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- Committer: Teddy Hogeborn
- Date: 2009-10-30 16:23:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20091030162343-1p2a8bf3gc084kc9
* plugins.d/password-prompt.c: Use environment variables and prompt
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
- 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,
38
ferror() */
38
#endif
39
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
44
#include <stdint.h> /* uint16_t, uint32_t */
40
45
#include <stddef.h> /* NULL, size_t, ssize_t */
41
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
42
srand() */
43
#include <stdbool.h> /* bool, true */
47
srand(), strtof(), abort() */
48
#include <stdbool.h> /* bool, false, true */
44
49
#include <string.h> /* memset(), strcmp(), strlen(),
45
strerror(), memcpy(), strcpy() */
46
#include <sys/ioctl.h> /* ioctl */
47
#include <net/if.h> /* ifreq, SIOCGIFFLAGS, SIOCSIFFLAGS,
48
IFF_UP */
50
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
49
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
53
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t */
53
#include <inttypes.h> /* PRIu16 */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
54
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
55
struct in6_addr, inet_pton(),
56
connect() */
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() */
57
64
#include <assert.h> /* assert() */
58
65
#include <errno.h> /* perror(), errno */
59
#include <time.h> /* time() */
66
#include <time.h> /* nanosleep(), time() */
60
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
61
68
SIOCSIFFLAGS, if_indextoname(),
62
69
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
63
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
64
getuid(), getgid(), setuid(),
65
setgid() */
66
#include <netinet/in.h>
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
67
76
#include <arpa/inet.h> /* inet_pton(), htons */
68
#include <iso646.h> /* not, and */
77
#include <iso646.h> /* not, or, and */
69
78
#include <argp.h> /* struct argp_option, error_t, struct
70
79
argp_state, struct argp,
71
80
argp_parse(), ARGP_KEY_ARG,
72
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 */
86
87
#ifdef __linux__
88
#include <sys/klog.h> /* klogctl() */
89
#endif /* __linux__ */
73
90
74
91
/* Avahi */
75
92
/* All Avahi types, constants and functions
83
100
#include <avahi-common/error.h>
84
101
85
102
/* GnuTLS */
86
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions
103
#include <gnutls/gnutls.h> /* All GnuTLS types, constants and
104
functions:
87
105
gnutls_*
88
106
init_gnutls_session(),
89
107
GNUTLS_* */
90
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
108
#include <gnutls/openpgp.h>
109
/* gnutls_certificate_set_openpgp_key_file(),
91
110
GNUTLS_OPENPGP_FMT_BASE64 */
92
111
93
112
/* GPGME */
94
#include <gpgme.h> /* All GPGME types, constants and functions
113
#include <gpgme.h> /* All GPGME types, constants and
114
functions:
95
115
gpgme_*
96
116
GPGME_PROTOCOL_OpenPGP,
97
117
GPG_ERR_NO_* */
98
118
99
119
#define BUFFER_SIZE 256
100
120
121
#define PATHDIR "/conf/conf.d/mandos"
122
#define SECKEY "seckey.txt"
123
#define PUBKEY "pubkey.txt"
124
101
125
bool debug = false;
102
static const char *keydir = "/conf/conf.d/mandos";
103
126
static const char mandos_protocol_version[] = "1";
104
const char *argp_program_version = "password-request 1.0";
127
const char *argp_program_version = "mandos-client " VERSION;
105
128
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
106
129
107
130
/* Used for passing in values through the Avahi callback functions */
112
135
unsigned int dh_bits;
113
136
gnutls_dh_params_t dh_params;
114
137
const char *priority;
138
gpgme_ctx_t ctx;
115
139
} mandos_context;
116
140
141
/* global context so signal handler can reach it*/
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
143
.dh_bits = 1024, .priority = "SECURE256"
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
145
146
sig_atomic_t quit_now = 0;
147
int signal_received = 0;
148
117
149
/*
118
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
119
* "buffer_capacity" is how much is currently allocated,
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
151
* bytes. "buffer_capacity" is how much is currently allocated,
120
152
* "buffer_length" is how much is already used.
121
153
*/
122
size_t adjustbuffer(char **buffer, size_t buffer_length,
154
size_t incbuffer(char **buffer, size_t buffer_length,
123
155
size_t buffer_capacity){
124
if (buffer_length + BUFFER_SIZE > buffer_capacity){
156
if(buffer_length + BUFFER_SIZE > buffer_capacity){
125
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
126
if (buffer == NULL){
158
if(buffer == NULL){
127
159
return 0;
128
160
}
129
161
buffer_capacity += BUFFER_SIZE;
132
164
}
133
165
134
166
/*
135
* Decrypt OpenPGP data using keyrings in HOMEDIR.
136
* Returns -1 on error
167
* Initialize GPGME.
137
168
*/
138
static ssize_t pgp_packet_decrypt (const char *cryptotext,
139
size_t crypto_size,
140
char **plaintext,
141
const char *homedir){
142
gpgme_data_t dh_crypto, dh_plain;
143
gpgme_ctx_t ctx;
169
static bool init_gpgme(const char *seckey,
170
const char *pubkey, const char *tempdir){
144
171
gpgme_error_t rc;
145
ssize_t ret;
146
size_t plaintext_capacity = 0;
147
ssize_t plaintext_length = 0;
148
172
gpgme_engine_info_t engine_info;
149
173
150
if (debug){
151
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
174
175
/*
176
* Helper function to insert pub and seckey to the engine keyring.
177
*/
178
bool import_key(const char *filename){
179
int ret;
180
int fd;
181
gpgme_data_t pgp_data;
182
183
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
184
if(fd == -1){
185
perror("open");
186
return false;
187
}
188
189
rc = gpgme_data_new_from_fd(&pgp_data, fd);
190
if(rc != GPG_ERR_NO_ERROR){
191
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
192
gpgme_strsource(rc), gpgme_strerror(rc));
193
return false;
194
}
195
196
rc = gpgme_op_import(mc.ctx, pgp_data);
197
if(rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
200
return false;
201
}
202
203
ret = (int)TEMP_FAILURE_RETRY(close(fd));
204
if(ret == -1){
205
perror("close");
206
}
207
gpgme_data_release(pgp_data);
208
return true;
209
}
210
211
if(debug){
212
fprintf(stderr, "Initializing GPGME\n");
152
213
}
153
214
154
215
/* Init GPGME */
155
216
gpgme_check_version(NULL);
156
217
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
157
if (rc != GPG_ERR_NO_ERROR){
218
if(rc != GPG_ERR_NO_ERROR){
158
219
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
159
220
gpgme_strsource(rc), gpgme_strerror(rc));
160
return -1;
221
return false;
161
222
}
162
223
163
/* Set GPGME home directory for the OpenPGP engine only */
164
rc = gpgme_get_engine_info (&engine_info);
165
if (rc != GPG_ERR_NO_ERROR){
224
/* Set GPGME home directory for the OpenPGP engine only */
225
rc = gpgme_get_engine_info(&engine_info);
226
if(rc != GPG_ERR_NO_ERROR){
166
227
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
167
228
gpgme_strsource(rc), gpgme_strerror(rc));
168
return -1;
229
return false;
169
230
}
170
231
while(engine_info != NULL){
171
232
if(engine_info->protocol == GPGME_PROTOCOL_OpenPGP){
172
233
gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
173
engine_info->file_name, homedir);
234
engine_info->file_name, tempdir);
174
235
break;
175
236
}
176
237
engine_info = engine_info->next;
177
238
}
178
239
if(engine_info == NULL){
179
fprintf(stderr, "Could not set GPGME home dir to %s\n", homedir);
180
return -1;
240
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
241
return false;
242
}
243
244
/* Create new GPGME "context" */
245
rc = gpgme_new(&(mc.ctx));
246
if(rc != GPG_ERR_NO_ERROR){
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
gpgme_strsource(rc), gpgme_strerror(rc));
249
return false;
250
}
251
252
if(not import_key(pubkey) or not import_key(seckey)){
253
return false;
254
}
255
256
return true;
257
}
258
259
/*
260
* Decrypt OpenPGP data.
