To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 195
- compare with another revision
- download diff
- download tarball
- view history from revision 195
- Committer: Teddy Hogeborn
- Date: 2008-09-19 17:30:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20080919173043-oar4cbayx4ow122x
* debian/control (mandos, mandos-client): Depend on "adduser".
(mandos): Removed unused substitution variables.
* debian/mandos-client.postinst (update_initramfs, create_key): Do not
use
"type".
(add_mandos_user): Do not call the user "Mandos password daemon".
* debian/mandos.postinst (add_mandos_user): - '' -
* debian/mandos-client.postrm (purge): Do not use "type". Do not
remove config directories; this
is done automatically.
(mandos): Removed unused substitution variables.
* debian/mandos-client.postinst (update_initramfs, create_key): Do not
use
"type".
(add_mandos_user): Do not call the user "Mandos password daemon".
* debian/mandos.postinst (add_mandos_user): - '' -
* debian/mandos-client.postrm (purge): Do not use "type". Do not
remove config directories; this
is done automatically.
- files added:
- etc-plugins.d-README
- files removed:
- NEWS
- debian/po
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
13
*
15
14
* This program is free software: you can redistribute it and/or
16
15
* modify it under the terms of the GNU General Public License as
30
29
*/
31
30
32
31
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
32
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
33
#define _FILE_OFFSET_BITS 64
38
#endif
39
34
40
35
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
36
42
37
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
38
stdout, ferror() */
44
39
#include <stdint.h> /* uint16_t, uint32_t */
45
40
#include <stddef.h> /* NULL, size_t, ssize_t */
46
41
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
42
srand() */
43
#include <stdbool.h> /* bool, true */
49
44
#include <string.h> /* memset(), strcmp(), strlen(),
50
45
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
46
#include <sys/ioctl.h> /* ioctl */
52
47
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
48
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
49
SOCK_STREAM, INET6_ADDRSTRLEN,
50
uid_t, gid_t, open(), opendir(), DIR */
56
51
#include <sys/stat.h> /* open() */
57
52
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
53
struct in6_addr, inet_pton(),
54
connect() */
59
55
#include <fcntl.h> /* open() */
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
56
#include <dirent.h> /* opendir(), struct dirent, readdir() */
57
#include <inttypes.h> /* PRIu16 */
64
58
#include <assert.h> /* assert() */
65
59
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
60
#include <time.h> /* time() */
67
61
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
62
SIOCSIFFLAGS, if_indextoname(),
69
63
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
64
#include <netinet/in.h>
73
65
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
66
getuid(), getgid(), setuid(),
75
67
setgid() */
76
68
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
69
#include <iso646.h> /* not, and */
78
70
#include <argp.h> /* struct argp_option, error_t, struct
79
71
argp_state, struct argp,
80
72
argp_parse(), ARGP_KEY_ARG,
81
73
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sigaction,
84
sig_atomic_t */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
74
90
75
/* Avahi */
91
76
/* All Avahi types, constants and functions
104
89
gnutls_*
105
90
init_gnutls_session(),
106
91
GNUTLS_* */
107
#include <gnutls/openpgp.h>
108
/* gnutls_certificate_set_openpgp_key_file(),
92
#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),
109
93
GNUTLS_OPENPGP_FMT_BASE64 */
110
94
111
95
/* GPGME */
117
101
118
102
#define BUFFER_SIZE 256
119
103
104
/*
105
#define PATHDIR "/conf/conf.d/mandos"
106
*/
107
120
108
#define PATHDIR "/conf/conf.d/mandos"
121
109
#define SECKEY "seckey.txt"
122
110
#define PUBKEY "pubkey.txt"
123
111
124
112
bool debug = false;
125
113
static const char mandos_protocol_version[] = "1";
126
const char *argp_program_version = "mandos-client " VERSION;
114
const char *argp_program_version = "mandos-client 1.0";
127
115
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
128
116
129
117
/* Used for passing in values through the Avahi callback functions */
137
125
gpgme_ctx_t ctx;
138
126
} mandos_context;
139
127
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
145
128
/*
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
148
131
* "buffer_length" is how much is already used.
149
132
*/
150
size_t incbuffer(char **buffer, size_t buffer_length,
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
151
134
size_t buffer_capacity){
152
if(buffer_length + BUFFER_SIZE > buffer_capacity){
135
if (buffer_length + BUFFER_SIZE > buffer_capacity){
153
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
154
if(buffer == NULL){
137
if (buffer == NULL){
155
138
return 0;
156
139
}
157
140
buffer_capacity += BUFFER_SIZE;
162
145
/*
163
146
* Initialize GPGME.
164
147
*/
165
static bool init_gpgme(const char *seckey,
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
166
149
const char *pubkey, const char *tempdir){
167
150
int ret;
168
151
gpgme_error_t rc;
170
153
171
154
172
155
/*
173
* Helper function to insert pub and seckey to the engine keyring.
156
* Helper function to insert pub and seckey to the enigne keyring.
