ARG:
901
argp_usage (state);
902
case ARGP_KEY_END:
903
break;
904
default:
905
return ARGP_ERR_UNKNOWN;
906
}
907
return 0;
908
}
909
910
struct argp argp = { .options = options, .parser = parse_opt,
911
.args_doc = "",
912
.doc = "Mandos client -- Get and decrypt"
913
" passwords from a Mandos server" };
914
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
915
if (ret == ARGP_ERR_UNKNOWN){
916
fprintf(stderr, "Unknown error while parsing arguments\n");
917
exitcode = EXIT_FAILURE;
918
goto end;
919
}
920
}
921
922
/* If the interface is down, bring it up */
923
{
924
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
925
if(sd < 0) {
926
perror("socket");
927
exitcode = EXIT_FAILURE;
928
goto end;
929
}
930
strcpy(network.ifr_name, interface);
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
932
if(ret == -1){
933
perror("ioctl SIOCGIFFLAGS");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
if((network.ifr_flags & IFF_UP) == 0){
938
network.ifr_flags |= IFF_UP;
939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
940
if(ret == -1){
941
perror("ioctl SIOCSIFFLAGS");
942
exitcode = EXIT_FAILURE;
943
goto end;
944
}
945
}
946
ret = TEMP_FAILURE_RETRY(close(sd));
947
if(ret == -1){
948
perror("close");
949
}
950
}
951
952
uid = getuid();
953
gid = getgid();
954
955
ret = setuid(uid);
956
if (ret == -1){
957
perror("setuid");
958
}
959
960
setgid(gid);
961
if (ret == -1){
962
perror("setgid");
963
}
964
965
ret = init_gnutls_global(&mc, pubkey, seckey);
966
if (ret == -1){
967
fprintf(stderr, "init_gnutls_global failed\n");
968
exitcode = EXIT_FAILURE;
969
goto end;
970
} else {
971
gnutls_initalized = true;
972
}
973
974
if(mkdtemp(tempdir) == NULL){
975
perror("mkdtemp");
976
tempdir[0] = '\0';
977
goto end;
978
}
979
980
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
981
fprintf(stderr, "gpgme_initalized failed\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
} else {
985
gpgme_initalized = true;
986
}
987
1024
AvahiSServiceBrowser *sb = NULL;
1025
int error;
1026
int ret;
1027
intmax_t tmpmax;
1028
char *tmp;
1029
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1031
struct ifreq network;
1032
int sd = -1;
1033
bool take_down_interface = false;
1034
uid_t uid;
1035
gid_t gid;
1036
char *connect_to = NULL;
1037
char tempdir[] = "/tmp/mandosXXXXXX";
1038
bool tempdir_created = false;
1039
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1040
const char *seckey = PATHDIR "/" SECKEY;
1041
const char *pubkey = PATHDIR "/" PUBKEY;
1042
1043
bool gnutls_initialized = false;
1044
bool gpgme_initialized = false;
1045
float delay = 2.5f;
1046
1047
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1048
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1049
1050
uid = getuid();
1051
gid = getgid();
1052
1053
/* Lower any group privileges we might have, just to be safe */
1054
errno = 0;
1055
ret = setgid(gid);
1056
if(ret == -1){
1057
perror("setgid");
1058
}
1059
1060
/* Lower user privileges (temporarily) */
1061
errno = 0;
1062
ret = seteuid(uid);
1063
if(ret == -1){
1064
perror("seteuid");
1065
}
1066
1067
if(quit_now){
1068
goto end;
1069
}
1070
1071
{
1072
struct argp_option options[] = {
1073
{ .name = "debug", .key = 128,
1074
.doc = "Debug mode", .group = 3 },
1075
{ .name = "connect", .key = 'c',
1076
.arg = "ADDRESS:PORT",
1077
.doc = "Connect directly to a specific Mandos server",
1078
.group = 1 },
1079
{ .name = "interface", .key = 'i',
1080
.arg = "NAME",
1081
.doc = "Network interface that will be used to search for"
1082
" Mandos servers",
1083
.group = 1 },
1084
{ .name = "seckey", .key = 's',
1085
.arg = "FILE",
1086
.doc = "OpenPGP secret key file base name",
1087
.group = 1 },
1088
{ .name = "pubkey", .key = 'p',