261
* Returns -1 on error
262
*/
263
static ssize_t pgp_packet_decrypt(const char *cryptotext,
264
size_t crypto_size,
265
char **plaintext){
266
gpgme_data_t dh_crypto, dh_plain;
267
gpgme_error_t rc;
268
ssize_t ret;
269
size_t plaintext_capacity = 0;
270
ssize_t plaintext_length = 0;
271
272
if(debug){
273
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
181
274
}
182
275
183
276
/* Create new GPGME data buffer from memory cryptotext */
184
277
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
185
278
0);
186
if (rc != GPG_ERR_NO_ERROR){
279
if(rc != GPG_ERR_NO_ERROR){
187
280
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
188
281
gpgme_strsource(rc), gpgme_strerror(rc));
189
282
return -1;
191
284
192
285
/* Create new empty GPGME data buffer for the plaintext */
193
286
rc = gpgme_data_new(&dh_plain);
194
if (rc != GPG_ERR_NO_ERROR){
287
if(rc != GPG_ERR_NO_ERROR){
195
288
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
196
289
gpgme_strsource(rc), gpgme_strerror(rc));
197
290
gpgme_data_release(dh_crypto);
198
291
return -1;
199
292
}
200
293
201
/* Create new GPGME "context" */
202
rc = gpgme_new(&ctx);
203
if (rc != GPG_ERR_NO_ERROR){
204
fprintf(stderr, "bad gpgme_new: %s: %s\n",
205
gpgme_strsource(rc), gpgme_strerror(rc));
206
plaintext_length = -1;
207
goto decrypt_end;
208
}
209
210
294
/* Decrypt data from the cryptotext data buffer to the plaintext
211
295
data buffer */
212
rc = gpgme_op_decrypt(ctx, dh_crypto, dh_plain);
213
if (rc != GPG_ERR_NO_ERROR){
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
297
if(rc != GPG_ERR_NO_ERROR){
214
298
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
215
299
gpgme_strsource(rc), gpgme_strerror(rc));
216
300
plaintext_length = -1;
217
goto decrypt_end;
218
}
219
220
if(debug){
221
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
222
}
223
224
if (debug){
225
gpgme_decrypt_result_t result;
226
result = gpgme_op_decrypt_result(ctx);
227
if (result == NULL){
228
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
229
} else {
230
fprintf(stderr, "Unsupported algorithm: %s\n",
231
result->unsupported_algorithm);
232
fprintf(stderr, "Wrong key usage: %u\n",
233
result->wrong_key_usage);
234
if(result->file_name != NULL){
235
fprintf(stderr, "File name: %s\n", result->file_name);
236
}
237
gpgme_recipient_t recipient;
238
recipient = result->recipients;
239
if(recipient){
301
if(debug){
302
gpgme_decrypt_result_t result;
303
result = gpgme_op_decrypt_result(mc.ctx);
304
if(result == NULL){
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
306
} else {
307
fprintf(stderr, "Unsupported algorithm: %s\n",
308
result->unsupported_algorithm);
309
fprintf(stderr, "Wrong key usage: %u\n",
310
result->wrong_key_usage);
311
if(result->file_name != NULL){
312
fprintf(stderr, "File name: %s\n", result->file_name);
313
}
314
gpgme_recipient_t recipient;
315
recipient = result->recipients;
240
316
while(recipient != NULL){
241
317
fprintf(stderr, "Public key algorithm: %s\n",
242
318
gpgme_pubkey_algo_name(recipient->pubkey_algo));
248
324
}
249
325
}
250
326
}
327
goto decrypt_end;
328
}
329
330
if(debug){
331
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
251
332
}
252
333
253
334
/* Seek back to the beginning of the GPGME plaintext data buffer */
254
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
255
perror("pgpme_data_seek");
335
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
336
perror("gpgme_data_seek");
256
337
plaintext_length = -1;
257
338
goto decrypt_end;
258
339
}
259
340
260
341
*plaintext = NULL;
261
342
while(true){
262
plaintext_capacity = adjustbuffer(plaintext,
343
plaintext_capacity = incbuffer(plaintext,
263
344
(size_t)plaintext_length,
264
345
plaintext_capacity);
265
if (plaintext_capacity == 0){
266
perror("adjustbuffer");
346
if(plaintext_capacity == 0){
347
perror("incbuffer");
267
348
plaintext_length = -1;
268
349
goto decrypt_end;
269
350
}
271
352
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
272
353
BUFFER_SIZE);
273
354
/* Print the data, if any */
274
if (ret == 0){
355
if(ret == 0){
275
356
/* EOF */
276
357
break;
277
358
}
282
363
}
283
364
plaintext_length += ret;
284
365
}
285
366
286
367
if(debug){
287
368
fprintf(stderr, "Decrypted password is: ");
288
369
for(ssize_t i = 0; i < plaintext_length; i++){
301
382
return plaintext_length;
302
383
}
303
384
304
static const char * safer_gnutls_strerror (int value) {
305
const char *ret = gnutls_strerror (value);
306
if (ret == NULL)
385
static const char * safer_gnutls_strerror(int value){
386
const char *ret = gnutls_strerror(value); /* Spurious warning from
387
-Wunreachable-code */
388
if(ret == NULL)
307
389
ret = "(unknown)";
308
390
return ret;
309
391
}
314
396
fprintf(stderr, "GnuTLS: %s", string);
315
397
}
316
398
317
static int init_gnutls_global(mandos_context *mc,
318
const char *pubkeyfile,
319
const char *seckeyfile){
399
static int init_gnutls_global(const char *pubkeyfilename,
400
const char *seckeyfilename){
320
401
int ret;
321
402
322
403
if(debug){
324
405
}
325
406
326
407
ret = gnutls_global_init();
327
if (ret != GNUTLS_E_SUCCESS) {
328
fprintf (stderr, "GnuTLS global_init: %s\n",
329
safer_gnutls_strerror(ret));
408
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS global_init: %s\n",
410
safer_gnutls_strerror(ret));
330
411
return -1;
331
412
}
332
413
333
if (debug){
414
if(debug){
334
415
/* "Use a log level over 10 to enable all debugging options."