174
157
*/
175
158
bool import_key(const char *filename){
176
159
int fd;
177
160
gpgme_data_t pgp_data;
178
161
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
162
fd = TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
180
163
if(fd == -1){
181
164
perror("open");
182
165
return false;
183
166
}
184
167
185
168
rc = gpgme_data_new_from_fd(&pgp_data, fd);
186
if(rc != GPG_ERR_NO_ERROR){
169
if (rc != GPG_ERR_NO_ERROR){
187
170
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
188
171
gpgme_strsource(rc), gpgme_strerror(rc));
189
172
return false;
190
173
}
191
174
192
rc = gpgme_op_import(mc.ctx, pgp_data);
193
if(rc != GPG_ERR_NO_ERROR){
175
rc = gpgme_op_import(mc->ctx, pgp_data);
176
if (rc != GPG_ERR_NO_ERROR){
194
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
178
gpgme_strsource(rc), gpgme_strerror(rc));
196
179
return false;
197
180
}
198
181
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
182
ret = TEMP_FAILURE_RETRY(close(fd));
200
183
if(ret == -1){
201
184
perror("close");
202
185
}
204
187
return true;
205
188
}
206
189
207
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
190
if (debug){
191
fprintf(stderr, "Initialize gpgme\n");
209
192
}
210
193
211
194
/* Init GPGME */
212
195
gpgme_check_version(NULL);
213
196
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
214
if(rc != GPG_ERR_NO_ERROR){
197
if (rc != GPG_ERR_NO_ERROR){
215
198
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
216
199
gpgme_strsource(rc), gpgme_strerror(rc));
217
200
return false;
218
201
}
219
202
220
203
/* Set GPGME home directory for the OpenPGP engine only */
221
rc = gpgme_get_engine_info(&engine_info);
222
if(rc != GPG_ERR_NO_ERROR){
204
rc = gpgme_get_engine_info (&engine_info);
205
if (rc != GPG_ERR_NO_ERROR){
223
206
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
224
207
gpgme_strsource(rc), gpgme_strerror(rc));
225
208
return false;
238
221
}
239
222
240
223
/* Create new GPGME "context" */
241
rc = gpgme_new(&(mc.ctx));
242
if(rc != GPG_ERR_NO_ERROR){
224
rc = gpgme_new(&(mc->ctx));
225
if (rc != GPG_ERR_NO_ERROR){
243
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
227
gpgme_strsource(rc), gpgme_strerror(rc));
245
228
return false;
246
229
}
247
230
248
if(not import_key(pubkey) or not import_key(seckey)){
231
if (not import_key(pubkey) or not import_key(seckey)){
249
232
return false;
250
233
}
251
234
256
239
* Decrypt OpenPGP data.
257
240
* Returns -1 on error
258
241
*/
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
260
size_t crypto_size,
261
char **plaintext){
242
static ssize_t pgp_packet_decrypt (const mandos_context *mc,
243
const char *cryptotext,
244
size_t crypto_size,
245
char **plaintext){
262
246
gpgme_data_t dh_crypto, dh_plain;
263
247
gpgme_error_t rc;
264
248
ssize_t ret;
265
249
size_t plaintext_capacity = 0;
266
250
ssize_t plaintext_length = 0;
267
251
268
if(debug){
252
if (debug){
269
253
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
270
254
}
271
255
272
256
/* Create new GPGME data buffer from memory cryptotext */
273
257
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
274
258
0);
275
if(rc != GPG_ERR_NO_ERROR){
259
if (rc != GPG_ERR_NO_ERROR){
276
260
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
277
261
gpgme_strsource(rc), gpgme_strerror(rc));
278
262
return -1;
280
264
281
265
/* Create new empty GPGME data buffer for the plaintext */
282
266
rc = gpgme_data_new(&dh_plain);
283
if(rc != GPG_ERR_NO_ERROR){
267
if (rc != GPG_ERR_NO_ERROR){
284
268
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
285
269
gpgme_strsource(rc), gpgme_strerror(rc));
286
270
gpgme_data_release(dh_crypto);
289
273
290
274
/* Decrypt data from the cryptotext data buffer to the plaintext
291
275
data buffer */
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
293
if(rc != GPG_ERR_NO_ERROR){
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
277
if (rc != GPG_ERR_NO_ERROR){
294
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
279
gpgme_strsource(rc), gpgme_strerror(rc));
296
280
plaintext_length = -1;
297
if(debug){
281
if (debug){
298
282
gpgme_decrypt_result_t result;
299
result = gpgme_op_decrypt_result(mc.ctx);
300
if(result == NULL){
283
result = gpgme_op_decrypt_result(mc->ctx);
284
if (result == NULL){
301
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
302
286
} else {
303
287
fprintf(stderr, "Unsupported algorithm: %s\n",
330
314
}
331
315
332
316
/* Seek back to the beginning of the GPGME plaintext data buffer */
333
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
317
if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){
334
318
perror("gpgme_data_seek");
335
319
plaintext_length = -1;
336
320
goto decrypt_end;
338
322
339
323
*plaintext = NULL;
340
324
while(true){
341
plaintext_capacity = incbuffer(plaintext,
325
plaintext_capacity = adjustbuffer(plaintext,
342
326
(size_t)plaintext_length,
343
327
plaintext_capacity);
344
if(plaintext_capacity == 0){
345
perror("incbuffer");
328
if (plaintext_capacity == 0){
329
perror("adjustbuffer");
346
330
plaintext_length = -1;
347
331
goto decrypt_end;
348
332
}
350
334
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
351
335
BUFFER_SIZE);
352
336
/* Print the data, if any */
353
if(ret == 0){
337
if (ret == 0){
354
338
/* EOF */
355
339
break;
356
340
}
380
364
return plaintext_length;
381
365
}
382
366
383
static const char * safer_gnutls_strerror(int value){
384
const char *ret = gnutls_strerror(value); /* Spurious warning from
385
-Wunreachable-code */
386
if(ret == NULL)
367
static const char * safer_gnutls_strerror (int value) {
368
const char *ret = gnutls_strerror (value); /* Spurious warning */
369
if (ret == NULL)
387
370
ret = "(unknown)";
388
371
return ret;
389
372
}
394
377
fprintf(stderr, "GnuTLS: %s", string);
395
378
}
396
379
397
static int init_gnutls_global(const char *pubkeyfilename,
380
static int init_gnutls_global(mandos_context *mc,
381
const char *pubkeyfilename,
398
382
const char *seckeyfilename){
399
383
int ret;
400
384
403
387
}
404
388
405
389
ret = gnutls_global_init();
406
if(ret != GNUTLS_E_SUCCESS){
407
fprintf(stderr, "GnuTLS global_init: %s\n",
408
safer_gnutls_strerror(ret));
390
if (ret != GNUTLS_E_SUCCESS) {
391
fprintf (stderr, "GnuTLS global_init: %s\n",
392
safer_gnutls_strerror(ret));
409
393
return -1;
410
394
}
411
395
412
if(debug){
396
if (debug){
413
397
/* "Use a log level over 10 to enable all debugging options."