1089
.arg = "FILE",
1090
.doc = "OpenPGP public key file base name",
1091
.group = 2 },
1092
{ .name = "dh-bits", .key = 129,
1093
.arg = "BITS",
1094
.doc = "Bit length of the prime number used in the"
1095
" Diffie-Hellman key exchange",
1096
.group = 2 },
1097
{ .name = "priority", .key = 130,
1098
.arg = "STRING",
1099
.doc = "GnuTLS priority string for the TLS handshake",
1100
.group = 1 },
1101
{ .name = "delay", .key = 131,
1102
.arg = "SECONDS",
1103
.doc = "Maximum delay to wait for interface startup",
1104
.group = 2 },
1105
/*
1106
* These reproduce what we would get without ARGP_NO_HELP
1107
*/
1108
{ .name = "help", .key = '?',
1109
.doc = "Give this help list", .group = -1 },
1110
{ .name = "usage", .key = -3,
1111
.doc = "Give a short usage message", .group = -1 },
1112
{ .name = "version", .key = 'V',
1113
.doc = "Print program version", .group = -1 },
1114
{ .name = NULL }
1115
};
1116
1117
error_t parse_opt(int key, char *arg,
1118
struct argp_state *state){
1119
errno = 0;
1120
switch(key){
1121
case 128: /* --debug */
1122
debug = true;
1123
break;
1124
case 'c': /* --connect */
1125
connect_to = arg;
1126
break;
1127
case 'i': /* --interface */
1128
interface = arg;
1129
break;
1130
case 's': /* --seckey */
1131
seckey = arg;
1132
break;
1133
case 'p': /* --pubkey */
1134
pubkey = arg;
1135
break;
1136
case 129: /* --dh-bits */
1137
errno = 0;
1138
tmpmax = strtoimax(arg, &tmp, 10);
1139
if(errno != 0 or tmp == arg or *tmp != '\0'
1140
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1141
argp_error(state, "Bad number of DH bits");
1142
}
1143
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1144
break;
1145
case 130: /* --priority */
1146
mc.priority = arg;
1147
break;
1148
case 131: /* --delay */
1149
errno = 0;
1150
delay = strtof(arg, &tmp);
1151
if(errno != 0 or tmp == arg or *tmp != '\0'){
1152
argp_error(state, "Bad delay");
1153
}
1154
break;
1155
/*
1156
* These reproduce what we would get without ARGP_NO_HELP
1157
*/
1158
case '?': /* --help */
1159
argp_state_help(state, state->out_stream,
1160
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1161
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1162
case -3: /* --usage */
1163
argp_state_help(state, state->out_stream,
1164
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1165
case 'V': /* --version */
1166
fprintf(state->out_stream, "%s\n", argp_program_version);
1167
exit(argp_err_exit_status);
1168
break;
1169
default:
1170
return ARGP_ERR_UNKNOWN;
1171
}
1172
return errno;
1173
}
1174
1175
struct argp argp = { .options = options, .parser = parse_opt,
1176
.args_doc = "",
1177
.doc = "Mandos client -- Get and decrypt"
1178
" passwords from a Mandos server" };
1179
ret = argp_parse(&argp, argc, argv,
1180
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1181
switch(ret){
1182
case 0:
1183
break;
1184
case ENOMEM:
1185
default:
1186
errno = ret;
1187
perror("argp_parse");
1188
exitcode = EX_OSERR;
1189
goto end;
1190
case EINVAL:
1191
exitcode = EX_USAGE;
1192
goto end;
1193
}
1194
}
1195
1196
if(not debug){
1197
avahi_set_log_function(empty_log);
1198
}
1199
1200
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
from the signal handler */
1202
/* Initialize the pseudo-RNG for Avahi */
1203
srand((unsigned int) time(NULL));
1204
mc.simple_poll = avahi_simple_poll_new();
1205
if(mc.simple_poll == NULL){
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1207
exitcode = EX_UNAVAILABLE;
1208
goto end;
1209
}
1210
1211
sigemptyset(&sigterm_action.sa_mask);
1212
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1213
if(ret == -1){
1214
perror("sigaddset");
1215
exitcode = EX_OSERR;
1216
goto end;
1217
}
1218
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1219