335
416
* - GnuTLS manual
336
417
*/
339
420
}
340
421
341
422
/* OpenPGP credentials */
342
gnutls_certificate_allocate_credentials(&mc->cred);
343
if (ret != GNUTLS_E_SUCCESS){
344
fprintf (stderr, "GnuTLS memory error: %s\n",
345
safer_gnutls_strerror(ret));
346
gnutls_global_deinit ();
423
gnutls_certificate_allocate_credentials(&mc.cred);
424
if(ret != GNUTLS_E_SUCCESS){
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
429
safer_gnutls_strerror(ret));
430
gnutls_global_deinit();
347
431
return -1;
348
432
}
349
433
350
434
if(debug){
351
fprintf(stderr, "Attempting to use OpenPGP certificate %s"
352
" and keyfile %s as GnuTLS credentials\n", pubkeyfile,
353
seckeyfile);
435
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
436
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
437
seckeyfilename);
354
438
}
355
439
356
440
ret = gnutls_certificate_set_openpgp_key_file
357
(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);
358
if (ret != GNUTLS_E_SUCCESS) {
441
(mc.cred, pubkeyfilename, seckeyfilename,
442
GNUTLS_OPENPGP_FMT_BASE64);
443
if(ret != GNUTLS_E_SUCCESS){
359
444
fprintf(stderr,
360
445
"Error[%d] while reading the OpenPGP key pair ('%s',"
361
" '%s')\n", ret, pubkeyfile, seckeyfile);
362
fprintf(stdout, "The GnuTLS error is: %s\n",
446
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
447
fprintf(stderr, "The GnuTLS error is: %s\n",
363
448
safer_gnutls_strerror(ret));
364
449
goto globalfail;
365
450
}
366
451
367
452
/* GnuTLS server initialization */
368
ret = gnutls_dh_params_init(&mc->dh_params);
369
if (ret != GNUTLS_E_SUCCESS) {
370
fprintf (stderr, "Error in GnuTLS DH parameter initialization:"
371
" %s\n", safer_gnutls_strerror(ret));
372
goto globalfail;
373
}
374
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
375
if (ret != GNUTLS_E_SUCCESS) {
376
fprintf (stderr, "Error in GnuTLS prime generation: %s\n",
377
safer_gnutls_strerror(ret));
378
goto globalfail;
379
}
380
381
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
382
453
ret = gnutls_dh_params_init(&mc.dh_params);
454
if(ret != GNUTLS_E_SUCCESS){
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
" %s\n", safer_gnutls_strerror(ret));
457
goto globalfail;
458
}
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
460
if(ret != GNUTLS_E_SUCCESS){
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
safer_gnutls_strerror(ret));
463
goto globalfail;
464
}
465
466
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
467
383
468
return 0;
384
469
385
470
globalfail:
386
387
gnutls_certificate_free_credentials(mc->cred);
471
472
gnutls_certificate_free_credentials(mc.cred);
388
473
gnutls_global_deinit();
474
gnutls_dh_params_deinit(mc.dh_params);
389
475
return -1;
390
391
476
}
392
477
393
static int init_gnutls_session(mandos_context *mc,
394
gnutls_session_t *session){
478
static int init_gnutls_session(gnutls_session_t *session){
395
479
int ret;
396
480
/* GnuTLS session creation */
397
ret = gnutls_init(session, GNUTLS_SERVER);
398
if (ret != GNUTLS_E_SUCCESS){
481
do {
482
ret = gnutls_init(session, GNUTLS_SERVER);
483
if(quit_now){
484
return -1;
485
}
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
if(ret != GNUTLS_E_SUCCESS){
399
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
400
489
safer_gnutls_strerror(ret));
401
490
}
402
491
403
492
{
404
493
const char *err;
405
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
406
if (ret != GNUTLS_E_SUCCESS) {
494
do {
495
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
496
if(quit_now){
497
gnutls_deinit(*session);
498
return -1;
499
}
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
501
if(ret != GNUTLS_E_SUCCESS){
407
502
fprintf(stderr, "Syntax error at: %s\n", err);
408
503
fprintf(stderr, "GnuTLS error: %s\n",
409
504
safer_gnutls_strerror(ret));
410
gnutls_deinit (*session);
505
gnutls_deinit(*session);
411
506
return -1;
412
507
}
413
508
}
414
509
415
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
416
mc->cred);
417
if (ret != GNUTLS_E_SUCCESS) {
510
do {
511
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
512
mc.cred);
513
if(quit_now){
514
gnutls_deinit(*session);
515
return -1;
516
}
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
518
if(ret != GNUTLS_E_SUCCESS){
418
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
419
520
safer_gnutls_strerror(ret));
420
gnutls_deinit (*session);
521
gnutls_deinit(*session);
421
522
return -1;
422
523
}
423
524
424
525
/* ignore client certificate if any. */
425
gnutls_certificate_server_set_request (*session,
426
GNUTLS_CERT_IGNORE);
526
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
427
527
428
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
429
529
430
530
return 0;
431
531
}
437
537
/* Called when a Mandos server is found */
438
538
static int start_mandos_communication(const char *ip, uint16_t port,
439
539
AvahiIfIndex if_index,
440
mandos_context *mc){
441
int ret, tcp_sd;
442
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
540
int af){
541
int ret, tcp_sd = -1;
542
ssize_t sret;
543
union {
544
struct sockaddr_in in;
545
struct sockaddr_in6 in6;
546
} to;
443
547
char *buffer = NULL;
444
char *decrypted_buffer;
548
char *decrypted_buffer = NULL;
445
549
size_t buffer_length = 0;
446
550
size_t buffer_capacity = 0;
447
ssize_t decrypted_buffer_size;
448
551
size_t written;
449
int retval = 0;
450
char interface[IF_NAMESIZE];
552
int retval = -1;
451
553
gnutls_session_t session;
452
453
ret = init_gnutls_session (mc, &session);
454
if (ret != 0){
554
int pf; /* Protocol family */
555
556
if(quit_now){
557
return -1;
558
}
559
560
switch(af){
561
case AF_INET6:
562
pf = PF_INET6;
563
break;
564
case AF_INET:
565
pf = PF_INET;
566
break;
567
default:
568
fprintf(stderr, "Bad address family: %d\n", af);
569
return -1;
570
}
571
572
ret = init_gnutls_session(&session);
573
if(ret != 0){
455
574
return -1;
456
575
}
457
576
458
577
if(debug){
459
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
460
579
"\n", ip, port);
461
580
}
462
581
463
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
464
if(tcp_sd < 0) {
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
583
if(tcp_sd < 0){
465
584
perror("socket");
466
return -1;
467
}
468
469
if(debug){
470
if(if_indextoname((unsigned int)if_index, interface) == NULL){
471
perror("if_indextoname");
472
return -1;
473
}
474
fprintf(stderr, "Binding to interface %s\n", interface);
475
}
476
477
memset(&to,0,sizeof(to)); /* Spurious warning */
478
to.in6.sin6_family = AF_INET6;
479
/* It would be nice to have a way to detect if we were passed an
480
IPv4 address here. Now we assume an IPv6 address. */
481
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
482
if (ret < 0 ){
585
goto mandos_end;
586
}
587
588
if(quit_now){
589
goto mandos_end;
590
}
591
592
memset(&to, 0, sizeof(to));
593
if(af == AF_INET6){
594