414
398
* - GnuTLS manual
415
399
*/
418
402
}
419
403
420
404
/* OpenPGP credentials */
421
gnutls_certificate_allocate_credentials(&mc.cred);
422
if(ret != GNUTLS_E_SUCCESS){
423
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
424
from
425
-Wunreachable-code
426
*/
427
safer_gnutls_strerror(ret));
428
gnutls_global_deinit();
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 ();
429
411
return -1;
430
412
}
431
413
436
418
}
437
419
438
420
ret = gnutls_certificate_set_openpgp_key_file
439
(mc.cred, pubkeyfilename, seckeyfilename,
421
(mc->cred, pubkeyfilename, seckeyfilename,
440
422
GNUTLS_OPENPGP_FMT_BASE64);
441
if(ret != GNUTLS_E_SUCCESS){
423
if (ret != GNUTLS_E_SUCCESS) {
442
424
fprintf(stderr,
443
425
"Error[%d] while reading the OpenPGP key pair ('%s',"
444
426
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
448
430
}
449
431
450
432
/* GnuTLS server initialization */
451
ret = gnutls_dh_params_init(&mc.dh_params);
452
if(ret != GNUTLS_E_SUCCESS){
453
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
454
" %s\n", safer_gnutls_strerror(ret));
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));
455
437
goto globalfail;
456
438
}
457
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
458
if(ret != GNUTLS_E_SUCCESS){
459
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
460
safer_gnutls_strerror(ret));
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));
461
443
goto globalfail;
462
444
}
463
445
464
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
446
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
465
447
466
448
return 0;
467
449
468
450
globalfail:
469
451
470
gnutls_certificate_free_credentials(mc.cred);
452
gnutls_certificate_free_credentials(mc->cred);
471
453
gnutls_global_deinit();
472
gnutls_dh_params_deinit(mc.dh_params);
454
gnutls_dh_params_deinit(mc->dh_params);
473
455
return -1;
474
456
}
475
457
476
static int init_gnutls_session(gnutls_session_t *session){
458
static int init_gnutls_session(mandos_context *mc,
459
gnutls_session_t *session){
477
460
int ret;
478
461
/* GnuTLS session creation */
479
462
ret = gnutls_init(session, GNUTLS_SERVER);
480
if(ret != GNUTLS_E_SUCCESS){
463
if (ret != GNUTLS_E_SUCCESS){
481
464
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
482
465
safer_gnutls_strerror(ret));
483
466
}
484
467
485
468
{
486
469
const char *err;
487
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
488
if(ret != GNUTLS_E_SUCCESS){
470
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
471
if (ret != GNUTLS_E_SUCCESS) {
489
472
fprintf(stderr, "Syntax error at: %s\n", err);
490
473
fprintf(stderr, "GnuTLS error: %s\n",
491
474
safer_gnutls_strerror(ret));
492
gnutls_deinit(*session);
475
gnutls_deinit (*session);
493
476
return -1;
494
477
}
495
478
}
496
479
497
480
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
498
mc.cred);
499
if(ret != GNUTLS_E_SUCCESS){
481
mc->cred);
482
if (ret != GNUTLS_E_SUCCESS) {
500
483
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
501
484
safer_gnutls_strerror(ret));
502
gnutls_deinit(*session);
485
gnutls_deinit (*session);
503
486
return -1;
504
487
}
505
488
506
489
/* ignore client certificate if any. */
507
gnutls_certificate_server_set_request(*session,
508
GNUTLS_CERT_IGNORE);
490
gnutls_certificate_server_set_request (*session,
491
GNUTLS_CERT_IGNORE);
509
492
510
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
493
gnutls_dh_set_prime_bits (*session, mc->dh_bits);
511
494
512
495
return 0;
513
496
}
519
502
/* Called when a Mandos server is found */
520
503
static int start_mandos_communication(const char *ip, uint16_t port,
521
504
AvahiIfIndex if_index,
522
int af){
505
mandos_context *mc){
523
506
int ret, tcp_sd;
524
ssize_t sret;
525
union {
526
struct sockaddr_in in;
527
struct sockaddr_in6 in6;
528
} to;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
529
508
char *buffer = NULL;
530
509
char *decrypted_buffer;
531
510
size_t buffer_length = 0;
533
512
ssize_t decrypted_buffer_size;
534
513
size_t written;
535
514
int retval = 0;
515
char interface[IF_NAMESIZE];
536
516
gnutls_session_t session;
537
int pf; /* Protocol family */
538
539
switch(af){
540
case AF_INET6:
541
pf = PF_INET6;
542
break;
543
case AF_INET:
544
pf = PF_INET;
545
break;
546
default:
547
fprintf(stderr, "Bad address family: %d\n", af);
548
return -1;
549
}
550
551
ret = init_gnutls_session(&session);
552
if(ret != 0){
517
518
ret = init_gnutls_session (mc, &session);
519
if (ret != 0){
553