if(ret == -1){
1220
perror("sigaddset");
1221
exitcode = EX_OSERR;
1222
goto end;
1223
}
1224
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1225
if(ret == -1){
1226
perror("sigaddset");
1227
exitcode = EX_OSERR;
1228
goto end;
1229
}
1230
/* Need to check if the handler is SIG_IGN before handling:
1231
| [[info:libc:Initial Signal Actions]] |
1232
| [[info:libc:Basic Signal Handling]] |
1233
*/
1234
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1235
if(ret == -1){
1236
perror("sigaction");
1237
return EX_OSERR;
1238
}
1239
if(old_sigterm_action.sa_handler != SIG_IGN){
1240
ret = sigaction(SIGINT, &sigterm_action, NULL);
1241
if(ret == -1){
1242
perror("sigaction");
1243
exitcode = EX_OSERR;
1244
goto end;
1245
}
1246
}
1247
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1248
if(ret == -1){
1249
perror("sigaction");
1250
return EX_OSERR;
1251
}
1252
if(old_sigterm_action.sa_handler != SIG_IGN){
1253
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1254
if(ret == -1){
1255
perror("sigaction");
1256
exitcode = EX_OSERR;
1257
goto end;
1258
}
1259
}
1260
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1261
if(ret == -1){
1262
perror("sigaction");
1263
return EX_OSERR;
1264
}
1265
if(old_sigterm_action.sa_handler != SIG_IGN){
1266
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1267
if(ret == -1){
1268
perror("sigaction");
1269
exitcode = EX_OSERR;
1270
goto end;
1271
}
1272
}
1273
1274
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
988
1276
if_index = (AvahiIfIndex) if_nametoindex(interface);
989
1277
if(if_index == 0){
990
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
991
exit(EXIT_FAILURE);
992
}
993
994
if(connect_to != NULL){
995
/* Connect directly, do not use Zeroconf */
996
/* (Mainly meant for debugging) */
997
char *address = strrchr(connect_to, ':');
998
if(address == NULL){
999
fprintf(stderr, "No colon in address\n");
1000
exitcode = EXIT_FAILURE;
1001
goto end;
1002
}
1003
errno = 0;
1004
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1005
if(errno){
1006
perror("Bad port number");
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
*address = '\0';
1011
address = connect_to;
1012
ret = start_mandos_communication(address, port, if_index, &mc);
1013
if(ret < 0){
1014
exitcode = EXIT_FAILURE;
1015
} else {
1016
exitcode = EXIT_SUCCESS;
1017
}
1018
goto end;
1019
}
1020
1021
if (not debug){
1022
avahi_set_log_function(empty_log);
1023
}
1024
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
1028
/* Allocate main Avahi loop object */
1029
mc.simple_poll = avahi_simple_poll_new();
1030
if (mc.simple_poll == NULL) {
1031
fprintf(stderr, "Avahi: Failed to create simple poll"
1032
" object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
{
1038
AvahiServerConfig config;
1039
/* Do not publish any local Zeroconf records */
1040
avahi_server_config_init(&config);
1041
config.publish_hinfo = 0;
1042
config.publish_addresses = 0;
1043
config.publish_workstation = 0;
1044
config.publish_domain = 0;
1045
1046
/* Allocate a new server */
1047
mc.server = avahi_server_new(avahi_simple_poll_get
1048
(mc.simple_poll), &config, NULL,
1049
NULL, &error);
1050
1051
/* Free the Avahi configuration data */
1052
avahi_server_config_free(&config);
1053
}
1054
1055
/* Check if creating the Avahi server object succeeded */
1056
if (mc.server == NULL) {
1057
fprintf(stderr, "Failed to create Avahi server: %s\n",
1058
avahi_strerror(error));
1059
exitcode = EXIT_FAILURE;
1060
goto end;
1061
}
1062
1063
/* Create the Avahi service browser */
1064
sb = avahi_s_service_browser_new(mc.server, if_index,
1065
AVAHI_PROTO_INET6,
1066
"_mandos._tcp", NULL, 0,
1067
browse_callback, &mc);
1068
if (sb == NULL) {
1069