to.in6.sin6_family = (sa_family_t)af;
595
ret = inet_pton(af, ip, &to.in6.sin6_addr);
596
} else { /* IPv4 */
597
to.in.sin_family = (sa_family_t)af;
598
ret = inet_pton(af, ip, &to.in.sin_addr);
599
}
600
if(ret < 0 ){
483
601
perror("inet_pton");
484
return -1;
602
goto mandos_end;
485
603
}
486
604
if(ret == 0){
487
605
fprintf(stderr, "Bad address: %s\n", ip);
488
return -1;
489
}
490
to.in6.sin6_port = htons(port); /* Spurious warning */
606
goto mandos_end;
607
}
608
if(af == AF_INET6){
609
to.in6.sin6_port = htons(port); /* Spurious warnings from
610
-Wconversion and
611
-Wunreachable-code */
612
613
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
614
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
615
-Wunreachable-code*/
616
if(if_index == AVAHI_IF_UNSPEC){
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
619
goto mandos_end;
620
}
621
/* Set the network interface number as scope */
622
to.in6.sin6_scope_id = (uint32_t)if_index;
623
}
624
} else {
625
to.in.sin_port = htons(port); /* Spurious warnings from
626
-Wconversion and
627
-Wunreachable-code */
628
}
491
629
492
to.in6.sin6_scope_id = (uint32_t)if_index;
630
if(quit_now){
631
goto mandos_end;
632
}
493
633
494
634
if(debug){
495
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
496
port);
497
char addrstr[INET6_ADDRSTRLEN] = "";
498
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
499
sizeof(addrstr)) == NULL){
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
636
char interface[IF_NAMESIZE];
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
638
perror("if_indextoname");
639
} else {
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
642
}
643
} else {
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
646
}
647
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
648
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
649
const char *pcret;
650
if(af == AF_INET6){
651
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
652
sizeof(addrstr));
653
} else {
654
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
655
sizeof(addrstr));
656
}
657
if(pcret == NULL){
500
658
perror("inet_ntop");
501
659
} else {
502
660
if(strcmp(addrstr, ip) != 0){
505
663
}
506
664
}
507
665
508
ret = connect(tcp_sd, &to.in, sizeof(to));
509
if (ret < 0){
666
if(quit_now){
667
goto mandos_end;
668
}
669
670
if(af == AF_INET6){
671
ret = connect(tcp_sd, &to.in6, sizeof(to));
672
} else {
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
674
}
675
if(ret < 0){
510
676
perror("connect");
511
return -1;
512
}
513
677
goto mandos_end;
678
}
679
680
if(quit_now){
681
goto mandos_end;
682
}
683
514
684
const char *out = mandos_protocol_version;
515
685
written = 0;
516
while (true){
686
while(true){
517
687
size_t out_size = strlen(out);
518
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
688
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
519
689
out_size - written));
520
if (ret == -1){
690
if(ret == -1){
521
691
perror("write");
522
retval = -1;
523
692
goto mandos_end;
524
693
}
525
694
written += (size_t)ret;
526
695
if(written < out_size){
527
696
continue;
528
697
} else {
529
if (out == mandos_protocol_version){
698
if(out == mandos_protocol_version){
530
699
written = 0;
531
700
out = "\r\n";
532
701
} else {
533
702
break;
534
703
}
535
704
}
705
706
if(quit_now){
707
goto mandos_end;
708
}
536
709
}
537
710
538
711
if(debug){
539
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
540
713
}
541
714
542
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
543
544
do{
545
ret = gnutls_handshake (session);
715
if(quit_now){
716
goto mandos_end;
717
}
718
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
720
721
if(quit_now){
722
goto mandos_end;
723
}
724
725
do {
726
ret = gnutls_handshake(session);
727
if(quit_now){
728
goto mandos_end;
729
}
546
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
547
731
548
if (ret != GNUTLS_E_SUCCESS){
732
if(ret != GNUTLS_E_SUCCESS){
549
733
if(debug){
550
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
551
gnutls_perror (ret);
735
gnutls_perror(ret);
552
736
}
553
retval = -1;
554
737
goto mandos_end;
555
738
}
556
739
557
740
/* Read OpenPGP packet that contains the wanted password */
558
741
559
742
if(debug){
560
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
561
744
ip);
562
745
}
563
746
564
747
while(true){
565
buffer_capacity = adjustbuffer(&buffer, buffer_length,
748
749
if(quit_now){
750
goto mandos_end;
751
}
752
753
buffer_capacity = incbuffer(&buffer, buffer_length,
566
754
buffer_capacity);
567
if (buffer_capacity == 0){
568
perror("adjustbuffer");
569
retval = -1;
570
goto mandos_end;
571
}
572
573
ret = gnutls_record_recv(session, buffer+buffer_length,
574
BUFFER_SIZE);
575
if (ret == 0){
755
if(buffer_capacity == 0){
756
perror("incbuffer");
757
goto mandos_end;
758
}
759
760
if(quit_now){
761
goto mandos_end;
762
}
763
764
sret = gnutls_record_recv(session, buffer+buffer_length,
765
BUFFER_SIZE);
766
if(sret == 0){
576
767
break;
577
768
}
578
if (ret < 0){
579
switch(ret){
769
if(sret < 0){
770
switch(sret){
580
771
case GNUTLS_E_INTERRUPTED:
581
772
case GNUTLS_E_AGAIN:
582
773
break;
583
774
case GNUTLS_E_REHANDSHAKE:
584
do{
585
ret = gnutls_handshake (session);
775
do {
776
ret = gnutls_handshake(session);
777
778
if(quit_now){
779
goto mandos_end;
780
}
586
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
587
if (ret < 0){
782
if(ret < 0){
588
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
589
gnutls_perror (ret);
590
retval = -1;
784
gnutls_perror(ret);
591
785
goto mandos_end;
592
786
}
593
787
break;
594
788
default:
595
789
fprintf(stderr, "Unknown error while reading data from"
596
790
" encrypted session with Mandos server\n");
597
retval = -1;
598
gnutls_bye (session, GNUTLS_SHUT_RDWR);
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
599
792
goto mandos_end;
600
793
}
601
794
} else {
602
buffer_length += (size_t) ret;
795
buffer_length += (size_t) sret;
603
796
}
604
797
}
605
798
607
800
fprintf(stderr, "Closing TLS session\n");
608
801
}
609
802
610
gnutls_bye (session, GNUTLS_SHUT_RDWR);
611
612
if (buffer_length > 0){
803
if(quit_now){
804
goto mandos_end;
805
}
806
807
do {
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
809
if(quit_now){
810
goto mandos_end;
811
}
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
813
814
if(buffer_length > 0){
815
ssize_t decrypted_buffer_size;
613
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
614
817
buffer_length,
615
&decrypted_buffer,
616
keydir);
617
if (decrypted_buffer_size >= 0){
818
&decrypted_buffer);
819
if(decrypted_buffer_size >= 0){
820
618
821
written = 0;
619
822
while(written < (size_t) decrypted_buffer_size){
620
ret = (int)fwrite (decrypted_buffer + written, 1,
621
(size_t)decrypted_buffer_size - written,
622
stdout);
823
if(quit_now){
824
goto mandos_end;