520
return -1;
554
521
}
555
522
556
523
if(debug){
557
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
558
525
"\n", ip, port);
559
526
}
560
527
561
tcp_sd = socket(pf, SOCK_STREAM, 0);
562
if(tcp_sd < 0){
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
529
if(tcp_sd < 0) {
563
530
perror("socket");
564
531
return -1;
565
532
}
566
533
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);
540
}
541
567
542
memset(&to, 0, sizeof(to));
568
if(af == AF_INET6){
569
to.in6.sin6_family = (sa_family_t)af;
570
ret = inet_pton(af, ip, &to.in6.sin6_addr);
571
} else { /* IPv4 */
572
to.in.sin_family = (sa_family_t)af;
573
ret = inet_pton(af, ip, &to.in.sin_addr);
574
}
575
if(ret < 0 ){
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 ){
576
548
perror("inet_pton");
577
549
return -1;
578
550
}
580
552
fprintf(stderr, "Bad address: %s\n", ip);
581
553
return -1;
582
554
}
583
if(af == AF_INET6){
584
to.in6.sin6_port = htons(port); /* Spurious warnings from
585
-Wconversion and
586
-Wunreachable-code */
587
588
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
589
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
590
-Wunreachable-code*/
591
if(if_index == AVAHI_IF_UNSPEC){
592
fprintf(stderr, "An IPv6 link-local address is incomplete"
593
" without a network interface\n");
594
return -1;
595
}
596
/* Set the network interface number as scope */
597
to.in6.sin6_scope_id = (uint32_t)if_index;
598
}
599
} else {
600
to.in.sin_port = htons(port); /* Spurious warnings from
601
-Wconversion and
602
-Wunreachable-code */
603
}
555
to.in6.sin6_port = htons(port); /* Spurious warning */
556
557
to.in6.sin6_scope_id = (uint32_t)if_index;
604
558
605
559
if(debug){
606
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
607
char interface[IF_NAMESIZE];
608
if(if_indextoname((unsigned int)if_index, interface) == NULL){
609
perror("if_indextoname");
610
} else {
611
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
612
ip, interface, port);
613
}
614
} else {
615
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
616
port);
617
}
618
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
619
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
620
const char *pcret;
621
if(af == AF_INET6){
622
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
623
sizeof(addrstr));
624
} else {
625
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
626
sizeof(addrstr));
627
}
628
if(pcret == NULL){
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){
629
565
perror("inet_ntop");
630
566
} else {
631
567
if(strcmp(addrstr, ip) != 0){
634
570
}
635
571
}
636
572
637
if(af == AF_INET6){
638
ret = connect(tcp_sd, &to.in6, sizeof(to));
639
} else {
640
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
641
}
642
if(ret < 0){
573
ret = connect(tcp_sd, &to.in, sizeof(to));
574
if (ret < 0){
643
575
perror("connect");
644
576
return -1;
645
577
}
646
578
647
579
const char *out = mandos_protocol_version;
648
580
written = 0;
649
while(true){
581
while (true){
650
582
size_t out_size = strlen(out);
651
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
652
584
out_size - written));
653
if(ret == -1){
585
if (ret == -1){
654
586
perror("write");
655
587
retval = -1;
656
588
goto mandos_end;
659
591
if(written < out_size){
660
592
continue;
661
593
} else {
662
if(out == mandos_protocol_version){
594
if (out == mandos_protocol_version){
663
595
written = 0;
664
596
out = "\r\n";
665
597
} else {
672
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
673
605
}
674
606
675
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
676
608
677
609
do{
678
ret = gnutls_handshake(session);
610
ret = gnutls_handshake (session);
679
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
680
612
681
if(ret != GNUTLS_E_SUCCESS){
613
if (ret != GNUTLS_E_SUCCESS){
682
614
if(debug){
683
615
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
684
gnutls_perror(ret);
616
gnutls_perror (ret);
685
617
}
686
618
retval = -1;
687
619
goto mandos_end;
690
622
/* Read OpenPGP packet that contains the wanted password */
691
623
692
624
if(debug){
693
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
694
626
ip);
695
627
}
696
628
697
629
while(true){
698
buffer_capacity = incbuffer(&buffer, buffer_length,
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
699
631
buffer_capacity);
700
if(buffer_capacity == 0){
701
perror("incbuffer");
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
702
634
retval = -1;
703
635
goto mandos_end;