fprintf(stderr, "Failed to create service browser: %s\n",
1070
avahi_strerror(avahi_server_errno(mc.server)));
1071
exitcode = EXIT_FAILURE;
1072
goto end;
1073
}
1074
1075
/* Run the main loop */
1076
1077
if (debug){
1078
fprintf(stderr, "Starting Avahi loop search\n");
1079
}
1080
1081
avahi_simple_poll_loop(mc.simple_poll);
1082
1279
exitcode = EX_UNAVAILABLE;
1280
goto end;
1281
}
1282
1283
if(quit_now){
1284
goto end;
1285
}
1286
1287
/* Re-raise priviliges */
1288
errno = 0;
1289
ret = seteuid(0);
1290
if(ret == -1){
1291
perror("seteuid");
1292
}
1293
1294
#ifdef __linux__
1295
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1296
messages about the network interface to mess up the prompt */
1297
ret = klogctl(8, NULL, 5);
1298
bool restore_loglevel = true;
1299
if(ret == -1){
1300
restore_loglevel = false;
1301
perror("klogctl");
1302
}
1303
#endif /* __linux__ */
1304
1305
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1306
if(sd < 0){
1307
perror("socket");
1308
exitcode = EX_OSERR;
1309
#ifdef __linux__
1310
if(restore_loglevel){
1311
ret = klogctl(7, NULL, 0);
1312
if(ret == -1){
1313
perror("klogctl");
1314
}
1315
}
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
1320
if(ret == -1){
1321
perror("seteuid");
1322
}
1323
goto end;
1324
}
1325
strcpy(network.ifr_name, interface);
1326
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1327
if(ret == -1){
1328
perror("ioctl SIOCGIFFLAGS");
1329
#ifdef __linux__
1330
if(restore_loglevel){
1331
ret = klogctl(7, NULL, 0);
1332
if(ret == -1){
1333
perror("klogctl");
1334
}
1335
}
1336
#endif /* __linux__ */
1337
exitcode = EX_OSERR;
1338
/* Lower privileges */
1339
errno = 0;
1340
ret = seteuid(uid);
1341
if(ret == -1){
1342
perror("seteuid");
1343
}
1344
goto end;
1345
}
1346
if((network.ifr_flags & IFF_UP) == 0){
1347
network.ifr_flags |= IFF_UP;
1348
take_down_interface = true;
1349
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
if(ret == -1){
1351
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1353
exitcode = EX_OSERR;
1354
#ifdef __linux__
1355
if(restore_loglevel){
1356
ret = klogctl(7, NULL, 0);
1357
if(ret == -1){
1358
perror("klogctl");
1359
}
1360
}
1361
#endif /* __linux__ */
1362
/* Lower privileges */
1363
errno = 0;
1364
ret = seteuid(uid);
1365
if(ret == -1){
1366
perror("seteuid");
1367
}
1368
goto end;
1369
}
1370
}
1371
/* sleep checking until interface is running */
1372
for(int i=0; i < delay * 4; i++){
1373
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1374
if(ret == -1){
1375
perror("ioctl SIOCGIFFLAGS");
1376
} else if(network.ifr_flags & IFF_RUNNING){
1377
break;
1378
}
1379
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
ret = nanosleep(&sleeptime, NULL);
1381
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
1383
}
1384
}
1385
if(not take_down_interface){
1386
/* We won't need the socket anymore */
1387
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1388
if(ret == -1){
1389
perror("close");
1390
}
1391
}
1392
#ifdef __linux__
1393
if(restore_loglevel){
1394
/* Restores kernel loglevel to default */
1395
ret = klogctl(7, NULL, 0);
1396
if(ret == -1){
1397
perror("klogctl");
1398
}
1399
}
1400
#endif /* __linux__ */
1401
/* Lower privileges */
1402
errno = 0;
1403
if(take_down_interface){
1404
/* Lower privileges */
1405
ret = seteuid(uid);
1406
if(ret == -1){
1407
perror("seteuid");
1408
}
1409
} else {
1410
/* Lower privileges permanently */
1411
ret = setuid(uid);
1412
if(ret == -1){
1413
perror("setuid");
1414
}
1415
}
1416
}
1417
1418
if(quit_now){
1419
goto end;
1420
}
1421
1422
ret = init_gnutls_global(pubkey, seckey);
1423
if(ret == -1){
1424
fprintf(stderr, "init_gnutls_global failed\n");
1425
exitcode = EX_UNAVAILABLE;
1426