825
}
826
827
ret = (int)fwrite(decrypted_buffer + written, 1,
828
(size_t)decrypted_buffer_size - written,
829
stdout);
623
830
if(ret == 0 and ferror(stdout)){
624
831
if(debug){
625
832
fprintf(stderr, "Error writing encrypted data: %s\n",
626
833
strerror(errno));
627
834
}
628
retval = -1;
629
break;
835
goto mandos_end;
630
836
}
631
837
written += (size_t)ret;
632
838
}
633
free(decrypted_buffer);
634
} else {
635
retval = -1;
839
retval = 0;
636
840
}
637
841
}
638
842
639
843
/* Shutdown procedure */
640
844
641
845
mandos_end:
846
free(decrypted_buffer);
642
847
free(buffer);
643
close(tcp_sd);
644
gnutls_deinit (session);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
851
if(ret == -1){
852
perror("close");
853
}
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
857
}
645
858
return retval;
646
859
}
647
860
648
861
static void resolve_callback(AvahiSServiceResolver *r,
649
862
AvahiIfIndex interface,
650
AVAHI_GCC_UNUSED AvahiProtocol protocol,
863
AvahiProtocol proto,
651
864
AvahiResolverEvent event,
652
865
const char *name,
653
866
const char *type,
658
871
AVAHI_GCC_UNUSED AvahiStringList *txt,
659
872
AVAHI_GCC_UNUSED AvahiLookupResultFlags
660
873
flags,
661
void* userdata) {
662
mandos_context *mc = userdata;
663
assert(r); /* Spurious warning */
874
AVAHI_GCC_UNUSED void* userdata){
875
assert(r);
664
876
665
877
/* Called whenever a service has been resolved successfully or
666
878
timed out */
667
879
668
switch (event) {
880
if(quit_now){
881
return;
882
}
883
884
switch(event){
669
885
default:
670
886
case AVAHI_RESOLVER_FAILURE:
671
887
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
672
888
" of type '%s' in domain '%s': %s\n", name, type, domain,
673
avahi_strerror(avahi_server_errno(mc->server)));
889
avahi_strerror(avahi_server_errno(mc.server)));
674
890
break;
675
891
676
892
case AVAHI_RESOLVER_FOUND:
679
895
avahi_address_snprint(ip, sizeof(ip), address);
680
896
if(debug){
681
897
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
682
PRIu16 ") on port %d\n", name, host_name, ip,
683
interface, port);
898
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
899
ip, (intmax_t)interface, port);
684
900
}
685
int ret = start_mandos_communication(ip, port, interface, mc);
686
if (ret == 0){
687
exit(EXIT_SUCCESS);
901
int ret = start_mandos_communication(ip, port, interface,
902
avahi_proto_to_af(proto));
903
if(ret == 0){
904
avahi_simple_poll_quit(mc.simple_poll);
688
905
}
689
906
}
690
907
}
691
908
avahi_s_service_resolver_free(r);
692
909
}
693
910
694
static void browse_callback( AvahiSServiceBrowser *b,
695
AvahiIfIndex interface,
696
AvahiProtocol protocol,
697
AvahiBrowserEvent event,
698
const char *name,
699
const char *type,
700
const char *domain,
701
AVAHI_GCC_UNUSED AvahiLookupResultFlags
702
flags,
703
void* userdata) {
704
mandos_context *mc = userdata;
705
assert(b); /* Spurious warning */
911
static void browse_callback(AvahiSServiceBrowser *b,
912
AvahiIfIndex interface,
913
AvahiProtocol protocol,
914
AvahiBrowserEvent event,
915
const char *name,
916
const char *type,
917
const char *domain,
918
AVAHI_GCC_UNUSED AvahiLookupResultFlags
919
flags,
920
AVAHI_GCC_UNUSED void* userdata){
921
assert(b);
706
922
707
923
/* Called whenever a new services becomes available on the LAN or
708
924
is removed from the LAN */
709
925
710
switch (event) {
926
if(quit_now){
927
return;
928
}
929
930
switch(event){
711
931
default:
712
932
case AVAHI_BROWSER_FAILURE:
713
933
714
934
fprintf(stderr, "(Avahi browser) %s\n",
715
avahi_strerror(avahi_server_errno(mc->server)));
716
avahi_simple_poll_quit(mc->simple_poll);
935
avahi_strerror(avahi_server_errno(mc.server)));
936
avahi_simple_poll_quit(mc.simple_poll);
717
937
return;
718
938
719
939
case AVAHI_BROWSER_NEW:
722
942
the callback function is called the Avahi server will free the
723
943
resolver for us. */
724
944
725
if (!(avahi_s_service_resolver_new(mc->server, interface,
726
protocol, name, type, domain,
727
AVAHI_PROTO_INET6, 0,
728
resolve_callback, mc)))
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
729
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
730
name, avahi_strerror(avahi_server_errno(mc->server)));
949
name, avahi_strerror(avahi_server_errno(mc.server)));
731
950
break;
732
951
733
952
case AVAHI_BROWSER_REMOVE:
742
961
}
743
962
}
744
963
745
/* Combines file name and path and returns the malloced new
746
string. some sane checks could/should be added */
747
static const char *combinepath(const char *first, const char *second){
748
size_t f_len = strlen(first);
749
size_t s_len = strlen(second);
750
char *tmp = malloc(f_len + s_len + 2);
751
if (tmp == NULL){
752
return NULL;
753
}
754
if(f_len > 0){
755
memcpy(tmp, first, f_len); /* Spurious warning */
756
}
757
tmp[f_len] = '/';
758
if(s_len > 0){
759
memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */
760
}
761
tmp[f_len + 1 + s_len] = '\0';
762
return tmp;
964
/* stop main loop after sigterm has been called */
965
static void handle_sigterm(int sig){
966
if(quit_now){
967
return;
968
}
969
quit_now = 1;
970
signal_received = sig;
971
int old_errno = errno;
972
if(mc.simple_poll != NULL){
973
avahi_simple_poll_quit(mc.simple_poll);
974
}
975
errno = old_errno;
763
976
}
764
977
765
766
978
int main(int argc, char *argv[]){
767
AvahiSServiceBrowser *sb = NULL;
768
int error;
769
int ret;
770
int exitcode = EXIT_SUCCESS;
771
const char *interface = "eth0";
772
struct ifreq network;
773
int sd;
774
uid_t uid;
775
gid_t gid;
776
char *connect_to = NULL;
777
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
778
const char *pubkeyfile = "pubkey.txt";
779
const char *seckeyfile = "seckey.txt";
780
mandos_context mc = { .simple_poll = NULL, .server = NULL,
781
.dh_bits = 1024, .priority = "SECURE256"};
782
bool gnutls_initalized = false;
783
784
{
785
struct argp_option options[] = {
786
{ .name = "debug", .key = 128,
787
.doc = "Debug mode", .group = 3 },
788
{ .name = "connect", .key = 'c',
789
.arg = "IP",
790
.doc = "Connect directly to a sepcified mandos server",
791
.group = 1 },
792
{ .name = "interface", .key = 'i',
793
.arg = "INTERFACE",
794
.doc = "Interface that Avahi will conntect through",
795
.group = 1 },
796
{ .name = "keydir", .key = 'd',
797
.arg = "KEYDIR",
798
.doc = "Directory where the openpgp keyring is",
799
.group = 1 },
800
{ .name = "seckey", .key = 's',
801
.arg = "SECKEY",
802
.doc = "Secret openpgp key for gnutls authentication",
803
.group = 1 },
804
{ .name = "pubkey", .key = 'p',
805
.arg = "PUBKEY",
806
.doc = "Public openpgp key for gnutls authentication",
807
.group = 2 },
808
{ .name = "dh-bits", .key = 129,
809
.arg = "BITS",
810
.doc = "dh-bits to use in gnutls communication",
811
.group = 2 },
812
{ .name = "priority", .key = 130,
813
.arg = "PRIORITY",
814
.doc = "GNUTLS priority", .group = 1 },
815