704
636
}
705
637
706
sret = gnutls_record_recv(session, buffer+buffer_length,
707
BUFFER_SIZE);
708
if(sret == 0){
638
ret = gnutls_record_recv(session, buffer+buffer_length,
639
BUFFER_SIZE);
640
if (ret == 0){
709
641
break;
710
642
}
711
if(sret < 0){
712
switch(sret){
643
if (ret < 0){
644
switch(ret){
713
645
case GNUTLS_E_INTERRUPTED:
714
646
case GNUTLS_E_AGAIN:
715
647
break;
716
648
case GNUTLS_E_REHANDSHAKE:
717
649
do{
718
ret = gnutls_handshake(session);
650
ret = gnutls_handshake (session);
719
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
720
if(ret < 0){
652
if (ret < 0){
721
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
722
gnutls_perror(ret);
654
gnutls_perror (ret);
723
655
retval = -1;
724
656
goto mandos_end;
725
657
}
728
660
fprintf(stderr, "Unknown error while reading data from"
729
661
" encrypted session with Mandos server\n");
730
662
retval = -1;
731
gnutls_bye(session, GNUTLS_SHUT_RDWR);
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
732
664
goto mandos_end;
733
665
}
734
666
} else {
735
buffer_length += (size_t) sret;
667
buffer_length += (size_t) ret;
736
668
}
737
669
}
738
670
740
672
fprintf(stderr, "Closing TLS session\n");
741
673
}
742
674
743
gnutls_bye(session, GNUTLS_SHUT_RDWR);
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
744
676
745
if(buffer_length > 0){
746
decrypted_buffer_size = pgp_packet_decrypt(buffer,
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
747
679
buffer_length,
748
680
&decrypted_buffer);
749
if(decrypted_buffer_size >= 0){
681
if (decrypted_buffer_size >= 0){
750
682
written = 0;
751
683
while(written < (size_t) decrypted_buffer_size){
752
ret = (int)fwrite(decrypted_buffer + written, 1,
753
(size_t)decrypted_buffer_size - written,
754
stdout);
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
686
stdout);
755
687
if(ret == 0 and ferror(stdout)){
756
688
if(debug){
757
689
fprintf(stderr, "Error writing encrypted data: %s\n",
774
706
775
707
mandos_end:
776
708
free(buffer);
777
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
778
710
if(ret == -1){
779
711
perror("close");
780
712
}
781
gnutls_deinit(session);
713
gnutls_deinit (session);
782
714
return retval;
783
715
}
784
716
785
717
static void resolve_callback(AvahiSServiceResolver *r,
786
718
AvahiIfIndex interface,
787
AvahiProtocol proto,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
788
720
AvahiResolverEvent event,
789
721
const char *name,
790
722
const char *type,
795
727
AVAHI_GCC_UNUSED AvahiStringList *txt,
796
728
AVAHI_GCC_UNUSED AvahiLookupResultFlags
797
729
flags,
798
AVAHI_GCC_UNUSED void* userdata){
730
void* userdata) {
731
mandos_context *mc = userdata;
799
732
assert(r);
800
733
801
734
/* Called whenever a service has been resolved successfully or
802
735
timed out */
803
736
804
switch(event){
737
switch (event) {
805
738
default:
806
739
case AVAHI_RESOLVER_FAILURE:
807
740
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
808
741
" of type '%s' in domain '%s': %s\n", name, type, domain,
809
avahi_strerror(avahi_server_errno(mc.server)));
742
avahi_strerror(avahi_server_errno(mc->server)));
810
743
break;
811
744
812
745
case AVAHI_RESOLVER_FOUND:
815
748
avahi_address_snprint(ip, sizeof(ip), address);
816
749
if(debug){
817
750
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
818
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
819
ip, (intmax_t)interface, port);
751
PRIu16 ") on port %d\n", name, host_name, ip,
752
interface, port);
820
753
}
821
int ret = start_mandos_communication(ip, port, interface,
822
avahi_proto_to_af(proto));
823
if(ret == 0){
824
avahi_simple_poll_quit(mc.simple_poll);
754
int ret = start_mandos_communication(ip, port, interface, mc);
755
if (ret == 0){
756
avahi_simple_poll_quit(mc->simple_poll);
825
757
}
826
758
}
827
759
}
828
760
avahi_s_service_resolver_free(r);
829
761
}
830
762
831
static void browse_callback(AvahiSServiceBrowser *b,
832
AvahiIfIndex interface,
833
AvahiProtocol protocol,
834
AvahiBrowserEvent event,
835
const char *name,
836
const char *type,
837
const char *domain,
838
AVAHI_GCC_UNUSED AvahiLookupResultFlags
839
flags,
840
AVAHI_GCC_UNUSED void* userdata){
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;
841
774
assert(b);
842
775
843
776
/* Called whenever a new services becomes available on the LAN or
844
777
is removed from the LAN */
845
778
846
switch(event){
779
switch (event) {
847
780
default:
848
781
case AVAHI_BROWSER_FAILURE:
849
782
850
783