goto end;
1427
} else {
1428
gnutls_initialized = true;
1429
}
1430
1431
if(quit_now){
1432
goto end;
1433
}
1434
1435
tempdir_created = true;
1436
if(mkdtemp(tempdir) == NULL){
1437
tempdir_created = false;
1438
perror("mkdtemp");
1439
goto end;
1440
}
1441
1442
if(quit_now){
1443
goto end;
1444
}
1445
1446
if(not init_gpgme(pubkey, seckey, tempdir)){
1447
fprintf(stderr, "init_gpgme failed\n");
1448
exitcode = EX_UNAVAILABLE;
1449
goto end;
1450
} else {
1451
gpgme_initialized = true;
1452
}
1453
1454
if(quit_now){
1455
goto end;
1456
}
1457
1458
if(connect_to != NULL){
1459
/* Connect directly, do not use Zeroconf */
1460
/* (Mainly meant for debugging) */
1461
char *address = strrchr(connect_to, ':');
1462
if(address == NULL){
1463
fprintf(stderr, "No colon in address\n");
1464
exitcode = EX_USAGE;
1465
goto end;
1466
}
1467
1468
if(quit_now){
1469
goto end;
1470
}
1471
1472
uint16_t port;
1473
errno = 0;
1474
tmpmax = strtoimax(address+1, &tmp, 10);
1475
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1476
or tmpmax != (uint16_t)tmpmax){
1477
fprintf(stderr, "Bad port number\n");
1478
exitcode = EX_USAGE;
1479
goto end;
1480
}
1481
1482
if(quit_now){
1483
goto end;
1484
}
1485
1486
port = (uint16_t)tmpmax;
1487
*address = '\0';
1488
address = connect_to;
1489
/* Colon in address indicates IPv6 */
1490
int af;
1491
if(strchr(address, ':') != NULL){
1492
af = AF_INET6;
1493
} else {
1494
af = AF_INET;
1495
}
1496
1497
if(quit_now){
1498
goto end;
1499
}
1500
1501
ret = start_mandos_communication(address, port, if_index, af);
1502
if(ret < 0){
1503
switch(errno){
1504
case ENETUNREACH:
1505
case EHOSTDOWN:
1506
case EHOSTUNREACH:
1507
exitcode = EX_NOHOST;
1508
break;
1509
case EINVAL:
1510
exitcode = EX_USAGE;
1511
break;
1512
case EIO:
1513
exitcode = EX_IOERR;
1514
break;
1515
case EPROTO:
1516
exitcode = EX_PROTOCOL;
1517
break;
1518
default:
1519
exitcode = EX_OSERR;
1520
break;
1521
}
1522
} else {
1523
exitcode = EXIT_SUCCESS;
1524
}
1525
goto end;
1526
}
1527
1528
if(quit_now){
1529
goto end;
1530
}
1531
1532
{
1533
AvahiServerConfig config;
1534
/* Do not publish any local Zeroconf records */
1535
avahi_server_config_init(&config);
1536
config.publish_hinfo = 0;
1537
config.publish_addresses = 0;
1538
config.publish_workstation = 0;
1539
config.publish_domain = 0;
1540
1541
/* Allocate a new server */
1542
mc.server = avahi_server_new(avahi_simple_poll_get
1543
(mc.simple_poll), &config, NULL,
1544
NULL, &error);
1545
1546
/* Free the Avahi configuration data */
1547
avahi_server_config_free(&config);
1548
}
1549
1550
/* Check if creating the Avahi server object succeeded */
1551
if(mc.server == NULL){
1552
fprintf(stderr, "Failed to create Avahi server: %s\n",
1553
avahi_strerror(error));
1554
exitcode = EX_UNAVAILABLE;
1555
goto end;
1556
}
1557
1558
if(quit_now){
1559
goto end;
1560
}
1561
1562
/* Create the Avahi service browser */
1563
sb = avahi_s_service_browser_new(mc.server, if_index,
1564
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1565
NULL, 0, browse_callback, NULL);
1566
if(sb == NULL){
1567
fprintf(stderr, "Failed to create service browser: %s\n",
1568
avahi_strerror(avahi_server_errno(mc.server)));
1569
exitcode = EX_UNAVAILABLE;
1570
goto end;
1571
}
1572
1573
if(quit_now){
1574
goto end;
1575
}
1576
1577
/* Run the main loop */
1578
1579
if(debug){
1580
fprintf(stderr, "Starting Avahi loop search\n");
1581
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
1584
1083
1585
end:
1084
1085
if (debug){
1086
fprintf(stderr, "%s exiting\n", argv[0]);
1087
}
1088
1089
/* Cleanup things */
1090
if (sb != NULL)
1091
avahi_s_service_browser_free(sb);
1092
1093
if (mc.server != NULL)
1094
avahi_server_free(mc.server);
1095
1096