{ .name = NULL }
816
};
817
818
819
error_t parse_opt (int key, char *arg,
820
struct argp_state *state) {
821
/* Get the INPUT argument from `argp_parse', which we know is
822
a pointer to our plugin list pointer. */
823
switch (key) {
824
case 128:
825
debug = true;
826
break;
827
case 'c':
828
connect_to = arg;
829
break;
830
case 'i':
831
interface = arg;
832
break;
833
case 'd':
834
keydir = arg;
835
break;
836
case 's':
837
seckeyfile = arg;
838
break;
839
case 'p':
840
pubkeyfile = arg;
841
break;
842
case 129:
843
errno = 0;
844
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
845
if (errno){
846
perror("strtol");
847
exit(EXIT_FAILURE);
848
}
849
break;
850
case 130:
851
mc.priority = arg;
852
break;
853
case ARGP_KEY_ARG:
854
argp_usage (state);
855
break;
856
case ARGP_KEY_END:
857
break;
858
default:
859
return ARGP_ERR_UNKNOWN;
860
}
861
return 0;
862
}
863
864
struct argp argp = { .options = options, .parser = parse_opt,
865
.args_doc = "",
866
.doc = "Mandos client -- Get and decrypt"
867
" passwords from mandos server" };
868
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
869
if (ret == ARGP_ERR_UNKNOWN){
870
fprintf(stderr, "Unkown error while parsing arguments\n");
871
exitcode = EXIT_FAILURE;
872
goto end;
873
}
874
}
875
876
pubkeyfile = combinepath(keydir, pubkeyfile);
877
if (pubkeyfile == NULL){
878
perror("combinepath");
879
exitcode = EXIT_FAILURE;
880
goto end;
881
}
882
883
seckeyfile = combinepath(keydir, seckeyfile);
884
if (seckeyfile == NULL){
885
perror("combinepath");
886
goto end;
887
}
888
889
ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);
890
if (ret == -1){
891
fprintf(stderr, "init_gnutls_global\n");
892
goto end;
893
} else {
894
gnutls_initalized = true;
895
}
896
897
uid = getuid();
898
gid = getgid();
899
900
ret = setuid(uid);
901
if (ret == -1){
902
perror("setuid");
903
}
904
905
setgid(gid);
906
if (ret == -1){
907
perror("setgid");
908
}
909
979
AvahiSServiceBrowser *sb = NULL;
980
int error;
981
int ret;
982
intmax_t tmpmax;
983
char *tmp;
984
int exitcode = EXIT_SUCCESS;
985
const char *interface = "eth0";
986
struct ifreq network;
987
int sd = -1;
988
bool take_down_interface = false;
989
uid_t uid;
990
gid_t gid;
991
char *connect_to = NULL;
992
char tempdir[] = "/tmp/mandosXXXXXX";
993
bool tempdir_created = false;
994
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
995
const char *seckey = PATHDIR "/" SECKEY;
996
const char *pubkey = PATHDIR "/" PUBKEY;
997
998
bool gnutls_initialized = false;
999
bool gpgme_initialized = false;
1000
float delay = 2.5f;
1001
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1004
1005
uid = getuid();
1006
gid = getgid();
1007
1008
/* Lower any group privileges we might have, just to be safe */
1009
errno = 0;
1010
ret = setgid(gid);
1011
if(ret == -1){
1012
perror("setgid");
1013
}
1014
1015
/* Lower user privileges (temporarily) */
1016
errno = 0;
1017
ret = seteuid(uid);
1018
if(ret == -1){
1019
perror("seteuid");
1020
}
1021
1022
if(quit_now){
1023
goto end;
1024
}
1025
1026
{
1027
struct argp_option options[] = {
1028
{ .name = "debug", .key = 128,
1029
.doc = "Debug mode", .group = 3 },
1030
{ .name = "connect", .key = 'c',
1031
.arg = "ADDRESS:PORT",
1032
.doc = "Connect directly to a specific Mandos server",
1033
.group = 1 },
1034
{ .name = "interface", .key = 'i',
1035
.arg = "NAME",
1036
.doc = "Network interface that will be used to search for"
1037
" Mandos servers",
1038
.group = 1 },
1039
{ .name = "seckey", .key = 's',
1040
.arg = "FILE",
1041
.doc = "OpenPGP secret key file base name",
1042
.group = 1 },
1043
{ .name = "pubkey", .key = 'p',
1044
.arg = "FILE",
1045
.doc = "OpenPGP public key file base name",
1046
.group = 2 },
1047
{ .name = "dh-bits", .key = 129,
1048
.arg = "BITS",
1049
.doc = "Bit length of the prime number used in the"
1050
" Diffie-Hellman key exchange",
1051
.group = 2 },
1052
{ .name = "priority", .key = 130,
1053
.arg = "STRING",
1054
.doc = "GnuTLS priority string for the TLS handshake",
1055
.group = 1 },
1056
{ .name = "delay", .key = 131,
1057
.arg = "SECONDS",
1058
.doc = "Maximum delay to wait for interface startup",
1059
.group = 2 },
1060
/*
1061
* These reproduce what we would get without ARGP_NO_HELP
1062
*/
1063
{ .name = "help", .key = '?',
1064
.doc = "Give this help list", .group = -1 },
1065
{ .name = "usage", .key = -3,
1066
.doc = "Give a short usage message", .group = -1 },
1067
{ .name = "version", .key = 'V',
1068
.doc = "Print program version", .group = -1 },
1069
{ .name = NULL }
1070
};
1071
1072
error_t parse_opt(int key, char *arg,
1073
struct argp_state *state){
1074
errno = 0;
1075
switch(key){
1076
case 128: /* --debug */
1077
debug = true;
1078
break;
1079
case 'c': /* --connect */
1080
connect_to = arg;
1081
break;
1082
case 'i': /* --interface */
1083
interface = arg;
1084
break;
1085
case 's': /* --seckey */
1086
seckey = arg;
1087
break;
1088
case 'p': /* --pubkey */
1089
pubkey = arg;
1090
break;
1091
case 129: /* --dh-bits */
1092
errno = 0;
1093
tmpmax = strtoimax(arg, &tmp, 10);
1094
if(errno != 0 or tmp == arg or *tmp != '\0'
1095
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1096
argp_error(state, "Bad number of DH bits");
1097
}
1098
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1099
break;
1100
case 130: /* --priority */
1101
mc.priority = arg;
1102
break;
1103
case 131: /* --delay */
1104
errno = 0;
1105
delay = strtof(arg, &tmp);
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
argp_error(state, "Bad delay");
1108
}
1109
break;
1110
/*
1111
* These reproduce what we would get without ARGP_NO_HELP
1112
*/
1113
case '?': /* --help */
1114
argp_state_help(state, state->out_stream,
1115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1117
case -3: /* --usage */
1118
argp_state_help(state, state->out_stream,
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1122
exit(argp_err_exit_status);
1123
break;
1124
default:
1125
return ARGP_ERR_UNKNOWN;
1126
}
1127
return errno;
1128
}
1129
1130
struct argp argp = { .options = options, .parser = parse_opt,
1131
.args_doc = "",
1132
.doc = "Mandos client -- Get and decrypt"
1133
" passwords from a Mandos server" };
1134
ret = argp_parse(&argp, argc, argv,
1135
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1136
switch(ret){
1137
case 0:
1138
break;
1139
case ENOMEM:
1140
default:
1141
errno = ret;
1142
perror("argp_parse");
1143
exitcode = EX_OSERR;
1144
goto end;
1145
case EINVAL:
1146
exitcode = EX_USAGE;
1147
goto end;
1148
}
1149
}
1150
1151
if(not debug){
1152
avahi_set_log_function(empty_log);
1153
}
1154
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1156
from the signal handler */
1157
/* Initialize the pseudo-RNG for Avahi */
1158
srand((unsigned int) time(NULL));
1159
mc.simple_poll = avahi_simple_poll_new();
1160
if(mc.simple_poll == NULL){
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1163