fprintf(stderr, "(Avahi browser) %s\n",
851
avahi_strerror(avahi_server_errno(mc.server)));
852
avahi_simple_poll_quit(mc.simple_poll);
784
avahi_strerror(avahi_server_errno(mc->server)));
785
avahi_simple_poll_quit(mc->simple_poll);
853
786
return;
854
787
855
788
case AVAHI_BROWSER_NEW:
858
791
the callback function is called the Avahi server will free the
859
792
resolver for us. */
860
793
861
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
862
name, type, domain, protocol, 0,
863
resolve_callback, NULL) == NULL)
794
if (!(avahi_s_service_resolver_new(mc->server, interface,
795
protocol, name, type, domain,
796
AVAHI_PROTO_INET6, 0,
797
resolve_callback, mc)))
864
798
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
865
name, avahi_strerror(avahi_server_errno(mc.server)));
799
name, avahi_strerror(avahi_server_errno(mc->server)));
866
800
break;
867
801
868
802
case AVAHI_BROWSER_REMOVE:
877
811
}
878
812
}
879
813
880
sig_atomic_t quit_now = 0;
881
882
/* stop main loop after sigterm has been called */
883
static void handle_sigterm(__attribute__((unused)) int sig){
884
if(quit_now){
885
return;
886
}
887
quit_now = 1;
888
int old_errno = errno;
889
if(mc.simple_poll != NULL){
890
avahi_simple_poll_quit(mc.simple_poll);
891
}
892
errno = old_errno;
893
}
894
895
814
int main(int argc, char *argv[]){
896
AvahiSServiceBrowser *sb = NULL;
897
int error;
898
int ret;
899
intmax_t tmpmax;
900
char *tmp;
901
int exitcode = EXIT_SUCCESS;
902
const char *interface = "eth0";
903
struct ifreq network;
904
int sd;
905
uid_t uid;
906
gid_t gid;
907
char *connect_to = NULL;
908
char tempdir[] = "/tmp/mandosXXXXXX";
909
bool tempdir_created = false;
910
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
911
const char *seckey = PATHDIR "/" SECKEY;
912
const char *pubkey = PATHDIR "/" PUBKEY;
913
914
bool gnutls_initialized = false;
915
bool gpgme_initialized = false;
916
float delay = 2.5f;
917
918
struct sigaction old_sigterm_action;
919
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
920
921
{
922
struct argp_option options[] = {
923
{ .name = "debug", .key = 128,
924
.doc = "Debug mode", .group = 3 },
925
{ .name = "connect", .key = 'c',
926
.arg = "ADDRESS:PORT",
927
.doc = "Connect directly to a specific Mandos server",
928
.group = 1 },
929
{ .name = "interface", .key = 'i',
930
.arg = "NAME",
931
.doc = "Network interface that will be used to search for"
932
" Mandos servers",
933
.group = 1 },
934
{ .name = "seckey", .key = 's',
935
.arg = "FILE",
936
.doc = "OpenPGP secret key file base name",
937
.group = 1 },
938
{ .name = "pubkey", .key = 'p',
939
.arg = "FILE",
940
.doc = "OpenPGP public key file base name",
941
.group = 2 },
942
{ .name = "dh-bits", .key = 129,
943
.arg = "BITS",
944
.doc = "Bit length of the prime number used in the"
945
" Diffie-Hellman key exchange",
946
.group = 2 },
947
{ .name = "priority", .key = 130,
948
.arg = "STRING",
949
.doc = "GnuTLS priority string for the TLS handshake",
950
.group = 1 },
951
{ .name = "delay", .key = 131,
952
.arg = "SECONDS",
953
.doc = "Maximum delay to wait for interface startup",
954
.group = 2 },
955
{ .name = NULL }
956
};
957
958
error_t parse_opt(int key, char *arg,
959
struct argp_state *state){
960
switch(key){
961
case 128: /* --debug */
962
debug = true;
963
break;
964
case 'c': /* --connect */
965
connect_to = arg;
966
break;
967
case 'i': /* --interface */
968
interface = arg;
969
break;
970
case 's': /* --seckey */
971
seckey = arg;
972
break;
973
case 'p': /* --pubkey */
974
pubkey = arg;
975
break;
976
case 129: /* --dh-bits */
977
errno = 0;
978
tmpmax = strtoimax(arg, &tmp, 10);
979
if(errno != 0 or tmp == arg or *tmp != '\0'
980
or tmpmax != (typeof(mc.dh_bits))tmpmax){
981
fprintf(stderr, "Bad number of DH bits\n");
982
exit(EXIT_FAILURE);
983
}
984
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
985
break;
986
case 130: /* --priority */
987
mc.priority = arg;
988
break;
989
case 131: /* --delay */
990
errno = 0;
991
delay = strtof(arg, &tmp);
992
if(errno != 0 or tmp == arg or *tmp != '\0'){
993
fprintf(stderr, "Bad delay\n");
994
exit(EXIT_FAILURE);
995
}
996
break;
997
case ARGP_KEY_ARG:
998
argp_usage(state);
999
case ARGP_KEY_END:
1000
break;
1001
default:
1002
return ARGP_ERR_UNKNOWN;
1003
}
1004
return 0;
1005
}
1006
1007
struct argp argp = { .options = options, .parser = parse_opt,
1008
.args_doc = "",
1009
.doc = "Mandos client -- Get and decrypt"
1010
" passwords from a Mandos server" };
1011