if (mc.simple_poll != NULL)
1097
avahi_simple_poll_free(mc.simple_poll);
1098
1099
if (gnutls_initalized){
1100
gnutls_certificate_free_credentials(mc.cred);
1101
gnutls_global_deinit ();
1102
gnutls_dh_params_deinit(mc.dh_params);
1103
}
1104
1105
if(gpgme_initalized){
1106
gpgme_release(mc.ctx);
1107
}
1108
1109
/* Removes the temp directory used by GPGME */
1110
if(tempdir[0] != '\0'){
1111
DIR *d;
1112
struct dirent *direntry;
1113
d = opendir(tempdir);
1114
if(d == NULL){
1586
1587
if(debug){
1588
fprintf(stderr, "%s exiting\n", argv[0]);
1589
}
1590
1591
/* Cleanup things */
1592
if(sb != NULL)
1593
avahi_s_service_browser_free(sb);
1594
1595
if(mc.server != NULL)
1596
avahi_server_free(mc.server);
1597
1598
if(mc.simple_poll != NULL)
1599
avahi_simple_poll_free(mc.simple_poll);
1600
1601
if(gnutls_initialized){
1602
gnutls_certificate_free_credentials(mc.cred);
1603
gnutls_global_deinit();
1604
gnutls_dh_params_deinit(mc.dh_params);
1605
}
1606
1607
if(gpgme_initialized){
1608
gpgme_release(mc.ctx);
1609
}
1610
1611
/* Take down the network interface */
1612
if(take_down_interface){
1613
/* Re-raise priviliges */
1614
errno = 0;
1615
ret = seteuid(0);
1616
if(ret == -1){
1617
perror("seteuid");
1618
}
1619
if(geteuid() == 0){
1620
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1621
if(ret == -1){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
1624
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
1628
}
1629
}
1630
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1631
if(ret == -1){
1632
perror("close");
1633
}
1634
/* Lower privileges permanently */
1635
errno = 0;
1636
ret = setuid(uid);
1637
if(ret == -1){
1638
perror("setuid");
1639
}
1640
}
1641
}
1642
1643
/* Removes the temp directory used by GPGME */
1644
if(tempdir_created){
1645
DIR *d;
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1648
if(d == NULL){
1649
if(errno != ENOENT){
1115
1650
perror("opendir");
1116
} else {
1117
while(true){
1118
direntry = readdir(d);
1119
if(direntry == NULL){
1120
break;
1121
}
1122
if (direntry->d_type == DT_REG){
1123
char *fullname = NULL;
1124
ret = asprintf(&fullname, "%s/%s", tempdir,
1125
direntry->d_name);
1126
if(ret < 0){
1127
perror("asprintf");
1128
continue;
1129
}
1130
ret = unlink(fullname);
1131
if(ret == -1){
1132
fprintf(stderr, "unlink(\"%s\"): %s",
1133
fullname, strerror(errno));
1134
}
1135
free(fullname);
1136
}
1137
}
1138
closedir(d);
1139
}
1140
ret = rmdir(tempdir);
1141
if(ret == -1){
1142
perror("rmdir");
1143
}
1144
}
1145
1146
return exitcode;
1651
}
1652
} else {
1653
while(true){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1656
break;
1657
}
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
1663
continue;
1664
}
1665
char *fullname = NULL;
1666
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
direntry->d_name);
1668
if(ret < 0){
1669
perror("asprintf");
1670
continue;
1671
}
1672
ret = remove(fullname);
1673
if(ret == -1){
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1675
strerror(errno));
1676
}
1677
free(fullname);
1678
}
1679
closedir(d);
1680
}
1681
ret = rmdir(tempdir);
1682
if(ret == -1 and errno != ENOENT){
1683
perror("rmdir");
1684
}
1685
}
1686
1687
if(quit_now){
1688
sigemptyset(&old_sigterm_action.sa_mask);
1689
old_sigterm_action.sa_handler = SIG_DFL;
1690
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1691
&old_sigterm_action,
1692
NULL));
1693
if(ret == -1){
1694
perror("sigaction");
1695
}
1696
do {
1697
ret = raise(signal_received);
1698
} while(ret != 0 and errno == EINTR);
1699
if(ret != 0){
1700
perror("raise");
1701
abort();
1702
}
1703
TEMP_FAILURE_RETRY(pause());
1704
}
1705
1706
return exitcode;
1147
1707
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0