goto end;
1164
}
1165
1166
sigemptyset(&sigterm_action.sa_mask);
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1168
if(ret == -1){
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1171
goto end;
1172
}
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1174
if(ret == -1){
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1177
goto end;
1178
}
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1180
if(ret == -1){
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1183
goto end;
1184
}
1185
/* Need to check if the handler is SIG_IGN before handling:
1186
| [[info:libc:Initial Signal Actions]] |
1187
| [[info:libc:Basic Signal Handling]] |
1188
*/
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1190
if(ret == -1){
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1193
}
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1196
if(ret == -1){
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1199
goto end;
1200
}
1201
}
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1203
if(ret == -1){
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1206
}
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1209
if(ret == -1){
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1212
goto end;
1213
}
1214
}
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1216
if(ret == -1){
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1219
}
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1222
if(ret == -1){
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
}
1228
1229
/* If the interface is down, bring it up */
1230
if(interface[0] != '\0'){
910
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
911
1232
if(if_index == 0){
912
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
913
exit(EXIT_FAILURE);
914
}
915
916
if(connect_to != NULL){
917
/* Connect directly, do not use Zeroconf */
918
/* (Mainly meant for debugging) */
919
char *address = strrchr(connect_to, ':');
920
if(address == NULL){
921
fprintf(stderr, "No colon in address\n");
922
exitcode = EXIT_FAILURE;
923
goto end;
924
}
925
errno = 0;
926
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
927
if(errno){
928
perror("Bad port number");
929
exitcode = EXIT_FAILURE;
930
goto end;
931
}
932
*address = '\0';
933
address = connect_to;
934
ret = start_mandos_communication(address, port, if_index, &mc);
935
if(ret < 0){
936
exitcode = EXIT_FAILURE;
937
} else {
938
exitcode = EXIT_SUCCESS;
939
}
940
goto end;
941
}
942
943
/* If the interface is down, bring it up */
944
{
945
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
946
if(sd < 0) {
947
perror("socket");
948
exitcode = EXIT_FAILURE;
949
goto end;
950
}
951
strcpy(network.ifr_name, interface); /* Spurious warning */
952
ret = ioctl(sd, SIOCGIFFLAGS, &network);
953
if(ret == -1){
954
perror("ioctl SIOCGIFFLAGS");
955
exitcode = EXIT_FAILURE;
956
goto end;
957
}
958
if((network.ifr_flags & IFF_UP) == 0){
959
network.ifr_flags |= IFF_UP;
1234
exitcode = EXIT_FAILURE;
1235
goto end;
1236
}
1237
1238
if(quit_now){
1239
goto end;
1240
}
1241
1242
/* Re-raise priviliges */
1243
errno = 0;
1244
ret = seteuid(0);
1245
if(ret == -1){
1246
perror("seteuid");
1247
}
1248
1249
#ifdef __linux__
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
messages about the network interface to mess up the prompt */
1252
ret = klogctl(8, NULL, 5);
1253
bool restore_loglevel = true;
1254
if(ret == -1){
1255
restore_loglevel = false;
1256
perror("klogctl");
1257
}
1258
#endif /* __linux__ */
1259
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1261
if(sd < 0){
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1264
#ifdef __linux__
1265
if(restore_loglevel){
1266
ret = klogctl(7, NULL, 0);
1267
if(ret == -1){
1268
perror("klogctl");
1269
}
1270
}
1271
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
1275
if(ret == -1){
1276
perror("seteuid");
1277
}
1278
goto end;
1279
}
1280
strcpy(network.ifr_name, interface);
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1282
if(ret == -1){
1283
perror("ioctl SIOCGIFFLAGS");
1284
#ifdef __linux__
1285
if(restore_loglevel){
1286
ret = klogctl(7, NULL, 0);
1287
if(ret == -1){
1288
perror("klogctl");
1289
}
1290
}
1291
#endif /* __linux__ */
1292
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1299
goto end;
1300
}
1301
if((network.ifr_flags & IFF_UP) == 0){
1302
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1305
if(ret == -1){
1306
take_down_interface = false;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
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
}
1326
/* sleep checking until interface is running */
1327
for(int i=0; i < delay * 4; i++){
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1329
if(ret == -1){
1330
perror("ioctl SIOCGIFFLAGS");
1331
} else if(network.ifr_flags & IFF_RUNNING){
1332
break;
1333
}
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1335
ret = nanosleep(&sleeptime, NULL);
1336
if(ret == -1 and errno != EINTR){
1337
perror("nanosleep");
1338
}
1339
}
1340
if(not take_down_interface){
1341
/* We won't need the socket anymore */
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1343
if(ret == -1){
1344
perror("close");
1345
}
1346
}
1347
#ifdef __linux__
1348
if(restore_loglevel){
1349
/* Restores kernel loglevel to default */
1350
ret = klogctl(7, NULL, 0);
1351
if(ret == -1){
1352
perror("klogctl");
1353
}
1354
}
1355
#endif /* __linux__ */
1356
/* Lower privileges */
1357
errno = 0;
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
1370
}
1371
}
1372
1373
if(quit_now){
1374
goto end;
1375
}
1376
1377
ret = init_gnutls_global(pubkey, seckey);
1378
if(ret == -1){
1379
fprintf(stderr, "init_gnutls_global failed\n");
1380
exitcode = EXIT_FAILURE;
1381
goto end;
1382
} else {
1383
gnutls_initialized = true;
1384
}
1385
1386
if(quit_now){
1387
goto end;
1388
}
1389
1390
tempdir_created = true;
1391
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1393
perror("mkdtemp");
1394
goto end;
1395
}
1396
1397
if(quit_now){
1398
goto end;
1399
}
1400
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1402
fprintf(stderr, "init_gpgme failed\n");
1403
exitcode = EXIT_FAILURE;
1404
goto end;
1405
} else {
1406
gpgme_initialized = true;
1407
}
1408
1409
if(quit_now){
1410
goto end;
1411
}
1412
1413
if(connect_to != NULL){
1414
/* Connect directly, do not use Zeroconf */
1415
/* (Mainly meant for debugging) */
1416
char *address = strrchr(connect_to, ':');
1417
if(address == NULL){
1418
fprintf(stderr, "No colon in address\n");
1419
exitcode = EXIT_FAILURE;
1420
goto end;
1421
}
1422
1423
if(quit_now){
1424
goto end;
1425
}
1426
1427
uint16_t port;
1428
errno = 0;
1429
tmpmax = strtoimax(address+1, &tmp, 10);
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1431
or tmpmax != (uint16_t)tmpmax){
1432
fprintf(stderr, "Bad port number\n");
1433
exitcode = EXIT_FAILURE;
1434
goto end;
1435