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1012
if(ret == ARGP_ERR_UNKNOWN){
1013
fprintf(stderr, "Unknown error while parsing arguments\n");
1014
exitcode = EXIT_FAILURE;
1015
goto end;
1016
}
1017
}
1018
1019
if(not debug){
1020
avahi_set_log_function(empty_log);
1021
}
1022
1023
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1024
from the signal handler */
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if(mc.simple_poll == NULL){
1029
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1030
exitcode = EXIT_FAILURE;
1031
goto end;
1032
}
1033
1034
sigemptyset(&sigterm_action.sa_mask);
1035
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1036
if(ret == -1){
1037
perror("sigaddset");
1038
exitcode = EXIT_FAILURE;
1039
goto end;
1040
}
1041
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1042
if(ret == -1){
1043
perror("sigaddset");
1044
exitcode = EXIT_FAILURE;
1045
goto end;
1046
}
1047
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1048
if(ret == -1){
1049
perror("sigaddset");
1050
exitcode = EXIT_FAILURE;
1051
goto end;
1052
}
1053
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1054
if(ret == -1){
1055
perror("sigaction");
1056
exitcode = EXIT_FAILURE;
1057
goto end;
1058
}
1059
1060
/* If the interface is down, bring it up */
1061
if(interface[0] != '\0'){
1062
#ifdef __linux__
1063
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1064
messages to mess up the prompt */
1065
ret = klogctl(8, NULL, 5);
1066
bool restore_loglevel = true;
1067
if(ret == -1){
1068
restore_loglevel = false;
1069
perror("klogctl");
1070
}
1071
#endif /* __linux__ */
1072
1073
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1074
if(sd < 0){
1075
perror("socket");
1076
exitcode = EXIT_FAILURE;
1077
#ifdef __linux__
1078
if(restore_loglevel){
1079
ret = klogctl(7, NULL, 0);
1080
if(ret == -1){
1081
perror("klogctl");
1082
}
1083
}
1084
#endif /* __linux__ */
1085
goto end;
1086
}
1087
strcpy(network.ifr_name, interface);
1088
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1089
if(ret == -1){
1090
perror("ioctl SIOCGIFFLAGS");
1091
#ifdef __linux__
1092
if(restore_loglevel){
1093
ret = klogctl(7, NULL, 0);
1094
if(ret == -1){
1095
perror("klogctl");
1096
}
1097
}
1098
#endif /* __linux__ */
1099
exitcode = EXIT_FAILURE;
1100
goto end;
1101
}
1102
if((network.ifr_flags & IFF_UP) == 0){
1103
network.ifr_flags |= IFF_UP;
1104
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1105
if(ret == -1){
1106
perror("ioctl SIOCSIFFLAGS");
1107
exitcode = EXIT_FAILURE;
1108
#ifdef __linux__
1109
if(restore_loglevel){
1110
ret = klogctl(7, NULL, 0);
1111
if(ret == -1){
1112
perror("klogctl");
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);
1113
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;
1114
906
}
1115
#endif /* __linux__ */
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;
1116
918
goto end;
1117
919
}
1118
920
}
1119
/* sleep checking until interface is running */
1120
for(int i=0; i < delay * 4; i++){
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);
1121
931
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1122
932
if(ret == -1){
1123
933
perror("ioctl SIOCGIFFLAGS");
1124
} else if(network.ifr_flags & IFF_RUNNING){
1125
break;
1126
}
1127
struct timespec sleeptime = { .tv_nsec = 250000000 };
1128
ret = nanosleep(&sleeptime, NULL);
1129
if(ret == -1 and errno != EINTR){
1130
perror("nanosleep");
1131
}
1132
}
1133
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1134
if(ret == -1){
1135
perror("close");
1136
}
1137
#ifdef __linux__
1138
if(restore_loglevel){
1139
/* Restores kernel loglevel to default */
1140
ret = klogctl(7, NULL, 0);
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));
1141
947
if(ret == -1){
1142
perror("klogctl");
948
perror("close");
1143
949
}
1144
950
}
1145
#endif /* __linux__ */
1146
}
1147
1148
uid = getuid();
1149
gid = getgid();
1150
1151
errno = 0;
1152
setgid(gid);
1153
if(ret == -1){
1154
perror("setgid");
1155
}
1156
1157
ret = setuid(uid);
1158
if(ret == -1){
1159
perror("setuid");
1160
}
1161
1162
ret = init_gnutls_global(pubkey, seckey);
1163
if(ret == -1){
1164
fprintf(stderr, "init_gnutls_global failed\n");
1165
exitcode = EXIT_FAILURE;
1166
goto end;
1167
} else {
1168
gnutls_initialized = true;
1169
}
1170
1171
if(mkdtemp(tempdir) == NULL){
1172
perror("mkdtemp");
1173
goto end;
1174
}
1175
tempdir_created = true;
1176
1177
if(not init_gpgme(pubkey, seckey, tempdir)){
1178
fprintf(stderr, "init_gpgme failed\n");
1179
exitcode = EXIT_FAILURE;