}
1436
1437
if(quit_now){
1438
goto end;
1439
}
1440
1441
port = (uint16_t)tmpmax;
1442
*address = '\0';
1443
address = connect_to;
1444
/* Colon in address indicates IPv6 */
1445
int af;
1446
if(strchr(address, ':') != NULL){
1447
af = AF_INET6;
1448
} else {
1449
af = AF_INET;
1450
}
1451
1452
if(quit_now){
1453
goto end;
1454
}
1455
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
1460
exitcode = EXIT_SUCCESS;
1461
}
1462
goto end;
1463
}
1464
1465
if(quit_now){
1466
goto end;
1467
}
1468
1469
{
1470
AvahiServerConfig config;
1471
/* Do not publish any local Zeroconf records */
1472
avahi_server_config_init(&config);
1473
config.publish_hinfo = 0;
1474
config.publish_addresses = 0;
1475
config.publish_workstation = 0;
1476
config.publish_domain = 0;
1477
1478
/* Allocate a new server */
1479
mc.server = avahi_server_new(avahi_simple_poll_get
1480
(mc.simple_poll), &config, NULL,
1481
NULL, &error);
1482
1483
/* Free the Avahi configuration data */
1484
avahi_server_config_free(&config);
1485
}
1486
1487
/* Check if creating the Avahi server object succeeded */
1488
if(mc.server == NULL){
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1490
avahi_strerror(error));
1491
exitcode = EXIT_FAILURE;
1492
goto end;
1493
}
1494
1495
if(quit_now){
1496
goto end;
1497
}
1498
1499
/* Create the Avahi service browser */
1500
sb = avahi_s_service_browser_new(mc.server, if_index,
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1502
NULL, 0, browse_callback, NULL);
1503
if(sb == NULL){
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1505
avahi_strerror(avahi_server_errno(mc.server)));
1506
exitcode = EXIT_FAILURE;
1507
goto end;
1508
}
1509
1510
if(quit_now){
1511
goto end;
1512
}
1513
1514
/* Run the main loop */
1515
1516
if(debug){
1517
fprintf(stderr, "Starting Avahi loop search\n");
1518
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
1521
1522
end:
1523
1524
if(debug){
1525
fprintf(stderr, "%s exiting\n", argv[0]);
1526
}
1527
1528
/* Cleanup things */
1529
if(sb != NULL)
1530
avahi_s_service_browser_free(sb);
1531
1532
if(mc.server != NULL)
1533
avahi_server_free(mc.server);
1534
1535
if(mc.simple_poll != NULL)
1536
avahi_simple_poll_free(mc.simple_poll);
1537
1538
if(gnutls_initialized){
1539
gnutls_certificate_free_credentials(mc.cred);
1540
gnutls_global_deinit();
1541
gnutls_dh_params_deinit(mc.dh_params);
1542
}
1543
1544
if(gpgme_initialized){
1545
gpgme_release(mc.ctx);
1546
}
1547
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
1551
errno = 0;
1552
ret = seteuid(0);
1553
if(ret == -1){
1554
perror("seteuid");
1555
}
1556
if(geteuid() == 0){
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1558
if(ret == -1){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
960
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
961
1563
if(ret == -1){
962
1564
perror("ioctl SIOCSIFFLAGS");
963
exitcode = EXIT_FAILURE;
964
goto end;
965
}
966
}
967
close(sd);
968
}
969
970
if (not debug){
971
avahi_set_log_function(empty_log);
972
}
973
974
/* Initialize the pseudo-RNG for Avahi */
975
srand((unsigned int) time(NULL));
976
977
/* Allocate main Avahi loop object */
978
mc.simple_poll = avahi_simple_poll_new();
979
if (mc.simple_poll == NULL) {
980
fprintf(stderr, "Avahi: Failed to create simple poll"
981
" object.\n");
982
exitcode = EXIT_FAILURE;
983
goto end;
984
}
985
986
{
987
AvahiServerConfig config;
988
/* Do not publish any local Zeroconf records */
989
avahi_server_config_init(&config);
990
config.publish_hinfo = 0;
991
config.publish_addresses = 0;
992
config.publish_workstation = 0;
993
config.publish_domain = 0;
994
995
/* Allocate a new server */
996
mc.server = avahi_server_new(avahi_simple_poll_get
997
(mc.simple_poll), &config, NULL,
998
NULL, &error);
999
1000
/* Free the Avahi configuration data */
1001
avahi_server_config_free(&config);
1002
}
1003
1004
/* Check if creating the Avahi server object succeeded */
1005
if (mc.server == NULL) {
1006
fprintf(stderr, "Failed to create Avahi server: %s\n",
1007
avahi_strerror(error));
1008
exitcode = EXIT_FAILURE;
1009
goto end;
1010
}
1011
1012
/* Create the Avahi service browser */
1013
sb = avahi_s_service_browser_new(mc.server, if_index,
1014
AVAHI_PROTO_INET6,
1015
"_mandos._tcp", NULL, 0,
1016
browse_callback, &mc);
1017
if (sb == NULL) {
1018
fprintf(stderr, "Failed to create service browser: %s\n",
1019
avahi_strerror(avahi_server_errno(mc.server)));
1020
exitcode = EXIT_FAILURE;
1021
goto end;
1022
}
1023
1024
/* Run the main loop */
1025
1026
if (debug){
1027
fprintf(stderr, "Starting Avahi loop search\n");
1028
}
1029
1030
avahi_simple_poll_loop(mc.simple_poll);
1031
1032
end:
1033
1034
if (debug){
1035
fprintf(stderr, "%s exiting\n", argv[0]);
1036
}
1037
1038
/* Cleanup things */
1039
if (sb != NULL)
1040
avahi_s_service_browser_free(sb);
1041
1042
if (mc.server != NULL)
1043
avahi_server_free(mc.server);
1044
1045
if (mc.simple_poll != NULL)
1046
avahi_simple_poll_free(mc.simple_poll);
1047
free(pubkeyfile);
1048
free(seckeyfile);
1049
1050
if (gnutls_initalized){
1051
gnutls_certificate_free_credentials(mc.cred);
1052
gnutls_global_deinit ();
1053
}
1054
1055
return exitcode;
1565
}
1566
}
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1568
if(ret == -1){
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
1576
}
1577
}
1578
}
1579
1580
/* Removes the temp directory used by GPGME */
1581
if(tempdir_created){
1582
DIR *d;
1583
struct dirent *direntry;
1584
d = opendir(tempdir);
1585
if(d == NULL){
1586
if(errno != ENOENT){
1587
perror("opendir");
1588
}
1589
} else {
1590
while(true){
1591
direntry = readdir(d);
1592
if(direntry == NULL){
1593
break;
1594
}
1595
/* Skip "." and ".." */
1596
if(direntry->d_name[0] == '.'
1597
and (direntry->d_name[1] == '\0'
1598
or (direntry->d_name[1] == '.'
1599
and direntry->d_name[2] == '\0'))){
1600
continue;
1601
}
1602
char *fullname = NULL;
1603
ret = asprintf(&fullname, "%s/%s", tempdir,
1604
direntry->d_name);
1605
if(ret < 0){
1606
perror("asprintf");
1607
continue;
1608
}
1609
ret = remove(fullname);
1610
if(ret == -1){
1611
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1612
strerror(errno));
1613
}
1614
free(fullname);
1615
}
1616
closedir(d);
1617
}
1618
ret = rmdir(tempdir);
1619
if(ret == -1 and errno != ENOENT){
1620
perror("rmdir");
1621
}
1622
}
1623
1624
if(quit_now){
1625
sigemptyset(&old_sigterm_action.sa_mask);
1626
old_sigterm_action.sa_handler = SIG_DFL;
1627
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1628
&old_sigterm_action,
1629
NULL));
1630
if(ret == -1){
1631
perror("sigaction");
1632
}
1633
do {
1634
ret = raise(signal_received);
1635
} while(ret != 0 and errno == EINTR);
1636
if(ret != 0){
1637
perror("raise");
1638
abort();
1639
}
1640
TEMP_FAILURE_RETRY(pause());
1641
}
1642
1643
return exitcode;
1056
1644
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0