1180
goto end;
1181
} else {
1182
gpgme_initialized = true;
1183
}
1184
1185
if(interface[0] != '\0'){
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
1186
988
if_index = (AvahiIfIndex) if_nametoindex(interface);
1187
989
if(if_index == 0){
1188
990
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1189
exitcode = EXIT_FAILURE;
1190
goto end;
1191
}
1192
}
1193
1194
if(connect_to != NULL){
1195
/* Connect directly, do not use Zeroconf */
1196
/* (Mainly meant for debugging) */
1197
char *address = strrchr(connect_to, ':');
1198
if(address == NULL){
1199
fprintf(stderr, "No colon in address\n");
1200
exitcode = EXIT_FAILURE;
1201
goto end;
1202
}
1203
uint16_t port;
1204
errno = 0;
1205
tmpmax = strtoimax(address+1, &tmp, 10);
1206
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1207
or tmpmax != (uint16_t)tmpmax){
1208
fprintf(stderr, "Bad port number\n");
1209
exitcode = EXIT_FAILURE;
1210
goto end;
1211
}
1212
port = (uint16_t)tmpmax;
1213
*address = '\0';
1214
address = connect_to;
1215
/* Colon in address indicates IPv6 */
1216
int af;
1217
if(strchr(address, ':') != NULL){
1218
af = AF_INET6;
1219
} else {
1220
af = AF_INET;
1221
}
1222
ret = start_mandos_communication(address, port, if_index, af);
1223
if(ret < 0){
1224
exitcode = EXIT_FAILURE;
1225
} else {
1226
exitcode = EXIT_SUCCESS;
1227
}
1228
goto end;
1229
}
1230
1231
{
1232
AvahiServerConfig config;
1233
/* Do not publish any local Zeroconf records */
1234
avahi_server_config_init(&config);
1235
config.publish_hinfo = 0;
1236
config.publish_addresses = 0;
1237
config.publish_workstation = 0;
1238
config.publish_domain = 0;
1239
1240
/* Allocate a new server */
1241
mc.server = avahi_server_new(avahi_simple_poll_get
1242
(mc.simple_poll), &config, NULL,
1243
NULL, &error);
1244
1245
/* Free the Avahi configuration data */
1246
avahi_server_config_free(&config);
1247
}
1248
1249
/* Check if creating the Avahi server object succeeded */
1250
if(mc.server == NULL){
1251
fprintf(stderr, "Failed to create Avahi server: %s\n",
1252
avahi_strerror(error));
1253
exitcode = EXIT_FAILURE;
1254
goto end;
1255
}
1256
1257
/* Create the Avahi service browser */
1258
sb = avahi_s_service_browser_new(mc.server, if_index,
1259
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1260
NULL, 0, browse_callback, NULL);
1261
if(sb == NULL){
1262
fprintf(stderr, "Failed to create service browser: %s\n",
1263
avahi_strerror(avahi_server_errno(mc.server)));
1264
exitcode = EXIT_FAILURE;
1265
goto end;
1266
}
1267
1268
/* Run the main loop */
1269
1270
if(debug){
1271
fprintf(stderr, "Starting Avahi loop search\n");
1272
}
1273
1274
avahi_simple_poll_loop(mc.simple_poll);
1275
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
1276
1083
end:
1277
1278
if(debug){
1279
fprintf(stderr, "%s exiting\n", argv[0]);
1280
}
1281
1282
/* Cleanup things */
1283
if(sb != NULL)
1284
avahi_s_service_browser_free(sb);
1285
1286
if(mc.server != NULL)
1287
avahi_server_free(mc.server);
1288
1289
if(mc.simple_poll != NULL)
1290
avahi_simple_poll_free(mc.simple_poll);
1291
1292
if(gnutls_initialized){
1293
gnutls_certificate_free_credentials(mc.cred);
1294
gnutls_global_deinit();
1295
gnutls_dh_params_deinit(mc.dh_params);
1296
}
1297
1298
if(gpgme_initialized){
1299
gpgme_release(mc.ctx);
1300
}
1301
1302
/* Removes the temp directory used by GPGME */
1303
if(tempdir_created){
1304
DIR *d;
1305
struct dirent *direntry;
1306
d = opendir(tempdir);
1307
if(d == NULL){
1308
if(errno != ENOENT){
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){
1309
1115
perror("opendir");
1310
}
1311
} else {
1312
while(true){
1313
direntry = readdir(d);
1314
if(direntry == NULL){
1315
break;
1316
}
1317
/* Skip "." and ".." */
1318
if(direntry->d_name[0] == '.'
1319
and (direntry->d_name[1] == '\0'
1320
or (direntry->d_name[1] == '.'
1321
and direntry->d_name[2] == '\0'))){
1322
continue;
1323
}
1324
char *fullname = NULL;
1325
ret = asprintf(&fullname, "%s/%s", tempdir,
1326
direntry->d_name);
1327
if(ret < 0){
1328
perror("asprintf");
1329
continue;
1330
}
1331
ret = remove(fullname);
1332
if(ret == -1){
1333
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1334
strerror(errno));
1335
}
1336
free(fullname);
1337
}
1338
closedir(d);
1339
}
1340
ret = rmdir(tempdir);
1341
if(ret == -1 and errno != ENOENT){
1342
perror("rmdir");
1343
}
1344
}
1345
1346
return exitcode;
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;
1347
1147
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0